High-speed temperature measurement and laser gas sensing concentration correction method and product

Abstract

The application discloses a high-speed temperature measurement and laser gas sensing concentration correction method and product. In view of the problem that the response time of the prior art temperature measurement method is slow and the requirement of a TDLAS high-speed measurement system for rapid correction cannot be met, thereby errors are caused. The method is based on a three-dimensional ultrasonic wind device and a laser gas concentration measurement device, and the method comprises the following steps: acquiring an initial temperature and an initial air pressure of a to-be-measured point, and obtaining an initial ppmV of water vapor of the to-be-measured point by using the laser gas concentration measurement device; inputting the ppmV into the three-dimensional ultrasonic wind device, and acquiring a virtual temperature of the to-be-measured point by using the three-dimensional ultrasonic wind device; converting the virtual temperature into an air temperature based on the ppmV; inputting the air temperature into the laser gas concentration measurement device, and measuring a gas absorption curve by using the laser gas concentration measurement device; and correcting the ppmV based on the air temperature and the gas absorption curve. The accuracy of high-speed gas concentration measurement is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser gas detection, in particular to a high-speed temperature measurement method. BACKGROUND

[0002] The research on carbon source and carbon sink of ecological system is one of the core problems of global carbon cycle research. The carbon and water cycle rules of ecological system change greatly with climate change. How climate change affects the process of carbon, water flux and water use efficiency of ecological system is a hot research topic at home and abroad. As a new generation of carbon and water observation method, the eddy covariance flux observation method promotes the research process of carbon cycle of terrestrial ecological system. The key of the eddy covariance observation equipment is the measurement of gas flux, which needs to be observed in cooperation with three-dimensional ultrasonic wind equipment and laser gas concentration measurement equipment.

[0003] The measurement of carbon and water flux of ecological environment requires high-speed gas concentration measurement. The measurement frequency of CO2 and H2O gas is at least 10 Hz. Therefore, TDLAS technology is used for gas concentration measurement. The TDLAS technology measurement needs temperature correction. However, the current temperature measurement method has slow response time, which cannot meet the rapid correction requirement of TDLAS high-speed measurement system, thereby causing errors. SUMMARY

[0004] The present application provides a high-speed temperature measurement and laser gas sensing concentration correction method and product, which aims to solve the problem of slow response time of the temperature measurement method in the prior art, which cannot meet the rapid correction requirement of TDLAS high-speed measurement system, thereby causing errors.

[0005] In a first aspect, a high-speed temperature measurement and laser gas sensing concentration correction method is provided. The method is based on three-dimensional ultrasonic wind equipment and laser gas concentration measurement equipment. The method comprises the following steps:

[0006] In step S1, the initial temperature and initial air pressure of the to-be-measured point are obtained, and the initial ppmV of water vapor of the to-be-measured point is obtained by using the laser gas concentration measurement equipment.

[0007] In step S2, the ppmV is input into the three-dimensional ultrasonic wind equipment, the virtual temperature of the to-be-measured point is obtained by using the three-dimensional ultrasonic wind equipment, and the virtual temperature is converted into air temperature based on the ppmV. The air temperature is input into the laser gas concentration measurement equipment, and the gas absorption curve is measured by using the laser gas concentration measurement equipment. The ppmV is corrected based on the air temperature and the gas absorption curve.

[0008] In step S3, step S2 is repeated.

[0009] In the above scheme, step S2 comprises:

[0010] The virtual temperature is converted into air temperature based on the ppmV, and the conversion formula is:

[0011]

[0012] In the formula, T s represents virtual temperature, T represents air temperature, and P represents air pressure;

[0013] The ppmV is corrected based on the air temperature and the gas absorption curve, and the correction formula is:

[0014]

[0015] In the formula, N represents the number of atmospheric molecules per unit volume, S represents the absorption intensity of the gas to light of a certain frequency, γ L is the half-height half-width of the Lorentz-type spectrum, I0 represents the intensity of the incident light, and I t represents the intensity of the outgoing light that has passed through the gas chamber, and L represents the absorption path length of the light through the gas to be measured.

[0016] The absorption intensity S is only related to the air temperature T, the data of the absorption intensity S and the air temperature T are queried from the HITRAN database, the correction coefficient is obtained by looking up the table or fitting function S(T) according to the measured air temperature T, and thus the ppmV is corrected.

[0017] The second aspect is a carbon and water flux measuring instrument, comprising: the carbon and water flux measuring instrument comprises a three-dimensional ultrasonic wind device and a laser gas concentration measuring device, a plurality of pairs of transducers are arranged on the three-dimensional ultrasonic wind device, and the transducers are integrated with transmitting and receiving ultrasonic signals; wherein the midpoints of the connecting lines of the plurality of pairs of transducers coincide, and the midpoints of the connecting lines are located at the center of the three-dimensional ultrasonic wind device.

[0018] The midpoints of the connecting lines of the plurality of pairs of transducers coincide with the center point of the gas chamber of the laser gas concentration measuring device.

[0019] The third aspect is a carbon and water flux measuring system, comprising:

[0020] The ppmV acquisition module is configured to obtain the initial ppmV of the water vapor to be measured by using the laser gas concentration measuring device according to the initial temperature and the initial air pressure, and correct the ppmV based on the air temperature and the gas absorption curve.

[0021] The air temperature acquisition module is configured to obtain the virtual temperature of the point to be measured by using the three-dimensional ultrasonic wind device, and convert the virtual temperature into the air temperature based on the ppmV.

[0022] The fourth aspect is a computer device, comprising a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to realize the steps of the method described above.

[0023] In a fifth aspect, a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method as described above.

[0024] In a sixth aspect, a computer program product comprises computer programs / instructions which, when executed by a processor, implement the steps of the method as described above.

[0025] Compared with the prior art, the present application has at least the following beneficial effects:

[0026] Based on further analysis and research on the problems of the prior art, the present application realizes that the measurement of the carbon and water flux of the ecological environment requires high-speed gas concentration measurement, and the measurement frequency of CO2 and H2O gas should reach at least 10 Hz. Therefore, TDLAS technology is used for gas concentration measurement. However, TDLAS technology requires temperature to be provided for real-time correction when measuring gas concentration. The measurement frequency of TDLAS needs to reach 10 Hz, and the traditional temperature measurement is in seconds or longer. Only through the relatively slow measurement value of temperature can the high-speed measurement system be corrected, and it is inevitable to produce errors. Therefore, the present method uses three-dimensional ultrasonic wind to measure virtual temperature, and then converts the virtual temperature to temperature through the present method to obtain high-speed gas temperature, i.e. air temperature, and then performs temperature correction of TDLAS, thereby providing a high-speed temperature correction method and improving the accuracy of gas measurement.

[0027] The present application also provides a design method that the center of the optical coupling gas chamber of TDLAS coincides with the detection center of the three-dimensional ultrasonic wind, so as to avoid the difference between the two detection positions, which causes the inconsistency of the high-frequency measurement phase and leads to the confusion of the corrected data. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 A flowchart of a high-speed temperature measurement and laser gas sensing concentration correction method provided by an embodiment of the present application.

[0029] Figure 2 A structural schematic diagram of a carbon and water flux measurement instrument provided by an embodiment of the present application.

[0030] Figure 3 A module architecture block diagram of a carbon and water flux measurement system provided by an embodiment of the present application.

[0031] Figure 4 An internal structure diagram of a computer device in an embodiment. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0033] In the description of the present application: unless otherwise specified, the meaning of "a plurality of" is two or more. The expressions "including", "containing", "having" and the like also mean "not limited to" (some units, components, materials, steps, etc.).

[0034] Noun explanation:

[0035] TDLAS, English name Tunable Diode Laser Absorption Spectroscopy, tunable diode laser absorption spectroscopy technology.

[0036] VT, English name Virtual Temperature, virtual temperature, under the condition of equal air pressure, the temperature that the dry air should have when the density of the dry air and the density of the wet air are equal.

[0037] T s , English name sonic temperature, sonic temperature, virtual temperature obtained by three-dimensional ultrasonic wind measurement and calculation.

[0038] The research on carbon source and carbon sink of ecological system is one of the core problems of global carbon cycle research. The carbon and water cycle rules of ecological system change greatly with climate change. How climate change affects the process of carbon, water flux and water use efficiency of ecological system is a hot research topic at home and abroad. As a new generation of carbon and water observation method, the eddy covariance flux observation method has promoted the research process of terrestrial ecosystem carbon cycle. The key of eddy covariance observation equipment is the measurement of gas flux, which needs to be observed in combination with three-dimensional ultrasonic wind equipment and laser gas concentration measurement equipment.

[0039] The measurement of carbon and water flux of ecological environment requires high-speed gas concentration measurement. The measurement frequency of CO2 and H2O gas should reach at least 10 Hz. Therefore, TDLAS technology is used for gas concentration measurement. TDLAS technology measurement needs temperature correction, but the current temperature measurement method has slow response time and cannot meet the correction error of TDLAS high-speed measurement system.

[0040] The three-dimensional ultrasonic wind sensor uses a transducer to transmit and receive ultrasonic signals. The time of flight of ultrasonic signals between a pair of transducers is directly related to the wind vector component parallel to the transducer axis. The time difference between the outgoing and returning sound signals and the distance between the transducers are used to calculate the wind vector component along each group of transducer axes.

[0041] TDLAS laser gas sensor output modulated laser beam, irradiated to the measured atmosphere, by gas absorption laser corresponding wavelength energy, judge the absorption curve strength inverse calculation of gas concentration. Can realize high speed gas measurement (10 Hz and above frequency).

[0042] TDLAS laser gas measurement, the need for real-time measurement of the temperature of the measured gas temperature correction, so generally use thermistor, thermocouple method for temperature measurement, and then temperature input TDLAS system for temperature correction, get accurate gas concentration value.

[0043] TDLAS technology to measure gas concentration, need to provide real-time correction temperature. TDLAS measurement frequency needs to reach 10 Hz, the traditional temperature measurement for seconds or more time, only through the relative slow measurement of temperature correction of high speed measurement system, inevitably produce error.

[0044] Therefore, the present application uses three-dimensional ultrasonic wind for ultrasonic virtual temperature measurement, then through the method provided by the present application for virtual temperature to temperature conversion, get high speed gas temperature, namely air temperature after TDLAS temperature correction, provides a kind of high speed temperature correction method, improves gas measurement accuracy.

[0045] In one embodiment, reference Figure 1 A high-speed temperature measurement and laser gas sensing concentration correction method, the method is based on three-dimensional ultrasonic wind equipment and laser gas concentration measurement equipment, comprising:

[0046] Step S1, obtain the initial temperature and initial air pressure of the measured point, and obtain the initial ppmV of the measured point water vapor by using the laser gas concentration measurement device;

[0047] Step S2, input ppmV into the three-dimensional ultrasonic wind device, obtain the virtual temperature of the measured point by using the three-dimensional ultrasonic wind device, convert the virtual temperature to air temperature based on ppmV; input the air temperature into the laser gas concentration measurement device, measure the gas absorption curve by using the laser gas concentration measurement device, and correct ppmV based on the air temperature and the gas absorption curve;

[0048] Step S3, repeat step S2.

[0049] In one embodiment, step S2 comprises:

[0050] Convert the virtual temperature to air temperature based on ppmV, and the conversion formula is:

[0051]

[0052] In the formula, T sVirtual temperature, T represents air temperature, P represents air pressure

[0053] Based on air temperature and gas absorption curve correction ppmV, correction formula is:

[0054]

[0055] In the formula, N represents the atmospheric molecules per unit volume, S represents the absorption intensity of a certain frequency of light by the gas, γ L Half width of Lorentz type spectrum line, I0 represents incident light intensity, I t Indicates the exit light intensity through the gas chamber, L represents the absorption path length of the light through the measured gas;

[0056] Wherein, the absorption intensity S is only related to air temperature T, the absorption intensity S and air temperature T are inquired from the HITRAN database, the correction coefficient is obtained by looking up the table or fitting function S (T) according to the measured air temperature T, so as to correct ppmV.

[0057] Three-dimensional ultrasonic wind sensor adopts transducer to transmit and receive ultrasonic signals, the flight time of ultrasonic signals between a pair of transducers is directly related to the wind vector component parallel to the transducer axis. The time difference between the outgoing and returning sound signals, and the distance between the transducers, are used to calculate the wind vector component along each group of transducer axes.

[0058] The flight time of ultrasonic wave along the positive direction of transducer axis is as follows:

[0059]

[0060] The flight time of ultrasonic wave along the negative direction of transducer axis is as follows:

[0061]

[0062] Wherein, t o Indicates the flight time of ultrasonic wave along the positive direction of transducer axis; t b Indicates the flight time of ultrasonic wave along the negative direction of transducer axis; u a Indicates the wind vector in the direction of transducer axis; d indicates the distance between the transducers; c indicates the sound velocity.

[0063] The sound velocity can be calculated by the positive and negative flight times:

[0064]

[0065] After obtaining c, the calculation formula of T s Is as follows:

[0066]

[0067] where γ d represents the ratio of the specific heat of constant pressure dry air to the specific heat of constant volume dry air, which is 1.4; R d represents the volume constant of dry air, which is 287.04 JK-1kg-1;

[0068] T s is related to humidity, which is represented by the following formula:

[0069]

[0070] where T s represents the virtual temperature of ultrasound; T represents the air temperature; e represents the water vapor partial pressure; and P represents the total gas pressure. P is the atmospheric pressure in the ecological system, which is generally 1 atm.

[0071] Therefore, if e is obtained, the conversion from the virtual temperature to the air temperature can be performed.

[0072] The water vapor measurement of TDLAS can obtain the ppmV concentration of water vapor, and the conversion formula of ppmV and e is:

[0073]

[0074] When P is 1 atm, it can be simplified as:

[0075]

[0076] Therefore, the conversion formula of T and T s is:

[0077]

[0078] For the case of 1 atm, the formula of the conversion of the virtual temperature of ultrasound to the temperature is obtained.

[0079] In actual application, the TDLAS device also needs to be temperature-corrected, and the temperature correction of this part is:

[0080] According to the Beer-Lambert absorption law, the formula for calculating the volume ratio of gas molecules is:

[0081]

[0082] where ppmV represents the gas concentration, which is defined as the ratio of the number of molecules of the gas component to be measured to the total number of gas molecules in a unit cross-sectional area, I0 represents the incident light intensity, I t represents the outgoing light intensity after passing through the gas chamber, α(θ) represents the absorption coefficient, and L represents the absorption path length of the measured gas through which the light passes. I0, I t, then ppmV can be obtained.

[0083] For α(θ), which is generally a Lorentz-type spectrum, the absorption coefficient can be written as:

[0084]

[0085] Where N represents the number of atmospheric molecules per unit volume, S represents the absorption intensity of the gas to a certain frequency of light, and γ L represents the half-height half-width of the Lorentz-type spectrum.

[0086] When the incident laser frequency is equal to the gas absorption frequency, i.e., θ0:

[0087]

[0088] Where, Where n is the value corresponding to the absorption wavelength obtained by querying the HITRAN database, and γ L The absorption curve that can be measured by the TDLAS device is determined.

[0089] Combining the above formulas, finally:

[0090]

[0091] In the above formula, the parameters related to temperature and pressure are: absorption intensity S (only related to temperature), and atmospheric molecule number N. Among them, N is directly related to temperature and pressure, and the temperature T and pressure P of the atmosphere to be measured need to be measured; S needs to query the absorption intensity and temperature T data from the HITRAN database, and then according to the measured T, the correction coefficient is obtained by looking up the table or fitting function S(T), so that the temperature and pressure correction of TDLAS is completed.

[0092] In this embodiment, during actual measurement, the initial air temperature and air pressure need to be provided, which can be measured by a conventional temperature sensor and air pressure sensor, and then input into the TDLAS correction to obtain the accurate water vapor ppmV concentration value, and then according to the water vapor ppmV value, the measured T s is converted to T, and then the T is input into the TDLAS device for temperature correction.

[0093] The specific process is shown in Figure 1 After inputting the initial correction, the system runs and can be corrected according to the TDLAS and three-dimensional ultrasonic wind device, so as to realize the temperature correction of high-speed gas measurement.

[0094] In this embodiment, the initial temperature and air pressure sensor can be measured by a sensor that can measure the parameter, and the application does not specify the specific sensing form.

[0095] The embodiment utilizes three-dimensional ultrasonic wind to perform ultrasonic virtual temperature measurement, converts virtual temperature to temperature, and performs temperature correction of TDLAS. After initial correction is provided by external temperature and pressure, the system can perform high-speed correction; the innovative high-speed temperature correction method for high-speed gas measurement improves gas measurement accuracy, upgrades traditional slow-speed temperature correction to high-speed temperature correction, and has great significance for high-speed gas concentration measurement accuracy.

[0096] In one embodiment, the reference Figure 2 provides a carbon flux measuring instrument, comprising: the carbon flux detection instrument comprises a three-dimensional ultrasonic wind device and a laser gas concentration measuring device, a plurality of pairs of transducers are arranged on the three-dimensional ultrasonic wind device, and the transducers integrate transmitting and receiving ultrasonic signals; wherein the connecting line midpoint of the plurality of pairs of transducers coincides exactly, and the connecting line midpoint is located at the center of the three-dimensional ultrasonic wind device.

[0097] The connecting line midpoint of the plurality of pairs of transducers coincides exactly with the center point of the gas chamber of the laser gas concentration measuring device.

[0098] After the temperature correction method is determined, the optical coupling gas chamber of TDLAS needs to be designed as Figure 2 to ensure that the center points detected by both sides coincide, and to ensure that the virtual temperature position measured by the three-dimensional ultrasonic wind coincides with the temperature position corrected by TDLAS. Because turbulence in air is not uniform, the size of air mass is from sub-meters to meters. The traditional carbon flux instrument and the three-dimensional ultrasonic wind are two devices arranged at adjacent positions, and the measurement points do not coincide, which causes deviation between the measured temperature data and the carbon gas concentration measurement point that needs to be corrected. For high-frequency data, the phase may be chaotic after data correction, so the center point coincidence design is adopted.

[0099] The three-dimensional ultrasonic wind has six ultrasonic transducers, which are A-F. According to the positions of A-F, an inscribed circle is formed. According to the inscribed circle faces where A, B, and C are located as the bottom of the cylinder, and the inscribed circle faces where D, E, and F are located as the top of the cylinder, a cylinder is formed. Assuming that the radius of the top face of the cylinder is r and the height is h, according to the rectangular coordinate system xyz, the positions of the six probes are designed as: A(r, 0, 0), D(-r, 0, h),

[0100] Among them, the probe A and the probe D, the probe B and the probe E, and the probe C and the probe F are a pair of probes, the connecting line midpoint of which coincides exactly, the connecting line midpoint coincides with the center of the three-dimensional ultrasonic wind device, and also coincides with the center of the optical coupling gas chamber of TDLAS. In the three-dimensional ultrasonic wind device, when the connecting line center of any two transducers coincides exactly with the center of the device, the two transducers are defined as a pair of transducers.

[0101] The TDLAS optical coupling gas chamber has a laser emitting end O and a laser receiving end O', and the laser receiving end is located on the top surface. The practical significance is that when testing outdoors, the laser receiving end faces the ground direction, avoiding the influence of direct sunlight. The OO' group forms a gas chamber with an optical path of h, and the temperature correction point is the center position of the gas chamber;

[0102] The detection points of the two systems coincide at point This position is the center point of three-dimensional ultrasonic wind detection, and is also the temperature correction point of the TDLAS optical coupling gas chamber, so that the high-frequency signal measurement of the two can be synchronized and corrected, avoiding the phase confusion of the high-frequency signal measurement position points. On this basis, the position of the ultrasonic transducer is rotated and the optical path of the TDLAS gas chamber is lengthened, as long as the center points of the three-dimensional ultrasonic wind and the TDLAS gas chamber coincide.

[0103] In the embodiment, as long as the center points of the three-dimensional ultrasonic wind and the TDLAS gas chamber coincide, the position change based on the coincidence, such as rotating the position of the ultrasonic transducer and lengthening the optical path of the TDLAS gas chamber, are all within the protection scope of the application.

[0104] In the embodiment, the center points of the three-dimensional ultrasonic wind and the TDLAS gas chamber are designed to coincide, ensuring accurate correction. The embodiment proposes a design method for the center of the TDLAS optical coupling gas chamber to coincide with the center of the three-dimensional ultrasonic wind detection, avoiding the difference between the two detection positions, which causes the phase inconsistency of high-frequency measurement, resulting in chaotic corrected data.

[0105] In one embodiment, a system for measuring carbon flux, as shown in Figure 3 The system includes:

[0106] A ppmV acquisition module for obtaining the initial ppmV of the water vapor to be measured by a laser gas concentration measuring device according to the initial temperature and the initial air pressure; correcting the ppmV based on the air temperature and the gas absorption curve;

[0107] An air temperature acquisition module for obtaining the virtual temperature of the point to be measured by a three-dimensional ultrasonic wind device, and converting the virtual temperature to air temperature based on the ppmV.

[0108] The specific implementation of each module can be referred to the above description of the high-speed temperature measurement and laser gas sensing concentration correction method, which will not be repeated here.

[0109] In one embodiment, a computer device is provided, which can be a terminal, and its internal structure diagram can be as shown in Figure 4As shown in the figure. The computer device includes a processor, a memory, a communication interface, a human-computer interaction interface (for example, a combination of a display and a keyboard, a mouse, or a touch screen, etc.) connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities, the communication interface is used to communicate with external terminals in a wired or wireless manner, and the wireless manner can be achieved through WIFI, operator network, NFC (near field communication) or other technologies. The computer device realizes the above-mentioned one kind of high-speed temperature measurement and laser gas sensing concentration correction method by loading and running computer program.

[0110] Those skilled in the art can understand that, Figure 4 The structure shown in the figure is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the computer device to which the scheme of the present application is applied. The specific computer device can include more or less components than those shown in the figure, or combine certain components, or have a different component arrangement.

[0111] In one embodiment, a computer readable storage medium is also provided, which stores a computer program. The computer program is executed by a processor to implement the steps of the above-mentioned embodiment method.

[0112] In one embodiment, a computer program product is also provided, which includes computer programs / instructions. The computer programs / instructions are executed by a processor to implement the steps of the above-mentioned embodiment method.

[0113] The technical features of the above embodiments can be combined in any way. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

Claims

1. A method for high-speed temperature measurement and laser gas sensing concentration correction, characterized in that, The method is based on a three-dimensional ultrasonic wind device and a laser gas concentration measurement device. The three-dimensional ultrasonic wind device is equipped with multiple pairs of transducers, which integrate the transmission and reception of ultrasonic signals. The midpoint of the line connecting the multiple pairs of transducers coincides and is located at the center of the three-dimensional ultrasonic wind device. The midpoint of the line connecting the multiple pairs of transducers coincides with the center point of the gas chamber of the laser gas concentration measurement device. The method includes: Step S1: Obtain the initial temperature and initial air pressure at the test point, and use a laser gas concentration measurement device to obtain the initial ppmV of water vapor at the test point; where ppmV represents the gas concentration, defined as the ratio of the number of molecules of the gas component to be measured to the total number of gas molecules within a uniform unit cross-sectional area. Step S2: Input ppmV into the three-dimensional ultrasonic wind device, use the three-dimensional ultrasonic wind device to obtain the virtual temperature of the test point, and convert the virtual temperature into air temperature based on ppmV; input the air temperature into the laser gas concentration measurement device, use the laser gas concentration measurement device to measure the gas absorption curve, and correct ppmV based on air temperature and gas absorption curve. Step S3, repeat step S2; Step S2 includes: Based on ppmV, the virtual temperature is converted to air temperature using the following formula: ， In the formula, Indicates a false temperature. Indicates air temperature. Indicates air pressure; Based on air temperature and gas absorption curves, ppmV is corrected using the following formula: ， In the formula, This represents atmospheric molecules per unit volume. It represents the absorption intensity of a gas for light of a specific frequency. The spectral lines are of the Lorentz type, with half the height and half the width at half maximum. Indicates the intensity of the incident light. This indicates the intensity of the emitted light after passing through the air chamber. This indicates the length of the absorption path of the light through the gas being measured. Among them, absorption intensity Only with air temperature Related, query the absorption intensity from the HITRAN database. With air temperature Data, based on the measured air temperature The correction coefficient is obtained by looking up the table or fitting the function S(T), thereby correcting ppmV.

2. A carbon flux measurement system, said system being used to implement the high-speed temperature measurement and laser gas sensing concentration correction method as described in claim 1, characterized in that, include: The ppmV acquisition module is used to obtain the initial ppmV of the water vapor to be measured using a laser gas concentration measurement device based on the initial temperature and initial gas pressure. Correction of ppmV based on air temperature and gas absorption curves; The air temperature acquisition module is used to acquire the virtual temperature of the test point using a three-dimensional ultrasonic wind device, and convert the virtual temperature into air temperature based on ppmV.

3. A computer device, comprising a memory, a processor, and a computer program stored in the memory, characterized in that, The processor executes the computer program to implement the steps of the method of claim 1.

4. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method of claim 1.

5. A computer program product, comprising a computer program or instructions, characterized in that, When the computer program or instructions are executed by a processor, they implement the steps of the method of claim 1.

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