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1.前言目前,光弹性应力分析方法在科研和工程技术中已获得了较为广泛的应用。然而数据的采集和处理工作却是靠人工进行的,工作量大而且效率低。大约从本世纪60年代开始,世界各国许多从事应力分析的专家们,花费了不少精力致力于寻求使这一古老的方法实现自动化,较有成效且有商品出售的要数美国Vishay公司的401型自动偏光仪。这套装置比较复杂,价格昂贵,而且整个测量过程中偏振系统是不停地转动的,不仅产生噪音而且由转动引起的振动还会破坏光路的初始调整位置,影响测量精度。
1. Introduction At present, the method of photoelastic stress analysis has been widely used in scientific research and engineering. However, the collection and processing of data is carried out manually, with a heavy workload and low efficiency. About 60s from the beginning of the 20th century, many stress analysis experts from all over the world devoted a great deal of effort to seeking to make this ancient method of automation, more effective and the sale of goods to the United States Vishay 401 Automatic Polarizer. The device is complicated and expensive, and the polarization system is constantly rotating throughout the measurement. Not only noise but also vibration caused by the rotation can destroy the initial adjustment position of the optical path, which affects the measurement accuracy.