JPS6194665A - Abnormality monitor apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an abnormality monitoring device used for fire monitoring of large-scale structures such as air domes.

(Prior art) In recent years, practical use of ceiling structures using air domes has been considered for outdoor stadiums, exhibition halls, etc., and since they are indoor facilities, fire monitoring equipment is required in the same way as in ordinary buildings. must be established.

(Problem to be solved by the invention) However, in air dome equipment, the monitoring space is very large, so fire monitoring using conventional fire detectors requires installing the detector on the ceiling of the air dome. Since the signal line is installed by rotating, it cannot be put to practical use, and a new abnormality monitoring device such as fire is required.

(Means for Solving the Problems) The present invention has been made in view of the above-mentioned conventional problems. Detection and furthermore, there is a risk of false alarms if only monitored by a TV camera, so 9A
A humidity detector detects the temperature of the monitored area, and if the temperature of the area determined from the TV camera image is abnormal, it is determined that there is a fire.Furthermore, changes in brightness and hue may occur due to an intruder into the monitored area. Therefore, it is possible to reliably detect an abnormality such as a fire by determining whether the intruder's temperature is high or not based on the temperature detected by the radiation temperature detector.

(Example) FIG. 1 is a block diagram showing one embodiment of the present invention.

First, the configuration will be described. Reference numeral 1 denotes a television camera that photographs the monitoring area inside the air dome, and one or more TV cameras are installed depending on the size of the monitoring area. Reference numeral 2 denotes a video change identification unit that determines whether or not there is a change in the brightness or hue of the video signal obtained from the television camera 1, and identifies the location where the change has occurred.

This image change identification section 2 is configured to detect, for example, a television camera 1-
The monitored area that was withdrawn is divided into a plurality of sections, and by detecting changes in brightness or hue in each divided section, a position signal indicating the location where the change occurred is output.

3 is a radiation temperature detector that detects the temperature of the monitoring area;
If the viewing angle is the same as that of the TV camera 1, it is fixedly installed, and if the viewing angle is small, the radiant temperature is detected at the location where there is a change detected by the video change identification unit 2 from the video signal of the TV camera 1. Controls the direction of the device 3. 4 is a fire judgment I! that determines a fire based on the temperature detected by the radiation temperature detector 3! The fI processing unit outputs a fire determination signal when the detected temperature is equal to or higher than a predetermined fire threshold temperature Ts. Reference numeral 5 denotes an intruder determination processing unit that determines whether or not there is an intruder in the monitoring area based on the temperature detected by the radiation temperature detector 3. Normally, the temperature radiated from the human body is, for example, 30 to 40°C. , upper and lower threshold temperature T1 for detecting an intruder
．． T2 is set, and when the detected temperature is within the range of T1 to T2, an intruder detection signal is output. Reference numeral 6 denotes a display unit, which displays a position based on a position signal representing a location where there has been a change in brightness or hue identified by the video change identification unit 2, and indicates a fire based on a fire judgment signal from the fire judgment processing unit 4. An alarm is displayed, and furthermore, a theft alarm is displayed based on an intruder detection signal from the intruder determination processing section 5. Of course, the fire detection position signal and the fire alarm signal displayed on the display unit 6 may be used to direct the water nozzle toward the location of the fire in the monitoring area, thereby interlocking the fire extinguishing control.

Next, the operation of the embodiment shown in FIG. 1 will be explained with reference to the flowchart shown in FIG.

In a normal surveillance case, a video signal of a surveillance area photographed by a television camera 1 is given to a video change identification unit 2, and a block 7 detects whether or not there is a change in brightness or hue in each divided area in which the video range is divided. If there is an image change in the discrimination block 8, a position signal indicating the location where the image change occurred is output, and the detected temperature TX by the radiation temperature detector 3 of the abnormal location identified as a block is checked. . In the next determination block 10, if the detected temperature Demon King x is equal to or higher than the preset fire temperature TS, the process proceeds to block 11, where a fire alarm is displayed. On the other hand, when the temperature is lower than the fire temperature TS, the upper and lower limits of temperature T1 for intruder identification set in advance in the determination block 11. Compare the size with T2 and set the set temperature T1.
-T2, the process proceeds to block 12, where an intruder alarm is displayed, and a fire alarm is not displayed even if there is a change in brightness or hue of the video signal of the television camera. Of course, if the determination block 11 determines that the temperature is outside the set temperature range T1 to T2, the sclerotia display is not performed and the process returns to block 7 again.

Incidentally, in the above embodiment, fire and intruder judgments were made from the temperature detected by the radiation temperature detector 3, but in order to judge intruders, a dedicated theft detector, such as a hot wire theft detector, was installed. The presence or absence of an intruder may be determined from the detection signal of a hot wire type burglar detector. Furthermore, since the intruder determination process is performed to prevent false fire alarms, the signal may be used as a signal to prohibit the fire good news display without displaying the intruder alarm.

(Effects of the Invention) As explained above, according to the present invention, the occurrence and location of an abnormality such as a fire can be identified from changes in brightness or hue in the video signal of a television camera. Area abnormality monitoring can be realized with a simple equipment configuration.

In addition to abnormality monitoring based on video signals from television cameras, the presence or absence of a fire is determined based on the detected temperature at the abnormal location.Furthermore, even if there is a change in brightness or hue due to an intruder's video signal, it is possible to detect an intruder based on the detected temperature. Because the system detects that something is wrong, no false fire alarms are issued, and malfunctions due to causes other than fire can be prevented, greatly improving the reliability of abnormality monitoring.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the present invention, and FIG. 2 is a flow chart showing the operation of the present invention. 1: Television camera 2: Image change identification section 3: Radiation temperature detector 4: Fire judgment processing section 5: Intruder judgment processing section 6: Display section Patent applicant: Takenaka Corporation Same as above Hochiki Co., Ltd.

Claims (1)

[Claims] A television camera that photographs a monitoring area; a video change identification unit that identifies a location where there has been a change in brightness or hue from a video signal from the television camera; a radiation temperature detector that measures the temperature of the monitoring area; A fire determination processing section that processes the output of the temperature detector to determine a fire; an intruder determination processing section that determines an intruder; and the output of the video change recognition section, the fire determination processing output, and the intruder determination processing section output. An abnormality monitoring device comprising a display section that displays the type of abnormality and the location of the abnormality.