高集成度超声相控发射电路的设计  

Design of an Ultrasonic Phase-Controlled Transmitter with High Integration

作　　者：刘婧[1] 靳世久[1] 陈世利[1] 孙芳[1] 张聪颖[1] 

机构地区：[1]天津大学精密测试技术与仪器国家重点实验室,天津300072

出　　处：《传感技术学报》2010年第8期1106-1110,共5页Chinese Journal of Sensors and Actuators

基　　金：国家自然科学基金重点项目资助(60534050)

摘　　要：以往超声相控发射电路采用分立元件,集成度低,由多块发射电路板组成,存在由于板间不同步造成的误差,影响发射精度。本文提出了一种高集成度高精度发射电路的设计。该设计利用FPGA内部锁相环的倍频和移相的技术取代了延时线,并采用多个4通道的高压脉冲产生芯片和8通道高压模拟开关芯片,集成于一块电路板上,大大提高了电路的集成度,避免了板间不同步的问题。同时对该电路实现电子扫查进行了相控分析,并通过仿真和实验,证明了电路的可行性。The conventional ultrasonic phase-controlled transmitters are usually made of discrete components and low-integrated.The error caused by the asynchronization between the circuit boards maybe affects accuracy of transmission.A transmitter with high integration and accuracy is designed based on FPGA.The multiplier and phase-shifting of PLL in FPGA are used to replace the delay chips.It makes the circuit greatly high integrated that high-voltage pulse generator chips with 4 channels and high-voltage analog switch chips with 8 channels are chosen in the design.And the error caused by asynchronization can be avoided.After analyzing the delay time of the electronic scan the circuit has realized the phase-controlled transmission.The feasibility of the design is proved by the simulation and the experiment.

关 键 词：超声相控阵 相控发射 FPGA 电子扫查 

分 类 号：TN929.53[电子电信—通信与信息系统]