Measuring range switching type carbon dioxide content analysis device and method

Abstract

The invention provides a range switching type carbon dioxide content analysis device and method. The measuring range switching type carbon dioxide content analysis device comprises a detection pipeline, an infrared light source and a measurement light filter are arranged at the gas inlet end and the gas outlet end of the detection pipeline respectively, two or more detection modules with different carbon dioxide detection measuring ranges are arranged on the outer side of the measurement light filter, an adjustable light barrier is arranged in the detection pipeline, and the adjustable light barrier is arranged on the outer side of the measurement light filter. And infrared light emitted by the infrared light source is switched among the more than two detection modules through the measurement optical filter by adjusting the adjustable light barrier so as to output detection data of a corresponding detection range. According to the range switching type carbon dioxide content analysis device and method, the proper detection range can be selected to detect the carbon dioxide content, the detection precision is high, and the requirements of different application scenes can be well met.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon dioxide detection, and in particular to a range-switching carbon dioxide content analysis device and method. Background Art

[0002] Carbon dioxide detection methods mainly include electrochemical method and infrared spectroscopy. The electrochemical method mainly uses electrochemical sensors to monitor the carbon dioxide concentration in the sample in real time and convert it into an electrical signal output. The infrared spectroscopy method mainly uses the absorption characteristics of carbon dioxide molecules to infrared light to determine the carbon dioxide content.

[0003] In many industrial processes, it is necessary to monitor and control the carbon dioxide content in the production environment. Carbon dioxide content analysis devices can be used to monitor the carbon dioxide concentration in industrial emissions, help companies implement emission reduction measures, and improve production efficiency. However, the carbon dioxide detection devices and methods in the prior art cannot use the same set of detection devices for detection under a suitable range. Even if wide-range measurements can be achieved, the detection accuracy is low and cannot meet the measurement requirements. Therefore, it is urgent to design a carbon dioxide content analysis device and method with automatic range switching.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The object of the present invention is to provide a range-switching carbon dioxide content analysis device and method, which can select a suitable detection range to detect the carbon dioxide content, have high detection accuracy, and can well meet the needs of different application scenarios.

[0006] The present invention provides a range-switching carbon dioxide content analysis device, comprising a detection pipeline, wherein an infrared light source and a measuring filter are respectively arranged at an air inlet end and an air outlet end of the detection pipeline, more than two detection modules with different carbon dioxide detection ranges are arranged on the outer side of the measuring filter, and an adjustable light baffle is arranged inside the detection pipeline, and the infrared light emitted by the infrared light source is switched between the more than two detection modules through the measuring filter by adjusting the adjustable light baffle to output detection data corresponding to the detection range.

[0007] Furthermore, a low-range detection module and a high-range detection module are provided on the outer side of the measuring filter. The detection range of the low-range detection module is 0-5000ppm, and the detection range of the high-range detection module is 1-30%.

[0008] Furthermore, a reference filter is provided outside the detection pipeline, and a reference module is provided outside the reference filter. The infrared light emitted by the infrared light source is received by the reference module through the reference filter to output reference data.

[0009] Furthermore, an adjustable reflector is provided inside the detection pipe, and the adjustable reflector can switch the infrared light emitted by the infrared light source between the reference module and the detection module.

[0010] Furthermore, the detection pipe is an L-shaped structure, the adjustable reflector is arranged at the inner corner position of the detection pipe, the reference filter and the reference module are arranged in sequence below the adjustable reflector, and the adjustable reflector can be adjusted in a vertical position and a 45-degree position.

[0011] Furthermore, the range-switching carbon dioxide content analysis device of the present invention also includes a micro motor, which is connected to an adjustable light shielding plate, and the micro motor can adjust the angle of the adjustable light shielding plate.

[0012] Furthermore, the range-switching carbon dioxide content analysis device of the present invention also includes a control unit, which is connected to the detection module and the micro motor. The detection module transmits the detection data to the control unit. When the detection data does not match the detection range, the control unit controls the micro motor to adjust the adjustable light shielding plate to switch the detection module.

[0013] The present invention also provides a range-switching carbon dioxide content analysis method, which uses the range-switching carbon dioxide content analysis device to perform carbon dioxide content analysis.

[0014] Furthermore, the range switching type carbon dioxide content analysis method of the present invention comprises the following steps:

[0015] S1: Introduce the gas to be detected into the detection pipeline, turn on the infrared light source, and adjust the adjustable light shield so that the infrared light emitted by the infrared light source is received by the selected detection module through the measuring filter;

[0016] S2: The selected detection module outputs the detection data. If the detection data matches the detection range, the detection data is output. If the detection data does not match the detection range, the adjustable light shield is adjusted to switch the infrared light emitted by the infrared light source to other detection modules until the output detection data matches the detection range.

[0017] Furthermore, the infrared light emitted by the infrared light source is first received by the reference module through the reference filter and the reference data is output, and then the infrared light emitted by the infrared light source is received by the detection module through the measurement filter, and the detection module outputs the detection data based on the reference data.

[0018] The range-switching carbon dioxide content analysis device of the present invention is provided with more than two detection modules with different carbon dioxide detection ranges. By adjusting the adjustable light-blocking plate, the infrared light emitted by the infrared light source is switched between the more than two detection modules through the measuring filter to output the detection data of the corresponding detection range. The appropriate detection range can be selected according to actual needs to detect the carbon dioxide content, thereby improving the detection accuracy and being able to well meet the needs of different application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a range-switching carbon dioxide content analysis device.

[0021] Description of reference numerals:

[0022] 1: Detection pipeline; 2: Infrared light source; 3: Air inlet; 4: Adjustable reflector; 5: Adjustable light baffle; 6: Air outlet; 7: Measuring filter; 8: Low-range detection module; 9: High-range detection module; 10: Reference module; 11: Reference filter. DETAILED DESCRIPTION

[0023] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0024] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form also includes the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this description, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0025] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Example 1

[0027] Combination Figure 1 As shown, the range-switching carbon dioxide content analysis device of this embodiment includes a detection pipeline 1, an infrared light source 2 and a measuring filter 7 are respectively provided at the air inlet end and the air outlet end of the detection pipeline 1, more than two detection modules with different carbon dioxide detection ranges are provided on the outer side of the measuring filter 7, and an adjustable light baffle 5 is provided inside the detection pipeline 1. By adjusting the adjustable light baffle 5, the infrared light emitted by the infrared light source 2 is switched between the more than two detection modules through the measuring filter 7 to output detection data corresponding to the detection range.

[0028] The detection pipeline 1 is mainly used for the flow of the gas to be detected, and an air inlet 3 and an air outlet 6 are respectively provided at the air inlet and air outlet ends of the detection pipeline 1. There is no strict restriction on the specific shape of the detection pipeline 1, and it can be reasonably set according to actual working conditions. For example, the detection pipeline 1 can adopt an L-shaped structure.

[0029] The infrared light source 2 is arranged at the air inlet end of the detection pipeline 1. The infrared light source 2 is mainly used to emit infrared light of a specific wavelength (e.g., 1-20 μm). Carbon dioxide molecules have absorption characteristics for infrared light. When the infrared light emitted by the infrared light source 2 passes through the detection pipeline 1, the carbon dioxide in the gas to be detected in the detection pipeline 1 absorbs the infrared light of a specific wavelength. The relationship between the carbon dioxide content and the absorption intensity can be used to determine the carbon dioxide content.

[0030] The measuring filter 7 is arranged at the outlet end of the detection pipeline 1, and the measuring filter 7 is mainly used to filter infrared light; since carbon dioxide gas has a strong absorption peak at 4.26 μm, the wavelength of the measuring filter 7 can be 4.26 μm (i.e., infrared light of 4.26 μm can pass through the measuring filter 7). It can be understood that the infrared light emitted by the infrared light source 2 should be able to pass through the detection pipeline 1 and the measuring filter 7 to be received by the detection module, and then the carbon dioxide content detection is realized through the detection module.

[0031] The detection module is arranged outside the measuring filter 7. The detection module is mainly used to detect and output the detection data of the carbon dioxide content. A conventional carbon dioxide detection module in the art can be used. Specifically, the detection module usually includes an infrared carbon dioxide sensor, a digital filtering circuit, an amplifying circuit, a current stabilizing circuit, a single-chip microcomputer system, a temperature compensation, etc. The infrared carbon dioxide sensor converts the detected carbon dioxide gas concentration into a corresponding electrical signal. The output electrical signal is input into the single-chip microcomputer system after filtering and amplification processing, and after temperature and air pressure compensation and other processing, the single-chip microcomputer system outputs the detection data to the display device. In addition, a processing chip for analyzing the detection data can be set on the surface of the detection pipeline 1.

[0032] The detection module has different carbon dioxide detection ranges; there is no strict restriction on the number of detection modules and the corresponding detection ranges, which can be reasonably set according to actual detection needs. In this embodiment, a low-range detection module 8 and a high-range detection module 9 are provided on the outside of the measuring filter 7, and the low-range detection module 8 and the high-range detection module 9 can be arranged side by side on the outside of the measuring filter 7. The detection range of the low-range detection module 8 can be 0-5000ppm, and the detection range (volume content) of the high-range detection module 9 can be 1-30%; in other embodiments, other detection ranges can also be set according to actual needs.

[0033] The adjustable light shielding plate 5 is mainly used to block the infrared light in the detection pipeline 1 in a direction so that the infrared light emitted by the infrared light source 2 can only be received by the selected detection module, but not by other detection modules; there is no strict restriction on the specific structure of the adjustable light shielding plate 5, as long as it can achieve the above function. Specifically, the adjustable light shielding plate 5 can be rod-shaped, and the cross-sectional shape of the adjustable light shielding plate 5 can be sector-shaped, and the central angle and other dimensions of the sector can be reasonably determined according to the number and setting method of the detection modules.

[0034] When setting the low-range detection module 8 and the high-range detection module 9, the cross-sectional shape of the adjustable light baffle 5 can be set to a semicircle; when the selected detection module is the low-range detection module 8, the adjustable light baffle 5 can be adjusted to the infrared light path position corresponding to the high-range detection module 9, at which time the infrared light can only enter the low-range detection module 8, and the infrared light at the infrared light path position corresponding to the high-range detection module 9 is blocked by the adjustable light baffle 5, so the infrared light cannot enter the high-range detection module 9; similarly, when the selected detection module is the high-range detection module 9, the adjustable light baffle 5 can be adjusted to the infrared light path position corresponding to the low-range detection module 8, at which time the infrared light can only enter the high-range detection module 9, and the adjustable light baffle 5 blocks the infrared light from entering the low-range detection module 8.

[0035] There is no strict restriction on the adjustment method of the adjustable light baffle 5. For example, it can be adjusted by setting a micro motor. The output end of the micro motor can be connected to the adjustable light baffle 5. The adjustable light baffle 5 is driven to rotate by the micro motor, thereby adjusting the angle of the adjustable light baffle 5.

[0036] Furthermore, a reference filter 11 is provided outside the detection pipeline 1, and a reference module 10 is provided outside the reference filter 11. The infrared light emitted by the infrared light source 2 is received by the reference module 10 through the reference filter 11 to output reference data. The reference filter 11 and the reference module 10 are mainly used for calibration. The infrared light emitted by the infrared light source 2 can first be received by the reference module 10 through the reference filter 11 and the reference data can be output, and then the infrared light emitted by the infrared light source 2 can be received by the detection module through the measuring filter 7. The detection module outputs the detection data based on the reference data, thereby improving the accuracy of the detection.

[0037] In addition, an adjustable reflector 4 is provided inside the detection pipeline 1, and the adjustable reflector 4 can switch the infrared light emitted by the infrared light source 2 between the reference module 10 and the detection module. In the present embodiment, the detection pipeline 1 is an L-shaped structure, and the adjustable reflector 4 can be arranged at the inner corner position of the detection pipeline 1, and the reference filter 11 and the reference module 10 are arranged in turn below the adjustable reflector 4, and the adjustable reflector 4 can be adjusted in a vertical position and a 45-degree position. When the adjustable reflector 4 is in a vertical position, the infrared light emitted by the infrared light source 2 is received by the reference module 10 through the reference filter 11 and the reference data is output; when the adjustable reflector 4 is in a 45-degree position, the infrared light emitted by the infrared light source 2 is reflected by the adjustable reflector 4 and received by the detection module through the measuring filter 7. In other embodiments, when the detection pipeline 1 is of other shapes and structures, the adjustable reflector 4 can be arranged at a suitable angle position according to actual conditions, so that the infrared light emitted by the infrared light source 2 can be received by the detection module after being reflected by the adjustable reflector 4.

[0038] The range-switching carbon dioxide content analysis device of this embodiment may further include a control unit, which is connected to the detection module and the micro motor. The detection module transmits the detection data to the control unit. When the detection data does not match the detection range, the control unit controls the micro motor to adjust the adjustable light shielding plate 5 to switch the detection module until the detection data output by the detection module matches the detection range.

[0039] The range-switching carbon dioxide content analysis device of the present embodiment is provided with more than two detection modules with different carbon dioxide detection ranges. By adjusting the adjustable light-blocking plate 5, the infrared light emitted by the infrared light source 2 is switched between the more than two detection modules through the measuring filter 7, thereby outputting the detection data of the corresponding detection range. The appropriate detection range can be selected according to actual needs to detect the carbon dioxide content, thereby improving the detection accuracy and being able to well meet the needs of different application scenarios.

[0040] Example 2

[0041] The range switching type carbon dioxide content analysis method of this embodiment uses the range switching type carbon dioxide content analysis device of embodiment 1 to perform carbon dioxide content analysis, including the following steps:

[0042] S1: introducing the gas to be detected into the detection pipeline 1, turning on the infrared light source 2, and adjusting the adjustable light shielding plate 5 so that the infrared light emitted by the infrared light source 2 is received by the selected detection module through the measuring filter 7;

[0043] S2: The selected detection module outputs the detection data. If the detection data matches the detection range, the detection data is output. If the detection data does not match the detection range, the adjustable light shielding plate 5 is adjusted to switch the infrared light emitted by the infrared light source 2 to other detection modules until the output detection data matches the detection range.

[0044] Furthermore, the infrared light emitted by the infrared light source 2 is first received by the reference module 10 through the reference filter 11 and the reference data is output, and then the infrared light emitted by the infrared light source 2 is received by the detection module through the measurement filter 7, and the detection module outputs the detection data based on the reference data.

[0045] More specifically, the gas to be detected is introduced into the detection pipeline 1 through the air inlet 3, the infrared light source 2 is turned on at the same time, the adjustable reflector 4 is adjusted to a vertical position, the high-range detection module 9 is selected, and the adjustable light baffle 5 is adjusted to the infrared light path position corresponding to the low-range detection module 8.

[0046] The infrared light emitted by the infrared light source 2 is first received by the reference module 10 through the reference filter 11 and the reference data is output. Then the adjustable reflector 4 is adjusted to a 45-degree position. The infrared light emitted by the infrared light source 2 is reflected by the adjustable reflector 4 and then received by the high-range detection module 9 through the measuring filter 7. The high-range detection module 9 outputs detection data based on the reference data.

[0047] The detection data is compared. If the detection data matches the detection range of the high-range detection module 9, the detection data is directly output; if the detection data does not match the detection range of the high-range detection module 9, the control unit controls the micromotor to adjust the adjustable light baffle 5 to the infrared light path position corresponding to the high-range detection module 9. At this time, the infrared light emitted by the infrared light source 2 is reflected by the adjustable reflector 4 and then received by the low-range detection module 8 through the measuring filter 7. The low-range detection module 8 outputs the detection data based on the reference data. If the detection data matches the detection range of the low-range detection module 8, the detection data is directly output.

[0048] The range-switching carbon dioxide content analysis method of this embodiment can select a suitable detection range to detect the carbon dioxide content, has high detection accuracy, and can well meet the needs of different application scenarios.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A range-switching carbon dioxide content analysis device, characterized in that: The invention comprises a detection pipeline, wherein an infrared light source and a measuring filter are respectively arranged at the air inlet end and the air outlet end of the detection pipeline, more than two detection modules with different carbon dioxide detection ranges are arranged at the outer side of the measuring filter, and an adjustable light baffle is arranged inside the detection pipeline. By adjusting the adjustable light baffle, the infrared light emitted by the infrared light source is switched between the more than two detection modules through the measuring filter to output detection data of the corresponding detection range.

2. The range switching type carbon dioxide content analysis device according to claim 1, characterized in that: A low-range detection module and a high-range detection module are arranged on the outer side of the measuring filter. The detection range of the low-range detection module is 0-5000ppm, and the detection range of the high-range detection module is 1-30%.

3. The range-switching carbon dioxide content analysis device according to claim 1, characterized in that: A reference filter is arranged outside the detection pipeline, and a reference module is arranged outside the reference filter. The infrared light emitted by the infrared light source is received by the reference module through the reference filter to output reference data.

4. The range-switching carbon dioxide content analysis device according to claim 3, characterized in that: An adjustable reflector is arranged inside the detection pipeline, and the adjustable reflector can switch the infrared light emitted by the infrared light source between the reference module and the detection module.

5. The range-switching carbon dioxide content analysis device according to claim 4, characterized in that: The detection pipeline is of L-shaped structure, the adjustable reflector is arranged at the inner corner position of the detection pipeline, the reference filter and the reference module are arranged in sequence below the adjustable reflector, and the adjustable reflector can be adjusted in the vertical position and the 45-degree position.

6. The range-switching carbon dioxide content analysis device according to claim 1, characterized in that: It also includes a micro motor, which is connected to the adjustable light shielding plate, and the micro motor can adjust the angle of the adjustable light shielding plate.

7. The range-switching carbon dioxide content analysis device according to claim 6, characterized in that: It also includes a control unit, which is connected to the detection module and the micro motor. The detection module transmits the detection data to the control unit. When the detection data does not match the detection range, the control unit controls the micro motor to adjust the adjustable light shielding plate to switch the detection module.

8. A range switching carbon dioxide content analysis method, characterized in that: Carbon dioxide content analysis is performed using the range-switching carbon dioxide content analysis device described in any one of claims 1 to 7.

9. The range switching carbon dioxide content analysis method according to claim 8, characterized in that: The steps include: S1: Introduce the gas to be detected into the detection pipeline, turn on the infrared light source, and adjust the adjustable light shield so that the infrared light emitted by the infrared light source is received by the selected detection module through the measuring filter; S2: The selected detection module outputs the detection data. If the detection data matches the detection range, the detection data is output. If the detection data does not match the detection range, the adjustable light shield is adjusted to switch the infrared light emitted by the infrared light source to other detection modules until the output detection data matches the detection range.

10. The range switching carbon dioxide content analysis method according to claim 9, characterized in that: First, the infrared light emitted by the infrared light source is received by the reference module through the reference filter and the reference data is output. Then, the infrared light emitted by the infrared light source is received by the detection module through the measurement filter. The detection module outputs the detection data based on the reference data.

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