CN104748866A - Two-color thermometer and industrial camera fused temperature measurement method - Google Patents
Two-color thermometer and industrial camera fused temperature measurement method Download PDFInfo
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- CN104748866A CN104748866A CN201510176173.3A CN201510176173A CN104748866A CN 104748866 A CN104748866 A CN 104748866A CN 201510176173 A CN201510176173 A CN 201510176173A CN 104748866 A CN104748866 A CN 104748866A
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Abstract
The invention discloses a two-color thermometer and industrial camera fused temperature measurement method. The method is characterized in that overall temperature field measurement under ultra-high temperature is realized by infusion of a two-color thermometer and an industrial camera, and higher adaptation is achieved. The method includes the steps of 1), detecting temperature data of a to-be-measured area through the two-color thermometer and transmitting the temperature data to a computer; meanwhile, collecting image data, corresponding to the temperature data, of the to-be-measured area through the industrial camera and transmitting the image data to the computer; then converting the image data of the to-be-measured area into gray image data of the to-be-measured area in the computer, extracting the average value of the gray image data of the to-be-measured area and integrating the average value to the temperature data, establishing temperature and gray data points and matching to acquire the temperature-gray function relation; finally directly converting gray images collected through the industrial camera into a temperature chart of the area by the aid of the well determined temperature-gray function relation to acquire the temperature field of the whole area.
Description
Technical field
The invention belongs to a kind of temperature field measurement method, the fusion Two-color Measure Thermometer of whole regional temperature field and the thermometry of industrial camera under particularly can measuring superhigh temperature.
Background technology
Along with developing rapidly of science and technology, the experiment of the extreme environment such as high temperature, superhigh temperature and engineer applied get more and more, usually need in this case accurately to measure the temperature of material or environment, and instant record is carried out to temperature changing process so that for follow-up research provide data basis.In addition, the physical and mechanical property of material is all generally temperature correlation, in order to the performance under research material different temperatures just must be measured the temperature of material.Therefore, temperature survey is also the important problem of of scientific technological advance.
At present, the measurement instrument of the contacts such as thermocouple thermometer, resistance thermometer and semiconductor thermistor thermometer that what traditional surveying instrument was commonly used mainly comprise, is characterized in simple, intuitive and reliable.But owing to being subject to the restriction of contact material working temperature, its temperature-measuring range is generally limited in less than 2000 DEG C, and its poor dynamic, and the reaction time is long.The contactless thermometric instruments that development in recent years is got up mainly comprises: the monochromatic thermometer utilizing single band thermometric; Get the infrared thermometer of infrared band thermometric; Get full wave total radiation thermometer; Utilize the two-color thermometer etc. of the ratio of the radiation intensity of different-waveband.Its principle is all the thermal radiation property utilizing object, but emphasis is had nothing in common with each other.Be characterized in not needing to contact with measurand, relative to contact type thermometric indicator, can not disturb temperature field, and response is fast.But, often met difficulty in the temperature field in whole region under measurement ultra-high temperature.
Summary of the invention
Object of the present invention is exactly the temperature field in order to whole region under measuring ultra-high temperature, and devises a kind of new temperature field measurement method.
The technical scheme adopted is: the present invention is according to Si Tefan-Boltzmann's law, and the gross energy that black-body surface unit interval unit area gives off is directly proportional to the biquadratic of the thermodynamic temperature of black matrix.Size due to gray-scale value reflects the power of the energy of object radiation, and therefore gray-scale value and temperature also just exist certain correlativity.By finding out gray-scale value determination temperature corresponding under each different temperatures and the relation of gray scale, thus directly just temperature value can be obtained by gray-scale value.First, recorded the temperature variation data in region to be measured by Two-color Measure Thermometer, meanwhile, the region image data to be measured in industrial camera collection moment corresponding to temperature data.Then, extract the gray-scale value of digital picture in a computer and be integrated in temperature data, setting up temperature and grey strong point, matching obtains corresponding temperature-gamma function relation.Then, namely temperature-the gray-scale relation determined is utilized directly the gray-scale map of industrial camera collection to be converted to the hygrogram in region by computing machine.
Two-color Measure Thermometer and industrial camera have been merged in the present invention, both make use of Two-color Measure Thermometer result advantage more accurately on high-temperature temperature is measured, make use of again the advantage of digital picture on measurement of full field, the temperature field measurement in whole region under achieving ultra-high temperature.Compared with other thermometry, advantage of the present invention is as follows:
(1) temperature field measurement of the whole audience under high temperature is achieved;
(2) in temperature survey each time, all redefine temperature-gray-scale relation, and then utilize this relation to obtain the hygrogram in region by gray-scale map.Namely adaptability is greatly improved, and has broken away from the constraint of different condition in environment;
(3) to have broken away from radiation temperature measurement with the difference of material and temperature and the difficult problem such as emissivity changed.
Accompanying drawing explanation
Fig. 1 is heating experimental device in air
Fig. 2 is heating experimental device in vacuum tank
In Fig. 1: 1. base plate; 2. slide unit; 3. Two-color Measure Thermometer; 4. industrial CCD camera; 5. color filter; 6. brace table; 7. test specimen
In Fig. 2: 8. vacuum tank; 9. slide unit; 10. industrial camera; 11. Two-color Measure Thermometers; 12. color filters
Embodiment
Embodiment 1:
In Fig. 1, base plate 1 fixes slide unit 2, industrial camera 4, brace table 6, test specimen 7 is arranged on brace table 6; Regulate the camera lens of industrial camera 4, region to be measured on test specimen 7 is made to appear at industrial camera 4 within sweep of the eye, then be arranged on the camera lens of industrial camera 4 by the color filter 5 of 10% transmittance, and industrial camera 4 is connected with computing machine by capture card, sampling rate is decided to be 2S/s; Two-color Measure Thermometer 3 is arranged on slide unit 2, and temperature measurer 3 can be free to slide on slide unit, and regulate the position of temperature measurer 3 on slide unit to make its point for measuring temperature drop in region to be measured, temperature measurer 3 also connects on computers by capture card simultaneously, and sampling rate is 100S/s.
After experimental facilities is ready, adopt direct supply to heat test specimen, when temperature reaches 1000 DEG C, Two-color Measure Thermometer starts to record temperature data, and industrial camera is taken pictures to test specimen, so just obtain temperature data and view data in a computer.Convert digital picture to gray-scale map by program and extract the gray average of temperature measurer point for measuring temperature, simultaneously according to the temperature value in moment corresponding in the time Extracting temperature data of image, just obtaining a series of gray scale and temperature data points thus.According to the distribution of gray scale and temperature data points, occur supersaturation when temperature is more than 1400 DEG C, namely gray scale reaches the unchanged and temperature of maximal value also in continuous rising; According to the color filter of 5% transmittance, also not there is supersaturation more than 1600 DEG C in temperature, therefore needs the color filter selecting suitable light transmittance according to temperature-measuring range in actual applications.After obtaining gray scale and temperature data points, obtain the funtcional relationship of gray scale-temperature between 1000 DEG C-1400 DEG C by program matching.
Then, the digital picture of industrial camera collection is converted to gray-scale map immediately, and changes the gray-scale map in region to be measured into hygrogram by gray scale-temperature relation, obtain the temperature field in whole region to be measured thus.
Embodiment 2:
In Fig. 2,8 is vacuum tank, and observe inner test piece by quartz glass, material for test heats in vacuum tank; Two-color Measure Thermometer 11 can be free to slide on slide unit 9, and regulate the position of temperature measurer 11 on slide unit 9 to make its point for measuring temperature drop in test specimen region to be measured, temperature measurer 11 also connects on computers by capture card simultaneously, and sampling rate is 10S/s.; Regulate the camera lens of industrial camera 10, make region to be measured on test specimen appear at industrial camera 10 within sweep of the eye, be then arranged on by color filter 12 on the camera lens of industrial camera 10, and industrial camera 10 is connected with computing machine by capture card, sampling rate is decided to be 2S/s.
After experimental assembly is ready, adopt direct supply to heat test specimen, Two-color Measure Thermometer starts to record temperature data, and industrial camera is taken pictures to test specimen, so just obtain temperature data and view data in a computer.Convert digital picture to gray-scale map by program and extract the gray average of temperature measurer point for measuring temperature, simultaneously according to the temperature value in moment corresponding in the time Extracting temperature data of image, just obtaining a series of gray scale and temperature data points thus.After obtaining gray scale and temperature data points, obtained the funtcional relationship of gray scale-temperature by program matching.
Then, the digital picture of industrial camera collection is converted to gray-scale map immediately, and changes the gray-scale map in region to be measured into hygrogram by gray scale-temperature relation, obtain the temperature field in whole region to be measured thus.
Claims (1)
1. merge a thermometry for Two-color Measure Thermometer and industrial camera, it is characterized in that: the method has merged Two-color Measure Thermometer and industrial camera, achieve the temperature field measurement of the whole audience under ultra-high temperature, there is stronger adaptability; Its concrete steps are as follows:
(1) Two-color Measure Thermometer records the temperature data in region to be measured, and is sent on computing machine by temperature data; Meanwhile, the region image data to be measured that industrial camera collection is corresponding with temperature data, and view data is sent on computing machine;
(2) in a computer, above-mentioned region image data to be measured is converted to area grayscale view data to be measured, extract area grayscale view data average to be measured and be integrated in temperature data, setting up temperature and grey strong point, matching obtains corresponding temperature-gamma function relation;
(3) utilize the temperature-gamma function relation determined directly the gray-scale map of industrial camera collection to be converted to the hygrogram in region by computing machine, the temperature field in whole region can be obtained.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109855751A (en) * | 2019-01-29 | 2019-06-07 | 重庆大学 | High-temperature slag temperature optical calibrating device and method |
| CN110081981A (en) * | 2018-01-26 | 2019-08-02 | 隆基绿能科技股份有限公司 | Thermometry |
| CN110118610A (en) * | 2019-05-30 | 2019-08-13 | 北京卫星环境工程研究所 | Mixing temperature measuring system for superhigh temperature heat test |
| CN113804305A (en) * | 2021-09-14 | 2021-12-17 | 新疆有色金属工业（集团）有限责任公司 | Electric arc furnace flame temperature measurement method and system based on visual perception |
| WO2022056654A1 (en) * | 2020-09-15 | 2022-03-24 | 华为技术有限公司 | Temperature measurement method and temperature measurement apparatus |
| CN115060723A (en) * | 2022-05-31 | 2022-09-16 | 浙江大学高端装备研究院 | Metal temperature field measuring device and measuring method |
| CN115060723B (en) * | 2022-05-31 | 2024-07-09 | 浙江大学高端装备研究院 | Metal temperature field measuring device and measuring method |
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| CN103134599A (en) * | 2011-11-29 | 2013-06-05 | 中国科学院力学研究所 | Method and system for real-time monitoring of molten bath state in direct molding process of laser metal |
| CN103528694A (en) * | 2013-09-24 | 2014-01-22 | 电子科技大学 | Method for measuring temperature of target object by using thermal infrared imager |
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2015
- 2015-04-14 CN CN201510176173.3A patent/CN104748866A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103134599A (en) * | 2011-11-29 | 2013-06-05 | 中国科学院力学研究所 | Method and system for real-time monitoring of molten bath state in direct molding process of laser metal |
| CN103528694A (en) * | 2013-09-24 | 2014-01-22 | 电子科技大学 | Method for measuring temperature of target object by using thermal infrared imager |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081981A (en) * | 2018-01-26 | 2019-08-02 | 隆基绿能科技股份有限公司 | Thermometry |
| CN110081981B (en) * | 2018-01-26 | 2021-09-03 | 隆基绿能科技股份有限公司 | Temperature measuring method |
| CN109855751A (en) * | 2019-01-29 | 2019-06-07 | 重庆大学 | High-temperature slag temperature optical calibrating device and method |
| CN109855751B (en) * | 2019-01-29 | 2020-09-22 | 重庆大学 | Optical calibration device and method for high-temperature slag temperature |
| CN110118610A (en) * | 2019-05-30 | 2019-08-13 | 北京卫星环境工程研究所 | Mixing temperature measuring system for superhigh temperature heat test |
| WO2022056654A1 (en) * | 2020-09-15 | 2022-03-24 | 华为技术有限公司 | Temperature measurement method and temperature measurement apparatus |
| CN113804305A (en) * | 2021-09-14 | 2021-12-17 | 新疆有色金属工业（集团）有限责任公司 | Electric arc furnace flame temperature measurement method and system based on visual perception |
| CN113804305B (en) * | 2021-09-14 | 2024-04-09 | 新疆有色金属工业（集团）有限责任公司 | Arc furnace flame temperature measurement method and system based on visual perception |
| CN115060723A (en) * | 2022-05-31 | 2022-09-16 | 浙江大学高端装备研究院 | Metal temperature field measuring device and measuring method |
| CN115060723B (en) * | 2022-05-31 | 2024-07-09 | 浙江大学高端装备研究院 | Metal temperature field measuring device and measuring method |
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