JPH04131794A - Vital body image sensing device - Google Patents

Abstract

PURPOSE:To sense a vital body overwhelmed by smoke due due fire etc. effectively by performing sensing through scanning of far infrared rays in a specific wave-length range. CONSTITUTION:A vital body image sensing device A comprises an infrared radiation thermometer 1, which senses far infrared rays of a vital body (victim of accident) and converts into electric signal in accordance with the energy of the infrared rays, and a scanning mirror 3 mounted in a scan driving device 2 of galva-scan system etc., and is installed on the ceiling 4a of a room 4. This scanning mirror 3 is located ahead a sensing window in the infrared radiation thermometer 1. Because the thermometer 1 senses only that one point in the room 4 which is focused by an internal lens system, sensing points are scanned one by one with the scanning mirror 3 ahead the thermometer 1. The temp. distribution obtained by this scan is measured, and victim 5 overwhelmed by smoke in the room 5 is sensed. The scan ray signal obtained is sent for example to a monitor device 7 of a central monitoring room 6, and the total situation of the room 4 is displayed as image data based on the temp. distribution.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a living body image detection device that detects a living body as an image (a living body image) from within smoke caused by a fire or the like.

[Summary of the invention]

The present invention provides a living body image detection device configured to detect living bodies as images from within smoke, including a far-infrared detector that converts far-infrared rays in a predetermined wavelength band into electrical signals, and a far-infrared detector that converts far-infrared rays in a predetermined wavelength band into electrical signals. By having a scanning mirror that scans the detection area two-dimensionally, it is possible to efficiently detect living organisms scattered by smoke caused by fires, etc., and it is also useful for security systems related to lifesaving. This makes it possible to realize lower prices.

(Prior Art) In general, the main cause of death of living organisms, especially humans (victims), in fires is often due to exposure to smoke.

Recently, due to the heavy use of new building materials, when a fire breaks out, victims often die from toxic gases etc. from the new building materials. For this reason, there is an urgent need to quickly find and rescue victims who are covered in smoke. Conventionally, firefighters bring in infrared imaging devices to search for victims, or call out to find victims. A method is being used to find out.

[Problem to be solved by the invention]

However, with conventional methods, if the victim is unconscious due to being engulfed by smoke, it is difficult to find the victim, and it is difficult to find the victim if the victim is unconscious due to smoke. When a fire breaks out in a high-rise building, it is inefficient and time-consuming for several firefighters to search for victims who are covered in smoke, and this poses an inconvenience in that it impedes urgent rescue operations. be.

Additionally, infrared imaging devices (e.g. thermography devices, infrared CCD cameras, etc.) exist as devices for image processing and detection of victims from within smoke, but this device itself
It is very expensive, increases the cost of life-saving security systems, and is difficult to popularize.

The present invention has been made in view of the above points, and its purpose is to be able to efficiently detect victims who are covered in smoke generated by a fire, etc., and to improve the security system for saving lives. It is an object of the present invention to provide a living body image detection device that can realize low cost.

[Means for Solving the Problems] The present invention provides a living body image detection device (A) configured to detect a living body (5) from within smoke as an image (a living body image). The device includes a far-infrared detector (1) that converts a signal into an electrical signal, and a scanning mirror (3) that two-dimensionally scans a detection location by the far-infrared detector (1).

[Operation] According to the configuration of the present invention described above, the detector (1) and the scanning mirror (
3) makes it possible to detect the entire room (4) and quickly detect living organisms (5) that are covered in smoke.In addition, the electric signal from the detector (1) is output as a so-called scanning line signal by scanning with the scanning mirror (3), so if this scanning line signal is supplied to a monitor device (7) such as the central monitoring room (6), the room (4)
) The entire situation can be displayed as image data from the monitor device (7), and the existence of the living body (5) covered in smoke and its location can be immediately known.

Furthermore, since an inexpensive infrared radiation thermometer, for example, can be used as the detector (1), the cost of a security system related to lifesaving can be reduced, and widespread use can be expected.

[Example] Hereinafter, the present invention will be described in detail with reference to FIGS. 1 to 3.

FIG. 1 is an explanatory diagram showing the configuration of a living body image detection device (A) according to this embodiment and its usage state.

This living body image detection device (A) consists of an infrared radiation thermometer (1) that detects the far infrared rays of the living body (victim) and converts it into an electrical signal corresponding to the energy of the infrared rays, and a scanning system such as the Garha scan method. Scanning mirror (3) mounted on drive (2)
It is installed on the ceiling (4a) of the room (4). In this case, the scanning mirror (3) is installed in front of the detection window of the infrared radiation thermometer (1).

Infrared radiation thermometers (1) include, for example, pyroelectric detectors that utilize the so-called pyroelectric effect, in which spontaneous polarization changes when a temperature change occurs, and the amount of change appears as a surface charge, or a pyroelectric detector that responds to temperature changes. A detector sensitive to long-wavelength far-infrared rays, such as a thermistor bolometer whose resistance value changes as the temperature changes, is optimal. In addition, the wavelength band used is a wavelength band that is not absorbed by carbon dioxide gas, water vapor, other toxic gases, etc.
Preferably, 13 μrrl is used. Unlike conventional thermography detectors, these pyroelectric detectors and thermistor bolometers do not require cooling with liquid nitrogen, etc. In particular, pyroelectric detectors generate an electrical signal only when a temperature change occurs. Furthermore, since there is no need to provide a chopper, it is very inexpensive and easy to handle. others,
As the radiation thermometer (1), a detector using Pb5e or the like with two convenient electronic cooling units may be used.

In addition, since the infrared radiation thermometer (1) detects only one point in the room (4) that is focused by the internal lens system, in this example, the infrared radiation thermometer (1) is The detection location is sequentially scanned using a scanning mirror (3) installed in the area. Then, measure the temperature distribution obtained by this scanning,
A victim (5) covered in smoke is detected in a room (4). In particular, in this example, the electric signal from the infrared radiation thermometer (1) is made to correspond to the scanning by the scanning mirror (3) and is output as a scanning line signal as image data. (6), and the monitor device (7) can display the entire situation of the room (4) as image data based on temperature distribution. In addition, for automation, a smoke detector installed separately (
It is effective from the point of view of security if the living body image detection device (A) is operated in conjunction with the device (not shown).

Next, we will mainly explain the case where a pyroelectric detector is used as the infrared radiation thermometer (1). In the case of this pyroelectric detector,
A good time constant for S/N is about 10 m5ec. Also,
In order to detect the victim (5), for example, if the size of the room (4) is approximately 100 m" (10X 10+++"), a resolution of about 1000 points (33 vertically x 33 horizontally) (approximately 30 x 30 aa") is required. It can be detected by scanning with
Scanning the room (4) takes about 10 seconds to complete, taking into account the time constant. It turns out that this time is much shorter than it would take for a firefighter to search with an infrared imaging device.

Further, the victim (5) who is surrounded by smoke usually moves within the room (4) to avoid the smoke. Therefore, by comparing the image scanned at the first time and the image scanned at the second time, the detection of the victim (5) becomes more accurate. As a method of comparing images, for example, as shown in Fig. 2, if there is a victim (5) and a high-temperature object (8) such as a stove in a room (4), the monitor screen ( 9) Which one is the victim above (5)
It may not be possible to determine whether

Therefore, a second scan is performed after a predetermined period of time has elapsed.

In the illustrated example, during the first scan (see FIG. 2A),
It is assumed that the victim (5) is standing, and that the victim (5) is falling down during the double-double scan (see Figure 2 B). Then, by taking the difference between the image data obtained in the second scan and the image data obtained in the first scan, as shown in Figure 2C, we can see that the high temperature object (8) such as a stationary stove The image disappears, and only the image of the moved victim (5) remains as a low temperature display (indicated by a broken line) and a high temperature display (indicated by a solid line). In this way, the presence of the victim (5) can be accurately detected without confusing the victim (5) with the high-temperature object (8).

Furthermore, in places with large living spaces, such as hotel lobbies and banquet halls, one living body image detection device (A) may not be enough. In this case, as shown in FIG. 3, a plurality of one-body image detection devices (A
) are arranged in a matrix, each biological image detection device (A)
The image data of each living body image detection device (A) may be displayed randomly or cyclically on a monitor device in the central monitoring room.

As mentioned above, according to this example, the infrared radiation thermometer (1) and the scanning mirror (3) make it possible to detect the entire room (4) in a short time. Victim (5) covered in smoke can be detected as early as 2. Furthermore, since the electrical signal from the radiation thermometer (1) is output as a so-called scanning line signal by scanning with a scanning mirror (3), this scanning line signal is transmitted to, for example, a monitor device (7) in a central monitoring room (6). By supplying the information to be able to.

Furthermore, since an inexpensive pyroelectric detector or the like is used as the detector of the infrared radiation thermometer (1), the cost of the security system related to saving lives can be reduced.

In the above embodiment, the infrared radiation thermometer (1) and the scanning mirror (3) were installed separately on the ceiling (4a), but in addition, the infrared radiation thermometer (1) and the scanning mirror (3) were installed separately on the ceiling (4a). The mirror (3) may be housed in one housing and installed on the ceiling (4a) or the like.

[Effects of the Invention] According to the living body image detection device according to the present invention, a living body that is covered in smoke caused by a fire or the like can be efficiently detected, and
It is possible to reduce the cost of security systems related to lifesaving.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the configuration of a living body image detection device according to this embodiment and its usage state, FIG. 2 is an explanatory diagram showing an example of image processing according to this embodiment, and FIG. It is an explanatory view showing an example of use. (A) is a living body image detection device, (1) is an infrared radiation thermometer, (
3) is the scanning mirror, (4) is the room, (5) is the victim, (6)
is a central monitoring room, and (7) is a monitor device. Agent Hidemori Matsukuma

Claims (1)

[Scope of Claims] A living body image detection device configured to detect a living body from within smoke as an image, comprising: a far-infrared detector that converts far-infrared rays in a predetermined wavelength band into an electrical signal; A living body image detection device comprising a scanning mirror that two-dimensionally scans a detection point by a device.