People have different reactions when they hear the following two words: metal detector. While the first thing that they think of is treasure hunting, others associate metal detection with airport security. On the other hand, metal detectors like Bounty Hunter Gold are tools used in a hobby called treasure hunting. Regardless of the scenarios that come to the mind, it is obvious that metal detection technology plays an important part in daily life, having a range of different uses. For this exact reason, there are so many Bounty Hunter gold detector reviews that analyze different technologies. What is interesting is that even though there are different technologies currently in use, metal detectors operate based on the same principles. So, how do they work exactly?
The encounter between magnetism and electricity
The truth is that magnetism and electricity are similar to an old married couple, which means that you cannot find one without the other. Basically each single time someone uses an electric appliance, they are relying on the connection between electricity and magnetism. Electricity is produced by a generator, which is a drum of copper wire, the moment when the wire rotates at high speed through the magnetic field, electricity is generated. The idea is that electricity produces magnetism and magnetism can be used to make electricity. The metal detector works in a similar way, which means that it produces an alternating magnetic field is created by the electricity that flows through the coil. When the electric instrument is moved over a metal object, it creates a form of magnetism. In short, when the magnetic field coming from the device causes another magnetic field to appear.
Types of metal detecting technologies
A metal detector can use one of the following technologies: Very Low Frequency (VFL), VFL Phase Shifting, Pulse Induction (PL) and Beat-frequency oscillation (BFO). VFL electronic devices have two distinct coils. The current that is moving through the transmitter coil creates an electromagnetic field and each time the current changes direction, the polarity of the magnetic field change as well. The polarity of the object’s magnetic field is opposite the coil’s magnetic field. VFL phase shifting detectors rely mostly on phase shifting, which represents the difference in timing between the transmitter coil’s frequency and he frequency of the target object. What happens is that an object with higher inductance will take longer to alter the magnetic field, while one with large resistance has a smaller phase shift. A PI system relies on reflected pulses, meaning that the magnetic fields from the target object add their echo to the reflected pulse. Last but not least, BFO technology generates radio waves and creates audible series of tones based on the difference between frequencies.
Ground signals and discrimination
Unfortunately, soils have magnetic properties and the property of the soils vary considerable. This means that signals may interfere with each other. The so-called mineralization process produces a range of signals. In order to determine if there are or there are not ferrous targets, the metal detector uses discrimination. Basically you can control the sensitivity of the device and eliminate any false signals that may appear.Read More