In order to accurately acquire the multi-channel analog signals at different sites in the spaceflight measurement field,a acquisition system was designed and implemented,which has 6 sensor nodes for 1 meter,and each node has 10-chan-nel analog signal. The Spartan-6 FPGA is taken as the core chip of the system to control the analog-to-digital conversion module with 24-bit,RS 485 bus transmission module with 40 Mb/s,and USB interface module. The system can simplify the previous test system greatly,improve the reliability of data acquisition and stability of system working,and is widely used in the space-flight test system with high precision requirement.%针对在航天测试领域中对多个地点处多路模拟信号进行精确采集的需求,设计了相距1m的6个传感器节点,每个节点10路模拟信号的采集系统.该系统以Spartan-6 FPGA为核心芯片,控制24位精度的模数转换模块、40 Mb/s传输速率的RS 485总线传输模块和USB接口模块的工作,大大简化了以前的测试系统,并提高了采集数据的可靠性和系统工作的稳定性,可广泛应用于对精度要求较高的航天测试系统.
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