一种新的超声表面波测温方法研究

在材料科学和材料工程领域，对受热材料温度分布测量的需求一直在持续增长。这主要是因为对于材料的各种特性和行为，温度都是其重要参量。本文设计一种新的声表面波测量方法测量在加热或冷却过程中的材料表面的温度梯度。这种方法涉及到超声波回波测量和导热反问题的分析方法来得到材料中沿超声传播方向的一维温度场分布。为了证明方法的可行性，文章使用铝板进行了实验并得到了准确的材料表面温度场分布图像。超声测温技术将作为一种新型的热点技术，将有很大潜力被用在工业材料高温操作过程中的表面温度场成像。

Study on a new method for heated material temperature measuring

There is an increasing demand for temperature measurement of heated materials in fields like material science and material engineering. Temperature is a parameter of great importance to be tested when we try to explore features or behaviors of heated materials. The traditional way to do calls for the employment of a temperature-sensitive element. But time is needed for the temperature-sensitive element and the target environment to get a thermal equilibrium. When target environment changes continuously , it leads to a big indeterminacy. This paper offers a new method based on SAW( surface acoustic wave) to measure temperature gradient directly on the surface of heated material which can avoid the usage of temperature-sensitive element and the delay brought by the traditional way. Experiments on Al material showed expected results. With a new technology named laser-ultrasonic, acoustic thermometry as a new developed remote thermometry technology shows its power in high-temperature operation on materials.