An Improved Algorithm for Improving the Accuracy of Data Acquisition System

Abstract

In order to improve the measurement accuracy of various acquisition parameters in harsh environment, put forward of a new calibration algorithm. This design takes the AD7606 chip as the core, the hardware is designed to configure the filter as a 4-order Butterworth filter, and using high precision external reference voltage. In view of the complex data structure and large amount of data, using LabWindows and ActiveX technology to calculate the average and error of the data. The performance tests show that when the input range of the acquisition system designed using the above scheme is 0~5V and sampling rate is 50kbps, anti-aliasing filters work properly and perform well, the calibration algorithm reduces the data error and sampling precision is better than 1‰.