JP3994558B2 - Monitoring and warning device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a surveillance warning device having a surveillance camera and various intrusion detection sensors.
[0002]
[Prior art]
FIG. 11 illustrates a conventional monitoring and warning device. In the figure, 1 is an infrared camera, 2 is a video signal output from the infrared camera 1, 3 is a monitor for displaying the video signal 2, 8 is an alarm device, 9 is the right end of the field of view of the infrared camera 1, and 10 is an infrared camera. 1 is the left edge of the visual field, 11 is a passage detection sensor, 12 is a light beam emitted from the passage detection sensor 11, 14 is a door, 17 is a first intruder, 18 is a second intruder, 42 is a guard, 48 is an open / close detection Sensors 49 are cables for transmitting output signals from various sensors, 50 is a concentrator, and 51 is an intrusion detection signal output by the concentrator 50.
[0003]
The infrared camera 1 is provided with a lens capable of shooting a wide range, and always takes a picture in a visual field from a preset visual field right end 9 to a visual field left end 10. The obtained video signal 2 is output to the monitor 3 and monitored by a monitor. Further, there are a passage detection sensor 11 and an open / close detection sensor 48 in the field of view of the infrared camera 1. The passage detection sensor 11 monitors the presence / absence of an intruder near the sensor, and the opening / closing detection sensor 48 monitors the presence / absence of opening / closing of the door 14. The security guard 42 performs patrol monitoring and enters the visual field of the infrared camera 1.
[0004]
The passage detection sensor 11 emits a light beam 12 such as an infrared ray or a laser, and detects the intruder using the reflection of the light beam 12 (or may detect the contact of the intruder). When the first intruder 17 crosses the light beam 12, the reflection of the light beam 12 does not reach the passage detection sensor 11, and the detection of the intruder is detected by the presence or absence of this reflection, and detection information is output to the cable 49. Similarly, the open / close detection sensor 48 detects that the door 14 has been opened by the second intruder 18 by a change in the conduction state between the door and the housing of the door (conduction of conduction) or the like. Detection is detected and detection information is output to the cable 49. Outputs from the passage detection sensor 11 and the open / close detection sensor 48 are input to the concentrator 50 via the cable 49, and the concentrator 50 analyzes the outputs of the sensors 11 and 48. The outputs of the sensors 11 and 48 include not only intruder detection information but also status signals indicating information on failure of the sensor itself. The concentrator 50 constantly monitors the output from each sensor 11, 48, and the output from each sensor 11, 48 indicates a waveform indicating detection information set in advance or a waveform indicating a failure of the sensor itself. Analyze identity. When the intruder detection is confirmed by this analysis, the concentrator 50 outputs an intrusion detection signal 51 to the alarm device 8, and the alarm device 8 issues an alarm in response to this.
[0005]
[Problems to be solved by the invention]
In the conventional apparatus shown in FIG. 11, cost and time are required for laying the cable 49, the price of the apparatus increases, and the re-laying of the cable is indispensable when adding the sensors 11 and 48. There was a problem that addition or movement of a sensor could not be performed.
[0006]
For example, when the monitoring target is the sea and the passage detection sensor 11 such as a magnetic sensor is attached to a moving object such as a buoy, it is necessary to hang the cable in the sea, which requires a lot of cable laying and maintenance costs. In addition, there was a problem that cables could be caught on ships.
[0007]
Further, the problem of cable laying costs, cable addition, and relocation can be eliminated by changing the data transmission method to a wireless method using radio waves, but the wireless transmission device attached to each sensor 11, 48 consumes a large amount of power. Since the number of parts is large, the parts cost and the failure frequency are high, and the cost increases as the number of sensors installed increases. Further, the wireless system has a problem that it is necessary to reset the radio frequency every time the sensors 11 and 48 are added in order to avoid wireless interference.
[0008]
Further, in the conventional apparatus shown in FIG. 11, when the guard 42 is caught by the infrared camera 1, there is a problem that even if it is viewed on the monitor, it cannot be easily distinguished whether it is an intruder or not.
[0009]
Furthermore, in the conventional apparatus shown in FIG. 11, for example, although the passage detection sensor 11 detects the first intruder 17, the first intruder 17 does not intentionally expose the skin and wears thick clothes. If the infrared camera 1 cannot be clearly captured due to wearing or the like, there is a problem that it is not possible to confirm whether or not there is a false alarm of the passage detection sensor 11.
[0010]
The present invention has been made to solve the above-described problems, eliminates the need for the addition or relocation of radio transmission devices and cables by radio waves, and makes it easy to distinguish between an observer and an intruder. The purpose is to obtain a monitoring and warning device capable of performing the above.
[0011]
[Means for Solving the Problems]
A monitoring alert device according to a first aspect of the present invention is an intrusion detection sensor for detecting an intruder, a sensor transmitter for transmitting an optical signal in accordance with a detection result of the intrusion detection sensor, a video of the monitoring area and a monitoring area. A camera that captures light emitted from the sensor transmitter, a brightness reading device that reads a change in brightness at the position of the sensor transmitter in an image captured by the camera, and a reading result of the brightness reading device And an alarm device that issues an alarm in response.
[0012]
According to a second aspect of the present invention, a monitoring alert device is configured to capture an intruder detection sensor that detects an intruder, a sensor transmitter that transmits and moves an optical signal according to a detection result of the intrusion detection sensor, and an image of a monitoring area. A sensor tracking device that tracks and shoots light emitted from the sensor transmitter in a monitoring area, and a luminance reading device that reads a luminance change of light from the sensor transmitter in an image obtained by the sensor tracking device And an alarm device that issues an alarm according to the reading result of the luminance reading device.
[0013]
A monitoring and alerting device according to a third aspect of the invention is an infrared light emitting device that emits an optical signal having a specific period into a monitoring area, reflects light emitted from the infrared light emitting device, and moves according to the opening and closing of the door. An open / close sensor, a camera that captures an image of the monitoring area and captures light reflected by the open / close sensor in the monitoring area, and a luminance reading device that reads a change in luminance at the position of the open / close sensor in the image captured by the camera And an alarm device that issues an alarm according to the reading result of the luminance reading device.
[0014]
A monitoring and alerting device according to a fourth invention is attached to a non-alarming target, an alarm canceling signal transmitting device that transmits an optical signal of a specific pattern, a camera that captures an image of the monitoring region and images the inside of the monitoring region, A high-luminance area detection device that detects light emitted from an alarm-cancellation signal transmission device from a high-luminance region in an image captured by the camera and detects the position thereof, and the alarm cancellation that is detected by the high-luminance region detection device A luminance reading device that reads a luminance change of light emitted from a signal transmission device, and a display device that displays information indicating a non-warning target in an image obtained by a camera according to a reading result of the luminance reading device It is.
[0015]
According to a fifth aspect of the present invention, in the first to fourth aspects of the invention, the monitoring and alerting apparatus includes a light irradiation device that is installed in the intrusion detection sensor and that irradiates light to a target detected by the intrusion detection sensor.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
FIG. 1 is a configuration diagram illustrating the first embodiment. In the figure, 4 is an in-gate luminance reading device, 5 is a received signal, 6 is a first decoding device, and 7 is an alarm signal. 13 is a passage detection sensor transmitter which is provided in the passage detection sensor 11 and transmits signal light by blinking of an infrared light emitter, 15 is an open / close sensor installed on the door 14, and 16 is an open / close sensor before the door 14 is opened. The position 15 and 16b represent the position of the open / close sensor 15 after the door 14 is opened. The other numbers in FIG. 1 are the same as in the conventional apparatus. Note that the passage detection sensor 11 and the open / close sensor 15 constitute an intrusion detection sensor, and one or a plurality of sensors 11 and 15 may be provided, but here, one case is illustrated.
FIG. 2 shows an image of the video signal 2 in the first embodiment. In the figure, 19 is an entire image of the video signal 2, 20 is a first measurement gate including an image of the passage detection sensor transmitter 13, and 21 is a second measurement gate including an image of the open / close sensor 15 before the door 14 is opened. It is.
FIG. 3 is a diagram showing transmission / reception timing. In the figure, reference numeral 22 denotes an image accumulation timing by the infrared camera 1, and accumulates photoelectrically converted electrons at the rising portion. Reference numeral 23 denotes a normal transmission signal from the passage detection sensor transmitter 13, reference numeral 24 denotes a transmission signal when an intruder is detected, and the rising portion is the timing at which infrared rays are output. 25 is a normal reception signal by the infrared camera 1, and 26 is a reception signal when an intruder is detected by the infrared camera 1.
[0017]
When the passage detection sensor 11 detects the first intruder 17 that crosses the light beam 12, the passage detection sensor 11 outputs detection information indicating detection of the intruder detection to the passage detection sensor transmitter 13 as a pulse signal having a predetermined period. The transmitter 13 converts this detection information into an optical signal generated by blinking infrared rays and transmits the optical signal. In addition, the passage detection sensor 11 periodically outputs a self-diagnosis signal indicating that it normally operates even when there is no intruder, and this is also transmitted as an infrared blinking signal. An example of the infrared blinking signal output from the passage detection sensor transmitter 13 is shown in FIG. The normal transmission signal 23 is a signal that is constantly transmitted, and the intruder detection transmission signal 24 is a signal that is transmitted for a predetermined time after the intruder is detected. Both are infrared blinking signals with a constant period, but their periods are different.
[0018]
In addition, the electric power supply of each sensor 11 and 15 is performed from the power supply outlet nearest to a sensor, or the battery mounted in the sensor.
[0019]
On the other hand, the infrared camera 1 captures an image within the field of view and outputs a video signal 2. The in-gate luminance reading device 4 reads the luminance change in the range surrounded by the first measurement gate 20 and the second measurement gate 21 set in advance, and the reading result of the infrared camera 1 stored in the internal memory. The received signal 5 is output together with the position information of the measurement gates 20 and 21 in the visual field. The measurement gates 20 and 21 are set corresponding to the positions of the sensors 11 and 15 when the sensors 11 and 15 are installed, or images of the sensors 11 and 15 are monitored by a monitor of the monitor 3. Can be appropriately reset to an arbitrary position within the field of view of the infrared camera 1 so that the signal enters the gates 20 and 21. In this setting, the position of the measurement gates 20 and 21 in the visual field of the infrared camera 1 and the range (size) of the gate are set by an input terminal such as a keyboard or a mouse according to the cursor or input command displayed on the monitor 3 by the setter. This input information is stored in the internal memory as position information.
The waveform of the reception signal 5 is the normal reception signal 25 when the passage detection sensor 11 detects nothing, and when the passage detection sensor 11 detects an intruder, The received signal 26 is obtained. This is a signal due to a beat due to a difference between the blinking period of infrared rays transmitted by the passage detection sensor transmitter 13 and the period of the image accumulation timing 22 by the infrared camera 1. As can be seen from the figure, when the passage detection sensor transmitter 13 is transmitting a normal signal and when a signal indicating that an intruder has been detected is transmitted, the beat frequency of the received signal is different. Can be distinguished.
The first decoding device 6 detects the beat frequency from the received signal 5, and outputs an alarm signal 7 when detecting that this is a signal that conveys detection of an intruder by the passage detection sensor 11. When the open / close sensor 15 moves from the position 16 before the door 14 is opened to the position 16b after the door 14 is opened, the beat signal cannot be detected because the infrared blinking signal in the second measurement gate 21 disappears. The first decoding device 6 detects this and outputs an alarm signal 7.
[0020]
According to the first embodiment, the infrared camera 1 installed for the purpose of monitoring is used not only for capturing images in the field of view but also as a device for receiving signals output from the sensors. When the detection sensor 11 or the open / close sensor 15 is installed, the signal cable is not required to be installed, the installation cost of the detection sensor is reduced, and the installation time is shortened. In addition, when a detection sensor is added or moved by reading the transmission signal from the image, the increase in the measurement gate or the movement of the measurement gate in the in-gate luminance reader can be displayed on the display screen or input terminal. Through the user interface, it is only necessary to add and change location information electronically. To add a cable, for example, to dig out an embedded cable pipe or to cut a conventional cable to increase the cable length. There is no need to perform extensive work such as re-tensioning the cable, which is effective in reducing costs. In addition, when an infrared transmitter is configured with a wireless transmitter, it is necessary to change the frequency or change the modulation code in order to avoid interference between multiple transmitters. In the case of transmission / reception, the transmitters can be exactly the same because the position information of the measurement gates 20 and 21 set corresponding to the position of the sensor can be distinguished, leading to lower costs. Furthermore, since the opening / closing of the door can be detected only by the change in the light emission position of the opening / closing sensor 15, a mechanism for detecting the opening / closing of the door by, for example, a change in the conduction state becomes unnecessary.
In the present embodiment, as shown in FIG. 3, the beat signal generated for detecting the blinking period of the infrared rays transmitted by the passage detection sensor transmitter 13 and the period of the image accumulation timing 22 by the infrared camera 1 are detected. With the configuration, the counter circuit scale in the passage detection sensor transmitter 13 can be reduced, and the cost can be reduced. In addition, when the transmission light of the passage detection sensor transmitter 13 is changed to visible light instead of infrared light and a system that receives the visible light instead of the infrared camera 1 is configured, the beat signal is detected as described above. By adopting such a configuration, fluctuations in the blinking cycle cannot be discriminated by human eyes, so that it is possible to prevent the intruder whose intrusion has been detected from being detected and escaped.
[0021]
Embodiment 2. FIG.
FIG. 4 is a block diagram showing the second embodiment. Reference numeral 27 denotes a sensor tracking device, 28 denotes tracking gate position information, 29 denotes a sensor luminance reading device, 30 denotes a buoy, and 31 denotes a buoy transmitter. The other numbers in FIG. 4 are the same as those in the first embodiment. FIG. 5 shows an image of the video signal 2 in Embodiment 2, and 32 is a tracking gate.
[0022]
The buoy 30 is provided with a passage detection sensor 11 such as a magnetic sensor. When a ship or the like approaches the buoy, the passage detection sensor 11 such as a magnetic sensor detects the detection and sends a detection signal to the buoy 30 installed above the buoy 30. Send to machine 31. The buoy transmitter 31 receives the detection signal, generates a signal due to blinking of infrared rays, and transmits the signal. The buoy 30 moves due to tides and waves, but is not swept away by a rope fixed in the sea. Since the field of view of the infrared camera 1 is set so as to cover the range in which the buoy 30 can move, the infrared light emitted by the buoy transmitter 31 is always photographed by the infrared camera 1, and its luminance is in the video signal 2 image. Is output in the form of a blinking point.
[0023]
The sensor tracking device 27 always tracks the infrared rays emitted from the buoy transmitter 31 in the video signal 2 image. Specifically, an image of the buoy transmitter 31 that is a high-luminance portion in the tracking gate 32 is detected, and the tracking gate is moved so that the center (the center of gravity of the image) is newly set as the center of the tracking gate. The new tracking gate is referred to as a tracking gate 32b. By this operation, the moved buoy transmitter 31b is positioned again at the center of the tracking gate 32b, and the tracking continues. Even when there are a plurality of buoy transmitters 31 to be tracked in the field of view of the infrared camera 1, the size of the tracking gate 32b is appropriately set based on the amount of movement predicted for each buoy transmitter 31. With this method, even when there are a plurality of buoy transmitters 31, it is not necessary to change the signal pattern output by each buoy transmitter. The sensor tracking device 27 sends the center position of the tracking gate to the sensor luminance reading device 29 as tracking gate position information 28.
[0024]
The sensor luminance reading device 29 reads the luminance at the center position of the tracking gate indicated by the tracking gate position information 28 in the video signal 2 and outputs the received signal 5 together with the tracking gate position information 28. Processing after the reception signal 5 is output is the same as in the first embodiment.
[0025]
According to the second embodiment, even when the detection sensor moves, the same effect as the effect of the first invention can be obtained, and further, since there is no signal cable, the signal cable is hooked on a ship or the like. Reliability is improved by not being cut.
[0026]
Embodiment 3 FIG.
FIG. 6 is a block diagram showing the third embodiment. 15b is an infrared reflecting plate, 16 is the position of the infrared reflecting plate 15b before the door is opened, and 16b is the position after the door 14 is opened. Reference numeral 33 denotes an infrared light emitting device. The other numbers in FIG. 6 are the same as those in the first embodiment.
[0027]
The infrared light emitting device 33 transmits an infrared blinking signal according to a specific pattern so that the infrared camera 1 is evenly distributed in the field of view. The infrared reflector 15 b is a corner reflector having a function of reflecting incident light only in the incident direction, and reflects an infrared signal transmitted from the infrared light emitting device 33 in the direction of the infrared camera 1. Others are the same as in the first embodiment, and the first decoding device 6 decodes the infrared signal emitted from the infrared light emitting device 33 and issues an alarm by detecting that the infrared reflector 15b has moved from 16 to 16b. Is.
[0028]
According to the third embodiment, the detection sensor does not require a power source and does not have an electric circuit, so there are few failures, and there is an effect of improving reliability and reducing cost.
[0029]
Embodiment 4 FIG.
FIG. 7 is a block diagram showing the fourth embodiment. 34 is a high luminance area detection device, 35 is high luminance position information, 36 is a luminance reading device, 37 is a position / reception signal, 38 is a second decoding device, 39 is an alarm release signal, 40 is a character display device, Reference numeral 41 denotes a video signal. Reference numeral 42 denotes a guard in the field of view of the infrared camera 1, and 43 denotes an alarm release signal transmitter attached to the left arm of the guard 42. The other numbers in FIG. 7 are the same as those in the first embodiment.
FIG. 8 shows an image of the video signal 2 in the fourth embodiment. 44 is a high-intensity area, and 45 is a superimposed character.
[0030]
Although the security guard 42 is not subject to security, when it enters the field of view of the infrared camera 1, it may be impossible to distinguish between the security guard and the intruder only by the infrared video displayed on the monitor 3. The alarm cancellation signal transmission device 43 transmits an infrared blinking signal according to a specific pattern. This blinking is received as a blinking point in an infrared image taken by the infrared camera 1. The high brightness area detecting device 34 detects an image of the alarm cancellation signal transmitting device 43 that is captured as an image having a predetermined or higher predetermined brightness, and outputs the center position of the image as high brightness position information 35. The luminance reading device 36 determines whether or not the luminance change at the position indicated by the high luminance position information 35 is the transmission signal of the alarm cancellation signal transmission device 43 from the video signal 2 image, and sets the peripheral region as the high luminance region 44. It is set and output as a position / reception signal 37 together with position information in the video. The second decoding device 38 outputs an alarm release signal 39 when it is determined that the position / reception signal 37 matches a specific pattern set in advance and is a transmission signal of the alarm release signal transmission device 43. The alarm release signal 39 includes position information in the video. The character display device 40 receives the alarm release signal 39 and superimposes the superimposed character 45 on the video signal 2 image. At this time, the superimposed character 45 is displayed in the vicinity of the alarm release signal transmission device 43 using the position information to indicate on the monitor that the guard 42 is out of the alert target.
[0031]
According to the fourth embodiment, when an object that is not a target of an alarm, such as a guard, enters the alarm range, this can be easily determined, and there is an effect of improving reliability by suppressing false alarms.
[0032]
Embodiment 5 FIG.
FIG. 9 is a block diagram showing the fifth embodiment. 46 is an infrared irradiation device. Other numbers in FIG. 9 are the same as those in the first embodiment. FIG. 10 shows an image of the video signal 2 in the fifth embodiment, and 47 is an infrared irradiation image.
[0033]
The infrared irradiation device 46 is installed in the passage detection sensor 11. When the passage detection sensor 11 detects the first intruder 17, the first intruder 17 is irradiated with infrared rays as shown in the infrared irradiation image 47, and the infrared image of the first intruder 17 is clearly displayed. To. Other processes are the same as those in the first embodiment.
[0034]
According to the fifth embodiment, when the passage detection sensor detects something, it becomes possible to clearly confirm what was captured by looking at the monitor, and reliability is improved. In order to obtain the same effect, the entire surveillance area can be illuminated with a powerful infrared light at all times or when an alarm occurs. However, installing a powerful infrared light is very expensive and consumes much power. Since it is large, the cost can be reduced compared to this.
[0035]
【The invention's effect】
According to the first invention, by using the camera installed for the purpose of monitoring as a device for receiving the transmission signal of the intrusion detection sensor, wiring of the signal cable becomes unnecessary in the installation of the intrusion detection sensor. The installation cost of the sensor is reduced and the installation time is shortened.
[0036]
According to the second invention, even when the intrusion detection sensor moves, the same effect as the effect in the first invention can be obtained, and furthermore, since there is no cable, the above sensor is attached to the maritime buoy. When installed, the cable is not caught by a ship or the like and is not cut and reliability is improved.
[0037]
According to the third aspect of the invention, the open / close sensor does not require a power source and does not have an electric circuit, so there are few failures, and it is effective in improving reliability and reducing costs.
[0038]
According to the fourth aspect of the present invention, even when a person who is not the subject of the alarm, such as a security guard, enters the alert range, it can be easily determined, and there is an effect of improving reliability by suppressing false alarms.
[0039]
According to the fifth invention, when the intrusion detection sensor detects something, it becomes possible to clearly confirm what was caught by looking at the monitor, and the reliability is improved. In addition, compared with the case where the entire monitoring area is illuminated with a powerful infrared light at all times or when an alarm is generated for the purpose of obtaining the same effect, a large amount of cost for installing a powerful infrared light is unnecessary and consumed. Since power can be reduced, costs can be reduced.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a configuration of a first embodiment of a monitoring and alerting device according to the present invention.
FIG. 2 is a diagram showing an example of a video signal image according to the first embodiment of the present invention.
FIG. 3 is a diagram showing an example of an infrared blink signal and a received signal according to the present invention.
FIG. 4 is a configuration diagram showing a configuration of a second embodiment of the monitoring and alerting device according to the present invention.
FIG. 5 is a diagram showing an example of a video signal image according to Embodiment 2 of the present invention;
FIG. 6 is a configuration diagram showing a configuration of a third embodiment of the monitoring and alerting device according to the present invention.
FIG. 7 is a configuration diagram showing a configuration of a fourth embodiment of the monitoring and alerting device according to the present invention.
FIG. 8 is a diagram showing an example of a video signal according to a fourth embodiment of the present invention.
FIG. 9 is a configuration diagram showing the configuration of a fifth embodiment of the monitoring and alerting device according to the present invention.
FIG. 10 is a diagram showing an example of a video signal image according to the fifth embodiment of the present invention;
FIG. 11 is a configuration diagram showing a configuration of a conventional monitoring and alerting device.
[Explanation of symbols]
1 Infrared camera, 2 video signal, 3 monitor, 4 in-gate luminance reader, 5 received signal, 6 first decoding device, 7 alarm signal, 8 alarm device, 9 right edge of visual field, 10 left edge of visual field, 11 passage detection Sensor, 12 rays, 13 passage detection sensor transmitter, 14 door, 15 open / close sensor, 15b corner reflector, 17 first intruder, 18 second intruder, 19 whole image, 20 first measurement gate, 21 first 2 measurement gates, 22 image accumulation timing by the infrared camera 1, 23 normal transmission signal, 24 intruder detection transmission signal, 25 infrared camera 1 normal reception signal, 26 infrared camera 1 intruder detection Received signal, 27 sensor tracking device, 28 tracking gate position information, 29 sensor luminance reading device, 30 buoy, 31 buoy transmitter, 32 tracking gate, 33 External light emitting device, 34 High brightness area detection device, 35 High brightness position information, 36 Brightness reading device, 37 Position / reception signal, 38 Second decoding device, 39 Alarm release signal, 40 character display device, 41 Video signal, 42 Security guard, 43 Alarm release signal transmission device, 44 High brightness area, 45 Superimposed characters, 46 Infrared irradiation device, 47 Infrared irradiation image.

Claims (5)

  An intrusion detection sensor that detects an intruder, a sensor transmitter that transmits an optical signal according to a detection result of the intrusion detection sensor, and a sensor transmitter that captures an image of the monitoring area and is included in the monitoring area. A camera that captures light, a luminance reading device that reads a luminance change at the position of a sensor transmitter in an image captured by the camera, and an alarm device that issues an alarm according to the reading result of the luminance reading device. Surveillance alert device.   From an intrusion detection sensor that detects an intruder, a sensor transmitter that transmits and moves an optical signal in accordance with a detection result of the intrusion detection sensor, and a sensor transmitter that captures an image of the monitoring area and has in the monitoring area A sensor tracking device that tracks and shoots the transmitted light, a luminance reading device that reads the luminance change of the light from the sensor transmitter in the image obtained by the sensor tracking device, and a reading result of the luminance reading device Surveillance warning device provided with a warning device that issues a warning in response. An infrared light emitting device that emits light signal of a specific period in the monitoring area, and close sensor to move the infrared light emitting device reflects light emitted from, and in accordance with the door opening and closing the by intruder intrusion monitoring a camera for capturing the light in which the opening and closing sensor is reflected to have the surveillance area as well as shooting the image of the region, and the brightness reading device for reading the luminance change in the position of the opening and closing sensor in a video image captured by the camera, the A monitoring and warning device comprising: an alarm device that issues an alarm according to a reading result of the luminance reading device. Attached to non-guard target, an alarm cancel signal transmitting apparatus for transmitting an optical signal of a specific pattern, as well as detecting the light emitted from the high luminance region in the image captured by the camera of the alarm cancel signal transmitting apparatus that In accordance with a reading result of the luminance reading device, a high luminance region detecting device for detecting a position, a luminance reading device for reading a luminance change of light emitted by the alarm release signal transmitting device detected by the high luminance region detecting device, and monitoring alert device of claim 1, characterized in that example Bei and a display device for displaying information indicating the non-guard target in the resulting image to the camera. Monitoring alert device according to claim 1 or 2, further comprising a light irradiation device that irradiates light to a subject to which the intrusion detection sensor is installed in the intrusion detection sensor detects.

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