Abstract:
A railcar has an on-board system for detecting conditions of the railcar. The on-board system. Includes a plurality of condition sensors positioned on the railcar. A transceiver is in communication with each of the plurality of condition sensors so as to receive condition data from the plurality of condition sensors. The transceiver transmits the condition data to a receiving station remote from the railcar tor review and analysis.

Description:
CLAIM OF PRIORITY 
       [0001]    This application is a continuation of U.S. patent application Ser. No. 12/705,028, filed Feb. 12, 2010, currently pending, which claims priority to U.S. Provisional Patent Application Ser. No. 61/152,082, filed Feb. 12, 2009, currently pending. 
     
    
     FIELD OF THE INVENTION 
       [0002]    The present invention relates to railcars and, more particularly, to a system for detecting the condition of railcars. 
       BACKGROUND 
       [0003]    Transporting commodities by common rail carrier is one of the most economical and efficient means to move commodities to destination points across North America. Most railcars transport a certain volume or weight of commodity which determines the commercial value of materials being shipped. Most railcars are loaded to capacity of the railcar by either volume or weight. In either case, the weight of the commodity is essential to determine the value of commodity being transported. 
         [0004]    There are several prior art devices that can detect and communicate to a user if a railcar is either empty or loaded. These devices are basically position devices that determine the compression of a railcar truck suspension spring. Such a device indicates whether the suspension spring is fully compressed (loaded car) or fully relaxed (empty car). This method does not measure the specific weight of the railcar, but rather the status: either empty or loaded. Furthermore, such devices are not suitable for transmission of the load information to a remote location. 
         [0005]    Prior art weighing devices also are typically unable to withstand the rigors of the railcar environment. Therefore, in today&#39;s shipping world, railcar weight is commonly measured at origin and destination points with in-rail track scales. This process is slow and susceptible to false weight measurement. 
         [0006]    Weighing devices that use load cells that are on-board railcars are known. For example, U.S. Pat. No. 6,441,324 to Stimpson discloses a weighing system for railroad cars where a load cell is designed to fit on the bottom of the railcar center plate mid fit into the railcar truck center bowl. The output of the load cell is provided to a telemetry transmitter, which transmits an indication of weight to a user, While, the vast majority of a railcar weight is located above and through the center plate, all railcars experience some, sideways rock and roil, due to rail track curvature, banking and other irregularities. As a result, the railcar rocks, or pivots, on the center plate. The amount of rock and roll a railcar exhibits is controlled by the side bearings. Under most conditions, moving or stationary, a railcar will be leaning to one side and on one of these side bearings. This causes a weighing system based solely on the center plate, as is the case for the &#39;324 patent, to be inaccurate on many occasions. 
         [0007]    A need therefore exists for a weighing system that is accurate, durable and that may transmit data to a remote location. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS  
         [0008]      FIG. 1  is a side elevation view of a tank car equipped with an embodiment of the system of the present invention; 
           [0009]      FIG. 2  is a bottom perspective view of the body bolsters and tank of the tank car of  FIG. 1 ; 
           [0010]      FIG. 3  is an enlarged top perspective view of one of the truck assemblies of the tank car of  FIG. 1 ; 
           [0011]      FIG. 4  is an end elevation view of central portions of one of the body bolsters of  FIG. 2  and the truck assembly of  FIG. 3  illustrating the connection between the center plate of the body bolster and the center bowl of the truck assembly; 
           [0012]      FIG. 5  is a perspective view of a center plate load cell in an embodiment of the system of the present invention; 
           [0013]      FIG. 6  is a bottom plan view of the center plate load cell of  FIG. 5 ; 
           [0014]      FIG. 7  is a front elevation view of half of a body bolster and half of the truck bolster illustrating double roller style side bearings; 
           [0015]      FIG. 8  is a front elevation view of half of a body bolster and half of the truck bolster illustrating friction block style side bearings; 
           [0016]      FIG. 9  is an enlarged perspective view showing a side bearing load cell with a double roller style side bearing; 
           [0017]      FIG. 10  is an enlarged perspective view showing a side bearing load cell with a friction block style side bearing; 
           [0018]      FIG. 11  is an enlarged perspective view showing a side bearing load cell with a constant contact style side bearing; 
           [0019]      FIG. 12  is a circuit diagram showing the circuitry associated with the center plate load cell and side bearing load cells in an embodiment of the system of the present invention; 
           [0020]      FIG. 13  is a flow chart illustrating processing of summed load cell signals from the circuit of  FIG. 12  in accordance with an embodiment, of the system and method of the present invention; 
           [0021]      FIG. 14  is a flow diagram illustrating the data transmission and reception components in an embodiment of the system of the invention. 
       
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS 
       [0022]    A tank car equipped with load cells, transducers and sensors in an embodiment of the system and method of the invention is indicated in general at  20  in  FIG. 1 . While a tank car is illustrated, alternative types of railcars may be employed with the system and method of the present invention as well. As is well known in the art, the tank car features a tank  21  that is supported upon front and rear truck assemblies  22   a  and  22   b  by front and rear body bolsters  24   a  and  24   b,  respectively. The tank car wheels  26   a  and  26   b  are mounted to the front, and rear truck assemblies  24   a  and  24   b.  As an alternative to the individual separate body bolsters of  FIG. 1 , the railcar could feature a full underframe including integrated body bolsters. The tank, or other storage unit, and the supporting body bolsters or similar structure, make up the body of the railcar. 
         [0023]    As illustrated in  FIG. 2 , the body bolster  24   a  features a pair of bolster webs  28  and  32  to which bottom flanges  34  and  35  are attached. The holster webs flank the draft sill  36 , which serves as a housing for the railcar coupler. A center plate  38  is attached to the bottom surface of the draft sill, typically by bolts. The center plate features a central opening  40 . 
         [0024]    An enlarged view of the truck assembly  22   a  of the tank car of  FIG. 1  is provided in  FIG. 3 . As illustrated in  FIG. 3 , the truck assembly features a pair of side, frames  44  and  46  which support, the railcar wheels and axles ( 47 ) via bearings  48 . The side frames are mounted to opposite ends of a truck assembly bolster  52  via springs  54 . A center bowl  42  is positioned in the center of the top surface of the bolster  52 . A center pin  56  projects upwards from the center of the center bowl. Track assembly  22   b  ( FIG. 1 ) features a similar construction. 
         [0025]    As illustrated in  FIG. 4 , the center plate  38  of  FIG. 2  fits into and rotates within the center bowl  42  of  FIG. 3  of the truck assembly. The central opening  40  of the center plate receives the center pin  56  of the truck assembly. The center plate thus is the component of the rail car that provides positioning of the railcar truck assembly and allows rotation of the truck assemblies while the railcar negotiates rail track curvature. 
         [0026]    In accordance with an embodiment of the system and method of the present invention, a center plate load transducer is fabricated to replicate the center plate  38  of  FIGS. 2 and 4  and replaces it so as to be capable of measuring a component of the weight of the tank car load while functioning as a center plate. An embodiment of the center plate load cell is indicated in general at  62  in  FIGS. 5 and 6 . As illustrated in  FIGS. 5 and 6 , the center plate load cell utilizes a series of strain gage pairs  64   a - 64   d  positioned in an annular machined groove  66  to measure the strain in the steel material of the load cell Each strain gage pair includes first and second strain gages that are secured one each to opposing portions of the groove side walls and are electrically connected in series. As explained in greater detail below, the strain gages are wired into a Wheatstone bridge circuit to make the central plate load cell sensitive enough and capable of measuring within a few pounds of the total 286,000 lb. (for example) railcar. The center plate load cell also includes a central opening  68  that receives the center pin  56  ( FIG. 3 ) of the truck assembly. 
         [0027]    The central plate load cell therefore features a sate, secure and non-conspicuous mounting location that enables it to withstand the rigors of the railcar environment. 
         [0028]    The specific load cell structure illustrated in  FIGS. 5 and 6  represents an example only. Other devices or structures may be used as long as they may be mounted between the underside of the body bolster ( 24   a  of  FIGS. 1 and 2 ) and the center bowl ( 42  in  FIGS. 3 and 4 ) of the-truck assembly. For example, suitable center plate load cells or transducers include the Model RT load cell available from DJ Instruments of Billerica, Mass. Alternatively, a load cell may be used that attaches to the bottom surface of the existing center plate. Such a load cell is presented in U.S. Pat. No. 6,441,324 to Stimpson. 
         [0029]    In accordance with the present invention, the center plate load cell is supplemented with side bearing load cells to more accurately determine the weight of the tank car load, as will now be explained. 
         [0030]    As illustrated in  FIG. 3 , the truck assembly is also provided with a pair of side bearings, indicated in general at  72  and  74 . When the truck assembly and body bolster are assembled, they are in alignment with the corresponding side bearing plates, illustrated at  76  and  78  in  FIG. 2 , positioned on the bottom flanges  34  and  35  of the bolster webs  28  and  32 . The side bearings and corresponding side bearing plates function to control railcar rocking and rolling. 
         [0031]    As illustrated in  FIGS. 3 and 7 , the side bearings  72  and  74  may include double rollers  82   a - 82   d.  In such an embodiment, the side bearing plates, indicated in general at  78  in  FIGS. 7 and 9 , include a side bearing plate bracket  84  and a side bearing plate shim  86  mounted to the bottom surface of the bracket  84 . As illustrated in  FIG. 9 , the rollers  82   a  and  82   b  are mounted in a roller cage  92  positioned on the top surface of the truck assembly bolster  32 . The remaining side bearings and side bearing plates feature a similar construction. 
         [0032]    In an alternative embodiment, the side hearings may take the form of a friction pad, indicated at  94  in  FIGS. 8 and 10  and positioned on the top surface of the truck assembly bolster  52 . As illustrated in  FIG. 10 , the friction pad may include a base portion  96  and a pad of friction material  98  positioned on the base portion. As illustrated in  FIGS. 8 and 10 , the side bearing plates take the form of shims  102  mounted to the underside of the bottom flange  35  of the bolster web  32 . The remaining side bearings and side bearing plates feature a similar construction. 
         [0033]    Another option for the side bearings and side bearing plates is the constant contact style illustrated in  FIG. 11 . In this embodiment, each side bearing includes a housing  104  positioned on the top surface of the truck assembly bolster  52  that contains a resilient member  106  constructed of rubber or a similar resilient hut durable material. The side bearing plates take the form of shims  108  mounted to the underside of the bottom flange  35  of the bolster web  32 . The remaining side bearings and side bearing plates feature a similar construction. The constant contact side bearings use the resilient members to keep constant contact with corresponding side bearing plates without requiring a specified gap between them, 
         [0034]    As noted previously, the vast majority of a railcar weight is located above and through the center plate. Because of rail track curvature, banking and other irregularities, however, all railcars allow for some sideways rock and roll. In this case, the railcar rocks, or pivots, on the center plate load cell  62 . As also noted previously, the amount of rock and roll a railcar exhibits is controlled by the side bearings. Under most conditions, moving or stationary, a railcar will be leaning to one side and on one of these side bearings. Therefore, to measure the true amount of weight, the outputs of the center plate and side bearing load cells must be summed to calculate the total railcar weight. The circuitry of the combined load cells accounts for the total weight of the railcar load, 
         [0035]    As illustrated in  FIGS. 9 , in an embodiment where the side bearings include double rollers, strain gages  110   a - d  are positioned on the top surface of the each side bearing bracket ( 84  in  FIG. 9 ). The strain gages measure the strain in the steel material of the side bearing brackets. The strain gages therefore convert the side bearing brackets into side bearing load cells. 
         [0036]    A similar approach is used to form the side bearing load cells in  FIG. 10 . More specifically, as illustrated in  FIG. 10 , strain gages  112   a - d  are positioned on the top surface of the bottom flange  35  of the bolster web  32  so as to be positioned over the side bearing plate shims  102 . The strain gages measure the strain in the steel material of that portion of the flange. The strain gages therefore convert at least a portion of each bottom flange into a side bearing load cell. 
         [0037]    A similar approach is used to form the side bearing load cells in  FIG. 11 . More specifically, as illustrated in  FIG. 11 , strain gages  114   a - d  are positioned on the top surface of the bottom flange  35  of the bolster web  32  so as to be positioned over the side bearing plate shims  108 . The strain gages measure the strain in the steel material of that portion of the flange. The strain gages therefore convert at least a portion of each bottom flange into a side bearing load cell. 
         [0038]    Alternatively, the strain gages may be positional on one of more of the shims  86 ,  102  and  104  of the side bearing plates of  FIGS. 9 ,  10  and  11 , respectively, to form the side bearing load cells. As a further alternative to the embodiments of the side bearing load cells illustrated in  FIGS. 9-11  the Model PD side bearing load cell from DJ Instruments of Billerica, Mass. may be used. 
         [0039]    In a preferred embodiment of the invention, the system includes three load cells (one center load cell and two side bearing load cells) placed at one end of the railcar as described above. Since most all railcars ride on near level tracks, the system needs to only measure the weight at one end of the railcar and double the weight measured by the one end. Placing the load cells and associated components at only one end of the rail car reduces costs, complexity and the chances of damage by approximately one half. 
         [0040]    A schematic illustrating the center plate load cell  62  and each of the two side bearing load cells  76  and  78  is provided in  FIG. 12 . A corresponding signal processing flow chart is illustrated in  FIG. 13 . While  FIGS. 12 and 13  address the embodiment of  FIGS. 2-7  and  9 , where the side hearings include double rollers, it is to be understood that alternative embodiments, such as those including the side bearings of  FIGS. 10 and 11 , and others, would feature a similar operation, 
         [0041]    In the schematic of  FIG. 12  and flow chart of  FIG. 13 , the side load bearing plate  76  of  FIG. 2  features the same construction as illustrated for side load bearing plate  78  of  FIGS. 7 and 9  and is equipped with strain gages  120   a - 120   d  ( FIG. 12 ). As described above, the side load bearing plate.  76  of  FIG. 2  is aligned with the double roller side load bearing  74  of  FIG. 3 . 
         [0042]    As noted with reference to  FIGS. 5 and 6 , each of the strain gage pairs  64   a - 64   d  of the center plate load cell  62  features first and second strain gages that are connected in series. As a result,: resistor  64   a  in  FIG. 12  actually represents two strain gages connected in series. The same applies for resistors  64   b,    64   c  and  64   d  in  FIG. 12 . The remaining resistors illustrated in  FIG. 12  ( 110   a - 110   d  and  120   a - 120   d ) each correspond to a single strain gage of the side bearing load, cells. 
         [0043]    As illustrated in  FIG. 12 , the strain gages of each load cell are connected in the form of a Wheatstone bridge circuit with the Wheatstone bridge circuits connected in parallel. The entire circuit is subject to an excitation voltage applied across positive and negative terminals  122  and  124 . The excitation voltage preferably comes from a battery mounted near the center plate load cell having a minimum voltage of 5 volts. Higher voltages are preferable, however, since the output of the circuit of  FIG. 12  is proportional to the input voltage. As an example only, resistors  110   a - 110   d  and resistors  120   a - 120   b  may each have a resistance of 2000 ohms. Resistors  64   a - 64   d  may each have a resistance of 4000 ohms. 
         [0044]    Each load cell is calibrated so that no unbalance in all of the Wheatstone bridge circuits of  FIG. 12  corresponds to an unloaded condition for the tank car. In other words, when the tank car is unloaded, current flow through resistors  110   a  and  110   c.  is the same as current flow through resistors  110   b  and  110   d , current flow through resistors  64   a  and  64   c  is the same as current flow through, resistors  64   b  and  64   d  and current flow through resistors  120   a  and  120   c  is the same as current flow through resistors  120   b  and  120   d.  This results in no signal at output terminals  126  and  128 . When each load cell is loaded, the resistances of the load cell&#39;s strain gages are altered due to strain in the load cell material (preferably steel) so that the corresponding Wheatstone bridge provides an analog signal. The load cells are calibrated so that, when the individual load cell signals are summed, they provide an output signal that corresponds to the weight of the tank car load. The summed output signal is provided, at output terminals  126  and  128 . When the tank car is in a non-tilting orientation, and ail of the load is concentrated on the center plate load cell  62 , the total output from terminals  126  and  128  will equal, the output, signal from the center plate load cell only (since the side bearing load cells are unloaded and thus produce no output signal). If the tank car is tilting, one of the side bearing load cells is loaded, and thus produces a corresponding signal. This signal is in added to the signal produced by the center plate load cell, which is also carrying some of the load, and the result is provided as a signal corresponding to the weight of the tank car load at output terminals  126  and  128 . 
         [0045]    In  FIG. 13 , the summed output signal of the load cells from output terminals  126  and  128  is represented as summing junction  130 . The summed output signal is provided to a signal conditioner  132 . Signal conditioner  132 , which may be a microprocessor, CPU, or any suitable electronic device known in the art, amplifies the summed signal from the load cells and generally filters the signal, removing high frequency noise, EMF interference, radio interference and the like as is known in the art. After being conditioned, the signal is applied to an analog-to-digital converter  134  which converts the summed analog output to a digital signal of sufficient resolution to indicate the weight of the tank car load. The digital signal may then be converted into telemetry by a transceiver  136  and transmitted to a receiver  137  for display on a digital indicator  139  which may be, for example, a computer display or workstation or the like. In addition, or alternatively, after the analog-to-digital converter, a digital-to-analog converter  140  may be used to provide an analog signal indicative of weight. This analog signal is converted to telemetry by a transceiver  142  and transmitted to a receiver  144  for viewing at analog display  146  which may be, for example, a computer display or workstation or the like. The conditioner, converter and transceiver components of  FIG. 3  should be attached to the tank car body bolster, on top of the tank, or in another -secure location. Options for communicating data from the load ceils to the conditioner and other components and for transmitting the telemetry will be described below. 
         [0046]    In an alternative embodiment, each load cell may have its own dedicated battery with the outputs still summed as illustrated in  FIGS. 12 and 13  and described above. Alternatively each load cell may feature a transmitter that transmits the output for each individual load cell to a central processing unit (such as conditioner  194  of  FIG. 1 , described below) that sums and conditions the signals as illustrated in  FIGS. 12 and 13  and described above, 
         [0047]    The present invention therefore recognizes that, while railcars are simple in design, they offer little in terms of protected areas to mount equipment. Furthermore, some major components, such as truck assemblies, are regularly removed, repaired and replaced. Most times they are replaced with different, remanufactured assemblies. Therefore, mounting any telemetry system components to the truck assembly, such as the load cells of the invention, is prohibitive. According to the embodiment of the present invention described above, the main body (non-truck or other removable railcar structures) is the preferred mounting location for load cells, transducers or sensors and related components. In other words, such devices are mounted on-board of the body of the railcar itself. 
         [0048]    An embodiment of the system for transmitting and receiving the data collected by weighing system described above is provided in  FIG. 14 . It should be noted that the term “remote” as used herein means any location that is not on-board the tank car. Such a location may be next to the tank car, such as in a rail yard, or a location that is cross country with respect to the location of the tank car. 
         [0049]    As illustrated in  FIG. 14 , the telemetry data from the tank car transceivers ( 136  and/or  142  in  FIG. 13 ) may be transmitted to a geo-stationary communications satellite  152  and/or a cellular system  154  to one or more remote receiving station(s)  156 . The receiving station transmits the data via the Internet  158  to a web based portal  160  which is accessible by a user via a workstation  162 , Data collected and transmitted can be from a stationary or moving railcar. Location data may be generated by Global Positioning System (GPS) satellite technology  164 . 
         [0050]    As illustrated, in  FIG. 1 , the railcar  20  may feature a number of additional transducers or sensors in addition to the weighing system load cells presented above with regard to  FIGS. 1-13 . As shown in  FIG. 1 , the transducers and sensors may include a temperature sensor  172 , for measuring both the temperature inside and outside of the tank car, a pressure sensor  174  for measuring the pressure within the tank car, a proximity switch  176  for the manway cover (to determine if it is open or closed), accelerometer (to record longitudinal, lateral and vertical forces) and motion sensors  178 , a vessel corrosion sensor  180 , a vapor and leak detection sensor  182 , a video, infrared and tampering sensor  184 , a handbrake and motion sensor  186 , a bearing condition sensor  188 , a valve operation sensor  192  and stress detection sensors  194 . As an example of use, the pressure sensor  174  and manway cover switch  176  of  FIG. 1  may alert personnel if a chemical tank car hatch cover or valve is opened. They also alert personnel if a box car, auto rack car or food/grain hopper cars has been opened or breached. 
         [0051]    Outputs from all of the transducers and sensors of the railcar of  FIG. 1  may be combined together to electronically represent the status, health or condition of any railcar. Each of the load cell, transducer and sensor devices on the railcar must communicate with the railcar signal conditioning and converter components  194  and transceiver  196  for transmission in accordance with  FIG. 14 . 
         [0052]    Getting the load cell, transducer and sensor data to the railcar signal conditioning and converter components  194  and transceiver  196  requires a communication means such as wire, fiber optic or wireless means. Some sensors require one of these methods for proper operation. but most sensors car be transmitted by any means. The most preferred method is wireless communication. This allows for ease of applications less labor and materials, is less conspicuous and eliminates the need to route and conceal cables/wires per AAR/FRA rail regulations. Suitable wireless technology is available from IONX LLC of West Chester, Pa. and makes the application of the load cells, transducers and sensors easier and cheaper. The wireless technology also provides superior communication from the sensors to the on-board conditioning and converter components and transceiver because each sensor is also a “smart” transceiver which when combined (networked) with other “smart” transceiver sensors, communicate (talk) to each other to identify and redirect the signal among the sensor network to provide the best transmission path, to minimize interference, maximize signal strength and demand the least amount of power. 
         [0053]    In an embodiment of the system, wireless sensors are set up in a wireless network with each sensor (node) having its own power source and transceiver. Nodes can communicate with other nodes and determine the best path of communication and minimize power requirements to reach the railcar conditioning and converter components and transceiver. 
         [0054]    The railcar conditioning and converter components and transceiver  194  and  196  of  FIG. 1  can be contained in a single housing that can also house generic sensors, such as ambient air temperature, humidity, acceleration, motion detection and other sensors not having location-specific requirements. 
         [0055]    There could be times when the railcar is on track with a slight elevation. This scenario may lead to inaccurate measurement at the one end of the railcar because of the weight shift away or towards that measured end of the car. To compensate for this uneven condition and allow for the proper weigh to be expressed, an electronic inclinometer may be added to detect the degree of inclination and through an algorithm within the signal processor, correct the signal output to represent the calculated right of the railcar. 
         [0056]    As noted previously, after sensor data is collected and conditioned, it sent to the transceiver  196  ( FIG. 1 ), which allows communication via satellite, cellular or RFID (not illustrated in  FIG. 14 ) to the receiving station  156  ( FIG. 14 ). The transceiver may contain the receiver/CPU and a GPS transponder which interacts with the U.S. Federal location satellites. This feature gives location, altitude, speed and other features offered by conventional GPS capabilities. The GPS and sensor data is then transmitted via a modem in the specified form of transmission along with the remaining railcar telemetry data. 
         [0057]    Once the condition or sensor data is received by the end user, the data can be further combined for additional value. In certain cases, the quality, value and safety of the shipped commodity, like chemicals in rail tank cars, is dependent on the way it is handled during shipment such as the rate of rise or fall, of temperature or pressure and the magnitude of impact forces during rail movement. 
         [0058]    The system may include redundancy sensors that ensure false positive reading do not occur. If a false positive were to happen, it may result in a team of safety or engineers to respond to an event in the middle of the country (at great expense) only to find the sensor was defective or not operating properly. An example of a redundancy sensor would be the hatch cover “open” sensor that detects tampering if the hatch cover is opened while the railcar is in transit. The hatch cover sensor available from by IONX LLC of West Chester, Pa., has a proximity switch that breaks the electrical contact when the hatch is opened, but it is also combined with an inclinometer sensor. If the proximity switch is opened (hatch open), but the inclinometer saws there is no change in the inclination, there will be a false positive alarm generated, prompting failure investigation before spending time and money to respond. 
         [0059]    A preferred method to add value to data generated by the system is by associating the location data (GPS) with information stored in the on-board memory of microprocessors in the on-board transceiver, in the case with chemical rail tank cars, the commodity description is loaded into the memory along with important HAZ MAT information and instruction to be used in the case of emergency or inspection. Several benefits are identified with this synergistic method. 
         [0060]    In the case of an accident, this system, can report to local state and federal authorities, first responder HAZ MAT teams and shippers the exact location, chemicals involved and the chemical safety and emergency requirements for this type of accident. By instant knowledge and monitoring of temperature and pressure change, the system can also alert agencies and local responders the severity of the chemical leak or leak rate of the accident which will determine their containment plan. 
         [0061]    The location data (GPS) can also provide authorities and shippers important national security information. It is known that the Department of Homeland Security (as demonstrated by their funding of the Freight Rail Security Program) is interested in the movement of TIB (Toxic Inhalation Hazards) chemicals such as Chlorine and Anhydrous Ammonium through HTUA (High Threat Urban Area) cities (there axe approximately 62 HTUA cities in the US; such as Chicago, Houston, Washington, etc.). When chemical tank cars are identified by this system of carrying TIH material, they can be monitored by the DHS to determine if these TIB cars are in a HTUA city during times of interest or emergency. This system along with the GPS provider or other providers can create what are called Gee-Fences which is a virtual (overlaid on a map) coordinate grid established around the known HTUA cities. With such a system, the tank car information along with its GPS capability can cause an alarm when the TIH tank car enters, exits or passes through the virtual Geo-Fence established for these cities. 
         [0062]    Another benefit of combining sensor data is to aid the monitoring by the security agencies (DHS, Fed, State) or shippers by identifying the condition or risk of the tank car transporting the TIH. During times of emergency, responders are aided by minimizing and simplifying their duties. A tank car that is identified as a TIH tank car but is empty poses little threat or risk and can be one less point of concentration or monitoring. By combining the car weighing system and the GPS data, the transmitted signal of an empty TIH car when placed on a map can produce, for example, a color green (empty) as opposed to a color red (loaded). 
         [0063]    There is much attention given to transporting TIH chemicals on the rail and public safety and ability to address an accident to protect the public is very important. Again, by combining several of the components of the system with information available on the internet and other electronic environments, public safety risk can be reduced. If an accident were to occur and/or a spill is detected by the system, notifications can be sent to authorities, shippers and responders the exact location of the accident. The message or notification could pull up Google Maps to identify location and contact phone numbers of public facilities, state/local buildings, schools, local hospitals or other places where people reside. Current weather maps could be pulled up to identify wind speed and direction to identity propagation of toxic cloud movement. 
         [0064]    Data received by sensors indicating the conditions in which railcars are handled and/or damaged is not only useful in identifying the where, how or who caused the damage, but real-time, in-service empirical data can be used by design engineers to redesign and potentially prevent damage in the future. 
         [0065]    Sensors such as crack detectors, strain gages, corrosion severity detectors and impact accelerometers can be used to trigger alarms indicating the rail car is about to incur, a critical failure and should be flagged and pulled out of service before an incident occurs. 
         [0066]    Accelerometer sensors can provide data that can be calculated into impact force by using the F=MA formula since the mass of the railcar and acceleration are known. Impact force is very useful when identifying aggressive train car handling that causes damage. This excessive force not only can damage the commodity being transported, but is a major cost for the repair and upkeep of railcars which are highly regulated and must pass physical inspection to insure safe operation. Knowing where, when and how these large impact forces occur will not only help in the resolution of legal and financial issues, the data can be used to prevent these excessive handling occurrences from happening, in the future. 
         [0067]    Once data is received by the end user (such as receiving station  156  or portal  160  in  FIG. 14 ), it is loaded into a website or computer based software program capable of sorting, running calculations, manipulating and displaying data in formats that benefit the end user. The preferred software is provided by IONX LLC of West Chester Pa., who has developed the website which can display and run calculations to provide the needed information for the end user. Third party software can be further used to run calculations or assimilate into other data formats for other uses of the data. For instance, the Federal Railway Association (FRA) and railroad industry has a railcar information system called UMLER (Universal Machine Language Equipment Register). This system keeps track of all pertinent information about that particular railcar such as inspection interval, accident history, repair history, type of car and commodity, features and equipment on the car and build date/manufacturer. Most all this data can be stored on an on-board microprocessor used by the system transceiver. This data can be sent directly to the UMLER data base eliminating the manual inputting of data and any delays or errors that may occur when done manually. 
         [0068]    The collective data provided by this system, in particular, the car commodity weight, condition, date/time and location is of particular value to the shipper and customer of the commodity being transported. Typically these aforementioned parameters are generated by various systems (some being hand written, or manual) and collected to make the sale and receipt of commodity inventory and transaction happen. With all these parameters provided in a single electronic format and signal, it can be streamed into a company&#39;s inventory management system or business system. The data from this system, containing product type, quantity, quality, location and date can drive inventory systems, invoicing, replenishment, order entry, performance histograms and other automated business systems to reduce cost, improve delivery, improve quality and reduce ship time. 
         [0069]    While the preferred embodiments of the invention have been shown and described, it will be apparent to those skilled in the art that changes and modifications may be made therein without departing from the spirit of the invention, the scope of which is defined by the appended claims.