一种新型的数据采集系统性能量化方法的研究

考虑到数据采集系统的精度对应于系统对信号的不失真传输及系统本身的时间稳定性问题,提出了一种新型的数据采集系统性能量化方法。该方法将数据采集系统看作为一个开环的线性时不变系统,把采集系统本身看作滤波器,其输入为需要采集的信号,输出为采集到的信号,然后利用LMS算法的基本原理反推通道模型参数,最后利用求得的模型参数计算数据采集系统对正弦信号的传输特性,实现了对数据采集系统的性能考核。对系统模型和量化方法的数学仿真结果表明,所采取的量化方法和系统模型精确地反映了数据采集系统的正弦信号的响应,可以作为实际数据采集系统的精度考核手段。

Research of a New Method of Performance Quantization of Data Acquisition System

Considering that precision of a data acquisition system corresponds to distortion less of signal transmitted by the system and the problem of time stability of the system,the paper put forward a new method of performance quantization of data acquisition system.The method regards data acquisition system as an open-loop linear time-invariant system and takes the system as a filter,whose input is the signal needed to acquire and output is the gathered signal.Then it reveals model parameter of channel by basic principle of LMS algorithm.Finally it calculates transmission characteristics of sinusoidal signal by use of received model parameter,so as to realize performance test of the data acquisition system.The mathematical simulation results of the system model and the quantization method showed that the quantization method and the system model respond to sinusoidal signal's response of the data acquisition system precisely,which can be used as a precision evaluation measure of actual data collection system.