Gas detection device

Abstract

The utility model relates to a gas detection device which comprises a light-emitting part, a calibration gas chamber, a detection gas chamber, a photoelectric detection assembly and a wavelength calibration assembly capable of adjusting the wavelength of light emitted by the light-emitting part, and the photoelectric detection assembly comprises a first detection part capable of receiving the light emitted by the light-emitting part. The calibration gas chamber and the detection gas chamber are both located on a light path of light emitted by the light emitting part. The gas detection device provided by the utility model solves the problem that the existing gas detection equipment is relatively high in maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of gas detection equipment technology, and in particular to a gas detection device. Background Technology

[0002] TDLAS (Tunable Diode Laser Absorption Spectroscopy) technology is based on tunable diode photoelectric components and utilizes the "frequency selectivity" of the gas molecules being measured to achieve the measurement of the gas's characteristics. This method successfully avoids interference from other gas components, making it the preferred solution for current accurate real-time online gas detection systems.

[0003] Current gas detection equipment only has the function of testing the gas being tested, so it requires regular wavelength calibration, resulting in high maintenance costs. Utility Model Content

[0004] The main purpose of this invention is to propose a gas detection device that aims to solve the problem of high maintenance costs in existing gas detection equipment.

[0005] To achieve the above objectives, this utility model proposes a gas detection device, comprising a light-emitting part, a calibration gas chamber, a detection gas chamber, a photoelectric detection component, and a wavelength calibration component that can adjust the wavelength of the light emitted by the light-emitting part. The photoelectric detection component includes a first detection part that can receive the light emitted by the light-emitting part, and the calibration gas chamber and the detection gas chamber are both located in the optical path of the light emitted by the light-emitting part.

[0006] According to some embodiments of the present invention, the wavelength calibration component includes a heating part and a temperature detection part, the light-emitting part is located within the heating range of the heating part, and both the heating part and the temperature detection part are electrically connected to the controller.

[0007] According to some embodiments of the present invention, it further includes an insulating and heat-conducting part, wherein the light-emitting part, the heating part, and the temperature detection part are all disposed on the insulating and heat-conducting part.

[0008] According to some embodiments of the present invention, the heating part and the insulating heat-conducting part are integrally formed.

[0009] According to some embodiments of the present invention, a beam adjustment component is also included, the beam adjustment component including a lens capable of shaping the beam, the lens being located in the light path of the light emitted from the light-emitting part.

[0010] According to some embodiments of the present invention, the beam adjustment assembly further includes an optical path adjustment section, which is located on the optical path of the light emitted by the light-emitting section.

[0011] According to some embodiments of the present invention, it also includes a housing, wherein a receiving cavity is provided inside the housing, and the light-emitting part, the calibration gas chamber, the detection gas chamber, the photoelectric detection component and the wavelength calibration component are all disposed in the receiving cavity.

[0012] According to some embodiments of the present invention, the housing is arranged in the form of a straight tube, the light path of the light emitted by the light-emitting part is on the same straight line as the axis of the housing, and the calibration gas chamber, the detection gas chamber and the first detection part are coaxially packaged along the axial direction of the housing.

[0013] According to some embodiments of the present invention, the photoelectric detection component further includes a second detection unit capable of receiving another beam of light emitted by the light-emitting unit, and both the light-emitting unit and the second detection unit are disposed in the calibration chamber.

[0014] According to some embodiments of the present invention, the first detection unit is disposed in the calibration gas chamber.

[0015] This utility model has at least the following beneficial effects:

[0016] In this invention, the photoelectric detection component includes a first detection unit capable of receiving light emitted from the light-emitting unit. Both the calibration gas chamber and the detection gas chamber are located in the optical path of the light emitted from the light-emitting unit. The operator first introduces the gas to be tested into the calibration gas chamber. The light emitted from the light-emitting unit passes through the gas to be tested in the calibration gas chamber and is partially absorbed. The remaining light is received by the first detection unit, which detects the optical signal waveform and determines the absorption peak position. Then, the wavelength of the light emitted from the light-emitting unit is adjusted by the wavelength calibration component so that the wavelength of the emitted light is aligned with the absorption peak wavelength, thus completing wavelength calibration. Simultaneously, the concentration of the gas in the calibration gas chamber is detected. Then, the gas to be tested is introduced into the detection gas chamber. The light emitted from the light-emitting unit passes through the gas in both the calibration and detection gas chambers. The remaining light is received by the first detection unit to detect the gas concentration. The gas concentration in the detection gas chamber is obtained by subtracting the gas concentration in the calibration gas chamber from the detected gas concentration. This application integrates wavelength calibration and gas detection functions by setting up the calibration gas chamber and the detection gas chamber. Wavelength calibration can be performed before each gas detection. Compared with existing gas detection equipment that only has the function of testing the gas to be tested and requires periodic wavelength calibration, this greatly reduces maintenance costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a gas detection device provided in an embodiment of the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of the internal structure of the shell;

[0020] Figure 3 This is a schematic diagram of the structure of a gas detection device according to another embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures:

[0022] 100-Gas detection device; 1-Light emitting unit; 2-Calibration gas chamber; 3-Detection gas chamber; 4-Photoelectric detection component; 41-First detection unit; 42-Second detection unit; 5-Wavelength calibration component; 51-Heating unit; 52-Temperature detection unit; 6-Insulating and heat-conducting unit; 7-Beam adjustment component; 71-Lens; 72-Optical path adjustment unit; 8-Housing; 81-Receiving cavity; 9-Heat insulation unit. Detailed Implementation

[0023] The technical solutions in the embodiments of this utility model are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0025] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0026] This utility model provides a gas detection device. Figures 1 to 3 This is a specific embodiment of a gas detection device provided by the present invention.

[0027] like Figure 1 and Figure 2 As shown, this utility model embodiment provides a gas detection device 100, including a light-emitting part 1, a calibration gas chamber 2, a detection gas chamber 3, a photoelectric detection component 4, and a wavelength calibration component 5 that can adjust the wavelength of the light emitted by the light-emitting part 1. The photoelectric detection component 4 includes a first detection part 41 that can receive the light emitted by the light-emitting part 1. The calibration gas chamber 2 and the detection gas chamber 3 are both located in the optical path of the light emitted by the light-emitting part 1.

[0028] In this invention, the photoelectric detection component 4 includes a first detection unit 41 capable of receiving light emitted from the light-emitting unit 1. The calibration gas chamber 2 and the detection gas chamber 3 are both located in the optical path of the light emitted from the light-emitting unit 1. The operator first introduces the gas to be tested into the calibration gas chamber 2. The light emitted from the light-emitting unit 1 passes through the gas to be tested in the calibration gas chamber 2 and is partially absorbed. The remaining light is received by the first detection unit 41, which detects the optical signal waveform and determines the absorption peak position. Then, the wavelength of the light emitted from the light-emitting unit 1 is adjusted by the wavelength calibration component 5 so that the wavelength of the light emitted from the light-emitting unit 1 is aligned with the absorption peak wavelength to complete wavelength calibration. Simultaneously, the concentration of the gas in the calibration gas chamber 2 is detected. Then, the gas to be tested is introduced into the detection gas chamber 3. The light emitted from the light-emitting unit 1 passes through the gas in both the calibration gas chamber 2 and the detection gas chamber 3. The remaining light is received by the first detection unit 41 to detect the gas concentration. The gas concentration in the detection gas chamber 3 is obtained by subtracting the gas concentration in the calibration gas chamber 2 from the detected gas concentration. This application integrates wavelength calibration and gas detection functions by setting up the calibration gas chamber 2 and the detection gas chamber 3. Wavelength calibration can be performed before each gas detection. Compared with existing gas detection equipment that only has the function of testing the gas to be tested and requires periodic wavelength calibration, this greatly reduces maintenance costs.

[0029] To protect the components of the gas detection device 100, in some embodiments, such as Figure 1 As shown, the gas detection device 100 also includes a housing 8, within which a receiving cavity 81 is provided. The light-emitting part 1, the calibration gas chamber 2, the detection gas chamber 3, the photoelectric detection component 4, and the wavelength calibration component 5 are all disposed within the receiving cavity 81. This arrangement, by housing all components within the housing 8, not only protects each component but also improves the integration of the gas detection device 100.

[0030] The specific shape of the housing 8 is not limited; in some embodiments, such as... Figure 1 As shown, the housing 8 is a straight tube, and the light path emitted by the light-emitting part 1 is on the same straight line as the axis of the housing 8. The calibration gas chamber 2, the detection gas chamber 3, and the first detection part 41 are coaxially packaged along the axial direction of the housing 8. Specifically, the housing 8 is a coaxially packaged tube, which has lower manufacturing costs and is easy to assemble. Furthermore, because there are many spare parts, it is convenient to repair and replace the housing 8 when it is damaged. The housing 8 can also be a butterfly-shaped packaged tube; the shape of the housing 8 is determined according to actual needs.

[0031] Currently, wavelength adjustment is generally achieved through cooling, but this requires high-performance cooling components, and the corresponding optoelectronic component carriers and cooling components need to be customized, resulting in high procurement costs. Therefore, in some embodiments, such as... Figure 2 As shown, the wavelength calibration component 5 includes a heating unit 51 and a temperature detection unit 52. The light-emitting unit 1 is located within the heating range of the heating unit 51. Both the heating unit 51 and the temperature detection unit 52 are electrically connected to a controller. With this configuration, the controller receives the current temperature detected by the temperature detection unit 52 and controls the amount of heating applied to the light-emitting unit 1 by the heating unit 51, thereby adjusting the wavelength of the light emitted by the light-emitting unit 1. Compared to a cooling method, this eliminates the need for a cooling element, simplifies the manufacturing process, and reduces the production cost of the gas detection device 100.

[0032] Specifically, the heating part 51 is a ceramic resistor, a thin film resistor, a heating wire, or a heatable semiconductor component, and the temperature detection part 52 is a thermistor, an RTD resistor temperature detector, a thermocouple, or an IC sensor.

[0033] Furthermore, in some embodiments, such as Figure 2 As shown, the gas detection device 100 further includes an insulating and heat-conducting part 6, on which the light-emitting part 1, the heating part 51, and the temperature detection part 52 are all disposed. The insulating and heat-conducting part 6 is an insulating pad with low specific heat capacity and high thermal conductivity. By setting the insulating and heat-conducting part 6, it serves two purposes: firstly, it provides insulation; secondly, it can evenly transfer the heat generated by the heating part to the light-emitting part 1, preventing uneven heating of the light-emitting part 1 and thus avoiding damage.

[0034] Preferably, in some embodiments, such as Figure 2 As shown, the gas detection device 100 further includes a heat insulation part 9, which is disposed within the receiving cavity 81 and near the end of the housing 8. The insulating and heat-conducting part 6 is disposed on the side of the heat insulation part 9 facing away from the end of the housing 8. The heat insulation part 9 is an insulating pad with high specific heat capacity and high thermal conductivity. The heat insulation part 9 plays a role in heat preservation, reducing the heat transferred to the outside of the housing 8 and preventing the temperature of the housing 8 from becoming too high. On the other hand, it keeps the light-emitting part 1 at a higher temperature, thereby reducing the heat generation of the heating part and reducing power consumption.

[0035] To improve the assembly efficiency of the gas detection device 100, in some embodiments, the heating element 51 is integrally disposed with the insulating and heat-conducting element 6. This arrangement allows the heating element 51 to be prefabricated and integrated onto the insulating and heat-conducting element 6 during the component manufacturing stage, reducing assembly steps and thus improving the assembly efficiency of the gas detection device 100.

[0036] Different forms of light may be required during the detection process. To be suitable for various detection scenarios, in some embodiments, such as... Figure 1 As shown, the gas detection device 100 further includes a beam adjustment assembly 7, which includes a lens 71 capable of shaping the light beam. The lens 71 is located in the light path emitted from the light-emitting unit 1. The lens 71 can be a spherical lens 71, an aspherical lens 71, or a collimating lens 71. Through the lens 71, the light emitted from the light-emitting unit 1 can be shaped into collimated light, converged light, or divergent light required for detection, thus making it suitable for various detection scenarios.

[0037] In some application scenarios, the first detection unit 41, the calibration gas chamber 2, and the detection gas chamber 3 are not necessarily on the same straight line as the light-emitting unit 1. Therefore, in some embodiments, such as Figure 2 As shown, the beam adjustment assembly 7 further includes a light path adjustment section 72, which is located on the light path of the light emitted from the light-emitting part 1. The light path adjustment section 72 is a reflector, a prism, or a component coated with a reflective film. By adjusting the light path adjustment section 72, the light path of the light emitted by the light-emitting part 1 can be changed, so that the light-emitting part 1 and other components do not need to be on the same straight line, thereby adapting to more application scenarios.

[0038] The calibration chamber 2 can be set up separately or integrated with some components, thereby improving the integration of the gas detection device 100. For example, in some embodiments, such as... Figure 1 and Figure 2 As shown, the photoelectric detection component 4 further includes a second detection unit 42 capable of receiving another beam of light emitted by the light-emitting unit 1. Both the light-emitting unit 1 and the second detection unit 42 are disposed within the calibration chamber 2. The light-emitting unit 1 can emit multiple beams of light in different directions. By integrating the light-emitting unit 1 and the second detection unit 42 within the calibration chamber 2, wavelength calibration can be performed independently within the calibration chamber 2.

[0039] In another embodiment, such as Figure 3 As shown, the first detection unit 41 is disposed within the calibration gas chamber 2. This arrangement improves the integration of the gas detection device 100 by integrating the first detection unit 41 within the calibration gas chamber 2.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gas detection device, characterized in that, It includes a light-emitting part, a calibration gas chamber, a detection gas chamber, a photoelectric detection component, and a wavelength calibration component that can adjust the wavelength of the light emitted by the light-emitting part. The photoelectric detection component includes a first detection part that can receive the light emitted by the light-emitting part. The calibration gas chamber and the detection gas chamber are both located in the optical path of the light emitted by the light-emitting part.

2. The gas detection device as described in claim 1, characterized in that, The wavelength calibration component includes a heating element and a temperature detection element. The light-emitting element is located within the heating range of the heating element, and both the heating element and the temperature detection element are electrically connected to the controller.

3. The gas detection device as described in claim 2, characterized in that, It also includes an insulating and heat-conducting part, and the light-emitting part, the heating part and the temperature detection part are all disposed on the insulating and heat-conducting part.

4. The gas detection device as described in claim 3, characterized in that, The heating element and the insulating heat-conducting element are integrally formed.

5. The gas detection device as described in claim 1, characterized in that, It also includes a beam adjustment assembly, which includes a lens capable of shaping the beam, the lens being located in the light path of the light emitted from the light-emitting part.

6. The gas detection device as described in claim 5, characterized in that, The beam adjustment assembly further includes an optical path adjustment unit, which is located on the optical path of the light emitted by the light-emitting unit.

7. The gas detection device as described in claim 1, characterized in that, It also includes a housing, which has a receiving cavity, and the light-emitting part, the calibration gas chamber, the detection gas chamber, the photoelectric detection component and the wavelength calibration component are all disposed in the receiving cavity.

8. The gas detection device as described in claim 7, characterized in that, The housing is arranged in the form of a straight tube, and the light path of the light emitted by the light-emitting part is on the same straight line as the axis of the housing. The calibration gas chamber, the detection gas chamber and the first detection part are coaxially packaged along the axial direction of the housing.

9. The gas detection device as described in claim 1, characterized in that, The photoelectric detection component further includes a second detection unit capable of receiving another beam of light emitted by the light-emitting unit, and both the light-emitting unit and the second detection unit are disposed in the calibration gas chamber.

10. The gas detection device as described in claim 1, characterized in that, The first detection unit is located in the calibration gas chamber.

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