JP2000306172A - Monitoring camera system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect that the image pickup direction of a monitoring camera is illegally changed and to output an alarm when it is changed illegally by providing a geomagnetic sensor detecting the change in the geomagnetism provided on an image picking up means and an alarming means outputting an alarm based on detected results of a geomagnetic detecting means. SOLUTION: When the direction of a monitoring camera 1 is changed, a geomagnetic sensor 13 installed on the camera 1 changes its direction in accordance with the direction change of the camera 1. Then, the sensor 13 detects the change in the direction. The sensor 13 transmits detected results as a signal to a signal transmitting part 12. The part 12 converts the detected results by the detecting part 13 into a prescribed signal and transmits it together with an image signal to a controller through a coaxial cable. The controller receives an image signal from the monitoring camera and other signals. In the case it receives a detection signal, it outputs an alarm signal to an alarm device. The alarm device transmits an alarm to a security center through a telephone line, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surveillance camera system in which a surveillance camera is installed in places such as stores and companies where people come and go, and monitors and records the actions of suspicious persons.

[0002]

2. Description of the Related Art Conventionally, a surveillance camera has been installed in a store or an entrance, which is a surveillance place, and an image transmitted from the surveillance camera is displayed on a monitor at a surveillance center, or this image is recorded for ex-post monitoring. Surveillance camera systems as evidence are known. In such a surveillance camera system, the surveillance camera is fixed to, for example, a ceiling or the like by adjusting the imaging direction so as to image a predetermined monitoring location.

[0003]

However, in the above-described conventional surveillance camera system, for example, a wrongdoer may push the surveillance camera with his / her hand or the like and change the imaging direction of the surveillance camera, and then commit a crime. . If an observer constantly monitors the monitor, he / she can notice such misconduct, but if he only records images from surveillance cameras, he cannot record images of criminal acts. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a surveillance camera system capable of detecting when a surveillance camera has illegally changed the imaging direction and outputting an alarm. Aim.

[0005]

In order to solve the above-mentioned problems and to achieve the above-mentioned object, a surveillance camera system according to a first aspect of the present invention comprises an image pickup means for picking up an image, and a terrestrial magnetism provided in the image pickup means. And a warning means for outputting a warning based on the detection result of the geomagnetic detection means.

[0006] The surveillance camera system according to a second aspect of the present invention provides an image capturing means for capturing an image, a fixing means for fixing the image capturing means to a ceiling or the like, a permanent magnet provided on the fixing means, And a warning means for outputting a warning based on the detection result of the magnetic force detecting means.

[0007] A surveillance camera system according to a third aspect of the present invention comprises an image pickup means for picking up an image, a fixing means for fixing the image pickup means to a ceiling or the like, and a permanent magnet and a hall element provided on the fixing means. A detecting unit configured to change the relative position of the permanent magnet and the Hall element by the movement of the fixing unit, and to detect the movement of the fixing unit based on a magnetic detection result by the Hall element;
Alarm means for outputting an alarm based on the detection result of the detection means.

[0008] A surveillance camera system according to a fourth aspect of the present invention is an image capturing means for capturing an image, a fixing means for fixing the image capturing means to a ceiling or the like, and an infrared light projecting unit and an infrared light receiving unit provided in the fixing means. Detecting means for detecting the movement of the fixing means based on the detection result of the infrared light by the infrared light receiving section, and alarm means for outputting an alarm based on the detection result of the detection means.

The monitoring camera system according to a fifth aspect of the present invention is an image capturing means for capturing an image, a fixing means for fixing the image capturing means to a ceiling or the like, and a change in pressure applied to the fixing means provided on the fixing means. And a warning means for outputting a warning based on the detection result of the pressure sensor.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a surveillance camera system according to the first invention will be described with reference to FIGS. FIG.
1 is a configuration diagram of a surveillance camera system according to the present embodiment. 1A to 1D are monitoring cameras that capture images of a monitoring area. Reference numeral 2 denotes a controller, which is connected to the monitoring cameras 1A to 1D via a coaxial cable 5, receives images and audio signals transmitted from the monitoring cameras 1A to 1D, and performs processing. Reference numeral 3 denotes a time lapse video, which includes a controller 2 and a coaxial cable 6
And receives the image and audio signals transmitted from the controller 2 to record and record. 4 is an alarm device,
It monitors the monitoring camera 1 for fraudulent activities and sends an alarm to a remote security center (not shown) when an abnormality occurs.

FIG. 2 is a functional block diagram of the monitoring camera 1. An imaging unit 10 includes a lens, a CCD, and the like, and captures an image in the monitoring area and converts the captured image into a predetermined image signal. Reference numeral 11 denotes a sound collecting unit which is constituted by a microphone and collects sound in the monitoring area and converts the sound into a predetermined sound signal. Reference numeral 12 denotes a signal transmission unit, and the imaging unit 10 and the sound collection unit 11
Is converted into a predetermined output signal and transmitted to the controller 2 via the coaxial cable 5. Reference numeral 13 denotes a terrestrial magnetism sensor installed on the upper surface of the surveillance camera 1, which detects terrestrial magnetism and calculates the azimuth of the surveillance camera.

FIG. 3 is a functional block diagram of the controller 2. Reference numeral 20 denotes an image processing unit, which includes coaxial cables 5A to 5D.
, And processes the image signals received from the monitoring cameras 1A to 1D via the monitor cameras 1A to 1D, and combines them as one image divided into four. Further, it detects whether or not the image signal is normally received. Reference numeral 21 denotes an image output unit which sends out the quartered image synthesized by the image processing unit 20 to the time lapse video 3 via the coaxial cable 6. Reference numeral 22 denotes a C operation unit which includes switches and the like, and allows an operator to perform various setting operations of the controller 2. 23 is CP
A C control unit composed of U and the like is connected to each unit to perform operation control. Reference numeral 24 denotes an interface unit composed of, for example, RS232C, which relays a signal from a C authentication unit 25 described later. 25 is a C composed of, for example, a card reader
The authentication unit checks the qualification of the operator who operates the controller 2. Reference numeral 26 denotes a C power supply unit that supplies power to each unit of the controller 2. Reference numeral 27 denotes a C power supply cutoff detecting unit which, when the power supply of the C power supply unit 26 is cut off, detects this and switches a relay contact (not shown). Reference numeral 28 denotes a C alarm output unit which outputs an alarm signal to the alarm device 4 when the image signal from the monitoring cameras 1A to 1D is interrupted by the image processing unit 20, for example.

FIG. 4 is a functional block diagram of the time lapse video 3. A recording unit 31 receives the four-divided image signal received from the controller 2 and records it on a video tape. Reference numeral 32 denotes a T operation unit for performing operations such as starting and stopping recording, timer operation, and insertion / removal of a video tape. Reference numeral 33 denotes a T control unit composed of a CPU and the like, which is connected to each unit to perform operation control. Reference numeral 34 denotes an interface unit composed of, for example, RS232C, which relays a signal from a T authentication unit 35 described later. Numeral 35 denotes a T authentication unit composed of, for example, a card reader, which checks the qualification of the operator who operates the time lapse video 3. Reference numeral 36 denotes a T power supply unit which supplies power to each unit of the time lapse video 3. Reference numeral 37 denotes a T power cutoff detecting unit which detects when the power of the T power supply unit 36 is cut off, and switches a relay contact (not shown). 38 is T
In the alarm output unit, for example, the controller 2 to the recording unit 31
When the image signal from the device is interrupted, an alarm signal is output to the alarm device 4.

Next, an operation of detecting a change in the direction of the monitoring camera 1 and outputting an alarm in the monitoring camera system according to the present invention will be described. First, the power of each part of the monitoring camera system is turned on. Each of the monitoring cameras 1A to 1D captures an image of the monitoring area by the imaging unit 10 and the signal transmission unit 12
The image signal is converted into an image signal of, for example, the NTSC system, and transmitted through the coaxial cables 5A to 5D. The image signal is sent to the image processing unit 20 of the controller 2 via the coaxial cables 5A to 5D.
Is input to The image processing unit 20 includes the monitoring cameras 1A to 1
The four images D are created as one image divided into four, and the image output unit 21 outputs the four images to the time-lapse video 3. Here, when the direction of the surveillance camera 1 is changed,
The direction of the geomagnetic sensor 13 installed in the monitoring camera 1 changes as the direction of the monitoring camera 1 changes. The geomagnetic sensor 13 detects a change in the direction. Geomagnetic sensor 1
3 outputs a signal of the detection result to the signal transmission unit 12. The signal transmission unit 12 converts the detection result of the detection unit 13 into a predetermined signal, and transmits the signal together with the image signal to the controller 2 via the coaxial cable 5A. In the controller 2, the image processing unit 2
0, the surveillance camera 1A via the coaxial cables 5A to 5D
-1D image signals and other signals are received. And
When receiving the detection signal, the C control unit 23 outputs an alarm signal to the alarm device 4 at the C alarm output unit 28. Upon receiving the alarm output from the controller 2, the alarm device 4 sends an alarm to a remote security center (not shown) through a telephone line or the like. As described above, in the surveillance camera system according to the present embodiment, when the direction of the surveillance camera 1 is changed illegally, an alarm can be output, so that such a sabotage action can be promptly dealt with. it can.

Next, an embodiment of the surveillance camera system according to the second invention will be described with reference to FIG. Note that the configuration of the surveillance camera system according to the present embodiment is the same as that of the above-described embodiment of the first invention except for the configuration of the detection unit 13 of the surveillance camera 1, and therefore will be described using the same figure numbers. FIG.
3 is a schematic diagram showing a state in which the monitoring camera 1 is mounted. 1
Reference numeral 01 denotes a camera mount which is a fixing unit for fixing the monitoring camera 1 to a ceiling or the like, and reference numeral 102 denotes a permanent magnet attached to the camera mount 101. The monitoring camera 1 has a detection unit 13
Are provided. The magnetic sensor 131 detects the strength of the magnetic force of the magnetic field formed by the permanent magnet 102.

Next, an operation of detecting a change in the direction of the surveillance camera 1 and outputting an alarm in the surveillance camera system according to the second invention will be described. When the direction of the surveillance camera 1 is changed, the magnetic sensor 131 installed in the surveillance camera 1 moves with the change of the direction of the surveillance camera 1, so that the distance between the permanent magnet 102 and the magnetic sensor 131 is changed. Since the resulting magnetic force changes, the change in the magnetic force is detected, converted into an electric signal, and output to the signal sending unit 12. The signal transmission unit 12 converts the detection result of the detection unit 13 into a predetermined signal, and transmits the signal together with the image signal to the controller 2 via the coaxial cable 5A. In the controller 2, the image processing unit 2
0, the surveillance camera 1A via the coaxial cables 5A to 5D
-1D image signals and other signals are received. And
When receiving the detection signal, the C control unit 23 outputs an alarm signal to the alarm device 4 at the C alarm output unit 28. Upon receiving the alarm output from the controller 2, the alarm device 4 sends an alarm to a remote security center (not shown) through a telephone line or the like. As described above, in the surveillance camera system according to the present embodiment, when the direction of the surveillance camera 1 is changed illegally, an alarm can be output, so that such a sabotage action can be promptly dealt with. it can.

Next, a surveillance camera system according to a third invention will be described with reference to FIG. In the present invention, the means for detecting a change in the direction of the monitoring camera is provided in a fixing means for fixing the monitoring camera 1 to a ceiling or the like. FIG. 6 is a schematic cross-sectional view of the mounting state of the monitoring camera 1 and a fixing portion in the present embodiment. Camera mount 11 as a fixed part
The surveillance camera 1 and the surveillance camera 1 are connected by a ball joint including a ball portion 113 and a ball receiving portion 115. After adjusting the direction toward the imaging area of the surveillance camera,
6. Tighten and fix. A plurality of permanent magnets 114 are embedded in the ball portion 113 at predetermined intervals, and a Hall element 112 is embedded in the ball receiving portion 115. The Hall element 112 is a switch that turns on and off by detecting a magnetic force. Here, when the direction of the monitoring camera 1 is changed, the ball portion 113 rotates in the ball receiving portion 115 of the ball joint, and the Hall element 11
The Hall element 112 is turned on or off by changing the polarity of the magnetic force to be sensed by the movement of the permanent magnet 114 facing 2. The on / off state of the Hall element 112 is output to the signal transmission unit 12. The signal transmission unit 12 converts the detection result of the detection unit 13 into a predetermined signal, and transmits the signal together with the image signal to the controller 2 via the coaxial cable 5A. In the controller 2, the coaxial cables 5A to 5D
, The image signals of the monitoring cameras 1A to 1D and other signals are received. And when the detection signal is received,
The C control unit 23 outputs an alarm signal to the alarm device 4 at the C alarm output unit 28. Upon receiving the alarm output from the controller 2, the alarm device 4 sends an alarm to a remote security center (not shown) through a telephone line or the like. As described above, in the surveillance camera system of the present embodiment, the surveillance camera 1
If the direction is changed illegally, an alarm can be output, and such an obstructive action can be promptly dealt with.

Next, an embodiment of the surveillance camera system according to the fourth invention will be described with reference to FIG. In this embodiment, the means for detecting a change in the direction of the monitoring camera 1 is provided on a camera mount 121 which is a fixing means for fixing the monitoring camera 1 to a ceiling or the like. FIG. 7 is a schematic cross-sectional view of a mounting state of the monitoring camera 1 and a fixing portion in the present embodiment. The camera mount 121, which is a fixed part, and the monitoring camera 1 are connected by a ball joint composed of a ball part 123 and a ball receiving part 122. After adjusting the direction toward the imaging area of the monitoring camera 1, the camera mounting part 121 is fixed by tightening with a fixing screw 128. Is done. In the camera mount 121, an infrared LED 126 serving as an infrared light projecting unit, a photodiode 127 serving as an infrared light receiving unit, a roller unit 124, and an infrared blocking unit 125 are provided. The infrared blocking section 125 has a disk shape and a plurality of holes through which infrared light is transmitted are provided at predetermined intervals. The infrared blocking unit 125 is connected to the roller 124, and the roller 1
It is configured to rotate with the rotation of 24. The roller 124 is installed so as to contact the ball portion 123 of the ball joint.

Here, when the direction of the monitoring camera 1 is changed, the ball portion 123 rotates in the ball receiving portion 122 of the ball joint, so that the rotation of the ball portion 123 causes the roller 124 to rotate. The infrared blocking unit 125 rotates. Although the infrared light emitted by the infrared LED is received by the photodiode, the rotation of the ball portion 123 also rotates the infrared cutoff portion, so that the infrared light is intermittently cut off. The detection output of the intermittent infrared light reception by the photodiode is sent to the signal sending unit 12. The signal transmission unit 12 converts the detection result of the detection unit 13 into a predetermined signal, and transmits the signal together with the image signal to the controller 2 via the coaxial cable 5A. In the controller 2, the image processing unit 20 receives the image signals of the monitoring cameras 1A to 1D and other signals via the coaxial cables 5A to 5D.
When the detection signal is received, the C control unit 23 outputs an alarm signal to the alarm device 4 at the C alarm output unit 28. Upon receiving the alarm output from the controller 2, the alarm device 4 sends an alarm to a remote security center (not shown) through a telephone line or the like. As described above, in the surveillance camera system according to the present embodiment, when the direction of the surveillance camera 1 is changed illegally, an alarm can be output, so that such a sabotage action can be promptly dealt with. it can.

Next, an embodiment of the surveillance camera system according to the fifth invention will be described with reference to FIG. In this embodiment, the means for detecting a change in the direction of the monitoring camera 1 is provided on a camera mount 131 which is a fixing means for fixing the monitoring camera 1 to a ceiling or the like. FIG. 8 is a schematic cross-sectional view of the mounting state of the monitoring camera 1 and a fixing portion in the present embodiment. The camera mount 131, which is a fixed part, and the monitoring camera 1 are connected by a ball joint composed of a ball part 133 and a ball receiving part 132. After adjusting the direction toward the imaging area of the monitoring camera 1, it is fixed by tightening with a fixing screw 135. Is done. Between the ball receiving portion 132 and the ball portion 133 on the opposite side of the fixing screw 135, a sheet-like piezoelectric sensor 134 is provided.
Is provided, and a predetermined pressure is applied when tightened with the fixing screw 135. When the intruder loosens the tightening of the fixing screw 135 in order to change the direction of the monitoring camera 1, the pressure between the ball portion 133 and the ball receiving portion 132 decreases, and the pressure sensor 134 detects the pressure, and the pressure sensor 134 detects the pressure.
Is output to the signal transmission unit 12. The signal transmission unit 12 converts the detection result of the detection unit 13 into a predetermined signal, and transmits the signal together with the image signal to the controller 2 via the coaxial cable 5A.
Send to In the controller 2, the monitoring cameras 1 </ b> A to 1 </ b> D are connected to the image processing unit 20 via the coaxial cables 5 </ b> A to 5 </ b> D.
Image signals and other signals. When the detection signal is received, the C control unit 23 outputs the C alarm output unit 2
At 8, an alarm signal is output to the alarm device 4. Upon receiving the alarm output from the controller 2, the alarm device 4 sends an alarm to a remote security center (not shown) through a telephone line or the like. As described above, in the surveillance camera system according to the present embodiment, when the direction of the surveillance camera 1 is changed illegally, an alarm can be output, so that such a sabotage action can be promptly dealt with. it can.

[0021]

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a surveillance camera system

FIG. 2 is a functional block diagram of a surveillance camera.

FIG. 3 is a functional block diagram of a controller.

FIG. 4 is a functional block diagram of a time-lapse video.

FIG. 5 is a schematic view showing an attached state of a surveillance camera according to the second invention.

FIG. 6 is a schematic sectional view of a mounting state and a fixing portion of the monitoring camera according to the third invention.

FIG. 7 is a schematic cross-sectional view of a mounting state and a fixing portion of the monitoring camera according to the fourth invention.

FIG. 8 is a schematic cross-sectional view of a mounting state and a fixing portion of the monitoring camera according to the fifth invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Surveillance camera 101, 111, 121, 131 ... Camera mount 102, 114 ... Permanent magnet 112 ... Hall element 113, 123, 133 ... Ball part 115, 122, 132 ... Ball receiving part 116, 128, 135 ... Fixing screw 124 ... Roller 125 ... Infrared ray blocking part 126 ... Infrared LED 127 ... Photodiode 13 ... Detection part 134 ... Piezoelectric sensor, pressure sensitive sensor 131 ... Magnetic sensor 2 ... Controller 3 ... Time lapse video 4 ... Alarm device 5, 6 ... Coaxial cable

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Keita Shimozawa 6-11-23 Shimorenjaku, Mitaka City, Tokyo Inside Secom Co., Ltd. (72) Katsuo Sato 6-11-23 Shimorenjaku, Mitaka City, Tokyo Secom (72) Inventor Junichi Yamazaki 6-11-23 Shimorenjaku, Mitaka-shi, Tokyo SECOM Corporation F-term (reference) 5C022 AA05 AB61 AB62 5C054 AA01 AA05 CA04 CC03 CE01 CE16 CF01 EA01 EA05 EA07 FC13 FE28 GA01 GB01 GD03 HA19 5C084 AA02 AA07 BB40 DD11 DD21 DD23 DD41 DD77 EE10

Claims (5)

[Claims] 1. A surveillance camera system for recording an image of a surveillance area, comprising: imaging means for imaging the image; geomagnetic detection means provided in the imaging means for detecting a change in geomagnetism; and detection by the geomagnetism detection means. And a warning means for outputting a warning based on the result. 2. A surveillance camera system for recording an image of a surveillance area, comprising: imaging means for imaging the image; fixing means for fixing the imaging means to a ceiling or the like; and a permanent magnet provided on the fixing means. A surveillance camera system comprising: a magnetic force detection unit provided in the imaging unit for detecting a change in magnetic force by the permanent magnet; and an alarm unit for outputting an alarm based on a detection result of the magnetic force detection unit. 3. A surveillance camera system for recording an image of a surveillance area, comprising: imaging means for imaging the image; fixing means for fixing the imaging means to a ceiling or the like; and a permanent magnet provided on the fixing means. And a Hall element, wherein the relative position between the permanent magnet and the Hall element is changed by the movement of the fixing means, and a detection for detecting the movement of the fixing means based on a magnetic detection result by the Hall element. And a warning means for outputting a warning based on the detection result of the detection means. 4. A surveillance camera system for recording an image of a surveillance area, comprising: imaging means for imaging the image; fixing means for fixing the imaging means to a ceiling or the like; A detecting unit configured to include a light unit, an infrared receiving unit, and an infrared blocking unit, and detecting a movement of the fixing unit based on an infrared detection result by the infrared receiving unit; and an alarm outputting an alarm based on a detection result of the detecting unit. Surveillance camera system comprising: 5. A surveillance camera system for recording an image of a surveillance area, comprising: an image pickup means for picking up the image; fixing means for fixing the image pickup means to a ceiling or the like; A surveillance camera system comprising: a pressure sensor for detecting a change in pressure applied to the means; and an alarm unit for outputting an alarm based on a detection result of the pressure sensor.