针对现有空气动力学采集系统的可扩展性差,采集数据失真,价格昂贵等不足,设计了采用ARM Cortex-M3内核的STM32系列处理器的空气动力学数据采集系统.系统介绍了采集系统的信号调理和采集软硬件设计,针对传感器mV级信号输出特性,设计调理电路实现信号的调理功能,采用SD卡FAT32文件系统设计和大容量存储实现数据便捷取用,上位机实现串口调零程序编写.系统具有功耗低、性价比高、实时性强等特点,实验调试结果表明,各项指标均达到实际要求.%In view of the disadvantages of poor-expandability , poor anti-jamming capability and high cost of the existing aerodynarmcs data acquisition system,an aerodynamics data acquisition system based on ARM Cortex-M3 core was proposed. The paper introduced the design of data acquisition system,including the design of programmable signal conditioning board and acquisition board , PC software programming. The system designed signal conditioning circuit for mV-level sensor signal output , used FAT32 file system designed for SD card and mass storage to achieve data's convenient access. On PC,it developed Delphi programs to communicate with system from RS - 232. The entire system is portable,stable and low-power. Pratical testing shows that, the system fully meets the needs of requiremenls.
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