Temperature and humidity attenuation compensation method in infrared radiation temperature measurement

Abstract

The invention relates to the technical field of infrared temperature measurement, in particular to a temperature and humidity attenuation compensation method in infrared radiation temperature measurement, which comprises the following steps of: acquiring the temperature of a target object based on an infrared temperature measurement device, and establishing a function relationship among a spectral radiation quantity, a given wavelength range and a target actually measured temperature; spectral radiation quantities corresponding to the target actual measurement temperature and the environment temperature are calculated respectively; a function relation between the water vapor absorption transmittance and the environment temperature and the environment humidity is also established, and the water vapor absorption transmittance under different environment temperatures and different environment humidity is obtained; a correction formula of the target infrared radiation after attenuation of the environment temperature and the environment humidity is deduced based on the Kirchhoff's thermal radiation law, and the actually measured spectral radiation quantity of the target object is corrected; and finally, inversely solving the real temperature of the target object. According to the invention, the problem of inaccurate infrared temperature measurement caused by inconsistent infrared radiation attenuation rules under different environment temperatures and humidity can be solved.

Description

Technical Field

[0001] The present invention relates to the field of infrared temperature measurement technology, and more specifically to a temperature and humidity attenuation compensation method in infrared radiation temperature measurement. Background Art

[0002] In a high humidity environment, due to the absorption of infrared radiation by water molecules, the measurement results of infrared temperature measuring instruments may be low. The existing technology detects fixed targets under different ambient humidity, collects data and establishes a fitting relationship to compensate for the influence of humidity on the temperature measurement results. However, this method can only solve the problem of inaccurate temperature measurement of a given infrared temperature measuring device under different ambient humidity, which is a single factor variable. It does not take into account the combined effect of ambient temperature and ambient humidity, nor does it start from the fundamental theory of infrared radiation to deeply analyze the attenuation law of infrared radiation under different temperature and humidity environments. This makes the technology not universal in practical application, and there are still certain errors in the measurement results under different ambient temperatures. Summary of the invention

[0003] In order to better solve the above problems, the present invention provides a temperature and humidity attenuation compensation method in infrared radiation temperature measurement, and is implemented by performing the following steps:

[0004] Step S1: Based on the infrared temperature measuring device, the temperature of the target object is obtained and used as the target measured temperature, a functional relationship between the spectral radiation and a given wavelength range and the target measured temperature is established, and the spectral radiation corresponding to the target measured temperature and the ambient temperature is calculated;

[0005] Step S2: establishing a functional relationship between the water vapor absorption transmittance and the ambient temperature and ambient humidity, and obtaining the water vapor absorption transmittance under different ambient temperatures and different ambient humidities respectively;

[0006] Step S3: Based on the spectral radiation corresponding to the measured temperature of the target, the spectral radiation corresponding to the ambient temperature, and the water vapor absorption transmittance under different ambient temperatures and different ambient humidities, the measured spectral radiation of the target object is corrected, the measured spectral radiation of the target after temperature and humidity attenuation compensation is calculated, and the real spectral radiation of the target object is obtained;

[0007] Step S4: Based on the real spectral radiation of the target object and the spectral radiation calculation formula, the real temperature of the target object is obtained by inverse solution, thereby realizing temperature and humidity attenuation compensation in infrared radiation temperature measurement.

[0008] As a preferred technical solution of the present invention, in step S1, before establishing the functional relationship between the spectral radiation and the given wavelength range and the target measured temperature, the method includes:

[0009] Prepare a target object to be measured, use the infrared temperature measuring device to obtain the measured temperature of the target object, define the detectable temperature range of the infrared temperature measuring device as a first temperature to a second temperature, and define the infrared temperature measuring device detector to receive a band [λ1, λ2] from a first value to a second value.

[0010] As a preferred technical solution of the present invention, in step S1, establishing a functional relationship between the spectral radiation and the given wavelength range and the target measured temperature includes:

[0011] Formula 1 is used to express the spectral radiation of the target object at a temperature of T at a fixed wavelength λ:

[0012]

[0013] Wherein, C1 represents Planck's first constant, C2 represents Planck's second constant, T represents the temperature of the target object, λ represents the fixed wavelength of the spectral band, M(λ,T) represents the spectral radiation of the target object with a temperature of T at a fixed wavelength λ, and the target object represents a calibrated standard source.

[0014] As a preferred technical solution of the present invention, the functional relationship between the spectral radiation and the given wavelength range and the target measured temperature also includes:

[0015] Formula 2 is used to express the spectral radiation of the target object with a temperature of T within the light wave range [λ1, λ2] that can be received by the detector of the infrared temperature measuring device in the form of a definite integral:

[0016]

[0017] The definite integral band [λ1, λ2] is consistent with the spectral band that can be received by the detector of the infrared temperature measuring device.

[0018] As a preferred technical solution of the present invention, a functional relationship between the water vapor absorption transmittance and the ambient temperature and ambient humidity is established, and the water vapor absorption transmittance under different ambient temperatures and different ambient humidities is obtained respectively, including:

[0019] The water vapor infrared spectrum transmittance function is expressed by formula 3:

[0020]

[0021] Wherein, τ(λ) represents the infrared spectrum transmittance of water vapor, ω represents the relative humidity, It represents the content of water vapor in saturated air, which is related to the ambient temperature and can be obtained by looking up the table of air temperature and saturated water vapor content. μ(λ) represents the infrared spectrum absorption attenuation coefficient of water vapor, which is only related to the fixed wavelength λ of the spectral band.

[0022] As a preferred technical solution of the present invention, the water vapor infrared spectrum absorption attenuation coefficient can also be expressed by a mean value:

[0023] Under constant ambient temperature and ambient temperature, if the water vapor infrared spectrum absorption attenuation coefficient and transmittance of infrared radiation in a given band are set to be a constant, the water vapor infrared spectrum absorption attenuation coefficient is expressed as the average value of the given band as Formula 4:

[0024]

[0025] in, It represents the infrared spectrum absorption attenuation coefficient of water vapor within a given wavelength [λ1, λ2] and is a constant.

[0026] As a preferred technical solution of the present invention, when the water vapor infrared spectrum absorption attenuation coefficient within a given wavelength [λ1, λ2] is a constant, it also includes:

[0027] After using the infrared temperature measuring device to obtain the target measured temperature value under different ambient temperature and humidity, the infrared spectrum absorption attenuation coefficient of water vapor in the first value to the second value band can be obtained through regression analysis. is a, so the water vapor absorption transmittance in the infrared temperature measuring device detector receivable band [λ1, λ2] can be expressed as:

[0028]

[0029] in, It represents the water vapor absorption and transmission rate.

[0030] As a preferred technical solution of the present invention, the calculation formula of the spectral radiation corresponding to the target measured temperature is:

[0031] After the target infrared radiation is attenuated by the ambient temperature and the ambient humidity, the spectral radiation corresponding to the target measured temperature received by the infrared temperature measuring device is expressed by Formula 6:

[0032]

[0033] Among them, T * represents the target measured temperature received by the infrared temperature measuring device, W(T * ) represents the target measured temperature T received by the infrared temperature measuring device *The corresponding spectral radiation, W(T) represents the spectral radiation corresponding to the measured temperature T of the target object, T0 represents the ambient temperature, W(T0) represents the spectral radiation corresponding to the ambient temperature, represents the absorption radiation rate of the water vapor, and the target infrared radiation refers to the infrared radiation emitted by the target object.

[0034] As a preferred technical solution of the present invention, a correction formula for the target infrared radiation after attenuation by ambient temperature and ambient humidity is obtained:

[0035] The sum of the object's emissivity (or absorptivity) ε, reflectivity ρ and transmittance τ is constant at 1, and the correction formula 8 for the target infrared radiation after attenuation by ambient temperature and ambient humidity is obtained:

[0036]

[0037] Among them, T1 represents the temperature before compensation, that is, the temperature actually measured by the detector of the infrared temperature measuring device after the target radiation is attenuated by temperature and humidity; T2 represents the temperature after compensation, that is, the original real temperature of the target object.

[0038] As a preferred technical solution of the present invention, inversely solving the actual temperature of the target object includes:

[0039] The target measured spectral radiation after temperature and humidity attenuation compensation is substituted into the spectral radiation calculation formula to solve for the real temperature of the target object.

[0040] Compared with the prior art, the beneficial effects of the present invention are at least as follows:

[0041] 1. The technical solution of the present invention obtains the temperature of the target object based on the infrared temperature measuring device in the spectral radiation acquisition module, establishes a functional relationship between the spectral radiation and the given wavelength range and the target measured temperature, and calculates the spectral radiation corresponding to the target measured temperature and the ambient temperature respectively, so as to compare the spectral radiation difference between the target object and the environment in the same wavelength range, thereby providing a basis for temperature and humidity attenuation correction. In the water vapor absorption transmittance function acquisition module, a functional relationship between water vapor absorption transmittance and ambient temperature and ambient humidity is established, and the water vapor absorption transmittance at different ambient temperatures and different ambient humidities is obtained respectively, and the influence of ambient temperature on water vapor absorption transmittance at different humidity is obtained; in the spectral radiation temperature and humidity attenuation correction module, a correction formula for the target infrared radiation after attenuation by ambient temperature and ambient humidity is derived based on Kirchhoff's thermal radiation law, and based on the spectral radiation corresponding to the target measured temperature, the spectral radiation corresponding to the ambient temperature and the water vapor absorption transmittance at different ambient temperatures and different ambient humidities, the measured spectral radiation of the target object is corrected, the corrected target measured spectral radiation is calculated, and the real spectral radiation of the target object is obtained; in the spectral radiation inverse temperature calculation module, based on the real spectral radiation of the target object and the spectral radiation calculation formula, the real temperature of the target object is obtained by inverse solution. On the one hand, the present invention takes into account the combined effect of the dual variables of ambient temperature and ambient humidity on the attenuation of infrared radiation, so that the method still has good stability when applied to complex practical environments; on the other hand, it does not rely on a specific infrared temperature measuring device and has universal applicability in the field of infrared radiation temperature measurement.

[0042] 2. The technical solution of the present invention studies the infrared spectral radiation theory, and adopts theoretical modeling and data simulation to establish a quantitative mapping relationship between ambient temperature and humidity-infrared radiation-temperature measurement results, which can solve the problem of inaccurate infrared temperature measurement caused by inconsistent infrared radiation attenuation laws under different ambient temperatures and humidities. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0044] Figure 1 A flow chart of the steps of a temperature and humidity attenuation compensation method in infrared radiation temperature measurement in the present invention;

[0045] Figure 2 It is a relationship diagram between water vapor absorption transmittance and ambient temperature under different humidity conditions in the present invention. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0047] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but unless otherwise specified, these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first xx script may be referred to as a second xx script, and similarly, a second xx script may be referred to as a first xx script.

[0048] The existing technology in the field of infrared temperature measurement technology can only solve the problem of inaccurate temperature measurement of a given infrared temperature measurement device under a single variable of different ambient humidity. It does not take into account the combined effect of ambient temperature and ambient humidity, nor does it start from the fundamental theory of infrared radiation to deeply analyze the attenuation law of infrared radiation under different temperature and humidity environments. As a result, the technology is not universal in practical application, and there are still certain errors in the measurement results under different ambient temperatures.

[0049] In view of the above technical problems, the present invention proposes Figure 1 A temperature and humidity attenuation compensation method in infrared radiation temperature measurement is shown, comprising the following steps:

[0050] Step S1: Based on the infrared temperature measuring device, the temperature of the target object is obtained and used as the target measured temperature, a functional relationship between the spectral radiation and the given wavelength range and the target measured temperature is established, and the spectral radiation corresponding to the target measured temperature and the ambient temperature is calculated.

[0051] Specifically, determine the detectable temperature range of the infrared temperature measuring device and the receivable wavelength band [λ1, λ2] of the detector, and also determine the target object. Generally, the target object is a black body radiator, but it can also be other constant temperature objects. Use the infrared temperature measuring device to measure the temperature of the target object, and measure its temperature by receiving the infrared radiation emitted by the target object, and record the measured temperature value as the target measured temperature. Establish a functional relationship between the spectral radiation and the given wavelength range and the target measured temperature, and use the established functional relationship to substitute the target measured temperature into the formula to calculate the spectral radiation of the target object within the given wavelength range. At the same time, substitute the ambient temperature into the same formula to calculate the spectral radiation of the ambient temperature within the given wavelength range, so as to compare the spectral radiation difference between the target object and the environment within the same wavelength range, and provide a basis for temperature and humidity attenuation correction. The functional relationship between the spectral radiation and the given wavelength range and the target measured temperature will be described in detail below.

[0052] Step S2: establishing a functional relationship between the water vapor absorption transmittance and the ambient temperature and ambient humidity, and obtaining the water vapor absorption transmittance under different ambient temperatures and different ambient humidity.

[0053] Specifically, based on the Lambert-Beer law, the infrared spectrum transmittance function of water vapor is derived. Under constant ambient temperature and humidity, it can be considered that the water vapor spectrum absorption attenuation coefficient and transmittance of infrared radiation in a given band are constants, and the water vapor absorption attenuation coefficient can be replaced by the average value of the given band; since the infrared spectrum absorption attenuation coefficient of water vapor in a given wavelength [λ1, λ2] is a constant. After using the infrared temperature measuring device to obtain the target measured temperature value under different ambient temperature and humidity, the infrared spectrum absorption attenuation coefficient of water vapor in the 8-14um band can be obtained through regression analysis. For a, such as Figure 2 , showing the effect of ambient temperature on water vapor absorption and transmission rate at different humidity.

[0054] Step S3: Based on the spectral radiation corresponding to the target measured temperature, the spectral radiation corresponding to the ambient temperature, and the water vapor absorption transmittance under different ambient temperatures and different ambient humidities, the measured spectral radiation of the target object is corrected, the target measured spectral radiation after temperature and humidity attenuation compensation is calculated, and the true spectral radiation of the target object is obtained.

[0055] Step S4: Based on the real spectral radiation of the target object and the spectral radiation calculation formula, the real temperature of the target object is obtained by inverse solution, thereby realizing temperature and humidity attenuation compensation in infrared radiation temperature measurement.

[0056] Specifically, for blackbody targets with real temperatures of 30°C, 100°C, 350°C and 600°C, different temperature and humidity environments are set to verify the accuracy of this method. The measured temperature before compensation and the corrected temperature after compensation are shown in Tables 1, 2 and 3. It can be observed that the corrected temperature after compensation is closer to the real temperature of the blackbody target. In this example, a blackbody target is used as the target object, where the blackbody target is a blackbody radiator or other constant temperature objects. Different temperature and humidity environments are set by a walk-in constant temperature and humidity test room.

[0057] Table 1

[0058]

[0059] Table 2

[0060]

[0061] Table 3

[0062]

[0063]

[0064] Through the coordination between the above steps, the present invention still has good stability when applied to complex practical environments; in addition, the present invention does not rely on a specific infrared temperature measuring device and has universal applicability in the field of infrared radiation temperature measurement.

[0065] Furthermore, in the above step S1, before establishing the functional relationship between the spectral radiation and the given wavelength range and the target measured temperature, the following steps are included:

[0066] Prepare a target object to be measured, use an infrared temperature measuring device to obtain the actual measured temperature of the target object, define the detectable temperature range of the infrared temperature measuring device as a first temperature to a second temperature, and define the infrared temperature measuring device detector to receive a band [λ1, λ2] from a first value to a second value.

[0067] Specifically, the detectable temperature range of the infrared temperature measuring device may be -20°C to 650°C, the receivable waveband [λ1, λ2] of the infrared temperature measuring device detector may be 8 to 14 um, and the target object may be a black body radiator or other constant temperature object.

[0068] Furthermore, in the above step S1, a functional relationship between the spectral radiation and the given wavelength range and the target measured temperature is established, including:

[0069] Based on Planck's blackbody radiation formula, Formula 1 is used to express the spectral radiation of a target object with a temperature of T at a fixed wavelength λ:

[0070]

[0071] Wherein, C1 represents Planck's first constant, C2 represents Planck's second constant, T represents the temperature of the target object, λ represents the fixed wavelength of the spectral band, M(λ,T) represents the spectral radiation of the target object with a temperature of T at a fixed wavelength λ, and the target object represents the standard source for calibration.

[0072] Furthermore, the functional relationship between the spectral radiation and the given wavelength range and the target measured temperature also includes:

[0073] Based on Planck's blackbody radiation formula, the spectral radiation of the target object with temperature T within the light wave range [λ1, λ2] that the detector of the infrared temperature measuring device can receive is expressed in the form of a definite integral through formula 2:

[0074]

[0075] Among them, the definite integral band [λ1,λ2] is consistent with the spectral band that the infrared temperature measuring device detector can receive.

[0076] Furthermore, a functional relationship between the water vapor absorption transmittance and the ambient temperature and ambient humidity is established, and the water vapor absorption transmittance under different ambient temperatures and different ambient humidity is obtained respectively, including:

[0077] Based on the Lambert-Beer law, the water vapor infrared spectrum transmittance function is derived and expressed by formula 3:

[0078]

[0079] Among them, τ(λ) represents the infrared spectrum transmittance of water vapor, ω represents the relative humidity, It indicates the content of water vapor in saturated air, which is related to the ambient temperature and can be obtained by looking up the table of air temperature and saturated water vapor content. μ(λ) indicates the infrared spectrum absorption attenuation coefficient of water vapor, which is only related to the fixed wavelength λ of the spectral band.

[0080] Furthermore, the water vapor infrared spectrum absorption attenuation coefficient can also be expressed as the mean value:

[0081] Under constant ambient temperature and ambient temperature, if the water vapor infrared spectrum absorption attenuation coefficient and transmittance of infrared radiation in a given band are set to be a constant, the water vapor infrared spectrum absorption attenuation coefficient is expressed as the average value of the given band as Formula 4:

[0082]

[0083] in, It represents the infrared spectrum absorption attenuation coefficient of water vapor within a given wavelength [λ1, λ2] and is a constant.

[0084] Furthermore, the water vapor infrared spectrum absorption attenuation coefficient within a given wavelength [λ1, λ2] is a constant and also includes:

[0085] After using the infrared temperature measuring device to obtain the target measured temperature value under different ambient temperature and humidity, the infrared spectrum absorption attenuation coefficient of water vapor in the first value to the second value band can be obtained through regression analysis. is a, so the water vapor absorption transmittance in the infrared temperature measuring device detector receivable band [λ1, λ2] can be expressed as:

[0086]

[0087] in, Indicates the water vapor absorption and transmission rate.

[0088] Specifically, due to the infrared absorption attenuation coefficient of water vapor within a given wavelength [λ1, λ2] is a constant. After using the infrared temperature measuring device to obtain the target measured temperature value under different ambient temperature and humidity, the infrared spectrum absorption attenuation coefficient of water vapor in the 8-14um band can be obtained through regression analysis. is a, so the water vapor absorption transmittance in the infrared temperature measuring device detector receivable band [λ1, λ2] can be expressed by formula 5, as follows: Figure 2 , showing the effect of ambient temperature on water vapor absorption and transmission rate at different humidity.

[0089] Furthermore, the calculation formula of the spectral radiation corresponding to the target measured temperature is:

[0090] Based on the law of conservation of energy, after the target infrared radiation is attenuated by the ambient temperature and humidity, the spectral radiation corresponding to the target measured temperature received by the infrared temperature measuring device is expressed by formula 6:

[0091]

[0092] Among them, T * Indicates the actual temperature of the target received by the infrared temperature measuring device, W(T * ) represents the target measured temperature T received by the infrared temperature measuring device * The corresponding spectral radiation, W(T) represents the spectral radiation corresponding to the measured temperature T of the target object, T0 represents the ambient temperature, W(T0) represents the spectral radiation corresponding to the ambient temperature, It represents the absorption radiation rate of water vapor, and the target infrared radiation refers to the infrared radiation emitted by the target object.

[0093] Specifically, since the direct reflection effect of water vapor in the atmosphere is relatively small and can be ignored, it can be considered that water vapor only absorbs and re-radiates the radiation of the environment and the radiation transmitted through the target object. The spectral radiation corresponding to the actual measured temperature of the target is obtained through the above-mentioned law of conservation of energy.

[0094] Furthermore, the correction formula of the target infrared radiation after attenuation by ambient temperature and ambient humidity is:

[0095] Based on Kirchhoff's law of thermal radiation, the sum of an object's emissivity (or absorptivity) ε, reflectivity ρ, and transmittance τ is constant at 1, which is expressed by Formula 7:

[0096] ε+ρ+τ=1 (Formula 7)

[0097] Among them, since the direct reflection effect of water vapor in the atmosphere is relatively small, the reflectivity ρ can be ignored. Substituting formula 7 into formula 6, the correction formula 8 of the target infrared radiation after attenuation by ambient temperature and ambient humidity can be obtained:

[0098]

[0099] Among them, T1 represents the temperature before compensation, that is, the temperature actually measured by the detector of the infrared temperature measuring device after the target radiation is attenuated by temperature and humidity; T2 represents the temperature after compensation, that is, the original true temperature of the target object.

[0100] Furthermore, the inverse solution to obtain the true temperature of the target object includes:

[0101] Substitute the measured spectral radiation of the target after temperature and humidity attenuation compensation into the spectral radiation calculation formula to solve for the true temperature of the target object.

[0102] In summary, the present invention obtains the temperature of the target object based on the infrared temperature measuring device in the spectral radiation acquisition module, establishes a functional relationship between the spectral radiation and the given wavelength range and the target measured temperature, and calculates the spectral radiation corresponding to the target measured temperature and the ambient temperature respectively, so as to compare the spectral radiation difference between the target object and the environment in the same wavelength range, thereby providing a basis for temperature and humidity attenuation correction. In the water vapor absorption transmittance function acquisition module, a functional relationship between water vapor absorption transmittance and ambient temperature and ambient humidity is established, and the water vapor absorption transmittance at different ambient temperatures and different ambient humidities is obtained respectively, and the influence of ambient temperature on water vapor absorption transmittance at different humidity is obtained; in the spectral radiation temperature and humidity attenuation correction module, a correction formula for the target infrared radiation after attenuation by ambient temperature and ambient humidity is derived based on Kirchhoff's thermal radiation law, and based on the spectral radiation corresponding to the target measured temperature, the spectral radiation corresponding to the ambient temperature and the water vapor absorption transmittance at different ambient temperatures and different ambient humidities, the measured spectral radiation of the target object is corrected, the corrected target measured spectral radiation is calculated, and the real spectral radiation of the target object is obtained; in the spectral radiation inverse temperature calculation module, based on the real spectral radiation of the target object and the spectral radiation calculation formula, the real temperature of the target object is obtained by inverse solution. On the one hand, the present invention takes into account the combined effect of the dual variables of ambient temperature and ambient humidity on the attenuation of infrared radiation, so that the method still has good stability when applied to complex practical environments; on the other hand, it does not rely on a specific infrared temperature measuring device and has universal applicability in the field of infrared radiation temperature measurement.

[0103] It should be understood that, although each step in the flow chart of each embodiment of the present invention is shown in sequence according to the indication of the arrow, these steps are not necessarily performed in sequence according to the order indicated by the arrow. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be performed in other orders. Moreover, at least a portion of the steps in each embodiment may include a plurality of sub-steps or a plurality of stages, and these sub-steps or stages are not necessarily performed at the same time, but can be performed at different times, and the execution order of these sub-steps or stages is not necessarily performed in sequence, but can be performed in turn or alternately with at least a portion of other steps or sub-steps or stages of other steps.

[0104] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program. The above-mentioned program can be stored in a non-volatile computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0105] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0106] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

[0107] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for compensating temperature and humidity attenuation in infrared radiation temperature measurement, characterized in that: The method comprises: Step S1: Based on the infrared temperature measuring device, the temperature of the target object is obtained and used as the target measured temperature, a functional relationship between the spectral radiation and a given wavelength range and the target measured temperature is established, and the spectral radiation corresponding to the target measured temperature and the ambient temperature is calculated; Step S2: establishing a functional relationship between the water vapor absorption transmittance and the ambient temperature and ambient humidity, and obtaining the water vapor absorption transmittance under different ambient temperatures and different ambient humidities respectively; Step S3: Based on the spectral radiation corresponding to the measured temperature of the target, the spectral radiation corresponding to the ambient temperature, and the water vapor absorption transmittance under different ambient temperatures and different ambient humidities, the measured spectral radiation of the target object is corrected, the measured spectral radiation of the target after temperature and humidity attenuation compensation is calculated, and the real spectral radiation of the target object is obtained; Step S4: Based on the real spectral radiation of the target object and the spectral radiation calculation formula, the real temperature of the target object is obtained by inverse solution, thereby realizing temperature and humidity attenuation compensation in infrared radiation temperature measurement.

2. The method according to claim 1, characterized in that In the step S1, before establishing the functional relationship between the spectral radiation and the given wavelength range and the target measured temperature, the method includes: Prepare a target object to be measured, use the infrared temperature measuring device to obtain the measured temperature of the target object, define the detectable temperature range of the infrared temperature measuring device as a first temperature to a second temperature, and define the infrared temperature measuring device detector to receive a band [λ1, λ2] from a first value to a second value.

3. The method according to claim 1, characterized in that In step S1, establishing a functional relationship between the spectral radiation and the given wavelength range and the target measured temperature includes: Formula 1 is used to express the spectral radiation of the target object at a temperature of T at a fixed wavelength λ: Wherein, C1 represents Planck's first constant, C2 represents Planck's second constant, T represents the temperature of the target object, λ represents the fixed wavelength of the spectral band, M(λ,T) represents the spectral radiation of the target object with a temperature of T at a fixed wavelength λ, and the target object represents a calibrated standard source.

4. The method according to claim 3, characterized in that The functional relationship between the spectral radiation and the given wavelength range and the measured temperature of the target also includes: Formula 2 is used to express the spectral radiation of the target object with a temperature of T within the light wave range [λ1, λ2] that can be received by the detector of the infrared temperature measuring device in the form of a definite integral: The definite integral band [λ1, λ2] is consistent with the spectral band that can be received by the detector of the infrared temperature measuring device.

5. The method according to claim 2, characterized in that: Establishing a functional relationship between the water vapor absorption transmittance and the ambient temperature and ambient humidity, and obtaining the water vapor absorption transmittance at different ambient temperatures and different ambient humidities, including: The water vapor infrared spectrum transmittance function is expressed by formula 3: Wherein, τ(λ) represents the infrared spectrum transmittance of water vapor, ω represents the relative humidity, It represents the content of water vapor in saturated air, which is related to the ambient temperature and can be obtained by looking up the table of air temperature and saturated water vapor content. μ(λ) represents the infrared spectrum absorption attenuation coefficient of water vapor, which is only related to the fixed wavelength λ of the spectral band.

6. The method according to claim 5, characterized in that The water vapor infrared spectrum absorption attenuation coefficient can also be expressed as a mean value: Under constant ambient temperature and ambient temperature, if the water vapor infrared spectrum absorption attenuation coefficient and transmittance of infrared radiation in a given band are set to be a constant, the water vapor infrared spectrum absorption attenuation coefficient is expressed as the average value of the given band as Formula 4: in, It represents the infrared spectrum absorption attenuation coefficient of water vapor within a given wavelength [λ1, λ2] and is a constant.

7. The method according to claim 6, characterized in that The water vapor infrared spectrum absorption attenuation coefficient within a given wavelength [λ1, λ2] is a constant and also includes: After using the infrared temperature measuring device to obtain the target measured temperature value under different ambient temperature and humidity, the infrared spectrum absorption attenuation coefficient of water vapor in the first value to the second value band can be obtained through regression analysis. is a, so the water vapor absorption transmittance in the infrared temperature measuring device detector receivable band [λ1, λ2] can be expressed as: in, It represents the water vapor absorption and transmission rate.

8. The method according to claim 7, characterized in that The calculation formula of the spectral radiation corresponding to the target measured temperature is: After the target infrared radiation is attenuated by the ambient temperature and the ambient humidity, the spectral radiation corresponding to the target measured temperature received by the infrared temperature measuring device is expressed by Formula 6: Among them, T * represents the target measured temperature received by the infrared temperature measuring device, W(T * ) represents the target measured temperature T received by the infrared temperature measuring device * The corresponding spectral radiation, W(T) represents the spectral radiation corresponding to the measured temperature T of the target object, T0 represents the ambient temperature, W(T0) represents the spectral radiation corresponding to the ambient temperature, represents the absorption radiation rate of the water vapor, and the target infrared radiation refers to the infrared radiation emitted by the target object.

9. The method according to claim 8, characterized in that Correction formula for target infrared radiation after attenuation by ambient temperature and humidity: The sum of the object's emissivity or absorptivity ε, reflectivity ρ and transmittance τ is constant at 1, and the correction formula 8 for the target infrared radiation after attenuation by ambient temperature and ambient humidity is obtained: Among them, T1 represents the temperature before compensation, that is, the temperature actually measured by the detector of the infrared temperature measuring device after the target radiation is attenuated by temperature and humidity; T2 represents the temperature after compensation, that is, the original real temperature of the target object.

10. The method according to claim 1, characterized in that The inverse solution to obtain the true temperature of the target object includes: The target measured spectral radiation after temperature and humidity attenuation compensation is substituted into the spectral radiation calculation formula to solve for the real temperature of the target object.

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