JPH0915038A - Ember detector - Google Patents

Abstract

PURPOSE: To provide an embers detector capable of detecting the presence or absence of embers after a fire extinguishing activity. CONSTITUTION: The embers detector comprises an infrared detector 1 for detecting the infrared ray generated from embers, and an output unit (visible detector 4, a voice modulator 5 and a speaker 6) for outputting the detected result of the detector 1. The detector further comprises a beam marker 7 for generating a beam for indicating the direction (more specifically, the direction of the optical axis of the detector 1) of the embers detector.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an afterburning detector capable of detecting the presence or absence of afterburning after a fire fighting activity.

[0002]

2. Description of the Related Art When a fire breaks out, a firefighter heads to the place where the fire started on the basis of a report and when the fire arrives, the fire fighting activities are carried out, and when the fire is extinguished, it can be said that the fire fighting activities have ended. However, it is difficult to judge whether the fire was completely extinguished. This is because the presence or absence of the afterglow of a fire was only empirically judged by the firefighters from the situation at the site, and there is no rational basis to objectively indicate whether the afterglow is completely gone. It was judged mainly by the subjectivity of a relatively experienced person called a veteran among the members on the scene.

[0003]

By the way, in the prior art, since it was judged by the firefighter's subjectivity whether or not it could be said that the afterburn was completely eliminated, there was a possibility that a judgment error might occur. There was a problem. To elaborate on this point, it is true that the long-term experience of firefighters strengthens the judgment of the presence or absence of afterburn, and the judgment of experienced people cannot be neglected.

However, no matter how experienced a fire brigade member is, his / her judgment may be deteriorated due to the physical condition and worries. Then, when the judgment was lowered, the judgment error was inflicted and the fire extinguishing activity was terminated, so the fire that should have been extinguished once again became more intense due to the afterburning, which caused enormous damage. It may also happen that there are no veterans on the scene who can accurately judge the presence or absence of residual burning. Because firefighters work on a shift basis. In such a case, as a matter of course, it may not be possible to make an accurate judgment. In addition, it is difficult to visually confirm the unburned residue such as wood chips under the galvanized iron.

Of course, if an accurate judgment cannot be made, even if it is judged that the fire is extinguished and there is no danger of the afterburning, the fire-extinguishing activity continues, and even if anyone judges perfectly, there is no possibility of the afterburning. It can be said that the fire should be extinguished until it can be determined that it is. However, depending on the scale of the fire, it may not be possible for one fire department to stay in one place for a long time and continue extinguishing fire, and if it is necessary to move to the next place immediately after extinguishing it, it is necessary to carry out new fire extinguishing activities. is there. In such a case, it is necessary to promptly and accurately judge the presence or absence of residual burning, but it has been difficult in the past to do so.

The present invention has been made to solve such a problem, and provides a portable residual burning detector capable of objectively determining the presence or absence of residual burning based on a physical detection result. The purpose is to provide.

[0007]

According to a first aspect of the present invention, there is provided an afterglow detector having an infrared detector for detecting the afterglow, and an output section for processing the output of the infrared detector and outputting the detection result. Is characterized by. The afterglow detector of claim 2 is the same as that of claim 1.
The afterglow detector of (1) has a beam marker that generates a beam indicating the direction of the infrared detector.

[0008]

According to the afterburning detector of the first aspect, when there is any afterburning, the surrounding temperature is higher and the detection output of the infrared detector becomes larger than when there is no afterburning. Therefore, it is possible to physically detect the degree of the temperature of the detection target by the output of the output unit and objectively recognize it, and it is possible to judge the presence or absence of the afterburn. According to the afterburning detector of claim 2, since the beam marker that generates the beam indicating the direction of the afterburning detector, more specifically, the direction of the infrared detector, is used, the infrared generator can be detected by the beam. You can recognize if you are facing. Therefore, it is possible to accurately recognize the location of the current target of the residual burn detection by the beam.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. FIG. 1 is a circuit block diagram showing one embodiment of the afterglow detector of the present invention. In the drawings, reference numeral 1 denotes an infrared detector, which detects infrared rays generated from the afterglow of a fire. Reference numeral 2 is a preamplifier for amplifying the output signal of the detector 1, 3 is an output signal of the preamplifier 2, that is, a log amplifier for logarithmic amplification for expanding the temperature detection amount, and 4 is an output signal of the log amplifier 3. The level of the output signal is displayed by a display as a visual display means, for example, by a liquid crystal or by a plurality of light emitting diodes.

Reference numeral 5 denotes an audio modulator which causes the speaker 6 to perform an audible display, and controls the pitch or the volume, the intermittent frequency of the intermittent sound, its duty ratio, etc. according to the amount of the output signal of the log amplifier 3. A voice signal that allows the user to determine the temperature level is output to the speaker 6. The speaker 6 generates a sound according to the received sound signal. Reference numeral 7 denotes a laser generator, which generates a laser beam serving as a mark so that the direction of the optical axis of the infrared detector 1 can be understood. In particular,
The laser generator 7 is positioned so that the generated laser beam coincides with the optical axis of the infrared generator 1.
It should be noted that the circuit as shown in FIG. 1 is housed in a container of a size that can be held by hand, and for example, all or some of the firefighters can carry it so that the presence or absence of afterglow can be judged based on the afterglow detector. To do.

The use of this afterglow detector will be described.
When it seems that the fire has been extinguished and the fire has been extinguished, the firefighter directs the afterglow detector in a direction such that the infrared detector 1 is directed to a location where there is a possibility of afterglow at the fire spot.
Specifically, the afterglow detector is moved so that the laser beam serving as a mark faces the detection target. Then, since the spot where the laser beam hits is the spot where the optical axis of the infrared detector 1 faces, the temperature of the detection target can be detected. Then, when infrared rays from that portion are detected by the infrared detector 1, the output of the infrared detector 1 becomes a value corresponding to the temperature of that portion, the value is amplified by the preamplifier 2, and further the log amplifier 3 Is logarithmically compressed by and input to the display 4 and the audio modulator 5.

The display 4 provides an analog or digital display so that the output of the log amp 3 can be visually recognized. Therefore, it is possible to determine from this display whether or not there is an afterburn. Even if it is not afterburning, it is in a state close to afterburning,
It is possible to judge whether there is no afterglow (complete extinction). Even in the case of afterburning, it can be judged from the temperature change with the surroundings whether the afterburning is strong or weak and relatively close to the extinguishing state.

Further, the speaker 6 receiving the output of the voice modulator 5 does not only generate a warning sound when there is an afterburn, but also becomes louder or higher as the temperature of the afterburn becomes stronger, or an intermittent sound occurs. Since a sound with an increased intermittent frequency or duty ratio is generated, the extent of the afterburning temperature can be roughly determined by the loudness, pitch, and intermittent frequency or duty ratio of the intermittent sound.

[0014]

According to the residual burn detector according to the first aspect of the present invention, when there is residual burn, the ambient temperature is higher and the detection output of the infrared detector becomes larger than when there is no residual burn. Therefore, the degree of the temperature of the detection target can be objectively recognized by the output of the output unit, and the presence or absence of the afterburn can be determined. Therefore, it is possible to objectively determine the presence or absence of the afterglow, and it is possible to avoid the risk of causing a misjudgment regarding the presence or absence of the afterglow, which causes the afterglow to expand again and cause a large fire, resulting in a large damage. According to the afterburning detector of claim 2, since the beam marker that generates the beam indicating the direction of the afterburning detector, more specifically, the direction of the infrared detector, is used, the infrared generator can be detected by the beam. You can recognize if you are facing.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram showing an embodiment of an afterburning detector of the present invention.

[Explanation of symbols]

 1 Infrared detector 4, 5, 6 Output section 7 Beam marker (laser generator)

Claims (2)

[Claims] 1. An infrared detector for detecting infrared rays generated from afterglow after a fire is extinguished, and an output unit for processing the output of the infrared detector and visually and / or audibly outputting the detection result. And an afterglow detector characterized by having 2. The afterburn detector according to claim 1, further comprising a beam marker for generating a beam for indicating the direction of the infrared detector.