介绍了以ARM芯片为核心器件,研制出低噪声、高分辨率的信号采集系统。该系统的噪声RMS值少于0.2 mV,显示出良好的抑制噪声的能力,而且系统分辨率达到10-4 mV数量级。随后,利用设计的信号采集系统,并结合研制的微型色谱系统,对瓦斯气体进行了检测实验。从实验结果可以看出,在痕量分析中,设计的信号采集系统具有对微弱信号采集的能力,而且具有较高的分辨率和较低的噪声,因此,设计的系统满足对微小信号采集的要求。 Introduced the ARM chip as the core device, developed a low noise, high resolution signal acquisition system. The system has a noise RMS value of less than 0.2 mV, shows good noise immunity and a system resolution of the order of 10-4 mV. Subsequently, using the designed signal acquisition system, combined with the developed micro-chromatographic system, the gas gas was tested. From the experimental results, it can be seen that in the trace analysis, the designed signal acquisition system has the ability to collect weak signals, and has higher resolution and lower noise. Therefore, the designed system meets the requirements of small signal acquisition Claim.