Multi-gas analysis system based on light absorption signal detection

Abstract

The present invention discloses a multi-gas analysis system based on light absorption signal detection, which relates to the field of gas analysis technology, in order to solve the problems of reduced efficiency and inaccurate detection during gas detection. When the present invention detects gas through an infrared light source, multiple gases are detected according to the wavelength of the infrared absorption spectrum. The gas absorption device includes multiple light absorption cells of specific wavelengths. Multiple types of gas detection are performed at the same detection time to further improve the efficiency of gas detection and shorten the working time. The multi-wave mixing efficiency of the optical signal is confirmed, and the mixing efficiency of the optical signal under the condition of multi-sub-signal wave segmentation is effectively determined. The stability when it is converted into an electrical signal can be evaluated. By confirming the peak power of the multi-wave mixing of the optical signal, the conversion parameters of the optoelectronic components in the sensor are adjusted to further ensure the success rate and reliability of the conversion of the optical signal into the electrical signal.

Description

Technical Field

[0001] The present invention relates to the technical field of gas analysis, and in particular to a multi-gas analysis system based on light absorption signal detection. Background Art

[0002] Gas detection and analysis is a technology that detects and analyzes gas types, concentrations, emissions, usage efficiency, and safety.

[0003] The Chinese patent with publication number CN110132891A discloses a gas detection system in transformer oil based on laser absorption spectroscopy. It mainly predicts early transformer faults by analyzing the composition and content of fault gas dissolved in transformer oil, thereby timely repairing the transformer, extending the service life of the transformer and preventing catastrophic accidents. Although the above patent solves the problem of gas detection, there are still the following problems in actual operation:

[0004] 1. After the multi-gas detection is completed, the detection data is not organized more comprehensively, which makes it inconvenient for the staff to view.

[0005] 2. The gas composition is not tested in more detail, resulting in poor efficiency of gas analysis.

[0006] 3. There is no more perfect signal conversion between optical signals and electrical signals, resulting in low stability during signal conversion. Summary of the invention

[0007] The purpose of the present invention is to provide a multi-gas analysis system based on light absorption signal detection. When the gas is detected by an infrared light source, the multi-gas detection is performed according to the wavelength of the infrared absorption spectrum. The gas absorption device includes a plurality of light absorption cells of specific wavelengths. The detection of multiple types of gases at the same detection time further improves the efficiency of gas detection and shortens the working time. The multi-wave mixing efficiency of the light signal is confirmed, and the mixing efficiency of the light signal under the condition of multi-sub-signal wave segmentation is effectively determined. The stability when converted into an electrical signal can be evaluated. By confirming the peak power of the multi-wave mixing of the light signal and then adjusting the conversion parameters of the optoelectronic elements in the sensor, the success rate and reliability of the conversion of the light signal into the electrical signal can be further guaranteed, and the problems in the prior art can be solved.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A variety of gas analysis systems based on light absorption signal detection, including:

[0010] Light source emitter adjustment unit, used for:

[0011] Confirm the light source transmitter, wherein the light source transmitter is an infrared light source transmitter, and confirm the wavelength of the light source transmitter, wherein the wavelength of the light source transmitter is selected according to the detection range of the detection gas, and perform light signal detection after the wavelength is confirmed;

[0012] Optical signal conversion unit, used for:

[0013] The optical signal is transmitted to the gas absorption device through the optical fiber. The gas in the gas absorption device is detected after being absorbed by the optical signal. After the gas detection is completed, the optical signal is converted into an electrical signal for output;

[0014] Optical absorption gas analysis cell for:

[0015] Extract parameter data from the electrical signal, confirm the data type in the parameter data according to the acquired parameter data, and confirm the type concentration of each data type. After the type concentration and data type are confirmed, mark the data as standard gas data;

[0016] Detection gas sorting display unit, used for:

[0017] The standard gas data is modeled, the gas type and concentration in the detected gas are labeled according to the constructed model, and the model is presented to the display terminal in the form of a visual model.

[0018] Preferably, the light source emitter adjustment unit is further used for:

[0019] The infrared light source transmitter is an infrared light source;

[0020] Before the infrared light source transmitter detects the gas in the gas absorption device, the wavelength of the infrared light source transmitter is adjusted according to the range of the gas absorption device;

[0021] The light emitted by the infrared light source transmitter is transmitted to the optical path through the optical fiber and forms an optical signal.

[0022] Preferably, the optical signal conversion unit comprises:

[0023] Gas detection modules for:

[0024] The infrared light source transmitter is an infrared light source;

[0025] Before the infrared light source transmitter detects the gas in the gas absorption device, the wavelength of the infrared light source transmitter is adjusted according to the range of the gas absorption device;

[0026] And the filtering in the infrared light source transmitter is processed, wherein the infrared absorption spectrum data in the infrared light source transmitter is preprocessed, and the data preprocessing includes data denoising and data smoothing;

[0027] The preprocessed data are baseline corrected according to the baseline correction method;

[0028] Smoothing the preprocessed data according to the smoothing method;

[0029] and performing peak recognition on the data after correction and smoothing, wherein peak recognition is to confirm the peak intensity and peak position in the data;

[0030] After peak identification, the filtered data processed in the infrared light source transmitter is obtained;

[0031] At the same time, the light emitted by the infrared light source transmitter is transmitted to the optical path through the optical fiber and forms an optical signal.

[0032] Preferably, before the infrared light source transmitter detects the gas in the gas absorption device, the wavelength of the infrared light source transmitter is adjusted according to the range of the gas absorption device, including:

[0033] Extracting parameter information of the gas absorption device, wherein the parameter information includes absorption efficiency, ambient temperature and rated flow rate of the gas;

[0034] Extracting gas parameters of the gas to be detected, wherein the gas parameters include a gas constant and a gas thermal conductivity;

[0035] The first adjustment coefficient and the second adjustment coefficient are set using the parameter information of the gas absorption device and the gas parameters of the gas to be detected; wherein the first adjustment coefficient and the second adjustment coefficient are obtained by the following formula:

[0036] ;

[0037] Among them, λ 01 and λ 02 Respectively represent the first adjustment coefficient and the second adjustment coefficient; W f represents the average amplitude of ambient temperature change; W represents the ambient temperature reference value; n represents the total number of gas analyses; L i represents the average gas flow rate of the gas absorption device during the i-th gas analysis process; L e Indicates the rated gas flow rate of the gas absorption device; m indicates the number of gas types; D i represents the thermal conductivity of the i-th gas; N i represents the gas viscosity of the i-th gas; P represents the absorption efficiency of the gas absorption device;

[0038] The target wavelength of the infrared light source emitter is obtained using the first adjustment coefficient and the second adjustment coefficient.

[0039] Preferably, obtaining the target wavelength of the infrared light source emitter by using the first adjustment coefficient and the second adjustment coefficient includes:

[0040] Retrieving the first adjustment coefficient and the second adjustment coefficient;

[0041] The initial target wavelength is obtained by using the first adjustment coefficient; wherein the initial target wavelength is obtained by the following formula:

[0042] ;

[0043] Among them, λ c represents the initial target wavelength; C represents the speed of light; f e Indicates the rated frequency of the electromagnetic waves emitted by the light source; f i It represents the average frequency of electromagnetic waves emitted by the light source of the gas absorption device during the i-th gas analysis process;

[0044] Performing an initial wavelength adjustment on the infrared light source emitter according to the initial target wavelength so that the wavelength of the infrared light source emitter reaches the initial target wavelength;

[0045] After the initial wavelength adjustment, the wavelength of the infrared light source emitter is adjusted for a second time using the second adjustment coefficient to obtain a target wavelength.

[0046] Preferably, after the initial wavelength adjustment, the wavelength of the infrared light source emitter is adjusted for a second time using the second adjustment coefficient to obtain a target wavelength, including:

[0047] Retrieve the initial target wavelength;

[0048] The target wavelength is obtained by combining the second adjustment coefficient with the initial target wavelength; wherein the target wavelength is obtained by the following formula:

[0049] ;

[0050] Among them, λ m represents the target wavelength; C represents the speed of light; f e Indicates the rated frequency of the electromagnetic waves emitted by the light source; c represents the initial target wavelength;

[0051] The infrared light source emitter is subjected to a secondary wavelength adjustment according to the target wavelength, so that the wavelength of the infrared light source emitter reaches the target wavelength.

[0052] Preferably, the optical signal conversion unit comprises:

[0053] Signal conversion module for:

[0054] The infrared light source transmitter converts the absorbed gas from optical signals to electrical signals;

[0055] Before converting the optical signal into an electrical signal for output, the optical signal is divided into a plurality of sub-signal waves and the power and wavelength of each sub-signal wave are detected;

[0056] Selecting an adaptive phase matching factor according to the phase change of the power and wavelength of each sub-signal wave;

[0057] The peak power of the multi-wave mixing of the optical signal is obtained according to the multi-wave mixing efficiency of the optical signal and the power of each sub-signal wave;

[0058] The conversion parameters of the optoelectronic components in the infrared light source transmitter are set according to the peak power of the multi-wave mixing of the optical signal;

[0059] According to the set conversion parameters, the infrared light source transmitter is controlled to convert the optical signal into an electrical signal for output.

[0060] Preferably, the light absorption gas analysis unit comprises:

[0061] Gas type confirmation module for:

[0062] Receive the electrical signal data converted from the optical signal;

[0063] Confirming the parameter data of each gas in the electrical signal, wherein the parameter data of the sample gas is retrieved from a database, and then the gas parameters in the electrical signal are checked against the sample gas parameter data in the database, and after checking, confirming whether the sample gas parameter data in the database contains the gas parameters in the electrical signal;

[0064] Among them, the gas parameters are the chemical composition of each gas;

[0065] The gas type for which this parameter data is determined is determined by its chemical composition.

[0066] Preferably, the light absorption gas analysis unit further comprises:

[0067] Gas concentration confirmation module for:

[0068] According to the gas type, determine the percentage of the gas type in the gas parameter;

[0069] Calculate the concentration value of gas species based on percentage;

[0070] The gas type and the gas concentration data of the gas type are uniquely coded and corresponded;

[0071] Meanwhile, the gas type is the data type and the gas concentration is the type concentration.

[0072] Preferably, the detected gas sorting and display unit comprises:

[0073] Gas data model building blocks for:

[0074] The gas type and gas concentration are obtained respectively;

[0075] Importing the gas type and gas concentration into a model node of a neural network model, wherein the neural network model is retrieved from a model database;

[0076] Perform model training on the gas type and gas concentration data in each model node in the neural network model;

[0077] Among them, model training includes cleaning and verification of gas type and gas concentration data;

[0078] Optimize the model data of the gas types and gas concentration data trained for each model node in the neural network model;

[0079] After optimization, the model data of the gas type and gas concentration data are obtained.

[0080] Visual model rendering module, used for:

[0081] Match the text and chemical composition of each gas type and gas concentration data in the model data;

[0082] After the correspondence is completed, the model conversion is performed through the TensorBoard model tool;

[0083] The converted model is displayed on the display terminal.

[0084] The present invention provides another technical solution, a method comprising the following steps:

[0085] Compared with the prior art, the present invention has the following beneficial effects:

[0086] 1. The multi-gas analysis system based on light absorption signal detection provided by the present invention confirms the multi-wave mixing efficiency of the light signal, which can effectively determine the mixing efficiency of the light signal under the condition of multi-sub-signal wave segmentation, so as to evaluate its stability when converted into an electrical signal. By confirming the peak power of the multi-wave mixing of the light signal and then adjusting the conversion parameters of the optoelectronic elements in the sensor, the success rate and reliability of the conversion of the light signal into the electrical signal can be further guaranteed.

[0087] 2. The multi-gas analysis system based on light absorption signal detection provided by the present invention detects gases through an infrared light source, and detects multiple gases according to the wavelength of the infrared absorption spectrum. The gas absorption device includes multiple light absorption cells of specific wavelengths. Multiple types of gas detection are performed under the same detection time, which further improves the efficiency of gas detection and shortens the working time.

[0088] 3. The multi-gas analysis system based on light absorption signal detection provided by the present invention can visualize the constructed model through a visual model presentation module, which can more intuitively display the key elements and relationships of the model, help the staff to grasp the overall structure of the model more quickly, and thus improve the diversity of gas types. By visually presenting the model, the error of gas types caused by manual operation or calculation errors can be reduced, thereby improving the accuracy of the analysis results of multiple gas types. BRIEF DESCRIPTION OF THE DRAWINGS

[0089] Figure 1 It is a schematic diagram of the overall analysis module of the present invention;

[0090] Figure 2 Schematic diagram of the overall analysis method of the present invention. DETAILED DESCRIPTION

[0091] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not 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.

[0092] In order to solve the problem in the prior art that after the light source emitter detects the gas absorption, there is no more perfect signal conversion between the optical signal and the electrical signal, resulting in low stability during signal conversion, please refer to Figure 1 and Figure 2 , this embodiment provides the following technical solutions:

[0093] A variety of gas analysis systems based on light absorption signal detection, including:

[0094] Light source emitter adjustment unit, used for:

[0095] Confirm the light source transmitter, wherein the light source transmitter is an infrared light source transmitter, and confirm the wavelength of the light source transmitter, wherein the wavelength of the light source transmitter is selected according to the detection range of the detection gas, and perform light signal detection after the wavelength is confirmed;

[0096] Optical signal conversion unit, used for:

[0097] The optical signal is transmitted to the gas absorption device through the optical fiber. The gas in the gas absorption device is detected after being absorbed by the optical signal. After the gas detection is completed, the optical signal is converted into an electrical signal for output;

[0098] Optical absorption gas analysis cell for:

[0099] Extract parameter data from the electrical signal, confirm the data type in the parameter data according to the acquired parameter data, and confirm the type concentration of each data type. After the type concentration and data type are confirmed, mark the data as standard gas data;

[0100] Detection gas sorting display unit, used for:

[0101] The standard gas data is modeled, the gas type and concentration in the detected gas are labeled according to the constructed model, and the model is presented to the display terminal in the form of a visual model.

[0102] Specifically, by identifying the peak intensity and peak position of the spectral peak in the infrared absorption spectrum through the light source transmitter adjustment unit, the type of gas can be effectively evaluated. The optical signal conversion unit can effectively determine the mixing efficiency of the optical signal under the condition of multi-sub-signal wave splitting, so that its stability when converted into an electrical signal can be evaluated. The concentration of each type of gas is confirmed by the light absorption gas analysis unit to ensure the reliability of the measurement results, thereby providing an accurate basis for subsequent operations and processing. The gas detection and display unit can more intuitively display the key elements and relationships of the model, helping staff to grasp the overall structure of the model more quickly, thereby improving the diversity of gas types.

[0103] The light source transmitter adjustment unit is also used for:

[0104] The infrared light source transmitter is an infrared light source;

[0105] Before the infrared light source transmitter detects the gas in the gas absorption device, the wavelength of the infrared light source transmitter is adjusted according to the range of the gas absorption device;

[0106] And the filtering in the infrared light source transmitter is processed, wherein the infrared absorption spectrum data in the infrared light source transmitter is preprocessed, and the data preprocessing includes data denoising and data smoothing;

[0107] The preprocessed data are baseline corrected according to the baseline correction method;

[0108] Smoothing the preprocessed data according to the smoothing method;

[0109] and performing peak recognition on the data after correction and smoothing, wherein peak recognition is to confirm the peak intensity and peak position in the data;

[0110] After peak identification, the filtered data processed in the infrared light source transmitter is obtained;

[0111] At the same time, the light emitted by the infrared light source transmitter is transmitted to the optical path through the optical fiber and forms an optical signal.

[0112] Specifically, the infrared light source in the infrared light source transmitter adopts infrared absorption spectrum for filtering processing. The infrared absorption spectrum data in the infrared light source transmitter is first preprocessed, and then the preprocessed data is smoothed and corrected. Then the data is peak identified, and the peak intensity and peak position of the spectral peak in the infrared absorption spectrum are identified. The type of gas can be effectively evaluated, and the molecular structure in the gas can be inferred based on the spectral peak. The interaction and intensity between molecules can be understood based on the changes in the spectral peak.

[0113] Specifically, before the infrared light source transmitter detects the gas in the gas absorption device, the wavelength of the infrared light source transmitter is adjusted according to the range of the gas absorption device, including:

[0114] Extracting parameter information of the gas absorption device, wherein the parameter information includes absorption efficiency, ambient temperature and rated flow rate of the gas;

[0115] Extracting gas parameters of the gas to be detected, wherein the gas parameters include a gas constant and a gas thermal conductivity;

[0116] The first adjustment coefficient and the second adjustment coefficient are set using the parameter information of the gas absorption device and the gas parameters of the gas to be detected; wherein the first adjustment coefficient and the second adjustment coefficient are obtained by the following formula:

[0117] ;

[0118] Among them, λ 01 and λ 02 Respectively represent the first adjustment coefficient and the second adjustment coefficient; W f represents the average amplitude of ambient temperature change; W represents the ambient temperature reference value; n represents the total number of gas analyses; L i represents the average gas flow rate of the gas absorption device during the i-th gas analysis process; L e Indicates the rated gas flow rate of the gas absorption device; m indicates the number of gas types; D i represents the thermal conductivity of the i-th gas; N i represents the gas viscosity of the i-th gas; P represents the absorption efficiency of the gas absorption device;

[0119] The target wavelength of the infrared light source emitter is obtained using the first adjustment coefficient and the second adjustment coefficient.

[0120] The technical effect of the above technical solution is: by extracting the parameter information of the gas absorption device and the gas parameters of the gas to be detected, and setting the first adjustment coefficient and the second adjustment coefficient according to these parameters, the wavelength of the infrared light source emitter can be adjusted more accurately. This adjustment method takes into account a variety of factors, including ambient temperature, gas flow, gas thermal conductivity, etc., and can better adapt to different gas detection scenarios and improve the accuracy and reliability of wavelength adjustment.

[0121] The above technical solution has strong adaptability. By acquiring the parameter information of the gas absorption device and the gas parameters of the gas to be detected in real time, the wavelength of the infrared light source emitter can be automatically adjusted according to the actual situation, avoiding the tediousness and errors of manual adjustment. At the same time, adaptive adjustment can better cope with environmental changes and changes in gas types, improving the flexibility and adaptability of gas detection.

[0122] By precisely adjusting the wavelength of the infrared light source emitter, gases can be detected more accurately. This precise wavelength adjustment can reduce interference and errors, and improve the accuracy and reliability of gas detection. This is especially important for application scenarios that require high-precision gas detection, such as environmental monitoring, industrial production, medical diagnosis, etc.

[0123] Because multiple parameters and factors are taken into consideration, the above technical solution has strong robustness. In practical applications, even when parameters such as ambient temperature and gas flow rate change, it can maintain high detection accuracy and stability. This helps to reduce failure rate and maintenance costs and improve system reliability and stability.

[0124] By precisely adjusting the wavelength of the infrared light source emitter, energy can be used more efficiently and energy consumption can be reduced. At the same time, since the above technical solution is adaptive and robust, unnecessary adjustment and maintenance work can be reduced, work efficiency can be improved and operating costs can be reduced.

[0125] The above technical solution has strong scalability. With the continuous development of technology and the introduction of new parameters, the above technical solution can be easily expanded to adapt to new application requirements and scenarios. This helps to maintain the advancement and sustainability of technology and extend the life cycle of the technical solution.

[0126] To sum up, the detailed technical effects of the above technical solutions in terms of performance indicators are mainly reflected in wavelength adjustment accuracy, adaptability, improved detection accuracy, enhanced robustness, reduced energy consumption, improved efficiency, and scalability.

[0127] Specifically, obtaining the target wavelength of the infrared light source emitter by using the first adjustment coefficient and the second adjustment coefficient includes:

[0128] Retrieving the first adjustment coefficient and the second adjustment coefficient;

[0129] The initial target wavelength is obtained by using the first adjustment coefficient; wherein the initial target wavelength is obtained by the following formula:

[0130] ;

[0131] Among them, λ c represents the initial target wavelength; C represents the speed of light; f e Indicates the rated frequency of the electromagnetic waves emitted by the light source; f i It represents the average frequency of electromagnetic waves emitted by the light source of the gas absorption device during the i-th gas analysis process;

[0132] Performing an initial wavelength adjustment on the infrared light source emitter according to the initial target wavelength so that the wavelength of the infrared light source emitter reaches the initial target wavelength;

[0133] After the initial wavelength adjustment, the wavelength of the infrared light source emitter is adjusted for a second time using the second adjustment coefficient to obtain a target wavelength.

[0134] The technical effect of the above technical solution is that by combining the first adjustment coefficient and the second adjustment coefficient, the target wavelength of the infrared light source emitter can be obtained more accurately. The first adjustment coefficient takes into account the changes in ambient temperature and gas flow, while the second adjustment coefficient takes into account other parameters such as gas thermal conductivity. This dual adjustment mechanism can better adapt to various complex gas detection scenarios and improve the accuracy and reliability of wavelength adjustment.

[0135] Since the above technical solution can be dynamically adjusted according to the actual gas absorption device parameter information and the gas parameters of the gas to be detected, it has strong dynamic adaptability. Whether in a stable state or a dynamically changing state, the above technical solution can quickly respond and accurately adjust the wavelength of the infrared light source emitter to ensure the accuracy and real-time performance of gas detection.

[0136] The above technical solution simplifies the wavelength adjustment process by calling the first adjustment coefficient and the second adjustment coefficient. Without manual intervention or complex calculations, the system can automatically calculate the target wavelength according to the preset formula and parameter information, and complete the initial wavelength adjustment and the secondary wavelength adjustment. This improves work efficiency and reduces human errors and operational complexity.

[0137] Due to the use of automatic calculation and dynamic adjustment methods, the above technical solution can quickly respond to changes in the environment and changes in gas types. The system can quickly calculate the target wavelength and quickly adjust the wavelength of the infrared light source emitter, shortening the response time and improving the real-time and dynamic nature of gas detection.

[0138] Through precise wavelength adjustment and dynamic adaptive mechanism, the above technical solution can improve the stability of the gas detection system. Even in various complex environments and parameter changes, the system can maintain stable wavelength output to ensure the accuracy and reliability of gas detection.

[0139] The above technical solution has strong scalability and flexibility. With the continuous development of technology and the introduction of new parameters, the calculation formulas of the first adjustment coefficient and the second adjustment coefficient can be easily adjusted and expanded to adapt to new application requirements and scenarios. This helps to maintain the advancement and sustainability of technology and extend the life cycle of the technical solution.

[0140] To sum up, the detailed technical effects of the above technical solutions in terms of performance indicators are mainly reflected in improving the accuracy of wavelength adjustment, dynamic adjustment capability, simplifying the adjustment process, improving response speed, and enhancing system stability, scalability and flexibility.

[0141] Specifically, after the initial wavelength adjustment, the wavelength of the infrared light source emitter is adjusted for the second time using the second adjustment coefficient to obtain the target wavelength, including:

[0142] Retrieve the initial target wavelength;

[0143] The target wavelength is obtained by combining the second adjustment coefficient with the initial target wavelength; wherein the target wavelength is obtained by the following formula:

[0144] ;

[0145] Among them, λ m represents the target wavelength; C represents the speed of light; f e Indicates the rated frequency of the electromagnetic waves emitted by the light source; c represents the initial target wavelength;

[0146] The infrared light source emitter is subjected to a secondary wavelength adjustment according to the target wavelength, so that the wavelength of the infrared light source emitter reaches the target wavelength.

[0147] The technical effect of the above technical solution is that by using the second adjustment coefficient to perform a secondary adjustment on the initial target wavelength, the accuracy of wavelength adjustment can be further improved. The second adjustment coefficient takes into account factors such as gas thermal conductivity, and can make more detailed adjustments to the wavelength to ensure that the wavelength of the infrared light source emitter more accurately matches the absorption characteristics of the target gas.

[0148] The above technical solution has strong adaptability and flexibility. By combining the initial target wavelength and the second adjustment coefficient, it can adapt to the wavelength adjustment requirements under different gas types and environmental conditions. Whether in a stable environment or a changing environment, the above technical solution can flexibly adjust the wavelength to maintain the accuracy and reliability of gas detection.

[0149] The above technical solution can respond quickly and adjust the wavelength. Once the initial target wavelength is obtained, the system can quickly calculate the target wavelength using the second adjustment coefficient and immediately adjust the infrared light source emitter for a second wavelength. This rapid response and adjustment capability ensures the real-time and efficiency of gas detection.

[0150] Through the automatic calculation and adjustment mechanism, the above technical solution simplifies the operation process of wavelength adjustment. Without manual intervention or complicated calculation steps, the system can automatically complete the secondary adjustment of wavelength, improve work efficiency, reduce human errors and operational complexity.

[0151] Accurate wavelength adjustment helps improve the stability of the gas detection system. By ensuring that the wavelength of the infrared light source emitter accurately matches the absorption characteristics of the target gas, interference and errors can be reduced, and the detection accuracy and stability of the system can be improved. This is especially important for application scenarios that require long-term continuous operation and high-precision detection.

[0152] The above technical solution has strong scalability and maintainability. With the continuous development of technology and the introduction of new parameters, the calculation formula of the second adjustment coefficient can be easily adjusted and expanded to adapt to new application requirements and scenarios. At the same time, the modular design of the system makes maintenance and upgrading more convenient and efficient.

[0153] In summary, the detailed technical effects of the above technical solutions in terms of performance indicators are mainly reflected in the accuracy, adaptability and flexibility of wavelength adjustment, rapid response and adjustment, simplified operation process, improved system stability, scalability and maintainability, etc.

[0154] An optical signal conversion unit, comprising:

[0155] Gas detection modules for:

[0156] The light signal of the infrared light source transmitter transmits the light source to the gas in the gas absorption device;

[0157] Wherein, the gas absorption device comprises a plurality of light absorption cells of specific wavelengths, and the light absorption cells are used to absorb the gas;

[0158] After the gas in the gas device receives the light from the infrared light source transmitter, the infrared light source transmitter absorbs the gas.

[0159] Signal conversion module for:

[0160] The infrared light source transmitter converts the absorbed gas from optical signals to electrical signals;

[0161] Before converting the optical signal into an electrical signal for output, the optical signal is divided into a plurality of sub-signal waves and the power and wavelength of each sub-signal wave are detected;

[0162] Selecting an adaptive phase matching factor according to the phase change of the power and wavelength of each sub-signal wave;

[0163] The peak power of the multi-wave mixing of the optical signal is obtained according to the multi-wave mixing efficiency of the optical signal and the power of each sub-signal wave;

[0164] The conversion parameters of the optoelectronic components in the infrared light source transmitter are set according to the peak power of the multi-wave mixing of the optical signal;

[0165] According to the set conversion parameters, the infrared light source transmitter is controlled to convert the optical signal into an electrical signal for output.

[0166] Specifically, the gas in the gas absorption device is absorbed according to the gas detection module. When light passes through the gas sample, the gas molecules in the sample absorb light of a specific wavelength, resulting in a decrease in light intensity. This absorption is proportional to the gas concentration, so it can be used to quantitatively detect the gas concentration. The multi-wave mixing efficiency of the optical signal is confirmed by the signal conversion module, and the mixing efficiency of the optical signal under the condition of multi-sub-signal wave segmentation can be effectively determined, so that its stability when converted into an electrical signal can be evaluated, thereby improving work efficiency. Furthermore, by confirming the peak power of the multi-wave mixing of the optical signal, and then adjusting the conversion parameters of the optoelectronic components in the sensor, the success rate and reliability of converting the optical signal into an electrical signal can be further guaranteed, further improving the work efficiency and stability of gas component detection.

[0167] In order to solve the problem that the gas composition is not detected in more detail in the prior art, resulting in poor efficiency of gas analysis, please refer to Figure 1 and Figure 2 , this embodiment provides the following technical solutions:

[0168] Optical absorption gas analysis unit, comprising:

[0169] Gas type confirmation module for:

[0170] Receive the electrical signal data converted from the optical signal;

[0171] Confirming the parameter data of each gas in the electrical signal, wherein the parameter data of the sample gas is retrieved from a database, and then the gas parameters in the electrical signal are checked against the sample gas parameter data in the database, and after checking, confirming whether the sample gas parameter data in the database contains the gas parameters in the electrical signal;

[0172] Among them, the gas parameters are the chemical composition of each gas;

[0173] The gas type for which this parameter data is determined is determined by its chemical composition.

[0174] Gas concentration confirmation module for:

[0175] According to the gas type, determine the percentage of the gas type in the gas parameter;

[0176] Calculate the concentration value of gas species based on percentage;

[0177] The gas type and the gas concentration data of the gas type are uniquely coded and corresponded;

[0178] Meanwhile, the gas type is the data type and the gas concentration is the type concentration.

[0179] Specifically, the type of each gas in the detected gas is confirmed by the gas type confirmation module, which can effectively ensure the working efficiency of gas detection. When the gas is detected by an infrared light source, multiple gases are detected according to the wavelength of the infrared absorption spectrum. The gas absorption device includes multiple light absorption cells with specific wavelengths. Detecting multiple types of gases at the same detection time further improves the efficiency of gas detection and shortens the working time. The concentration of each type of gas is confirmed by the gas concentration confirmation module to ensure the reliability of the measurement results, thereby providing an accurate basis for subsequent operations and processing. When the gas concentration is detected to be too high, timely measures can be taken to deal with it to avoid the occurrence of safety accidents, thereby improving the safety of gas detection.

[0180] In order to solve the problem in the prior art that after the multi-gas detection is completed, the detection data is not sorted out more completely, which makes it inconvenient for the staff to view, please refer to Figure 1 and Figure 2 , this embodiment provides the following technical solutions:

[0181] Detection gas sorting and display unit, including:

[0182] Gas data model building blocks for:

[0183] The gas type and gas concentration are obtained respectively;

[0184] Importing the gas type and gas concentration into a model node of a neural network model, wherein the neural network model is retrieved from a model database;

[0185] Perform model training on the gas type and gas concentration data in each model node in the neural network model;

[0186] Among them, model training includes cleaning and verification of gas type and gas concentration data;

[0187] Optimize the model data of the gas types and gas concentration data trained for each model node in the neural network model;

[0188] After optimization, the model data of the gas type and gas concentration data are obtained.

[0189] Visual model rendering module, used for:

[0190] Match the text and chemical composition of each gas type and gas concentration data in the model data;

[0191] After the correspondence is completed, the model conversion is performed through the TensorBoard model tool;

[0192] The converted model is displayed on the display terminal.

[0193] Specifically, the concentration and type of the detected gas are modeled using a neural network through the gas data model building module. By building a model for the concentration and type of the gas, accurate predictions can be made on new, unseen data outside of the training data, thereby further improving the accuracy and completeness of gas detection. The constructed model can be visualized through the visual model presentation module, which can more intuitively display the key elements and relationships of the model, helping staff to grasp the overall structure of the model more quickly, thereby increasing the diversity of gas types. By visually presenting the model, errors in gas types caused by manual operations or calculation errors can be reduced, thereby improving the accuracy of multi-gas type analysis results.

[0194] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0195] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A multi-gas analysis system based on light absorption signal detection, characterized in that: include: Light source emitter adjustment unit, used for: Confirm the light source transmitter, wherein the light source transmitter is an infrared light source transmitter, and confirm the wavelength of the light source transmitter, wherein the wavelength of the light source transmitter is selected according to the detection range of the detection gas, and perform light signal detection after the wavelength is confirmed; Optical signal conversion unit, used for: The optical signal is transmitted to the gas absorption device through the optical fiber. The gas in the gas absorption device is detected after being absorbed by the optical signal. After the gas detection is completed, the optical signal is converted into an electrical signal for output; Optical absorption gas analysis cell for: Extract parameter data from the electrical signal, confirm the data type in the parameter data according to the acquired parameter data, and confirm the type concentration of each data type. After the type concentration and data type are confirmed, mark the data as standard gas data; Detection gas sorting display unit, used for: The standard gas data is modeled, the gas type and concentration in the detected gas are marked according to the constructed model, and the model is presented to the display terminal in the form of a visual model; The light source transmitter adjustment unit is further used for: The infrared light source transmitter is an infrared light source; Before the infrared light source transmitter detects the gas in the gas absorption device, the wavelength of the infrared light source transmitter is adjusted according to the range of the gas absorption device; And the filtering in the infrared light source transmitter is processed, wherein the infrared absorption spectrum data in the infrared light source transmitter is preprocessed, and the data preprocessing includes data denoising and data smoothing; The preprocessed data are baseline corrected according to the baseline correction method; Smoothing the preprocessed data according to the smoothing method; and performing peak recognition on the data after correction and smoothing, wherein peak recognition is to confirm the peak intensity and peak position in the data; After peak identification, the filtered data processed in the infrared light source transmitter is obtained; At the same time, the light emitted by the infrared light source transmitter is transmitted to the optical path through the optical fiber and forms an optical signal; Before the infrared light source transmitter detects the gas in the gas absorption device, the wavelength of the infrared light source transmitter is adjusted according to the range of the gas absorption device, including: Extracting parameter information of the gas absorption device, wherein the parameter information includes absorption efficiency, ambient temperature and rated flow rate of the gas; Extracting gas parameters of the gas to be detected, wherein the gas parameters include a gas constant and a gas thermal conductivity; The first adjustment coefficient and the second adjustment coefficient are set using the parameter information of the gas absorption device and the gas parameters of the gas to be detected; wherein the first adjustment coefficient and the second adjustment coefficient are obtained by the following formula: ； Among them, λ 01 and λ 02 Respectively represent the first adjustment coefficient and the second adjustment coefficient; W f represents the average amplitude of ambient temperature change; W represents the ambient temperature reference value; n represents the total number of gas analyses; L i represents the average gas flow rate of the gas absorption device during the i-th gas analysis process; L e Indicates the rated gas flow rate of the gas absorption device; m indicates the number of gas types; D i represents the thermal conductivity of the i-th gas; N i represents the gas viscosity of the i-th gas; P represents the absorption efficiency of the gas absorption device; Obtaining a target wavelength of the infrared light source emitter using the first adjustment coefficient and the second adjustment coefficient; Obtaining the target wavelength of the infrared light source emitter by using the first adjustment coefficient and the second adjustment coefficient includes: Retrieving the first adjustment coefficient and the second adjustment coefficient; The initial target wavelength is obtained by using the first adjustment coefficient; wherein the initial target wavelength is obtained by the following formula: ； Among them, λ c represents the initial target wavelength; C represents the speed of light; f e Indicates the rated frequency of the electromagnetic waves emitted by the light source; f i It represents the average frequency of electromagnetic waves emitted by the light source of the gas absorption device during the i-th gas analysis process; Performing an initial wavelength adjustment on the infrared light source emitter according to the initial target wavelength so that the wavelength of the infrared light source emitter reaches the initial target wavelength; After the initial wavelength adjustment, the wavelength of the infrared light source emitter is adjusted for a second time using the second adjustment coefficient to obtain a target wavelength; After the initial wavelength adjustment, the wavelength of the infrared light source emitter is adjusted for a second time using the second adjustment coefficient to obtain a target wavelength, including: Retrieve the initial target wavelength; The target wavelength is obtained by combining the second adjustment coefficient with the initial target wavelength; wherein the target wavelength is obtained by the following formula: ； Among them, λ m represents the target wavelength; C represents the speed of light; f e Indicates the rated frequency of the electromagnetic waves emitted by the light source; c represents the initial target wavelength; The infrared light source emitter is subjected to a secondary wavelength adjustment according to the target wavelength, so that the wavelength of the infrared light source emitter reaches the target wavelength.

2. The multi-gas analysis system based on light absorption signal detection according to claim 1, characterized in that: The optical signal conversion unit comprises: Gas detection modules for: The light signal of the infrared light source transmitter transmits the light source to the gas in the gas absorption device; Wherein, the gas absorption device comprises a plurality of light absorption cells of specific wavelengths, and the light absorption cells are used to absorb the gas; After the gas in the gas device receives the light from the infrared light source transmitter, the infrared light source transmitter absorbs the gas.

3. The multi-gas analysis system based on light absorption signal detection according to claim 2, characterized in that: The optical signal conversion unit comprises: Signal conversion module for: The infrared light source transmitter converts the absorbed gas from optical signals to electrical signals; Before converting the optical signal into an electrical signal for output, the optical signal is divided into a plurality of sub-signal waves and the power and wavelength of each sub-signal wave are detected; Selecting an adaptive phase matching factor according to the phase change of the power and wavelength of each sub-signal wave; The peak power of the multi-wave mixing of the optical signal is obtained according to the multi-wave mixing efficiency of the optical signal and the power of each sub-signal wave; The conversion parameters of the optoelectronic components in the infrared light source transmitter are set according to the peak power of the multi-wave mixing of the optical signal; According to the set conversion parameters, the infrared light source transmitter is controlled to convert the optical signal into an electrical signal for output.

4. The multi-gas analysis system based on light absorption signal detection according to claim 3, characterized in that: The light absorption gas analysis unit comprises: Gas type confirmation module for: Receive the electrical signal data converted from the optical signal; Confirming the parameter data of each gas in the electrical signal, wherein the parameter data of the sample gas is retrieved from a database, and then the gas parameters in the electrical signal are checked against the sample gas parameter data in the database, and after checking, confirming whether the sample gas parameter data in the database contains the gas parameters in the electrical signal; Among them, the gas parameters are the chemical composition of each gas; The gas type for which this parameter data is determined is determined by its chemical composition.

5. The multi-gas analysis system based on light absorption signal detection according to claim 4, characterized in that: The light absorption gas analysis unit further comprises: Gas concentration confirmation module for: According to the gas type, determine the percentage of the gas type in the gas parameter; Calculate the concentration value of gas species based on percentage; The gas type and the gas concentration data of the gas type are uniquely coded and corresponded; Meanwhile, the gas type is the data type and the gas concentration is the type concentration.

6. The multi-gas analysis system based on light absorption signal detection according to claim 5, characterized in that: The detected gas sorting and display unit comprises: Gas data model building blocks for: The gas type and gas concentration are obtained respectively; Importing the gas type and gas concentration into a model node of a neural network model, wherein the neural network model is retrieved from a model database; Perform model training on the gas type and gas concentration data in each model node in the neural network model; Among them, model training includes cleaning and verification of gas type and gas concentration data; Optimize the model data of the gas types and gas concentration data trained for each model node in the neural network model; After optimization, model data of the gas type and gas concentration data are obtained; Visual model rendering module, used for: Match the text and chemical composition of each gas type and gas concentration data in the model data; After the correspondence is completed, the model conversion is performed through the TensorBoard model tool; The converted model is displayed on the display terminal.

Images