Flame detector testing device

Abstract

To obtain a flame detector testing device that can achieve stable operational test accuracy when conducting operational tests of flame detectors in various operational test environments. [Solution] The system comprises a light source that outputs light containing infrared and visible light components as continuous irradiation light, an optical chopper that generates flashing light by performing a chopping operation that repeatedly passes / blocks the continuous irradiation light at a chopping frequency corresponding to the flickering frequency of a flame, and a control unit that comprehensively controls the light source and the optical chopper. The control unit has a mode switching function that allows selection between a lighting mode, which generates steady light by controlling the light source to be ON and performing stop position control to stop the optical chopper at a position where the continuous irradiation light passes through, and a flashing mode, which generates flashing light by controlling the light source to be ON and performing chopping control to perform the chopping operation.

Description

Technical Field

[0001] The present disclosure relates to a flame detector test apparatus for performing an operation test of a flame detector.

Background Art

[0002] As disaster prevention equipment for detecting and notifying a fire, there are various types of flame detectors. Specific types of flame detectors include an infrared spot type detector and an ultraviolet spot type detector.

[0003] Regarding the infrared spot type detector and the ultraviolet spot type detector, it is necessary to perform an operation test during a fire inspection and maintenance inspection defined by laws and regulations. In order to perform such an operation test, a flame detector operation tester is used (for example, see Non-Patent Document 1).

[0004] The flame detector operation tester according to Non-Patent Document 1 is configured to use two types of light sources and emit infrared rays and ultraviolet rays simultaneously, so that it can cope with the operation tests of both the infrared spot type detector and the ultraviolet spot type detector. The operation tests of the infrared spot type detector and the ultraviolet spot type detector can be generally performed as follows by using the flame detector operation tester according to Non-Patent Document 1.

[0005] <Operation Test of Infrared Spot Type Detector> The infrared spot type detector operates by detecting the "flickering" of infrared rays. Therefore, the flame detector operation tester makes the infrared rays emitted by the krypton lamp flicker by blinking with an internal electric circuit to confirm the operation of the infrared spot type detector.

[0006] <Operation Test of Ultraviolet Spot Type Detector> Ultraviolet spot-type detectors operate by detecting ultraviolet light. Therefore, the flame detector operation tester confirms the operation of the ultraviolet spot-type detector by emitting weak ultraviolet light, similar to that of a lighter flame, from an ultraviolet discharge tube, which matches the spectral sensitivity of the ultraviolet spot-type detector.

[0007] The procedure for performing an operational test using a flame detector testing device is generally as follows: Step 1: Power on Turn the power switch ON. This will cause the krypton bulb to blink and the ultraviolet discharge tube to light up.

[0008] Step 2: Place the flame detector test device within the operating distance and perform the operation test. The operating distance of the flame detector activation tester is within 20 cm in front of the flame detector. Therefore, the activation test can be performed by placing the flame detector activation tester within 20 cm in front of the flame detector being tested and illuminating the light-receiving surface of the flame detector with the center of the flashing infrared light.

[0009] Step 3: Evaluation of the operational test If a flame detector activates within 30 seconds of being illuminated, it is functioning correctly. Conversely, if it does not activate after 30 seconds of illumination, it is malfunctioning. Flame detectors are equipped with an indicator light that illuminates when activated, and by visually checking whether the indicator light illuminates within 30 seconds, it is possible to determine whether it has functioned correctly. [Prior art documents] [Non-patent literature]

[0010] [Non-Patent Document 1] Nohmi Disaster Prevention Co., Ltd. Homepage, Flame Detector Operation Tester (URL: https: / / www.nohmi.co.jp / shoninzu / 015 / 015-0001.html) [Overview of the project] [Problems that the invention aims to solve]

[0011] When performing an operational test of a flame detector installed at a high location using the flame detector operational tester described in Non-Patent Literature 1, the tester generally needs to attach the flame detector operational tester to one end of a support rod, and while holding the other end of the support rod, position the flame detector operational tester so that it is within 20 cm of the front of the flame detector.

[0012] However, in large-scale facilities, flame detectors may be installed in areas with ceilings too high to reach with support rods. Furthermore, depending on the installation environment, flame detectors may be installed above ducts, pipes, etc. Additionally, objects may be placed on the floor directly below the flame detector.

[0013] In these cases, it is impossible or difficult to perform a functional test of the flame detector using a support rod directly below it. While it is possible to temporarily set up scaffolding or similar equipment for the functional test, this is a time-consuming process.

[0014] Therefore, there is a need to realize a flame detector testing device that can easily perform operational tests on flame detectors installed at high places in various operational test environments without using support rods.

[0015] In this situation, where the distance between the detector test device and the flame detector is large, obtaining stable operational test accuracy requires accurately positioning the optical axis of the test light output from the flame detector test device so that it is directed towards the flame detector being tested.

[0016] Furthermore, even if the flame detector is not installed at a high location, if a worker carries the flame detector test device and conducts an operational test, even if the distance between the test device and the flame detector is short, a slight tilt of the test device will reduce the amount of test light that the flame detector can receive. As a result, the operational test results will vary depending on the amount of test light received by the flame detector, and there is a risk that stable operational test accuracy cannot be obtained.

[0017] Therefore, in various operational test environments, such as whether or not a support rod is used, or whether or not the flame detector is installed at a high location, accurately positioning the optical axis of the test light output from the flame detector test device toward the flame detector being tested is crucial for obtaining stable operational test accuracy.

[0018] This disclosure was made to solve the above-mentioned problems and aims to provide a flame detector testing device that can achieve stable operational test accuracy when conducting operational tests of flame detectors in various operational test environments. [Means for solving the problem]

[0019] The flame detector testing apparatus described herein is a flame detector testing apparatus that irradiates a flame detector with test light for performing an operational test of the flame detector, and is equipped with a light source capable of outputting a continuous irradiation light that is visible in the same axis direction as the test light. Furthermore, the flame detector test device according to this disclosure further comprises an optical chopper that generates flashing light that turns on and off at a period corresponding to the chopping frequency by performing a chopping operation that repeatedly passes / blocks continuous irradiation light output from a light source at a chopping frequency corresponding to the flickering frequency of a flame, and a control unit that comprehensively controls the light source and the optical chopper. The light source outputs light containing infrared and visible light components as continuous irradiation light, and the control unit has a mode switching function that allows selection between a lighting mode that generates lit light by controlling the light source to the ON state and performing stop position control to stop the optical chopper at a position through which the continuous irradiation light output from the light source passes, and a flashing mode that generates flashing light by controlling the light source to the ON state and performing chopping control to cause the optical chopper to perform a chopping operation. [Effects of the Invention]

[0020] According to the present disclosure, when conducting an operation test of a flame detector in various operation test environments, a flame detector test device capable of achieving stable operation test accuracy can be obtained.

Brief Description of the Drawings

[0021] [Figure 1] It is a functional block diagram of a flame detector test device according to Embodiment 1 of the present disclosure. [Figure 2] It is an explanatory diagram regarding an optical chopper used in the flame detector test device according to Embodiment 1 of the present disclosure. [Figure 3] It is an explanatory diagram when conducting an operation test of a flame detector using a conventional flame detector test device. [Figure 4] It is an explanatory diagram when conducting an operation test of a flame detector using the flame detector test device according to Embodiment 1 of the present disclosure. [Figure 5] It is an explanatory diagram showing the merits of the chopper method adopted to generate blinking light in the flame detector test device according to Embodiment 1 of the present disclosure. [Figure 6] It is an explanatory diagram regarding the arrangement of an optical chopper used in the flame detector test device according to Embodiment 1 of the present disclosure.

Modes for Carrying Out the Invention

[0022] Hereinafter, preferred embodiments of the flame detector test device of the present disclosure will be described with reference to the drawings. The flame detector test device according to the present disclosure has, as a function not implemented in a conventional flame detector test device, a function capable of outputting continuous irradiation light visible in the coaxial direction with the test light (that is, corresponding to the central axis direction in the irradiation direction of the test light). As a result, by outputting continuous irradiation light visible to the flame detector, the alignment of the flame detector test device with respect to the flame detector can be easily performed.

[0023] Furthermore, the flame detector test apparatus according to this disclosure can employ a light source that outputs light containing infrared and visible light components as continuous irradiation light. When such a light source is employed, a control unit that comprehensively controls the light source and the optical chopper can be configured to have a mode switching function that allows the continuous irradiation light output from the light source to be selectively switched between a lighting mode that generates lit light and a flashing mode that generates flashing light.

[0024] This configuration allows for easy targeting of flame detectors installed at a distance from the flame detector testing device using the illuminated light. Furthermore, by using flashing light with a desired brightness difference generated by a light chopper from continuous illumination, the operating distance can be significantly extended from the conventional 20 cm. As a result, operational tests of flame detectors installed at high places can be easily performed from a distance, such as from the ground, without the need for support rods.

[0025] In the following Embodiment 1, a specific example will be described in which a light source capable of outputting continuous illumination light containing infrared and visible light components is used. By combining such a light source with an optical chopper, it is possible to generate both steady light and flashing light. The steady light can be used to facilitate aiming, and the flashing light can be used to perform operational tests of infrared spot-type detectors.

[0026] However, the flame detector testing apparatus described herein is not limited to such a configuration. It is also possible to add a light source that outputs a continuous illumination light visible in the same axis direction as the test light to a conventional flame detector testing apparatus.

[0027] In either configuration, by using a visible illuminated light to facilitate aiming, stable operational test accuracy can be achieved when conducting operational tests of flame detectors in various operational test environments.

[0028] Embodiment 1. Figure 1 is a functional block diagram of a flame detector testing apparatus according to Embodiment 1 of the present disclosure. The flame detector testing apparatus 10 according to Embodiment 1 comprises a light source 11, an optical chopper 12, and a control unit 13, and is used when performing operational tests on a flame detector 100.

[0029] The light source 11 outputs light containing infrared and visible light components as continuous illumination. Examples of light sources 11 include halogen lamps and LEDs.

[0030] Furthermore, as a light source 11 that continuously irradiates light containing infrared and visible light components, it is possible to adopt a configuration that uses a single light source capable of irradiating from the visible light component to the infrared light component, or it is also possible to adopt a configuration that uses two separate light sources: one that irradiates the infrared light component and another that irradiates the visible light component.

[0031] The optical chopper 12 performs a chopping operation on the continuous light output from the light source 11, repeatedly passing / blocking it at a chopping frequency corresponding to the flame flicker frequency. This generates a blinking light that turns on and off at a period corresponding to the chopping frequency. Here, 4 kHz is given as an example of a chopping frequency corresponding to the flame flicker frequency.

[0032] Furthermore, if the optical chopper 12 is stopped at a position that allows the continuous illumination light output from the light source 11 to pass through without performing a chopping operation, it can generate illumination light using the continuous illumination light without interrupting the continuous illumination light.

[0033] Figure 2 is an explanatory diagram of an optical chopper 12 used in a flame detector testing apparatus 10 according to Embodiment 1 of the present disclosure. The optical chopper 12 is configured to include a rotating shaft 12a and a chopper plate 12b.

[0034] The optical chopper 12 performs a chopping operation based on an external command, by rotating the chopper plate 12b, which alternates between periods when the continuous illumination light output from the light source 11 is blocked by the chopper plate 12b and periods when the chopper plate 12b is absent, allowing the light to pass through. Figure 2 illustrates a state in which the continuous illumination light output from the light source 11 is not blocked by the chopper plate 12b.

[0035] The optical chopper 12 performs a chopping operation that repeatedly passes / blocks continuous irradiation light at a chopping frequency corresponding to the flickering frequency of a flame, thereby generating a flashing light that turns on and off at a period corresponding to the chopping frequency. The generated flashing light contains an infrared light component, and this flashing light can be used to perform operational tests on infrared spot-type detectors.

[0036] The control unit 13 is a controller that provides overall control for the light source 11 and the optical chopper 12. Specifically, the control unit 13 performs on / off control for the light source 11 and performs stop position control and chopping control for the optical chopper 12.

[0037] The control contents of the "on / off control," "stop position control," and "chopping control" performed by the control unit 13 can be summarized as follows:

[0038] <On / Off Control> The control unit 13 can perform on / off control to switch the light source 11 between an on state and an off state. By sending a command to the light source 11 to turn it on, the control unit 13 can switch the light source 11 to a state in which continuous illumination light including infrared and visible light components is output.

[0039] On the other hand, the control unit 13 can switch to a state where continuous illumination light is not output from the light source 11 by sending a command to the light source 11 to turn it off.

[0040] <Stop position control> As explained in Figure 2 above, the control unit 13 can perform stop position control of the optical chopper 12 so as to stop the chopper plate 12b at a position where the continuous irradiation light output from the light source 11 passes through.

[0041] For example, if a pulse motor capable of positional control in response to an external command is used as the motor for rotating the optical chopper 12, the control unit 13 can perform positional control of the pulse motor by issuing a command to stop the chopper plate 12b at a position through which continuous irradiation light passes.

[0042] As a result, the flame detector test device 10 can be easily aimed at the flame detector 100 using continuous illumination light containing a visible light component. In particular, even if the distance from the flame detector test device 10 to the flame detector 100 is large in front of the flame detector 100, aiming can be easily performed by using continuous illumination light containing a visible light component.

[0043] <Chopping control> The control unit 13 can perform a chopping operation by rotating the optical chopper 12 so as to repeatedly pass / block the continuous irradiation light output from the light source 11 at a chopping frequency corresponding to the flickering frequency of a flame.

[0044] For example, if a pulse motor capable of rotating at a desired speed in response to an external command is used as the motor to rotate the optical chopper 12, the control unit 13 can perform the chopping operation by rotating the pulse motor according to a rotation command at the desired speed.

[0045] Furthermore, the control unit 13 can implement a mode switching function 13a that allows selection between "on / off control," "stop position control," and "chopping control" as described above. The control contents of the "on / off mode" and "flashing mode" in the mode switching function 13a that the control unit 13 can selectively execute are summarized as follows.

[0046] <Lighting Modes> The control unit 13 performs on / off control to turn on the light source 11 and also performs stop position control to stop the light chopper 12 at a position where the continuous irradiation light output from the light source 11 passes through. Based on the combination of "on / off control" and "stop position control," the control unit 13 can execute a lighting mode that generates lighting light including a visible light component.

[0047] <Flashing Mode> The control unit 13 performs on / off control to turn on the light source 11 and chopping control to cause the optical chopper 12 to perform a chopping operation. Based on the combination of "on / off control" and "chopping control," the control unit 13 can execute a blinking mode that generates blinking light including infrared light components.

[0048] Next, specific application examples and effects of the flame detector testing device 10 according to this embodiment 1, which is equipped with a mode switching function 13a, will be described based on a comparison with a conventional flame detector testing device.

[0049] Figure 3 is an explanatory diagram illustrating the process of conducting an operational test of a flame detector 100 using a conventional flame detector testing device 210. The flame detector 100, which is the subject of the operational test, consists of a detector body 101 and a mounting base 102. The mounting base 102 is attached to the installation surface 1. The detector body 101 is mounted so as to be rotatable relative to the mounting base 102 and its angle is adjusted so as to face the desired monitoring area.

[0050] When a tester uses a conventional flame detector testing device 210, such as the one disclosed in Non-Patent Literature 1, to perform an operational test on a flame detector 100 installed at a high location, it was necessary to attach the flame detector testing device 210 to one end of a support rod 220, as shown in Figure 3, and then, while gripping the other end of the support rod 220, position the flame detector testing device 210 so that it was within 20 cm of the front of the flame detector 100.

[0051] In contrast, Figure 4 is an explanatory diagram illustrating the case in which an operational test of a flame detector 100 is performed using the flame detector testing apparatus 10 according to Embodiment 1 of this disclosure. The flame detector 100 to be tested is the same as that shown in Figure 3. However, Figure 4 illustrates the case in which the flame detector 100 to be tested is installed at a high position on the installation surface 1, which is a wall.

[0052] The flame detector testing device 10 according to this embodiment 1 can be installed on the ground using a tripod 20, and the tester can perform the operation test from the ground without using a support rod 220. Alternatively, the tester can perform the operation test while holding the flame detector testing device 10 without using the tripod 20.

[0053] Conventional flame detector testing devices 210 did not have a function to illuminate with visible light. In contrast, the flame detector testing device 10 according to this embodiment 1 is equipped with a mode switching function 13a, which allows for continuous illumination of light containing a visible light component in a desired direction D1.

[0054] Therefore, when aiming at a flame detector 100 installed at a relatively long distance, the tester can use the steady light that can be generated using the mode switching function 13a, improving work efficiency and making it easier to aim and find the desired direction D1 compared to the conventional flame detector testing device 210, which can only use flashing light.

[0055] Furthermore, when the tester conducts an operational test of the flame detector 100, they can use the mode switching function 13a to perform aiming in the lighting mode, and then immediately perform the operational test in the flashing mode.

[0056] Conventional flame detector testing devices 210 employ an electrical flashing method, as described above, which uses an internal electrical circuit to flash a krypton bulb. In contrast, the flame detector testing device 10 according to this embodiment 1 employs a mechanical flashing method that generates flashing light by performing a chopping operation with an optical chopper on a continuously lit light source. Hereinafter, this mechanical flashing method will be referred to as the chopper method.

[0057] In the flame detector testing device 10 according to this embodiment 1, a chopper method is employed to generate flashing light suitable for operational testing of flame detectors 100 installed at a relatively long distance. The advantages of the chopper method will be explained with reference to the drawings.

[0058] Figure 5 is an explanatory diagram illustrating the advantages of the chopper method used to generate flashing light in the flame detector testing apparatus 10 according to Embodiment 1 of this disclosure. Figure 5(A) is an explanatory diagram illustrating the time change of the amount of light received by the flame detector 100 when the flame detector testing apparatus 210 and the flame detector 100 are in the positional relationship shown in Figure 3, when an electrical flashing method using a conventional flame detector testing apparatus 210 is employed.

[0059] On the other hand, Figure 5(B) is an explanatory diagram showing the time change in the amount of light received by the flame detector 100 when the chopper method, which is a mechanical flashing method, is adopted by the flame detector testing device 10 according to this embodiment 1, and the flame detector testing device 10 and the flame detector 100 are in the positional relationship shown in Figure 4.

[0060] As shown in Figure 5(A), when an electrical flashing method is used to perform flashing operation equivalent to 4kHz, even when the light is electrically turned off, the light source does not cool down completely, so the amount of received light does not drop to zero. As a result, when an electrical flashing method is used, the difference in brightness of the received light in the flashing state including the infrared light component is ΔL0.

[0061] Even with such a difference in brightness ΔL0, as shown in Figure 3 above, it was possible to conduct the operational test if the conventional flame detector test device 210 could be placed within 20 cm in front of the flame detector 100.

[0062] However, when this type of electrical flashing method is applied when the relative positions of the flame detector test device 10 and the flame detector 100 are relatively far apart, as shown in Figure 4, the amount of light received by the flame detector 100 decreases to ΔL1 as the distance from the light source increases, resulting in a difference in brightness as shown in Figure 5(B).

[0063] On the other hand, the chopper method according to this embodiment 1 can mechanically generate a blinking state, so when continuous irradiation light containing infrared light components does not pass through the optical chopper 12, it is possible to reduce the amount of received light to 0.

[0064] Furthermore, in the chopper system according to this embodiment 1, since the light source 11 is always lit, when continuous irradiation light passes through the light chopper 12, the amount of light received by the flame detector 100 can be increased compared to the conventional electrical flashing system.

[0065] As a result, even when the distance from the light source increases, the amount of light received by the flame detector 100 can obtain a difference in brightness of ΔL2, as shown in Figure 5(B), which is larger than ΔL1.

[0066] In other words, the flame detector testing device according to this embodiment 1 is technically characterized by having a mode switching function 13a that can generate flashing light with a larger difference in brightness from continuous illumination light using a chopper method, and can generate steady light usable for aiming from continuous illumination light by controlling the stopping position of the light chopper.

[0067] As a result, when conducting operational tests of flame detectors installed at a distance, aiming can be made easier, and operational tests can be performed from the ground or other locations without the need for support rods, by utilizing flashing light with a larger difference in brightness than conventional electrical flashing methods. In other words, by using flashing light with a chopper method, the operating distance can be significantly increased from the conventional 20 cm.

[0068] Furthermore, the flame detector testing apparatus according to this disclosure is not limited to the configuration shown in Figure 1, which includes a light source 11, an optical chopper 12, and a control unit 13. It is also possible to add a light source that outputs a continuous illumination light visible in the same axis direction as the test light to a conventional flame detector testing apparatus. In this case, even if the distance between the conventional flame detector testing apparatus 210 and the flame detector 100 is within the operating distance of 20 cm, accurate positioning becomes possible using the visible continuous illumination light.

[0069] In particular, the difference in brightness ΔL between flashing light decreases with increasing distance. Therefore, even if the distance between the conventional flame detector test device 210 and the flame detector 100 is within 20 cm, if the flame detector test device 210 is held in the hand and tilted even slightly, the amount of test light that the flame detector 100 can receive will decrease. Consequently, even when a light source capable of emitting a visible continuous light is added to the conventional flame detector test device 210, the effect of achieving stable operational test accuracy can be obtained.

[0070] In contrast, the conventional flame detector testing device 210 does not have a function to emit a light containing a visible light component. Therefore, the testers positioned the flame detector testing device 210 using a support rod 220 so that it was within 20 cm of the front of the flame detector 100, without using a light containing a visible light component.

[0071] Therefore, if a light source capable of emitting visible continuous light is added to the conventional flame detector testing device 210, it is expected that the positioning of the flame detector testing device 210 relative to the flame detector 100 will be made easier by utilizing the visible continuous light when performing operational tests using a support rod.

[0072] Next, the specific arrangement of the optical chopper 12 will be explained using the drawings. Figure 6 is an explanatory diagram of the arrangement of the optical chopper 12 used in the flame detector testing apparatus 10 according to Embodiment 1 of this disclosure.

[0073] Figure 6(A) shows, as arrangement example 1, a configuration in which the optical chopper 12 is placed between the reflector 14 and the flame detector 100 so that the light reflected by the reflector 14 is chopped by the optical chopper 12.

[0074] On the other hand, Figure 6(B) shows, as arrangement example 2, a configuration in which the optical chopper 12 is placed between the light source 11 and the reflecting mirror 14 so that the light is chopped by the optical chopper 12 before it is reflected by the reflecting mirror 14.

[0075] As shown in Figures 6(A) and 6(B), the continuous illumination light, including infrared and visible light components, output from the light source 11 enters the reflector 14 as incident light spread along the incident direction Din. However, by reflecting it with the concave reflector 14, it can be converted into parallel light directed towards the flame detector 100 in the exit direction Dout. In Figures 6(A) and 6(B), the incident direction Din is shown as a dotted line, and the exit direction Dout is shown as a dashed line.

[0076] However, if arrangement example 2 is adopted, the incident direction Din is set to a different direction that does not overlap with the exit direction Dout, allowing the chopping operation to be performed on the incident light to the reflector 14 in a location with less light spread. For this reason, adopting arrangement example 2 has the advantage of allowing the size of the optical chopper 12 to be made smaller compared to arrangement example 1.

[0077] In other words, by receiving the continuous irradiation light output from the light source 11 as incident light along the incident direction Din, and arranging the reflector 14 to reflect the incident light as parallel light directed toward the exit direction Dout, which is in a different direction from the incident direction Din, and then arranging the optical chopper 12 between the light source 11 and the reflector 14 so that a chopping operation can be performed on the light along the incident direction Din, the size of the device can be reduced.

[0078] As described above, according to Embodiment 1, by executing a mode switching function using a control unit that comprehensively controls the light source and the optical chopper, it is possible to select and generate a steady light and a flashing light using a mechanical flashing method from a continuous irradiation light containing infrared and visible light components, and irradiate the flame detector, which is the subject of the operational test, at a desired timing.

[0079] As a result, even when flame detectors are installed at a distance, aiming becomes easier by using a steady light, and by using a flashing light with a large difference in brightness, it is possible to irradiate the flame detector with test light suitable for operational testing.

[0080] Furthermore, by using a reflector to convert the continuous illumination light output from the light source into parallel light, and by placing an optical chopper between the light source and the reflector, and adopting a configuration in which the blinking light mechanically generated by the chopping operation is used as incident light for the reflector, it is possible to reduce the size of the device.

[0081] In the flame detector test apparatus according to Embodiment 1 described above, the flashing light generated by the mode switching function can be applied to infrared spot-type detectors. However, in order to conduct operational tests on ultraviolet spot-type detectors, it is advisable to also include a light source that emits ultraviolet light.

[0082] In other words, even when conducting operational tests of ultraviolet spot-type detectors installed at a distance, it becomes possible to perform operational tests from a distance by first using the illumination light containing a visible light component that can be generated by the mode switching function of this disclosure to perform aiming, and then emitting ultraviolet light.

[0083] Furthermore, the flame detector testing apparatus according to this disclosure is equipped with a function that can output a continuous illumination light visible in the same axis direction as the test light, thereby enabling stable operational test accuracy in various operational test environments, such as whether or not a support rod is used, or whether or not the flame detector is installed at a high location. [Explanation of Symbols]

[0084] 1 Mounting surface, 10 Flame detector test device, 11 Light source, 12 Optical chopper, 12a Rotating shaft, 12b Chopper plate, 13 Control unit, 13a Mode switching function, 14 Reflector, 20 Tripod, 100 Flame detector, 101 Detector body, 102 Mounting base, Din Incidence direction, Dout Output direction.

Claims

1. A flame detector testing apparatus for irradiating a flame detector with test light for performing an operational test of the flame detector, A light source capable of outputting continuous illumination light visible in the same axial direction as the aforementioned test light. A flame detector testing device equipped with a flame detector.

2. A light chopper generates a flashing light that turns on and off at a period corresponding to the chopping frequency by performing a chopping operation on the continuous irradiation light output from the light source, which repeatedly passes through and blocks the light at a chopping frequency corresponding to the flickering frequency of a flame. A control unit that provides overall control of the light source and the optical chopper. Furthermore, The light source outputs light containing infrared and visible light components as the continuous irradiation light. The control unit, A lighting mode is provided in which the light source is controlled to be in the ON state, and the light chopper is stopped at a position where the continuous irradiation light output from the light source is passed through, thereby generating a lit light. The light source is controlled to be on, and chopping control is performed to cause the optical chopper to perform the chopping operation, thereby generating the flashing light in a flashing mode. It has a selectable mode switching function. The flame detector testing apparatus according to claim 1.

3. The system further includes a reflector that receives the continuous irradiation light output from the light source as incident light along the incident direction, and reflects the incident light as parallel light directed toward the exit direction, which is a direction different from the incident direction, The optical chopper is positioned between the light source and the reflector so as to be able to perform the chopping operation with respect to light along the incident direction. The control unit, When the aforementioned lighting mode is selected, the illumination light obtained by executing the stop position control is generated as incident light for the reflector. When the flashing mode is selected, the flashing light obtained by executing the chopping control is generated as incident light for the reflector. The reflecting mirror reflects the incident light toward the direction of emission. The flame detector testing apparatus according to claim 2.

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