Flame detection device with self-checking alarm function

Abstract

This invention provides a flame detection device with self-checking and alarm functions, including a controller, a power module, a first power circuit, a second power circuit, an ultraviolet phototube, an ultraviolet lamp, a signal sampling circuit, and an alarm module. The flame detection device of this invention features a fault self-checking circuit. Through a microcontroller, the high-voltage generating module and the ultraviolet self-checking lamp operate independently or in tandem, performing fault self-checks periodically or under the control of a host computer. The alarm module provides real-time feedback, prompting the user to replace or repair the device, thus preventing significant losses due to detector failure, false alarms, or missed alarms caused by material fragility, performance degradation, or other factors.

Description

Technical Field

[0001] This utility model relates to the field of flame detector technology, and more specifically to a flame detection device with self-testing alarm function. Background Technology

[0002] Ultraviolet (UV) flame detection is a non-contact detection technology based on the ultraviolet radiation characteristics of flames. It primarily targets the characteristic spectral response of flames in the 185–260 nm (solar blind zone) and 280–400 nm wavelength bands. Current UV flame detection methods mainly determine the presence of a fire by detecting the ultraviolet light within the flame. Specifically, this involves using ultraviolet detectors (such as photomultiplier tubes or semiconductor UV phototubes). During operation, the UV phototube continuously monitors the ultraviolet radiation within the area, converting it into an electrical signal. This signal processing, including pulse counting, and decision analysis, determines the presence of a flame. It is mainly used for fire early warning in high-risk scenarios such as petrochemical, power, and aerospace industries.

[0003] Existing technologies have developed numerous detector tube types and modules for flame detection. The key detection component is the ultraviolet phototube. Because ultraviolet phototubes are made of glass (encapsulated in borosilicate glass), they are inherently fragile and easily damaged. Sudden temperature changes causing differences in expansion between the inner and outer layers, leading to stress exceeding the fracture strength, can cause the glass to crack, resulting in vacuum leakage or electrode short circuits. Furthermore, the typical design life of a phototube is around 10,000 hours. The cathode material (such as Cs-Te) of the ultraviolet phototube experiences sputtering loss under long-term electron bombardment, increasing the work function and reducing sensitivity. The typical end-of-life indicator is when the dark current exceeds the threshold, and the cathode quantum efficiency decays exponentially over time. When it reaches the end of its life or fails, it can easily lead to false alarms or missed fire alarms. Utility Model Content

[0004] The purpose of this utility model is to provide a flame detection device with a self-testing alarm function, so as to facilitate maintenance or prompt users to replace or improve it in a timely manner.

[0005] According to a first aspect of the present invention, a flame detection device with self-testing alarm function is proposed, comprising a controller, a power module, a first power circuit, a second power circuit, an ultraviolet phototube, an ultraviolet lamp, a signal sampling circuit, and an alarm module.

[0006] The power module is used to supply power to the first power circuit, the second power circuit, the controller, the interface module, and the alarm module.

[0007] The first power supply circuit, the second power supply circuit, and the alarm module are respectively connected to the controller and their operation is controlled by the controller through a switch.

[0008] The first power supply circuit is electrically connected to the ultraviolet phototube, and generates a high voltage to drive the ultraviolet phototube when it is controlled by the controller and applies it to the ultraviolet phototube.

[0009] The second power supply circuit is electrically connected to the ultraviolet lamp and generates a constant current output to drive the ultraviolet lamp when it is controlled by the controller; the ultraviolet lamp is located near the ultraviolet phototube so that it can irradiate the ultraviolet phototube when emitting ultraviolet light;

[0010] The output terminal of the ultraviolet phototube is connected to the controller via the signal sampling circuit, and the response output signal of the ultraviolet phototube is collected by the signal sampling circuit and sent to the controller.

[0011] The controller receives the signal output from the signal sampling circuit, identifies it, and controls the alarm module to issue an alarm signal through a switch based on the identification result.

[0012] Therefore, on the one hand, the controller receives the output of the signal sampling circuit and performs signal processing on the received signal, such as using pulse counting in the prior art, and outputs the flame signal based on the signal processing. On the other hand, during the self-test process, the controller controls the individual or simultaneous operation of the first power supply circuit and the second power supply circuit to perform detector self-test. When an abnormality occurs, the controller activates the alarm module to start the alarm.

[0013] As an optional embodiment, the flame detection device with self-test alarm function also includes an interface module, wherein the power module is powered through the interface module.

[0014] As an optional embodiment, the flame detection device with self-testing alarm function also includes a signal output module and a host computer. The signal output module is connected between the controller and the interface module, and the host computer is connected to the interface module.

[0015] The host computer can communicate with the controller through the interface module and the signal output module. It can modify the controller's parameter configuration and send the flame signal recognized by the controller to the host computer through the signal transmission module and the interface module.

[0016] As an optional embodiment, the first power supply circuit is a high-voltage generating module adapted to the type of ultraviolet phototube used.

[0017] As an optional embodiment, the second power supply circuit is a constant current power supply drive module adapted to the type of ultraviolet lamp used.

[0018] As an optional embodiment, the alarm module includes an indicator light and / or a buzzer, which is connected to the controller and its operation is controlled by the controller via a switch.

[0019] As an optional embodiment, the flame detection device further includes an operation indicator light connected to the controller, and its operation is controlled by the controller via a switch.

[0020] As an optional embodiment, the signal output module uses a CH chip for interface conversion and is connected between the controller and the interface module.

[0021] As an optional embodiment, the controller is an Arm-based microcontroller (MCU).

[0022] As an optional embodiment, the controller is configured to control the individual or simultaneous operation of the first power supply circuit and the second power supply circuit to perform detector self-test.

[0023] As an optional embodiment, the controller is configured to control the operation of the first power circuit and the second power circuit according to a preset self-test cycle or according to the instructions of the host computer.

[0024] The flame detection device with self-testing and alarm function in the above-described embodiments of the present invention is designed with a fault self-testing circuit. The microcontroller operates the high-voltage generating module and the ultraviolet self-testing lamp individually or in tandem, and performs fault self-testing periodically or according to the control of the host computer. The alarm module provides real-time feedback to prompt the user to replace or repair the device, so as to avoid significant losses caused by detector failure, false alarms, or missed alarms due to factors such as material fragility and performance degradation.

[0025] It should be understood that all combinations of the foregoing concepts and the additional concepts described in more detail below may be considered part of the utility model subject matter of this disclosure, provided that such concepts do not contradict each other. Furthermore, all combinations of the claimed subject matter are considered part of the utility model subject matter of this disclosure.

[0026] The foregoing and other aspects, embodiments, and features of the present invention will be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as features and / or beneficial effects of exemplary embodiments, will become apparent from the following description or may be learned through practice of specific embodiments according to the teachings of the present invention. Attached Figure Description

[0027] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in the various figures may be denoted by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings.

[0028] Figure 1This is a schematic diagram of a flame detection device with self-testing alarm function according to an embodiment of the present invention.

[0029] Figure 2 This is a schematic diagram of the self-testing process of a flame detection device with self-testing alarm function according to an embodiment of the present utility model. Detailed Implementation

[0030] To better understand the technical content of this utility model, specific embodiments are provided below in conjunction with the accompanying drawings.

[0031] Various aspects of the present invention are described in this disclosure with reference to the accompanying drawings, which illustrate numerous illustrative embodiments. The embodiments disclosed herein are not necessarily intended to include all aspects of the present invention. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed herein are not limited to any particular implementation. Furthermore, some aspects of the present invention can be used alone or in any suitable combination with other aspects disclosed herein.

[0032] {Example 1}

[0033] Combination Figure 1 The flame detection device with self-testing alarm function shown in the embodiment includes a controller 100, a power module 110, a first power circuit 121, a second power circuit 122, an ultraviolet phototube 130, an ultraviolet lamp 140, a signal sampling circuit 150, a signal output module 160, an interface module 180, an alarm module 190, and a host computer 200.

[0034] The power module 110 is used to supply power to the first power circuit 121, the second power circuit 122, the controller 100, the interface module 180, and the alarm module 190.

[0035] The first power supply circuit 121, the second power supply circuit 122, and the alarm module 190 are respectively connected to the controller 100 and are controlled by the controller 100 through a switch.

[0036] The first power supply circuit 121 is electrically connected to the ultraviolet phototube 130, and generates a high voltage to drive the ultraviolet phototube 130 when it is controlled by the controller 100.

[0037] The second power supply circuit 122 serves as a UV lamp driving circuit, is electrically connected to the UV lamp 140, and generates a constant current output to drive the UV lamp 140 when it is controlled by the controller 100. The UV lamp 140 is located near the UV phototube 130 so that it can irradiate the UV phototube 130 when emitting UV light.

[0038] The output terminal of the ultraviolet phototube 130 is connected to the controller 100 via the signal sampling circuit 150. The response output signal of the ultraviolet phototube 130 is collected by the signal sampling circuit 150 and sent to the controller 100.

[0039] The output terminal of the ultraviolet phototube 130 is connected to the controller 100 via a signal sampling circuit, and the response output signal of the ultraviolet phototube is collected by the signal sampling circuit and sent to the controller 100.

[0040] The controller 100 receives the signal output from the signal sampling circuit, identifies it, and controls the alarm module to issue an alarm signal through a switch based on the identification result.

[0041] Therefore, on the one hand, the controller receives the output of the signal sampling circuit and performs signal processing on the received signal, such as using pulse counting in the prior art, and outputs the flame signal based on the signal processing. On the other hand, during the self-test process, the controller controls the individual or simultaneous operation of the first power supply circuit and the second power supply circuit to perform detector self-test. When an abnormality occurs, the controller activates the alarm module to start the alarm.

[0042] As an optional embodiment, the flame detection device with self-test alarm function also includes an interface module 180, wherein the power module 110 is powered through the interface module 180. For example, the interface module adopts a USB interface and communicates and supplies power through the USB interface, wherein the power supply voltage is 5VDC and is input to the power module.

[0043] As an optional embodiment, the flame detection device with self-testing alarm function also includes a signal output module 160 and a host computer 200. The signal output module 160 is connected between the controller 100 and the interface module 180, and the host computer 200 is connected to the interface module 180.

[0044] Therefore, the host computer 200 can communicate with the controller through the interface module and the signal output module. It can modify the controller's parameter configuration through the host computer, and can also send the flame signal recognized by the controller to the host computer through the signal transmission module and the interface module.

[0045] As an optional embodiment, the first power supply circuit 121 is a high-voltage generating module adapted to the type of ultraviolet phototube 130 used. The second power supply circuit 122 is a constant current power supply driving module adapted to the type of ultraviolet lamp 140 used.

[0046] As an optional embodiment, the alarm module 190 includes an indicator light 191 and / or a buzzer 192, is connected to the controller 100, and is controlled by the controller 100 to operate via a switch.

[0047] As an optional embodiment, the flame detection device also includes an operation indicator light 170, which is connected to the controller 100 and whose operation is controlled by the controller 100 via a switch.

[0048] As an optional embodiment, the aforementioned signal output module 160 uses a CH340 chip for interface conversion and is connected between the controller 100 and the interface module 180.

[0049] As an optional embodiment, the aforementioned controller 100 is an Arm-based microcontroller (MCU), such as the MM32G0001 series low-power MCU. On one hand, it uses a CH340 chip for interface conversion, communicating with the host computer 200 (microcontroller) via a USB interface. On the other hand, it controls the operation of the indicator light 170 / constant current power supply drive module / high voltage generation module / indicator light / buzzer via switches. The MCU receives and processes signals from the signal sampling circuit and transmits them to the host computer. The host computer instructs the MCU to operate the buzzer and fire alarm indicator light based on the flame signal.

[0050] As an optional embodiment, the aforementioned controller 100 is configured to control the individual or simultaneous operation of the first power supply circuit 121 and the second power supply circuit 122 to perform detector self-test.

[0051] As an optional embodiment, the aforementioned controller 100 is configured to control the operation of the first power supply circuit 121 and the second power supply circuit according to a preset self-test cycle or according to the instructions of the host computer 200.

[0052] In the embodiments of this utility model, it should be understood that the aforementioned ultraviolet lamp can be a commercially available ultraviolet lamp, the purpose of which is to emit ultraviolet light to irradiate the ultraviolet phototube for self-testing (photoelectric conversion effect in the ultraviolet band), and therefore it is equipped with a driving circuit as the second power supply circuit in this embodiment.

[0053] Meanwhile, commercially available models of the phototube can be used, which are equipped with a driving circuit (i.e., a high-voltage generating module) as the first power supply circuit in this embodiment.

[0054] {Example 2}

[0055] Combination Figure 1 , Figure 2 As shown in the figure, this embodiment further illustrates the design of a flame detection device with self-testing alarm function and its self-testing operation process.

[0056] like Figure 2 The self-test procedures shown are all performed under flameless conditions. The self-test procedure as an example is as follows:

[0057] (1) After the flame detection device is powered on, the high voltage output is not turned on first. At this time, it is determined whether there is a flame signal output: if there is, it is determined to be abnormal; if not, proceed to the next step - turn on the high voltage output, that is, the controller controls the first power circuit to run through the switch, driving the ultraviolet phototube to work (which can produce photoelectric conversion and output detection response signal under ultraviolet light irradiation).

[0058] (2) After turning on the high voltage, check if there is a flame signal output: if there is no signal output, proceed to the next step - turn on the ultraviolet self-test lamp; if there is a signal output, it is considered abnormal.

[0059] (3) After turning on the self-test light, determine whether there is a flame signal output: if there is, the self-test is passed; if not, it is considered abnormal.

[0060] During the self-test process described above, if any abnormality occurs at any stage, the controller will activate the indicator light and sound an alarm.

[0061] This enables the self-testing of flame detection devices based on ultraviolet detection.

[0062] In this embodiment, the self-test process described above can be set to be executed periodically by the MCU, or the self-test can be started by sending a command from the host computer.

[0063] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A flame detection device with self-testing alarm function, characterized in that, It includes a controller (100), a power module (110), a first power circuit (121), a second power circuit (122), an ultraviolet phototube (130), an ultraviolet lamp (140), a signal sampling circuit (150), and an alarm module (190). The power module (110) is used to supply power to the first power circuit (121), the second power circuit (122), the controller (100), the interface module (180), and the alarm module (190); The first power supply circuit (121), the second power supply circuit (122), and the alarm module (190) are respectively connected to the controller (100) and their operation is controlled by the controller (100) through a switch; The first power supply circuit (121) is electrically connected to the ultraviolet phototube (130) and generates a high voltage to drive the ultraviolet phototube (130) when it is controlled by the controller (100). The second power supply circuit (122) is electrically connected to the ultraviolet lamp (140) and generates a constant current output for driving the ultraviolet lamp (140) when it is controlled by the controller (100); the ultraviolet lamp (140) is close to the ultraviolet phototube (130) so that it can irradiate the ultraviolet phototube (130) when emitting ultraviolet light. The output terminal of the ultraviolet phototube (130) is connected to the controller (100) via the signal sampling circuit (150), and the response output signal of the ultraviolet phototube (130) is collected by the signal sampling circuit (150) and sent to the controller (100). The controller (100) receives the signal output from the signal sampling circuit (150), identifies it, and controls the alarm module (190) to issue an alarm signal according to the identification result through a switch.

2. The flame detection apparatus having a self-check alarm function according to claim 1, wherein It also includes an interface module (180), through which the power module (110) is powered. The interface module (180) uses a USB interface and communicates and supplies power through the USB interface.

3. The flame detection apparatus having a self-check alarm function according to claim 2, wherein It also includes a signal output module (160) and a host computer (200). The signal output module (160) is connected between the controller (100) and the interface module (180), and the host computer (200) is connected to the interface module (180).

4. The flame detection apparatus having a self-check alarm function according to claim 1, wherein The first power supply circuit (121) is a high voltage generating module adapted to the ultraviolet phototube (130) of the model used.

5. The flame detection apparatus having a self-check alarm function according to claim 1, wherein The second power supply circuit (122) is a constant current power supply drive module adapted to the ultraviolet lamp (140) of the model used.

6. The flame detection apparatus having a self-check alarm function according to claim 1, wherein The alarm module (190) includes an indicator light (191) and / or a buzzer (192), is connected to the controller (100), and is controlled by the controller (100) via a switch.

7. The flame detection apparatus having a self-check alarm function according to claim 1, wherein The flame detection device also includes an operation indicator light (170), which is connected to the controller (100) and its operation is controlled by the controller (100) through a switch.

8. The flame detection apparatus having a self-check alarm function according to claim 3, wherein The signal output module (160) uses a CH340 chip for interface conversion and is connected between the controller (100) and the interface module (180).

9. The flame detection apparatus having a self-check alarm function according to claim 1, wherein, The controller (100) is an Arm-based microcontroller (MCU).

10. The flame detection apparatus having a self-check alarm function according to claim 1, wherein, The controller (100) is configured to control the individual or simultaneous operation of the first power supply circuit (121) and the second power supply circuit (122) to perform detector self-test.

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