仪表技术与传感器
儀錶技術與傳感器
의표기술여전감기
INSTRUMENT TECHNIQUE AND SENSOR
2015年
7期
54-56
,共3页
崔娟%王红亮%何常德%薛晨阳
崔娟%王紅亮%何常德%薛晨暘
최연%왕홍량%하상덕%설신양
水下超声成像%相控阵%相控聚焦%FPGA%信号调理电路%压电换能器
水下超聲成像%相控陣%相控聚焦%FPGA%信號調理電路%壓電換能器
수하초성성상%상공진%상공취초%FPGA%신호조리전로%압전환능기
underwater ultrasonic imaging%phased array%phased focus%FPGA%signal conditioning circuit%piezoelectric trans-ducer
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。
為瞭實現水下超聲成像繫統中超聲信號的相控陣髮射,提齣併設計瞭一種基于 FPGA 的超聲相控陣髮射繫統。分析瞭相控聚焦的髮射原理,利用 FPGA 豐富的 I/ O 引腳和內部邏輯資源實現瞭八通道超聲相控陣激勵信號的髮射,併設計瞭信號調理電路對激勵信號進行 D/ A 轉換及放大,以有效驅動壓電換能器。通過實驗測試錶明,該繫統可以實現超聲信號的相控聚焦髮射,相控延時精度達到2．5 ns,髮射信號穩定,繫統集成度高,可以應用于水下超聲成像的實現。
위료실현수하초성성상계통중초성신호적상공진발사,제출병설계료일충기우 FPGA 적초성상공진발사계통。분석료상공취초적발사원리,이용 FPGA 봉부적 I/ O 인각화내부라집자원실현료팔통도초성상공진격려신호적발사,병설계료신호조리전로대격려신호진행 D/ A 전환급방대,이유효구동압전환능기。통과실험측시표명,해계통가이실현초성신호적상공취초발사,상공연시정도체도2．5 ns,발사신호은정,계통집성도고,가이응용우수하초성성상적실현。
In order to enhance the ultrasonic signal phased array transmission of underwater ultrasonic imaging system,the ul-trasonic 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 log-ic 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 transmission,and it can be ap-plied to the underwater ultrasonic imaging implementation.
