JP2000069458A - Multi-camera monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To construct a multi-camera monitoring system where plural video cameras corresponding to sensors monitor data so that it can easily be installed with the small number of wirings. SOLUTION: The sensor signals of a sensor 12a detecting a suspicious object are set to be digital codes in an A/D conversion part 13a and a code part 14a. A code synthesis part 17 arranges them in the different horizontal scanning periods of the vertical fly-back period of a video signal. An overlap part 16 overlaps them with the video signal and they are transmitted as video signals S11a to a monitoring part. The monitoring part receives the video signals S11a from respective video camera parts, stubs and separates the respective codes in a separation part 52a and a decoding part 53a decodes them. Data on the decoded sensor signals are stored in a data storage part 61. The sensor signal and the like from the data storage part 61 are fetched into a display control part 56 and a display switch part 55 is switch-controlled, based on the sensor signal. The prescribed video signal is selected and it is displayed on a display device 58 so as to monitor it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-camera surveillance system for monitoring with a plurality of video cameras compatible with sensors and having a small number of wires and easy installation.

[0002]

2. Description of the Related Art In each monitoring area, a video camera and a sensor for detecting intrusion of a suspicious object or the like are provided so that the monitoring area is monitored when the sensor detects the intrusion of a suspicious object. There is a multi-camera surveillance system that supports sensors. In a conventional sensor-compatible multi-camera monitoring system, sensors for detecting intrusion of a suspicious object or the like are separately wired independently of the video camera. Therefore, there is a problem that independent wiring is required for each sensor, the number of wirings is increased, installation is complicated, and uneconomical.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and a multi-camera monitoring system for monitoring with a plurality of video cameras compatible with sensors is constructed so that the number of wires is small and the system can be easily installed. The purpose is to:

[0004]

Means for Solving the Problems A plurality of video cameras for monitoring each monitoring area, a video camera unit including an infrared sensor or the like for detecting intrusion of a suspicious object, and a video signal output from the video camera unit And a monitoring unit including a control unit such as a display device controlled by a sensor signal output from the sensor, and a suspicious object intruded by the sensor. In a multi-camera surveillance system for monitoring a corresponding monitoring area when sensing the like, a superimposing unit attached to a video camera unit and superimposing a sensor signal on a predetermined horizontal scanning period of a vertical retrace period of the video signal; A configuration is provided that is attached to the section, a separation section is provided for separating the superimposed sensor signal, and a sensor signal such as an infrared ray for detecting intrusion of a suspicious object is superimposed on an output signal of the video camera and transmitted. That.

[0005] An encoder for digitally encoding the sensor signal and a decoder for decoding the encoded sensor signal are provided, and a signal to be superimposed on a predetermined period of the vertical blanking period is a digitally encoded sensor signal. And

A plurality of sensors are provided for each of the video cameras, and the sensor signals output from the sensors are transmitted while being superimposed on separate horizontal scanning periods of the vertical retrace period of the video signals.

[0007] A sensor ID or a code indicating the sensor type is added to the sensor signal and transmitted.

[0008] A camera ID for specifying a video camera is superimposed and transmitted in a predetermined horizontal scanning period of a vertical blanking period of the video signal.

A turning control signal generating unit for generating and encoding a camera turning control signal in the monitoring unit; and a predetermined horizontal scanning period for a vertical retrace period of the video signal, the turning control signal generating unit for generating the encoded camera turning control signal. And a transmission unit for transmitting the image data to the video camera unit.

The turning control signal generating section obtains the transmitted sensor signal and generates a turning control signal for the camera based on the transmitted sensor signal.

The turning control is performed to different preset turning positions according to the transmitted sensor signals.

The turning control signal generating section is provided with a switching section for switching between a camera turning control signal based on the sensor signal and a manually turning camera turning signal, so that the turning of the camera can be controlled manually.

The monitoring unit generates a character corresponding to the level of the sensor signal or the like and superimposes the character on the video signal.
An SDC (On-Screen Display Controller) is provided so that characters corresponding to the level of the transmitted sensor signal and the like are superimposed and displayed on the display screen.

The monitoring section is provided with a storage section such as a hard disk for storing the sensor signal, and stores and transmits the transmitted sensor signal.

The monitoring section is provided with a printout section for the sensor signal, and prints out the transmitted sensor signal.

The sensor attached to the video camera unit includes:
Include temperature sensor.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic block diagram of (A) one video camera unit and (B) a schematic block diagram of a monitoring unit of one embodiment of a multi-camera monitoring system according to the present invention. A video camera unit including the video camera 11a and the sensor 12a shown in FIG. 1 is attached to each monitoring area. In the monitoring unit, a video signal S11a output from each video camera unit
In response to this, a selection is made based on a sensor signal or the like and displayed on the display device 58 to monitor the intrusion of a suspicious object into the monitoring area. The sensors 12a and 12b of the video camera unit include an infrared sensor, an ultrasonic sensor, and the like, and detect a human body or the like and detect intrusion of a suspicious object or the like. The sensor signal output from each sensor is A /
It is digitized by the D conversion units 13a and 13b,
A and 14b are digital codes. In the sensor signal,
It is also possible to add sensor types and sensor IDs generated by the sensor type generation units 15a and 15b to facilitate the use of sensor signals later. The sensor signals of the sensors 12a and 12b, which are digitally encoded by the encoding units 14a and 14b,
The code synthesizing unit 17 arranges the output video signals of the video camera so as to have different horizontal scanning periods in the vertical blanking period. For example, the sensor signal of the sensor 12a is 12H, the sensor 12b is
Are arranged in a period of 13H. Then, the code superimposing unit 16 superimposes each of these sensor signals on each horizontal scanning period of the vertical retrace period and transmits the signal as a video signal S11a to the monitoring unit. In such a configuration, new wiring for transmitting the sensor signal to the monitoring unit is not required, and the installation is easy. Further, since wiring for each sensor is not required, a plurality of sensors 12a,
12b,... Can be attached to detect suspicious objects in detail. Further, a temperature sensor, a brightness sensor, and the like can be easily installed. Camera ID generation unit 18
Then, a camera ID indicating the camera number and the installation location of the video camera 11a is generated, synthesized with the preceding sensor signal by the code synthesizing unit 17, transmitted on the 11H for example by the code superimposing unit 16, and transmitted to the monitoring unit. It can also be used for monitoring.

The monitoring section receives the video signals S11a and S11b from the respective video camera sections and separates them into separation sections 52a and 52b.
b, the horizontal scanning period in which the above codes are superimposed, for example, 11
H, 12H and 13H are cut out and separated. The separated signals in the horizontal scanning period are converted into binary signals by the Schmitt circuits of the decoding units 53a and 53b, and decoded by extracting a sensor signal or the like in accordance with a code format. Decoding section 53
The data such as the camera ID, the sensor type, the sensor signal, and the like decrypted by a and 53b are stored in the data storage unit 61.
The sensor signal and the like are fetched from the data storage unit 61 into the display control unit 56 composed of an MPU or the like, and the switching of the display switching unit 55 is controlled based on the sensor signal. Is selected and displayed on the display device 58 for monitoring. At that time, it is recorded on the VTR 59 and used for verification.

The display control unit 56 reads out encoded data such as a camera ID, a sensor type, and a sensor signal corresponding to the video signal selected for display from the data storage unit 61,
OSDC (On-Screen Display Controller) control unit 60
The data is sent to the OSDC 57 as a command, and appropriate character data is superimposed on the video signal, displayed on the display device 58, recorded on the VTR 59, and used for monitoring. Further, these data are stored in a data storage device 63 such as a hard disk,
Prepare for later verification. Further, a printing device 62 is provided so that these data can be printed out as needed. By including a temperature sensor in the sensor of the video camera unit, it is possible to prevent not only intrusion of a suspicious object but also fire.

The sensor signals decoded by the decoding units 53a and 53b are taken into the turning control signal generation units 54a and 54b,
In response to the signal, an encoded camera turning control signal for the video camera 11a or the like is generated. Turning control signal generator 54
In a and 54b, by providing an LUT (Look Up Table) or the like inside and referring to this, it is also possible to perform turning control to a different preset turning position by a transmitted sensor signal. The turning control signal generator 5
In 4a and 54b, when there is a control signal for manually turning the camera from the camera turning control button 64, the camera turning control signal is generated by giving priority to that signal. These encoded camera turning control signals are transmitted to the superimposing units 51a and 51b.
And superimposes it on, for example, 14H of the video signals S11a and S11b and transmits it to the video camera unit. The turning signal extracting unit 19 of the video camera unit extracts the 14H portion, decodes the camera turning control signal, controls the turning control unit 20,
The video camera 11a and the like are turned in a predetermined direction. Such a configuration eliminates the need for wiring for turning control of the video camera, and facilitates construction of a monitoring system.

[0021]

As described above, a plurality of video cameras for monitoring each monitoring area, a video camera unit including an infrared sensor or the like for detecting the intrusion of a suspicious object, etc., and an output from the video camera unit A display device for displaying a video signal
Or a monitoring device including a recording device or the like for recording the video signal and a control unit such as a display device controlled by the sensor signal output from the sensor, which is applicable when a sensor detects intrusion of a suspicious object or the like. In a multi-camera monitoring system for monitoring a monitoring area to be monitored, a superimposing unit that superimposes a sensor signal attached to a video camera unit in a predetermined horizontal scanning period of a vertical retrace period of a video signal, and a superimposed sensor attached to the monitoring unit It is necessary to separately provide wiring for sensor signals, etc. by providing a separation unit that separates signals and transmitting a sensor signal such as infrared light that detects intrusion of a suspicious object etc. superimposed on the output signal of the video camera Therefore, a system that can be easily installed with a small number of wires can be obtained.

[Brief description of the drawings]

FIG. 1A is a schematic block diagram of one video camera unit of one embodiment of a multi-camera monitoring system according to the present invention, and FIG.
It is a schematic block diagram of a monitoring part.

[Explanation of symbols]

 11a Video camera 12 Camera ID generation unit 12a, 12b Sensor 13a, 13b A / D conversion unit 14a, 14b Encoding unit 15a, 15b Sensor type generation unit 16 Superposition unit 17 Code synthesis unit 19 Turning signal extraction unit 20 Turning control unit 51a, 51b Superposition unit 52a, 52b Separation unit 53a, 53b Decoding unit 54a, 54b Turning control signal generation unit 55 Display switching unit 56 Display control unit 57 OSDC 58 Display device 59 VTR 60 OSDC control unit 61 Data storage unit 62 Printing device 63 Data storage Device 64 Camera rotation control button S11a, S11b Video signal

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 7/085

Claims (13)

[Claims] 1. A plurality of video cameras for monitoring each monitoring area, a video camera unit including an infrared sensor or the like for detecting intrusion of a suspicious object, and a display for displaying a video signal output from the video camera unit. A monitoring unit comprising a control unit such as a device and / or a recording device for recording the video signal thereof and a display device controlled by a sensor signal output from the sensor is provided when a sensor detects intrusion of a suspicious object or the like. In a multi-camera monitoring system that monitors a corresponding monitoring area, a superimposing unit attached to the video camera unit and superimposing a sensor signal on a predetermined horizontal scanning period of a vertical retrace period of the video signal,
A configuration is provided in the monitoring unit, in which a separating unit for separating the superimposed sensor signal is provided, and a sensor signal such as infrared light for detecting intrusion of a suspicious object or the like is superimposed on the output signal of the video camera and transmitted. A unique multi-camera surveillance system. 2. An encoder for digitally encoding the sensor signal, and a decoder for decoding the encoded sensor signal, wherein a signal to be superimposed on a predetermined period of the vertical blanking period is digitally encoded. The multi-camera surveillance system according to claim 1, wherein the system is a sensor signal. 3. A plurality of sensors are provided for each of said video cameras, and a sensor signal output from each of the sensors is transmitted so as to be superimposed on a separate horizontal scanning period of a vertical retrace period of the video signal. 2. The multi-camera surveillance system according to claim 1, wherein: 4. The sensor signal includes a sensor ID or
The multi-camera surveillance system according to claim 3, wherein a code indicating a sensor type is added and transmitted. 5. The multi-camera surveillance system according to claim 1, wherein a camera ID for identifying a video camera is transmitted in a predetermined horizontal scanning period of a vertical blanking period of the video signal. 6. A turning control signal generating section for generating and encoding a camera turning control signal in the monitoring section, and transmitting the encoded camera turning control signal to a predetermined horizontal line during a vertical blanking period of the video signal. The multi-camera surveillance system according to claim 1, wherein a superimposing unit for superimposing during a scanning period is provided, and transmission is performed to the video camera unit. 7. The turning control signal generator according to claim 6, wherein the transmitted sensor signal is obtained, and a turning control signal for the camera is generated based on the transmitted sensor signal. Multi-camera surveillance system. 8. The multi-camera surveillance system according to claim 7, wherein the turning control is performed to a different preset turning position according to the transmitted sensor signal. 9. The turning control signal generating section is provided with a switching section for switching between a camera turning control signal based on the sensor signal and a manually turning camera turning signal, so that the turning control of the camera is manually performed. The multi-camera monitoring system according to claim 7, wherein: 10. The monitoring unit includes an on-screen display controller (OSDC) that generates a character corresponding to the level of the sensor signal and superimposes the character on the video signal.
2. The multi-camera monitoring system according to claim 1, wherein characters corresponding to the level of the transmitted sensor signal and the like are superimposed and displayed on a display screen. 11. The monitoring unit according to claim 1, wherein a storage unit such as a hard disk for storing the sensor signal is provided, and the transmitted sensor signal is stored and stored.
The multi-camera surveillance system as described. 12. The multi-camera monitoring system according to claim 1, wherein the monitoring unit includes a print output unit for the sensor signal, and prints out the transmitted sensor signal. 13. The sensor according to claim 1, wherein the sensor attached to the video camera unit includes a temperature sensor.
The multi-camera surveillance system as described.