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基于FPGA的超声相控阵发射系统设计

更新时间：2020-08-10 07:59:39 大小：233K 上传用户：songhuahua 查看TA发布的资源 标签：fpga 超声相控阵 下载积分：5分评价赚积分（如何评价?）收藏评论(0) 举报

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为了实现水下超声成像系统中超声信号的相控阵发射,提出并设计了一种基于FPGA的超声相控阵发射系统。分析了相控聚焦的发射原理,利用FPGA丰富的I/O引脚和内部逻辑资源实现了八通道超声相控阵激励信号的发射,并设计了信号调理电路对激励信号进行D/A转换及放大,以有效驱动压电换能器。通过实验测试表明,该系统可以实现超声信号的相控聚焦发射,相控延时精度达到2.5 ns,发射信号稳定,系统集成度高,可以应用于水下超声成像的实现。

In order to enhance the ultrasonic signal phased array transmission of underwater ultrasonic imaging system,the ultrasonic phased array transmission system based on FPGA was designed. The transmission principle of phased focus was analyzed,and the eight channel ultrasonic phased array transmission system was achieved by using FPGA with rich I / O pins and internal logic resources. Then the signal conditioning circuit for excitation signal D / A conversion and amplification were designed to motivate the piezoelectric transducer effectively. The actual test results show that the system realizes ultrasonic signal phased array focus transmission,and the phase delay precision is 2. 5 ns. The system is with high integration and stable...