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There are different fields that are taking advantage of metal detectors. For instance, you’ll see them being used in airports and several other security checkpoints, military mine fields, beach-combers as well as geophysical prospectors. Not only that, metal detectors are also categorized under radar family since many uses radar in their systems. Some other members of detector radar family include weather radar systems, cordless radar systems and car radar detector systems.
Basically, metal detectors are made up oscillator that’s producing alternating current that passes through a coil that creates alternating magnetic field. What is meant by this is, when an electronically conducive metal comes close to the detector, it is creating eddies of air that is causing a change in magnetic field. And this is what allows the operator to find where the metal object is located.
In most cases, the handheld detectors are what commonly used. The truth is, these handheld detectors have the capability of finding landmines. As for deep metals however, it will require the use of a ground penetrating radar partnered with a metal detector to unearth the hidden metal.
There is actually an interesting history that metal detectors have. The very first metal detectors were introduced in the late 19th century. Original inventors of the concept hoped to create an easier way of finding ore for the miners. Then, one physicist, Heinrich Wilhelm Dove has invented induction balance system during those days but, it took a century for others to finally see the need for this idea.
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Early iterations of the systems however were complex and consumes lots of battery power. In 1930s, modern models are starting to surface. It was Gerhard Fisher who first patented the metal detector. He has discovered metal detecting by accident actually when he found discrepancy in radio navigational methods he uses. And throughout the Second World War, his model was put to the test because there are surplus of detectors lying around. The past time of trying to find metal for entertainment was then formed.
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Aside from being a useful tool, it is quite entertaining as well. It’s somewhat hard to imagine to not seeing one as almost everyone comes contact with metal detectors. It is also interesting that such detector is also part of detector radar family. Well, this is because of the reason that various detectors are using cordless radar system into their mechanisms. The metal one has an interesting history too and thinking of it next time you stand to a security checkpoint will give you something to contemplate on.