Patent Publication Number: US-2023160182-A1

Title: Compositional multispectral and hyperspectral imaging systems for mining shovels and associated methods

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present application claims the benefit of U.S. Provisional Patent Application No. 63/282,087, filed Nov. 22, 2021, which is incorporated herein by reference in its entirety. 
    
    
     TECHNICAL FIELD 
     The present disclosure generally relates to mining detection systems having imaging systems and, in particular embodiments, to compositional multispectral and/or hyperspectral imaging systems positioned on mining equipment to classify ore and waste minerals at the mining site and associated methods and systems. 
     BACKGROUND 
     Mineral sorting is typically undertaken by one or more sorting machines in a single stage at a facility separate from the mining site that has sensor arrays controlling a matched array of diverters. Matched sensor/diverter arrays are typically positioned with respect to an ore transport mechanism (e.g., vibrating feeder, belt conveyor, free-fall type), which moves the material to be sorted past the sensors and through the diverters that sort the material into separate streams (e.g., an “accept” or “reject” stream). 
     Sorting machine capacity is limited by several factors, including controller speed, belt or feeder width, segregation of particle size ranges, and separation of mineral composition (e.g., sulfide or oxide). The mineral composition dictates the extraction process required to optimize ore recovery. For example, sulfide ores are transported to flotation circuits, while oxide ores are transported to leaching circuits. Thus, if the sorting process inaccurately diverts ore to the wrong processing circuit based on mineral composition, the value of the ore is diminished, which reduces the efficiency of the circuit. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Many aspects of the present disclosure can be better understood with reference to the following drawings. The components in the drawings are not necessarily to scale. Instead, emphasis is placed on clearly illustrating the principles of the present disclosure. 
         FIG.  1    is a perspective view of a mining detection system configured in accordance with embodiments of the present technology. 
         FIG.  2    is an enlarged perspective view of a compositional multispectral imaging system of the mining detection system of  FIG.  1    configured in accordance with embodiments of the present technology. 
         FIG.  3    is a block diagram of a compositional multispectral imaging system configured in accordance with embodiments of the present technology. 
         FIG.  4    is a diagram of a camera portion of the compositional multispectral imaging system of  FIG.  3   . 
         FIG.  5    is a diagram of a lighting portion of the compositional multispectral imaging system of  FIG.  3   . 
         FIG.  6    is a block diagram of a suitable computer that may employ aspects of the various embodiments of the present technology. 
         FIG.  7    is a block diagram illustrating a suitable system in which aspects of the various embodiments described herein may operate in a networked computer environment. 
     
    
    
     DETAILED DESCRIPTION 
     Disclosed herein are various embodiments of compositional imaging systems for mining shovels including multispectral imaging (MSI) and/or hyperspectral imaging (HSI) units, methods of sorting material using a mining shovel with compositional MSI and/or HSI units, and systems incorporating compositional MSI and/or HSI units at a mining site. In some embodiments disclosed herein, the mining shovels include a bucket having an MSI system with one or more spectroscopy heads (also referred to as an “MSI head assembly” or “head assembly”), each housing an MSI camera unit, a lighting unit, and a sensor generally positioned near an inlet of the bucket (e.g., the opening of the bucket in which material enters the bucket cavity). The MSI camera unit has a field of view in which the MSI camera unit captures images of mining material prior to, during, and/or after loading the mining material into the bucket. The MSI camera unit can include a lighting unit to capture images of the mining material with or without flash. The lighting unit can be spaced apart from the MSI camera unit and illuminate an irradiation region, which at least partially overlaps with the field of view of the MSI camera unit. The sensor can detect characteristics of the mining material in the field of view. The MSI heads can be in communication with a control component (e.g., one or more controllers, also referred to as “processing units”) mounted to the bucket and/or remote from the bucket and can receive and/or analyze the data collected by the MSI heads. 
     In some embodiments, one or more processing unit is used to identify the mineral composition of the ore and/or other mining material entering the bucket of the mining shovel. In some embodiments, the MSI heads can be positioned adjacent to one or more sensors that detect characteristics and/or properties of the bucket contents, e.g., including X-Ray Fluorescence (XRF) emitters, XRF detectors, laser distance sensors, ultrasonic distance sensors, lidar distance sensors, other multi-spectral imaging sensors, other flash tubes, hyperspectral imaging cameras, hyperspectral point spectrometers, stereoscopic cameras, radiation detectors, electromagnetic detectors, gamma-ray source sensors, and the like. The sensors can be positioned on a side wall of the bucket, on an upper wall portion of the bucket, adjacent to the MSI heads, between the MSI heads, and/or at other suitable sensor locations, and can be used in conjunction with the MSI heads to identify the mineral composition and improve the grade prediction of the ore and/or other mining material entering the bucket and/or positioned within the bucket. In some embodiments, any number of MSI heads can be used with any number of sensors. In some embodiments, the MSI heads described herein can be used, either in conjunction with the MSI heads positioned at the bucket or independently, for sensing mining material composition on a conveyor belt for carrying ore. Sorting the mineral composition at the mine face during digging reduces sorting operation costs by eliminating additional sorting machines and allowing an operator to make ore and/or other mining material routing decisions at the mine face and optimize the downstream extraction process. 
     The mining shovels with compositional MSI and/or HSI can be part of a system used in field operations (e.g., at a mining site) to direct where material located in the bucket should be transported. In addition to the bucket described above, the system can include additional signal processing equipment located remote from the bucket, such as in the chassis of the mining shovel, and communications links between the signal processing equipment in the bucket and the signal processing equipment in the chassis. In this manner, data can be relayed from the bucket to the chassis, where, for example, further data analysis can be carried out. The system can further include an operator&#39;s enterprise resource planning (ERP) system, a fleet management system, and/or communications links for transmitting information between all of the components of the system. In some embodiments, predetermined values relating to identification of material composition is stored in a database that is part of the ERP system, such that data transmitted to the ERP system from the bucket and/or chassis can be compared against the database to match patterns and thereby identify material composition. Once material composition is identified, signals can be sent from the ERP system to the fleet management system so that a determination of where to transport the material in the bucket can be made. In other embodiments, the material composition information is sent by the signal processing equipment to the fleet management system. The decision made by the fleet management system can subsequently be communicated to, for example, a local display located in the chassis of the mining shovel so that a shovel operator can deposit the bucket material in the appropriate location. 
     In some embodiments, a method of in-mine sensing and classification generally includes collecting imaging data of material in a mining shovel bucket using one or more MSI heads carried by the bucket and transmitting the data obtained from sensing the material to signal processing equipment. The method can further include identifying the composition of the material by processing the data with image processing equipment. In some embodiments, the method can further include sensing, by the sensors, additional characteristics of the received material to augment the material composition identification by the data provided by the MSI heads and determine further classification of the composition of the material. Once identified, the method can further include transmitting instructions of where to transport the bucket material, such as to a mining shovel operator. Destination instructions can also be sent to a haul truck that receives the material from the mining shovel and/or to other operators in the mining ecosystem remote from the mining shovel or mining site. 
     Specific details of several embodiments of the present technology are described herein with reference to  FIGS.  1 - 7   . The present technology, however, can be practiced without some of these specific details. In some instances, well-known structures and techniques often associated with mining detection systems, compositional MSI, and the like, have not been shown in detail so as not to obscure the present technology. Moreover, although many of the embodiments are described below with respect to systems and methods for identifying specific materials (e.g., sulfides and oxides) and/or systems and methods mounted to a mining shovel bucket, other applications and other embodiments in addition to those described herein are within the scope of the technology. Further, although many of the embodiments are described below with respect to systems and methods that use compositional MSI, the systems and methods can utilize HSI and components thereof (e.g., hyperspectral infrared point spectrometers) and/or color cameras (e.g., RGB cameras) in place of or in addition to the MSI components disclosed herein. 
     The terminology used in the description presented below is intended to be interpreted in its broadest reasonable manner, even though it is being used in conjunction with a detailed description of certain specific embodiments of the invention. Certain terms may even be emphasized below; however, any terminology intended to be interpreted in any restricted manner will be overtly and specifically defined as such in this Detailed Description section. 
     The accompanying  FIGS.  1 - 7    depict embodiments of the present technology and are not intended to be limiting of its scope. The sizes of various depicted elements are not necessarily drawn to scale, and these various elements can be arbitrarily enlarged to improve legibility. Component details can be abstracted in the Figures to exclude details such as position of components and certain precise connections between such components when such details are unnecessary for a complete understanding of how to make and use the present technology. Many of the details, dimensions, angles, and other features shown in the Figures are merely illustrative of particular embodiments of the disclosure. Accordingly, other embodiments can have other details, dimensions, angles, and features without departing from the spirit or scope of the present technology. 
       FIG.  1    is a perspective view of a mining detection system  100   a  (“system  100   a ”) including a mining shovel bucket  110  (“bucket  110 ”) carrying a compositional MSI system  101  (“MSI system  101 ”) configured in accordance with embodiments of the present technology. The bucket  110  can include a plurality of walls that form an open container having an interior volume in which mining material can be received and retained, and one or more sensors positioned to detect characteristics of material as it enters and/or when it is retained within the interior volume of the bucket  110 . The MSI system  101  can include at least one MSI head assembly  130 , which includes an MSI camera unit  132  and a lighting unit  134  positioned such that the MSI camera unit  132  can capture data from mining material entering or positioned within the cavity of the bucket  110 . The bucket  110  can include a control enclosure  140 , explained in greater detail below, that is operably coupled to components of the system  100   a , for example, the sensors, the MSI system  101 , and/or other electrical components. 
     In the illustrated embodiment, the bucket  110  includes a first side wall  111   a , a second side wall  111   b  opposite the first side wall  111   a , an upper wall  112   a , a lower wall  112   b  opposite the upper wall  112   a , and a back wall  113  that together create the interior volume of the bucket  110 . The bucket  110  may generally be any type of bucket suitable for use in mining shovel operations, including buckets of varying shapes, sizes, and materials. 
     The MSI system  101  can be mounted on or integrated into a portion of the bucket  110 . In the illustrated embodiment, for example, the MSI system  101  is positioned on the upper wall  112   a  of the bucket  110 . While  FIG.  1    shows only one MSI head assembly  130  positioned on the upper wall  112   a , the mining shovel bucket  110  can include any number of MSI head assemblies  130  positioned in various locations on the mining shovel bucket  110  (e.g., multiple MSI head assemblies  130  on the upper wall  112   a  (see  FIG.  2   ), on the first and second side walls  111   a  and  111   b , in the interior volume of the bucket  110 , etc.), above the bucket (e.g., on a structure mounted to a component of the mining shovel) or in any other suitable location where the MSI system  101  can capture images of the mining material prior to or during loading of the mining material into the bucket. Further, although each MSI head assembly  130  is shown with one MSI camera unit  132  and one lighting unit  134 , in some embodiments, the MSI head assembly  130  can include multiple MSI camera units per lighting unit, multiple lighting units per MSI camera unit, or multiple MSI cameras and lighting units. 
     In some embodiments, the mining shovel bucket  110  can further include one or more sensors positioned to detect characteristics of material as it enters and/or when it is retained within the interior volume of the bucket  110 . As shown in  FIG.  1   , for example, the system  100   a  can include in-cheek sensors  120  on the first side wall  111   a  and an in-cheek sensor  122  on the second side wall  111   b , each in-cheek sensor  120  and  122  facing inward towards the interior volume of the bucket  110  so that material entering and positioned within the interior volume can be subjected to sensing by the in-cheek sensors  120  and  122 . The bucket  110  can also or alternatively include at least one peripheral sensor  124  positioned along a periphery of an inlet  115  of the bucket  110  on the upper wall  112   a  and facing, e.g., downward (for a down looking peripheral sensor) at the entrance to or into the interior volume so that material being loaded into or within the interior volume can be subjected to sensing by the peripheral sensor  124 , outward so that material on the mining face can be subject to sensing by the peripheral sensor  124 , etc. The in-cheek sensors  120  and  122  and the peripheral sensor  124  can be any type of sensor suitable for use in analyzing and collecting data on mining material that can subsequently be used in determining the composition of the mining material. For example, the in-cheek sensors  120  and  122  and the peripheral sensor  124  can be radiometric sensors, photometric sensors, and/or electromagnetic sensors, e.g., the sensors shown and described in U.S. Pat. Nos. 9,522,415, 10,036,142, and 10,982,414, each titled MINING SHOVEL WITH COMPOSITIONAL SENSORS, which are incorporated by reference herein in their entirety. In some embodiments, the system  100   a  can include a greater number of in-cheek sensors and/or down looking sensors than shown in  FIG.  1   , and/or one or more of the in-cheek sensors and/or down looking sensors may be omitted. The sensors may be housed within and/or encapsulated by a ruggedized, non-metallic material such as one of vulcanized rubber or other rugged, non-conductive elastomeric material, that does not interfere with the operation of the sensor, yet provides a robust housing to protect the sensors from the rugged mining environment (e.g., hard, heavy materials being scooped within the bucket  110 ). 
       FIG.  2    is a perspective view of a system  100   b  configured in accordance with embodiments of the present technology. In the illustrated embodiment, the system  100   b  includes a first MSI head assembly  130   a  having a first MSI camera unit  132   a  and an associated a first lighting unit  134   a , and a second MSI head assembly  130   b  having a second MSI camera unit  132   b  and an associated second lighting unit  134   b . As shown in  FIG.  2   , a first peripheral sensor  124   a  can be positioned between the first MSI camera unit  132   a  and the first lighting unit  134   a , and a second peripheral sensor  124   b  can be positioned between the second MSI camera unit  132   b  and the second lighting unit  134   b . Embodiments with sensors positioned between the MSI head components allow the MSI camera and the sensor to gather data from the same portion of ore and/or other mining material entering or in the bucket  110  and correlate data for the same portion of ore. Positioning the down looking sensors between the MSI head components can allow a more dynamic grade model capable of compensating for changes in sulfide concentration. For example, copper content contained in sulfide materials (as opposed to oxide materials) may be underestimated with data gathered only by the down looking sensors, but using the sensor data in conjunction with the imaging data from the MSI heads  130   a  and  130   b  can compensate for changes in sulfide concentration. In some embodiments, an XRF sensor is used to determine the percent of copper in the mining material. In some embodiments, one or both of the peripheral sensors  124   a  and  124   b  can be omitted, the system  101  can include additional sensors, and/or sensors can be spaced apart from the MSI camera units  132   a  and  132   b.    
     Each MSI camera unit  132  has a field of view  136  (identified individually as a first field of view  136   a  and a second field of view  136   b ) and the associated lighting unit  134  has an irradiation region  137  (identified individually as a first irradiation region  137   a  and a second irradiation region  137   b ) directed such that at least a portion of the field of view  136  and the irradiation region  137  overlap with each other such that the lighting unit  134  illuminates the region in which the MSI camera unit  132  takes image data to enhance image quality and/or allow for image capture in dark environments. In the embodiment illustrated in  FIG.  2   , for example, the first camera field of view  136   a  of the first MSI camera unit  132   a  and the first irradiation region  137   a  are directed toward each other to a central region between the first MSI camera unit  132   a  and the first lighting unit  134   a , and generally aligned with the data capture area of the first peripheral sensor  124   a . Similarly, the second camera field of view  136   b  of second MSI camera unit  132   b  and the second irradiation region  137   b  are directed toward a region between the second MSI camera unit  132   b  and the second lighting unit  134   b , and generally aligned with the data capture area the second peripheral sensor  124   b . In some embodiments, for example, the field of view  136  of each MSI camera unit  132  and the corresponding illumination region  137  can be directed downwardly, into the interior compartment of the bucket  110 , and the peripheral sensor  124  can be a downward looking sensor directed to the same or overlapping region. In some embodiments, each MSI camera unit  132  and lighting unit  134  pair can be spaced apart from each other, rather than adjacent to each other, to provide for specific lighting characteristics, avoid the light from causing the direct capture of dust and other debris during imaging by the MSI camera unit  132 , and/or allow a sensor to be positioned therebetween. For example, the MSI camera unit  132  and the lighting unit  134  can be spaced apart by 500 mm to 800 mm. In some embodiments, the MSI camera unit  132  captures images without a flash. In some embodiments, the lighting unit is configured to emit a flash to provide a lighting environment for consistent data collection. In some embodiments, the lighting unit is configured to emit a constant light source to provide a consistent lighting environment for consistent data collection. 
     Referring to  FIGS.  1  and  2    together, the systems  100   a  and  100   b  can further include the control enclosure  140  (also referred to as a “control component”) operably coupled to components of the MSI system  101 , the sensors  120 ,  122 , and  124 , and/or other electrical components that collect data associated with the mined material as it enters the bucket  110  and/or when it is retained within the bucket  110 . The control enclosure  140  can be mounted to a surface of the bucket  110  (e.g., an exterior surface outside of the bucket cavity) or remote from the bucket  110 . In the illustrated embodiments, for example, the control enclosure can be mounted to a top exterior surface of the upper wall  112   a . The size, shape, and material of the enclosure  140  is generally not limited, and can be selected such that it safely accommodates and protects the various electronics that resides therein. The control enclosure  140  can house or otherwise carry image processing components, signal processing components, communication components, memory components, and/or a wide variety of other or additional components used in carrying out partial or complete processing of imaging data and/or sensor data received from the MSI system  101  and/or the sensors  120 ,  122 , and  124  and/or transmit that data. For example, image and signal processing electronics of the control enclosure  140  can receive image data and signals from the MSI system  101  and/or the sensors  120 ,  122 , and  124 , and partially or fully process the image data and/or signals to identify the composition of the mining material loaded in the bucket  110 . The communications components can then transmit signals including the processed data from the bucket  110  to locations remote to the bucket  110  (e.g., to the chassis of the mining shovel, haul trucks, mobile devices, remote stations on the mining operation field). In some embodiments, the communications components housed in the enclosure  140  are wireless communications components that wirelessly deliver signals to transmit the processed data and/or associated information. In a situation where wireless communications are lost, the enclosure  140  can continue to operate independently and resume data communication when the connection is restored. The enclosure  140  can further house imaging, lighting, and/or sensor electronics that are part of the MSI camera units  132 , the lighting units  134 , and/or the sensors  120 ,  122 , and  124 . The enclosure  140  can draw power from the mining shovel machine and/or include on-board power components (e.g., batteries, solar power) for powering the various MSI camera units  132 , lighting units  134 , sensors  120 ,  122 , and  124 , image and signal processing equipment, communication components, and the like. In some embodiments, the MSI system described herein can be used, either in conjunction with the MSI system positioned at the bucket or independently, at a location different from the bucket. For example, in some embodiments, the MSI system can be used for sensing mining material composition on a conveyor belt for carrying ore. In other embodiments, the MSI system described herein can be used for sensing mining material composition on an in-pit hopper that helps optimize the loading of hauling trucks. 
       FIG.  3    is a block diagram showing additional details of one of the MSI head assemblies  130  of the MSI system  101  of  FIGS.  1  and  2    configured in accordance with embodiments of the present technology. The MSI head assembly  130  includes the MSI camera unit  132  and the lighting unit  134 . The MSI camera unit  132  can include a lens  131  to focus the image on the sensor of the MSI camera unit  132 , and a band pass filter  133  positioned over the lens  131  to provide the proper spectral range for the MSI camera unit  132 . The filter  133  and the lens  131  can be protected by dirt and debris with a window  135 . In some embodiments, the window  135  can be a self-cleaning window, e.g., the self-cleaning windows shown and described in U.S. Provisional Patent Application No. 63/281,929, filed Nov. 22, 2021, and titled SELF-CLEANING SENSOR WINDOW AND ASSOCIATED SYSTEMS AND METHODS, which is appended hereto in Appendix A. The head assembly  130  can further include a hardware trigger  150  configured to actuate the MSI camera unit  132  and the lighting unit  134  based on input from a proximity sensor  141  (e.g., a laser, see  FIG.  4   ) that is configured to detect the distance between the MSI camera unit  132  and the mining material. Further, a central processing unit  160  can be in communication with the MSI camera unit  132  and the lighting unit  134  to provide a software trigger to actuate the MSI camera unit  132  and the lighting unit  134 , e.g., by an operator input, by instructions from the software, at a set interval, etc. The central processing unit  160  can be in communication with the system of the mining shovel  162  through a cable reel, other communication line, and/or a wireless connection. The head assembly  130  can further include a power source  152  operably coupled to the various system components (e.g., the hardware trigger  150 , the MSI camera unit  132 , the lighting unit  134 , and the like) and configured to provide power to these components. The components of the head assembly  130  can be housed within a single housing, spaced apart from each other in different housings (e.g., the control enclosure  140  of  FIGS.  1  and  2   ), and/or separate components operably connected to each other. 
     The lighting unit  134  can have varied light characteristics (e.g., pulsed or continuous beam, and varying spectra, illumination area, illumination intensity, and illumination distribution), and the lighting unit  134  can be triggered by the hardware trigger  150 . The lighting unit  134  can be any suitable light source (e.g., xenon, halogen, incandescent, etc.), and the light source types for the lighting unit  134  may be specified based on expected durability when mounted in an environment such as the bucket  110 . In some embodiments, the wavelengths of the light emitted from the lighting unit  134  can be predefined and configured to match and even extend beyond that of the MSI camera unit  132 . In other embodiments, the wavelengths of light emitted from the lighting unit  134  can be predefined and configured to be of different wavelengths than that of the MSI camera unit  132 . Each lighting unit  134  can include a lens and a reflector that enhance the uniformity of the illumination pattern (e.g., the illumination region  137  of  FIG.  2   ). 
     During mining operations, if the proximity sensor  141  detects mining material within the depth of field (DOF) of the MSI camera unit  132  (e.g., between 1 m and 2 m of the MSI camera unit  132 ), the hardware trigger  150  and/or the central processing unit  160  can actuate the MSI camera unit  132  to initiate the capturing of a series of images that can be used by the image processing equipment to analyze the mining material entering or contained within the bucket  110 . In some embodiments, the MSI camera unit  132  can collect images using ambient light, or can be used in conjunction with light emitted by the lighting unit  134 . Images captured using ambient light can be corrected in post image processing, which may eliminate the need for a lighting unit in the MSI head assembly  130 . In some embodiments, a first image is taken by the MSI camera unit  132  without light from the lighting unit  134  and near the midrange of the DOF of the MSI camera unit  132 . Once the first image is taken, the lighting unit  134  can sync with the MSI camera unit  132  to capture a subsequent image with illumination and also near the midrange of the DOF of the MSI camera unit  132 . Any order of image with ambient light or with illumination is also within the scope of the present technology. The image processing system can use the captured images to estimate the material composition and divide it into several categories, e.g., high oxide, low oxide, oxide absent, etc. The data from the image processing system can be used with the sensor data from additional sensors (e.g., down-looking sensors) to further classify the mining material and increase classification accuracy and determine ore-waste distinctions, such as whether the ore and/or other mining material should be processed or discarded. 
       FIG.  4    is a schematic illustration of camera components of the MSI system  101  of  FIGS.  1  and  2   . The camera components illustrated in  FIG.  4    can be housed within a single housing, spaced apart from each other in different housings (e.g., the control enclosure  140  of  FIGS.  1  and  2   ), and/or separate components operably connected to each other. As shown in  FIG.  4   , the MSI camera unit  132  is in communication with an MSI camera board  180 , which is in communication with a camera head input connector  190  (e.g., the image processing equipment of the control enclosure  140  of  FIGS.  1  and  2   ) and a camera head output connector  192  to the lighting unit  132  (see  FIG.  5   ). The MSI camera board  180  can include a super capacitor assembly  182 . The MSI camera board  180  is in communication with a programmable logic controller (PLC)  168  configured to monitor the state of input devices and make decisions based upon software to control the state of output devices. The PLC  168  is in communication with an input/output (TO) link master  166  that provides a link for communication between various components of the schematic of  FIG.  4   . The IO link master  166  is in communication with a camera temperature sensor  164  configured to determine, for example, if the MSI camera unit  132  is below an operating temperature range. If the temperature is below an operating temperature range, the PLC  168  can send a signal through the MSI camera board  180  to a heater  178  configured to heat the MSI camera unit  132  to within the operating temperature range. The proximity sensor  141  can be used to determine if mining material is within the DOF of the MSI camera unit  132 . The MSI system  101  may further include a shutter  170  in communication with the MSI camera board  180  and configured to protect the window  135 , the filter  133 , and the lens  131  during use. The shutter  170  can be actuated by a proximity sensor for opening  172  and a proximity sensor for closing  174 . 
       FIG.  5    is a schematic illustration of lighting components of the MSI system  101  of  FIGS.  1  and  2   . The lighting components illustrated in  FIG.  5    can be housed within a single housing, spaced apart from each other in different housings (e.g., the control enclosure  140  of  FIGS.  1  and  2   ), and/or separate components operably connected to each other. As shown in  FIG.  5   , the lighting unit  134  is in communication with an MSI flash board  202 , which is in communication with a camera head input connector  194  from the camera head output connector  192 . In other embodiments, the MSI flash board  202  is in communication with the system (e.g., the image processing equipment of the control enclosure  140  of  FIGS.  1  and  2   ). The MSI flash board  202  is in communication with an analog input (AI) module  204  and with an IO module  206  that provides a link for communication between various components of the schematic of  FIG.  5   . The MSI flash board  202  is in communication with a trigger board  210  having storage capacitors  212 , where the trigger board  210  is configured to actuate the lighting unit  134 . The MSI system  101  may further include a shutter  220  in communication with the IO module  204  and configured to protect the lighting unit  134  while not in use. The shutter  220  can be actuated by a proximity sensor for opening  222  and a proximity sensor for closing  224 . 
       FIG.  6    and the following discussion provide a brief, general description of a suitable computing environment in which aspects of the disclosed system can be implemented. Although not required, aspects and embodiments of the disclosed system will be described in the general context of computer-executable instructions, such as routines executed by a general-purpose computer, e.g., a server or personal computer. Those skilled in the relevant art will appreciate that the various embodiments can be practiced with other computer system configurations, including Internet appliances, hand-held devices, wearable computers, cellular or mobile phones, multi-processor systems, microprocessor-based or programmable consumer electronics, set-top boxes, network PCs, mini-computers, mainframe computers and the like. The embodiments described herein can be embodied in a special purpose computer or data processor that is specifically programmed, configured or constructed to perform one or more of the computer-executable instructions explained in detail below. Indeed, the term “computer” (and like terms), as used generally herein, refers to any of the above devices, as well as any data processor or any device capable of communicating with a network, including consumer electronic goods such as game devices, cameras, or other electronic devices having a processor and other components, e.g., network communication circuitry. 
     The embodiments described herein can also be practiced in distributed computing environments, where tasks or modules are performed by remote processing devices, which are linked through a communications network, such as a Local Area Network (“LAN”), Wide Area Network (“WAN”) or the Internet. In a distributed computing environment, program modules or sub-routines may be located in both local and remote memory storage devices. Aspects of the system described below may be stored or distributed on computer-readable media, including magnetic and optically readable and removable computer discs, stored as in chips (e.g., EEPROM or flash memory chips). Alternatively, aspects of the system disclosed herein may be distributed electronically over the Internet or over other networks (including wireless networks). Those skilled in the relevant art will recognize that portions of the embodiments described herein may reside on a server computer, while corresponding portions reside on a client computer. Data structures and transmission of data particular to aspects of the system described herein are also encompassed within the scope of this application. 
     Referring to  FIG.  6   , one embodiment of the system described herein employs a computer  1000 , such as a personal computer or workstation, having one or more processors  1010  coupled to one or more user input devices  1020  and data storage devices  1040 . The computer is also coupled to at least one output device such as a display device  1060  and one or more optional additional output devices  1080  (e.g., printer, plotter, speakers, tactile or olfactory output devices, etc.). The computer may be coupled to external computers, such as via an optional network connection  1100 , a wireless transceiver  1120 , or both. 
     The input devices  1020  may include a keyboard and/or a pointing device such as a mouse. Other input devices are possible such as a microphone, joystick, pen, game pad, scanner, digital camera, video camera, and the like. The data storage devices  1040  may include any type of computer-readable media that can store data accessible by the computer  1000 , such as magnetic hard and floppy disk drives, optical disk drives, magnetic cassettes, tape drives, flash memory cards, digital video disks (DVDs), Bernoulli cartridges, RAMs, ROMs, smart cards, etc. Indeed, any medium for storing or transmitting computer-readable instructions and data may be employed, including a connection port to or node on a network such as a local area network (LAN), wide area network (WAN) or the Internet (not shown in  FIG.  6   ). 
     Aspects of the system described herein may be practiced in a variety of other computing environments. For example, referring to  FIG.  7   , a distributed computing environment with a web interface includes one or more user computers  2020  in a system  2000  are shown, each of which includes a browser program module  2040  that permits the computer to access and exchange data with the Internet  2060 , including web sites within the World Wide Web portion of the Internet. The user computers may be substantially similar to the computer described above with respect to  FIG.  6   . User computers may include other program modules such as an operating system, one or more application programs (e.g., word processing or spread sheet applications), and the like. The computers may be general-purpose devices that can be programmed to run various types of applications, or they may be single-purpose devices optimized or limited to a particular function or class of functions. More importantly, while shown with web browsers, any application program for providing a graphical user interface to users may be employed, as described in detail below; the use of a web browser and web interface are only used as a familiar example. 
     At least one server computer  2080 , coupled to the Internet or World Wide Web (“Web”)  2060 , performs much or all of the functions for receiving, routing and storing of electronic messages, such as web pages, audio signals, and electronic images. While the Internet is shown, a private network, such as an intranet may indeed be preferred in some applications. The network may have a client-server architecture, in which a computer is dedicated to serving other client computers, or it may have other architectures such as a peer-to-peer, in which one or more computers serve simultaneously as servers and clients. A database  2100  or databases, coupled to the server computer(s), stores much of the web pages and content exchanged between the user computers. The server computer(s), including the database(s), may employ security measures to inhibit malicious attacks on the system, and to preserve integrity of the messages and data stored therein (e.g., firewall systems, secure socket layers (SSL), password protection schemes, encryption, and the like). 
     The server computer  2080  may include a server engine  2120 , a web page management component  2140 , a content management component  2160  and a database management component  2180 . The server engine performs basic processing and operating system level tasks. The web page management component handles creation and display or routing of web pages. Users may access the server computer by means of a URL associated therewith. The content management component handles most of the functions in the embodiments described herein. The database management component includes storage and retrieval tasks with respect to the database, queries to the database, and storage of data. 
     FURTHER EXAMPLES 
     The following examples are illustrative of several embodiments of the present technology: 
     1. A mining detection system for mining shovels, the mining detection system comprising:
         a head assembly configured to be positioned at an inlet portion of a mining shovel bucket, the head assembly comprising—
           a camera unit comprising a multispectral imaging (MSI) camera unit and/or a hyperspectral imaging (HSI) camera unit, wherein the camera unit has a field of view and is configured to capture images of mining material prior to, during, and/or after loading the mining material into the mining shovel bucket;   a lighting unit spaced apart from the camera unit and configured to illuminate an irradiation region, wherein at least a portion of the irradiation region overlaps with at least a portion of the field of view; and   a sensor configured to detect characteristics of the mining material in the field of view; and   
           a control component comprising a processing unit operably coupled to the head assembly.       

     2. The mining detection system of any one of the examples herein wherein the camera unit is a first camera unit, wherein the first camera unit is a compositional multispectral imaging (MSI) camera unit, and the head assembly further comprises a second camera unit, wherein the second camera unit is a compositional hyperspectral imaging (HSI) camera unit. 
     3. The mining detection system of any one of the examples herein wherein the camera unit comprises a lens and a band pass filter positioned over the lens, and wherein the head assembly further comprises a window configured to protect the camera unit. 
     4. The mining detection system of any one of the examples herein wherein the lighting unit is configured to emit light having a predefined wavelength range corresponding to a camera wavelength range detectable by the camera unit. 
     5. The mining detection system of any one of the examples herein wherein the lighting unit is configured to emit light having a predefined wavelength range different from a camera wavelength range detectable by the camera unit. 
     6. The mining detection system of any one of the examples herein wherein the camera unit and the lighting unit are downward looking such that the field of view and the irradiation region are configured to be directed into the mining shovel bucket. 
     7. The mining detection system of any one of the examples herein wherein the processing unit is configured to determine a material composition of the mining material based on the images captured by the imaging system. 
     8. The mining detection system of any one of the examples herein wherein the sensor is an in-cheek sensor configured to be positioned on a side wall portion of the mining shovel bucket. 
     9. The mining detection system of any one of the examples herein wherein the sensor is positioned between the camera unit and the lighting unit. 
     10. The mining detection system of any one of the examples herein wherein the sensor is a proximity sensor configured to determine whether the mining material is within a depth of field (DOF) of the camera unit, and wherein the mining detection system further comprises a shutter positioned to protect a lens of the camera unit, the shutter being operably coupled to the proximity sensor such that the proximity sensor is configured to actuate the shutter when the mining material is within the DOF. 
     11. The mining detection system of any one of the examples herein wherein the sensor is a radiometric sensor, a photometric sensor, and/or an electromagnetic sensor. 
     12. The mining detection system of any one of the examples herein wherein the control component is configured to, based on the images from the camera unit, classify the mining material in one of the following categories: high oxide, low oxide, or oxide-absent. 
     13. The mining detection system of any one of the examples herein wherein the sensor is an x-ray fluorescence sensor configured to determine a percent of copper in the mining material. 
     14. The mining detection system of any one of the examples herein wherein the head assembly is housed within a ruggedized and/or non-metallic material configured to not interfere with operation of the sensor. 
     15. A mining detection system for mining shovels, the mining detection system comprising:
         a head assembly configured to be positioned at an inlet portion of a mining shovel bucket, the head assembly comprising—
           a camera unit comprising a multispectral imaging (MSI) camera unit and/or a hyperspectral imaging (HSI) camera unit, wherein the camera unit has a field of view and is configured to capture images of mining material prior to, during, and/or after loading the mining material into the mining shovel bucket; and   a lighting unit spaced apart from the camera unit and configured to illuminate an irradiation region, wherein at least a portion of the irradiation region overlaps with at least a portion of the field of view; and   
           a control component comprising a processing unit operably coupled to the head assembly.       

     16. The mining detection system of any one of the examples herein, further comprising a mining shovel bucket, wherein the head assembly is positioned at an inlet portion, an upper wall portion of, at an interior side wall portion of, or above the mining shovel bucket. 
     17. The mining detection system of example 16 wherein the control component is positioned at an exterior upper wall portion of the mining shovel bucket. 
     18. The mining detection system of any one of the examples herein further comprising a sensor configured to detect characteristics of the mining material in the field of view. 
     19. The mining detection system of example 18 wherein the sensor is an in-cheek sensor positioned on a first side wall portion, a second side wall portion, or an upper wall portion of the mining shovel bucket. 
     20. The mining detection system of example 18 wherein the sensor is a peripheral sensor positioned on an inlet portion of the mining shovel bucket and between the camera unit and the lighting unit. 
     21. A method of classifying and sorting mining material at a mine site, the method comprising:
         receiving the mining material in an interior region of a mining shovel bucket;   capturing images of the mining material entering or within the interior region using a camera unit positioned at an inlet portion of the mining shovel bucket, wherein the camera unit comprises a compositional multispectral imaging (MSI) camera unit and/or a compositional hyperspectral imaging (HSI) camera unit; and   processing, via a control component operably coupled to the camera unit, the images captured by the camera unit to identify compositional properties of the mining material.       

     22. The method of any one of the examples herein, further comprising illuminating at least a portion of a field of view of the camera unit while the camera unit is capturing images of the mining material. 
     23. The method of any one of the examples herein, further comprising:
         determining, via a proximity sensor, whether the mining material is within a depth of field (DOF) of the camera unit; and   initiating the capture of images via the camera unit when in the DOF.       

     24. The method of any one of the examples herein, further comprising determining, via an x-ray fluorescence sensor, a percent of copper in the mining material. 
     25. The method of any one of the examples herein wherein the images are captured by the camera unit with a flash. 
     26. The method of any one of the examples herein wherein the images are captured by the camera unit without a flash. 
     27. The method of any one of the examples herein further comprising classifying the mining material, based on the images captured by the camera unit, in one of the following categories: high oxide, low oxide, or oxide-absent. 
     28. The method of example 27 further comprising sorting the mining material based on the categories. 
     CONCLUSION 
     In general, the detailed description of embodiments of the present technology is not intended to be exhaustive or to limit the invention to the precise form disclosed above. While specific embodiments of, and examples for, the present technology are described above for illustrative purposes, various equivalent modifications are possible within the scope of the present technology, as those skilled in the relevant art will recognize. For example, while processes or blocks are presented in a given order, alternative embodiments may perform routines having steps, or employ systems having blocks, in a different order, and some processes or blocks may be deleted, moved, added, subdivided, combined, and/or modified. Each of these processes or blocks may be implemented in a variety of different ways. Also, while processes or blocks are at times shown as being performed in series, these processes or blocks may instead be performed in parallel, or may be performed at different times. 
     Aspects of the present technology may be stored or distributed on computer-readable media, including magnetically or optically readable computer discs, hard-wired or preprogrammed chips (e.g., EEPROM semiconductor chips), nanotechnology memory, biological memory, or other data storage media. Alternatively, computer implemented instructions, data structures, screen displays, and other data under aspects of the present technology may be distributed over the Internet or over other networks (including wireless networks), on a propagated signal on a propagation medium (e.g., an electromagnetic wave(s), a sound wave, etc.) over a period of time, or they may be provided on any analog or digital network (packet switched, circuit switched, or other scheme). Those skilled in the relevant art will recognize that portions of the present technology reside on a server computer, while corresponding portions reside on a client computer such as a mobile or portable device, and thus, while certain hardware platforms are described herein, aspects of the present technology are equally applicable to nodes on a network. 
     The teachings of the present technology provided herein can be applied to other systems, not necessarily the system described herein. The elements and acts of the various embodiments described herein can be combined to provide further embodiments. 
     Any patents, applications and other references, including any that may be listed in accompanying filing papers, are incorporated herein by reference. Aspects of the present technology can be modified, if necessary, to employ the systems, functions, and concepts of the various references described above to provide yet further embodiments of the present technology. 
     These and other changes can be made to the present technology in light of the above Detailed Description. While the above description details certain embodiments of the present technology and describes the best mode contemplated, no matter how detailed the above appears in text, the present technology can be practiced in many ways. Details of the present technology may vary considerably in its implementation details, while still being encompassed by the present technology disclosed herein. As noted above, particular terminology used when describing certain features or aspects of the present technology should not be taken to imply that the terminology is being redefined herein to be restricted to any specific characteristics, features, or aspects of the present technology with which that terminology is associated. In general, the terms used in the following claims should not be construed to limit the present technology to the specific embodiments disclosed in the specification, unless the above Detailed Description section explicitly defines such terms. Accordingly, the actual scope of the invention encompasses not only the disclosed embodiments, but also all equivalent ways of practicing or implementing the present technology.