一、前言目前在国内应用于动应力与动频率有线测量时,均采用各种引电器,以便将动态讯号转化为静态讯号,便于测量。常见的引电器无非是水银式和接触式(端面或径向)两类。为了进行动应力与动频率的测量,我们于六二年设计并制造了径向接触式引电器,该引电器经过一段时间的试验考验基本上能满足要求,但它存在着一定的不足,主要是高转速虚应变大,碳刷磨损严重。为了克服上述缺点,于六九年我们领导、工人与技术员三结合并参考了兄弟单位的宝贵经验,设计并制造了端面接触式引电器。这是伟大的无产阶级文化大革命的丰硕成果。端面接触式引电器具有运行平稳。虚应变小等优点,经过鉴定试验和多年实际应用证明性能良好,适于 I. Preface At present, when applied to wired and measured dynamic and dynamic frequency in China, all kinds of inductors are used in order to convert the dynamic signal into a static signal for easy measurement. Commonly known as a mercury-free and contact-type (end or radial) two categories. In order to carry out dynamic stress and dynamic frequency measurement, we designed and manufactured radial contact type inductors in 2012. The prototype test can basically meet the requirements after a period of tests, but it has some shortcomings, mainly Is a high speed virtual strain, brush serious wear. In order to overcome the above shortcomings, in 1996, our leaders, workers and technicians combined and consulted with the valuable experience of our fraternal units and designed and manufactured end-face contact type inductors. This is the fruitful achievement of the great Great Proletarian Cultural Revolution. End-face contact with the smooth operation of the instrument. Small virtual strain and other advantages, after the identification test and years of practical application proved good performance, suitable