基于彩色CCD的高温温度场软测量系统的设计

Design of the system to soft measurement of high-temperature field based on color CCD image sensor

设计了一种由彩色CCD、图像采集卡、计算机和测量软件组成的高温场测量系统.利用比色测温原理计算并显示高温辐射体的表面温度场分布,通过调节进光量扩大CCD测温范围,利用黑体炉标定实验校正CCD光谱响应特性非理想带来的测温误差,并采用多光谱图像分割法去除各种噪声的影响.对工业现场进行测试结果表明,该系统具有较高的精确性和可靠度,符合工业生产对高温检测的要求.

The paper describes the design ot a hightemperature nero measuring , 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 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. By multispectrum segmenting, various hightemperature noises in the radiation color image are reduced or even eliminated. The test indicates that the measuring instrumentation meets the high-temperature detecting requirements of industrial production due to its high accuracy and reliability.