Device and method for checking detected visual field

Abstract

To provide a device and a method for checking a detected field of view, which can easily install an abnormality detector so that no area to be monitored is excluded from the detected field of view, check the detected field of view of the installed abnormality detector, and create a document recording the detected field of view. [Solution] The present invention is a detection field confirmation device for an anomaly detector, comprising a camera unit that acquires a detection field image corresponding to the detection field of the anomaly detector, and an engagement unit that abuts and engages with the anomaly detector so that the camera unit is positioned in front of the sensor of the existing anomaly detector, in the direction in which the detection field of the existing anomaly detector is located, and by engaging the engagement unit with the anomaly detector, it is possible to confirm the detection field of the anomaly detector from the image taken by the camera unit.

Description

[Technical Field]

[0001] The present invention relates to a detection field confirmation device and a detection field confirmation method for confirming a detection field that defines a detection area in an abnormality detector such as a flame detector. [Background technology]

[0002] Flame detectors, which detect infrared rays emitted from flames, are attached to ceilings, walls, etc. to monitor a specified area. Flame detectors must be installed so that the area to be monitored falls within their detection field of view V. For example, if multiple flame detectors 1 are installed on the ceiling 21 of a building 2 to monitor the direction of the floor 22, the flame detectors 1 are installed so that their detection fields V overlap, as shown in Figure 1, and no monitored area is outside the detection field. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-83379 Summary of the Invention [Problem to be solved by the invention]

[0004] To confirm the detection area of ​​a flame detector, Patent Document 1 discloses a confirmation device with a laser pointer installed at the position of the flame detector 1, and the tilted laser pointer is rotated. The tilt of the laser pointer is adjusted in the direction of the field of view of the flame detector 1. The inside of the cone through which the laser beam passes is the detection field V, and the inside of the circle drawn on the floor 22 is the detection area. Using multiple detection areas, it is then confirmed whether the target area to be monitored can be monitored. However, because the light from the laser pointer only displays the outer edge, it can be difficult to determine the extent of the detection field V when the outer edge cannot be clearly drawn due to an obstacle.

[0005] Furthermore, as shown in Figure 2, when monitoring the entire building 2 outdoors with a flame detector 1, it is possible to draw a circle on the ground 3 or the wall of the building 2 with the laser pointer of the confirmation device. However, if the outer edge of the detection field V is in the air, it is not possible to draw a circle. Therefore, in such cases, it is difficult to confirm the detection field V. Furthermore, if it were possible to provide the owner of the building 2 with easy-to-understand documentation on the detection field V and detection area, it would be a high-level service to customers. However, creating such documentation is also difficult. The same applies to anomaly detectors other than the flame detector 1 that have a detection field.

[0006] To provide a detection field confirmation device and a detection field confirmation method that make it easy to install an abnormality detector so that no monitored area is excluded from the detection field V, to check the detection field V of the installed abnormality detector, and to create materials recording the detection field V. [Means for solving the problem]

[0007] One embodiment of the present invention is a detection field confirmation device for an anomaly detector, comprising a camera unit that acquires a detection field image corresponding to the detection field of the anomaly detector, and an engagement unit that abuts and engages with the anomaly detector so that the camera unit is positioned in front of the sensor of the existing anomaly detector, in the direction in which the detection field of the existing anomaly detector is located, and by engaging the engagement unit with the anomaly detector, the detection field of the anomaly detector can be confirmed using the image captured by the camera unit. [Effects of the Invention]

[0008] By acquiring an image corresponding to the detection field of the anomaly detector using the camera unit, information on the detection field V can be easily obtained. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a diagram showing the detection field of view when multiple flame detectors are installed on the ceiling of a building. [Figure 2]FIG. 1 is a diagram showing the detection field of a flame detector that monitors a building from outdoors. [Figure 3] FIG. 2 is a front view of the sensory field confirmation device according to the first embodiment. [Figure 4] FIG. 2 is a side view of the sensory field confirmation device according to the first embodiment. [Figure 5] FIG. 2 is a front view of the flame detector according to the first embodiment. [Figure 6] FIG. 2 is a front view of the detection field confirmation device according to the first embodiment attached to the flame detector. [Figure 7] 10A and 10B are front views of covers with different opening sizes. [Figure 8] Image obtained using a detection field confirmation device on the flame detector in Figure 2. [Figure 9] FIG. 10 is a front view of the sensory field confirmation device according to the second embodiment. [Figure 10] FIG. 11 is a front view of the detection field confirmation device according to the third embodiment. [Figure 11] FIG. 11 is a side view of the detection field confirmation device according to the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] In this application, the direction in which the detection field V of the anomaly detector is located is referred to as the "forward direction," and the opposite direction is referred to as the "rearward direction." The detection field confirmation device is referred to as the "forward direction" and "rearward direction" when attached to the anomaly detector. [Example]

[0011] 3 and 4 show the detected field of view confirmation device 5 in Example 1. FIG. 3 is a front view, and FIG. 4 is a side view. Dotted lines indicate hidden structures. In the detected field of view confirmation device 5, a camera unit 52 is supported in front of a support unit 51. The front and periphery of the camera unit 52 are covered by a rubber cover 54. The inner surface of the cover 54 is shaped to fit the outer periphery of the camera unit 52, and the cover 54 can be fixed in a predetermined position by placing it over the camera unit 52. When the cover 54 is fixed in a predetermined position, the opening 541 of the cover 54 is located in front of the camera unit 52. The support unit 51 is placed at the installation position or planned installation position of the flame detector 1, which is an anomaly detector, so that the detected field of view V can be confirmed.

[0012] When checking the detection field of view V, an image is taken from camera unit 52 through opening 541 in cover 54. The area inside the dashed dotted line extending from the front of opening 541 shown in FIG. 4 is the area of ​​field of view V1 of camera unit 52, which corresponds to detection field of view V, and objects within this area can be photographed. The area outside field of view V1 is shielded from light by cover 54 and cannot be photographed. Camera unit 52 is used with a deep depth of field so that the outline of opening 541 can be easily captured.

[0013] Fig. 5 shows a front view of a flame detector 1 according to an embodiment for checking the detection field of view V. Flame detector 1 has an outer peripheral surface 12 that is roughly square when viewed from the front, and is equipped with a flame detection sensor 11 on the front. In flame detector 1, three infrared sensors are arranged side by side as flame detection sensor 11, and flame detection sensor 11 is elongated on one side.

[0014] Meanwhile, the detection field confirmation device 5 has a fitting portion 53 provided behind the support portion 51. In the fitting portion 53 of Example 1, fitting legs 531 protrude rearward from the four ends of a cross-shaped plate. The fitting legs 531 are shaped to fit the outer peripheral surface 12 of the flame detector 1 that confirms the detection field V. When the detection field confirmation device 5 is attached to the flame detector 1 to confirm the detection field V, the fitting legs 531 of the fitting portion 53 abut against the outer peripheral surface 12 of the flame detector 1, which is the anomaly detector shown in FIG. 5 . Furthermore, the detection field confirmation device 5 is aligned in front of the flame detector 1 by abutting the fitting bottom 532 of the detection field confirmation device 5 against the front surface of the flame detector 1.

[0015] As shown in Fig. 6, the detection field confirmation device 5 is positioned so that the fitting portion 53 surrounds the flame detector 1. At this time, the camera portion 52 is positioned in front of the flame detection sensor 11 of the flame detector 1 shown in Fig. 5. The camera portion 52 acquires a detection field image 61, which is an image corresponding to the detection field V of the flame detector 1. The field of view V1 of the camera portion 52 is determined by an opening 541 in a cover 54 attached to the camera portion 52. The fitting portion 53 is detachable from the support portion 51, and can be replaced with a fitting portion 53 corresponding to a different flame detector 1 product.

[0016] Figure 7 shows two types of covers 54, 55. Opening 551 of cover 55 in Figure 7(b) is smaller than opening 541 of cover 54 shown in Figure 7(a). As mentioned above, cover 54 is made of rubber and can be removed from camera unit 52 and is replaceable. Figure 7(a) shows cover 54 in the detection field confirmation device 5 shown in Figures 3, 4, and 6. By replacing this with cover 55 in Figure 7(b), the angle of field V1 can be narrowed. Openings 541 and 551 are sized to correspond to the detection field V of the flame detector 1.

[0017] The angle of the sensing field V of the flame detector 1 is fixed depending on the product, but by making it possible to replace the cover with one having a different opening in this way, the sensing field confirmation device 5 can be made compatible with different products of the flame detector 1 or other abnormality detectors.

[0018] When using the detected visual field confirmation device 5, a cover 54 that matches the angle of the detected visual field V of the flame detector 1 is attached to the camera unit 52, and a fitting portion 53 that matches the flame detector 1 is attached to the support portion 51. Then, by fitting the fitting portion 53 of the detected visual field confirmation device 5 to the flame detector 1 using the fitting legs 531 and the fitting bottom 532 as described above, the field of view V1 of the camera unit 52 approximately coincides with the detected visual field V of the flame detector 1. Even if the angle at which the field of view V1 of the camera unit 52 extends forward is the same as the angle at which the detected visual field V of the flame detector 1 extends forward, because the camera unit 52 is installed in front of the flame detector 1, the field of view V1 of the camera unit 52 is slightly smaller than the detected visual field V of the flame detector 1. However, this slight reduction in size prevents the area outside the detected visual field V of the flame detector 1 from being displayed as the detected visual field image 61, so no problem occurs.

[0019] The image is captured with the detected field of view confirmation device 5 positioned on the flame detector 1. The image 6 captured by the camera unit 52 is transmitted to a smartphone (not shown) via Bluetooth (registered trademark). FIG. 8 shows the image 6 displayed on the smartphone. FIG. 8 shows the image 6 captured when the detected field of view confirmation device 5 is installed on the pillar 4 shown in FIG. 2 and the building 2 is photographed. The area within the circle in which the building 2 appears in the image 6 is the detected field of view image 61. The black area outside the circle is the light-shielded area image 62 blocked by the cover 54. In Example 1, the camera unit 52 has a lens with a deep depth of field. However, because the opening 541 of the cover 54 is close to the camera unit 52, the boundary between the detected field of view image 61 and the light-shielded area image 62 may not be in focus. However, it is possible to confirm the detected field of view V.

[0020] When checking the detection field V of a flame detector 1 to install a flame detector 1 or inspect an existing flame detector 1, an image is taken with the detection field confirmation device 5 positioned on the flame detector 1. The worker can adjust the installation position of the flame detector 1 while checking an image 6 of the detection field V displayed on the smartphone as shown in Figure 8. In this way, as a detection field confirmation method, the worker positions the detection field confirmation device 5 with the camera unit 52 in front of the flame detector 1, which is an abnormality detector, and checks the detection field V of the flame detector 1 using the image 6 taken by the camera unit 52. [Example]

[0021] Furthermore, a detection field confirmation device 7 can be formed by providing a long portion 77 to the detection field confirmation device 5 of Example 1. The detection field confirmation device 7 provided with the long portion 77 can be used for a flame detector 1 to be installed at a high location to check the detection field V of an existing flame detector 1 during inspection, or to check the detection field V of a planned installation location before installing the flame detector 1. Figure 9 shows the detection field confirmation device 7 provided with the long portion 77. The fitting portion 73 has the same structure as the fitting portion 53 of Example 1, and the fitting portion 73 allows the detection field confirmation device 7 to be positioned in front of the flame detector 1. The cover 74 is also similar to the cover 54 of Example 1, and defines the detection field V with an opening 741.

[0022] In the detected visual field confirmation device 7 of Example 2, both sides of a support part 71, which corresponds to the support part 51 of the detected visual field confirmation device 5 of Example 1, are rotatably supported by a shaft 76 provided near the tip of a support arm 75. The support arm 75 has a substantially U-shape, and its center is connected to one end of a long part 77. The area near the other end of the long part 77 is where the worker lifts the detected visual field confirmation device 7 with their hand, and a smartphone holder 78 is provided at a position slightly away from the other end.

[0023] The worker clamps and fixes a smartphone (not shown) in the holder 78. The smartphone is connected to the camera unit 72 via Bluetooth (registered trademark). Then, an image 6 such as that shown in FIG. 8 taken by the camera unit 72 is displayed on the smartphone screen so that the worker can check it. The worker can also store the image 6 in the smartphone and use it to create materials. [Example]

[0024] Example 3 is intended to make it easier to focus on the boundary between the sensing field image 61 and the light-shielded area image 62 in the image 6 shown in Fig. 8. Fig. 10 shows a front view of Example 3, and Fig. 11 shows a side view. In the sensing field confirmation device 8 of Example 3, a light-shielding tube 84 is used instead of the covers 54, 55, and 74 of Examples 1 and 2. The light-shielding tube 84 is a cylindrical member, and is attached to the support part 81 so as to be interchangeable with other light-shielding tubes having different lengths, radii, etc. This is to accommodate the fact that the angle of the sensing field V varies depending on the flame detector 1 product, and is similar to the fact that the covers 54 and 55 of Example 1 are interchangeable.

[0025] 11, opening 841 of light-shielding tube 84 is provided at a position some distance from the front surface of camera unit 82. Therefore, by using camera unit 82 with a deeper depth of field, it becomes easier to focus on the boundary between sensory field of view image 61 and light-shielded area image 62 in image 6 shown in FIG.

[0026] In the same manner as in the first and second embodiments, in the third embodiment, a fitting portion 83 having a fitting leg 831 and a fitting bottom 832 is provided behind the support portion 81. Meanwhile, in the third embodiment, a weight 85 is provided below the support portion 81. When the long portion 77 is attached and used as in the second embodiment, the weight 85 is used to provide balance, and the angle of the fitting portion 83 having the fitting leg 831 can be adjusted so that it is easy to attach to the flame detector 1. The weight 85 may also be used in the detection field confirmation devices 5 and 7 of the first and second embodiments.

[0027] Although the embodiments of the present invention have been described in detail above with reference to the drawings, the specific configurations are not limited to these embodiments, and the present invention also includes design changes within the scope of the present invention. Furthermore, the above-described embodiments can be combined by utilizing each other's technologies as long as there are no particular contradictions or problems in their purposes, configurations, etc.

[0028] For example, the support part and the camera part may be integrally formed, or the support part and the fitting part may be integrally formed. Also, the fitting part may be detachable from the main body of the support part. The fitting part may have any shape as long as it fits. For example, the fitting part may be a recessed part having the same shape as the outer peripheral surface of the anomaly detector. Also, in a method of use in which a detection field confirmation device is placed at the planned installation location of the anomaly detector to confirm the detection field of the anomaly detector, the fitting part may not be necessary.

[0029] In the embodiment, the field of view V1 was defined by a cover to obtain the sensory field image 61. However, an image corresponding to the sensory field may be displayed by software without using a cover or the like to define the field of view V1. For example, an image can be obtained by image processing in which the image area that becomes the sensory field is the sensory field image and the outside is a light-shielded area image, such as black, in accordance with the lens characteristics of the camera unit.

[0030] In the embodiment, a flame detector is used as an anomaly detector. However, the detection field confirmation device may be used for other anomaly detectors that have a detection field. For example, it may be applied to ultrasonic sensors or pyroelectric sensors used for intrusion detection. [Explanation of symbols]

[0031] 1 flame detector, 11 flame detection sensor, 12 outer periphery, 2 buildings, 21 ceilings, 22 floors, 3 ground, 4 pillars, 5 sensing field confirmation device, 51 support part, 52 camera part, 53 fitting part, 531 fitting leg, 532 fitting bottom, 54 cover, 541 opening, 55 cover, 551 opening, 6 images, 61 sensory field image, 62 shading area image, 7 sensing field confirmation device, 71 support part, 72 camera part, 73 fitting part, 74 cover, 741 opening, 75 support arm, 76 axis, 77 long part, 78 holder, 8 sensing field confirmation device, 81 support part, 82 camera part, 83 fitting part, 831 fitting leg, 832 fitting bottom, 84 light shielding tube, 841 opening, 85 weight, V sensing field, V1 field of view

Claims

1. a camera unit for acquiring a detection field image corresponding to the detection field of the anomaly detector; a fitting portion that abuts against and fits onto the anomaly detector so that the camera portion is positioned in front of the sensor of the existing anomaly detector, which is in the direction of the detection field of the existing anomaly detector; A detection field confirmation device for an anomaly detector, characterized in that by fitting the fitting portion to the anomaly detector, the detection field of the anomaly detector can be confirmed using an image taken by the camera portion.

2. 2. The device for checking a detection field of view of an anomaly detector according to claim 1, wherein the fitting portion is fitted to an outer surface of the anomaly detector by abutting against the outer surface of the anomaly detector.

3. A detection field confirmation device for an abnormality detector as described in claim 1 or 2, characterized in that an image area that becomes the detection field is made into a detection field image, and an image outside the detection field image is made into a light-blocking area image is obtained by image processing.

4. A method for confirming the field of view of an anomaly detector, characterized in that the fitting part of a field of view confirmation device having a camera part is abutted against and fitted into an anomaly detector, thereby aligning the field of view confirmation device in front of the anomaly detector so that the camera part is located in front of the sensor of the existing anomaly detector, which is the direction in which the field of view of the existing anomaly detector is located, and confirming the field of view of the anomaly detector using an image captured by the camera part.

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