Design of Multi-Channel Signal Acquisition and Transmission Unit Based on Multi-core DSP

Based on the increasing requirements for the number of hydrophone channels, sampling rate and real-time data processing in underwater acoustic signal processing, a multi-channel signal acquisition platform is designed and implemented in this paper. As an important part of the underwater positioning and navigation system, the multi-channel signal acquisition platform is responsible for implementing the control of the entire system. The platform aims to realize the collection and transmission of high-speed real-time multi-channel hydrophone signals and various external serial port signals. According to the system design requirements, this paper selects the quad-core DSP TMS320C6674 and Cyclone IV GX series FPGA as the core processing device of the platform, can realize the real-time sampling of 32-channel 200kHz sampling rate and the reception of 4 channels of serial information. It uses PCIE and Gigabit Ethernet interfaces as data transmission interfaces, and the system has a high transmission rate. After the system joint tuning, the correctness of the design of each module was tested, and the transmission rate and packet loss rate of the system were tested through a long-term copy machine to prove that the system can work stably for a long time and meet the system design expectations.