Continuous-depth-indicating underground pipe and cable locator

摘要: An underground pipe and cable locator for continuous depth readings comprises a top bottom receiver antenna sensor each connected to respective amplifier channels. A separate transmitter is used stimulate electromagnetic radiations from buried pipe, cable, or other electrical conductor. The sampled synchronize phase locked loop controlled oscillator. exceedingly faint noise-riddled signals obtained the sensors are full-wave rectified without use of rectifiers diodes that can introduce distortions offsets. Such by synchronously switching between inverted non-inverted copies with an analog switch such only positive cycles output in one pulse train. therefore obtainable sensors, this, turn, permits display estimate