CN112857586A - Infrared temperature measuring device based on fpga and temperature compensation calibration method - Google Patents
Infrared temperature measuring device based on fpga and temperature compensation calibration method Download PDFInfo
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- CN112857586A CN112857586A CN202110023021.5A CN202110023021A CN112857586A CN 112857586 A CN112857586 A CN 112857586A CN 202110023021 A CN202110023021 A CN 202110023021A CN 112857586 A CN112857586 A CN 112857586A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 25
- 238000003331 infrared imaging Methods 0.000 claims abstract description 15
- 238000012634 optical imaging Methods 0.000 claims abstract description 5
- 230000005855 radiation Effects 0.000 claims description 27
- 230000003595 spectral effect Effects 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000005286 illumination Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 description 4
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 238000013499 data model Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 238000001931 thermography Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/06—Arrangements for eliminating effects of disturbing radiation; Arrangements for compensating changes in sensitivity
- G01J5/068—Arrangements for eliminating effects of disturbing radiation; Arrangements for compensating changes in sensitivity by controlling parameters other than temperature
Abstract
The invention discloses an infrared temperature measuring device based on fpga and a temperature compensation calibration method, wherein the method comprises the following steps: step one, combining a long-focus lens with a length of 70mm and a detector Tau2 into an optical imaging system; the focusing and zooming of the telephoto lens are accurately controlled by a modulation motor GM12-N20, so that the remote infrared imaging is realized; and secondly, connecting the FPGA processor with a detector, a temperature sensor, a light sensor, a distance sensor, a humidity sensor and an angle sensor, and implanting a compensation mechanism algorithm according to the data of the sensors to realize the remote temperature measurement of the infrared imaging. The invention adopts the FPGA-based remote infrared temperature measurement, and utilizes the real-time data of the self-sensor to combine with the temperature measurement algorithm and the temperature compensation algorithm to achieve the accuracy of +/-2 degrees at the remote infrared temperature measurement of 100 meters.
Description
Technical Field
The invention relates to an infrared temperature measuring device based on fpga and a temperature compensation calibration method, and belongs to the technical field of infrared temperature measurement and temperature compensation calibration.
Background
In the field of object temperature measurement, infrared imaging temperature measurement is widely applied due to the advantages of a non-contact measurement mode, a wide measurement range, high temperature measurement speed, high sensitivity and the like. The distribution of the infrared radiation energy of an object in terms of wavelength is very closely related to its surface temperature. Therefore, by measuring the infrared energy radiated by the object itself, the optical system of the thermometer is converted into an electric signal on the detector and the surface temperature of the object to be measured is displayed by the display part of the infrared imaging temperature measurement, so that the surface temperature of the object to be measured can be accurately measured. However, in the prior art, the sensing infrared temperature measurement cannot accurately measure the temperature of more than 100 meters, if the accurate temperature measurement of the remote infrared imaging is required to be realized, firstly the remote imaging is required to be realized, and secondly the key is to establish a temperature compensation mechanism and self-check.
In order to solve the technical problems, a new technical scheme is especially provided.
Disclosure of Invention
The invention aims to provide an infrared temperature measuring device based on fpga and a temperature compensation calibration method, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: an infrared temperature measuring device based on fpga and a temperature compensation calibration method comprise the following steps:
step one, combining a long-focus lens with a length of 70mm and a detector Tau2 into an optical imaging system; the focusing and zooming of the telephoto lens are accurately controlled by a modulation motor GM12-N20, so that the remote infrared imaging is realized;
and secondly, connecting the FPGA processor with a detector, a temperature sensor, a light sensor, a distance sensor, a humidity sensor and an angle sensor, and implanting a compensation mechanism algorithm according to the data of the sensors to realize the remote temperature measurement of the infrared imaging.
Preferably, the fpga-based infrared temperature measuring device and the temperature compensation calibration method further include an infrared radiation brightness formula of the object to be measured, where the infrared radiation brightness formula of the object to be measured is:
Lλ＝ελLαλ(T0)+(1-αλ)Lαλ(Tu)
wherein T is0Is the surface temperature of the object to be measured, aλIs the absorption rate of the surface of the object to be measured to the environment, TuIs ambient temperature.
Preferably, the fpga-based infrared temperature measuring device and the temperature compensation calibration method further include an infrared irradiation illuminance formula acting on the thermal imager, where the infrared irradiation illuminance formula acting on the thermal imager is:
Eλ＝A0d-2[τaλελLbλ(T0)+τaλ(1-aλ)Lbλ(Tu)+εaλLbλ(Ta)]
wherein epsilonλLbλTo surface emissivity, aλSurface absorption rate,. tauaλIs the spectral transmission of the atmosphere, epsilonaλIs the atmospheric build-up rate, T0Is the surface temperature, T, of the object to be measureduIs ambient temperature, TaIs the atmospheric temperature, d is the distance to the measured object, A0The visible area of the target corresponding to the thermal imager.
Preferably, the infrared temperature measuring device and the temperature compensation calibration method further include integrating the incident radiation in the working band of the detector, and converting the integrated radiation into an electrical signal proportional to the radiation amount, and converting the power of the infrared radiation into an electrical signal conversion formula, where the integrating the incident radiation in the working band of the detector is converted into an electrical signal proportional to the radiation amount, and the conversion formula of the power of the infrared radiation into the electrical signal is as follows:
VS＝∫Eλdλ×Ar×Rλ
wherein VSAn electrical signal to which the detector responds; rλThe spectral responsivity of the detector represents the capability of the infrared detector for converting an electric signal.
Compared with the prior art, the invention has the beneficial effects that: the invention adopts the FPGA-based remote infrared temperature measurement, and utilizes the real-time data of the self-sensor to combine with the temperature measurement algorithm and the temperature compensation algorithm to achieve the accuracy of +/-2 degrees at the remote infrared temperature measurement of 100 meters. Specifically, the method comprises the following steps:
(1) an optical imaging system is formed by combining a long-focus lens with the length of 70mm and a detector Tau 2; the focusing and zooming of the telephoto lens are accurately controlled by a modulation motor GM12-N20, and the long-distance infrared imaging is realized.
(2) The FPGA processor is connected with the detector, the temperature sensor, the light sensor, the distance sensor, the humidity sensor and the angle sensor, and a compensation mechanism algorithm is implanted according to the data of the sensors to realize the remote temperature measurement of the infrared imaging.
Drawings
Fig. 1 is a schematic diagram of the working principle of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to the attached drawings of the specification, the invention provides a technical scheme that: an infrared temperature measuring device based on fpga and a temperature compensation calibration method comprise the following steps:
step one, combining a long-focus lens with a length of 70mm and a detector Tau2 into an optical imaging system; the focusing and zooming of the telephoto lens are accurately controlled by a modulation motor GM12-N20, so that the remote infrared imaging is realized;
and secondly, connecting the FPGA processor with a detector, a temperature sensor, a light sensor, a distance sensor, a humidity sensor and an angle sensor, and implanting a compensation mechanism algorithm according to the data of the sensors to realize the remote temperature measurement of the infrared imaging.
The algorithm is as follows:
the infrared radiance (radiance within a unit wavelength interval at a given wavelength λ) of the measured object was:
Lλ＝ελLαλ(T0)+(1-αλ)Lαλ(Tu) (1-1)
wherein T is0Is the surface temperature of the object to be measured, alphaλIs the absorption rate of the surface of the object to be measured to the environment, TuIs ambient temperature. In (1-1), the first part represents spectral radiation on the surface of the measured object, and the second part represents reflected ambient spectral radiation of the measured object.
The infrared radiation illumination acting on the thermal imager is as follows:
Eλ＝A0d-2[τaλελLbλ(T0)+τaλ(1-aλ)Lbλ(Tu)+εaλLbλ(Ta)] (1-2)
wherein epsilonλLbλTo surface emissivity, aλSurface absorption rate,. tauaλIs the spectral transmission of the atmosphere, epsilonaλIs the atmospheric build-up rate, T0Is the surface temperature, T, of the object to be measureduIs ambient temperature, TaIs the atmospheric temperature, d is the distance to the measured object, A0The visible area of the target corresponding to the thermal imager.
Integrating the incident radiation on the working wave band of the detector, and converting the radiation into an electric signal in direct proportion to the radiation quantity, wherein the conversion formula of the power of the infrared radiation and the electric signal is as follows: vS＝∫Eλdλ×Ar×Rλ
Wherein VSAn electrical signal to which the detector responds; rλThe spectral responsivity of the detector represents the capability of the infrared detector for converting an electric signal.
Long-distance infrared compensation algorithm
For the same measured target object, the data measured by the infrared thermometer is different along with the difference of temperature measurement distance, and in order to improve the measurement accuracy of the infrared thermometer, the measured data needs to be compensated.
And (3) carrying out data relation between the measured temperature y and the standard temperature f (x, y), and obtaining a data model by combining the test distance x:
f(x，y)＝ax+by+cxy+kx2+my2+N (1-4)
and writing the mathematical model through an fpga processor, and calculating to obtain compensated compensation data at different distances. By the infrared temperature measurement basic data and the infrared compensation algorithm, remote infrared imaging temperature measurement is achieved.
The invention aims to solve the technical problem of remote self-checking infrared accurate temperature measurement based on the FPGA, and accurately measures the temperature of the surface of an object with the length of 5cm to 5cm by more than 100 meters. The specific technical scheme is as follows:
1. firstly, FPGA hardware is designed and connected with an environment temperature sensor, a humidity sensor, a light sensor, an equipment body temperature sensor, a distance sensor and an angle sensor;
2. designing an infrared imaging temperature measurement module, a long-focus infrared quick zoom lens and an infrared temperature measurement chip; and the remote thermal imaging infrared temperature measurement is realized.
3. The device automatically collects the data of temperature, humidity, light sensation, distance and angle sensors and selects the emissivity of the object type. And the FPGA hardware improves the measurement precision according to the sensor parameters, the emissivity automatic calibration and the temperature data compensation.
4. The infrared measured temperature data is locally stored, analyzed, and transmitted.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. An infrared temperature measuring device based on fpga and a temperature compensation calibration method are characterized by comprising the following steps:
step one, combining a long-focus lens with a length of 70mm and a detector Tau2 into an optical imaging system; the focusing and zooming of the telephoto lens are accurately controlled by a modulation motor GM12-N20, so that the remote infrared imaging is realized;
and secondly, connecting the FPGA processor with a detector, a temperature sensor, a light sensor, a distance sensor, a humidity sensor and an angle sensor, and implanting a compensation mechanism algorithm according to the data of the sensors to realize the remote temperature measurement of the infrared imaging.
2. The fpga-based infrared temperature measuring device and temperature compensation calibration method of claim 1, wherein: the fpga-based infrared temperature measuring device and the temperature compensation calibration method further comprise an infrared radiation brightness formula of the measured object, wherein the infrared radiation brightness formula of the measured object is as follows:
Lλ＝ελLαλ(T0)+(1-αλ)Lαλ(Tu)
wherein T is0Is the surface temperature of the object to be measured, alphaλIs the absorption rate of the surface of the object to be measured to the environment, TuIs ambient temperature.
3. The fpga-based infrared temperature measuring device and temperature compensation calibration method of claim 1, wherein: the fpga-based infrared temperature measuring device and the temperature compensation calibration method further comprise an infrared irradiation illumination formula acting on the thermal imager, wherein the infrared irradiation illumination formula acting on the thermal imager is as follows:
Eλ＝A0d-2[τaλελLbλ(T0)+τaλ(1-aλ)Lbλ(Tu)+εaλLbλ(Ta)]
wherein epsilonλLbλTo surface emissivity, aλSurface absorption rate,. tauaλIs the spectral transmission of the atmosphere, epsilonaλIs the atmospheric build-up rate, T0Is the surface temperature, T, of the object to be measureduIs ambient temperature, TaIs the atmospheric temperature, d is the distance to the measured object, A0The visible area of the target corresponding to the thermal imager.
4. The fpga-based infrared temperature measuring device and temperature compensation calibration method of claim 1, wherein: the infrared temperature measuring device and the temperature compensation calibration method further comprise the steps of integrating incident radiation on a working waveband of the detector, converting the incident radiation into an electric signal proportional to the radiation quantity, converting the power of the infrared radiation into an electric signal conversion formula, integrating the incident radiation on the working waveband of the detector, converting the incident radiation into an electric signal proportional to the radiation quantity, wherein the conversion formula of the power of the infrared radiation into the electric signal is as follows:
VS＝∫Eλdλ×Ar×Rλ
wherein VSAn electrical signal to which the detector responds; rλThe spectral responsivity of the detector represents the capability of the infrared detector for converting an electric signal.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116818111A (en) * | 2022-08-23 | 2023-09-29 | 哈尔滨工业大学 | Multispectral thermal imager for measuring ammunition explosion flame true temperature field |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104456336A (en) * | 2014-11-21 | 2015-03-25 | 广西智通节能环保科技有限公司 | Intelligent illumination moisture prevention and energy-saving ceiling lamp |
| CN108646393A (en) * | 2018-07-13 | 2018-10-12 | 嘉兴中润光学科技有限公司 | Telephoto lens |
| CN108692817A (en) * | 2018-04-11 | 2018-10-23 | 燕山大学 | Agitating friction welds transient temperature online test method |
| CN211015103U (en) * | 2019-12-29 | 2020-07-14 | 广州优客科技服务有限公司 | FPGA-based temporary data acquisition system |
| CN111459876A (en) * | 2020-04-01 | 2020-07-28 | 烟台北方星空自控科技有限公司 | FPGA system with EC function |
| CN211626712U (en) * | 2020-04-30 | 2020-10-02 | 深圳耐杰电子技术有限公司 | Novel infrared temperature measurement camera |
| CN112097922A (en) * | 2020-09-22 | 2020-12-18 | 深圳铯敏发科技有限公司 | Based on infrared temperature measurement module of thermopile |
-
2021
- 2021-01-08 CN CN202110023021.5A patent/CN112857586A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104456336A (en) * | 2014-11-21 | 2015-03-25 | 广西智通节能环保科技有限公司 | Intelligent illumination moisture prevention and energy-saving ceiling lamp |
| CN108692817A (en) * | 2018-04-11 | 2018-10-23 | 燕山大学 | Agitating friction welds transient temperature online test method |
| CN108646393A (en) * | 2018-07-13 | 2018-10-12 | 嘉兴中润光学科技有限公司 | Telephoto lens |
| CN211015103U (en) * | 2019-12-29 | 2020-07-14 | 广州优客科技服务有限公司 | FPGA-based temporary data acquisition system |
| CN111459876A (en) * | 2020-04-01 | 2020-07-28 | 烟台北方星空自控科技有限公司 | FPGA system with EC function |
| CN211626712U (en) * | 2020-04-30 | 2020-10-02 | 深圳耐杰电子技术有限公司 | Novel infrared temperature measurement camera |
| CN112097922A (en) * | 2020-09-22 | 2020-12-18 | 深圳铯敏发科技有限公司 | Based on infrared temperature measurement module of thermopile |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116818111A (en) * | 2022-08-23 | 2023-09-29 | 哈尔滨工业大学 | Multispectral thermal imager for measuring ammunition explosion flame true temperature field |
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