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《Chinese Journal of Sensors and Actuators》 2010-03
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Design and Implementation of High-Temperature Field Measuring Instrumentation Based on CCD Image Sensor

PENG Xiaoqi1,3,YAN Jun1,SUN Yuan21.School of Physics Science and Technology,CentralSouthUniversity,Changsha 410083,China;2.School of Information Science and Engineering,CentralSouthUniversity,Changsha 410083,China;3.Department of Information Science and Engineering,HunanFirstNormalUniversity,Changsha 410205,China  
This paper describes the design of a high-temperature field measuring instrumentation,which is composed of an optical lens,a color CCD camera,an image grabbing card,a computer and associated measuring software.Based on the two-color thermometry,the temperature distribution of the measured object can be calculated and then displayed on the screen.A method of automatically adjusting the amount of light is used to expand temperature measuring range of CCD,and blackbody furnace calibration experiments are adopted to calibrate the measurement errors caused by the non-ideal spectrum response character of CCD image sensor.Finally,an attenuation equalizer of radiation is built to compensate measuring temperature errors caused by smog interference.By testing on the industrial field,the maximum absolute error is 13.6 K,and the maximum relative error is 1.42%,the average computing time of each piece of radiation image is about 0.127 seconds.The test indicates that the measuring instrumentation meets the high-temperature detecting requirements of industrial production due to its high accuracy and reliability.
【Fund】: 国家自然科学基金重点项目资助(60634020);; 湖南省科技计划重点项目资助(2009FJ2003)
【CateGory Index】: TP216.1;TP212
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