激光自动跟踪式引伸计的优化设计

摘要

According to laser automatic tracking technology, the light path and the motor control of a non-contract extensometer using LD structure light as scanning beam was optimized. By analyzing the relationship among the extensometer components, the range of parameters of the extensometer's mechanism was derived. The experimental and simulation results show that the designed extensometer has high measurement accuracy and can meet the requirement during whole specimen extension test.%通过将一类LD结构光作为扫描光线,结合激光自动跟踪技术对一种非接触式引伸计的机械组成与光路结构部分进行了优化设计.通过构建系统的数学模型和公式推导,分析了各组成部分之间的关系,通过仿真,确定了各参数的取值范围与适用条件.由实验验证了所设计的系统优化方案的正确性和可行性.实验结果表明,所设计的引伸计具有满足试件拉伸过程的全量程测量、测量结果精度高、结构方面易于实现等优点.