JP2005057588A - Monitoring camera system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a monitoring camera system which can unify a sensor system and a video system by superposing a video signal and a control signal on a sensor signal of a microwave sensor for detecting an obstacle to using a resultant signal as a radio wave and can record and preserve images picked up during interception of the radio wave in the case that the radio wave is intercepted by an intruder. <P>SOLUTION: In the monitoingr camera system for detecting the intruder by a monitoring camera and a sensor, an intruder detection area of the sensor is defined as an image pickup area of the monitoring camera, and a video signal picked up by the monitoring camera is included in the sensor signal of the sensor, and the video signal picked up by the monitoring camera for a prescribed period including an intruder detection time is stored when the intruder is detected. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a monitoring camera system including a sensor device that detects an intruder and a monitoring camera, and in particular, the sensor region of the sensor device is imaged and monitored by the monitoring camera, and an image captured when an abnormality occurs in the sensor region is recorded and stored. The present invention relates to a surveillance camera system that can be used.

Conventionally, surveillance camera systems linked to sensors detect intruders by sensors such as microwave sensors and infrared sensors, output alarm signals to the surveillance camera, and surveillance cameras that receive the alarm signal are based on the alarm. Thus, the sensor system and the monitoring camera (video) system operate and operate as independent systems, such that the sensor detection area is the monitoring target of the monitoring camera.
Moreover, there exist patent document 1 and patent document 2 as a related art which concerns, for example.

Japanese Patent Laid-Open No. 9-23418

JP 2000-135770 A

In the above prior art, a microwave sensor generally used for a sensor device is intended to detect only an obstacle, and therefore is not operated for transmission of image signals, control signals, and the like. There is.
In addition, it is necessary to install many devices such as a camera for photographing and a transmission device for transmitting photographed image data in the surveillance camera system. A wireless transmission system that uses wireless transmission for this transmission transmits images when radio waves are interrupted. There is a problem that signals and control signals cannot be transmitted, and monitoring (image display) is not performed during that time.

The present invention has been made in view of the above-described prior art, and superimposes a video signal and a control signal on a sensor signal of a microwave sensor that detects an obstacle and uses it as a wireless radio wave. It aims at providing the surveillance camera system which can unify.
The present invention has been made in view of the above prior art, and provides a surveillance camera system capable of recording and storing an image captured by a surveillance camera in the meantime even when a radio wave is blocked by an intruder. For the purpose.

In order to solve the above-mentioned conventional problems, the invention described in claim 1 is a surveillance camera system for detecting an intruder by a monitoring camera and a sensor, wherein an imaging range by the monitoring camera is used as an intruder detection area by the sensor, and When a sensor signal includes a video signal captured by the surveillance camera and an intruder is detected, the video signal captured by the surveillance camera for a predetermined period including the detected time point is stored. And

In order to solve the above-mentioned conventional problems, the invention described in claim 2 is a surveillance camera system for detecting an intruder, a means for transmitting a video signal of the surveillance camera included in a sensor signal for detecting an intruder, and the transmission And a means for displaying the video signal contained in the received sensor signal, and imaging the transmission path as a monitoring area of the monitoring camera, and transmitting the sensor signal when detecting an intruder When an abnormality is determined, a video signal for a predetermined period including a time point at which the transmission abnormality is imaged by the monitoring camera is stored.

In order to solve the above-mentioned conventional problems, the invention according to claim 3 is the surveillance camera system according to claim 2, wherein the video signal is displayed when the intruder is detected by blocking transmission. The means displays the video signal received before the transmission is cut off as a still image.

In order to solve the above-mentioned conventional problems, the invention described in claim 4 is directed to a camera terminal comprising: a surveillance camera that captures a video signal; and a sensor transmitter that transmits a signal including the video signal; A monitor camera system comprising a sensor receiving unit that receives a signal including a video signal and a monitor that displays a video signal included in the received signal, and the sensor receiving unit includes: The received signal is checked, the state of the transmission path is determined according to the check result, and a message to that effect is transmitted to the sensor transmission unit, and a video signal captured by the monitoring camera based on the transmitted check result The period is stored.

According to the present invention, by superimposing a video signal and a control signal on a sensor signal of a sensor such as a microwave that detects an obstacle and using it as a wireless radio wave, the sensor system and the video system can be unified. A camera system can be provided.
Further, according to the present invention, it is possible to provide a surveillance camera system that can record and save an image captured by a surveillance camera during transmission of a sensor area that is a radio wave due to an intruder. .

Embodiments of the present invention will be described.
FIG. 1 shows an example of a surveillance camera system according to an embodiment of the present invention.
This system is composed of a camera terminal side and a monitor side. On the camera terminal side, a camera platform 4, an ITV camera (monitoring camera) 5, an image recording device 6, a camera control unit 7, and a microwave detection sensor are provided. A transmission unit (sensor transmission unit) 1 is provided, and an image control unit 8, a monitor 9, an operating device 10, and a microwave detection sensor reception unit (sensor reception unit) 2 are provided on the monitor side.

Normally, a video signal captured by the monitoring camera 5 is transmitted as a microwave sensor signal from the sensor transmission unit 1, received by the sensor reception unit 2, and displayed as a live video on the monitor 9.
Here, for example, when an intruder (detected object 3) enters the transmission path, the reception sensitivity of the microwave sensor signal deteriorates or communication is interrupted. The sensor receiving unit 3 normally performs a transmission error check. The sensor receiving unit 2 returns a signal to that effect to the sensor transmitting unit 1 and returns an error detection signal when reception sensitivity deteriorates.
For transmission error check, a fixed-length control signal is transmitted between sensor transmission / reception units at a constant cycle.
The image recording device 6 can perform pre-alarm recording for recording an image before the error detection signal is generated. For example, a hard disk recorder (Hitachi DS-H300 equivalent) or the like is used.

FIG. 2 shows an example of an operation sequence on the camera terminal side according to the embodiment of the present invention.
This operation sequence is mainly controlled by the camera control unit 7. First, a signal transmitted from the sensor receiving unit 2 and received (that is, a signal indicating whether or not there is an error after parity check), Alternatively, it is always detected whether or not there is an intruder in the transmission path due to non-reception of the signal (step S21). When the intruder is detected (Y in step S22), an alarm (error detection signal or A signal indicating that the signal is cut off is output (step S23).
The image recording device 6 records (records and saves) a video several seconds to several minutes before the time when the alarm occurred (step S24). Even during the signal cut-off period, the camera control unit 7 continues to detect the presence or absence of the transmission signal (reply signal) from the sensor receiving unit 2 (step S25), and outputs an alarm until the transmission cut-off is recovered and the error detection signal disappears. (Step S26) The image recording apparatus 6 continues recording and storage, and the above operation is repeated every time an error or signal interruption occurs.

FIG. 3 shows an example of an operation sequence on the monitor side according to the embodiment of the present invention.
This operation sequence is mainly controlled by the image control unit 8. First, the sensor reception unit 2 receives the sensor signal (the video signal is superimposed) transmitted from the sensor transmission unit 1, and receives the video signal. It is taken out and output and displayed on the monitor 9 (step S31), and error detection such as parity check is performed, or the sensor signal itself is not received (step S32), so that signal errors and interruptions are always made. And a check result is transmitted (returned to the sensor transmitter 1) (step S33).
In addition, a predetermined number of frames of image data (still image data) are always stored in the memory. When the signal blockage due to the intruder is detected (step S34), the normal frame immediately before the detection is output to the monitor and displayed as a still image (step S35).

Even during the signal cut-off period, the image control unit 8 continues to detect transmission errors due to the transmission check and communication cut-off, and after the communication cut-off disappears and the transmission is restored, the still image output is stopped and transmitted from the sensor transmitter 1. Output video signal (live video).
Note that the still image frame displayed when the communication is cut off is recorded as an alarm in the image recording device 6, and various operations of the image recording device 6 such as displaying an alarm list and searching for images are performed by operating the operation unit 10. Necessary image display can be reproduced.
In addition, when an error detection signal or communication interruption is detected, an image taken by the monitoring camera 5 during an error occurrence period or communication interruption period (that is, an intruder is intruding into the detection area). Can be transmitted to the monitor side by effectively superimposing it on the sensor signal after the interruption is recovered, and the monitor can be effectively notified of the intruder and transmit the image.

FIG. 4 is an example showing waveforms at the time of error detection and communication cut-off detection according to the embodiment of the present invention. FIG. 4A is a waveform in which an error rate is detected by the sensor receiver 2, and FIG. FIG. 4C shows the waveform of the video recorded by the image recording device 6, and FIG. 4D shows the video signal input to the image control unit 8. FIG. 4E shows a waveform for outputting and displaying the video signal of FIG. 4D on a monitor. The horizontal axis of (a) to (e) represents time.
FIG. 4A shows a case where the sensor receiving unit 2 receives a sensor signal from the sensor transmitting unit 1 and performs an error check such as a parity check of the received signal and exceeds a threshold that is arbitrarily set according to the degree of error. It is detected as an error, or signal interruption is detected when there is no received signal. In other words, when there is no intruder, there is nothing to block the transmission path and the error rate is low, but when there is an intruder, the transmission path is blocked and the error rate is high or the transmission path is completely closed. If it is interrupted, communication will be interrupted.

FIG. 4B shows that when the error (error rate) exceeds an arbitrarily set threshold value or when the signal is cut off, it is determined that an error has occurred. The fact is output, and the fact is sent to the sensor transmitter 1 (an error is returned). However, if the transmission path is completely blocked by the intruder, a reply indicating that the error has occurred will not reach the sensor transmitter 1 (not received).

On the other hand, the surveillance camera 5 continues to capture the transmission path. The captured video signal is recorded in the image recording device 6 (HDR), and the recorded video signal is discarded after a predetermined time has elapsed. However, when the above-mentioned error signal is received or the signal is cut off, The record is saved for a period from the time before the arbitrarily set time to the time after the arbitrarily set time when normal.
That is, as shown in FIG. 4 (c), pre-alarm recording and epi-alarm recording are performed by recording and storing the video from before the error signal is returned to the normal state.

FIG. 4D shows the waveform of the video signal received by the image control unit 8 via the sensor receiving unit 2, in a state where the signal is not cut off (a state where the signal is normally received and an error, but the video signal) In the state of being received), this indicates that the video signal is output to the monitor as a live video.

FIG. 4 (e) shows a waveform in which the video signal according to FIG. 4 (d) is output and displayed on the monitor. During the period when the live video is received, the live video is displayed and the communication is cut off and the live video is received. The period during which no image is displayed indicates that the still image of the image immediately before being blocked is continuously displayed.
Note that the communication cut-off period here is a period during which the transmission path shown in FIG. 4A is completely cut off, but the error rate becomes higher than the arbitrarily set threshold value, and error correction can be performed. If a second threshold value is set that exceeds the level where the image cannot be recognized when the image is displayed, and the threshold value is exceeded, it can be determined that the transmission path is completely blocked (not shown).

FIG. 5 is an example showing a display screen of the monitor 9 according to the embodiment of the present invention.
FIG. 4E shows an example of screen shift when the monitor of FIG. 4E is output and displayed, but information indicating that the video is a live video like “screen G51” when “normal” in FIG. 4A. At the same time, a video signal captured by the surveillance camera is displayed.
Then, in the case of indicating that the error exceeds an arbitrarily set threshold, it is determined that there is an intruder on the transmission path, and the fact that there is an intruder in addition to the live video as shown in the screen G52. A video signal is displayed along with the information.
When the transmission path is completely blocked (or when it is determined that the transmission path is completely blocked), the video immediately before being blocked is displayed as a still image as shown in the screen G53, and a still image is displayed. Display that there is something. Further, the time when the still image is displayed is counted and displayed, and the image code of the still image is displayed.
When the transmission path is not completely cut off (that is, the state after returning from the cut off), the display is switched to the live video as shown in the screen G54, and it is restored that it is a live video and has been restored. The total time in the cut-off state and the information indicating the image code in which the image during the cut-off period is stored are displayed for an arbitrarily set time, and the screen G51 is displayed.

Thus, for example, when an intruder enters, if the error of the signal transmitted by the intruder increases first, the normal live image on the screen G51 becomes the live image on the screen G52 in which the intruder is detected, and the intruder is transmitted. When the path is completely blocked, the video signal immediately before blocking the screen G53 is displayed as a still image, and when the intruder moves and does not completely block the transmission path, there is a lot of error, but it has returned from blocking. A live video indicating this is displayed for a certain period of time like a screen G54.
When the transmission path is suddenly cut off from the normal state in FIG. 4A, the display screen may be switched from the screen G51 to the screen G53.
Further, in the display state of the screen G52, when the live video state is maintained without the transmission path being cut off and the normal state of FIG. 4A is restored as it is, the display screen is changed from the screen G52 to the screen G54. There are also cases where switching occurs.

FIG. 7 is an example of an operation flowchart on the camera terminal side according to the embodiment of the present invention, and is a detailed example including the operation sequence of FIG. 2 described above.
The camera control unit 7 monitors whether a reply signal is received from the sensor receiving unit 2 (step S201).
If there is a reply (Y in step S201), the signal is a signal that the sensor reception unit 2 has checked for parity and determined as an error, a signal indicating that communication has been disconnected, or another signal. The following steps are selected depending on which signal is a signal (including a normal control signal or the like) indicating that the monitor side is normal (step S202).
If there is no reply in step S201, or if an error detection signal is received in step S202, it is determined that there is an intruder and the photographed image is stored (step S206).

At that time, first, it is confirmed whether or not the flag is set (step S203). Since the flag is not set when the error detection signal is first received or when there is no first reply (N in step S203), an error is detected. Saved in the image recording device 6 from an image taken before the detection signal reception time (pre-error frame), or from an image taken before the point when no reply is made (pre-blocking frame). An arbitrary code “image code DX” is assigned to the image to be stored (step S204). Then, a flag is set (step S205).
Since the image is continuously stored for a period during which it is determined that there is an intruder (that is, N in step S201 or an error in step S202), one code “image code DX” is assigned to a series of captured videos. The Rukoto.

When a normal signal is received in step S202, the flag is not normally set (N in step S211), and the captured image is discarded after a predetermined time has elapsed (step S214).

However, in the state where the flag is set (Y in step S211), the flag is set in the above-described step S205, and the state where the error detection signal has been received or no reply has been continued until then. It indicates that the state is normal, that is, the detection of the intruder has ended (from the state with the intruder to the state without the intruder).
Then, the flag is reset (step S212), and a setting is made so as to save the photographed image until a predetermined time has elapsed (step S213).
When an intruder is detected by such an operation, an image of a period from a certain time before detection to a certain time after the detection is saved is stored, indicating that the image is one moving image. An image code will be given.

When the signal for releasing the interruption is received in step S202, the image code SX included in the signal is stored (step S221). Receiving this blocking release signal indicates that the transmission path has been blocked by the absence of a reply in step S201 (N in step S201). It is a state that has been made.
Any time point in the moving image is a time point just before the communication is cut off, and a code (image code SX) is given to the time point to specify the still image frame immediately before the cut-off.

That is, when an intruder is detected, an image for a period from a certain time before the detection to a certain time after the detection ends is stored, and an image code DX indicating that the image is an image of one moving image is stored. When communication is interrupted in the moving image, the still image immediately before the interruption is assigned as the image code SX.

In the case of N in step S201 in FIG. 7 (a state where no reply signal is received) or an error in step S202 (the received signal is an error signal), the alarm signal in step S23 in FIG. It is equivalent to output.

FIG. 8 is an example of an operation flowchart on the monitor side according to the embodiment of the present invention, and is a detailed example including the operation sequence of FIG. 3 described above.
The sensor receiver 2 receives the sensor signal (the video signal is superimposed) transmitted from the sensor transmitter 1 (Y in step S301), detects an error such as a parity check (step S303), and there is no error. If it is in the state (N in step S305), the live video is displayed on the monitor 9 (step S308). This display state is the image G51 shown in FIG.
Then, the image code SX is assigned to the video currently displayed (step S309).
This series of operations is repeatedly performed in a state where there is no intruder and sensor reception continues normally, and the image code SX is reset in step S302, so that the image code is always assigned to the latest image. Will be.

Here, when the live video being displayed is a continuous image of still image frames, an image code SX is assigned to at least one of the still image frames. When the displayed video is a moving image, an image of an arbitrary fixed time unit of the displayed moving image is set as one frame, and an image code SX is assigned to this one frame. Note that the image frame to which the image code SX is assigned is temporarily stored until the image code is assigned to the next image frame.

When an error is detected in the error detection such as the parity check in step S303 described above (Y in step S305), an error detection signal is transmitted from the sensor receiver 2 to the monitoring camera side (step S306), and the display screen is displayed. A message “There is an intruder” is superimposed (step S307), and a live video is displayed (step S308). This display state is the image G52 shown in FIG.

On the other hand, when the sensor signal transmitted from the sensor transmitter 1 is not received by the sensor receiver 2 (N in step S301), that is, when the transmission path is blocked by an intruder or the like and no signal is received (N in step S301). (Signal cut-off Y)), the image frame provided with the image code in the step S309 is read (step S311) and displayed on the monitor 9 (step S312). In this display, information indicating that the displayed image is not a live image but a still image frame and that the signal is blocked by an intruder or the like is superimposed on the display screen.

Further, the image code SX of the displayed image frame is stored and stored, and the time of this display is counted by a timer (step S313), so that it is possible to grasp how long the transmission path has been blocked. it can. The image code SX and the time during which the image code is displayed (that is, the time during which the image code is displayed) can be displayed in a superimposed manner, and the display state is the image G53 shown in FIG. 5 described above.
Then, a flag is set (step S314), and the process returns to step S301.

While the state in which no signal is received (N in step S301 (Y in signal cutoff)) continues, still image display is continued, the time is counted, and the flag setting is continued. When a signal is received (Y in step S301), after passing through step S303, a series of operations (Y in step S304, step S321, step S322, step S323) are performed on the live video. Is displayed.

The series of operations in the state where the flag is set is the display state of the image G54 shown in FIG. 5 described above, and the time during which the still image is displayed for a certain time after the display is switched from the still image to the live image. And the image code of the still image are superimposed and displayed (step S321), the flag is reset (step S322), and the signal indicating that the block is released is displayed on the monitoring camera side including the image code SX stored and saved in step S313. Transmit (step S323).

Note that “D” in the image code indicates a moving image, “S” indicates a still image, and “X” is a unique character string given arbitrarily. These image codes are stored and stored linked to various information such as the saved date and time and the monitoring area of the monitoring camera, or are arbitrarily given the various information such as the saved date and time and the monitoring area of the monitoring camera. By including it in a unique character string, the stored image can be reproduced and analyzed.

FIG. 6 shows a second example of the surveillance camera system according to the embodiment of the present invention, which is an expanded system of the example of the surveillance camera system shown in FIG.
In this system, a plurality of detection areas (P1, P2, P3) are set, and each of the sensor transmission unit and the sensor reception unit detects these detection areas. Therefore, the same number of sensor transmitters and sensor receivers as the number of detection areas are required.
And between each detection area, the signal relay parts 601 and 602 by wired connection or wireless connection are arrange | positioned.
Further, the pan head 4 ′ is adjusted in a direction to shoot each detection area by turning the surveillance camera 5 mounted (rotation, or changing the vertical angle, or a combination of rotation and vertical angle change) based on the control signal. The
In addition, on the display screen of the monitor 9, information on which detection area is currently being displayed is superimposed on the image signal and displayed.

In the detection area P1, the sensor transmission unit 611 and the sensor reception unit 621 communicate with each other, and the video signal captured by the surveillance camera is superimposed. The signal relay unit 601 extracts a video signal from the sensor reception unit 621 and transmits the video signal to the sensor transmission unit 612. The sensor transmission unit 612 superimposes the received video signal and transmits the sensor signal to the sensor reception unit 622. The same signal is transferred to the sensor receiving unit 623, and the video signal is displayed on the monitor 9 in the same manner as the embodiment of FIG.

On the other hand, each sensor receiving unit (623, 622, 621) checks the received sensor signal (or checks whether the communication is interrupted so that the sensor signal is not received), and sends it to each sensor transmitting unit (613, 612, 611). The check result is returned (not returned when communication is cut off).
In the detection area P3, the sensor transmission unit 613 and the sensor reception unit 623 communicate with each other, the return signal of the sensor reception unit 623 is returned to the sensor transmission unit 613, and then the sensor transmission unit 613 is uniquely set to itself. Information is added to the signal relay unit 602. Then, the signal relay unit 602 passes the return signal from the sensor receiving unit 623 to which the unique information of the sensor transmitting unit 613 is added to the sensor receiving unit 622. The sensor receiving unit 622 returns the return signal and the check result of the sensor signal received from the sensor transmitting unit 612 to the sensor transmitting unit 612 as a return signal. Similar signal transfer is performed up to the sensor transmission unit 611, and the presence or absence of an intruder in each detection area can be confirmed on the camera terminal side in the same manner as the embodiment of FIG.
In addition, when any one of the detection areas is disconnected, there is no result of the detection check and only the unique information of the sensor transmission unit is returned as a reply signal, so it is possible to determine which detection area has an intruder.

For example, first, a case where there is an intruder in the detection area P2 in a state where the monitoring camera 5 is photographing the detection area P1 will be described.
When the sensor receiver 622 detects an intruder, the sensor receiver 622 returns a detection result to the sensor transmitter 612. (This returned signal includes the check result of the detection area P3 and the unique information of the sensor transmitter 613.)
Then, the unique information of the sensor transmission unit 612 is added to the returned signal, passed to the sensor reception unit 621 via the signal relay unit 601, and further added to the return signal of the check result of the detection area P1. A reply is sent to the transmission unit 611.
The camera control unit 7 can determine the detection result of the intruder in each detection area based on the unique information of each sensor transmission unit. A signal for changing the position is transmitted to the base 4 ′, the monitor camera 5 is turned so that the monitoring area of the monitoring camera 5 becomes the detection area P2, and the image of the detection area P2 is stored and saved.
Regarding the position change of the monitoring camera 5 due to the turning of the camera platform 4 ′, preset positions are set in advance so that each detection area is set as a monitoring area.

Further, for example, when a communication interruption occurs in the detection area P3, the sensor transmission unit 613 does not receive a reply signal from the sensor reception unit 623. The sensor transmission unit 613 passes only its own unique information to the sensor reception unit 622 via the signal relay unit 602, and the camera terminal side receives it together with a return signal of each detection area.
Then, since the detection result of the detection area P3 is not included, it is determined that the communication is interrupted by the intruder, and control is performed so that the monitoring camera 5 is turned and the detection area P3 is photographed.
In addition, since the monitor 9 has a signal interruption, the live image of the detection area P1 that has been captured until then is not displayed, so a still image immediately before the communication interruption or a previously captured image is stored. A still image in the detection area P3 is displayed.

In addition, it can be set as the structure provided with the pair of a sensor transmission part and a sensor receiving part with 2 opposing with respect to one detection area. For example, the video signal of the surveillance camera is superimposed on the sensor signal transmitted from the camera terminal side to the monitor side, and the camera platform 4 ′ or the image recording device 6 is included in the sensor signal transmitted from the monitor side to the camera terminal side. In other words, the sensor transmission unit and the sensor reception unit are provided in two opposite directions as two-way control signals.
In such a case, the load of the signal to be superimposed on each sensor signal is reduced, and it becomes easy to perform various controls on the monitoring camera side by operating the operation device 10, and communication is cut off in both directions of one detection area. If one of the two directions is cut off and the communication is cut off, the signal communicated on the other side can be supplemented.

As described above in detail, in the embodiment of the present invention, the intruder detection by the sensor and the surveillance camera are shared, and the surveillance camera system is configured by combining the imaging range by the surveillance camera and the intruder detection area by the sensor. It is.
Then, by utilizing the fact that the video signal superimposed on the sensor signal is blocked by the intruding object, the image frame immediately before the blocking can be output and displayed as a still image on the monitor. The image during the interruption can be stored in the memory, read out after the interruption is recovered, and displayed on the monitor.

In such a surveillance camera system according to the embodiment of the present invention, a video signal and a control signal are used as the same frequency band for a microwave signal used for fault detection, and accordingly, a microwave sensor and a monitor used for fault detection are used. Using a camera, an object that has entered the microwave propagation area is detected by signal interruption, the image before interruption is stored in memory, and after recovery from interruption, a surveillance camera system is detected that detects intruders that transmit memory images. Therefore, it is suitable for installation in places where wireless transmission is indispensable, especially in less popular places and in mountainous areas where infrastructure development is not progressing, and maintenance work can also be done because fewer equipment can be installed. Etc. are also effective.

Therefore, according to the embodiment of the present invention, by superimposing and transmitting the image signal on the transmission signal of the sensor using the microwave such as circularly polarized wave used for fault detection, in conjunction with the sensor function, It is possible to issue a fault due to an intruder, display an alarm image of an image, record an alarm, etc., and display the video immediately before the transmission is interrupted on the monitor. You can check the video of the period.
Furthermore, by using a plurality of detection sensors, it is possible to transmit an image over a long distance, and to perform intrusion detection and failure detection at a plurality of positions.

The Example of the surveillance camera system which is embodiment of this invention. The example of the operation | movement sequence by the side of the camera terminal which is embodiment of this invention. The example of the operation sequence by the side of the monitor which is an embodiment of the invention. It is an Example which shows each waveform at the time of the error detection which is embodiment of this invention, and a communication interruption | blocking detection, (a) is a waveform which detected the error rate by the sensor receiver 2, (b) is based on (a). (C) is a waveform of a video recorded by the image recording device 6, (d) is a waveform of a video signal by the image control unit 8, and (e) is a monitor of the video signal by (d). Waveform to be output and displayed. The Example which shows the display screen of the monitor 9 which is embodiment of this invention. The 2nd Example of the surveillance camera system which is embodiment of this invention. The example of the operation | movement flowchart (detail) by the side of the camera terminal which is embodiment of this invention. The example of the operation | movement flowchart (detail) by the side of the monitor which is embodiment of this invention.

Explanation of symbols

1: sensor transmitter, 2: sensor receiver, 3: detected object (intruder), 4, 4 ′: pan head,
5: surveillance camera, 6: image recording device (HDR), 7: camera control unit, 8: image control unit,
9: Monitor, 10: Controller
611, 612, 613: sensor transmission unit, 621, 622, 623: sensor reception unit,
601, 602: Signal relay unit, P1, P2, P3: Detection area

Claims (4)

In a surveillance camera system that detects intruders with surveillance cameras and sensors,
The imaging range by the surveillance camera is the intruder detection area by the sensor,
Including the video signal captured by the monitoring camera in the sensor signal of the sensor,
A surveillance camera system for storing a video signal captured by the surveillance camera for a predetermined period including the detected time when an intruder is detected. In surveillance camera systems that detect intruders,
Means for transmitting a video signal of the surveillance camera included in a sensor signal for detecting an intruder;
Means for receiving the transmitted sensor signal and displaying the video signal included therein,
Imaging the transmission path as a monitoring area of the monitoring camera,
When the transmission abnormality associated with the detection of an intruder is detected in the sensor signal, a video signal for a predetermined period including a time point when the transmission abnormality is determined by the monitoring camera is stored. Surveillance camera system. The surveillance camera system according to claim 2,
A surveillance camera system, wherein when the intruder is detected by blocking transmission, the means for displaying the video signal displays the received video signal as a still image before blocking the transmission. A camera terminal that includes a monitoring camera that captures a video signal and a sensor transmission unit that transmits a signal including the video signal;
A monitor comprising: a sensor receiving unit that receives a signal including the transmitted video signal; and a monitor that displays the video signal included in the received signal;
A surveillance camera system comprising:
The sensor reception unit checks the received signal, determines the state of the transmission path according to the check result, and transmits that fact to the sensor transmission unit,
A surveillance camera system for storing a video signal captured by the surveillance camera based on the transmitted check result for a predetermined period.

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