材料高温变形激光扫描测量方法

LASER SCANNING MEASUREMENT FOR HIGH TEMPERATURE DEFORMATION OF MATERIALS

基于激光狭缝扫描检测技术和红外测温技术 ,提出了一种用于材料高温变形量和线膨胀系数非接触自动测量的激光扫描测量方法和测量系统。本文详细论述了测量系统及其测量原理 ,并利用该测量系统对某种材料的高温变形或线膨胀系数进行了测量。实验结果表明 ,该系统可满足标距为 30～ 5 0mm试样在 10 0 0～ 30 0 0℃温度状态下材料变形的测量要求 ,测量精度可达± 3μm ,为研制新型特殊复合材料的高温性能和材料的合理使用提供了可靠依据。

A laser scanning measuring method and system is presented. It is used in the non contact measurement of the high temperature deformation of materials and their linear coefficient of expansion, based on the laser slit scanning measurement and the infrared temperature measurement technology. In this paper, the measuring system and measuring principle are discussed in detail. Using this measuring system, high temperature deformation or linear expansion coefficient of materials is measured. Experimental results manifest that the system works satisfactorily with samples at 1000℃ and 3000℃ and at standard distances from 30～50mm. Its measuring precision can reach ±3μm. The system can provide high temperature characteristics of new types or composite materials.