JP6944325B2 - sensor - Google Patents

Description

The present invention relates to a sensor.

Conventionally, a scattered light type fire detector that determines a fire by detecting the concentration of smoke that has flowed into this detection space is known as having a detection space provided in a light-shielding area that is shielded from the outside. (See, for example, Patent Document 1). This scattered light type fire detector includes a light emitting unit that emits detection light and a light receiving unit that receives light based on the detection light emitted from the light emitting unit, and the detection light emitted from the light emitting unit is detected. The light receiving part receives the scattered light generated by being scattered by the smoke particles in the space, compares the amount of light received by the light receiving part with the judgment threshold, and judges the fire based on the comparison result. rice field.

However, in the scattered light type fire detector of Patent Document 1, the amount of scattered light may change due to the difference in the particle size of the smoke flowing into the detection space, and the sensitivity for determining a fire may change. ..

Therefore, a dimming type separation type sensing device including a light emitting device that emits detection light and a light receiving device that is provided at a position away from the light emitting device and receives detection light from the light emitting device. A vessel was proposed. This dimming type separable sensor detects smoke based on the amount of decrease in the detected light received by the light receiving device to determine a fire.

Japanese Unexamined Patent Publication No. 2011-248547

By the way, the inventor of the present application uses the above-mentioned technique of the dimming type separation type detector to obtain a general shape such as the shape of the scattered light type fire detector of Patent Document 1 (for example, a disk shape having a diameter of about 100 mm). Etc.) came up with the idea of manufacturing a dimming sensor. That is, it is reduced by providing a light emitting means having a configuration corresponding to the light emitting device and a light receiving means having a configuration corresponding to the light receiving device in a housing having a general shape such as a disk shape having a diameter of about 100 mm, for example. I came up with the idea of manufacturing an optical sensor.

However, in the dimming sensor manufactured in this way, the detection light received by the light receiving means is reduced contrary to the original intention due to the fact that dust enters the inside of the housing and becomes dirty. However, in this case, the sensitivity of the fire judgment is increased, and there is a possibility that a false alarm is made to notify the fire even though the fire has not actually occurred.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a sensor capable of reducing the frequency of false alarms. Another object of the present invention is to provide a sensor that can be continuously used for a relatively long period of time and has a long life by reducing the frequency of maintenance.

In order to solve the above-mentioned problems and achieve the object, the sensor according to claim 1 is a sensor, and the first detection space into which the detection target in the monitoring area flows and the detection target flow into the first detection space. An abnormality in the monitoring area is detected based on the second detection space, which is the second detection space and is different from the first detection space, and the detection target that flows into the first detection space or the second detection space. A monitoring area abnormality determining means for determining is provided, and the monitoring area abnormality determining means determines an abnormality in the monitoring area based on the detection target flowing into the first detection space, or enters the second detection space. It is possible to switch whether to determine an abnormality in the monitoring area based on the inflowing detection target, and the monitoring area abnormality determination means is the first detection space before the detector reaches a predetermined case. The abnormality of the monitoring area is determined based on the detection target flowing into the monitoring area, and after the detector reaches the predetermined case, the monitoring area of the monitoring area is determined based on the detection target flowing into the second detection space. The detector determines an abnormality, and the detector emits light so as to output at least the first detection light passing through the first detection space and at least the second detection light passing through the second detection space. The first detection light that has passed through the first detection space, the second detection light that has passed through the second detection space, the light receiving means that receives the light, the first detection light that the light receiving means has received, and the first detection light. The sensor abnormality determining means for determining the abnormality on the first detection space side of the sensor based on the second detection light is provided, and the monitoring area abnormality determining means is said to be the sensor abnormality. Before the determination means determines the abnormality of the sensor on the first detection space side, the detection target flowing into the first detection space is assumed to be before the sensor reaches a predetermined case. When the abnormality in the monitoring area is determined based on the above, and the sensor abnormality determining means determines the abnormality on the first detection space side of the sensor, the sensor reaches the predetermined case. As a result, an abnormality in the monitoring area is determined based on the detection target flowing into the second detection space.

Further, the detector according to claim 2 is a first detection space into which a detection target in a monitoring area flows in and a second detection space into which the detection target flows, and the first detection space is different from the first detection space. The monitoring area abnormality determination means is provided with two detection spaces and a monitoring area abnormality determination means for determining an abnormality in the monitoring area based on the detection target flowing into the first detection space or the second detection space. Determines whether to determine the abnormality of the monitoring area based on the detection target flowing into the first detection space or to determine the abnormality of the monitoring area based on the detection target flowing into the second detection space. The switching is possible, and the monitoring area abnormality determining means determines an abnormality in the monitoring area based on the detection target flowing into the first detection space, or the detection target flowing into the second detection space. A display means for displaying whether or not an abnormality in the monitoring area is determined based on the above is provided.

Further, the sensor according to claim 3 is the sensor according to claim 2, wherein the monitoring area abnormality determining means flows into the first detection space before the sensor reaches a predetermined case. The abnormality in the monitoring area is determined based on the detection target, and after the sensor reaches the predetermined case, the abnormality in the monitoring area is determined based on the detection target flowing into the second detection space. do.

Further, the sensor according to claim 4 is the sensor according to claim 3 , wherein at least the first detection light passing through the first detection space and at least the second detection light passing through the second detection space. A light emitting means that emits light so as to output, a light receiving means that receives the first detection light that has passed through the first detection space, and the second detection light that has passed through the second detection space. The sensor abnormality determining means for determining the abnormality on the first detection space side of the sensor based on the first detection light and the second detection light received by the light receiving means is provided. The monitoring area abnormality determining means is assumed to be before the sensor abnormality determining means determines the abnormality on the first detection space side of the sensor before the sensor reaches a predetermined case. When an abnormality in the monitoring area is determined based on the detection target flowing into the first detection space, and the sensor abnormality determining means determines the abnormality on the first detection space side of the sensor. Assuming that the sensor has reached the predetermined case, the abnormality in the monitoring area is determined based on the detection target flowing into the second detection space.

Further, the sensor according to claim 5 is the sensor according to any one of claims 1 to 4, wherein one of the first detection space and the second detection space is directed to the outside. The monitoring area abnormality determination means includes the opening / closing means for opening the first detection space or the other space in the second detection space to the outside, and the monitoring area abnormality determination means is the detection target of the other space. The abnormality of the monitoring area is determined based on the above.

According to the sensor according to claim 1, the abnormality of the monitoring area is determined based on the detection target flowing into the first detection space, or the abnormality of the monitoring area is determined based on the detection target flowing into the second detection space. Since it is possible to switch whether to make a judgment, for example, even if one detection space side becomes abnormal, it is possible to judge an abnormality in the monitoring area on the other detection space side, so that it is normal. It is possible to determine an abnormality in the monitoring area on the detection space side, and it is possible to reduce the frequency of false reports that notify the abnormality even though no abnormality has actually occurred in the monitoring area. Further, for example, even if one detection space side becomes abnormal, it is possible to determine an abnormality in the monitoring area on the other detection space side without performing maintenance, so that the maintenance frequency can be reduced. , It becomes possible to provide a sensor that can be used continuously for a relatively long period of time and has a long life.
Further, before the sensor reaches the predetermined case, the abnormality in the monitoring area is determined based on the detection target flowing into the first detection space, and after the sensor reaches the predetermined case, the second detection space is set. By determining the abnormality in the monitoring area based on the inflowing detection target, for example, the first detection space side and the second detection space side can be sequentially used, so that the normal detection space side and the abnormal detection space side can be used in sequence. It is possible to prevent the sides from being mixed and used, and it is possible to surely reduce the frequency of false reports.
Further, before determining the abnormality on the first detection space side, the abnormality in the monitoring area was determined based on the detection target flowing into the first detection space, and the abnormality on the first detection space side was determined. In this case, by determining the abnormality of the monitoring area based on the detection target flowing into the second detection space, for example, it is possible to prevent the abnormality of the monitoring area from being determined on the detection space side which is certain to be abnormal. Therefore, it is possible to reduce the frequency of false alarms more reliably.

According to the sensor according to claim 2, the abnormality in the monitoring area is determined based on the detection target flowing into the first detection space, or the abnormality in the monitoring area is determined based on the detection target flowing into the second detection space. Since it is possible to switch whether to make a judgment, for example, even if one detection space side becomes abnormal, it is possible to judge an abnormality in the monitoring area on the other detection space side, so that it is normal. It is possible to determine an abnormality in the monitoring area on the detection space side, and it is possible to reduce the frequency of false reports that notify the abnormality even though no abnormality has actually occurred in the monitoring area. Further, for example, even if one detection space side becomes abnormal, it is possible to determine an abnormality in the monitoring area on the other detection space side without performing maintenance, so that the maintenance frequency can be reduced. , It becomes possible to provide a sensor that can be used continuously for a relatively long period of time and has a long life.
Further, for example, by displaying whether to determine the abnormality in the monitoring area based on the detection target flowing into the first detection space or to determine the abnormality in the monitoring area based on the detection target flowing into the second detection space, for example. Since the state of the sensor can be notified to the administrator, maintenance such as cleaning of the sensor can be performed at an appropriate timing.

According to the sensor according to the third aspect, before the sensor reaches a predetermined case, an abnormality in the monitoring area is determined based on the detection target flowing into the first detection space, and the sensor is in the predetermined case. After that, by determining the abnormality in the monitoring area based on the detection target flowing into the second detection space, for example, the first detection space side and the second detection space side can be sequentially used, so that it is normal. It is possible to prevent the use of both the normal detection space side and the abnormal detection space side in a mixed manner, and it is possible to surely reduce the occurrence frequency of false reports.

According to the sensor according to claim 4, before determining the abnormality on the first detection space side, the abnormality in the monitoring area is determined based on the detection target flowing into the first detection space, and the first When the abnormality on the detection space side is determined, the abnormality in the monitoring area is determined based on the detection target flowing into the second detection space, for example, the monitoring area on the detection space side where it is certain that the abnormality is abnormal. Since it is possible to prevent the determination of the abnormality of the above, it is possible to more reliably reduce the frequency of occurrence of false reports.

According to the sensor according to claim 5, one space in the first detection space or the second detection space is closed to the outside, and the other space in the first detection space or the second detection space is closed. By opening the space to the outside, for example, it is possible to prevent dust and the like from entering one of the spaces that are not used for determining an abnormality in the monitoring area, so that the other space side is preserved in a normal state. This makes it possible to reduce the maintenance frequency of the sensor as a whole and reduce the maintenance cost of the sensor.

It is a side view of the sensor which concerns on this embodiment. It is a bottom view of a sensor. It is an enlarged cross-sectional view of the lower detection space and the upper detection space of the sensor. It is a block diagram of a sensor. FIG. 3 is an enlarged cross-sectional view of the lower detection space and the upper detection space of the sensor in a state where the shutter portion of FIG. 3 is moved. It is a flowchart of disaster prevention processing. It is a flowchart of a movement process.

Hereinafter, embodiments of the sensor according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

[Basic concept of the embodiment]
First, the basic concept of the embodiment will be described. Embodiments are generally related to a sensor.

Here, the "sensor" is a device for determining an abnormality in the monitoring area, specifically, a device for determining an abnormality by detecting a detection target in the monitoring area, for example, a smoke detector. , A fire detector, a gas detector, and the like. As an example, the concept includes a first detection space, a second detection space, and a monitoring area abnormality determination means. The "fire detector" is a detector that detects smoke and determines a fire, and is a concept including, for example, a scattered light type fire detector, a dimming type fire detector, and the like. Further, the "monitoring area" is an area to be monitored by a sensor, specifically, a space having a certain extent, an indoor space or an outdoor space, for example. It is a concept that includes spaces such as corridors, stairs, or rooms in buildings. Further, the "abnormality of the monitoring area" means that the monitoring area is in a state different from the normal state, and is a concept including, for example, a fire and a gas leak. Further, the “detection target” is a target to be detected by a sensor, and specifically, is related to an abnormality in a monitoring area, and is a concept including, for example, smoke, carbon monoxide gas, and the like.

The "first detection space" is a space in which the detection target in the monitoring area flows in, and is, for example, a space that is shielded from the outside of the sensor. Further, the "second detection space" is a space into which the detection target of the monitoring area flows in, specifically, a space different from the first detection space, for example, a space that does not overlap with the first detection space. It is a space that is shielded from the outside of the sensor.

Further, the "monitoring area abnormality determination means" is a means for determining an abnormality in the monitoring area based on the detection target flowing into the first detection space or the second detection space, and specifically, the first detection space. It is a means capable of switching between determining the abnormality in the monitoring area based on the detection target flowing into the second detection space and determining the abnormality in the monitoring area based on the detection target flowing into the second detection space. The timing at which the monitoring area abnormality determination means switches is arbitrary, but the concept includes, for example, the timing when the sensor reaches a predetermined case, the timing when the user performs a predetermined operation on the sensor, and the like. be.

Here, the "timing at which the sensor reaches a predetermined case" is the timing at which the sensor reaches a predetermined state or case, for example, the timing at which the abnormality of the sensor is determined, and the timing at which the sensor is started to be used. It is a concept including the timing when a predetermined period (for example, 5 to 6 years, etc.) has elapsed from the above, and the timing when a predetermined time (for example, 6:00 pm in a day) has come. The "timing for determining the abnormality of the sensor" is the timing for determining the abnormality of some components of the sensor. In addition, "abnormal" means that the state is not normal, specifically, an abnormal state in which the function of the sensor is adversely affected, a failure state in which the function of the sensor is impaired, or the like. It is a corresponding concept, for example, due to a failure, abnormality, stain, deterioration, etc. of a circuit, board, element, etc. that is a component of the sensor, it emits light normally or normally in order to exert the function of the sensor. It is a concept that includes a state in which light cannot be received. Further, the "function of the sensor" is a main function of the sensor, and is a concept including, for example, a function of determining an abnormality in a monitoring area. Further, the "timing at which the user performs a predetermined operation on the sensor" is a timing at which a predetermined operation is performed, for example, the timing at which the operation button of the sensor is pressed, and the components of the sensor. It is a concept that includes the timing of movement.

Then, in the embodiment shown below, the "sensor" is a "dimming fire detector", the "monitoring area" is a "building room", and the "abnormality of the monitoring area" is "fire". This will be described when the "detection target" is "smoke" and the "monitoring area abnormality determination means" switches to the "timing for determining the abnormality of the sensor". Further, the numerical values shown in the following embodiments are shown as an example for convenience of explanation, and in practice, numerical values other than the illustrated numerical values are used as long as the concept shown in the embodiments is followed. You may.

[Specific contents of the embodiment]
Next, the specific contents of the embodiment will be described.

(composition)
First, the configuration of the sensor according to the present embodiment will be described. FIG. 1 is a side view of the sensor according to the present embodiment, FIG. 2 is a bottom view of the sensor, and FIG. 3 is an enlarged cross-sectional view of the lower detection space and the upper detection space of the sensor. Yes, FIG. 4 is a block diagram of the sensor. For convenience of explanation, in FIG. 1, the outside of the sensor 100 is shown by a broken line and the inside is shown by a solid line, and in FIG. 3, the detector in the state seen from the AA arrow in FIG. It is a cross-sectional view of a part of 100, hatching is omitted as appropriate, and the optical arrangement is shown for the internal components of the lower detection space 13 and the upper detection space 14, and the physical arrangement (electrical) is shown. (Including basic wiring) is optional, and the layout is shown for convenience unless otherwise specified. Further, in the following description, the XYZ directions shown in FIGS. 1 to 3 are orthogonal to each other. Specifically, the Z direction is the vertical direction, and the X and Y directions are the vertical directions. As the horizontal direction orthogonal to the above, for example, the Z direction is referred to as the height direction, the + Z direction is referred to as the upper side (plane), and the −Z direction is referred to as the lower side (bottom surface). Further, the following terms related to the "XYZ directions" are convenient expressions for explaining the relative positional relationship (or direction) of each component in the illustrated sensor 100. With reference to the central position of the lower detection space 13 in FIG. 3, the direction away from the lower detection space 13 is referred to as "outside", and the direction approaching the lower detection space 13 is referred to as "inside". explain.

The detector 100 shown in each of these figures is a dimming fire detector, which is a device for determining a fire by detecting smoke that is a detection target in a monitoring area. As shown, it is used by being attached to the installation surface 900 which is the ceiling surface of the monitoring area. For example, the attachment base 11, the housing 12, the lower detection space 13 in FIG. 3, the upper detection space 14, and the shutter portion 15. , The detection unit 21, the alarm unit 22, the recording unit 23, and the control unit 24 of FIG. 4 are provided.

(Configuration-Mounting base)
The mounting base 11 of FIG. 1 is a mounting means for mounting the housing 12 on the mounting surface 900. The specific type and configuration of the mounting base 11 are arbitrary, but are used, for example, between the housing 12 and the installation surface 900, and are known fixing means (for example, screws or fitting structures, etc.). ) Is fixed.

(Configuration-Housing)
The housing 12 of FIG. 1 is a housing means for accommodating various components of the sensor 100. The specific type and configuration of the housing 12 are arbitrary, but for example, a cylindrical portion provided on the upper side (+ Z direction) in the height direction (Z direction) and a lower side (+ Z direction) from the cylindrical portion. It is formed by a dome-shaped portion formed so as to project in the −Z direction), and is provided with the opening 121 in FIG.

(Structure-Housing-Opening)
The opening 121 in FIG. 2 is an inflow means for allowing gas to flow into the housing 12, and an outflow means for allowing gas to flow out to the housing 12. The specific type and configuration of the opening 121 is arbitrary, but for example, a plurality of openings 121 are provided in the dome-shaped portion of the housing 12.

(Configuration-Lower detection space)
The lower detection space 13 in FIG. 3 is a first detection space or a second detection space, and is a space into which smoke, which is a detection target of the monitoring area, flows in. The specific type and configuration of the lower detection space 13 is arbitrary, but for example, the lower detection space 13 is provided adjacent to the lower side (−Z direction) of the upper detection space 14, and the partition portion 131. , The lower labyrinth 132, the lower insect net 133, and the cover 134, and also the lower light emitting part 161, the lower spectroscopic part 162, the lower reflecting part 171 and the lower light receiving part. It houses 172.

(Configuration-Lower detection space-Partition)
The partition portion 131 is an isolation means that separates the lower detection space 13 and the upper detection space 14 from each other. For example, a part of the lower detection space 162 to be described later is provided via the partition portion 131. It is formed as a translucent portion 131a (for example, a transparent portion) so that light can pass from the lower detection space 13 side to the upper detection space 14 side, and other than a part where the lower spectroscopic portion 162 is provided. The other part is formed as a light-shielding portion 131b (for example, a black portion) so as to block light between the lower detection space 13 and the upper detection space 14.

(Configuration-Lower detection space-Lower labyrinth)
The lower labyrinth 132 is a light-shielding inflow / outflow means that allows gas to flow in or out while blocking light from the outside of the sensor 100. Specifically, the lower labyrinth 132 surrounds the lower detection space 13 from the side surface side. For example, it is possible to apply the conventional configuration, and the conventional configuration is arranged in a circular shape.

(Configuration-Lower detection space-Lower insect net)
The lower insect repellent net 133 is an insect repellent means for suppressing insects from entering the lower detection space 13. The specific type and configuration of the lower insect repellent net 133 are arbitrary, but for example, gas flows in between the outside and the inside of the lower detection space 13 through the small holes of the lower insect repellent net 133 itself. Alternatively, it is configured to allow insects to flow out while preventing insects from entering the lower detection space 13. Further, the lower insect repellent net 133 surrounds the lower labyrinth 132 from the side surface side, and is arranged in a circular shape on the outside of the lower labyrinth 132, for example.

(Configuration-Lower detection space-Cover)
The cover portion 134 is a light-shielding means that blocks light from the outside of the sensor 100. Specifically, the cover portion 134 surrounds the lower detection space 13 from the lower side (−Z direction), and is, for example, a conventional configuration. Is applicable.

(Configuration-Lower detection space-Lower light emitting part)
The lower light emitting unit 161 is a light emitting means that emits light so that the lower detection light and the upper detection light are output. The specific type and configuration of the lower light emitting unit 161 are arbitrary, but for example, light of a constant intensity is output toward the lower spectroscopic unit 162, and as an example, a light emitting diode or the like is used. Can be configured. The lower detection light or the upper detection light corresponds to the "first detection light" or the "second detection light". Further, the lower detection light will be collectively referred to as “detection light” as appropriate for the upper detection light.

(Structure-Lower detection space-Lower spectroscopic section)
The lower spectroscopic unit 162 is a spectroscopic means that disperses the light emitted by the lower light emitting unit 161 and outputs the lower detection light and the upper detection light. The specific type and configuration of the lower spectroscopic unit 162 are arbitrary, but for example, the lower spectroscopic unit 162 is provided in the translucent portion 131a of the partition portion 131, and the lower detection light is directed to the lower detection space 13 side. It outputs and outputs the upper detection light to the upper detection space 14 side via the light transmitting portion 131a of the partition portion 131, and is configured as a beam splitter that divides the luminous flux into a plurality of parts at an arbitrary ratio. However, here, as an example, it is assumed that the light flux is configured as a half mirror that splits the light flux into two at a ratio of 1: 1.

(Structure-Lower detection space-Lower reflector)
The lower reflecting unit 171 is a detecting side reflecting means that reflects the detected light to the lower light receiving unit 172. The specific type and configuration of the lower reflecting portion 171 is arbitrary, but for example, three are provided, and reflection is performed with a relatively high reflectance (for example, 90% to 95% or more). It can be configured by using a reflective mirror or the like.

(Configuration-Lower detection space-Lower light receiving part)
The lower light receiving unit 172 is a light receiving means that receives the lower detection light that has passed through the lower detection space 13. The specific type and configuration of the lower light receiving unit 172 is arbitrary, but for example, it receives the lower detection light output by the lower spectroscopic unit 162, and may be configured by using a photodiode or the like. can.

(Configuration-Upper detection space)
The upper detection space 14 is a first detection space or a second detection space, and is a space into which smoke, which is a detection target of the monitoring area, flows in. The specific type and configuration of the upper detection space 14 is arbitrary, but for example, it is provided adjacent to the upper side (+ Z direction) of the lower detection space 13, and the base portion 141 and the upper side. It is surrounded by a labyrinth 142, an upper insect screen 143, and a partition 131, and also houses an upper reflecting portion 181 and an upper light receiving portion 182.

(Configuration-Upper detection space-Base)
The base portion 141 is a light-shielding means that blocks light from the outside of the sensor 100. Specifically, the base portion 141 surrounds the upper detection space 14 from the upper side (+ Z direction), and for example, a conventional configuration is applied. Is possible.

(Configuration-Upper detection space-Upper labyrinth)
The upper labyrinth 142 is a light-shielding inflow / outflow means similar to the lower insect repellent net 133, and specifically surrounds the upper detection space 14 from the side surface side. For example, a conventional configuration can be applied. Some are arranged in a circle.

(Structure-Upper detection space-Upper insect net)
The upper insect repellent net 143 is the same insect repellent means as the lower insect repellent net 133. The specific type and configuration of the upper insect repellent net 143 are arbitrary, but for example, gas flows in or out between the outside and the inside of the upper detection space 14 through the small holes of the upper insect repellent net 143 itself. It is configured to prevent insects from entering the upper detection space 14 while allowing the above. Further, the upper insect repellent net 143 surrounds the upper labyrinth 142 from the side surface side, and is arranged in a circular shape on the outside of the upper labyrinth 142, for example.

(Structure-Upper detection space-Upper reflector)
The upper reflecting unit 181 is an upper reflecting means that reflects the upper detection light to the upper light receiving unit 182. The specific type and configuration of the upper reflecting portion 181 are arbitrary, but for example, it is assumed that the upper reflecting portion 181 is configured in the same manner as the lower reflecting portion 171.

(Structure-Upper detection space-Upper light receiving part)
The upper light receiving unit 182 is a light receiving means that receives the upper detection light that has passed through the upper detection space 14. The specific type and configuration of the upper light receiving unit 182 is arbitrary, but it is assumed that the upper light receiving unit 182 is configured in the same manner as the lower light receiving unit 172, for example. Then, as described above, the upper reflection unit 181 and the upper light receiving unit 182 and the lower reflection unit 171 and the lower light receiving unit 172 are configured in the same manner as each other. Therefore, for example, the lower detection space 13 and the upper detection When smoke does not flow into the space 14 and the sensor 100 is normal, the intensity of the lower detection light received by the lower light receiving unit 172 and the intensity of the upper detection light received by the upper light receiving unit 182 are different. It will be about the same as each other.

(Configuration-Shutter section)
The shutter unit 15 closes one space in the lower detection space 13 or the upper detection space 14 to the outside, and closes the other space in the lower detection space 13 or the upper detection space 14 to the outside. It is an opening and closing means to open. FIG. 5 is an enlarged cross-sectional view of the lower detection space and the upper detection space of the sensor in a state where the shutter portion of FIG. 3 is moved. The specific type and configuration of the shutter portion 15 shown in FIGS. 3 and 5 are arbitrary, but for example, the lower insect repellent net 133 or the upper insect repellent net 143 is surrounded from the side surface side, and from each insect repellent net. Also has a large-diameter cylindrical shape, is movable in the vertical direction (Z-axis direction) by a predetermined moving mechanism (not shown), and is capable of blocking smoke and light. It is made of a material (for example, a black resin material, etc.).

As a predetermined moving mechanism for moving the shutter portion 15 in the vertical direction, for example, a moving mechanism configured by using a known motor, a known rack and pinion mechanism, a known moving guide rail, or the like. Alternatively, any moving mechanism including other known moving mechanisms can be applied, and detailed description thereof will be omitted. Then, as shown in FIG. 3, when the shutter portion 15 is moved to the upper position facing the upper insect repellent net 143, the upper detection space 14 is closed to the outside and the lower detection space 13 is closed. It is configured to be open to the outside. In this case, when air enters the inside of the housing 12 through the opening 121 of FIG. 2, the air is blocked by the shutter portion 15 and does not flow into the upper detection space 14, and the lower insect repellent is prevented. It will flow into the lower detection space 13 via the net 133 and the lower labyrinth 132. Further, as shown in FIG. 5, when the shutter portion 15 is moved to a lower position facing the lower insect repellent net 133, the lower detection space 13 is closed to the outside and the upper detection space 13 is closed. 14 is configured to be open to the outside. In this case, when air enters the inside of the housing 12 through the opening 121 of FIG. 2, the air is blocked by the shutter portion 15 and does not flow into the lower detection space 13, and the upper insect repellent is prevented. It will flow into the upper detection space 14 via the net 143 and the upper labyrinth 142.

(Configuration-Detector)
The detection unit 21 of FIG. 4 is a detection means for detecting smoke that has flowed into the lower detection space 13 or the upper detection space 14. The specific type and configuration of the detection unit 21 are arbitrary, but include, for example, the lower light emitting unit 161 of FIG. 3, the lower light receiving unit 172, and the upper light receiving unit 182.

(Configuration-alarm unit)
The alarm unit 22 of FIG. 4 is an alarm means that outputs an alarm when the sensor 100 determines a fire. The specific type and configuration of the alarm unit 22 is arbitrary, but includes, for example, a speaker (not shown) that outputs an alarm by voice, an indicator lamp 221 of FIG. 2 that outputs an alarm by light emission display, and the like. It is a thing.

(Configuration-Recording unit)
The recording unit 23 of FIG. 4 is a recording means for recording a program and various data necessary for the operation of the sensor 100, and is configured by using, for example, an EEPROM, a Flash memory, or the like. However, instead of EEPROM or Flash memory, or together with EEPROM or Flash memory, an external recording device such as a hard disk, a magnetic recording medium such as a magnetic disk, an optical recording medium such as a DVD or Blu-ray disk, or a ROM, USB memory, SD. Any other recording medium, including an electrical recording medium such as a card, can be used.

(Configuration-Control unit)
The control unit 24 of FIG. 4 is a control means for controlling the sensor 100. Specifically, the CPU, various programs interpreted and executed on the CPU (basic control programs such as an OS, and startup on the OS). It is a computer configured to include an application program that realizes a specific function) and an internal memory such as a RAM for storing the program and various data. In particular, the control program according to the embodiment is installed in the sensor 100 via an arbitrary recording medium or network to substantially configure each part of the control unit 24.

The control unit 24 is functionally conceptually provided with a monitoring area abnormality determination unit 241 and a sensor abnormality determination unit 242. The monitoring area abnormality determination unit 241 is a monitoring area abnormality determination means for determining a fire that is an abnormality in the monitoring area based on the smoke to be detected flowing into the lower detection space 13 or the upper detection space 14, for example. A monitoring area abnormality that can switch between determining a fire in the monitoring area based on the smoke flowing into the lower detection space 13 and determining a fire in the monitoring area based on the smoke flowing into the upper detection space 14. It is a judgment means. The sensor abnormality determination unit 242 detects the lower detection space 13 side or the upper side of the sensor 100 based on the lower detection light received by the lower light receiving unit 172 and the upper detection light received by the upper light receiving unit 182. This is a sensor abnormality determining means for determining abnormalities on the space 14 side. The processing performed by each unit of the control unit 24 will be described later.

(process)
Next, the disaster prevention processing and the movement processing executed by the sensor 100 of FIG. 4 configured in this way will be described.

(Treatment-Disaster prevention treatment)
FIG. 6 is a flowchart of disaster prevention processing (steps are abbreviated as “S” in the following description of each processing). "Disaster prevention treatment" is a treatment for disaster prevention, and specifically, a treatment for determining a fire. The timing of executing this disaster prevention treatment is arbitrary, but for example, it will be described from the place where the disaster prevention treatment is started, assuming that the sensor 100 is installed and the power is turned on and then repeatedly started and executed. When the power of the sensor 100 is turned on, the control unit 24 supplies a voltage to the lower light emitting unit 161 of FIG. 3 and repeats the voltage at regular time intervals (for example, 3 seconds to 5 seconds) on the lower side. It will be described as assuming that the light emitting unit 161 emits light at a constant intensity (the movement process described later is also assumed to be the same). Further, the position of the first shutter portion 15 at the time of construction of the sensor 100 may be either the upper position in FIG. 3 or the lower position in FIG. 5, but the position of the first shutter portion 15 is shown in FIG. It will be described as being in the upper position (the same assumption is made for the movement process described later).

First, in SA1 of FIG. 6, the monitoring area abnormality determination unit 241 selects the target detection space. Here, the "target detection space" is a space used for determining a fire in the monitoring area, and is, for example, a space of either the lower detection space 13 or the upper detection space 14. The SA1 is specifically arbitrary, but for example, it is determined whether the shutter portion 15 is provided in the upper position or the lower position, and the shutter portion 15 is provided in the upper position as shown in FIG. If it is determined that the lower detection space 13 is selected as the target detection space, on the other hand, if it is determined that the shutter portion 15 is provided at the lower position as shown in FIG. 5, the upper detection space 13 is detected. Space 14 is selected as the target detection space. The method for determining the position of the shutter unit 15 is arbitrary, and a known method can be applied. Here, for example, the sensor 100 is provided with a known position detection sensor, and this position is provided. The position of the shutter unit 15 is detected by the detection sensor and determined. Here, for example, since the position of the shutter unit 15 is the upper position in FIG. 3, the lower detection space 13 is selected as the target detection space.

In SA2 of FIG. 6, the monitoring area abnormality determination unit 241 determines whether or not a fire (abnormality) has occurred in the monitoring area. Specifically, although it is arbitrary, for example, the light from the lower light emitting unit 161 in FIG. 3 is irradiated to the lower spectroscopic unit 162, and the irradiated light is dispersed by the lower spectroscopic unit 162. After being separated into the side detection light and the upper detection light, the dispersed lower detection light passes through the lower detection space 13 and is irradiated to the lower light receiving unit 172 via the lower reflection unit 171. After the dispersed upper detection light is irradiated to the upper detection space 14 side through the light transmitting portion 131a of the partition portion 131, the upper detection light passes through the upper detection space 14 and is passed through the upper reflection portion 181 to the upper side. The light receiving unit 182 is irradiated, but the process is as follows.

Specifically, applying a fire determination technique using a known dimming fire detector, for example, a threshold intensity, which is the intensity of the detected light as a threshold for determining a fire, is recorded in the recording unit 23. First, the light receiving unit provided in the target detection space selected by SA1 is specified, the intensity of the detection light actually received by the specified light receiving unit is acquired, and the intensity of the acquired detection light and the recording unit 23 are obtained. Is compared with the threshold intensity of, and the judgment is made based on the comparison result. Then, when the intensity of the acquired detection light is equal to or higher than the threshold intensity, it is determined that no fire has occurred (NO of SA2), and the process shifts to SA1. If the intensity of the acquired detection light is less than the threshold intensity, it is determined that a fire has occurred (YES in SA2), and the process shifts to SA3.

Here, for example, since the lower detection space 13 is selected as the target detection space in SA1, the determination is made based on the intensity of the first detection light received by the lower light receiving unit 172, but a fire occurs. If not, the first detected light from the lower spectroscopic unit 162 is received by the lower light receiving unit 172 with almost no dimming, so that the intensity of the first detected light becomes equal to or higher than the threshold intensity. , The monitoring area abnormality determination unit 241 determines that no fire has occurred. On the other hand, for example, when a fire occurs, the smoke of the fire flows into the lower detection space 13 via the lower insect net 133 and the lower labyrinth 132 in FIG. 3, so that the first detection from the lower spectroscopic unit 162 Since the light is dimmed by the inflowing smoke and then received by the lower light receiving unit 172, the intensity of the lower detection light becomes less than the threshold intensity, and the monitoring area abnormality determination unit 241 fires. Is determined to have occurred.

In SA3 of FIG. 6, the control unit 24 gives an alarm. Specifically, although it is arbitrary, a fire occurrence is warned by using a known method, for example, through a speaker (not shown) of the alarm unit 22 in FIG. 4 or an indicator lamp 221 in FIG. Here, for example, an alarm message such as "a fire has been detected" is repeatedly output by voice from the speaker, and the indicator lamp 221 is lit in red for display output.

In SA4 of FIG. 6, the control unit 24 determines whether or not to recover. Specifically, although it is optional, for example, whether or not the recovery signal transmitted from the disaster prevention receiver is received via the communication means (not shown) of the sensor 100 by a predetermined operation on the disaster prevention receiver (not shown) by the user. Judgment is based on. Then, when the recovery signal is not received, it is determined that the recovery is not performed (NO of SA4), and SA4 is repeatedly executed until it is determined that the recovery signal is to be recovered. Further, when the recovery signal is received, it is determined that the recovery signal is to be recovered (YES of SA4), and the process proceeds to SA5. Here, for example, if the user does not perform a predetermined operation on the disaster prevention receiver (not shown), it is determined that the recovery is not performed, while the user performs the predetermined operation on the disaster prevention receiver (not shown). If so, it will be determined that it will be restored.

In SA5 of FIG. 6, the control unit 24 restores. Specifically, the process is terminated after the restoration is performed by stopping the alarm issued in SA3. This completes the disaster prevention process.

(Processing-Move processing)
FIG. 7 is a flowchart of the movement process. The “movement process” is a process of moving the shutter unit 15, and is, for example, a process of moving the shutter unit 15 when it is determined that the shutter unit 15 is abnormal in the detection space of the sensor. The timing of executing this movement process is arbitrary, but for example, it will be described from the point where the movement process is started, assuming that the sensor 100 is started and executed after the sensor 100 is installed or maintained and the power is turned on. Here, for example, as shown in FIG. 3, the lower detection space 13 is opened by the shutter unit 15 and communicates with the outside of the sensor 100, so that the lower detection space 13 is inside the lower detection space 13 due to long-term use. Dust may accumulate and gradually stain the lower reflective portion 171 (for example, every few months). However, when the lower reflective portion 171 is soiled in this way, the detection on the lower detection space 13 side is performed. A case where the function of the device 100 is adversely affected or the function of the sensor 100 in the lower detection space 13 is impaired is determined as "abnormality of the sensor 100" will be described. Further, for example, after moving the shutter unit 15 from the upper position to the lower position, for example, as shown in FIG. 5, the upper detection space 14 is opened by the shutter unit 15 and is outside the sensor 100. Dust may accumulate inside the upper detection space 14 due to long-term use, and the upper reflection portion 181 may be gradually soiled (for example, every few months). In this way, the upper reflection portion 181 may be soiled. The state in which the function of the sensor 100 in the upper detection space 14 is adversely affected or the function of the sensor 100 in the upper detection space 14 is impaired due to the contamination of the upper detection space 14 is also a state in which the function of the sensor 100 is impaired. A case of determining "normal" will be described.

First, in SB1 of FIG. 7, the sensor abnormality determination unit 242 selects the target detection space. Specifically, it is arbitrary, but for example, it is selected by performing the same processing as SA1 in FIG. Here, for example, since the position of the shutter unit 15 is the upper position in FIG. 3, the lower detection space 13 is selected as the target detection space.

In SB2 of FIG. 7, the sensor abnormality determination unit 242 determines whether or not the sensor 100 has become abnormal. Specifically, although it is optional, for example, as described in SA2 of FIG. 6, the lower detection light of FIG. 3 passes through the lower detection space 13 and passes through the lower reflection unit 171 to the lower light receiving unit 172. The upper detection light passes through the upper detection space 14 and is irradiated to the upper light receiving unit 182 via the upper reflection unit 181. The process is as follows.

Specifically, for example, as described above, when smoke does not flow into the lower detection space 13 and the upper detection space 14 and the sensor 100 is normal, the lower side receives light from the lower light receiving unit 172. The intensity of the detection light and the intensity of the upper detection light received by the upper light receiving unit 182 are about the same as each other, and when smoke flows into the lower detection space 13, the lower light receiving unit 172 receives the light. The intensity of the side detection light drops sharply (for example, every few seconds) with respect to the intensity of the upper detection light received by the upper light receiving unit 182, and the lower reflection unit 171 is gradually soiled by long-term use. The processing is performed by paying attention to the fact that the intensity of the lower detection light received by the lower light receiving unit 172 gradually decreases with respect to the intensity of the upper detection light received by the upper light receiving unit 182 (for example, every few months). .. More specifically, for example, it is assumed that the difference threshold intensity, which is the intensity of light as the difference threshold for determining the abnormality of the sensor 100, is recorded in the recording unit 23, and first, in the target detection space selected by SB1. The light receiving part provided is specified, the intensity of the detection light actually received by the specified light receiving part is acquired, and the light receiving part other than the light receiving part provided in the target detection space selected by SB1 is used. Acquires the intensity of the detection light actually received by the light receiving part of ) Is calculated, the calculated intensity difference value is compared with the difference threshold value of the recording unit 23, and a determination is made based on the comparison result. Then, when the calculated intensity difference value is smaller than the difference threshold value, it is determined that the sensor 100 is not abnormal (NO of SB2), and the processing of SB2 is repeated until it is determined that the sensor 100 is abnormal. Run. If the calculated intensity difference value is larger than the difference threshold value or both are the same, the intensity difference value is large due to fire smoke, or the intensity difference value is due to contamination of the sensor 100. In order to distinguish whether is increasing, the following judgment is made by paying attention to the rate of change of the intensity difference value. For example, it is assumed that the past intensity difference value of the latest several minutes to about an hour is stored in the recording unit 23, the change speed of the intensity difference value is calculated from the past intensity difference value, and the calculated change speed is calculated. When a predetermined fire change speed (for example, a change speed corresponding to the change speed of the detection light received by the lower light receiving unit 172 or the upper light receiving unit 182 at the time of a fire) is supported, the sensor 100 is contaminated. Rather than the cause, it is highly likely that the intensity difference value is large due to the smoke of the fire, and it is determined that the sensor 100 is not abnormal (NO of SB2), and it becomes abnormal. The SB2 process is repeatedly executed until it is determined that the fire has been generated. On the other hand, if the calculated change rate does not correspond to the predetermined change rate during a fire and is orders of magnitude slower than the predetermined change rate during a fire, the cause is not the smoke of the fire but the contamination of the sensor 100. Assuming that there is a high possibility that the intensity difference value is large, it is determined that the sensor 100 has become abnormal (YES in SB2), and the process proceeds to SB3.

Here, for example, when the lower reflection unit 171 is gradually soiled due to long-term use, the intensity difference value is calculated, and then the calculated intensity difference value is compared with the difference threshold of the recording unit 23. Since the intensity difference value is larger than the difference threshold, and the change rate calculated from the past intensity difference values of about several minutes to hours is an order of magnitude slower than the predetermined change rate at the time of fire, the detector. It is determined that 100 has become abnormal.

In SB3 of FIG. 7, the control unit 24 issues an alarm. Specifically, although it is arbitrary, the sensor 100 is abnormally performed by using a known method, for example, through a speaker (not shown) of the alarm unit 22 in FIG. 4 or an indicator lamp 221 in FIG. Warn that it has become. Here, for example, an alarm message such as "a functional failure in the first detection space of the sensor has been detected" is repeatedly output by voice on the speaker, and the indicator lamp 221 is blinked for display output. .. Regarding the audio output of the alarm message here, considering that the disaster prevention process can be performed without any problem by performing the SB4 process described later, and that the repeated output may become troublesome. , May be omitted.

In SB4 of FIG. 7, the control unit 24 moves the shutter unit 15. Specifically, although it is arbitrary, for example, the target detection space selected in SB1 is specified, and a predetermined position is set at a position different from the above-mentioned upper position or lower position corresponding to the specified target detection space. The shutter unit 15 is moved using the moving mechanism. Here, for example, since the lower detection space 13 is selected as the target detection space in SB1, the shutter unit is moved to a lower position different from the upper position corresponding to the lower detection space 13 by using a predetermined moving mechanism. Move 15. In this case, the shutter unit 15 moves to the lower position as shown in FIG.

In SB5 of FIG. 7, the sensor abnormality determination unit 242 selects the target detection space. Specifically, it is arbitrary, but for example, it is selected by performing the same processing as SA1 in FIG. Here, for example, since the position of the shutter portion 15 is the lower position in FIG. 5, the upper detection space 14 is selected as the target detection space.

In SB6 of FIG. 7, the sensor abnormality determination unit 242 determines whether or not the sensor 100 has become abnormal again. Specifically, although it is arbitrary, for example, as described in SB2, the detection space is irradiated to each light receiving portion, and the processing is performed as follows.

Specifically, for example, since the lower detection space 13 in FIG. 5 is already contaminated, if the upper detection space 14 side is not yet contaminated, the intensity of the lower detection light received by the lower light receiving unit 172 and the upper side. Although the intensity of the upper detection light received by the light receiving unit 182 is relatively large, the upper reflection unit 181 is gradually soiled by long-term use, and the intensity of the upper detection light received by the upper light receiving unit 182 is lower. Gradually approaching the intensity of the lower detection light received by the light receiving unit 172 (for example, every few months), and when smoke flows into the upper detection space 14, the upper detection light received by the upper light receiving unit 182 The processing is performed by paying attention to the fact that the intensity of the light is rapidly approached (for example, in units of several seconds) with respect to the intensity of the lower detection light received by the lower light receiving unit 172. More specifically, for example, first, the light receiving portion provided in the target detection space selected in SB5 is specified, and then the intensity difference value is calculated in the same manner as in the case of SB2, and then the calculated intensity difference is calculated. Judgment is based on whether the value is almost zero. "Intensity difference value becomes almost zero" means that each intensity matches and the intensity difference value becomes zero, or each intensity value deviates within the error range and the intensity difference value becomes close to zero. It is a concept corresponding to that. Then, when the calculated intensity difference value is not almost zero, it is determined that the sensor 100 is not abnormal again (NO in SB6), and the sensor 100 is again used. SB6 is repeatedly executed until it is determined that the abnormality has occurred. Further, when the calculated intensity difference value is almost zero, as in the case of SB2, the intensity difference value is almost zero due to the smoke of the fire, or the sensor 100 is contaminated. In order to distinguish whether the intensity difference value is almost zero due to the cause, the following determination is made by paying attention to the change rate of the intensity difference value. For example, when the change speed of the strength difference value is calculated from the past strength difference value stored in the recording unit 23 and the calculated change speed corresponds to a predetermined change speed at the time of fire, the sensor 100 is contaminated. Rather than the cause, it is highly likely that the intensity difference value is almost zero due to the smoke of the fire, and it is determined that the sensor 100 is not abnormal again (SB6). NO), the SB6 process is repeatedly executed until it is determined that the sensor 100 has become abnormal again. On the other hand, if the calculated change rate does not correspond to the predetermined change rate during a fire and is orders of magnitude slower than the predetermined change rate during a fire, the cause is not the smoke of the fire but the contamination of the sensor 100. Assuming that there is a high possibility that the intensity difference value has become almost zero, it is determined that the sensor 100 has become abnormal again (YES in SB6), and the process proceeds to SB7.

Here, for example, when the upper reflecting portion 181 is gradually soiled due to long-term use, the intensity difference value is calculated, and when the calculated intensity difference value becomes almost zero, the past is about several minutes to about an hour. Since the change rate calculated from the intensity difference value of is an order of magnitude slower than the predetermined change rate at the time of fire, it is determined that the sensor 100 has become abnormal again.

In SB7 of FIG. 7, the control unit 24 issues an alarm. Specifically, although it is optional, for example, through a speaker (not shown) of the alarm unit 22 in FIG. 4 or an indicator lamp 221 in FIG. 2, a known method is used to re-non-function the sensor 100. Warning of normality. Here, for example, an alarm message such as "A functional failure in the second detection space of the sensor has been detected. Please perform maintenance immediately." Is repeatedly output by voice and displayed on the speaker. The blinking speed of the light 221 is increased and the display is output. This ends the move process.

After that, the administrator grasps the necessity of prompt maintenance of the sensor 100 by the alarm in SB7, turns off the power, removes the sensor 100, and performs maintenance such as cleaning. After that, the sensor 100 is installed and the power is turned on, but in this case, the movement process is started again.

Then, by performing the movement process in this way, for example, until the lower detection space 13 is contaminated and the detector 100 is determined to be abnormal (that is, before a predetermined case is reached), the lower detection is performed. Disaster prevention processing will be performed based on the space 13 side, and after the lower detection space 13 is contaminated and the detector 100 is determined to be abnormal (that is, a predetermined case is reached), the upper detection space is reached. Since the disaster prevention treatment is performed based on the 14 side, it is possible to reliably determine the fire in the monitoring area.

(Effect of embodiment)
As described above, according to the present embodiment, the fire that is an abnormality in the monitoring area is determined based on the smoke that is the detection target flowing into the lower detection space 13, or the detection target that flows into the upper detection space 14. By being able to switch whether to determine an abnormal fire in the monitoring area based on smoke, for example, even if one detection space side becomes abnormal, the other detection space side monitors. Since it is possible to determine an abnormality in the area, it is possible to determine an abnormality in the monitoring area on the normal detection space side, and a false report that notifies a fire even though there is no actual fire in the monitoring area. It is possible to reduce the frequency of occurrence of. Further, for example, even if one detection space side becomes abnormal, a fire in the monitoring area can be determined on the other detection space side without performing maintenance, so that the maintenance frequency can be reduced. It is possible to provide a sensor 100 that can be continuously used for a relatively long period of time and has a long life.

Further, before the detector 100 reaches the predetermined case, a fire in the monitoring area is determined based on the smoke flowing into the lower detection space 13, and after the detector 100 reaches the predetermined case, the upper detection space is reached. By determining the fire in the monitoring area based on the smoke flowing into 14, for example, the lower detection space 13 side and the upper detection space 14 side can be sequentially used, so that the normal detection space side and the abnormal detection space side can be used in sequence. It is possible to prevent the detection space side from being used together, and it is possible to surely reduce the frequency of false alarms.

Further, before determining the abnormality on the lower detection space 13 side, a fire in the monitoring area is determined based on the smoke flowing into the lower detection space 13, and the abnormality on the lower detection space 13 side is determined. When the determination is made, by determining the fire in the monitoring area based on the smoke flowing into the upper detection space 14, for example, it is possible to prevent the determination of the fire in the monitoring area on the detection space side where it is certain that the abnormality is abnormal. Therefore, it is possible to more reliably reduce the frequency of false reports.

Further, one of the lower detection space 13 or the upper detection space 14 is closed to the outside, and the other space in the lower detection space 13 or the upper detection space 14 is opened to the outside. As a result, for example, it is possible to prevent dust and the like from entering one space that is not used for determining a fire in the monitoring area, so that the one space side can be preserved in a normal state, and the detector 100 can be used. It is possible to reduce the maintenance frequency as a whole and reduce the maintenance cost of the sensor 100.

[Variation example with respect to the embodiment]
Although the embodiments according to the present invention have been described above, the specific configuration and means of the present invention may be arbitrarily modified and improved within the scope of the technical idea of each invention described in the claims. Can be done. Hereinafter, such a modification will be described.

(About the problem to be solved and the effect of the invention)
First, the problem to be solved by the invention and the effect of the invention are not limited to the above-mentioned contents, and may differ depending on the implementation environment and the details of the configuration of the invention, and only a part of the above-mentioned problems. May be resolved or only some of the above effects may be achieved.

(About distribution and integration)
Further, the above-described configuration is a functional concept, and does not necessarily have to be physically configured as shown in the figure. That is, the specific form of dispersion or integration of each part is not limited to the one shown in the drawing, and all or a part thereof can be functionally or physically dispersed or integrated in any unit.

(About the judgment of abnormality of the sensor)
Further, in the above embodiment, the case where the abnormality due to the contamination of the lower detection space 13 or the upper detection space 14 is determined as the abnormality of the sensor 100 has been described, but other arbitrary factors of the sensor 100 have been described. You may judge the abnormality by. For example, as the abnormality of the sensor 100, the abnormality due to the deterioration of the lower light emitting unit 161 may be determined. In this case, paying attention to each detected light, when each lower light is lower than a predetermined intensity, it may be determined that the lower light emitting unit 161 is abnormal due to deterioration.

(About the shutter part (1))
Further, in the above embodiment, the case where the shutter unit 15 is moved when the abnormality of the sensor 100 is determined has been described, but the movement timing may be arbitrarily changed. For example, when restoration is performed with SA5 in FIG. 6, the detection space in use may be polluted with smoke, so the shutter unit 15 is still moved at the timing of executing this SA5. A detection space in which smoke does not flow may be used. Further, for example, the timing at which a predetermined period (for example, 5 to 6 years) has passed since the start of using the sensor, and the timing at which the predetermined time (for example, 6:00 pm in a day) has come, etc. You may move it to.

(About the shutter part (2))
Further, the position of the shutter unit 15 may be manually moved by the administrator. In this case, as described in the embodiment, it may be possible to automatically move the shutter unit 15 using a predetermined moving mechanism, or the predetermined moving mechanism is omitted and only manual work is performed. It may be movable at.

(About the shutter part (3))
Further, the shutter unit 15 may be omitted so that smoke always flows into each detection space. In this case, the timing at which a predetermined period (for example, 5 to 6 years) has elapsed and the predetermined time (for example, for example) have passed since the sensor was simply started to be used without determining the abnormality of the sensor 100 described above. The monitoring area abnormality determination unit 241 may switch the target detection space at a timing such as 6:00 pm on the 1st.

(About the switching display)
Further, the sensor 100 of the above embodiment may be provided with a switching display unit. Here, the "switching display unit" means that the monitoring area abnormality determination unit 241 determines a fire in the monitoring area based on the smoke flowing into the lower detection space 13, or is based on the smoke flowing into the upper detection space 14. It is a display means for indicating whether to determine whether to determine a fire in the monitoring area. For example, it is provided on an indicator light such as an indicator light 221 provided on the outer surface of the housing 12 in FIG. 2 or on the outer surface of the housing 12. It is a concept that includes an electric bulletin board and the like. Then, for example, the control unit 24 of the sensor 100 may specify the target detection space selected in SA1 of FIG. 6 and display it on the switching display unit so as to indicate the specified detection space. In this case, it may be indicated by the lighting color and blinking speed of the indicator lamp or the like, or by providing a plurality of indicator lamps and changing the indicator lamp to be lit, or by displaying the information on the electric bulletin board. May be good. In this configuration, it is displayed whether the abnormality in the monitoring area is determined based on the smoke flowing into the lower detection space 13 or the fire in the monitoring area is determined based on the smoke flowing into the upper detection space 14. As a result, for example, the state of the sensor 100 can be notified to the administrator, so that maintenance such as cleaning of the sensor 100 can be performed at an appropriate timing.

(About the arrangement of components)
Further, in FIG. 3 of the above-described embodiment, the components in each detection space may be arbitrarily changed. For example, the lower light emitting unit 161 and the lower spectroscopic unit 162 may be arranged on the upper detection space 14 side. Further, for example, one light emitting means such as the lower light emitting unit 161 is provided on the lower detection space 13 side and the upper detection space 14 side, the lower spectroscopic unit 162 is omitted, and then the lower detection space 13 side is provided. The light emitting means may be configured to output the lower detection light, and the light emitting means on the upper detection space 14 side may output the upper detection light. In this way, when the light emitting means is provided one by one, one of the lower light receiving unit 172 and the upper light receiving unit 182 is omitted, and the remaining light receiving unit can receive the light from each light emitting means. Each process may be performed by configuring the above.

(About the arrangement of the lower spectroscopic part)
Further, in the above embodiment, the case where the lower spectroscopic portion 162 of FIG. 3 is provided in the translucent portion 131a of the partition portion 131 has been described, but the present invention is not limited to this. For example, after providing a hole with a diameter smaller than that of the lower spectroscopic unit 162 in the partition portion 131, the lower spectroscopic unit 162 is arranged on the lower detection space 13 side so as to close the hole, and the upper side detection is performed through this hole. It may be configured to output light.

(About the reflective part (1))
Further, in the above embodiment, the lower reflection portion 171 or the upper reflection portion 181 is omitted, and the lower detection light or the upper detection light is directly transmitted without passing through the lower reflection portion 171 or the upper reflection portion 181. Each light receiving unit may be configured to receive light.

(About the reflective part (2))
Further, in the above embodiment, after the numbers of the lower reflecting portion 171 and the upper reflecting portion 181 of FIG. 3 are aligned with each other, the lower detection space 13 side and the upper detection space 14 side are provided through the partition portion 131. It may be formed of a common reflective member extending on both sides of the.

(About the sensor status display)
Further, the sensor 100 of the above embodiment may be provided with a sensor status display unit. Here, the "sensor status display unit" is a sensor status display means for displaying the status of the sensor 100, and is, for example, the same as the switching display unit described in "(About the switching display unit)" described above. , Indicator lights, electric bulletin boards, etc. Then, for example, the sensor status display unit is displayed so that the control unit 24 of the sensor 100 can determine whether or not the sensor 100 has determined the abnormality based on the determination result of the sensor abnormality determination unit 242. The state of the sensor 100 may be displayed via the device. Further, for example, the control unit 24 of the sensor 100 is abnormal only on the lower detection space 13 side and abnormal only on the upper detection space 14 side based on the determination result of the sensor abnormality determination unit 242. Alternatively, the state of the sensor 100 may be displayed via the sensor state display unit so that abnormalities in both the lower detection space 13 side and the upper detection space 14 side can be mutually identified.

(About installation position)
Further, the sensor 100 may be installed and used on a wall surface instead of the ceiling surface of the monitoring area.

(About application)
Further, the characteristics of the above-described embodiment and the characteristics of the modified example may be applied to a scattered light type fire detector or the like as they are or by appropriately changing them.

(About features)
Further, the features of the above-described embodiment and the features of the modified example may be arbitrarily combined.

(Additional note)
The detector of Appendix 1 includes a first detection space into which the detection target in the monitoring area flows, a second detection space into which the detection target flows, and the second detection space different from the first detection space. The monitoring area abnormality determining means for determining an abnormality in the monitoring area based on the detection target flowing into the first detection space or the second detection space is provided, and the monitoring area abnormality determining means is the first. It is possible to switch between determining the abnormality in the monitoring area based on the detection target flowing into the detection space and determining the abnormality in the monitoring area based on the detection target flowing into the second detection space. There is.

The sensor of Appendix 2 is the sensor according to Appendix 1, wherein the monitoring area abnormality determining means is based on the detection target flowing into the first detection space before the sensor reaches a predetermined case. The abnormality in the monitoring area is determined, and after the sensor reaches the predetermined case, the abnormality in the monitoring area is determined based on the detection target flowing into the second detection space.

The sensor according to Appendix 3 outputs at least the first detection light that passes through the first detection space and at least the second detection light that passes through the second detection space in the sensor according to Appendix 2. Light emitting means that emits light, the first detection light that has passed through the first detection space, the light receiving means that receives the second detection light that has passed through the second detection space, and the light receiving means that has received light. Based on the first detection light and the second detection light, the sensor abnormality determination means for determining the abnormality on the first detection space side of the sensor is provided, and the monitoring area abnormality determination means is provided. Before the sensor non-normality determining means determines the non-normality of the sensor on the first detection space side, it is assumed that the sensor is before a predetermined case is reached in the first detection space. When an abnormality in the monitoring area is determined based on the inflowing detection target and the sensor abnormality determination means determines the abnormality on the first detection space side of the sensor, the sensor determines the abnormality. Assuming that the predetermined case has been reached, the abnormality in the monitoring area is determined based on the detection target flowing into the second detection space.

The sensor according to the appendix 4 is the sensor according to any one of the items 1 to 3, wherein the monitoring area abnormality determining means has an abnormality in the monitoring area based on the detection target flowing into the first detection space. Is provided, or a display means for displaying whether to determine an abnormality in the monitoring area based on the detection target flowing into the second detection space.

The sensor according to the appendix 5 is the sensor according to any one of the items 1 to 4, wherein one of the first detection space and the second detection space is closed to the outside, and the first detection space is closed. The monitoring area abnormality determining means includes the opening / closing means for opening the detection space or the other space in the second detection space to the outside, and the monitoring area abnormality determining means is based on the detection target in the other space. Judge the abnormality of.

(Effect of appendix)
According to the detector described in Appendix 1, the abnormality in the monitoring area is determined based on the detection target flowing into the first detection space, or the abnormality in the monitoring area is determined based on the detection target flowing into the second detection space. By being able to switch between the two, for example, even if one detection space side becomes abnormal, the other detection space side can determine an abnormality in the monitoring area, which is normal. It is possible to determine the abnormality in the monitoring area on the detection space side, and it is possible to reduce the frequency of false reports that notify the abnormality even though the abnormality has not actually occurred in the monitoring area. Further, for example, even if one detection space side becomes abnormal, it is possible to determine an abnormality in the monitoring area on the other detection space side without performing maintenance, so that the maintenance frequency can be reduced. , It becomes possible to provide a sensor that can be used continuously for a relatively long period of time and has a long life.

According to the sensor described in Appendix 2, before the sensor reaches the predetermined case, the abnormality in the monitoring area is determined based on the detection target flowing into the first detection space, and the sensor reaches the predetermined case. After that, by determining the abnormality in the monitoring area based on the detection target flowing into the second detection space, for example, the first detection space side and the second detection space side can be sequentially used, which is normal. It is possible to prevent the detection space side and the abnormal detection space side from being used together, and it is possible to surely reduce the frequency of false reports.

According to the detector described in Appendix 3, before determining the abnormality on the first detection space side, the abnormality in the monitoring area is determined based on the detection target flowing into the first detection space, and the first detection is performed. When the abnormality on the space side is determined, the abnormality in the monitoring area is determined based on the detection target flowing into the second detection space. Since it is possible to prevent the abnormality from being determined, it is possible to more reliably reduce the frequency of false reports.

According to the sensor described in Appendix 4, the abnormality in the monitoring area is determined based on the detection target flowing into the first detection space, or the abnormality in the monitoring area is determined based on the detection target flowing into the second detection space. By displaying whether or not to do so, for example, the state of the sensor can be notified to the administrator, so that maintenance such as cleaning of the sensor can be performed at an appropriate timing.

According to the sensor described in Appendix 5, one space in the first detection space or the second detection space is closed to the outside, and the other space in the first detection space or the second detection space is closed. By opening it to the outside, for example, it is possible to prevent dust and the like from entering one space that is not used for determining an abnormality in the monitoring area, so that one space side is preserved in a normal state. This makes it possible to reduce the maintenance frequency of the sensor as a whole and reduce the maintenance cost of the sensor.

11 Mounting base 12 Housing 13 Lower detection space 14 Upper detection space 15 Shutter 21 Detection unit 22 Alarm 23 Recording unit 24 Control 100 Sensor 121 Opening 131 Partition 131a Translucent 131b Shading 132 Lower labyrinth 133 Lower insect screen 134 Cover 141 Base 142 Upper labyrinth 143 Upper labyrinth 161 Lower light emitting 162 Lower spectroscopic 171 Lower reflector 172 Lower receiver 181 Upper reflector 182 Upper receiver 221 Indicator light 241 Monitoring area Abnormality judgment unit 242 Sensor abnormality judgment unit 900 Installation surface

Claims (5)

It ’s a sensor,
The first detection space into which the detection target in the monitoring area flows in,
The second detection space into which the detection target flows, which is different from the first detection space, and the second detection space.
A monitoring area abnormality determining means for determining an abnormality in the monitoring area based on the detection target flowing into the first detection space or the second detection space is provided.
The monitoring area abnormality determining means determines an abnormality in the monitoring area based on the detection target flowing into the first detection space, or determines the abnormality of the monitoring area based on the detection target flowing into the second detection space. It is possible to switch whether to judge an abnormality,
Before the sensor reaches a predetermined case, the monitoring area abnormality determining means determines an abnormality in the monitoring area based on the detection target flowing into the first detection space, and the sensor determines the abnormality of the monitoring area. After reaching the case, an abnormality in the monitoring area is determined based on the detection target flowing into the second detection space.
The sensor
A light emitting means that emits light so that at least the first detection light passing through the first detection space and at least the second detection light passing through the second detection space are output.
A light receiving means that receives the first detection light that has passed through the first detection space and the second detection light that has passed through the second detection space.
A sensor abnormality determining means for determining abnormalities on the first detection space side of the sensor based on the first detection light and the second detection light received by the light receiving means is provided.
The monitoring area abnormality determining means assumes that before the sensor abnormality determining means determines abnormalities on the first detection space side of the sensor, it is before the sensor reaches a predetermined case. , The abnormality in the monitoring area was determined based on the detection target flowing into the first detection space, and the sensor abnormality determining means determined the abnormality on the first detection space side of the sensor. In this case, assuming that the sensor has reached the predetermined case, the abnormality in the monitoring area is determined based on the detection target flowing into the second detection space.
sensor. The first detection space into which the detection target in the monitoring area flows in,
The second detection space into which the detection target flows, which is different from the first detection space, and the second detection space.
A monitoring area abnormality determining means for determining an abnormality in the monitoring area based on the detection target flowing into the first detection space or the second detection space is provided.
The monitoring area abnormality determining means determines an abnormality in the monitoring area based on the detection target flowing into the first detection space, or determines the abnormality of the monitoring area based on the detection target flowing into the second detection space. It is possible to switch whether to judge an abnormality,
The monitoring area abnormality determining means determines an abnormality in the monitoring area based on the detection target flowing into the first detection space, or determines the abnormality of the monitoring area based on the detection target flowing into the second detection space. A display means for displaying whether or not an abnormality is determined is provided.
sensor. Before the sensor reaches a predetermined case, the monitoring area abnormality determining means determines an abnormality in the monitoring area based on the detection target flowing into the first detection space, and the sensor determines the abnormality of the monitoring area. After reaching the case, the abnormality in the monitoring area is determined based on the detection target flowing into the second detection space.
The sensor according to claim 2. A light emitting means that emits light so that at least the first detection light passing through the first detection space and at least the second detection light passing through the second detection space are output.
A light receiving means that receives the first detection light that has passed through the first detection space and the second detection light that has passed through the second detection space.
A sensor abnormality determining means for determining abnormalities on the first detection space side of the sensor based on the first detection light and the second detection light received by the light receiving means is provided.
The monitoring area abnormality determination means is assumed to be before the sensor abnormality determination means determines the abnormality on the first detection space side of the sensor before the sensor reaches a predetermined case. , The abnormality in the monitoring area was determined based on the detection target flowing into the first detection space, and the sensor abnormality determining means determined the abnormality on the first detection space side of the sensor. In this case, assuming that the sensor has reached the predetermined case, the abnormality in the monitoring area is determined based on the detection target flowing into the second detection space.
The sensor according to claim 3. Opening and closing that closes one of the first detection space or the second detection space to the outside and opens the other space in the first detection space or the second detection space to the outside. Means, equipped with
The monitoring area abnormality determining means determines an abnormality in the monitoring area based on the detection target in the other space.
The sensor according to any one of claims 1 to 4.

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