一种新的多探头金属磁记忆检测仪信号处理方法

A New Signal Processing Method of Multi-Probe Metal Magnetic Memory Testing Instrument

摘要: 金属磁记忆仪器采集到的信号的处理分析方法单一，在利用磁记忆信号切向最大值确定检测工件的情况时，主要是通过计算单个探头的梯度值来确定检测工件金属磁记忆信号的切向最大值，进而来确定应力集中情况及位置。由于方向唯一，常会造成漏检。提出了对探头之间信号的差异进行处理分析，来确定检测工件的应力集中情况和位置的方法，取得了较好的效果。

Abstract: The signal processing of metal magnetic memory(MMM) devices is performed mainly by calculating the gradient of the value of a single probe to determine the max of tangential MMM, and then to determine the location of stress concentration and injuries. Sometimes, defects are omitted with this method when detecting. A new way of signal processing was presented. By comparing signals from two sensors, it presents another way of determining the defects and their location.