Isotope absorption spectrum-based absolute temperature calculation method, system, device and medium

Abstract

The application relates to an absolute temperature calculation method and system based on an isotopic absorption spectrum line, equipment and a medium, and belongs to the technical field of temperature measurement. The method comprises the following steps: acquiring absorption spectrum lines of gas A and gas B on the same light path under the same light path and a to-be-measured temperature, and characteristic parameters of the gas A and the gas B, wherein the gas A and the gas B are different isotopic gases of the same substance; and obtaining the absolute temperature of the to-be-measured temperature according to the absorption spectrum lines and the characteristic parameters of the gas A and the gas B under the to-be-measured temperature. The method principle discards the traditional electrical temperature measurement principle, directly calculates the absolute temperature of the to-be-measured temperature based on the light absorption intensity of the different isotopic gases of the same substance, and solves the problems in the background art.

Description

Technical Field

[0001] This invention belongs to the field of temperature measurement technology, and specifically relates to a method, system, device, and medium for calculating absolute temperature based on isotope absorption spectra. Background Technology

[0002] In the fields of industrial process control, scientific experimental research, and high-end equipment monitoring, accurate and reliable temperature measurement remains a core challenge. Temperature is obtained using contact temperature measurement tools such as thermistors and thermocouples, which are widely used. However, these tools are susceptible to electromagnetic interference, alteration of the measured field due to physical contact, poor long-term stability, and the need for periodic calibration, leading to poor accuracy. While non-contact infrared thermometry avoids contact, it still relies on the blackbody radiation assumption and emissivity estimation, introducing significant errors.

[0003] To overcome the aforementioned limitations, temperature measurement techniques based on laser absorption spectroscopy have gradually developed in recent years, such as tunable diode laser absorption spectroscopy, which retrieves temperature by measuring gas absorption spectral lines. However, in the process of retrieving and calculating temperature, it is necessary to refer to empirically calibrated temperature values, and it is still impossible to achieve a truly absolute temperature calculation based on isotope absorption spectral lines. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a method, system, device, and medium for calculating absolute temperature based on isotopic absorption spectra.

[0005] The first objective of this application is to provide a method for calculating absolute temperature based on isotopic absorption spectra, including:

[0006] The absorption spectra of gases A and B to the same beam of light at the same optical path and at the temperature to be measured are obtained, as well as the characteristic parameters of gases A and B, wherein gases A and B are different isotopic gases of the same substance.

[0007] The absolute temperature of the target temperature is obtained based on the absorption spectra and characteristic parameters of gases A and B at the temperature to be measured.

[0008] In a specific embodiment of the present invention, the characteristic parameters include the measurement parameters during measurement, the absorption line intensity of the gas at the reference temperature, and the energy level of the gas transition to the lower state.

[0009] In a specific embodiment of the present invention, the measurement parameters include the molar concentration of gas A in the closed space, the molar concentration of gas B in the closed space, the pressure of the closed space during measurement, and the optical path length during measurement.

[0010] In a specific embodiment of the present invention, obtaining the absolute temperature of the temperature to be measured based on the absorption spectra and characteristic parameters of gas A and gas B at the temperature to be measured includes:

[0011] Based on the absorption spectra of gas A and gas B at the temperature to be measured, calculate the light absorption intensity of gas A and gas B at the temperature to be measured, respectively.

[0012] Calculate the ratio of the light absorption intensity of gas A and gas B at the temperature to be measured;

[0013] The absolute temperature of the temperature to be measured is calculated based on the ratio of light absorption intensity at the temperature to be measured and the characteristic parameters.

[0014] In a specific embodiment of the present invention, the formula for calculating the absolute temperature is as follows:

[0015]

[0016] in, R ( T Let D be the ratio of the light absorption intensities of gas A and gas B, and let D be the abundance ratio of gas A and gas B. It is Planck's constant. Boltzmann's constant, c The speed of light in a vacuum is expressed in cm / s. T The calculated absolute temperature is expressed in Kelvin (K). T 0 is the reference temperature in K. S 1( T 0) and S 2( T 0) represent the temperatures of gases A and B, respectively. T Standard line strength below 0 These are the lower-level transition energies of gases A and B, respectively, in cm⁻¹. -1 , , These are the partition functions for isotopic gases A and B, respectively.

[0017] The second objective of this invention is to provide an absolute temperature calculation system based on isotopic absorption spectra, comprising:

[0018] Acquisition module: used to acquire the absorption spectra of gas A and gas B to the same beam of light at the same optical path and the temperature to be measured, as well as the characteristic parameters of gas A and gas B, wherein gas A and gas B are different isotopic gases of the same substance;

[0019] Calculation module: Used to obtain the absolute temperature of the temperature to be measured based on the absorption spectra and characteristic parameters of gas A and gas B at the temperature to be measured.

[0020] In a specific embodiment of the present invention, the computing module includes a first computing module and a second computing module;

[0021] The first calculation module is used to calculate the light absorption intensity of gas A and gas B at the temperature to be measured, based on the absorption spectra of gas A and gas B at the temperature to be measured; it is also used to calculate the ratio of the light absorption intensity of gas A and gas B at the temperature to be measured.

[0022] The second calculation module is used to calculate the absolute temperature of the temperature to be measured based on the ratio of light absorption intensity at the temperature to be measured and characteristic parameters.

[0023] A third object of the present invention is to provide an electronic device comprising: a processor coupled to a memory;

[0024] The memory is used to store computer programs;

[0025] The processor is configured to execute the computer program stored in the memory, so that the electronic device performs the method as described.

[0026] A fourth object of the present invention is to provide a computer-readable storage medium storing a program or instructions that, when executed on a computer, cause the computer to perform the method described thereon.

[0027] A fifth objective of this invention is to provide a computer program product comprising a computer program / instructions that, when executed by a processor, implement the method described herein.

[0028] The beneficial effects of this invention are:

[0029] The present invention relates to an absolute temperature calculation method, system, device, and medium based on isotope absorption spectra. The calculation method abandons the traditional electrical temperature measurement principle and directly calculates the absolute temperature of the target temperature based on the light absorption intensity of different isotope gases of the same substance, thus solving the problems in the background technology.

[0030] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A flowchart of an absolute temperature calculation method based on isotopic absorption lines according to an embodiment of the present invention is shown;

[0033] Figure 2 The method of obtaining according to an embodiment of the present invention is shown. 13 CH4 and 12 Characteristic absorption spectrum of CH4 to laser;

[0034] Figure 3 A framework diagram of an absolute temperature calculation system based on isotopic absorption spectra according to an embodiment of the present invention is shown.

[0035] Figure 4 A frame diagram of an electronic device according to an embodiment of the present invention is shown;

[0036] In the diagram: 10, acquisition module; 20, calculation module; 300, electronic device; 301, processor; 302, memory. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] like Figure 1 As shown, a method for calculating absolute temperature based on isotopic absorption spectra according to certain embodiments of the present invention includes:

[0039] S1. Obtain the absorption spectra of gas A and gas B to the same beam of light at the same optical path and the temperature to be measured, as well as the characteristic parameters of gas A and gas B, wherein gas A and gas B are different isotopic gases of the same substance.

[0040] S2. Based on the absorption spectra and characteristic parameters of gases A and B at the temperature to be measured, the absolute temperature of the temperature to be measured is obtained.

[0041] In some embodiments of the present invention, in step S1, in order to ensure that the acquired data is at the same optical path distance from the light source, gas A and gas B can be filled into the same sealed space and laser scanning can be performed simultaneously.

[0042] Alternatively, gas A and gas B can be successively filled into the same sealed space and laser scanned sequentially.

[0043] In some embodiments of the present invention, in step S1, the characteristic parameters include the measurement parameters during measurement, the absorption line strength of the gas at the reference temperature, and the low-level energy of the gas transition.

[0044] The measurement parameters include the molar concentration of gas A in the closed space, the molar concentration of gas B in the closed space, the pressure of the closed space during measurement, and the optical path length during measurement.

[0045] In some embodiments of the present invention, step S2 includes:

[0046] S2-1. Based on the characteristic peaks in the absorption spectra of gases A and B at the temperature to be measured, calculate the light absorption intensity of gases A and B at the temperature to be measured, respectively. The area of ​​the characteristic peaks in the absorption spectrum is calculated to obtain the area of ​​light absorption intensity. Using the area of ​​light absorption intensity to measure the light absorption intensity can further improve the detection accuracy.

[0047] S2-2, Calculate the ratio of the light absorption intensity of gas A and gas B at the temperature to be measured;

[0048] S2-3. Based on the ratio of light absorption intensity at the temperature to be measured and the characteristic parameters, the absolute temperature of the temperature to be measured is calculated.

[0049] In some embodiments of the present invention, the formula for calculating the absolute temperature is shown in equation (1):

[0050] (1)

[0051] , These are the partition functions for isotopic gas A and gas B, respectively. They can be calculated using conventional thermodynamics based on the specific isotopic gas, and this invention does not impose any specific limitations on them.

[0052] For heavy atoms (such as) 13 C, ¹ 8 Isotopes of O, in conventional thermodynamic calculations, Since it is approximately 1, equation (1) simplifies to equation (2):

[0053] (2)

[0054] In equations (1)-(2), R (T Let D be the ratio of the light absorption intensities of gas A and gas B, and let D be the abundance ratio of gas A and gas B. h This is Planck's constant, with a value of 6.626 × 10⁻⁶. -34 , Boltzmann's constant, c The speed of light in a vacuum is 3.8 × 10⁻⁶. 8 m / s, which is equivalent to 3.8 × 10 10 cm / s, T The calculated absolute temperature is expressed in Kelvin (K). T 0 is the reference temperature. S 1( T 0) and S 2( T 0) represent the temperatures of gases A and B, respectively. T The standard linear intensity at 0°C (a known value obtained from an existing gas performance parameter database) is generally... T 0 represents 25°C, which is equivalent to 25 + 273.15 Kelvin. These are the lower-level transition energies of gases A and B, respectively, in cm. -1 The data for both can be calculated based on existing gas transition theories, and the calculation process will not be elaborated here. , These are the partition functions for isotopic gases A and B, respectively.

[0055] In some embodiments of the present invention, for isotopes of light atoms (such as deuterium), It cannot be approximated as 1, and the formula for calculating the absolute temperature still follows formula (1).

[0056] In some embodiments of the present invention, the sensitivity and relative sensitivity of temperature measurement based on the ratio of the light absorption intensity of two isotopes are shown in equations (3) and (4), respectively:

[0057] (3)

[0058] (4)

[0059] Equation (3) yields the sensitivity, and Equation (4) yields the relative sensitivity, i.e. Relative sensitivity means the relative change in the ratio of absorption line intensities R when the temperature changes by a unit relative change (e.g., 1%), expressed in %. In equations (3)-(4) R Let be the ratio of the light absorption intensities of gas A and gas B, where the symbol " " is the partial derivative operator.

[0060] The absolute temperature of the temperature to be measured is calculated according to the calculation method in the above embodiment. The specific process is as follows:

[0061] The obtained gas A (example location is) 13 CH4) and gas B (for example, CH4) and gas B 12 CH4) The characteristic absorption spectrum of laser light, such as Figure 2 As shown.

[0062] 13 CH4 and 12 CH4 S 1 ( T 0=25℃) and S 2 ( T (0=25℃) are respectively 1.6×e -27 and 1.486×e -23 .

[0063] 13 CH4 and 12 CH4 They are 333.33cm respectively. -1 and 31.4424cm -1 .

[0064] according to Figure 2 Calculation obtained R ( T The measured value of ). And Given the values, the absolute temperature is calculated by substituting the above data into equation (1). T = ,in, In R for R ( T The measured value of ).

[0065] like Figure 3 As shown, an absolute temperature calculation system based on isotopic absorption spectra includes:

[0066] Acquisition module 10: used to acquire the absorption spectra of gas A and gas B to the same beam of light at the same optical path and the temperature to be measured, as well as the characteristic parameters of gas A and gas B, wherein gas A and gas B are different isotopic gases of the same substance;

[0067] Calculation module 20: used to obtain the absolute temperature of the temperature to be measured based on the absorption spectra and characteristic parameters of gas A and gas B at the temperature to be measured.

[0068] In some embodiments of the present invention, the computing module 20 includes a first computing module and a second computing module;

[0069] The first calculation module is used to calculate the light absorption intensity of gas A and gas B at the temperature to be measured, based on the absorption spectra of gas A and gas B at the temperature to be measured; it is also used to calculate the ratio of the light absorption intensity of gas A and gas B at the temperature to be measured.

[0070] The second calculation module is used to calculate the absolute temperature of the temperature to be measured based on the ratio of light absorption intensity at the temperature to be measured and characteristic parameters.

[0071] like Figure 4 As shown, in some embodiments of the present invention, an electronic device is provided, the electronic device 300 including: a processor 301 coupled to a memory 302;

[0072] The memory 302 is used to store computer programs;

[0073] The processor 301 is configured to execute the computer program stored in the memory 302, so that the electronic device performs the method described in the above embodiments.

[0074] In some embodiments of the present invention, a computer-readable storage medium is provided that stores a program or instructions that, when executed on a computer, cause the computer to perform the methods described in the above embodiments.

[0075] According to embodiments of the present invention, the computer-readable storage medium may be a non-volatile computer-readable storage medium, such as including but not limited to: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In the present invention, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, electronic device, or apparatus.

[0076] In some embodiments of the present invention, a computer program product is provided, including a computer program / instructions that, when executed by a processor, implement the methods described in the above embodiments.

[0077] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for calculating absolute temperature based on isotopic absorption spectra, characterized in that, include: The absorption spectra of gases A and B to the same beam of light at the same optical path and at the temperature to be measured are obtained, as well as the characteristic parameters of gases A and B, wherein gases A and B are different isotopic gases of the same substance. Based on the absorption spectra and characteristic parameters of gases A and B at the temperature to be measured, the absolute temperature of the temperature to be measured is obtained, including: Based on the characteristic peaks in the absorption spectra of gas A and gas B at the temperature to be measured, calculate the light absorption intensity of gas A and gas B at the temperature to be measured, respectively. Calculate the ratio of the light absorption intensity of gas A and gas B at the temperature to be measured; The absolute temperature of the temperature to be measured is calculated based on the ratio of light absorption intensity at the temperature to be measured and the characteristic parameters. The characteristic parameters include the measurement parameters during measurement, the absorption line intensity of the gas at the reference temperature, and the energy level of the gas transition to the lower state. The measurement parameters include the molar concentration of gas A in the closed space, the molar concentration of gas B in the closed space, the pressure of the closed space during measurement, and the optical path length during measurement. The formula for calculating the absolute temperature is as follows: in, R ( T Let D be the ratio of the light absorption intensities of gas A and gas B, and let D be the abundance ratio of gas A and gas B. It is Planck's constant. Boltzmann's constant, c The speed of light in a vacuum is expressed in cm / s. T The calculated absolute temperature is expressed in Kelvin (K). T 0 represents the reference temperature, in Kelvin (K). S 1( T 0) and S 2( T 0) represent the temperatures of gases A and B, respectively. T Standard line strength below 0 These are the lower-level transition energies of gases A and B, respectively, in cm⁻¹. -1 , , These are the partition functions for isotopic gases A and B, respectively.

2. An absolute temperature calculation system based on isotopic absorption spectra, characterized in that, Implementing the absolute temperature calculation method based on isotope absorption lines as described in claim 1, comprising: Acquisition module: used to acquire the absorption spectra of gas A and gas B to the same beam of light at the same optical path and the temperature to be measured, as well as the characteristic parameters of gas A and gas B, wherein gas A and gas B are different isotopic gases of the same substance; Calculation module: Used to obtain the absolute temperature of the temperature to be measured based on the absorption spectra and characteristic parameters of gas A and gas B at the temperature to be measured.

3. The absolute temperature calculation system based on isotopic absorption lines according to claim 2, characterized in that, The computing module includes a first computing module and a second computing module; The first calculation module is used to calculate the light absorption intensity of gas A and gas B at the temperature to be measured, based on the absorption spectra of gas A and gas B at the temperature to be measured; it is also used to calculate the ratio of the light absorption intensity of gas A and gas B at the temperature to be measured. The second calculation module is used to calculate the absolute temperature of the temperature to be measured based on the ratio of light absorption intensity at the temperature to be measured and characteristic parameters.

4. An electronic device, characterized in that, include: Processor, the processor being coupled to memory; The memory is used to store computer programs; The processor is configured to execute the computer program stored in the memory, so that the electronic device performs the method as described in claim 1.

5. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a program or instructions that, when executed on a computer, cause the computer to perform the method as described in claim 1.

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

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