JPH0855286A - Object detecting device and object detection system using same - Google Patents

Abstract

PURPOSE:To provide the device which can distinctively detect a suspicious object without using any special type video camera. CONSTITUTION:This system is equipped with plural sensor poles which are installed at certain intervals and each provided with an infrared light source 2, an infrared sensor 3, a video camera 4, and a background panel 5 which is lighted by a specific light source with visible light, infrared light, etc.; and the infrared rays emitted by the infrared light source 2 of the 1st sensor pole are photodetected by the infrared sensor 3 of the 2nd sensor pole 3 and when the infrared rays from the 1st sensor pole which are monitored by the infrared sensor 3 of the 2nd sensor pole are cut off, the background panel 5 of the 2nd sensor pole are lighted and a means which picks up an image of the 1st sensor pole by the video camera 4 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting an illegal intruder into a facility or the like.

[0002]

2. Description of the Related Art Fences and fences are installed around factories, power companies' power plants, substations, etc. to protect important equipment from illegal intruders. Have been set up in various places and are being centrally monitored in security rooms.

[0003]

The monitoring by the video camera is performed especially at night. However, in the case of outdoor installation, the brightness difference between the suspicious object and the background is not clear unless the night illumination is provided, and the monitor TV Therefore, the image of the suspicious object cannot be clearly discriminated. One type of TV camera that does not require lighting or that may have low illumination is a super-sensitive night-vision camera, but this is expensive, so it is difficult to use it for a surveillance system that uses many units. is there.

The problem to be solved by the present invention is to provide an apparatus capable of clearly detecting a suspicious object without using a special type of video camera.

[0005]

In order to solve the above-mentioned problems, an object detecting device of the present invention comprises an infrared light source for emitting infrared rays to an infrared sensor provided on another sensor pole in a sensor pole, An infrared sensor that receives infrared rays emitted from an infrared light source provided on another sensor pole, a video camera that includes the other sensor pole in the imaging area, and an imaging area of the video camera that is installed on the other sensor pole. A background panel, which is background light and is illuminated by a predetermined light source, is installed.

In the object detection system of the present invention, the sensor poles are respectively provided with an infrared light source, an infrared sensor, a video camera, and a background panel illuminated by a predetermined light source. Infrared emitted from the infrared light source of the first sensor pole of the plurality of sensor poles installed is received by the infrared sensor of the second sensor pole, and the infrared ray of the second sensor pole is received. When the infrared from the first sensor pole being monitored by the sensor is blocked, the second
Illuminates the background panel of the sensor pole of
It is provided with a means for picking up an image with a video camera of the sensor pole.

Further, the sensor pole may be provided with an infrared light source, an infrared sensor, and a video camera of different systems so that bidirectional object detection and imaging can be performed.

The predetermined light source for illuminating the background panel may be a visible light region or an infrared region, and a video camera having a sensitivity characteristic matching the wavelength band of the light source can be used.

[0009]

In the present invention, a plurality of sensor poles are installed so as to surround the surveillance area. Infrared barriers are formed between the sensor poles, and when a suspicious object enters the infrared barriers, the infrared rays are blocked, and the infrared sensors detect this. Then, the background panel of the sensor pole that has the infrared sensor that detects it emits light, and at the same timing, the TV camera of the sensor pole that has the infrared light source that emits infrared rays images the surveillance area by infrared rays. . The suspicious object is imaged by the television camera with the illuminated background panel as the background. In this way, it is possible to image a suspicious object even at night without constantly providing bright illumination. Note that during the daytime, normal imaging with a TV camera can be performed with sunlight illumination.

[0010]

EXAMPLES The present invention will be specifically described below with reference to examples.

FIG. 1 is a block diagram showing a configuration of a first embodiment of the present invention, and FIG. 2 is an explanatory diagram showing an outline of a monitoring system of the present invention.

In the sensor pole 1 installed at a predetermined position, a light transmitter 2 as an infrared light source, a light receiver 3 for receiving infrared rays, a video camera 4, and a reflector 5 serving as a background panel.
And a light source 6 for illuminating the reflector 5. As the light source 6, an incandescent lamp, an instant light type fluorescent lamp, a strobe lamp, or an infrared lamp can be used. When an infrared lamp is used as the light source 6, the video camera 4 is also an infrared camera.

The sensor pole 1 is provided with a solar cell 7 and a battery 8, and during the daytime, the electric power generated by the solar cell 7 by the charging circuit 9 is stored in the battery 8. 1
0 is a control unit for controlling each device in the sensor pole 1, 11
Is an optical fiber cable for transmitting video information and alarm signals of a plurality of sensor poles to the integrated board 13, and 12 is optical conversion for transmitting video information captured by the camera 4 and suspicious object intrusion information to the optical fiber cable 11. It is a vessel. Reference numeral 14 is an outside light, and 15 is a metal cable for transmitting electric power from a commercial power source.

In the system of the first embodiment, when a suspicious person enters a certain monitoring area, infrared rays from the light emitting side of the sensor poles sandwiching the section are blocked by the light receiving side, so that the sensor pole on the light receiving side. The light receiver 3 inside detects the light and turns on the light source 6 to illuminate the reflector 5. The signal from the light receiver 3 is also transmitted to the sensor pole on the light projecting side via the optical fiber cable 11, and the camera 4 there is operated to capture an image. The image information is transmitted to the integrated board 13 via the optical fiber cable 11 and is transmitted to the monitoring station together with the alarm signal.

FIG. 3 shows a second embodiment of the present invention. In this embodiment, an infrared light source, an infrared sensor, and a video camera which are separate systems are provided in the sensor pole 1. That is, the light transmitters 2A and 2B, the light receivers 3A and 3B,
Two systems of video cameras 4A and 4B and light sources 6A and 6B are provided.

FIG. 4 shows the general system of the second embodiment, and FIG. 5 shows the optical LAN system. The system shown in FIG. 4 is a type that issues an alarm by image processing of the image taken by the camera when a suspicious object enters, and does not send the image signal itself to the monitoring station. The system shown in FIG. 5 is an alarm signal and the image captured by the camera It shows a type in which an optical LAN is formed for transmitting a signal to a monitoring board.

A method for detecting an intruder in the system shown in FIG. 4 will be described.

[0019] In Figure 4 the system is a light control unit 16 (see FIG. 3) generates a pulse wave of left-handed infrared clockwise infrared and frequency f ₂ of the frequency f _1, and sends the light transmitter 2A, a 2B. If there is no abnormality, the infrared pulse from the a-pole transmitter 2A is relayed in the order of b → c → d → a and returns to the a-pole light receiver 3A. Also, the a-pole transmitter 2B
Infrared pulse from is relayed as d → c → b → a,
It returns to the light receiver 3B of Paul. At this time, the same signal is sent to the alarm panel 18 via the a-pole light beam converter 12. Since the alarm board 18 does not find an abnormal pulse signal, no alarm is issued.

As shown in FIG. 6, if a person enters between a and d on the f ₁ beam, the light receiver 3A is shielded from light.
The light beam control unit 16 operates the light beam output unit 19 to confirm the image, and activates the camera 4A and the illumination 6A. Camera 4A
The video of is taken into the video control unit 20 and the image is judged. When it is determined that there is an intruder, the video output unit 21 operates, the signal goes to the transmission input unit 22, and the light beam control unit 16
Then, the address of the own station is formed, and the warning warning is given by the warning board 18 via the light beam converter 12. Also, a on the f ₂ beam
The light is also shielded during the period from to d, and the light receiver 3B having the d pole is shielded. The d-pole camera 4B and the light source 6B are also activated, and it is confirmed that they are facing each other.

This signal is transmitted as d → c → b → a, and a
An identification alarm is given by an alarm panel 18 via the light beam converter 12 of Paul.

In the system of FIG. 5, the image during alarm confirmation is transmitted through the analog-optical converter 12 to the optical LAN cable 1
1 is sent to the monitoring panel. The operation of this video recording means is at the time of a true alarm linked with an alarm board. In addition, when watching the video arbitrarily, from the monitoring panel via the digital optical converter,
The light output unit 19 of the corresponding pole can be operated by the optical LAN cable. In this case, the alarm signal is locked by remote control.

[0022]

As described above, according to the present invention, a suspicious object is detected by infrared rays and an image of the suspicious object is taken by area illumination. Therefore, whether the person who shields the infrared rays is a suspicious person or an animal. Therefore, it is possible to clearly detect a suspicious object without using a special type of video camera.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a first exemplary embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an outline of a monitoring system of the present invention.

FIG. 3 is a schematic diagram showing a configuration of a second exemplary embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a configuration example of a second embodiment.

FIG. 5 is an explanatory diagram showing another configuration example of the second embodiment.

FIG. 6 is an explanatory diagram of suspicious object detection in the second embodiment.

[Explanation of symbols]

1 sensor pole, 2 light transmitter, 3 light receiver, 4 video camera, 5 reflector (background panel), 6 light source, 7
Solar cell, 8 battery, 9 charging circuit, 10 control unit, 11 optical fiber cable, 12 optical converter, 13
Integrated board, 14 external light, 15 metal cable, 16 ray control section, 18 alarm panel, 19 ray output section, 20 video control section, 21 video output section, 22 transmission input section

Claims (4)

[Claims] 1. A sensor pole receives an infrared light source that emits infrared light to an infrared sensor provided on another sensor pole, and receives an infrared light emitted from an infrared light source provided on another sensor pole. An infrared sensor, a video camera including other sensor poles in its image pickup area, and a background panel illuminated by a predetermined light source which becomes background light in the image pickup area of the video camera installed in the other sensor poles. Object detection device characterized by. 2. A plurality of sensor poles, each of which is provided at a certain interval, wherein an infrared light source, an infrared sensor, a video camera, and a background panel illuminated by a predetermined light source are provided on the sensor poles, respectively. A first sensor pole of the first sensor pole, the infrared ray emitted from the infrared light source of the first sensor pole is received by the infrared sensor of the second sensor pole, and is monitored by the infrared sensor of the second sensor pole. The object detection system is provided with means for illuminating the background panel of the second sensor pole and capturing an image with the video camera of the first sensor pole when the infrared ray from the sensor pole is blocked. 3. An infrared light source that emits infrared rays to an infrared sensor provided on another sensor pole, and an infrared ray emitted from an infrared light source provided on another sensor pole is received by the sensor pole. Infrared sensors are arranged in two systems above and below, and two systems of video cameras including other adjacent sensor poles in the imaging area and background light of the imaging area of the video cameras installed in the other sensor poles are provided. And a background panel which is illuminated by the light source of 1. 4. A plurality of sensors, each of which is provided with two infrared light sources and two infrared sensors on a sensor pole, a video camera, and a background panel illuminated by a predetermined light source and which are installed at a certain interval. Infrared emitted from the infrared light source of the first sensor pole among the sensor poles is received by the infrared sensor of the second sensor pole and is monitored by the infrared sensor of the second sensor pole. When the infrared ray from the first sensor pole is blocked, the background panel of the first sensor pole and the background panel of the second sensor pole are respectively illuminated, and the video camera and the second sensor pole of the first sensor pole are illuminated. An object detection system comprising means for picking up an image with a video camera of a sensor pole.