基于电磁静力触探法的深埋金属管线探测探头设计与应用

Design and application of a probe for deep buried metal pipeline detection based on electromagnetic method and cone penetration method

设计一种基于电磁感应法的地下金属管线探头,其特点在于可以采用静压贯入的方式接近目标管线进行探测,在贯入的过程中可以实时读取电磁场的强度和锥尖阻力,从而安全地获取地下管线的空间位置信息,以防止对地下设施造成破坏。在设计中,探头创新性地利用感应线圈磁芯传递锥尖阻力,并使用非金属外壳防止信号屏蔽,拟通过滤波放大电路减少外界干扰。通过模型试验和现场试验,对探头探测效果进行验证,认为可以将管线埋深探测误差控制在5 cm以内,探测精度远高于现行规范要求。研究对深埋管线的高精度探测和地下管线保护具有积极意义。

This paper has designed an underground metal pipeline detection probe based on the electromagnetic induction method.The advantage of this probe is it can approach and detect the target pipeline by means of static pressure penetration.During the penetration process,the electromagnetic field strength and the cone tip resistance can be read in real time to obtain the location information of underground pipelines safely and prevent any damage to underground facilities.In the probe design,the magnetic core of an induction coil was used to transmit the cone tip resistance,the nonmetallic shell was also used to prevent signal shielding,and a filter amplification circuit was used to reduce external interference.Through model and field tests,the detection effect of the proposed probe was verified.The results showed that the detection error of the pipeline's buried depth can be controlled within 5 cm.This study has a positive significance for high-precision detection and underground pipeline protection of deep-buried pipelines.