Flame detector on-site detection device and method

Abstract

The present invention discloses a flame detector on-site detection device and method. In the flame detector on-site detection device, the on-site detection device includes a shell, and a light-emitting component and a frequency control component arranged in the shell; the shell is provided with a window facing the working direction; the light-emitting component includes a light source, and the light source is used to emit light of a specific wavelength when the on-site detection device is working; the frequency control component is used to control the on-off of the light propagation path between the light source and the window according to a preset frequency. In the on-site detection device, the flame light simulated by the light-emitting component can be adjusted by the frequency control component to simulate the beating frequency of the flame, which is more in line with the actual law compared with the general flame simulation equipment. In addition, the on-site detection device has a simple structure, fewer components, is lighter, and is easy to carry.

Description

Technical Field

[0001] The present invention relates to the field of fire protection, and in particular to an on-site detection device and method for a flame detector. Background Art

[0002] In existing fire protection projects, the debugging and testing of flame detectors are mostly carried out using portable functional test devices, that is, using such test devices to simulate the red and ultraviolet spectrum of strong and weak interval frequencies emitted by flames, thereby triggering the flame detector alarm.

[0003] In the above technologies, the jitter of the flame is achieved through the control of the strobe drive circuit. Therefore, the light source in the functional test device will generate strong and weak temperature fields at this frequency. This temperature field can easily cause the attenuation of spectral energy during the emission process. Most of them are suitable for close-range flame simulation detection within 3m.

[0004] Taking into account that the on-site installation height of the flame detector may be nearly 10m, that is, the performance of the flame detector needs to be detected on-site at a high distance, a flame detector on-site detection device is specially designed for this purpose. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a flame detector on-site detection device and method.

[0006] The technical solution adopted by the present invention to solve the technical problem is: constructing a flame detector on-site detection device, the on-site detection device comprising a shell, and a light-emitting component and a frequency control component arranged in the shell;

[0007] The shell is provided with a window facing the working direction;

[0008] The light emitting assembly includes a light source, and the light source is used to emit light of a specific wavelength when the on-site detection device is working;

[0009] The frequency control component is used to control the on / off of the light propagation path between the light source and the window according to a preset frequency.

[0010] Furthermore, in the flame detector on-site detection device constructed in the present invention, the light source includes an infrared light source and / or an ultraviolet light source, and the light corresponds to infrared light of infrared wavelength and / or ultraviolet light of ultraviolet wavelength.

[0011] Furthermore, in the flame detector on-site detection device constructed by the present invention, the light emitting assembly further includes a filter;

[0012] The light source includes a full-color light source, and the light corresponds to full-color light of full-spectrum wavelengths;

[0013] The filter is used to filter the full-color light into simulated light; the simulated light is emitted to the outside of the housing through the window according to the preset frequency;

[0014] The optical filter is arranged between the light source and the frequency control component; or, the optical filter is arranged at the window and covers the window.

[0015] Furthermore, in the flame detector on-site detection device constructed by the present invention, the on-site detection device further includes a preheating component; the light source is a halogen lamp, and the light is white light;

[0016] The preheating component is used to detect the operating temperature of the light emitted by the light source, and to issue a preparatory indication of the completion of preheating after the operating temperature reaches a preset temperature.

[0017] Furthermore, in the flame detector on-site detection device constructed by the present invention, the light emitting assembly further comprises a condenser; the condenser is arranged on a side of the light source away from the window;

[0018] The condenser is used to change the propagation path of the light emitted by the light source so that the light is emitted out of the housing along a working direction.

[0019] Furthermore, in the flame detector field detection device constructed by the present invention, the frequency control assembly includes a light-proof frequency control piece and a motor for controlling the rotational movement of the frequency control piece;

[0020] The frequency control sheet is rotatably disposed inside the housing, and when the frequency control sheet is rotated to a preset angle, it completely blocks the light propagation path between the light source and the window.

[0021] Furthermore, in the flame detector field detection device constructed by the present invention, the field detection device further includes a control circuit;

[0022] The control circuit is connected to the frequency control component and the light emitting component;

[0023] The control circuit is used to control the motor to drive the frequency control piece to rotate according to the preset frequency.

[0024] Furthermore, in the flame detector on-site detection device constructed by the present invention, the frequency control piece includes two protrusions arranged opposite to each other, and a bearing cooperating with the protrusions is arranged inside the housing;

[0025] The protrusion includes a first protrusion and a second protrusion, the first protrusion is inserted into the bearing, and the second protrusion is connected to the rotating shaft of the motor;

[0026] The motor controls the frequency control piece to rotate around an axis formed by a line connecting the first protrusion and the second protrusion.

[0027] Further, in the flame detector on-site detection device constructed by the present invention, the on-site detection device further comprises at least one of a laser light, a handle and a power supply;

[0028] in,

[0029] The laser lamp is arranged on the surface of the housing, and is used to emit laser light in the working direction;

[0030] The handle is arranged on the surface of the shell along the working direction;

[0031] The power supply is connected to the light-emitting component and the frequency control component, and is used to provide electrical energy to the light-emitting component and the frequency control component.

[0032] The present invention also constructs a flame detector on-site detection method implemented based on any of the flame detector on-site detection devices described above, and the on-site detection method comprises the following steps:

[0033] Align the window on the field detection device with the flame detector to be detected so that the connection line between the field detection device and the flame detector is consistent with the working direction;

[0034] Turn on the light source;

[0035] Obtaining the alarm status of the flame detector, wherein the alarm status includes whether an alarm is triggered and a response time;

[0036] Determine whether the flame detector alarms, if not, determine that the flame detector is faulty and end the detection, if yes, execute the next step;

[0037] It is determined whether the reaction time for making an alarm exceeds a preset time. If so, it is determined that the flame detector is faulty and the detection is terminated.

[0038] By implementing the present invention, the following beneficial effects are achieved:

[0039] The present invention discloses a flame detector on-site detection device and method. In the flame detector on-site detection device, the on-site detection device includes a shell, and a light-emitting component and a frequency control component arranged in the shell; the shell is provided with a window facing the working direction; the light-emitting component includes a light source, and the light source is used to emit light of a specific wavelength when the on-site detection device is working; the frequency control component is used to control the on-off of the light propagation path between the light source and the window according to a preset frequency. In the on-site detection device, the flame light simulated by the light-emitting component can be adjusted by the frequency control component to simulate the beating frequency of the flame, which is more in line with the actual law compared with the general flame simulation equipment. In addition, the on-site detection device has a simple structure, fewer components, is lighter, and is easy to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0041] Figure 1 is a cross-sectional view of a flame detector on-site detection device in a first embodiment of the present invention;

[0042] Figure 2 It is a flow chart of the on-site detection method of the flame detector in the second embodiment of the present invention. DETAILED DESCRIPTION

[0043] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0044] It should be noted that the flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor do they have to be executed in the order described. For example, some operations / steps can be decomposed, while some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0045] The block diagrams shown in the accompanying drawings are only functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0046] See also Figure 1The first embodiment of the present invention discloses a flame detector field detection device, which includes a shell 1, and a light-emitting component 2 and a frequency control component 3 arranged in the shell 1; the shell 1 is provided with a window facing the working direction; the light-emitting component 2 includes a light source 21, and the light source 21 is used to emit light of a specific wavelength when the field detection device is working; the frequency control component 3 is used to control the on-off of the light propagation path between the light source 21 and the window according to a preset frequency.

[0047] When the flame detector is tested on site, a simulated fire source simulating a fire scene is needed to detect whether the flame detector can work normally. In some test sites where open flames cannot appear, a simulated fire source without open flames is needed. Based on the working principle of the flame detector, a light with a specific wavelength can be used as a simulated fire source to stimulate the flame alarm of the flame detector. For different types of flame detectors, the light with a specific wavelength emitted by the light source 21 can be set to infrared light, ultraviolet light, or a composite light mixed with infrared light and ultraviolet light.

[0048] When the housing 1 is a barrel-shaped housing, the working direction is parallel to the central axis of the barrel-shaped body. The light source 21 can be arranged on the central axis of the housing 1 .

[0049] Furthermore, in the flame detector on-site detection device disclosed in this embodiment, the window is covered with a transparent dust shield.

[0050] Furthermore, in the flame detector on-site detection device disclosed in the present embodiment, the light source 21 includes an infrared light source and / or an ultraviolet light source, and the light corresponds to an infrared light of an infrared wavelength and / or an ultraviolet light of an ultraviolet wavelength. When the light source 21 includes multiple types, in the face of the difference in types of flame detectors to be detected on site, the actual working light source 21 is selected according to the needs.

[0051] Furthermore, in the flame detector on-site detection device disclosed in this embodiment, the light-emitting component 2 also includes a filter 22; the light source 21 includes a full-color light source, and the light corresponds to full-color light of full-spectrum wavelength; the filter 22 is used to filter the full-color light into simulated light; the simulated light is emitted to the outside of the shell 1 through the window according to the preset frequency; the filter 22 is arranged between the light source 21 and the frequency control component 3; or, the filter 22 is arranged at the window and covers the window.

[0052] The filter 22 can be an absorption filter or an interference filter. In this embodiment, the filter 22 is made of silicon-based material, and is a light-transmitting thin sheet installed in the housing 1. The plane where the filter 22 is located is perpendicular to the working direction of the field detection device. The filter 22 can filter the spectrum outside the specified wavelength so that the light passing through the filter 22 meets the specified central wavelength. In some embodiments, the transmission center wavelength of the filter 22 is the infrared band of 4.3μm, and in other embodiments, the transmission center wavelength of the filter 22 is the full ultraviolet band.

[0053] Furthermore, in the flame detector field detection device disclosed in the present embodiment, the field detection device further includes a preheating component 5; the light source 21 is a halogen lamp, and the light is white light; the preheating component 5 is used to detect the working temperature of the light emitted by the light source 21, and to issue a preparatory indication of preheating completion after the working temperature reaches a preset temperature. After the halogen lamp is turned on, the field detection device starts preheating, and normal detection is started after the preheating reaches the preset temperature. After the halogen lamp reaches the preset temperature, the field detection device reaches the best use state and can stably emit full-spectrum light with stable power.

[0054] Furthermore, in the flame detector field detection device disclosed in the present embodiment, the light-emitting component 2 also includes a condenser 23; the condenser 23 is arranged on the side of the light source 21 away from the window; the condenser 23 is used to change the propagation path of the light emitted by the light source 21, so that the light is emitted out of the shell 1 along the working direction. The condenser 23 is a parabola, or a trumpet shape, and the concave side of the condenser 23 faces the light source 21. The condenser 23 is fixedly connected to the inner wall of the cavity of the shell 1 through an adapter or a buckle. The light source 21 is arranged on the central axis of the shell 1, and is arranged at the focus of the condenser 23, so that the light emitted by the light source 21 reaches the concave surface and then is emitted through the window along the working direction.

[0055] Furthermore, in some embodiments, the filter 22 covers the port on the concave surface of the condenser 23 .

[0056] Further, in some embodiments, the interior of the shell 1 can be divided into a working area and a backup area. The working area is arranged in the space of the shell 1 on the side close to the window along the working direction, and the backup area is arranged in the space of the shell 1 on the side away from the window along the working direction. The light-emitting component 2 and the frequency control component 3 are arranged in the working area, and the power supply 8 and the control circuit 4 are arranged in the backup area. The power supply 8 provides electrical energy for the light-emitting component 2, the frequency control component 3 and the control circuit 4. Preferably, the power supply 8 is arranged at the position of the on-site detection device farthest from the window along the working direction, and a charging socket and a charging indicator light are provided at the corresponding position of the shell 1 to facilitate charging of the power supply 8; or, a replacement opening is provided at the corresponding position of the shell 1 to facilitate replacement of the power supply 8.

[0057] By setting up a working area and a backup area separately, a quick response can be achieved in the maintenance and inspection of the on-site detection device itself, and it is convenient to replace related components, such as replacing the light source 21 or the filter 22 through the window at the front end of the working direction, and replacing the power supply 8 or repairing the control circuit 4 through another opening at the rear end of the working direction. When the light source 21 is a halogen lamp, it will emit heat when performing on-site detection work. By spatially separating the working area and the backup area, the control circuit 4 can be kept away from the heating light source 21, thereby avoiding the control circuit 4 from malfunctioning and errors, thereby increasing the working time; the power supply 8 can also be kept away from the heating light source 21, thereby avoiding the power supply 8 from overheating and failure, thereby increasing the battery life and improving safety. In some other embodiments, the working area and the backup area are separated by a condenser 23 as a boundary.

[0058] Furthermore, in the flame detector on-site detection device disclosed in this embodiment, the frequency control component 3 includes an opaque frequency control piece 31, and a motor 32 for controlling the rotational movement of the frequency control piece 31; the frequency control piece 31 is rotatably arranged inside the shell 1, and the frequency control piece 31 completely blocks the light propagation path between the light source 21 and the window when rotated to a preset angle.

[0059] In some embodiments, the frequency control piece 31 is formed of metal in one piece, and the surface is coated with a black coating. During the rotation process, it does not interfere with the filter 22 disposed in the housing 1. The size and shape of the frequency control piece 31 at least meet the requirements of being able to completely block the light emitted from the light-emitting component 2 to the window when it is rotated to a plane perpendicular to the working direction. In some other embodiments, the frequency control piece 31 can also completely block the light emitted from the light-emitting component 2 to the window when it is rotated to a plane that is not perpendicular to the working direction. The rotation process of the frequency control piece 31 simulates the flame jitter frequency, and the motor 32 can be a variable speed motor to simulate the randomness of the flame jitter frequency.

[0060] Furthermore, in the flame detector on-site detection device disclosed in this embodiment, the frequency control piece 31 includes two relatively arranged protrusions, and a bearing that cooperates with the protrusions is provided inside the shell 1; the protrusions include a first protrusion and a second protrusion, the first protrusion is inserted into the bearing, and the second protrusion is connected to the rotating shaft of the motor 32; the motor 32 controls the frequency control piece 31 to rotate around the axis formed by the line connecting the first protrusion and the second protrusion.

[0061] In some other embodiments, the filter 22 in the light-emitting component 2 is arranged at the port of the condenser 23, and the frequency control component 3 is placed at the front end of the filter 22. In these other embodiments, the frequency control component 3 is mainly composed of a frequency control piece 31, a motor 32, a bearing, a limit protrusion and a limit switch, and the motor 32 is a rotating motor. The frequency control piece 31 is integrally formed of a metal material, and the surface is covered with a black coating, and there is no interference with the filter 22 during the rotation (around the horizontal or vertical axis of the piece). The frequency control piece 31 can completely block the light when it is aligned with the filter 22 from the front, and the rotation process simulates the flame shaking frequency, and the upper and lower ends are respectively placed inside the cavity of the housing 1 through the rotating motor shaft and the bearing. The metal sheet-shaped shielding edge of the frequency control component 3 must be provided with a protrusion, which is matched with the limit switch notch in the main shell 1. The rotating motor is electrically connected to the control circuit 4. The control circuit 4 sets the rotation frequency of the rotating motor according to the actual flame jitter frequency. The rotating motor controls the frequency control sheet 31 to rotate to the frequency of the limit switch position, thereby adjusting the flickering frequency of the spectrum.

[0062] Furthermore, in the flame detector field detection device disclosed in this embodiment, the field detection device also includes a control circuit 4; the control circuit 4 is connected to the frequency control component 3 and the light-emitting component 2; the control circuit 4 is used to control the motor 32 to drive the frequency control piece 31 to rotate according to the preset frequency.

[0063] Furthermore, in the flame detector field detection device disclosed in this embodiment, the field detection device further includes a laser lamp 6, which is arranged on the surface of the housing 1 and is used to emit laser light in the working direction. The laser lamp 6 is used for positioning indication of the field detection device, and the laser emitted by the laser lamp 6 indicates the position where the light emitted by the field detection device is projected.

[0064] Further, in the flame detector field detection device disclosed in the present embodiment, the preheating component 5 includes a thermocouple and a preheating indicator light. The preheating indicator light is arranged on the outer surface of the main housing 1 to display the preheating state. The thermocouple is placed inside the condenser 23, or arranged on the outer wall of the condenser 23. The thermocouple collects the temperature value generated by the spectral energy emitted by the light source 21, and transmits the temperature value as the working temperature to the control circuit 4. The control circuit 4 determines whether the working temperature reaches the set preset temperature. If the collected temperature value does not reach the set preset temperature, the control circuit 4 indicates that the preheating is not completed through the control indicator light, and the preheating continues; if the collected temperature reaches the set preheating temperature, the control circuit 4 indicates that the preheating work is completed through the control indicator light, and at the same time, the frequency control piece 31 enters the rotating state to prompt the field detection device to perform online detection work. In order to enable the field detection device to be in the best state, before the preheating work is completed, the frequency control piece 31 in the frequency control component 3 completely blocks the light, and the laser light 6 is in the on state for pre-positioning.

[0065] Furthermore, in the flame detector field detection device disclosed in the present embodiment, the field detection device further includes a handle 7, and the handle 7 is arranged on the surface of the shell 1 along the working direction. In some other embodiments, a through hole is provided on the shell 1, and a hollow handle 7 is provided outside the shell 1 at a position corresponding to the through hole. The motor 32 is arranged in the hollow handle 7, so that the frequency control piece 31 can be completely arranged in the shell 1, and the opened window does not need to reserve a position for the motor 32. The motor 32 extends the rotating shaft in the handle 7 and is connected to the frequency control piece 31, so that the field detection device is smaller and more portable.

[0066] Furthermore, in the flame detector field detection device disclosed in this embodiment, the field detection device further includes a power supply 8, the power supply 8 is connected to the light emitting component 2 and the frequency control component 3, and the power supply 8 is used to provide power to the light emitting component 2 and the frequency control component 3. The power supply 8 is a lithium battery, which provides the working voltage of the entire field detection device, and can work simultaneously during the charging process.

[0067] In some embodiments, when the flame detector field detection device is used, the user can hold the handle 7 or set it up for use. When in use, the window is aligned with the flame detector to be detected, and the lithium battery in the field detection device supplies power to the light-emitting component 2, the control circuit 4 and the frequency control component 3. The preheating component 5 monitors the preheating of the field detection device. During the preheating process, the preheating indicator light is turned on and the laser light 6 is turned on to facilitate early positioning. After the preheating work is completed, the preheating indicator light is turned off and the detection can be started. The user interacts with the field detection device through the frequency control knob or selects the frequency control gear, and adjusts the frequency control piece 31 through the control circuit 4 to start periodic rotation from the limit switch according to the selected frequency. Observe the status of the detection indicator light and the buzzer set on the outer surface of the housing 1, and the status shows that the device is performing normal detection work. If the flame detector to be detected is observed to emit an audible and visual alarm signal within the specified preset time, the flame detector is recorded as being in a normal state; if the audible and visual alarm signal of the flame detector to be detected is still not observed after the specified time, the flame detector is recorded as being in an abnormal state. When the maximum detection time is reached, the warning light and buzzer will prompt the user to turn off the power switch of the on-site detection device. After a single detection is completed or the maximum detection time is reached, the switch can be turned on cyclically to perform the next cycle of flame detector performance detection.

[0068] The flame detector on-site detection device disclosed in this embodiment provides the required simulated detection light source for detecting flame detectors. When the flame detector is at a certain distance, the effective protection distance, protection field angle range, response time and other parameters of the red flame detector can be detected to achieve quantitative detection. The simulated light source structure part of the flame detector on-site detection device mainly completes the structural design of the detection light source, the laser indicating the light path, the filter, the infrared glass and other devices, converting the red / ultraviolet light generated by the detection light source into the specified band light that can be detected by the flame detector being detected; the design of the filter and the laser lamp can ensure the effectiveness of the light detection and alignment, and control the flame jitter frequency through the frequency control component to reduce the energy attenuation of the light source, so as to achieve online detection of the performance status of the flame detector.

[0069] See also Figure 2 The second embodiment of the present invention discloses a flame detector on-site detection method, which is implemented based on the flame detector on-site detection device described in any one of the first embodiments, and the on-site detection method comprises the following steps:

[0070] S1. Align the window on the field detection device with the flame detector to be detected so that the connection line between the field detection device and the flame detector is consistent with the working direction.

[0071] S2. Turn on the light source.

[0072] S3. Obtain the alarm status of the flame detector, where the alarm status includes whether an alarm is triggered and the response time.

[0073] S4, determine whether the flame detector alarms, if not, determine that the flame detector is faulty and end the detection, if so, execute the next step S5.

[0074] S5. Determine whether the response time for making an alarm exceeds a preset time. If so, determine that the flame detector is faulty and end the detection.

[0075] Furthermore, in the flame detector on-site detection method disclosed in this embodiment, after turning on the light source in step S2, the method further includes: waiting for the light source to be turned on for a period of time, determining that the temperature of the light source reaches a set temperature, and then executing the next step S3.

[0076] Furthermore, in the on-site detection method of the flame detector disclosed in this embodiment, the following steps are also included: obtaining the duration of the on-site detection device turning on the light source, determining whether the duration is greater than the preset working time, and if so, issuing a working timeout alarm. In some embodiments, the preset working time is 2.5 hours.

[0077] By implementing the present invention, the following beneficial effects are achieved:

[0078] The present invention discloses a flame detector on-site detection device and method. In the flame detector on-site detection device, the on-site detection device includes a shell, and a light-emitting component and a frequency control component arranged in the shell; the shell is provided with a window facing the working direction; the light-emitting component includes a light source, and the light source is used to emit light of a specific wavelength when the on-site detection device is working; the frequency control component is used to control the on-off of the light propagation path between the light source and the window according to a preset frequency. In the on-site detection device, the flame light simulated by the light-emitting component can be adjusted by the frequency control component to simulate the beating frequency of the flame, which is more in line with the actual law compared with the general flame simulation equipment. In addition, the on-site detection device has a simple structure, fewer components, is lighter, and is easy to carry.

[0079] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the present invention, the above embodiments or technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the present invention, that is, the embodiments described in "some embodiments" can be freely combined with any of the above and below embodiments. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A flame detector on-site detection device, characterized in that: The on-site detection device comprises a housing, and a light-emitting component and a frequency control component arranged in the housing; The shell is provided with a window facing the working direction; The light emitting assembly includes a light source, and the light source is used to emit light of a specific wavelength when the on-site detection device is working; The frequency control component is used to control the on / off of the light propagation path between the light source and the window according to a preset frequency.

2. The flame detector on-site detection device according to claim 1, characterized in that: The light source includes an infrared light source and / or an ultraviolet light source, and the light corresponds to infrared light with an infrared wavelength and / or ultraviolet light with an ultraviolet wavelength.

3. The flame detector on-site detection device according to claim 1, characterized in that: The light emitting component also includes a filter; The light source includes a full-color light source, and the light corresponds to full-color light of full-spectrum wavelengths; The filter is used to filter the full-color light into simulated light; the simulated light is emitted to the outside of the housing through the window according to the preset frequency; The optical filter is arranged between the light source and the frequency control component; or, the optical filter is arranged at the window and covers the window.

4. The flame detector on-site detection device according to claim 3, characterized in that: The on-site detection device also includes a preheating component; the light source is a halogen lamp, and the light is white light; The preheating component is used to detect the operating temperature of the light emitted by the light source, and to issue a preparatory indication of the completion of preheating after the operating temperature reaches a preset temperature.

5. The flame detector on-site detection device according to any one of claims 2 to 4, characterized in that: The light emitting assembly further comprises a condenser; the condenser is arranged on a side of the light source away from the window; The condenser is used to change the propagation path of the light emitted by the light source so that the light is emitted out of the housing along a working direction.

6. The flame detector on-site detection device according to claim 1, characterized in that: The frequency control assembly includes a light-proof frequency control sheet and a motor for controlling the rotational movement of the frequency control sheet; The frequency control sheet is rotatably disposed inside the housing, and when the frequency control sheet is rotated to a preset angle, it completely blocks the light propagation path between the light source and the window.

7. The flame detector on-site detection device according to claim 6, characterized in that: The on-site detection device also includes a control circuit; The control circuit is connected to the frequency control component and the light emitting component; The control circuit is used to control the motor to drive the frequency control piece to rotate according to the preset frequency.

8. The flame detector on-site detection device according to claim 6, characterized in that: The frequency control sheet includes two protrusions arranged opposite to each other, and a bearing matched with the protrusions is arranged inside the housing; The protrusion includes a first protrusion and a second protrusion, the first protrusion is inserted into the bearing, and the second protrusion is connected to the rotating shaft of the motor; The motor controls the frequency control piece to rotate around an axis formed by a line connecting the first protrusion and the second protrusion.

9. The flame detector on-site detection device according to claim 1, characterized in that: The on-site detection device further includes at least one of a laser light, a handle, and a power supply; in, The laser lamp is arranged on the surface of the housing, and is used to emit laser light in the working direction; The handle is arranged on the surface of the shell along the working direction; The power supply is connected to the light-emitting component and the frequency control component, and is used to provide electrical energy to the light-emitting component and the frequency control component.

10. A flame detector on-site detection method, implemented based on the flame detector on-site detection device according to any one of claims 1 to 9, characterized in that: The on-site detection method comprises the following steps: Align the window on the field detection device with the flame detector to be detected so that the connection line between the field detection device and the flame detector is consistent with the working direction; Turn on the light source; Obtaining the alarm status of the flame detector, wherein the alarm status includes whether an alarm is triggered and a response time; Determine whether the flame detector alarms, if not, determine that the flame detector is faulty and end the detection, if yes, execute the next step; It is determined whether the reaction time for making an alarm exceeds a preset time. If so, it is determined that the flame detector is faulty and the detection is terminated.

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