GPS Metal Detectors
GPS Metal Detector is an electronic
device used to detect buried metallic materials in the ground assisted
or used with the benefits of GPS (Global Positioning System) tracking.
With a GPS featured metal detector one can systematically zero in and
track one's positions in your search for: coins, gold, landmines, cables,
pipes, underground storage tanks and piping.
A GPS Metal Detector consists of an oscillator producing an alternating
current that passes through a coil producing an alternating magnetic field.
In addition to the above features, GPS Metal Detectors use electromagnetic
induction to detect metal.
According to the classification
of the magnetic field generated by the transmit coil, there are two major
types of GPS Metal Detectors.
1. Continuous Waves Detectors (CWD):
It generates a transmitter coil current. This coil current alternates
at a fixed amplitude and frequency. The presence of metal targets is revealed
by small changes in the phase and amplitude of the receiver voltage.
2. Pulse Induction Detectors (PID):
It generates a transmitter current which turned on a time, and suddenly
turned off. In the target, the collapsing field generates pulsed eddy
Metal Detectors have developed a
long way, from the simple Metal Detector to sophisticated electronic metal
detectors using GPS tracking.
In the future, we hope to see more modern
computerized technology incorporated into Metal Detectors offering greater
sensitivity and detection depth to track metallic objects.