| 摘要 |
<p>An electrical conductor locating device comprises a pulse generator (10) and a detector. The pulse generator includes a transformer (12) with outputs (13,14) for connecting to two positions along the electrical conductor (15) to define a closed loop. The current in the closed loop produces an electromagnetic field around the conductor. The detector is comprised of a magnetic field sensor connected through a filter to the input of an amplifier. The output of the amplifier is connected to an indicator, such as a LED. When the sensor is moved perpendicularly closer to the conductor, it senses an increasing magnetic field strength so the amplifier drives the indicator at greater intensity. When the sensor is directly aligned with the conductor, the sensor is inside the equipotential point of the magnetic field where the field strength approaches zero, so the amplifier drives the indicator at close to zero intensity and thus pinpoints the conductor.</p> |
