CN112782110A - Calibration device and calibration method for transformer substation infrared temperature measurement and SF6 gas spectrum monitoring - Google Patents
Calibration device and calibration method for transformer substation infrared temperature measurement and SF6 gas spectrum monitoring Download PDFInfo
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Abstract
A calibration device and a calibration method for transformer substation infrared temperature measurement and SF6 gas spectrum monitoring are provided, wherein the calibration device comprises: a high temperature black body radiation source for emitting infrared spectra; the gas cell consists of a sealed gas chamber, an incident window and an exit window which are arranged at two ends of the gas chamber along a light source transmission path, and infrared spectrum emitted by the high-temperature black body radiation source is emitted from the incident window and is emitted from the exit window; a detector for collecting an infrared spectrum emitted through an exit window of the gas cell; and a computer for receiving the spectral data output by the detector, and processing and calculating the spectral data. The calibration device and the calibration method for transformer substation infrared temperature measurement and SF6 gas spectrum monitoring accurately calculate the absorption spectrum line of the gas filled environment by using the vacuum environment and the gas filled environment of the gas pool.
Description
Technical Field
The invention relates to the technical field of spectrum monitoring, in particular to a calibration device and a calibration method for transformer substation infrared temperature measurement and SF6 gas spectrum monitoring.
Background
In recent years, the reliable operation of the power supply system becomes the primary task of the operation and maintenance department of the power equipment as the main artery of national economy, and the heating fault is always the key point and the difficulty in the operation and management process of the equipment, so that the real-time measurement of the temperature of the operation equipment of the transformer substation is a long-standing unsolved problem;
the infrared detection technology is an on-line detection technology integrating a plurality of scientific technologies such as a computer technology, an image technology and a photoelectric imaging technology. The technology is mainly characterized in that the thermal image of an object is displayed by a display according to the characteristics that the temperature of the surface of the object is different and the amount of emitted infrared radiation is different. The non-contact infrared temperature detector realizes remote object detection through an infrared detection technology, provides safety guarantee for detection of some dangerous environments, and has important significance in the field of industrial temperature control. However, the difficulty of infrared image temperature measurement lies in the accuracy thereof, the calibration requirement for infrared spectrum data is extremely high, and the accuracy of calibration parameters directly affects the accuracy of temperature measurement.
The SF6 gas has good insulating property and arc extinguishing performance, and is fully applied to the field of high-voltage electrical switch equipment of transformer substations. Because the high-voltage electrical switching equipment is manufactured and installed with certain differences, and the phenomenon that product materials are aged can occur after the high-voltage electrical switching equipment is used for a long time, the SF6 high-voltage electrical switching equipment has a gas leakage phenomenon in production and operation, the normal operation of the equipment can be influenced, and certain potential safety hazards can be brought to the personal safety of workers. If the leakage of the SF6 gas can be monitored, the gas can be prevented from happening in the prior art, and accidents can be reduced. The infrared spectrum analysis method can monitor the SF6 gas leakage condition in a non-contact way, each decomposition product of SF6 gas discharge has one or more infrared spectrum characteristic peaks which are obviously absorbed, and the SF6 gas leakage condition can be judged according to the size of the infrared spectrum characteristic peaks.
Therefore, in order to accurately extract the characteristic peak and calibrate the concentration of the leaking gas, a calibration setting capable of strictly and accurately acquiring calibration parameters is needed.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a calibration device and a calibration method which can calculate line loss more accurately and are used for transformer substation infrared temperature measurement and SF6 gas spectrum monitoring, so as to solve the technical problems in the prior art that the infrared temperature measurement accuracy and the spectrum peak value of leaked gas in an SF6 infrared spectrum monitoring method are inaccurate.
In order to achieve the above object, the present invention provides a calibration apparatus for infrared temperature measurement and SF6 gas spectrum monitoring of a transformer substation, comprising:
a high temperature black body radiation source for emitting infrared spectra;
the gas cell consists of a sealed gas chamber, an incident window and an exit window which are arranged at two ends of the gas chamber along a light source transmission path, and infrared spectrum emitted by the high-temperature black body radiation source is emitted from the incident window and is emitted from the exit window;
a detector for collecting an infrared spectrum emitted through an exit window of the gas cell;
and a computer for receiving the spectral data output by the detector, and processing and calculating the spectral data.
As a further preferable technical solution of the present invention, the entrance window and the exit window of the gas cell are both deep low temperature helium shields, and the gas chamber of the gas cell is used for filling a predetermined gas or vacuuming.
As a further preferable technical solution of the present invention, an interference system is further disposed at an incident front end of the detector, and the infrared spectrum emitted from the exit window of the gas cell is filtered by the interference system and then collected on the surface of the detector.
As a further preferable aspect of the present invention, the computer includes:
the interference data pool is used for caching the spectral data output to the computer by the detector;
the Fourier transform module is used for generating an infrared spectrum diagram after the cached spectrum data is subjected to Fourier transform;
the nonlinear correction module is used for correcting the pixel of the detector in the infrared spectrum line graph and correcting the pixel output signal intensity and the infrared radiation quantity of the detector into linearity by reading preset correction parameters;
the spectrum averaging module is used for accumulating the pixel data corresponding to each frame of the corrected spectrum data to obtain an average value of each pixel;
the radiation calibration module is used for inputting the spectral data processed by the spectral averaging module and calculating to obtain calibration parameters;
and the calibration parameter pool is used for storing the calculated calibration parameters.
In a further preferred embodiment of the present invention, the predetermined gas is air or SF6 gas.
As a further preferable technical scheme of the invention, the detector is an uncooled infrared focal plane detector.
According to another aspect of the invention, the invention further provides a calibration method for transformer substation infrared temperature measurement and SF6 gas spectrum monitoring, which is characterized by comprising the following steps:
firstly, vacuumizing an air pool, and setting the temperature of a high-temperature black body radiation source to be T1The computer acquires the spectral data acquired by the detector under the current condition, processes the spectral data, and calculates the infrared radiation C under the current condition according to the processing result0(T1) The formula is as follows:
C0(T1)＝B(T1)·τ0(λ)·A1+Bg0·A1+A2
wherein, B (T)1)、Bg0Respectively high temperature black body radiation source radiation, gas cell radiation, tau0(lambda) gas cell spectral transmittance, A1、A2The slope and intercept of the calibration curve are respectively;
secondly, vacuumizing the gas tank, and setting the temperature of the high-temperature black body radiation source to be T2The computer acquires the spectral data acquired by the detector under the current condition, processes the spectral data, and calculates the infrared radiation C under the current condition according to the processing result0(T2) The formula is as follows:
C0(T2)＝B(T2)·τ0(λ)·A1+Bg0·A1+A2
wherein, B (T)2)、Bg0Respectively high temperature black body radiation source radiation, gas cell radiation, tau0(lambda) gas cell spectral transmittance, A1、A2The slope and intercept of the calibration curve are respectively;
thirdly, respectively arranging the high-temperature black body radiation sources at T1And T2The infrared radiation quantity C obtained by calculation0(T1) And amount of infrared radiation C0(T2) Calculating the transmission rate in the vacuum environment according to the following formula:
fourthly, inflating the gas tank, and setting the temperature of the high-temperature black body radiation source to be T1The computer acquires the spectral data acquired by the detector under the current condition, processes the spectral data, and calculates the infrared radiation C under the current condition according to the processing resultg(T1) The formula is as follows:
Cg(T1)＝B(T1)·τg(λ)·A1+Bg·A1+A2
wherein, B (T)1)、BgRespectively high temperature black body radiation source radiation, gas cell radiation, taug(lambda) gas cell spectral transmittance, A1、A2The slope and intercept of the calibration curve are respectively;
fifthly, inflating the gas tank, and setting the temperature of the high-temperature black body radiation source as T2The computer acquires the spectral data acquired by the detector under the current condition, processes the spectral data, and calculates the infrared radiation C under the current condition according to the processing resultg(T2) The formula is as follows:
Cg(T2)＝B(T2)·τg(λ)·A1+Bg·A1+A2
wherein, B (T)2)、BgRespectively high temperature black body radiation source radiation, gas cell radiation, taug(lambda) gas cell spectral transmittance, A1、A2The slope and intercept of the calibration curve are respectively;
sixthly, respectively arranging the high-temperature black body radiation sources at T1And T2The infrared radiation quantity C obtained by calculationg(T1) And amount of infrared radiation Cg(T2) Calculating the transmission rate in the inflation environment according to the following formula:
seventhly, calculating the temperature T of the high-temperature black body radiation source1And T2The absorption spectral lines at the temperature changing of the two temperature points, namely the ratio of the charged infrared radiation quantity difference of the gas pool to the non-charged infrared radiation quantity difference, are stored in the calibration parameter pool to be used as calibration parameters, and the calculation formula of the absorption spectral lines is as follows:
as a further preferred technical solution of the present invention, the specific process of processing the spectral data by the computer includes the following steps:
caching spectral data output to a computer by a detector;
generating an infrared spectrum chart by Fourier transform of the cached spectrum data;
correcting pixels of a detector in the infrared spectrogram, and correcting the pixel output signal intensity and the infrared radiation amount of the detector into linearity by reading preset correction parameters;
and accumulating the pixel data corresponding to each frame of the corrected spectrum data to obtain the average value of each pixel.
By adopting the technical scheme, the calibration device and the calibration method for transformer substation infrared temperature measurement and SF6 gas spectrum monitoring can accurately calculate the absorption spectrum line of the inflation environment by utilizing the vacuum environment and the inflation environment of the gas pool, have expansibility, and can obtain the absorption spectrum line of SF6 gas if SF6 gas is injected into the gas chamber, so that the calibration method has important significance for improving the accuracy of transformer substation infrared temperature measurement and SF6 gas spectrum monitoring.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a system block diagram of an example provided by a calibration device for substation infrared thermometry and SF6 gas spectroscopy monitoring;
FIG. 2 is a method flow diagram of a calibration method for substation infrared temperature measurement and SF6 gas spectrum monitoring;
the objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments. In the preferred embodiments, the terms "upper", "lower", "left", "right", "middle" and "a" are used for clarity of description only, and are not used to limit the scope of the invention, and the relative relationship between the terms and the terms is not changed or modified substantially without changing the technical content of the invention.
As shown in fig. 1, the invention discloses a calibration device for transformer substation infrared temperature measurement and SF6 gas spectrum monitoring, which comprises:
the high-temperature black body radiation source is used for emitting infrared spectrum at a set temperature according to a preset requirement;
the gas cell consists of a sealed gas chamber, an entrance window and an exit window which are arranged at two ends of the gas chamber along a light source transmission path, infrared spectrums emitted by the high-temperature black body radiation source are emitted from the entrance window and the exit window, and the infrared spectrums are prevented from being influenced by other environmental factors due to the sealed light source channel;
the detector is used for collecting the infrared spectrum emitted by the exit window of the air pool, and the uncooled infrared focal plane detector is adopted in the invention, and can be other types of detectors;
and a computer for receiving the spectral data output by the detector, and processing and calculating the spectral data.
In specific implementation, an incident window and an exit window of the gas cell are both deep low-temperature helium screens, the deep low temperature is also called ultralow temperature and refers to below 196 ℃ below zero, the gas chamber of the gas cell can be better sealed by adopting the deep low-temperature helium screens, the gas chamber of the gas cell is used for filling preset gas or vacuumizing, when the gas cell is used for infrared temperature measurement calibration, the gas chamber is filled with air, and when the gas cell is used for SF6 gas calibration, the gas chamber is filled with SF6 gas; when the device is used for measuring the radiation quantity of the substrate at the front end passage of the calibration device, the gas chamber is vacuumized.
In specific implementation, an interference system is further arranged at the front incident end of the detector, infrared spectra emitted from an exit window of the gas cell are collected on the surface of the detector after being filtered by the interference system, the interference system belongs to an optical splitting system, the optical splitting system mainly has a function of filtering incident light of a certain waveband, the interference system belongs to the prior art, and the specific structure of the interference system is not described herein. In the invention, although only the infrared spectrum is incident at the front end of the interference system, due to environmental factors, spectra of other wave bands may exist, and in order to ensure that only the infrared spectrum is emitted to a rear-end detector, other spectra except the infrared spectrum need to be filtered.
In a specific implementation, the computer includes:
the interference data pool is used for caching the spectral data output to the computer by the detector;
the Fourier transform module is used for generating an infrared spectrum diagram after the cached spectrum data is subjected to Fourier transform;
the system comprises a nonlinear correction module, a first module and a second module, wherein in practice, the relation between the output signal intensity of a detector pixel and the infrared radiation amount is represented as an S curve, each pixel of the detector needs to be corrected to obtain a uniform linear relation between the infrared radiation amount and the output signal intensity, and the nonlinear correction module is used for correcting the pixel output signal intensity of the detector and the infrared radiation amount into linearity by reading preset correction parameters;
the spectrum averaging module is used for accumulating the pixel data corresponding to each frame of the corrected spectrum data to obtain an average value of each pixel;
the radiation calibration module is used for inputting the spectral data processed by the spectral averaging module and calculating to obtain calibration parameters;
and the calibration parameter pool is used for storing the calculated calibration parameters, the device obtains the calibration parameters after calibration, and the gas content and the gas components are calculated by taking the calibration parameters as reference points when the subsequent equipment actually works.
As shown in fig. 2, based on the same inventive concept, the invention also discloses a calibration method for transformer substation infrared temperature measurement and SF6 gas spectrum monitoring, which comprises the following steps:
step S101, vacuumizing the gas tank, and setting the temperature of the high-temperature black body radiation source to be T1The computer acquires the spectral data acquired by the detector under the current condition, processes the spectral data, and calculates the infrared radiation C under the current condition according to the processing result0(T1)；
It should be noted here that the detection instrument collects infrared radiation that is transmitted through the gas cell and emitted by the high temperature black body radiation source, but as long as the temperature of the object is above zero degrees centigrade, infrared energy is emitted, so that the infrared energy actually entering the detection instrument is not only emitted by the high temperature black body radiation source, but also emitted by the gas cell itself, that is, the gas in the entrance window, the exit window and the gas chamber of the gas cell has infrared energy emission. Thus, the incident energy of the detector originates from the radiation of the high temperature black body radiation source and the radiation of the gas cell.
In step S101, the following calculation formula is used:
C0(T1)＝B(T1)·τ0(λ)·A1+Bg0·A1+A2
wherein, B (T)1)、Bg0Respectively high temperature black body radiation source radiation, gas cell radiation, tau0(lambda) gas cell spectral transmittance, A1、A2The slope and intercept of the calibration curve are respectively;
step S102, vacuumizing the gas pool, and setting the temperature of the high-temperature black body radiation source to be T2The computer acquires the spectral data acquired by the detector under the current condition, processes the spectral data, and calculates the infrared radiation C under the current condition according to the processing result0(T2)；
In step S102, compared to step S101, only the temperature of the high temperature black body radiation source is changed, and the calculation formula adopted is as follows:
C0(T2)＝B(T2)·τ0(λ)·A1+Bg0·A1+A2
wherein, B (T)2)、Bg0Respectively high temperature black body radiation source radiation, gas cell radiation, tau0(lambda) gas cell spectral transmittance, A1、A2The slope and intercept of the calibration curve are respectively;
step S103, respectively setting the high-temperature black body radiation sources at T1And T2The infrared radiation quantity C obtained by calculation0(T1) And amount of infrared radiation C0(T2) And calculating the transmission rate in the vacuum environment according to the following calculation formula:
step S104, inflating the gas tank, and setting the temperature of the high-temperature black body radiation source to be T1The computer acquires the spectral data acquired by the detector under the current conditions, processes the spectral data, and then processes the spectral data according toThe processing result calculates the infrared radiation C under the current conditiong(T1)；
In step S104, compared with steps S101 and S102, the air pool is changed to an inflation environment, and the calculation formula adopted by the air pool is as follows:
Cg(T1)＝B(T1)·τg(λ)·A1+Bg·A1+A2
wherein, B (T)1)、BgRespectively high temperature black body radiation source radiation, gas cell radiation, taug(lambda) gas cell spectral transmittance, A1、A2The slope and intercept of the calibration curve are respectively;
step S105, inflating the gas tank, and setting the temperature of the high-temperature black body radiation source to be T2The computer acquires the spectral data acquired by the detector under the current condition, processes the spectral data, and calculates the infrared radiation C under the current condition according to the processing resultg(T2)；
In step S105, compared with step S104, only the temperature of the high temperature blackbody radiation source is changed, and the calculation formula adopted is as follows:
Cg(T2)＝B(T2)·τg(λ)·A1+Bg·A1+A2
wherein, B (T)2)、BgRespectively high temperature black body radiation source radiation, gas cell radiation, taug(lambda) gas cell spectral transmittance, A1、A2The slope and intercept of the calibration curve are respectively;
step S106, respectively setting the high-temperature black body radiation sources at T1And T2The infrared radiation quantity C obtained by calculationg(T1) And amount of infrared radiation Cg(T2) And calculating the transmission rate in the inflation environment according to the following calculation formula:
step S107, calculating high temperature blackbody radiationThe source being at a temperature T1And T2Absorption spectral lines at the temperature change of the two temperature points, namely the ratio of the transmission gain tested under the air inflation condition to the transmission gain tested under the vacuum condition, and storing the ratio into a calibration parameter pool to be used as a calibration parameter;
the absorption line is calculated as follows:
in a specific implementation, the specific process of processing the spectral data by the computer includes the following steps:
caching spectral data output to a computer by a detector;
generating an infrared spectrum chart by Fourier transform of the cached spectrum data;
correcting pixels of a detector in the infrared spectrogram, and correcting the pixel output signal intensity and the infrared radiation amount of the detector into linearity by reading preset correction parameters;
and accumulating the pixel data corresponding to each frame of the corrected spectrum data to obtain the average value of each pixel.
In the method of the invention, the temperatures of the high-temperature blackbody radiation sources are respectively set as T1And T2The gas pool is pumped into a vacuum environment to obtain a group of infrared radiation amount; then the temperatures of the high-temperature blackbody radiation sources are respectively set to be T1And T2Obtaining another group of infrared radiation amount under the environment that gas is injected into the gas pool; according to the two groups of radiant quantities, the transmission gain tested under the inflation condition when the high-temperature black body radiation source is changed in temperature can be calculated, and the ratio of the transmission gain tested under the vacuum condition is divided to obtain the absorption spectrum line, so that the radiant quantity of the infrared radiation source can be accurately calculated, and accurate calibration is completed.
The calibration method accurately calculates the absorption spectrum line of the gas-filled environment by utilizing the vacuum environment and the gas-filled environment of the gas chamber, has expansibility, and has important significance for improving the infrared temperature measurement of the transformer substation and the accuracy of SF6 gas spectrum monitoring if SF6 gas is injected into the gas chamber to obtain the absorption spectrum line of SF6 gas.
The calibration parameter pool is used for storing, storing and calculating the measured and calculated calibration parameters, and when the device is used in an actual environment, the target temperature or the content of SF6 gas or other gases can be determined according to the radiant quantity measured by the device and the calibration parameters. The calibration parameters are standard scale data generated when the equipment is calibrated, and when the equipment is used in an actual environment, the measured infrared radiation quantity is looked up according to the standard scale table to obtain the actual temperature of the measured object; meanwhile, if the measured object is gas, the gas has certain absorption rate to the infrared spectrum, and because the absorption rate of the gas (air or SF6 gas) to the infrared spectrum is accurately measured in the calibration process of a laboratory, the corresponding gas components and content can be determined by looking up a table according to the infrared absorption spectrum line and the absorption rate. Therefore, the calibration method has important significance for improving the accuracy of infrared temperature measurement of the transformer substation and SF6 gas spectrum monitoring.
Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely examples and that many variations or modifications may be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims.
Claims (8)
1. The utility model provides a calibration device that is used for infrared temperature measurement of transformer substation and SF6 gas spectrum monitoring which characterized in that includes:
a high temperature black body radiation source for emitting infrared spectra;
the gas cell consists of a sealed gas chamber, an incident window and an exit window which are arranged at two ends of the gas chamber along a light source transmission path, and infrared spectrum emitted by the high-temperature black body radiation source is emitted from the incident window and is emitted from the exit window;
a detector for collecting an infrared spectrum emitted through an exit window of the gas cell;
and a computer for receiving the spectral data output by the detector, and processing and calculating the spectral data.
2. The calibration device for substation infrared temperature measurement and SF6 gas spectrum monitoring as claimed in claim 1, wherein said entrance window and exit window of said gas cell are helium screens of deep cryogenic temperature, and said gas cell chamber is used for filling with predetermined gas or evacuating.
3. The calibration device for substation infrared temperature measurement and SF6 gas spectrum monitoring as claimed in claim 1, wherein an interference system is further disposed at an incident front end of said detector, and infrared spectrum emitted from an exit window of said gas cell is filtered by said interference system and collected on a surface of said detector.
4. The calibration device for infrared temperature measurement of substations and spectral monitoring of SF6 gas according to any of claims 1 to 3, wherein said computer comprises:
the interference data pool is used for caching the spectral data output to the computer by the detector;
the Fourier transform module is used for generating an infrared spectrum diagram after the cached spectrum data is subjected to Fourier transform;
the nonlinear correction module is used for correcting the pixel of the detector in the infrared spectrum line graph and correcting the pixel output signal intensity and the infrared radiation quantity of the detector into linearity by reading preset correction parameters;
the spectrum averaging module is used for accumulating the pixel data corresponding to each frame of the corrected spectrum data to obtain an average value of each pixel;
the radiation calibration module is used for inputting the spectral data processed by the spectral averaging module and calculating to obtain calibration parameters; and the calibration parameter pool is used for storing the calculated calibration parameters.
5. The calibration device for substation infrared temperature measurement and SF6 gas spectrum monitoring of claim 4, wherein said predetermined gas is air or SF6 gas.
6. The calibration device for infrared temperature measurement of substations and spectral monitoring of SF6 gas according to claim 5, wherein said detector is an uncooled infrared focal plane detector.
7. The calibration method of the calibration device for the infrared temperature measurement of the transformer substation and the spectrum monitoring of the SF6 gas as recited in any one of claims 1 to 6, comprising the steps of:
firstly, vacuumizing an air pool, and setting the temperature of a high-temperature black body radiation source to be T1The computer acquires the spectral data acquired by the detector under the current condition, processes the spectral data, and calculates the infrared radiation C under the current condition according to the processing result0(T1) The formula is as follows:
C0(T1)＝B(T1)·τ0(λ)·A1+Bg0·A1+A2
wherein, B (T)1)、Bg0Respectively high temperature black body radiation source radiation, gas cell radiation, tau0(lambda) gas cell spectral transmittance, A1、A2The slope and intercept of the calibration curve are respectively;
secondly, vacuumizing the gas tank, and setting the temperature of the high-temperature black body radiation source to be T2The computer acquires the spectral data acquired by the detector under the current condition, processes the spectral data, and calculates the infrared radiation C under the current condition according to the processing result0(T2) The formula is as follows:
C0(T2)＝B(T2)·τ0(λ)·A1+Bg0·A1+A2
wherein, B (T)2)、Bg0Respectively high temperature black body radiation source radiation, gas cell radiation, tau0(lambda) gas cell spectral transmittance, A1、A2The slope and intercept of the calibration curve are respectively;
thirdly, respectively arranging the high-temperature black body radiation sources at T1And T2The infrared radiation quantity C obtained by calculation0(T1) And amount of infrared radiation C0(T2) Calculating the transmission rate in the vacuum environment according to the following formula:
fourthly, inflating the gas tank, and setting the temperature of the high-temperature black body radiation source to be T1The computer acquires the spectral data acquired by the detector under the current condition, processes the spectral data, and calculates the infrared radiation C under the current condition according to the processing resultg(T1) The formula is as follows:
Cg(T1)＝B(T1)·τg(λ)·A1+Bg·A1+A2
wherein, B (T)1)、BgRespectively high temperature black body radiation source radiation, gas cell radiation, taug(lambda) gas cell spectral transmittance, A1、A2The slope and intercept of the calibration curve are respectively;
fifthly, inflating the gas tank, and setting the temperature of the high-temperature black body radiation source as T2The computer acquires the spectral data acquired by the detector under the current condition, processes the spectral data, and calculates the infrared radiation C under the current condition according to the processing resultg(T2) The formula is as follows:
Cg(T2)＝B(T2)·τg(λ)·A1+Bg·A1+A2
wherein, B (T)2)、BgRespectively high temperature black body radiation source radiation, gas cell radiation, taug(lambda) gas cell spectral transmittance, A1、A2The slope and intercept of the calibration curve are respectively;
sixthly, respectively arranging the high-temperature black body radiation sources at T1And T2The infrared radiation amount obtained by the following calculationCg(T1) And amount of infrared radiation Cg(T2) Calculating the transmission rate in the inflation environment according to the following formula:
seventhly, calculating the temperature T of the high-temperature black body radiation source1And T2The absorption spectral lines at the temperature changing of the two temperature points, namely the ratio of the charged infrared radiation quantity difference of the gas pool to the non-charged infrared radiation quantity difference, are stored in the calibration parameter pool to be used as calibration parameters, and the calculation formula of the absorption spectral lines is as follows:
8. the scaling method according to claim 7, wherein the specific process of the computer processing the spectral data comprises the following steps:
caching spectral data output to a computer by a detector;
generating an infrared spectrum chart by Fourier transform of the cached spectrum data;
correcting pixels of a detector in the infrared spectrogram, and correcting the pixel output signal intensity and the infrared radiation amount of the detector into linearity by reading preset correction parameters;
and accumulating the pixel data corresponding to each frame of the corrected spectrum data to obtain the average value of each pixel.
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