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为了实现飞机系统模拟信号采集电路的小型化、实时性要求,本文提出了一种基于DSP+FPGA和多路模拟开关的通用实时模拟信号采集系统设计和实现方案。硬件架构上,系统采用FPGA实现了不同模拟量通道间的高速率、高可靠性切换;采用FPGA+DSP的数据处理架构,将数据采集与算法处理分开独立运行;采用表驱动技术,实现了不同模拟量通道的实时性要求;采用开关动态切换技术和模式配置实现了模拟信号的单端、差分、同步、BIT模式的归一化电路设计。软件架构上,系统采用模块化设计思路,采集层将每个通道的数据进行采集,解释层对每个通道采集值的解算并上报给应用层。实验表明该系统具备很强的数据采集与解算能力。
In order to realize the miniaturization and real-time requirement of the analog signal acquisition circuit of the aircraft system, this paper presents a design and implementation of a universal real-time analog signal acquisition system based on DSP + FPGA and multiple analog switches. Hardware architecture, the system uses FPGA to achieve high-speed, high-reliability switching between different analog channels; using FPGA + DSP data processing architecture, the data acquisition and algorithm processing separately run independently; using table-driven technology to achieve a different Analog channel real-time requirements; using switch dynamic switching technology and mode configuration of the analog signal single-ended, differential, synchronous, BIT mode normalized circuit design. Software architecture, the system uses a modular design ideas, acquisition layer data acquisition for each channel, the interpretation layer of each channel to collect the value of the solution and reported to the application layer. Experiments show that the system has strong data acquisition and resolution capabilities.