掩埋的公用事业检测原理

Undertaking any excavation will inevitably bring site workers into close proximity to underground utilities (electricity, gas, telecommunications, water). Consideration should always be given to knowing the exact location of all buried utilities before and during the excavation process. To safeguard against utility strikes, a cable locator is used for detecting the presence and proximity of buried utilities.

当交流电流（AC）沿电缆行驶时，会产生电磁场。交流电流不仅会产生磁场，而且还会产生正面和负之间的电流的振荡，从而产生了一种称为HERTZ（HZ）的频率。由AC电流产生的电磁场可以由电缆定位器检测到。