基于取样积分技术的数据采集系统

Data Collecting System Based on Sampling Integral Technology

为了实现从强噪声中提取微弱信号,设计了一种基于取样积分技术的数据采集系统,并就系统的结构、设计中的关键电路进行了研究,提出了一套完整的信号采集方案。系统中以积分电容作为取样信号的载体,积分的过程本身就是信号累加的过程,因此避免了在传统密集采样过程中数据量庞大及数据处理难的问题,实现了从强噪声中提取毫伏级信号。实验结果表明,取样积分方法改善了系统的信噪比,提高了信号的识别能力(在无需放大条件下,可检测的有效信号的动态范围达130 dB),在具体应用中取得了良好的效果。

The data collecting system based on the sampling integral technology is designed to detect weak signal from the strong noise, carries through the research on the system structure and the key circuit designed, and puts forward a integral project on signal collecting. In the system, integral capacitance is the carrier of sampling. The process of the integral is the process that the signal is added. It avoids the data processing problem in the tradi- tional sampling process because of the data being too huge, and carrys out to withdraw milli-volt level signal from the strong noise. The experiment results indicate that the sampling integral method improves the signal noise ratio, develops the ability to identify signals （under the condition which have no use for enlarge, it can examine the dynamic scope of valid signal up to 130 dB）, and obtains good results in the application.