一种微电阻率扫描仪信号分析和处理方法

摘要

According to AM signals the micro-resistivity imaging scanner used,the paper provides a method to calculate the carrier phase and envelope amplitude and focuses on the introduction of carrier phase acquisition,First,the paper introduces a measuring methodology of carrier phase and envelope amplitude based on band-pass sampling and digital quadrature demodulation theoretically.Secondly, after simulating and verifying on LabVIEW,this methodology can measure the carrier phase and envelope amplitude of AM signals at a high accuracy under normal temperature and high temperature conditions.%针对新型的微电阻率成像扫描仪使用的幅度调制信号的特点,提出一种载波相位和调制波幅度的计算方法,重点研究载波相位提取。首先从理论上系统地介绍了基于带通采样和数字正交解调的载波相位和调制波幅度的测量方法,然后通过LabVIEW仿真验证,该方法能实现常温和高温条件下幅度调制信号的载波相位和调制波幅度的高精度测量。