Metal detectors and metal detector applications electromagnetic induction to detect metal objects through their conductivity.
The best metal detector is used to detect metal objects hidden somewhere, or of weapons such as knives, guns, … From that computer applications in the field of airport security checks, references ancient, geology, find the treasure, find unexploded objects…
Metal detectors are also used in the construction industry to detect metal reinforcement in concrete, metal pieces mixed in, or the metal wires are placed in the walls and on the floor.
- Operating principle
General principle is to use metal detectors played coils, generate electromagnetic fields in the environment, and the coil receiver to collect the sensor in space effective detection of the probe.
Without metallic foreign bodies, receiver coil obtained only normal school. When a metal object appears conductivity induced current (eddy current), deflection coil in the receiver field. School deviation dependent conductivity, size and distance to the object probe. [Read more…]