中文摘要：

信号输出回路特性是影响电磁法水下金属管线探测仪探测深度和探测精度的重要因素,本文针对人工源电磁法探测水下金属管线埋伏深度的问题,建立了电磁信号发送机输出回路的物理模型,推导了信号输出回路基本特性的数学表达式,计算了不同长度金属管线输出回路的截止频率,并对不同激励信号下输出回路的响应进行了计算机仿真,为人工源电磁法水下金属管线埋深探测的方法选择、发送机设计与开发、输出回路布设提供依据.

英文摘要：

The characteristics of signal transmitting loop is an important factor which affecting the detecting depth and precision of electromagnetic underwater metal pipeline detector,aiming at the depth detecting of under water metal pipe by active source electromagnetic method,established a physical model of electromagnetic signal transmitting loop,calculated mathematical expressions and cut-off frequency of signal transmitting loop under different length of metal pipes,and simulated the responses of signal transmitting loop under different excitation signals by computer.The paper provided the basis for the detection of underwater metal pipe by active source electromagnetic method,it’s helpful to the designing of metal pipe detector and the building of signal transmitting loop,and increased the possibility of improving detection accuracy and depth of under water metal pipe finder.