一种大动态范围自校正自定标计算机数据采集系统

A Kind of Gathering Data System With Large Dynamic Range of Input Signal and Automatic Scaling and Removing Zero - drift

在计算机中加入数字量输入输出功能,利用数字量控制A/D之前的信号放大电路,此放大电路具有2~0、2~1、2~2…2^(15)16个可选的增益值,利用计算机根据信号的大小自动选取最佳的增益值,使放大器的最后输出落入设定的窗口范围,利用计算机的运算能力可以消除放大器零漂的影响,同时消除增益的变化和非线性的影响。

Making computer has digital signal input / output ability, using digital signal control amplifying circuit. This circuit has 20、21、22…215,16 selectable gains according to signal size the computer selects the bset gain automatically. It makes amplified signal fall into a specifc window range. Utilizing computer opration ability we can remove affection of both zero drift and variety of gain.