对电磁式地下金属管线探测仪极值测深法的改进

AN IMPROVEMENT TO EXTREMUM DETECTION DEPTH METHOD OF ELECTROMAGNETIC UNDERGROUND METAL PIPE DETECTOR

本文首先分析了沿用已久的电磁式地下金属管线探测仪极值测深法计算公式存在的系统误差，然后采用线性最小二乘法对实测数据进行拟合。

This paper analyses the systemetic error of calculating formula of extremum detection depth method of undergound metal pipe detector,fites for experimental data by means of linear least square method and obtains the modifying factor of the formula.