摘要
针对水下超声波相控阵成像系统的需求，设计并实现了一种高精度超声相控阵发射系统。该系统采用FPGA为控制核心，实现了0．5ns的高精度相控延时。同时采用高速三极管搭建驱动电路以实现16路超声触发信号的相控发射、电平转换-5功率放大等功能。系统可以通过设定各路的相控延时以实现相控超声波的高精度聚焦发射和偏转发射。经测试，系统实现了对超声相控阵挟能器的触发，井具有相控延时精度高、系统硬件复杂度低、驱动能力强、稳定可靠等特点，可以为提升相控阵系统的成像质量提供良好的基础。
In order to meet the requirement of underwater ultrasonic phased array imaging system, a high-precision underwater ultrasonic phased array transmitting system is designed and implemented. The system adopts FPGA as the control, core, and realizes the high precision phase controlled delay of 0.5ns. At the same time, a driving circuit is built by using a high speed triode to realize phase control emission, level conversion and power amplification of the 16 way ultrasonic trigger signal. The system can achieve high-precision focusing emission and deflection emission by setting various phase controlled delay. The actual test results showed that the system realizes triggering of ultrasonic phased array transducer, and the phase delay accuracy and low hardware complexity, driving ability, stable and reliable, it can provide a good foundation for improving the imaging quality of phased array system.
作者
樊宇航
谢昱勃
张学武
Fan Yuhang, Xie Yubo, Zhang Xuewu(School of Internet of Things Engineering, HoHai University, Changzhou 213022, China.)
出处
《现代科学仪器》
2017年第5期25-29,共5页
Modern Scientific Instruments
基金
国家自然科学基金（61671202）}国家重点研发计划（2016YFC0401606）,国家自然科学基金（61573128）,中央高校基本科研业务费专项资金资助（2015825214）共同资助
关键词
超声波
相控阵
发射系统
FPGA
Ultrasonic
Phased array
Transmission system
FPGA
