分离式超声波发射接收系统设计

摘要

Based on the needs of specific applications of Scanning Acoustic Microscope (SAM),this paper describes a design of a separate ultrasonic pulser-receiver system and describes its m ain hardw are circuit design and softw are design,and verify its perform ance by applying it on the SAM. The system can reduce the cable reflections,m inim ize the signal attenuation. There is also less opportunity fornoise pickup and interference signalsto be added to the ultrasonic signal.The netresult is a low er distortion,stronger,clearer signal,w ith less noise and interference.%基于超声扫描显微镜的特殊应用需求，设计了一种分离式超声波发射接收系统，并介绍了其主要的硬件电路设计和软件设计，通过该系统在超声扫描显微镜上的应用验证了其性能。系统可有效减少线缆反射，将信号衰减降至最低，同时减少噪声和干扰信号拾取，从而得到一个低畸变、更强、更干净的超声波信号。