虚拟多核数据采集技术的研究

Research on Virtual Multiple Cores DAQ Technology

提出了一种主要通过软件来拓宽数据采集仪动态范围的方法:虚拟多核数据采集技术。该方法利用1个A/D,对同一个输入信号进行多路连续扫描采集;然后由软件按照一定的规则对所采集到的数据再进行2次重采样,达到拓宽动态范围的目的。相比多核数据采集方法,该方法主要由软件来间接提高A/D的分辨率,具有成本低、可修改性强等优点;相比单核数据采集仪,该方法可使采集仪在高采样率工作时也能得到高的分辨率和大的动态范围。实验仿真结果表明方法理论上是可行的。

This paper presented a new way to widen the dynamic range of DAQ by software,called Virtual multiple cores DAQ technology.This method only used one A/D that worked in scanning to pick the same signal by multiple channels.Secondly,according to a rule software pick twice again from the data which had been transformed by the same A/D.The dynamic range of A/D is widening after three picking.Comparing with multiple cores DAQ technology,this way mainly wideh the dynamic range of A/D by software,therefore,it has low cost,easy to change and other advantages;comparing with common DAQ,multiple virtual cores DAQ has high picking rate,and has widely dynamic range.Simulation results show this theory is possible.