Hydrocarbon combustible gas sensor based on infrared energy level transition technology

Abstract

The utility model provides a hydrocarbon combustible gas sensor based on an infrared energy level transition technology, which is configured to be electrically connected to external gas detection equipment, and comprises a shell with a first gas inlet, and an infrared emission module, a combustion detection module and a signal processing module which are arranged in the shell, a first gas chamber is arranged in the shell, and hydrocarbon combustible gas can enter the first gas chamber through the first gas inlet; the infrared emission module is used for emitting infrared light which has a specified frequency and can be reflected through the shell into the first gas chamber; the combustion detection module is used for detecting the hydrocarbon combustible gas which absorbs the infrared light in the first gas chamber; and the signal processing module is used for processing and outputting a detection result. According to the hydrocarbon combustible gas sensor, the problems of low sensitivity and low detection precision caused by large volume or easy zero drift of the conventional hydrocarbon combustible gas sensor can be solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of hydrocarbon combustible gas sensors, and more specifically, relates to a hydrocarbon combustible gas sensor based on infrared energy level transition technology. Background Technology

[0002] A combustible gas sensor is a sensor used to detect the concentration of common combustible gases such as hydrocarbons in the air. It can quickly, accurately, and reliably detect combustible gases in the air and issue an alarm when the gas concentration exceeds a certain threshold, usually through audible and visual alarms or electrical signal output. Its working principle is based on chemical reaction principles. Common types include infrared optical and catalytic types. Infrared optical sensors measure gas concentration by detecting the absorption of infrared light of a specific wavelength by the combustible gas. Catalytic sensors utilize the change in resistance of a heated refractory platinum wire to determine the combustible gas concentration. When combustible gas enters the detector, it causes an oxidation reaction on the platinum wire surface, generating heat that raises the wire temperature, resulting in a change in resistivity.

[0003] However, infrared optical sensors require long gas chambers to achieve high-precision gas detection due to the low signal strength of hydrocarbon combustible gases, resulting in large size and low sensitivity. Catalytic sensors, on the other hand, are susceptible to zero-point drift caused by changes in air conductivity, leading to low detection accuracy. Therefore, to overcome these problems, this application proposes a hydrocarbon combustible gas sensor based on infrared energy level transition technology, based on the common principle that hydrocarbon combustible gases can absorb infrared light and undergo energy level transitions. Utility Model Content

[0004] The purpose of this invention is to solve the problems of low sensitivity and low detection accuracy of existing hydrocarbon combustible gas sensors due to their large size or the tendency for their zero point to drift.

[0005] To achieve the above objectives, this utility model provides a hydrocarbon combustible gas sensor based on infrared energy level transition technology, which is configured to be electrically connected to an external gas detection device; the hydrocarbon combustible gas sensor includes a housing with a first air inlet and an infrared emitting module, a combustion detection module and a signal processing module disposed within the housing;

[0006] The housing has a first gas chamber, through which hydrocarbon combustible gas can enter the first gas chamber through the first air inlet.

[0007] The infrared emitting module is used to emit infrared light of a specified frequency into the first air chamber, which can be reflected by the shell.

[0008] The combustion detection module is used to detect the hydrocarbon combustible gas in the first gas chamber after absorbing the infrared light.

[0009] The signal processing module is used to process the detection results and output them to the external gas detection device.

[0010] Optionally, the specified frequency range is 1 to 3 Hz.

[0011] Alternatively, a perforated plate for reflecting the infrared light may be installed at the first air inlet.

[0012] Alternatively, the perforated plate may be a layered structure made of stainless steel.

[0013] Optionally, a through hole is provided at the lower end of the first air chamber, through which the infrared light can enter the first air chamber.

[0014] Optionally, the combustion detection module has a second air inlet and a second gas chamber, through which the hydrocarbon combustible gas can enter the second gas chamber.

[0015] Optionally, the housing may contain a first circuit board for carrying the infrared emitting module and the combustion detection module.

[0016] Optionally, a second circuit board for carrying the signal processing module is provided inside the housing.

[0017] Optionally, the lower end of the signal processing module has an output pin for electrical connection with the external gas detection device.

[0018] Alternatively, the housing may be a cylindrical structure made of stainless steel.

[0019] The beneficial effects of this utility model are as follows:

[0020] This invention proposes a hydrocarbon combustible gas sensor based on infrared energy level transition technology. By incorporating an infrared emitting module and a combustion detection module within a housing having a first air inlet, the infrared emitting module emits infrared light of a specified frequency into the first gas chamber, which is reflected by the housing. The combustion detection module detects the hydrocarbon combustible gas within the first gas chamber after absorbing the infrared light. A signal processing module then processes the detection results and outputs them to an external gas detection device. Compared to existing hydrocarbon combustible gas sensors, in this invention, after an energy level transition, gas molecules in the hydrocarbon combustible gas undergo a transition from a low energy level to a high energy level and diffuse towards the combustion detection module. This ensures complete combustion of the hydrocarbon combustible gas entering the combustion detection module, thereby improving detection sensitivity. Furthermore, the absorption of infrared light modulated at a specified frequency by the hydrocarbon combustible gas modulates the signal output by the combustion detection module, thus improving the signal-to-noise ratio of the output signal. This invention enables the hydrocarbon combustible gas sensor to not only offset the zero-point drift of the combustion detection module itself, but also to reduce its size and achieve high-precision detection of low concentrations of hydrocarbon combustible gases, making it highly practical.

[0021] As can be seen from the above, this utility model can effectively solve the problems of low sensitivity and low detection accuracy caused by the large size of existing hydrocarbon combustible gas sensors or their tendency to drift at zero point.

[0022] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0023] This invention can be better understood by referring to the following description taken in conjunction with the accompanying drawings, in which the same or similar reference numerals are used throughout the drawings to denote the same or similar parts.

[0024] Figure 1 A cross-sectional view of a hydrocarbon combustible gas sensor based on infrared energy level transition technology according to an embodiment of the present invention is shown.

[0025] Figure 2 A schematic diagram of a hydrocarbon combustible gas sensor based on infrared energy level transition technology according to an embodiment of the present invention is shown.

[0026] Figure label:

[0027] 1-Shell;

[0028] 11 - First air intake;

[0029] 12-First air chamber;

[0030] 121 - Through hole;

[0031] 2-Infrared emitting module;

[0032] 3- Combustion detection module;

[0033] 31 - Second air intake;

[0034] 4-Signal processing module;

[0035] 41 - Output pin;

[0036] 5-Perforated panel;

[0037] 6-First circuit board;

[0038] 7-Second circuit board. Detailed Implementation

[0039] To enable those skilled in the art to more fully understand the technical solution of this utility model, exemplary embodiments of this utility model will be described more comprehensively and in detail below with reference to the accompanying drawings. Obviously, the one or more embodiments of this utility model described below are merely one or more specific ways to implement the technical solution of this utility model, and are not exhaustive. It should be understood that other ways belonging to a general inventive concept can be used to implement the technical solution of this utility model, and it should not be limited to the embodiments described exemplary. Based on one or more embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0040] Example: Figure 1 A cross-sectional view of a hydrocarbon combustible gas sensor based on infrared energy level transition technology according to an embodiment of the present invention is shown. Figure 2 A schematic diagram of a hydrocarbon combustible gas sensor based on infrared energy level transition technology according to an embodiment of the present invention is shown.

[0041] Reference Figure 1-2 The present invention provides a hydrocarbon combustible gas sensor based on infrared energy level transition technology, which is configured to be electrically connected to an external gas detection device; the hydrocarbon combustible gas sensor includes a housing 1 with a first air inlet 11 and an infrared emitting module 2, a combustion detection module 3 and a signal processing module 4 disposed in the housing 1;

[0042] The casing 1 has a first gas chamber 12, and hydrocarbon combustible gases can enter the first gas chamber 12 through the first air inlet 11;

[0043] The infrared emitting module 2 is used to emit infrared light of a specified frequency into the first air chamber 12, which can be reflected by the housing 1.

[0044] The combustion detection module 3 is used to detect hydrocarbon combustible gases that have absorbed infrared light in the first gas chamber 12;

[0045] Signal processing module 4 is used to process the detection results and output them to external gas detection equipment.

[0046] Specifically, hydrocarbon combustible gases refer to organic compounds containing CH chemical bonds, such as methane, ethane, and propane. When hydrocarbon combustible gas molecules absorb infrared light, they transition from low to high energy levels. These higher-energy-level molecules are more easily excited. Therefore, hydrocarbon combustible gases that have absorbed infrared light can be fully combusted when they enter the combustion detection module, thus improving detection sensitivity.

[0047] In one specific embodiment, the housing 1 is a cylindrical structure made of stainless steel. Due to its metallic properties, stainless steel typically has good electrical conductivity on its surface, which helps to reflect infrared light.

[0048] In one embodiment, a perforated plate 5 for reflecting infrared light is installed at the first air inlet 11. This allows hydrocarbon combustible gases to enter the first gas chamber while simultaneously increasing the absorption intensity of infrared light by reflecting it. It also reduces the likelihood of gas molecules diffusing out of the casing during collisions with infrared light, thereby increasing the concentration of hydrocarbon combustible gases entering the combustion detection module and ensuring detection sensitivity.

[0049] In one specific embodiment, the perforated plate 5 is a layered structure made of stainless steel.

[0050] Of course, it should be recognized that the shell and the perforated plate can also be made of other materials or structures. This utility model is not limited to these. Any material or structure that can achieve the same technical effect as this utility model is also within the protection scope of this utility model.

[0051] In one embodiment, a through hole 121 is provided at the lower end of the first air chamber 12, through which infrared light can enter the first air chamber 12.

[0052] In one specific embodiment, three infrared emitting modules 2 are provided inside the housing 1.

[0053] In one specific embodiment, the position of the through hole 121 is set to correspond one-to-one with the position of the three infrared emitting modules 2.

[0054] In one specific embodiment, the infrared emitting module 2 is an infrared emitter of model CSL0901S13T1. Its structure and working principle are existing technologies and will not be described in detail here.

[0055] In one embodiment, the specified frequency range is 1–3 Hz. After absorbing low-frequency modulated infrared light, the hydrocarbon combustible gas causes the signal output by the combustion detection module to also be low-frequency modulated. Since low-frequency modulation can change the frequency characteristics of the signal, it can effectively reduce the influence of noise, thereby improving the signal-to-noise ratio of the signal output by the combustion detection module. This counteracts the zero-point drift of the combustion detection module itself, achieving high-precision detection of low concentrations of hydrocarbon combustible gases.

[0056] In one embodiment, the combustion detection module 3 has a second air inlet 31 and a second gas chamber (not shown in the figure), through which hydrocarbon combustible gases can enter the second gas chamber.

[0057] In one specific embodiment, the combustion detection module 3 is a NAP-55S combustion detector. Its structure and working principle are existing technologies and will not be described in detail here.

[0058] In one specific embodiment, a first circuit board 6 for carrying the infrared emitting module 2 and the combustion detection module 3 is provided inside the housing 1.

[0059] In one specific embodiment, a second circuit board 7 for carrying the signal processing module 4 is provided inside the housing 1.

[0060] In one specific embodiment, the signal processing module 4 is a microprocessor chip of model STM32F030C8T6. Its structure and working principle are existing technologies and will not be described in detail here.

[0061] In one specific embodiment, the lower end of the signal processing module 4 has an output pin 41 for electrical connection with an external gas detection device.

[0062] Specifically, the external gas detection device has a display module to display the signals output by the hydrocarbon combustible gas sensor.

[0063] The working principle of this utility model of hydrocarbon combustible gas sensor is as follows: When hydrocarbon combustible gas enters the first gas chamber through the first air inlet and the perforated plate, the infrared emitting module emits infrared light into the first gas chamber through the through hole. The infrared light is reflected by the shell and the perforated plate. At this time, the hydrocarbon combustible gas absorbs the infrared light. During this process, the gas molecules collide with the infrared light and diffuse towards the second air inlet, and then enter the second gas chamber. Then, the combustion detection module fully combusts the hydrocarbon combustible gas in the second gas chamber and outputs the corresponding signal. Finally, the signal processing module processes the signal and outputs it to the external gas detection device.

[0064] The hydrocarbon combustible gas sensor proposed in this invention, based on infrared energy level transition technology, incorporates an infrared emitting module and a combustion detection module within a housing having a first air inlet. This allows the infrared emitting module to emit infrared light of a specified frequency into the first gas chamber, which can be reflected by the housing. The combustion detection module can detect the hydrocarbon combustible gas in the first gas chamber after absorbing the infrared light. The detection results are then processed by a signal processing module and output to an external gas detection device.

[0065] Therefore, compared with existing hydrocarbon combustible gas sensors, the hydrocarbon combustible gas in this invention undergoes energy level transitions, with gas molecules jumping from low to high energy levels and diffusing into the combustion detection module during this process. This ensures complete combustion of the hydrocarbon combustible gas entering the combustion detection module, thereby improving detection sensitivity. Furthermore, after the hydrocarbon combustible gas absorbs infrared light modulated at a specified frequency, the signal output by the combustion detection module is also modulated, thus improving the signal-to-noise ratio of the output signal. This allows the hydrocarbon combustible gas sensor of this invention to not only compensate for the zero-point drift of the combustion detection module itself but also reduce its size, achieving high-precision detection of low concentrations of hydrocarbon combustible gases, making it highly practical.

[0066] While one or more embodiments of the present invention have been described above, those skilled in the art will recognize that the present invention can be implemented in any other form without departing from its spirit and scope. Therefore, the embodiments described above are illustrative and not restrictive, and many modifications and substitutions will be apparent to those skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A hydrocarbon combustible gas sensor based on infrared energy level transition technology, characterized in that, It is configured to be electrically connected to an external gas detection device; The hydrocarbon combustible gas sensor includes a housing with a first air inlet and an infrared emitting module, a combustion detection module and a signal processing module disposed within the housing; The housing has a first gas chamber, through which hydrocarbon combustible gas can enter the first gas chamber through the first air inlet. The infrared emitting module is used to emit infrared light of a specified frequency into the first air chamber, which can be reflected by the shell. The combustion detection module is used to detect the hydrocarbon combustible gas in the first gas chamber after absorbing the infrared light. The signal processing module is used to process the detection results and output them to the external gas detection device.

2. The hydrocarbon combustible gas sensor based on infrared energy level transition technology according to claim 1, characterized in that, The specified frequency range is 1 to 3 Hz.

3. The hydrocarbon combustible gas sensor based on infrared energy level transition technology according to claim 1, characterized in that, A perforated plate for reflecting the infrared light is installed at the first air inlet.

4. The hydrocarbon combustible gas sensor based on infrared energy level transition technology according to claim 3, characterized in that, The perforated plate is a layered structure made of stainless steel.

5. The hydrocarbon combustible gas sensor based on infrared energy level transition technology according to claim 1, characterized in that, The lower end of the first air chamber is provided with a through hole, through which the infrared light can enter the first air chamber.

6. The hydrocarbon combustible gas sensor based on infrared energy level transition technology according to claim 1, characterized in that, The combustion detection module has a second air inlet and a second gas chamber, through which the hydrocarbon combustible gas can enter the second gas chamber.

7. The hydrocarbon combustible gas sensor based on infrared energy level transition technology according to claim 1, characterized in that, The housing contains a first circuit board for supporting the infrared emitting module and the combustion detection module.

8. The hydrocarbon combustible gas sensor based on infrared energy level transition technology according to claim 7, characterized in that, The housing contains a second circuit board for carrying the signal processing module.

9. The hydrocarbon combustible gas sensor based on infrared energy level transition technology according to claim 1, characterized in that, The lower end of the signal processing module has an output pin for electrical connection with the external gas detection device.

10. The hydrocarbon combustible gas sensor based on infrared energy level transition technology according to claim 1, characterized in that, The shell is a cylindrical structure made of stainless steel.

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