【摘要】 传统模拟信号采集板卡的低通信速率已成为高性能飞控测试系统功能的"瓶颈",针对这一问题,设计了一种以FPGA为核心的总线型高速数据采集板卡。板卡中信号调理电路有效抑制了模数转换中的零点温度漂移等问题,专用的模数转换芯片提高了采集精度。BLVDS总线与Modbus协议的应用使板卡具有模块化、网络化的功能。设计过程中充分利用QuartusII软件平台,完成了逻辑电路的仿真验证和调试。实际应用表明,该板卡稳定可靠、扩展方便、精度高,能够满足多种场合信号采集的需要。更多还原

【Abstract】 A high speed data acquisition board is designed to solve the problem that low communication rate of traditional A/D boards has already become a critical bottleneck of autopilot test system with high performance requirements.Zero temperature drift is solved by conditioner circuit of the board,and the dedicated ADC chip significantly improves the sample accuracy.The design of BLVDS and Modbus protocol extend the function of modularization and network communication.The system emulation and debugging are implemented using QuartusII software,and all functions of this board are validated via practical application.更多还原