多探头双频超声波接收电路设计

摘要

该文创新设计了一种多个双频超声波探头的超声波接收电路，适用于海洋鱼类资源探测等需要用到多个超声波探头的场合。该接收电路由前级放大电路，开关切换电路，带通滤波电路和后级放大电路组成。DSPIC单片机负责控制，接收电路多对一分时切换。采用了收发隔离电路，使得超声波探头可以工作在收发一体的工作方式，有效的节约了电路和探头的成本。%That paper provides a innovative design of Multi-probe and Dual Frequency ultrasonic Receiving circuit,suitable for marine ifsh resources detection which need to use multiple ultrasonic probe and so on.The receiving circuit consists of pre-ampliifer circuit,switch circuit,the band-pass iflter circuit and the post-stage ampliifer circuit.The DSPIC MCU is responsible for control ing the circuit and the receiving circuit switched by time.That design use an isolation circuit,so that the ultrasonic probe can operate in the transceiver mode,effectively saving the cost of the circuit and probe.