Abstract:
A surveillance system is provided having a base unit for receiving digital video and audio transmissions from accessory units equipped with a camera having pan and tilt functions, a motion sensor, an intercom, infrared sensors and a doorbell button for contacting the interior of the dwelling a recording feature is provided to both automatically and on demand record video and audio transmissions received by the base unit from the accessory units.

Description:
CROSS REFERENCE TO RELATED APPLICATION  
       [0001]     This application claims priority under 35 U.S.C. 119(e) and 37 C.F.R. 1.78(a)(4) based upon copending U.S. Provisional Application Ser. No. 60/838,530 for Digital Video Surveillance System filed Aug. 11, 2006 and which is incorporated herein by reference. 
     
    
     FIELD OF THE INVENTION  
       [0002]     The present invention comprises a digital video surveillance system which may be used in residential or office applications to provide the observation of individuals appearing at an entrance of the premises. The present invention further provides the ability to link multiple accessory cameras with the control unit for surveillance of alternate locations on the exterior of the premises or within the premises.  
       BACKGROUND OF THE INVENTION  
       [0003]     The need for home security has become an increasing concern in the United States and elsewhere. The instances of undesirable individuals confronting home owners at the front door of the dwelling under a ruse or entering the property to attempt to break into the home are a constant concern. In addition, the increase of the number of homes of large size and the generally aging population of the United States increase the need for surveillance and communication systems for use in the home which allow individuals to screen visitors to the home and to determine at a distance whether an individual presenting themselves to the home is someone the home owner wishes to personally deal with or avoid.  
         [0004]     Heretofore, such surveillance systems have generally been large and cumbersome and required extensive wiring and cabling between the locations to be monitored and a central monitoring device. This level of complication has substantially reduced the convenience of employing such devices and limited the homes in which such devices could be employed to those in which either pre-planning during construction was involved for including such devices or extensive modification of the pre-existing home was made to accommodate such devices.  
         [0005]     A further limitation of such previous devices has been the limited ability to monitor the incoming signals from the various accessory devices from various locations of the home. Typically, one or possibly two monitoring stations would be provided and the home owner would find it necessary to be close enough to hear or see those devices when a visitor or intruder activated one of the cameras or monitoring devices. If the home owner was at a distance from the central monitoring device, the home owner may be unaware that an intruder or visitor was near the home where it may not be able to arrive at the vicinity of the central control device until after the visitor had left or the intruder initiated undesirable behavior.  
         [0006]     Therefore, it would be a great benefit to homeowners and other building dwellers if a low cost, easily installed, portable surveillance system was available which could transmit audio and video data to a base station without the need to install wired communication links between the base station and the auxiliary units.  
         [0007]     It would be a further benefit if the auxiliary units would automatically activate and begin transmitting signals to the base station upon the detection of a visitor or intruder within the vicinity of the base station.  
         [0008]     These features and more are included in the digital video surveillance system that is described hereinafter.  
       SUMMARY OF THE INVENTION  
       [0009]     The system or apparatus provides a home owner with an easily installed, wireless surveillance system. The system comprises multifunctional monitoring devices and includes infrared LEDs to permit low light video observation of visitors and includes standard light video observation. A motion detector is included for sensing the approach of an individual toward one of the motion sensors contained on the auxiliary units. And a microphone and intercom speakers are included for audio communications with the individuals. Signals from all of these multifunctional monitoring devices are transmitted from the accessory or auxiliary devices  14 ,  16  to base unit or central control unit  12 . The base unit is provided with a flash memory or on-board digital memory for user selectable recording of video transmissions from auxiliary devices  14 ,  16 . Base unit  12  also is provided with a communications socket such as a USB port to allow downloading of the recorded digital images from the memory to a computer.  
         [0010]     The central control unit  12  may be mounted in a fixed location or may be carried about the home by the individual during the performance of tasks or movement from one location to another. The central observation unit or base unit is in wireless communication with the accessory units and may be hard wired or battery operated to allow user selectability of mobile or fixed location use of the base unit. The sentry positioned and fixed locations and transmit data digitally to the central or base unit thereby eliminating the often poor grade or frequency transmission quality of analog signals used in past devices. In addition, the wireless nature of the present system avoids the need for preplanning of installation or extensive or expensive reconfiguration of existing homes to accommodate the surveillance.  
         [0011]     The foregoing and other objects are intended to be illustrative of the invention and are not meant in a limiting sense. Many possible embodiments of the invention may be made and will be readily evident upon a study of the following specification and accompanying drawings comprising a part thereof. Various features and subcombinations of invention may be employed without reference to other features and subcombinations. Other objects and advantages of this invention will become apparent from the following description taken in connection with the accompanying drawings, wherein is set forth by way of illustration and example, an embodiment of this invention.  
     
    
     DESCRIPTION OF THE DRAWINGS  
       [0012]     Preferred embodiments of the invention, illustrative of the best modes in which the applicant has contemplated applying the principles, are set forth in the following description and are shown in the drawings and are particularly and distinctly pointed out and set forth in the appended claims.  
         [0013]      FIG. 1  is a front and right side perspective view of the control unit  12  of the apparatus and which comprises a color LCD screen for viewing video transmission from each of the accessory cameras of the accessory units and front door units, and an intercom and a USB port, and power connection;  
         [0014]      FIG. 2  is a left side elevation view of the embodiment of  FIG. 1 ;  
         [0015]      FIG. 3  is a front elevation view of the embodiment of  FIG. 1 ;  
         [0016]      FIG. 4  is a rear elevation view of the embodiment of  FIG. 1 ;  
         [0017]      FIG. 5 a  right side elevation view of the embodiment of  FIG. 1 ;  
         [0018]      FIG. 6  is a front and right side perspective view of an accessory camera having a television camera with pan and tilt features, a motion sensor, an infrared sensor, an intercom and an RF transceiver for digital communication with the control unit of  FIG. 1 ;  
         [0019]      FIG. 7  is a front elevation view of the embodiment of  FIG. 6 ;  
         [0020]      FIG. 8  is a right side elevation view of the embodiment of  FIG. 6 ;  
         [0021]      FIG. 9  is a rear elevation view of the embodiment of  FIG. 6 ;  
         [0022]      FIG. 10  is a front and bottom and right side perspective view of the front door unit which also is equipped with a camera having pan and tilt functions, a motion sensor, an intercom, infrared sensors and a doorbell button which is hard wired to the existing door bell system, and a radio frequency transceiver for communication with the control unit;  
         [0023]      FIG. 11  is a top plan view of the embodiment of  FIG. 10 ; and  
         [0024]      FIG. 12  is a rear elevation view of the embodiment of  FIG. 1 ;  
     
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0025]     As required, detailed embodiments of the present inventions are disclosed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which may be embodied in various forms. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present invention in virtually any appropriately detailed structure.  
         [0026]     Referring now to  FIG. 1  the present invention of the digital video surveillance system  10  is shown comprised of four different units as exemplified in  FIGS. 1, 6 , and  10 . In summary the system is comprised of a control unit  12  ( FIG. 1 ), one or more doorbell units  14  ( FIG. 10 ), and accessory camera units of two different types that may be utilized with the control unit  12  of  FIG. 1 . The first type of accessory unit is a camera and intercom unit  16  as is shown in  FIGS. 6-9  and the second type of accessory unit is a camera only unit without an intercom feature.  
         [0027]     Each of the camera units  14 , 16  interconnects with control unit  12  and allows digital transmission of images to control unit  12 . Also incorporated in camera units  14 ,  16  are a motion sensor for detecting movement in the vicinity of the camera unit  14 , 16  an infrared sensor for surveillance of the area during the evening and night hours; and rechargeable batteries to avoid the need for hardwiring system on the premises. In addition each of accessory units  14 , 16  communicates with control unit  12  by wireless digital communications through radio frequency (rf) signals.  
         [0028]     In summary, front door unit  14  ( FIGS. 10-12 ) of the present invention  10  replaces the existing doorbells of homes and/or premises. The doorbell unit  14  relies upon the existing wires of the previously installed hardwire doorbell system to power the doorbell and camera unit  14  ( FIG. 10 ). The doorbell device  14  operates as a doorbell and also serves to transmit a video image of any individual approaching the doorbell unit  14  by the video camera  20  in the unit  14 . The camera  20  is activated either by activation of the motion sensor  22  or by the pressing of the doorbell  26  on the front door unit  14  ( FIG. 10 ).  
         [0029]     The front door unit  14  is preset to record in memory a digital image of an individual pressing the doorbell  26  or to record a video image when the front door unit  14  senses a movement within  3  meters of the unit  14  by motion sensor  22 . This information is wirelessly, digitally transmitted to control unit  12  which displays, in real time, digital images of the visitor outside the front door on LCD screen  28 . The front door unit  14  also can transmit in real time video transmission of the scene captured by the video camera  20  of unit  14  to control unit or hub unit  12 . Similarly, the accessory cameras  16  (with and without intercom) also can transmit for recording by control unit  12  digital pictures of the exterior scene when they detect movement by the motion sensor  22  within each accessory camera. Alternatively, each accessory unit  16  may be preset to display real time images of the camera  20  view on the display on the control unit  12 .  
         [0030]     The radio frequency wireless digital communication between control unit  12  and accessory units  14 ,  16  is at 2.4 GHz. This frequency is used for all communications between control unit  12  and the accessory devices  14 ,  16 . These communications include transmission of video, audio and data signals (command instructions) between the control unit  12  and the accessory units  14 ,  16 . It will be appreciated that all accessory devices as well as the control unit have the capacity to transmit and receive signals on the 2.4 GHz frequency and that an alternate frequency may be used.  
         [0031]     In operation, each of accessory units  14 ,  16  is in a standby mode until an event is detected that opens a communications link to control unit  12 . For example, if a camera is triggered by the motion sensor  22  or if the front door accessory unit is triggered by depressing of the doorbell button  26  particular accessory device  14 ,  16  being activated will open an communication link to the control unit  12 .  
         [0032]     The control unit  12  is the main operational device for this surveillance. All cameras of accessory devices  14 ,  16  communicate with the control unit  12  and each of the accessory devices  14 ,  16  must be registered with the control until  12  to operate with the particular control unit  12 . As previously stated a maximum of  8  accessory units  14 ,  16  can be registered with one control  12  unit for display of images from different locations. The control unit  12  is equipped with a color LCD screen  28  which may be of any convenient size and which is used to display the video transmissions received by control unit  12  from accessory units  14 ,  16 .  
         [0033]     Referring now to  FIGS. 1-5 , the features of the control unit  12  will be described in greater detail. Control unit  12  is the base unit which the homeowner can position in a fixed location or carry about for mobile contact with the surveillance system. Base unit  12  is provided with LCD video screen  28  which is used to view the video images from the accessory units. Audio communication between base unit  12  and accessory units  14 ,  16  is by way of microphone  30  which is located just above LCD screen  28  on base unit  12 . The received audio transmissions from base units  14 ,  16  are presented to the user through intercom speaker  32  and base unit  12 . It will be appreciated that the radio frequency digital transmissions between base unit  12  and accessory or units  14 ,  16  are received and transmitted via antenna  34  which is in connection with an internal radio frequency transmitter and radio frequency receiver within base unit  12  and within auxiliary units  14 ,  16 . Base unit  12  is provided with a pan and tilt control which allows movement of the video cameras which are contained within auxiliary units  14 ,  16 . In this manner, a user can view the video cameras contained within auxiliary units  14 ,  16  to achieve better viewing of the locations surrounding auxiliary units  14 ,  16 .  
         [0034]     In operation, the user will turn on the power of base unit  12  using power switch  38 . The user may then select a particular auxiliary unit  14 ,  16  to activate and receive transmissions from by selecting the desired auxiliary device or unit  14 ,  16  using device selector switches  40  on base unit  12 . By contrast, if a visitor or intruder approaches one of auxiliary units  14 ,  16 , that unit will begin transmitting information to base unit  12  in response to motion detectors  22  being activated. In such a case, the user need not select an auxiliary unit to activate using auxiliary device selector switch  40 .  
         [0035]     The additional controls located on base unit  12  include talk switch  42  to allow the user to transmit voice information through microphone  30  of base unit  12  on a selectable fashion thereby allowing the user to remain unnoticed by a visitor or intruder which might result from unwanted audio transmission from base unit  12 . Volume control  44  also is provided to allow the user to adjust the volume of audio transmissions. A video record switch, or “shutter” switch  46  is provided to allow a user to record a video image that is transmitted from one of auxiliary devices  14 ,  16 . Should the user then determine that the recorded video image is unnecessary, delete switch  48  can be employed to eliminate the captured image. Menu switch  50  is provided which allows the user to select the operational and programming menu available within base unit  12  and selector switch or entry switch  52  allows the user to select items displayed using menu switch  50 .  
         [0036]     Referring now to  FIG. 4 , battery cover  54  is located on the rear of base unit  12  which allows for a renewable power supply to portable base unit  12 .  
         [0037]     Referring now to  FIGS. 6-9 , the features of auxiliary unit  16  will be described. Auxiliary unit  16  is an auxiliary unit which does not include the doorbell feature found on auxiliary unit  14 . Auxiliary unit  16  is available in two different types, one type including a microphone  30  and intercom speaker  32  and a second type which does not include the microphone or intercom speaker feature.  
         [0038]     Referring particularly to  FIG. 6 , auxiliary device  16  is provided with motion sensor  22  which is always on when the system is on and serves to activate camera  20  when motion is detected in the vicinity of auxiliary unit  16  by motion sensor  22 . During periods of bad lighting or darkness, auxiliary unit  16  is provided with infrared LED lights  24  which allow imaging of objects by camera  20  during low light circumstances. It will be appreciated that operation of camera  20  has been previously described to the extent that the pan and tilt controls  36  of base unit  12  can be used to redirect the camera  20  to adjust the field of view to objects of interest.  
         [0039]     Referring now to  FIG. 6 , the rear of auxiliary unit  16  is shown which is provided with mounting plate  56  for mounting auxiliary unit  16  onto a surface. Battery cover  54  is also shown permitting replacement of the batteries powering auxiliary unit  16 .  
         [0040]     Referring now to  FIGS. 10-12 , the features of auxiliary unit  14  containing a doorbell switch will be discussed. In  FIG. 10 , the same features as have previously been discussed for auxiliary unit  16  may be found in auxiliary unit  14 . These features comprise motion sensor  22  which will activate auxiliary unit  14  upon the approach of an intruder or a visitor to the vicinity of auxiliary unit  14 . Alternatively, auxiliary unit  14  is activated when an individual presses doorbell button  26  which activates base unit  12  and in those instances in which auxiliary unit  14  is hard wired into the pre-existing doorbell wiring, auxiliary unit  14  will activate the dwelling doorbell ringer when switch  26  is depressed. Auxiliary unit  14  also is equipped with a video camera  20  which also is controlled by the pan and tilt controls  36  of base unit  12 . Again, in low lighting situations, infrared lights  24  are provided on auxiliary unit  14  to allow visualization of intruders or visitors during low lighting situations. Auxiliary unit  14  is provided with a microphone  30  and intercom speakers  32  to allow audio communication between base unit  12  and auxiliary  14 .  
         [0041]     Referring now to  FIG. 12 , the rear of auxiliary unit  14  is shown having mounting plate  56  attached thereto to allow convenient mounting of auxiliary unit  14  onto a surface. To allow the connection of auxiliary unit  14  to the pre-existing doorbell wiring of a dwelling, low voltage wires  58  are provided to permit convenient attachment of auxiliary unit  14  to the pre-existing doorbell wiring.  
         [0042]     In the foregoing description, certain terms have been used for brevity, clearness and understanding; but no unnecessary limitations are to be implied therefrom beyond the requirements of the prior art, because such terms are used for descriptive purposes and are intended to be broadly construed. Moreover, the description and illustration of the inventions is by way of example, and the scope of the inventions is not limited to the exact details shown or described.  
         [0043]     Certain changes may be made in embodying the above invention, and in the construction thereof, without departing from the spirit and scope of the invention. It is intended that all matter contained in the above description and shown in the accompanying drawings shall be interpreted as illustrative and not meant in a limiting sense.  
         [0044]     Having now described the features, discoveries and principles of the invention, the manner in which the inventive digital video surveillance system is constructed and used, the characteristics of the construction, and advantageous, new and useful results obtained; the new and useful structures, devices, elements, arrangements, parts and combinations, are set forth in the appended claims.  
         [0045]     It is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein described, and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween.