论文部分内容阅读
本文介绍了自行设计的机械扇形B型超声显象仪的基本原理。提出了仪器的主要技术指标,和应用“旋转变压器”和场效应管双向箝位以实现扇形扫描的方法。介绍了机头的结构设计和应用三角波触动机械的方法。并对对数放大器的原理作了说明。
This paper introduces the basic principle of a self-designed mechanical fan-shaped B-type ultrasonic display. The main technical indexes of the instrument are put forward, and the method of applying the “resolver” and the bidirectional clamp of the FET to realize the fan-shaped scanning is proposed. The structural design of the nose and the method of using triangular wave to touch the machine are introduced. The principle of logarithmic amplifier is explained.