基于比色原理的瞬态温度测试系统

Transient temperature measurement system based on colorimetric principle

针对传统瞬态温度测试中存在的破坏被测温度场分布、使用寿命短、响应速度低等问题,设计一种基于比色原理的瞬态温度测试系统。介绍系统的结构以及测温原理,为提高整个系统的易用性,对系统进行小型化设计。其中,对滤光片与两象限探测器进行一体化设计,利用单片机完成实验数据的处理以及结果的实时显示,最后对整个系统进行封装。由高温黑体炉对系统进行静态标定来获得系统的静态系数K。在实验室环境中,利用氢氧焰机加热靶体的方式模拟瞬态温度场。同时利用已标定过的比色测温系统以及红外测温仪Modline5测量瞬态温度,在600~1 200℃的测温范围内,两者的误差<1%,可以满足瞬态温度测试的要求。

In orderruined temperatureto solve problemsfield distribution,in traditional measurement of transient temperature, such asshort service life and slow response speed, a transienttemperature measurement system based on colorimetric principle is designed, and its structure andmeasurement principle are introduced. To improve the usability of the system, compact design isadopted by the system. The filter and two-quadrant detector are integrated. SCM is used tocomplete test data processing and real-time display of results. Finally, the whole system ispackaged. The colorimetric temperature measurement system was calibrated by high-temperatureblackbody furnace and the static calibration coefficient K is gained. In a lab environment, thetransient temperature field is simulated by heating the target with the hydrogen-oxygen flamemachine. At the same time, calibrated colorimetric temperature measurement system and infraredthermometer Modline5 are used for transient temperature measurement. The result shows that therelative error between them is less than 1% within a temperature range of 600-1 200 ℃, whichmeets the transient temperature measurement requirements.