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本文介绍了几种动态和静态应变测量中的恒流源电路及其相应的后级放大电路,进一步论证和分析了恒流源电路用于应变测量的优点。文中还提出了一种基于恒流源电路的 KGS—1型瞬态应变仪,并给出了恒流源电路用于测试动态应力强度因子的应用实例。
In this paper, several kinds of constant current source circuits and their corresponding post-stage amplifier circuits in dynamic and static strain measurements are introduced. The advantages of constant current source circuits for strain measurement are further demonstrated and analyzed. The article also presents a KGS-1 transient strain gauge based on a constant current source circuit, and gives an example of the application of a constant current source circuit for testing the dynamic stress intensity factor.