JPH02138700A - Monitor device - Google Patents

Abstract

PURPOSE:To detect any type of fire at its early stage by judging the break out of the fire from the sense and video signals of 1st and 2nd sensors which sense the smoke and the flames respectively. CONSTITUTION:When a fire or the like breaks out, a fire sensor works to transmit a sense signal (a) or (b) to a control part 4. The part 4 receives the signal (a) or (b) actuates a monitor camera 3 and at the same time judges one of both sensors that worked. If it is judged that the 1st fire sensor 1 worked, the part 4 carries out a smoke type signal process. While a heat source type signal process is carried out in case the 2nd fire sensor 2 worked. Thus it is possible to detect any type of fire from a fire-like signal (c).

Description

[Detailed description of the invention] Industrial applications The present invention relates to a monitoring device used in the disaster prevention field.

2. Description of the Related Art In the conventional art, it is common to determine that a fire is occurring based on the activation of a fire detector, and then randomly spray water or extinguishing agent throughout the space from fire extinguishing equipment such as sprinklers.

Problems to be Solved by the Invention This type of system has disadvantages, such as the inability to reliably and adequately extinguish fires when a fire detector malfunctions or when a fire requires concentrated injection of extinguishing agent. There is.

Furthermore, whether the activation of the sensor is due to force majeure (e.g. cigarette smoke, heat from Nutop, etc.) or
There are drawbacks such as the inability to determine whether a real fire is occurring, which affects early firefighting efforts.

The present invention solves the problems encountered in the prior art, such as detecting fires due to malfunctions and fire causes, and provides a monitoring device that can carry out reliable and sufficient fire extinguishing operations.

Means for Solving the Problems The present invention includes a first sensor installed in a building or the like that detects smoke and sends out a sensing signal, a second sensor that senses flame and sends out a sensing signal, a surveillance camera that monitors the interior space of the building and transmits a video signal; A fire is determined from the second sensing signal and the video signal.

Operation The present invention determines which of the first sensor and the second sensor is activated based on the sensing signal from each sensor,
Depending on the type of detected signal, the signal processing method for images captured by surveillance cameras is changed to make appropriate decisions regarding fires.

Example A specific example of the present invention will be described.

FIG. 1 shows a specific embodiment of the present invention. Reference numeral 1 denotes a first fire detector, which senses smoke generated at the initial stage of a fire and sends a sensing signal 1 to a control section. , 2 is a second fire detector that detects fires such as oil systems that generate flames from the beginning, paper and wood fires that gradually generate flames, etc., and sends a sensing signal to the control unit.

Reference numeral 3 denotes a surveillance camera, which sends a video signal C of the fire scene to the control section in response to an instruction from the control section which detects the occurrence of a fire by the activation of the first and second fire detectors.

Reference numeral 4 denotes a control unit, which is a circuit that detects flames by switching processing depending on the type of sensing signal a or b from the video of the fire scene sent from the surveillance camera 3.

Before explaining the specific operation, the internal operation of the control section 4 will be explained.

The control section 4 includes a signal processing switching section and a signal processing section (not shown). The signal switching unit determines which fire detector is activated and provides an instruction to the signal processing unit.

The signal processing section has two processing methods. One is
Through signal processing for smoke, a unique configuration of smoke is obtained from the video signal C captured by the surveillance camera 3. ) or movement and determines it as a fire. The other method is a heat source processing method that detects color temperature, color components, ultraviolet rays, infrared rays, or flame fluctuations and movements from the video signal C captured by the surveillance camera 3 to determine a fire. We are prepared. These processes are arbitrarily switched according to instructions from the signal switching section to execute signal processing.

Next, the specific operation will be explained.

When something that looks like a fire occurs, a fire detector is activated.
The sensor 9a or the sensing signal is sent to the control section 4. The control unit 4 that has received the sensing signal a or b activates the surveillance camera 3 and determines which sensor is activated. As a result of the determination, if the first fire detector 1 is activated, the signal processing unit is instructed to perform smoke processing type signal processing. Furthermore, if the second fire detector 2 is activated as a result of the determination, the signal processing unit is instructed to perform heat source type signal processing. The signal processing unit processes the video signal C of the fire scene received from the surveillance camera by one of the signal processing methods described above, processes the characteristics of the fire, and detects the fire from the video signal C that appears to be a fire. Works in a way.

i.e. fires that occur gradually (e.g. wood, paper, etc.)
At first, smoke is generated, and then when the heat reaches the ignition point, it turns into flames and the fire spreads. Among these phenomena, by paying attention to smoke, we can detect fires in their early stages and begin extinguishing them.

In addition, for oil fires that suddenly reach the ignition point, pay attention to the fact that they emit high heat sources and flames, and help detect and extinguish them at an early stage.

As is clear from the above explanation, it is possible to solve fires and malfunctions that could not be detected using conventional technology, and even when a fire occurs, by switching the signal processing method, the fire can be detected at an early stage. .

Effects of the Invention The present invention can detect any fire regardless of the type of fire detector, prevent malfunctions, and help extinguish the fire in the early stages.

Moreover, it can be realized with a simple configuration, and furthermore, the type of detector can be arbitrarily selected, so that a versatile fire system can be constructed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a detailed diagram of the present invention. 1...First fire detector, 2...Second
Fire detector, 3... Surveillance camera, 4...
...Control unit.

Claims (1)

[Claims] A first sensor installed in a building etc. detects smoke and sends a sensing signal, a second sensor detects flame and sends a sensing signal, and a second sensor monitors the interior space of the building and sends a video signal. 1. A monitoring device comprising a monitoring camera that sends out signals, and determining whether there is a fire based on the first and second sensing signals and the video signal.