JP2001305026A - Detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detector easily detecting condition of a closed space. SOLUTION: This detector having a gas sensor connected to the closed space having a vent port and checking whether a biological object is in it or not on the basis of an output from the gas sensor is provided with a cover part covering the vent port of the closed space, and a sponge type contact face brought into contact with a flat face part provided with the vent port throughout is arranged in the opening of the cover part. When the cover part is connected to the gas sensor, an atmosphere inside the closed space is introduced into the gas sensor via the vent port and the cover part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detecting device for detecting, for example, the presence or absence of a living body from an atmosphere such as a closed space.

[0002]

2. Description of the Related Art Heretofore, in places where unoccupied people are to be confirmed, such as in a warehouse, the presence of a person has been determined by detecting a sound of a predetermined frequency due to a heartbeat or infrared rays based on body temperature. It is difficult to externally sense the inside of a warehouse or the like in such a situation, and it is necessary to provide a sensor inside in advance.

[0003]

If it is not a closed space in which sensors are installed in advance, it will be difficult to investigate the inside of the space. It is not possible to determine if a person is trapped in the area, and rescue operations will be delayed.

In addition, it is difficult to search for a child or a pet in a warehouse or the like where entry and exit are impossible.

[0005] There is a demand for an apparatus that can easily detect such a closed space situation.

[0006]

In view of the above, a first aspect of the present invention includes a gas sensor connected to a closed space having a vent, and detects whether a living organism is present based on the output of the gas sensor. The apparatus comprises: a cover portion that covers a vent of the closed space; and a sponge-shaped contact surface portion that abuts a flat portion provided with the vent at an opening of the cover portion, wherein the cover portion includes the gas sensor. And the atmosphere in the closed space is introduced into the gas sensor through the vent and the cover.

According to a second aspect of the present invention, there is provided a detecting device for detecting presence or absence of a living body based on an output of the gas sensor, wherein the gas sensor is connected to a closed space having a vent. A cover portion to be covered, and a contact surface portion formed by a magnet chain that abuts on a metal plate provided with the ventilation hole at an opening of the cover portion. The gas sensor is introduced into the gas sensor through the vent and the cover.

In a third aspect of the present invention, in the detection device for detecting presence or absence of a living body, the detection device includes a gas sensor connected to the sampling pipe, and a fan for sucking an atmosphere through the sampling pipe. The probe is formed in a flexible probe inserted into the gap, and the atmosphere at the tip of the probe is sucked by the fan and introduced into the gas sensor.

Still further, according to a fourth aspect of the present invention, there is provided a gas sensor connected to the closed space, and a fan device for introducing the atmosphere of the closed space to the gas sensor, wherein the living body is based on an output of the gas sensor. The fan device is characterized in that the fan device is driven by a built-in power supply of the detection device and is provided with an automatic stop means for stopping the fan device at a predetermined time from the start.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic structural view showing a closed space detecting device as a first embodiment utilizing the present invention.
Reference numeral 1 denotes a container as a closed space, which is provided with a vent 2 on a wall portion thereof. Reference numeral 3 denotes a cover portion that covers the ventilation port 2, and the cover portion 3 includes a contact surface portion 4 that hermetically seals the opening. 5 is a suction fan, 6 is a CO2 gas sensor (carbon dioxide sensor) connected to the suction fan 5, and 7 is C
A display panel 8 for displaying the presence of a living body or the like based on the detection value of the O2 gas sensor 6 is provided. A power supply device 8 supplies power to the suction fan 5, the CO2 gas sensor 6 and the display panel 7.

Normally, the vent 2 of the container 1 is formed as shown in FIG. That is, the outer wall surface of the container 1 is bent so that the metal plate repeats irregularities, and from the flat portion 11 in the concave portion, the convex portion 21 is formed so as not to protrude from the convex portion, An opening 22 having an insect repellent net is formed on the lower surface thereof. Usually, a plurality of such openings 22 are provided so that the inside of the container 1 is ventilated.

The structure of the cover 3 in the first embodiment is shown in detail in FIG. The cover portion 3a is large enough to cover the convex portion 21 of the ventilation port 2 and is
It is resin-molded so that it can be inserted between the outer periphery of the container 1 and the convex portion of the wall surface of the container 1, and the contact surface portion 4a is made of a flexible sponge or the like. And
When the cover portion 3a covers the convex portion 21 of the ventilation hole 2, the contact surface portion 4a comes into contact with the flat surface 11 on which the ventilation hole 2 is provided. Due to the contact surface portion 4a, the cover portion 3a is brought into close contact with the flat portion 11 due to the negative pressure when the suction fan 5 to be described later is sucked, and is firmly joined.

An implementation method of the detection device according to the first embodiment will be described. When a worker is trapped in the container 1 or there is a possibility that a pet dog has lost his way, it is necessary to detect the situation inside the container 1. At that time, as shown in FIG. 1, the cover 3, the suction fan 5, the CO2 gas sensor 6, the display panel 7, and the power supply device 8 are assembled and prepared. When the detection device is configured as described above and the suction fan 5 is started, the atmosphere inside the container 1 reaches the CO2 gas sensor 6 through the vent 2 and an output from the output indicates whether or not a living body exists in the container 1. The determination can be made based on the level displayed on the panel 7.

The average human breathing CO2 concentration is about 4.4%, the average number of breaths per minute is about 16 times, and about 20 liters of CO2 gas is discharged per person per hour. As an experimental example, when two persons stayed in a room having a volume of about 21 cubic meters for 2 hours, the atmosphere at that place detected a CO2 concentration of about 0.4%. Naturally, the ventilation efficiency varies depending on the room environment, and there is an increase or decrease depending on the duration or the like. However, it is clear that the CO2 concentration varies depending on the presence of a person.

A sensor based on a photoacoustic method can be used as the CO2 gas sensor 6. The principle of this detection is that a specific wavelength is used when the target gas is irradiated with infrared rays (CO2 is about 4.3 micrometers). Absorption occurs and the internal energy of gas molecules increases and is measured as a pressure rise in a sealed container.Specifically, it is possible to blink an infrared light source at a predetermined cycle and measure a small pressure change with a microphone. Yes, this output is proportional to the gas concentration. The photoacoustic method and the non-dispersive infrared method have higher selectivity than other solid electrolyte methods and light wave interference methods, and are not affected by interference gas.

Next, a second embodiment will be described. The second embodiment has substantially the same configuration as that of the first embodiment, but the cover 3b and the contact surface 4b are shown in FIG. 4 as different parts.

The cover portion 3b of the second embodiment is a bag having a size to cover the convex portion 21 of the ventilation hole 2 similarly to the cover portion 3a. It can be inserted between the convex parts of the wall. And
The contact surface portion 4b is a magnet chain provided on the periphery of the opening of the cover portion 3b. When the cover portion 3b covers the convex portion 21 of the ventilation hole 2, the contact surface portion 4b is On the other hand, it comes into contact with one surface by magnetic force. In this contact surface portion 4b, the cover portion 3b is tightly fixed to the flat portion 11 without suction of the suction fan 5.

Further, the advantage of the cover 3b and the contact surface 4b in the second embodiment is that even when the vent 2 of the container 1 is not shaped as shown in FIG. Can be brought into close contact with each other by magnetic force, and the periphery thereof does not have to be flat.

In the first and second embodiments, the closed space is not limited to the container 1, but it is sufficient if the same vent is provided in a warehouse or a room.

Next, FIG. 5 shows a schematic configuration of a detection device as a third embodiment utilizing the present invention. 31
Is a sampling tube formed in the flexible probe 32, and 33 and 34 are a fiberscope and a light source fiber provided in the probe 32 similarly to the sampling tube 31. The sampling tube 31 has a terminal connected to a CO 2 gas sensor 35 and a suction fan 36. Further, the fiber scope 33 is provided with the probe 3
2. An eyepiece 37 is provided so that the image can be seen from the tip.
The light source fiber 34 is connected to a light source 38 so that the image can be seen. The gas sensor 35 and the suction fan 3
6 is the same as the gas sensor 6 and the suction fan 5 in the first embodiment, and any connection order may be on the probe 32 side.

FIG. 6 shows a cross-sectional structure of the probe 32 shown in FIG. In the probe 32, a sampling tube 31,
In addition to the fiberscope 33 and the light source fiber 34,
Four control wires 39 are provided. The control wire 39 can be projected upward and downward and left and right by the two knobs 41 a and 41 b of the tip control device 40. By the protrusion of the wire 39, the traveling destination of the probe 32 can be selected. Particularly, in a collapsed building, in rubble, or the like, the selection of the traveling direction is indispensable.

A method of implementing the detection device according to the third embodiment will be described. When there is a possibility that the victim is trapped in a collapsed building, the probe 32 is inserted through a gap in the building. At this time, the operator can see the image of the tip position of the probe 32 from the eyepiece 37 by the fiber scope 33 and the light source fiber 34, and approach the victim from a change in the output of the gas sensor 35 via the sampling tube 31. You can check if it is. And, for example, the gas sensor 3
When the output of No. 5 decreases, it is determined that the probe 32 is moving away from the victim, and when the probe 32 is retracted and pushed again,
By freely projecting the control wire 39, the traveling direction of the tip of the probe 32 is selected and pushed in a different direction. Then, by proceeding while selecting the direction in which the output of the gas sensor 35 increases, the victim approaches the victim and can be confirmed by the fiberscope 33.

Next, FIG. 7 shows a schematic configuration of a detection apparatus according to a fourth embodiment. This fourth embodiment is almost the same as the third embodiment, and different parts are a fiberscope. Instead of 33 and the light source fiber 34, a CCD camera 44 and an LED 45 as a light source are provided at the tip of the probe 32. by this,
A monitor 46 for viewing the image of the CCD camera 44;
A power supply 47 for operating the CD camera 44 and the LED 45 is provided.

Next, FIG. 8 shows a schematic configuration of a detection device according to a fifth embodiment. The basic configuration of the fifth embodiment is the same as that of the third embodiment, but differs therefrom. The part is the fiber scope 3 in the third embodiment.
3. Without using the light source fiber 34 and the control wire 39, the operator can use the probe 3
2 is to be pushed forward. Therefore, the tip of the probe 32 is formed with a sharp-pointed pile-shaped head portion 51, and the handle 5 is attached to the rear end of the head portion 51.
2 are formed. That is, the operator grips the handle 52 and pierces the head portion 51 into the rubble to enter the inside thereof, and captures the internal atmosphere from the plurality of small holes 53 formed on the outer periphery of the head portion 51, Gas sensor 3
Introduce to 5. By providing the plurality of small holes 53 on the outer periphery of the head portion 51, the tip of the head portion 51 can be sharpened, and it becomes difficult for dust to enter the small holes 53. Further, by arranging the plurality of small holes 53 at intervals, it is possible to capture not only the tip of the head portion 51 but also the atmosphere from around the middle.

Then, the worker repeats the piercing operation of the head section 51 and can compare the output of the gas sensor 35 to estimate the location of the victim.

Next, as a sixth embodiment, the configuration of a portable detection device is shown in FIG. This detection device 6
0 is a suction fan 61, a CO2 gas sensor 62, NH3
It comprises a gas sensor (ammonia gas sensor) 63 and a power supply device 64.

The suction side 6 piped to the suction fan 61
5 from the exhaust side 66 to the NH3 gas sensor 63 via the thin tube 67 and from the NH3 gas sensor 63 to the CO2 gas sensor 6 via the thin tube 68 in sequence.
2, the atmosphere sucked by the fan 61 from the CO2 gas sensor 62 to the suction side 65 via the thin tube 69 is circulated.

The outputs of the gas sensors 62 and 63 are detected by control units 70 and 71, and the numbers of the detected values are displayed on digital display units 72 and 73, respectively, and a plurality of LEDs are displayed on bar display units 74 and 75. Is displayed as a bar. The outputs of the gas sensors 62 and 63 can be immediately and visually grasped by the bar display units 74 and 75, and specific numerical values can be confirmed by the digital display units 72 and 73.

The power supply device 64 has a battery 76. When the power switch 77 is turned on, power supply to each of the control units 70 and 71 is started, and at the same time, a power lamp 78 is turned on to confirm the activation. it can. The power supply of the suction fan 61 is started when a start switch 79 different from the power switch 77 is turned on. That is, it is preferable to start the suction fan 61 after the power consumption is severe and the preparation for starting the measurement is completed. On the other hand, each of the control units 70 and 71 requires a rise time from the start of power supply to the start of measurement in order to stabilize the output in advance. And waste.

A timer 81 for monitoring the activation of the suction fan 61 is provided to limit the operation time of the suction fan 61 to a predetermined time. This predetermined time is, for example, 1
Estimate the time required for measurement, such as minutes,
By automatically shutting down, useless power consumption can be suppressed and the working time of the worker can be standardized. That is, even if the worker does not measure the time, the timer device 8
It is only necessary to monitor the output of each gas sensor 62, 63 during the driving of the first sensor. A drive indicator 80 is provided so that the drive can be confirmed.

Such a suction fan 6 for a predetermined time is used.
The automatic stop of 1 is useful other than this embodiment as long as it is a portable sampling type gas sensor device using a battery.

In each of the above embodiments, a photoacoustic sensor is used as a CO2 gas sensor for detecting a person. Alternatively, an infrared absorbing sensor or the like may be used. Different types of sensors such as an NH3 gas sensor and an odor sensor may be added or selected and used. In each embodiment, a storage device such as a logger or an IC card that stores the output of the gas sensor over time, a display that displays the stored value, a printer that prints, or the like may be used.

As described above, according to the first invention, in the detection device provided with the gas sensor connected to the closed space having the vent and confirming the presence or absence of the living body based on the output of the gas sensor, A cover that covers the vent,
A sponge-shaped contact surface portion that is in contact with the entire surface of the flat portion where the vent is provided at the opening of the cover portion. Can be introduced.

According to a second aspect of the present invention, there is provided a detecting device for detecting presence or absence of a living body based on an output of the gas sensor, wherein the gas sensor is connected to a closed space having a vent. Since there is provided a cover part to cover, and a contact surface part by a magnet chain that comes into contact with a metal plate provided with the ventilation port at the opening of the cover part,
The contact surface portion is brought into close contact with the ventilation port, whereby the atmosphere in the closed space can be reliably introduced into the gas sensor.

Further, in a third aspect of the present invention, in the detecting device for detecting presence or absence of a living body, the detection device includes a gas sensor connected to the sampling pipe and a fan for sucking an atmosphere through the sampling pipe. By being formed in a flexible probe that is inserted into the gap, by inserting the probe, it is possible to detect a part of the organism that cannot normally be confirmed. Furthermore, if a fiberscope is provided in the probe,
It can be confirmed by an image, and if a control wire is provided at the tip of the probe, the destination of the tip of the probe can be controlled. The tip of the probe is shaped like a pile, so that an operator can push the tip of the probe.

Still further, in the fourth invention, a gas sensor connected to the closed space and a fan device for introducing the atmosphere of the closed space to the gas sensor are provided, and the living body is detected based on an output of the gas sensor. In the detection device for checking the presence or absence of the above, the fan device is driven by a built-in power supply of the detection device and is provided with an automatic stop means for stopping the fan device at a predetermined time from the time of starting, so that unnecessary power consumption is not performed.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a first embodiment.

FIG. 2 is a perspective view showing a vent of FIG. 1;

FIG. 3 is a configuration diagram showing a main part of FIG. 1;

FIG. 4 is a configuration diagram showing a main part of the second embodiment.

FIG. 5 is a schematic configuration diagram showing a third embodiment.

FIG. 6 is a sectional view of the probe of FIG. 5;

FIG. 7 is a schematic configuration diagram showing a fourth embodiment.

FIG. 8 is a schematic configuration diagram showing a fifth embodiment.

FIG. 9 is a block diagram showing a sixth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 2 Vent 3 Cover part 4 Contact surface part 5, 36, 61 Suction fan 6, 35, 62, 63 Gas sensor 31 Sampling tube 32 Probe 51 Head part

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G01N 29/00 501 G01N 29/00 501 // G01N 21/59 21/59 Z

Claims (10)

[Claims] 1. A detection device comprising: a gas sensor connected to a closed space having a vent, wherein the detection device checks presence / absence of a living body based on an output of the gas sensor. A sponge-shaped contact surface portion that is in contact with the entire surface of the flat portion provided with the ventilation hole at the opening of the cover portion. A detection device, which is introduced into the gas sensor via a cover. 2. A detection device comprising: a gas sensor connected to a closed space having a vent, wherein the detection device checks presence or absence of a living body based on an output of the gas sensor. A contact portion formed by a magnet chain that abuts on a metal plate provided with the ventilation hole at an opening of the cover portion. A detection device, which is introduced into the gas sensor via a gas sensor. 3. The detecting device according to claim 1, wherein the closed space is a container. 4. A detection device comprising: a gas sensor connected to a sampling tube; and a fan for sucking an atmosphere through the sampling tube, wherein the detection device checks presence or absence of a living body. A detection device formed in a flexible probe, wherein an atmosphere at a tip portion of the probe is sucked by the fan and introduced into the gas sensor. 5. The detection device according to claim 4, wherein a fiberscope is provided in the probe. 6. The detecting device according to claim 4, wherein a control wire is provided at a tip of the probe. 7. The detection device according to claim 4, wherein the tip of the probe is shaped like a pile. 8. The detecting device according to claim 7, wherein an opening to the sampling tube is formed on the outer peripheral surface of the pile-shaped tip portion. 9. The detecting device according to claim 7, wherein an opening to the sampling tube is formed at predetermined intervals of the pile-shaped tip. 10. A gas sensor connected to the enclosed space,
A fan device for introducing the atmosphere of the closed space into the gas sensor, wherein the fan device checks presence or absence of a living body based on an output of the gas sensor. A detection device, comprising: an automatic stop unit that is driven and stops at a predetermined time from the start.