Method and device for measuring atmospheric air permeability based on infrared equipment

Abstract

The invention provides a method and a device for measuring atmospheric air permeability based on infrared equipment. The method comprises the following steps: respectively measuring infrared radiation brightness of an infrared standard source under a first distance and a second distance by utilizing an infrared thermal imager; wherein the first distance is smaller than the second distance, and the second distance is the same as the to-be-measured distance of the atmospheric transmittance; and according to the infrared radiation brightness of the infrared standard source under the first distance and the second distance, calculating the atmospheric transmittance under the distance to be measured. According to the scheme, infrared radiation brightness acquisition of different distances is carried out on the same infrared standard source by utilizing infrared thermal imagers of different wavebands, and accurate horizontal atmospheric transmittance can be obtained by combining two times of infrared radiation brightness data, so that measurement equipment in atmospheric transmittance measurement can be reduced, the measurement time can be shortened, and the measurement precision can be improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of infrared optical measurement technology, and in particular to a method and device for measuring atmospheric permeability based on infrared equipment. Background Art

[0002] In infrared optical measurement, precise measurement and research of atmospheric transmittance can accurately reflect the target characteristics of the measured target in the infrared optical band.

[0003] The atmospheric transmittance measurement method in the prior art has the problems of multiple measuring devices, long measuring time and poor accuracy.

[0004] Therefore, there is an urgent need to provide a method and device for measuring atmospheric permeability based on infrared equipment. Summary of the invention

[0005] In order to solve the problems of the traditional atmospheric permeability measurement method having many measuring devices, long measuring time and poor accuracy, the embodiment of the present invention provides a method and apparatus for measuring atmospheric permeability based on infrared equipment.

[0006] In a first aspect, an embodiment of the present invention provides a method for measuring atmospheric permeability based on an infrared device, wherein the infrared device includes an infrared thermal imager and an infrared standard source, and the method includes:

[0007] Using an infrared thermal imager to measure the infrared radiation brightness of an infrared standard source at a first distance and a second distance, respectively; wherein the first distance is smaller than the second distance, and the second distance is the same as a distance to be measured for atmospheric transmittance;

[0008] The atmospheric transmittance at the distance to be measured is calculated according to the infrared radiation brightness of the infrared standard source at the first distance and the second distance.

[0009] In a second aspect, an embodiment of the present invention further provides a device for measuring atmospheric permeability based on an infrared device, wherein the infrared device includes an infrared thermal imager and an infrared standard source, and the device includes:

[0010] A measuring unit, used to measure the infrared radiation brightness of the infrared standard source at a first distance and a second distance respectively using an infrared thermal imager; wherein the first distance is smaller than the second distance, and the second distance is the same as a distance to be measured for atmospheric transmittance;

[0011] A calculation unit is used to calculate the atmospheric transmittance at the distance to be measured according to the infrared radiation brightness of the infrared standard source at the first distance and the second distance.

[0012] In a third aspect, an embodiment of the present invention further provides a computing device, including a memory and a processor. A computer program is stored in the memory. When the processor executes the computer program, the method described in any embodiment of this specification is implemented.

[0013] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed on a computer, the computer is made to execute the method described in any embodiment of this specification.

[0014] On the other hand, an embodiment of the present application further provides a computer program product. The computer program product includes a computer program. A processor of a computer device reads the computer program from a computer-readable storage medium, and the processor executes the computer program, so that the computer device executes the method described in any of the above embodiments.

[0015] An embodiment of the present invention provides a method for measuring the atmospheric transmittance based on an infrared device. First, an infrared thermal imager is used to measure the infrared radiation luminance of an infrared standard source at a short distance. After that, the infrared thermal imager is moved to a position at the same distance as the distance to be measured and the infrared radiation luminance of the infrared standard source is measured again. Finally, based on the infrared radiation luminance of the standard source measured twice, the atmospheric transmittance at the distance to be measured can be obtained. Through practical application, compared with the traditional method for measuring the atmospheric transmittance, the measurement equipment in the embodiment of the present invention can be reduced from more than 6 sets to 2 sets, the time is saved by more than 80%, and the measurement uncertainty is reduced from the traditional 20% to within 5%. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 is a flowchart of a method for measuring the atmospheric transmittance based on an infrared device provided by an embodiment of the present invention;

[0018] Figure 2 is a calibration curve graph of an infrared thermal imager provided by an embodiment of the present invention;

[0019] Figure 3 is a position relationship diagram of an infrared thermal imager and an infrared standard source for measuring the atmospheric transmittance based on an infrared device provided by an embodiment of the present invention;

[0020] Figure 4It is a hardware architecture diagram of a computing device provided by an embodiment of the present invention;

[0021] Figure 5 It is a device structure diagram of a device for measuring atmospheric air permeability based on an infrared device provided by an embodiment of the present invention. Detailed implementation manners

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] The following describes the specific implementation manners of the above concepts.

[0024] Please refer to Figure 1 , an embodiment of the present invention provides a method for measuring atmospheric air permeability based on an infrared device. The infrared device includes an infrared thermal imager and an infrared standard source. The method includes:

[0025] Step 100: Use the infrared thermal imager to respectively obtain the infrared radiation brightness of the infrared standard source at a first distance and a second distance; wherein, the first distance is less than the second distance, and the second distance is the same as the distance to be measured for the atmospheric transmittance;

[0026] Step 102: Calculate the atmospheric transmittance at the distance to be measured according to the infrared radiation brightness of the infrared standard source at the first distance and the second distance.

[0027] In an embodiment of the present invention, first, the infrared radiation brightness of the infrared standard source at a short distance is tested by using the infrared thermal imager. Then, the infrared thermal imager is moved to a position the same as the distance to be measured to test the infrared radiation brightness of the infrared standard source again. Finally, according to the infrared radiation brightness of the standard source measured twice, the atmospheric transmittance at the distance to be measured can be obtained. Through actual application, compared with the traditional method for measuring atmospheric transmittance, the measuring device in the embodiment of the present invention can be reduced from more than 6 sets to two sets, the time is saved by more than 80%, and the measurement uncertainty is reduced from the traditional 20% to within 5%.

[0028] Regarding step 100:

[0029] In some embodiments, the infrared standard source is a standard blackbody, with a temperature of 10 - 150 °C, a radiation area of 500 × 500 mm, and an emissivity of 0.97.

[0030] In the embodiments of the present invention, since the radiation characteristics of a standard blackbody can be obtained through calculation, using the standard blackbody as an infrared standard source can reduce the uncertainty and error in the measurement process and ensure the accuracy of the measurement results.

[0031] Meanwhile, the infrared thermal imager in the embodiments of the present invention can be divided into a short-wave infrared thermal imager (band: 0.8 - 3 μm), a mid-wave infrared thermal imager (band: 3 - 5 μm), and a long-wave infrared thermal imager (band: 7 - 14 μm) according to the band. When measuring, the band of the infrared thermal imager can be adjusted according to the band to be measured, thereby enabling accurate measurement of the atmospheric transmittance of the required band.

[0032] In some embodiments, before using the infrared thermal imager to obtain the infrared radiation luminance of the infrared standard source at the first distance and the second distance respectively, it further includes the step of calibrating the infrared thermal imager using the infrared standard source.

[0033] In the embodiments of the present invention, before using the infrared thermal imager, it is first calibrated using the infrared standard source, and the calibration curve is as Figure 2 shown, thereby ensuring the measurement accuracy of the infrared thermal imager and further ensuring a high measurement accuracy of the atmospheric transmittance.

[0034] In some embodiments, the first distance is less than 1 meter.

[0035] In the embodiments of the present invention, by first setting up the standard blackbody and heating it to the specified temperature, and horizontally moving the infrared thermal imager to the first distance, the infrared radiation luminance of the standard blackbody without atmospheric attenuation at a short distance can be measured. Since this distance is small and there is no atmospheric attenuation, the infrared radiation luminance obtained at this distance can be approximated as the true radiation luminance of the standard blackbody. Subsequently, by combining it with the infrared radiation luminance measured at the distance to be measured, the atmospheric transmittance at the distance to be measured can be quickly and accurately obtained.

[0036] It should be noted that in the embodiments of the present invention, considering that the radiation intensity of the standard blackbody is different at different temperatures, if the distance to be measured is far, the temperature of the standard blackbody is set relatively high, and if the distance to be measured is near, the temperature of the standard blackbody is set relatively low, thereby further ensuring high accuracy in the measurement of the atmospheric transmittance.

[0037] Regarding step 102:

[0038] In some embodiments, step 102 includes:

[0039] Input the atmospheric temperature and the distance to be measured at the distance to be measured into the atmospheric path radiation calculation formula to obtain the atmospheric path radiation luminance at the distance to be measured;

[0040] Calculate the atmospheric transmittance at the distance to be measured based on the atmospheric path radiance at the distance to be measured and the infrared thermal imager at the first distance and the second distance.

[0041] In some embodiments, the atmospheric transmittance at the distance to be measured is calculated by the following formula:

[0042] τ(L) = (R b '(L,t) - R a (L)) / R b (l,t)

[0043] In the formula, τ(L) is the atmospheric transmittance at the distance to be measured, R b '(L,t) is the infrared radiance measured by the infrared thermal imager when the temperature of the infrared standard source at the second distance is t, R a (L) is the atmospheric path radiance at the second distance, R b (l,t) is the infrared radiance measured by the infrared thermal imager when the temperature of the infrared standard source at the first distance is t.

[0044] In the embodiments of the present invention, by first measuring the infrared radiance of a standard blackbody without atmospheric attenuation at a short distance, and then, as Figure 3 shown, moving the infrared thermal imager to the distance to be measured (i.e., the distance of the atmospheric transmittance to be measured, for example, it can be 1000 m), and reading the infrared radiance measured by the infrared thermal imager again, obtaining the infrared radiance of the standard blackbody without atmospheric attenuation at a short distance and the infrared radiance of the standard blackbody after atmospheric attenuation at the relevant distance, and combining the infrared radiance measured twice with the atmospheric path radiance formula, the atmospheric transmittance at the distance to be measured can be quickly and accurately obtained.

[0045] It can be seen that in the embodiments of the present invention, by using infrared thermal imagers of different bands to collect infrared radiance at different distances for the same infrared standard source, and combining the two infrared radiance data, the accurate horizontal atmospheric transmittance can be obtained. It can not only reduce the measurement equipment in the measurement of atmospheric transmittance, reduce the measurement time, but also improve the measurement accuracy. Through practical application, by comparing this method with the traditional method for measuring atmospheric transmittance, the measurement equipment can be reduced from more than 6 traditional ones to only two, the time can be saved by more than 80%, and the measurement uncertainty can be reduced from the traditional 20% to within 5%.

[0046] As Figure 4 、 Figure 5 shown, the embodiments of the present invention provide a device for measuring atmospheric air permeability based on infrared equipment. The device embodiments can be implemented by software, or by hardware or a combination of software and hardware. From the hardware level, as Figure 4As shown, it is a hardware architecture diagram of a computing device where a device for measuring atmospheric air permeability based on an infrared device provided by an embodiment of the present invention is located. In addition to Figure 4 the shown processor, memory, network interface, and non-volatile memory, the computing device where the device is located in the embodiment usually may further include other hardware, such as a forwarding chip responsible for processing packets, etc. Taking software implementation as an example, as Figure 5 shown, as a logically meaningful device, it is formed by the CPU of its corresponding computing device reading the corresponding computer program in the non-volatile memory into the memory and running it.

[0047] A device for measuring atmospheric air permeability based on an infrared device provided by this embodiment, the device includes:

[0048] A measurement unit 501, configured to respectively measure the infrared radiation luminance of an infrared standard source at a first distance and a second distance by using an infrared thermal imager; wherein, the first distance is less than the second distance, and the second distance is the same as the distance to be measured of the atmospheric transmittance;

[0049] A calculation unit 502, configured to calculate the atmospheric transmittance at the distance to be measured according to the infrared radiation luminance of the infrared standard source at the first distance and the second distance.

[0050] In an embodiment of the present invention, the measurement unit 501 may be used to execute step 100 in the above method embodiment, and the calculation unit 502 may be used to execute step 102 in the above method embodiment.

[0051] In an embodiment of the present invention, in the measurement unit 501, the infrared standard source is a standard blackbody, with a temperature of 10 - 150 °C, a radiation area of 500 × 500 mm, and an emissivity of 0.97.

[0052] In an embodiment of the present invention, in the measurement unit 501, before respectively measuring the infrared radiation luminance of the infrared standard source at the first distance and the second distance by using the infrared thermal imager, it further includes the step of calibrating the infrared thermal imager by using the infrared standard source.

[0053] In an embodiment of the present invention, in the measurement unit 501, the first distance is less than 1 meter.

[0054] In an embodiment of the present invention, when the calculation unit 502 calculates the atmospheric transmittance at the distance to be measured according to the infrared radiation luminance of the infrared standard source at the first distance and the second distance, it is used to perform the following operations:

[0055] Input the atmospheric temperature at the distance to be measured and the distance to be measured into the atmospheric path radiation calculation formula to obtain the atmospheric path radiation luminance at the distance to be measured;

[0056] Calculate the atmospheric transmittance at the distance to be measured based on the atmospheric path radiance at the distance to be measured and the infrared thermal imager at the first distance and the second distance.

[0057] In an embodiment of the present invention, in the calculation unit 502, the atmospheric transmittance at the distance to be measured is calculated by the following formula:

[0058] τ(L) = (R b '(L,t) - R a (L)) / R b (l,t)

[0059] In the formula, τ(L) is the atmospheric transmittance at the distance to be measured, R b '(L,t) is the infrared radiance measured by the infrared thermal imager when the temperature of the infrared standard source at the second distance is t, and R a (L) is the atmospheric path radiance at the second distance, and R b (l,t) is the infrared radiance measured by the infrared thermal imager when the temperature of the infrared standard source at the first distance is t.

[0060] It can be understood that the structure schematically shown in the embodiments of the present invention does not constitute a specific limitation on a device for measuring atmospheric air permeability based on an infrared device. In other embodiments of the present invention, a device for measuring atmospheric air permeability based on an infrared device may include more or fewer components than those shown in the figure, or combine certain components, or split certain components, or have different component arrangements. The components shown in the figure can be implemented in hardware, software, or a combination of software and hardware.

[0061] Regarding the information interaction, execution process, etc. between the various modules in the above device, since they are based on the same concept as the method embodiments of the present invention, the specific content can be referred to the description in the method embodiments of the present invention, and will not be elaborated here.

[0062] The embodiments of the present invention also provide a computing device, including a memory and a processor. A computer program is stored in the memory. When the processor executes the computer program, it implements a method for measuring atmospheric air permeability based on an infrared device in any embodiment of the present invention.

[0063] The embodiments of the present invention also provide a computer-readable storage medium. A computer program is stored on the computer-readable storage medium. When the computer program is executed by the processor, it causes the processor to execute a method for measuring atmospheric air permeability based on an infrared device in any embodiment of the present invention.

[0064] Specifically, a system or device equipped with a storage medium can be provided, on which software program code for implementing the functions of any one of the above embodiments is stored, and the computer (or CPU or MPU) of the system or device is caused to read and execute the program code stored in the storage medium.

[0065] In this case, the program code read from the storage medium itself can implement the functions of any one of the above embodiments, so the program code and the storage medium storing the program code constitute a part of the present invention.

[0066] Examples of the storage medium for providing the program code include a floppy disk, a hard disk, a magneto-optical disk, an optical disk (such as a CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW), a magnetic tape, a non-volatile memory card, and a ROM. Alternatively, the program code can be downloaded from a server computer via a communication network.

[0067] In addition, it should be clear that not only can the functions of any one of the above embodiments be realized by executing the program code read by the computer, but also by causing an operating system or the like operating on the computer based on the instructions of the program code to complete part or all of the actual operations.

[0068] In addition, it can be understood that the program code read from the storage medium is written into the memory provided in the expansion board inserted into the computer or into the memory provided in the expansion module connected to the computer, and then based on the instructions of the program code, the CPU or the like installed on the expansion board or the expansion module is caused to execute part and all of the actual operations, so as to realize the functions of any one of the above embodiments.

[0069] An embodiment of the present application also provides a computer-readable storage medium, on which at least one instruction, at least one program, a code set or an instruction set is stored, and the at least one instruction, at least one program, the code set or the instruction set is loaded and executed by a processor to implement a method for measuring the atmospheric air permeability based on an infrared device provided by the above method embodiments.

[0070] An embodiment of the present application also provides a computer program product, which includes a computer program. The processor of the computer device reads the computer program from the computer-readable storage medium, and the processor executes the computer program, so that the computer device executes the method for measuring the atmospheric air permeability based on an infrared device described in any one of the above embodiments.

[0071] It should be noted that in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0072] Those of ordinary skill in the art can understand that all or part of the steps for implementing the above method embodiments can be completed by hardware related to program instructions. The foregoing program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps including the above method embodiments; and the foregoing storage medium includes various media that can store program codes, such as ROM, RAM, magnetic disks or optical discs.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements 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 measuring the atmospheric air permeability based on an infrared device, characterized in that, The infrared device includes an infrared thermal imager and an infrared standard source. The method includes: Using the infrared thermal imager to measure the infrared radiation luminance of the infrared standard source at a first distance and a second distance respectively; wherein, the first distance is less than the second distance, and the second distance is the same as the distance to be measured for the atmospheric transmittance; Calculating the atmospheric transmittance at the distance to be measured according to the infrared radiation luminance of the infrared standard source at the first distance and the second distance.

2. The method according to claim 1, wherein The infrared standard source is a standard blackbody, with a temperature of 10 - 150 °C, a radiation area of 500×500 mm, and an emissivity of 0.

97.

3. The method according to claim 1, wherein Before using the infrared thermal imager to measure the infrared radiation luminance of the infrared standard source at the first distance and the second distance respectively, it further includes the step of calibrating the infrared thermal imager using the infrared standard source.

4. The method according to claim 1, wherein The first distance is less than 1 meter.

5. The method according to claim 1, wherein The calculating the atmospheric transmittance at the distance to be measured according to the infrared radiation luminance of the infrared standard source at the first distance and the second distance includes: Inputting the atmospheric temperature and the distance to be measured at the distance to be measured into the atmospheric path radiation calculation formula to obtain the atmospheric path radiation luminance at the distance to be measured; Calculating the atmospheric transmittance at the distance to be measured according to the atmospheric path radiation luminance at the distance to be measured and the infrared thermal imager at the first distance and the second distance.

6. The method according to claim 5, wherein The atmospheric transmittance at the distance to be measured is calculated by the following formula: τ(L)=(R b '(L,t)-R a (L)) / R b (l,t) where τ(L) is the atmospheric transmittance at the distance to be measured, R b '(L,t) is the infrared radiation luminance measured by the infrared thermal imager when the temperature of the infrared standard source at the second distance is t, R a (L) is the atmospheric path radiation luminance at the second distance, R b (l,t) is the infrared radiation luminance measured by the infrared thermal imager when the temperature of the infrared standard source at the first distance is t.

7. An apparatus for measuring the atmospheric air permeability based on an infrared device, characterized in that, The infrared device includes an infrared thermal imager and an infrared standard source. The apparatus includes: A measuring unit for using the infrared thermal imager to measure the infrared radiation luminance of the infrared standard source at a first distance and a second distance respectively; wherein, the first distance is less than the second distance, and the second distance is the same as the distance to be measured for the atmospheric transmittance; A calculating unit for calculating the atmospheric transmittance at the distance to be measured according to the infrared radiation luminance of the infrared standard source at the first distance and the second distance.

8. A computing device, including a memory and a processor. A computer program is stored in the memory. When the processor executes the computer program, the method described in any one of claims 1 - 6 is implemented.

9. A computer-readable storage medium, on which a computer program is stored. When the computer program is executed in a computer, the computer is made to execute the method described in any one of claims 1 - 6.

10. A computer program product, characterized in that, Including a computer program, which when executed by a processor, implements the method described in any one of claims 1 - 6.

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