Abstract
To better use ultrasonic phased array detection technology for underwater object detection and real-time imaging, an ultrasonic phased array launch system based on Gigabit Ethernet transmission was proposed in this work. The principle of phased focusing emission and the UDP communication protocol are analysed. Due to abundant I/O pin resources and internal logic resources, FPGA is used to excite the 32-channel ultrasonic phased array transducer, and the communication protocol is Gigabit Ethernet UDP. Generally, the delay parameters are sent to the FPGA in real time and high-speed, and then transmitted to the pulse signals. By using an integrated chip Max4940, the pulse signals are amplified and delivered to the phased array transducers. According to experiment, it is conformed that this system can transmit a large amount of data in real time at high speed; realize phase-controlled focus transmission, and the delay precision reaches 2.5 ns. This study provides a good hardware foundation for underwater imaging systems.
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