Carbon dioxide gas detection device and method, electronic equipment and storage medium

Abstract

The invention discloses a carbon dioxide gas detection device and method, electronic equipment and a storage medium, and relates to the technical field of greenhouse gas detection. The method comprises the following steps: a gas input unit used for transmitting CO2 gas to be detected; the sensor measuring range switching unit is used for feeding the CO2 gas to be detected into the sensor with the corresponding measuring range according to the shunting instruction to carry out laser detection so as to obtain a detection optical signal; the remote control detection unit is used for carrying out concentration calculation according to the detection light signal to obtain the CO2 gas concentration at the current moment, judging the sensor range at the next moment according to the CO2 gas concentration at the current moment and outputting a corresponding shunting instruction to realize multi-range gas detection of the same gas source in the same environment; the shunting instruction comprises selection of a high-range sensor and selection of a low-range sensor. According to the invention, the accuracy of remote gas detection can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of greenhouse gas detection, and in particular to a carbon dioxide gas detection device, method, electronic equipment and storage medium. Background Art

[0002] Gas detection methods generally fall into two categories: traditional chemical methods and modern spectroscopic methods. Traditional chemical methods have the advantages of direct measurement and high measurement accuracy, but they require pre-sampling of the gas to be tested, which is cumbersome and not time-effective; modern spectroscopic methods, as an optical detection method, have the advantages of strong selectivity, high sensitivity, and fast response time, and are increasingly widely used in environmental testing.

[0003] As an optical detection method, absorption spectroscopy is based on the principle that after a light beam passes through the gas to be tested, the light intensity is weakened by its absorption, and the quantitative analysis of the gas can be completed based on the intensity of the absorbed light. Since the emergence of laser technology in the 1960s, laser absorption spectroscopy has occupied an important position in spectral analysis due to its irreplaceable advantages, as lasers have excellent monochromaticity, coherence and high brightness.

[0004] Based on the advantages of non-dispersive infrared absorption spectroscopy (NDIR), NDIR technology is currently often used as a laser absorption spectroscopy technology in gas detection. When collecting greenhouse gases, a single-range sensor is usually difficult to detect a wide range of gas concentrations, and in the field of remote real-time detection of gas concentrations, it is also impossible to manually switch sensors on-site in real time while ensuring that the incoming gas belongs to exactly the same experimental environment. For the detection of low-concentration carbon dioxide gas, traditional NDIR sensors are difficult to detect carbon dioxide gas at the ppm level. Therefore, the accuracy of remote gas detection cannot be guaranteed based on existing technologies. Summary of the invention

[0005] The object of the present invention is to provide a carbon dioxide gas detection device, method, electronic equipment and storage medium, which can improve the accuracy of remote gas detection.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] A carbon dioxide gas detection device, comprising:

[0008] Gas input unit, used to transmit the CO2 gas to be detected;

[0009] A sensor range switching unit, used to send the CO2 gas to be detected into a sensor of a corresponding range for laser detection according to a diversion instruction, and obtain a detection light signal;

[0010] The remote control detection unit is used to calculate the concentration according to the detection light signal to obtain the CO2 gas concentration at the current moment, and judge the sensor range at the next moment according to the CO2 gas concentration at the current moment, and output the corresponding diversion instruction to realize multi-range gas detection of the same gas source under the same environment; the diversion instruction includes selecting a high-range sensor and selecting a low-range sensor.

[0011] Optionally, the gas input unit specifically includes: a filtering device, an air pump and a flow meter; the input end of the filtering device is connected to a gas source, and the output end of the filtering device, the air pump and the input end of the flow meter are connected in sequence; the output end of the flow meter is also connected to the sensor range switching unit.

[0012] Optionally, the sensor range switching unit specifically comprises: a solenoid valve, a high-range sensor and a low-range sensor; the input end of the solenoid valve is connected to the gas input unit; the output end of the solenoid valve is respectively connected to the CO2 inlet of the high-range sensor and the CO2 inlet of the low-range sensor;

[0013] The gas pool of the high-range sensor is provided with a first light source, a first filter and a first detector; the first light source is provided on the inner wall of the gas pool, and the first filter and the first detector are provided on the inner wall of the gas pool in sequence from left to right according to the transmission direction of the light path;

[0014] The gas pool of the low-range sensor is provided with a second light source, a first reflector, a second reflector, a second filter and a second detector; the second light source is provided on the inner wall of the gas pool, and the second reflector, the first reflector, the second filter and the second detector are provided in sequence on the inner wall of the gas pool according to the transmission direction of the light path;

[0015] The top of the gas pool of the high-range sensor and the low-range sensor are both provided with a CO2 gas outlet; the detectors of the high-range sensor and the low-range sensor are both connected to the remote control detection unit.

[0016] Optionally, the remote control detection unit specifically includes: a data acquisition card and a computer connected in sequence; the data acquisition card is also connected to the detectors of the high-range sensor and the low-range sensor respectively, and the computer is also connected to the solenoid valve.

[0017] The present invention also provides a carbon dioxide gas detection method, which is applied to the above-mentioned device, comprising:

[0018] According to the diversion instruction, the CO2 gas to be detected is sent to the sensor of the corresponding range for laser detection to obtain the detection light signal;

[0019] The concentration is calculated based on the detected light signal to obtain the CO2 gas concentration at the current moment, and the sensor range at the next moment is judged based on the CO2 gas concentration at the current moment, and the corresponding diversion instruction is output to achieve multi-range gas detection of the same gas source under the same environment; the diversion instruction includes selecting a high-range sensor and selecting a low-range sensor.

[0020] Optionally, the process of determining the diversion instruction is:

[0021] The SG smoothing filter method is used to reduce the noise of the detection light signal, and the spectrum data after smoothing filtering is input into the SVM prediction model for concentration prediction to obtain the current gas concentration;

[0022] According to the comparison between the current gas concentration and the preset threshold, the corresponding diversion instruction is output; the preset threshold is 1%, when the current gas concentration is greater than 1%, the diversion instruction for selecting the high-range sensor is output, and when the current gas concentration is less than or equal to 1%, the diversion instruction for selecting the low-range sensor is output;

[0023] Wherein, the SVM prediction model is expressed as:

[0024]

[0025] In the formula, k(x i ,x j ) is the kernel function; b is the bias term; m i , is the support vector.

[0026] The present invention also provides an electronic device, comprising a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to perform the above-mentioned carbon dioxide gas detection method.

[0027] The present invention also provides a computer-readable storage medium storing a computer program, wherein the computer program implements the carbon dioxide gas detection method as described above when executed by a processor.

[0028] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0029] The present invention discloses a carbon dioxide gas detection device, method, electronic device and storage medium. The method includes a gas input unit for transmitting the CO2 gas to be detected; a sensor range switching unit for sending the CO2 gas to be detected into a sensor of a corresponding range for laser detection according to a shunt instruction to obtain a detection light signal; a remote control detection unit for performing concentration calculation according to the detection light signal to obtain the CO2 gas concentration at the current moment, and judging the sensor range at the next moment according to the CO2 gas concentration at the current moment, outputting a corresponding shunt instruction, and realizing multi-range gas detection of the same gas source under the same environment; the shunt instruction includes selecting a high-range sensor and selecting a low-range sensor. The present invention can realize multi-range gas detection of the same gas source under the same environment, and improve the accuracy of remote gas detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0031] Figure 1 This is a structural schematic diagram of a carbon dioxide gas detection device according to the present invention;

[0032] Figure 2 This is a linear fitting diagram of low concentration CO2 gas and voltage signal in this embodiment;

[0033] Figure 3 The original spectrum of the CO2 signal in this embodiment and the spectrum after SG smoothing and noise reduction;

[0034] Figure 4 Schematic diagram of the process of carbon dioxide gas detection method in this embodiment;

[0035] Figure 5 This is the SVM prediction result diagram in this embodiment.

[0036] Reference numerals:

[0037] 1. Filter device; 2. Air pump; 3. Flow meter; 4. Solenoid valve; 5. High-range CO2 sensor air inlet; 6. High-range CO2 sensor air outlet; 7. Low-range CO2 sensor air inlet; 8. Low-range CO2 sensor air outlet; 9. High-range CO2 sensor light source; 10. High-range CO2 sensor gas pool; 11. High-range CO2 sensor filter; 12. High-range CO2 sensor detector; 13. Low-range CO2 sensor light source; 14. First reflector; 15. Data acquisition card; 16. Computer; 17. Low-range CO2 sensor gas pool; 18. Low-range CO2 sensor filter; 19. Low-range CO2 sensor detector; 20. Second reflector. DETAILED DESCRIPTION

[0038] 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.

[0039] The object of the present invention is to provide a carbon dioxide gas detection device, method, electronic equipment and storage medium, which can improve the accuracy of remote gas detection.

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] like Figure 1-Figure 3 As shown, the present invention provides a carbon dioxide gas detection device, comprising:

[0042] The gas input unit is used to transmit the CO2 gas to be detected.

[0043] The sensor range switching unit is used to send the CO2 gas to be detected into the sensor of the corresponding range for laser detection according to the diversion instruction to obtain a detection light signal.

[0044] The remote control detection unit is used to calculate the concentration according to the detection light signal to obtain the CO2 gas concentration at the current moment, and judge the sensor range at the next moment according to the CO2 gas concentration at the current moment, and output the corresponding diversion instruction to realize multi-range gas detection of the same gas source under the same environment; the diversion instruction includes selecting a high-range sensor and selecting a low-range sensor.

[0045] Based on the above device structure, the following more detailed embodiments are provided.

[0046] In this embodiment, a reflective mirror is added in the gas pool, and the position of the radiation light source and the detector is adjusted so that the light source can irradiate the detector after being reflected by the mirror. The filter must use a narrowband filter, which must be able to ensure that the absorption wavelength of the target gas can be covered by this bandwidth range. The amplitude of the detector signal drop can reflect the amount of increase in gas concentration. Broadband sensors usually choose thermal detectors, such as thermopiles or pyroelectric detectors, and the signal size of the detector changes proportionally with the radiation energy. This type of detector has high sensitivity and low temperature coefficient, and has a wide spectral response within the spectral range corresponding to the absorption layer. A reflective mirror is added in the gas pool, and the position of the radiation light source and the detector is adjusted so that the light source can irradiate the detector after being reflected by the mirror.

[0047] The standard gas or sample gas passes through the filter device 1 at the air inlet and enters the front air path of the air pump 2. The air pump 2 pressurizes the source gas and delivers it to the flow meter 3. After detection by the flow meter 3, the exact value of the gas flow is obtained and sent to the host computer for processing. After passing through the flow meter 3, the gas path is split and enters two sensors respectively. The two sensors detect the gas respectively, and the range is switched through the algorithm, thereby realizing wide range detection.

[0048] The system device includes a gas flow diversion system and a gas detection system. The gas flow diversion system includes the carbon dioxide gas passing into the filter device 1 being transported to the gas flow meter 3 through the air pump 2 and then to the solenoid valve 4.

[0049] The gas detection system includes: high-concentration carbon dioxide gas is passed into the high-range CO2 sensor air inlet 5 to fill the high-range CO2 sensor gas pool 10, the radiation laser emitted by the high-range CO2 sensor light source 9 passes through the gas, passes through the high-range CO2 sensor filter 11 and is received by the high-range CO2 sensor detector 12, and transmits the signal to the data acquisition card 15, which converts the optical signal into an electrical signal and transmits it to the computer 16 for data analysis using the Origin spectrum analysis software. If the gas concentration decreases, the computer 16 will control the solenoid valve 4 to switch the gas path, and low-concentration carbon dioxide gas is passed into the low-range CO2 sensor air inlet 7 to fill the low-range CO2 sensor gas pool 17, and the radiation laser emitted by the low-range CO2 sensor light source 13 passes through the second reflector 20 and the first reflector 14 in turn, realizes multiple reflections and passes through the gas, passes through the low-range CO2 sensor filter 18 and is received by the low-range CO2 sensor detector 19, and transmits the signal to the data acquisition card 15, which converts the optical signal into an electrical signal and transmits it to the computer 16 for data analysis using the Origin spectrum analysis software. If the gas concentration increases, repeat the above process.

[0050] The gas detection system also includes a high-range CO2 sensor outlet 6 and a low-range CO2 sensor outlet 8 arranged on the top of the gas pool.

[0051] In addition, if Figure 4-Figure 5 As shown, the present invention also provides a carbon dioxide gas detection method, which is applied to the above-mentioned device, comprising:

[0052] Step 100: according to the diversion instruction, the CO2 gas to be detected is sent to the sensor of the corresponding range for laser detection to obtain a detection light signal.

[0053] Step 200: Calculate the concentration based on the detected light signal to obtain the CO2 gas concentration at the current moment, and judge the sensor range at the next moment based on the CO2 gas concentration at the current moment, and output a corresponding diversion instruction to achieve multi-range gas detection of the same gas source under the same environment; the diversion instruction includes selecting a high-range sensor and selecting a low-range sensor.

[0054] Based on the above operation steps, the following embodiment is provided.

[0055] Based on the above device structure, this embodiment is to solve the problem of low accuracy in low-concentration carbon dioxide gas detection and the gas path problem of multiple sensors in wide-range gas detection. The main implementations of the present invention are: First, a reflector is designed to be added in the gas pool of the NDIR sensor so that the light path is reflected multiple times in the gas pool to increase the optical path. Second, the source of the gas to be tested is the same to ensure the same experimental environment. Through the design of the gas path, the incoming gas of the same gas path is filtered through the air inlet, pressurized by the air pump 2 and transported to the flowmeter 3, and finally diverted through the solenoid valve 4. It can ensure that the source gas is exactly the same. Third, after the gas to be tested passes through two or more sensors, a wide-range detection of the source gas is realized. Through two sensors with different ranges, for the same source gas, the range switching of two or more sensors with different ranges can be realized, thereby realizing real-time range switching, and then realizing wide-range detection.

[0056] When using near-infrared absorption spectroscopy technology to detect gas, the collected spectral signals not only contain effective spectral signals but also have problems such as noise interference and baseline drift. These problems will directly affect the detection results, so it is very important to process the spectral data.

[0057] The SG smoothing filter method is a commonly used noise reduction method in the process of spectral data preprocessing. Its main principle is to fit the data points with a polynomial within a set window width, which can reduce noise while maintaining the shape and width of the spectral data.

[0058] Assume that the original signal S(x) = p(x), x(j) (j = 1, 2, ..., J) is the sampling point of the spectral data, and p(x) is the spectral data corresponding to the sampling point. Assume that the smoothing window width of the SG filter is N (N = 2M + 1), and perform polynomial fitting on the continuous 2M + 1 data points in the original signal S(x) = p(x):

[0059]

[0060] Among them, α k are the coefficients of the polynomial, when the fitting error ε N The minimum value can be determined:

[0061]

[0062] When the error is minimized, the polynomial fitting effect is best. N Take the derivative:

[0063]

[0064] Introducing the Matrix The number of rows in the matrix is ​​2M+1, the number of columns is N+1, let matrix A = X T X.

[0065] set up: Then we have:

[0066]

[0067] The polynomial coefficient α after fitting can be obtained by calculating n The polynomial coefficients are substituted into the least squares fitting, and the smoothing window is moved in the spectral data and this process is repeated to obtain the smoothed spectral data p(x). The SG filter can filter out high-frequency noise, retain low-frequency signals, and ensure that the shape and width of the signal remain unchanged while filtering out noise.

[0068] Lambert-Beer's law shows that in the process of spectral absorption, when a beam of light passes through a gas medium, the gas molecules will absorb the beam, causing the intensity of the outgoing light to decrease. According to the law of conservation of energy:

[0069] τ v +α v =1 (5)

[0070] in, is the transmittance, α v is the absorption rate, I0 is the incident light intensity, and I is the outgoing light intensity.

[0071] According to the Lambert-Beer law, when a monochromatic laser beam with a center frequency of passes through the gas to be measured, the absorbance is proportional to the concentration and absorption thickness of the gas to be measured. Therefore, the transmittance can be further expressed as:

[0072]

[0073] Among them, I0 is the incident light intensity; I is the outgoing light intensity; α v is the gas absorption coefficient; P is the pressure; L is the optical path; C is the concentration of the gas to be measured; S(T) is the spectral line intensity; g(v-v0) is the linear function.

[0074] According to the Lambert-Beer law, the gas concentration expression can be derived:

[0075]

[0076] because Integrating the above formula, we can get:

[0077]

[0078] The absorption curve shows the relationship between absorbance A and optical path L. That is, under the condition of constant pressure, the longer the optical path through the gas of the same concentration, the greater the absorbance and the higher the detectable accuracy.

[0079] Since the optical path lengths of the two sensors are different, according to formula (8), even if the carbon dioxide gas of different concentrations is collected in two sensors with different optical path lengths, the absorbance peaks may be the same. When the gas spectra of different concentrations are transmitted to the computer 16 for processing through the acquisition card, the gas spectra need to be distinguished by concentration to control the solenoid valve 4 to select the gas path. The support vector machine (SVM) algorithm is selected to classify the gas spectrum data.

[0080] It is known that there is a linear relationship between gas concentration and spectral data. Assume that the gas spectral feature data set is A = {(x1, y1), (x2, y2), …, (x n ,y n )}, where i = 1, 2, ..., n, n is the number of samples, x i ∈R p is an input vector of dimension P, representing the spectral data of the i-th sample, y i is the gas concentration of the sample, and the regression model is established as follows:

[0081] f(x)=ω·x+b (9)

[0082] Where ω is a weight vector, its position is perpendicular to the optimal hyperplane, and b is a bias term.

[0083] Introducing the loss function ε, assuming x i Under the accuracy of ε, it can be fitted to y i =f(x i ), then there is a constraint: |y i -f(xi)|≤ε. Introduce slack variables ξ, ξ * , respectively correspond to the amount by which the data point is allowed to deviate upward and downward from the objective function, thereby ensuring that the regression function has a solution. The optimization problem then becomes solving the minimum value problem of function (10) under the constraint of (11).

[0084]

[0085]

[0086] Here C is the penalty factor, and a higher C means a higher penalty for outlier data.

[0087] Introducing Lagrange multipliers Formula (10) can be transformed into an unconstrained Lagrangian function, and the dual form is as follows:

[0088]

[0089] According to the boundary conditions, the dual problem of Lagrangian optimization can be obtained as:

[0090]

[0091] The support vector is m i , The corresponding x when not all zero i Under the constraint boundary conditions, according to the properties of the optimization solution, any (x i ,y i ) into formula (9), we can get the bias term b. By solving the optimal value of the dual problem, the predicted output is as follows:

[0092]

[0093] In the mixed gas spectral data, the original sample space is nonlinear. By using the kernel function k(x i ,x j ), it is possible to map the mixed gas spectrum data from the low-dimensional sample space to the high-dimensional feature space, thereby performing a linear solution. The regression function of the mixed gas nonlinear support vector is obtained as follows:

[0094]

[0095] Different types of SVM models can be established using different kernel functions. Commonly used kernel functions include polynomial kernel functions, Gaussian kernel functions, and linear kernel functions.

[0096] First, the data set is subjected to noise reduction and normalization. The data set is divided into a training set and a prediction set according to the 7:3 principle. Data is read from the training set, and the SVM model is obtained through model training. The prediction result diagram of the SVM model is shown in the figure below. Figure 5 As shown, the correlation coefficient R between the predicted value and the true value 2 =0.989; mean square error MSE = 0.00163.

[0097] The training model is used to predict the data set and determine which concentration interval the spectral intensity belongs to. The host computer calculates the judgment result and controls the solenoid valve 4 to switch the gas path.

[0098] Therefore, in order to achieve wide-range detection in gas detection, in addition to using wide-range sensors, wide-range detection can also be achieved by combining sensors. The beneficial effects and advantages of the present invention are that, by designing the gas circuit, a combination of sensors with multiple ranges can be measured, thereby achieving wide-range detection of gas. (1) Under normal circumstances, the low-range detection range is small and the gas detection accuracy requirements are high. By means of gas flow diversion, the present invention can achieve gas diversion from the same source and achieve high-precision measurement for the low-range gas detection area. (2) To achieve wide-range detection, it is more dependent on the high-range of the sensor. Under such working conditions, the accuracy requirements are relatively low. Therefore, by means of gas circuit diversion, the gas circuit is diverted in the high-range and low-precision scenario to achieve use under high-range. (3) For scenarios where both high precision and high range are required, high-precision wide-range measurement can also be achieved by replacing the sensor and matching the switching program. At this time, a wider range and higher-precision measurement can be achieved by adding an electromagnetic valve 4 and a gas circuit.

[0099] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0100] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A carbon dioxide gas detection device, characterized in that: include: Gas input unit, used to transmit the CO2 gas to be detected; A sensor range switching unit, used to send the CO2 gas to be detected into a sensor of a corresponding range for laser detection according to a diversion instruction, and obtain a detection light signal; The remote control detection unit is used to calculate the concentration according to the detection light signal to obtain the CO2 gas concentration at the current moment, and judge the sensor range at the next moment according to the CO2 gas concentration at the current moment, and output the corresponding diversion instruction to realize multi-range gas detection of the same gas source under the same environment; the diversion instruction includes selecting a high-range sensor and selecting a low-range sensor.

2. The carbon dioxide gas detection device according to claim 1, characterized in that: The gas input unit specifically includes: a filter device, an air pump and a flow meter; the input end of the filter device is connected to a gas source, and the output end of the filter device, the air pump and the input end of the flow meter are connected in sequence; the output end of the flow meter is also connected to the sensor range switching unit.

3. The carbon dioxide gas detection device according to claim 1, characterized in that: The sensor range switching unit specifically includes: a solenoid valve, a high-range sensor and a low-range sensor; the input end of the solenoid valve is connected to the gas input unit; the output end of the solenoid valve is respectively connected to the CO2 inlet of the high-range sensor and the CO2 inlet of the low-range sensor; The gas pool of the high-range sensor is provided with a first light source, a first filter and a first detector; the first light source is provided on the inner wall of the gas pool, and the first filter and the first detector are provided on the inner wall of the gas pool in sequence from left to right according to the transmission direction of the light path; The gas pool of the low-range sensor is provided with a second light source, a first reflector, a second reflector, a second filter and a second detector; the second light source is provided on the inner wall of the gas pool, and the second reflector, the first reflector, the second filter and the second detector are provided in sequence on the inner wall of the gas pool according to the transmission direction of the light path; The top of the gas pool of the high-range sensor and the low-range sensor are both provided with a CO2 gas outlet; the detectors of the high-range sensor and the low-range sensor are both connected to the remote control detection unit.

4. The carbon dioxide gas detection device according to claim 3, characterized in that: The remote control detection unit specifically includes: a data acquisition card and a computer connected in sequence; the data acquisition card is also connected to the detectors of the high-range sensor and the low-range sensor respectively, and the computer is also connected to the solenoid valve.

5. A method for detecting carbon dioxide gas, applied to the device as claimed in any one of claims 1 to 4, characterized in that: include: According to the diversion instruction, the CO2 gas to be detected is sent to the sensor of the corresponding range for laser detection to obtain the detection light signal; The concentration is calculated based on the detected light signal to obtain the CO2 gas concentration at the current moment, and the sensor range at the next moment is judged based on the CO2 gas concentration at the current moment, and the corresponding diversion instruction is output to achieve multi-range gas detection of the same gas source under the same environment; the diversion instruction includes selecting a high-range sensor and selecting a low-range sensor.

6. The carbon dioxide gas detection method according to claim 5, characterized in that: The determination process of the diversion instruction is as follows: The SG smoothing filter method is used to reduce the noise of the detection light signal, and the spectrum data after smoothing filtering is input into the SVM prediction model for concentration prediction to obtain the current gas concentration; According to the comparison between the current gas concentration and the preset threshold, the corresponding diversion instruction is output; the preset threshold is 1%, when the current gas concentration is greater than 1%, the diversion instruction for selecting the high-range sensor is output, and when the current gas concentration is less than or equal to 1%, the diversion instruction for selecting the low-range sensor is output; Wherein, the SVM prediction model is expressed as: In the formula, k(x i ,x j ) is the kernel function; b is the bias term; m i , is the support vector.

7. An electronic device, characterized in that: It comprises a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to perform the carbon dioxide gas detection method according to any one of claims 5-6.

8. A computer-readable storage medium, characterized in that: It stores a computer program, which, when executed by a processor, implements the carbon dioxide gas detection method as described in any one of claims 5-6.

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