What Is A Pulse Induction Metal Detector ?

Started by gash, June 02, 2018, 12:14:54 am

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Metal detector technology has been used for a number of decades to locate various metallic artefacts and precious metallic ores. An uncommon, but accurate metal detector is the Pulse Induction Metal Detector. It uses Pulse Induction Technology to find metals.

In Pulse Induction technology, a coil is used as a transmitter and receiver. Pulse Induction metal detectors are likely to have a single coil, but there are others that have additional coils. Powerful pulses of current are sent through the coil. The pulses create magnetic fields that are used to reverse the polarity and cause electrical bursts or spikes. These only last a few microseconds and are constantly repeated.

Pulse Induction technology creates opposite magnetic fields that can be detected through the pulse in order to locate metals. When the pulse runs through a metal, it lasts a little longer than it would without the metal there. A monitor that is used within a sampling circuit detects the resulting pulse. The pulse's expected length is calculated and compared to the actual length. When there is an anomaly, the circuit picks up and transmits the signals to an integrator, which is designed to read the signals and convert them into a direct current that an audio circuit can read.

The audio circuit monitors the anomalies and generates chirps that vary in tone and pitch. The tone that is generated indicates the type of metal that the Pulse Induction Metal Detector detects. Although Pulse Induction, by nature, does not always accurately determine which metals are which, very different metals are distinguishable.

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