JPH0441033B2 - - Google Patents

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 the case of 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 and sending signals. Since it is difficult to lay the lines, it cannot be put into 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, and it is possible to identify areas where the brightness or hue has changed from the video signal of the viewing area captured by a television camera. Since there is a risk of false alarms if only a TV camera is used to detect and monitor the area, a radiation temperature detector is used to detect the temperature in the monitored area, and if the temperature of the area determined from the TV camera image is higher than a predetermined temperature. It is determined that it is a fire, and since changes in brightness and hue also occur due to an intruder into the monitored area, it is necessary to determine whether or not it is an intruder's temperature from the temperature detected by the radiation temperature detector to ensure that it is a fire or an intruder. This allows the type and location of the abnormality to be displayed.

(Embodiment) FIG. 1 is a block diagram showing an embodiment of the present invention.

First, to explain the configuration, 1 is a television camera that photographs the monitoring area that is the interior of the air dome.
One or more units may be installed depending on the size of the monitoring area. Reference numeral 2 denotes a video change identification unit that determines whether 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 unit 2 divides a monitoring area photographed by, for example, a television camera 1 into a plurality of sections,
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, and if it has the same viewing angle as the TV camera 1, it is installed fixedly; if the viewing angle is small, it detects a change in the image from the video signal of the TV camera 1. Identification part 2
Control is performed to direct the radiation temperature detector 3 to the location where the detected change occurred. 4 is radiation temperature detector 3
This is a fire determination processing unit that determines a fire based on the detected temperature of the fire, and 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 the presence or absence of an intruder in the monitoring area based on the temperature detected by the radiation temperature detector 3, since the temperature radiated from the human body is usually 30 to 40 degrees Celsius. , upper and lower threshold temperatures T1 and T2 for detecting an intruder are set, and when the detected temperature is within the range of T1 to T2, an intruder detection signal is output. 6 is a display unit, which displays a position based on a position signal indicating a location where a change in brightness or hue, etc., identified by the image change identification unit 2;
A fire alarm display is performed based on a fire determination signal from the fire determination processing section 4, and a theft alarm display is performed 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 the normal monitoring state, the video signal of the monitoring area photographed by the television camera 1 is detected by the video change identification unit 2.
Block 7 identifies the presence or absence of a change in brightness or hue in each divided area of the video range, and if there is a change in the image in judgment block 8, a position signal indicating the location of the change in image is output. At the same time, the detection on and Tx of the abnormal location identified by the radiation temperature detector 3 in block 9 are checked. In the next judgment block 10, if the detected temperature Tx is higher than the preset fire temperature Ts, block 1 is detected.
Proceed to step 1 to display a fire alarm. On the other hand, when the fire temperature is lower than the fire temperature Ts, the upper and lower limit temperatures T1 and T for intruder identification preset in the determination block 11 are determined.
2, and if the temperature is within the range of set temperatures T1 and T2, the process proceeds to block 12 to display an intruder alarm, and even if there is a change in brightness or hue of the video signal from the television camera, the fire alarm will not be displayed. Don't do it. Of course, the set temperature T is determined in the determination block 11.
If it is outside the range of 1 to T2, no alarm is displayed and the process returns to block 7 again.

Incidentally, in the above embodiment, fire and intruder judgments were made based on the temperature detected by the radiation temperature detector 3, but for intruder judgment, a dedicated theft detector,
For example, a hot-wire theft detector may be installed, and the presence or absence of an intruder may be determined from the detection signal of the hot-wire theft detector. Furthermore, since the intruder determination process is performed to prevent false fire alarms, the signal may be used as a signal to prohibit displaying a fire alarm without displaying an 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 or an intruder can be identified from changes in brightness or hue in the video signal of a television camera. Abnormality monitoring over a wide monitoring area can be realized with a simple equipment configuration.

In addition to monitoring abnormalities based on video signals from television cameras, we also determine that there is a fire if the detected temperature at an abnormal location is higher than a predetermined temperature, and further detect an intruder based on the detected temperature based on changes in brightness or hue caused by the intruder's video signal. The reliability of abnormality monitoring can be greatly improved by detecting the presence of an intruder and accurately distinguishing and displaying whether it is a fire or an intruder.

[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...TV camera, 2...Video change identification unit,
3... Radiation temperature detector, 4... Fire judgment processing unit,
5... Intruder determination processing unit, 6... Display unit.

Claims (1)

[Claims] 1. A television camera that photographs the monitoring area, an image change identification unit that identifies areas where brightness or hue has changed from the video signal from the television camera, a radiation temperature detector that measures the temperature of the monitoring area, and A fire determination processing section that processes the output of the radiation temperature detector to determine a fire; an intruder determination processing section that determines an intruder; and an output of the video change recognition section, a fire determination processing output, and an 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.