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Metal detector
Metal detector is an electronic equipment capable of detecting metal objects which transmit electromagnetic field or through a series of electromagnetic pulses the coil (which acts as an antenna and reception signal). Used in security, search, or find and buried metallic objects, either by archaeologists or enthusiasts is a metal detector.
If you want to run the metal detector?
The simplest detectors can consist of oscillator that produces AC (alternating current, which can be a sine) signal, passes through the coil to detect these signals and produces a magnetic field rotation. One of the more famous laws of physics to explain the current mountain becomes in some conductive materials, the presence of a magnetic field, and vice versa, and this explains why more troubled detectors in areas highly mineralized or with a lot of garbage.
Best power metal is lead, and in the specific case of metal detectors, when there is a metal is located in a region that produces a magnetic field powerful enough, and it pitting parasitic eddy currents metal part (tornado current known also known as eddy currents), and these currents in turn produce another magnetic field coil detector measures the variation in the magnetic field.
Thousands and thousands of people from all over the world are using metal detectors to search for ancient relics, military objects, coins, etc. Some people to become rich and others to have a good time, beaches, mountains, anywhere where there is a suspicion that you find something. In archaeological areas or that they should be viewed as the heritage, laws in this matter: for all you must have a permit and without the permission of that user is interpreted for detecting a crime against property. Despite these regulations, are some archaeological sites illegally each year looters carrying detectors.
There are six main types of activities involving fans using some metal detector:
Search currency: the goal is to find the ancient or modern coins of gold or silver, and there is also a type of specialized metal detectors in search of coins (e.g. FX 3000 electronics DRS), others have a small search coil coins (such as Earth Exper DRS). Some do it after some events (like any sporting event) on the right, the historical research in a particular area you get better results.
Metal detecting in general very similar to search for coins not to seek any type of metallic object of some interest. Some are dedicated to preserving historical artifacts. Coins, bullets and buttons and Fez buckles are just some of the objects that are usually found in the search engines (hunters) of the relics. In this aspect the depth detection, concerned enough to detect PI especially good in that regard (DRS Earth Exper can reach 10 meters depth, thanks to the planned from 1 m x 1 m, and the same can be said about pioneer 4500). As there are many who are interested in the distinction which has to disclose.
Prospecting, those who do this are looking for precious metals like gold and silver with natural forms.
Detection on the beaches, mainly aimed at searching for coins and jewels on the beach. This discovery can be as simple or complex as you want. Analyzes the tidal movements, and also there are others that comb the terrain in a specific style (roast) and others who do not follow any pattern, but the comb the ground randomly hoping to cover more terrain will make more findings.
Discrimination
Many researchers (especially those that started with this hobby) looking for metal detectors that have better discrimination, i.e., the ability to identify the type of metal being detected (either metal, silver, gold, paintings, nails, rusty, iron objects, etc). What you are looking for is to find out if the detected object are worthwhile or not, because there are so many area scrap, iron objects, and other non-valuable minerals, this important feature is a metal detector
Many metal detector distinguish the level of conductivity of the metal object, where digital indicators for example from 1 to 99, with 1 very low level of conductivity and a very high level of conductivity, where silver is detected with very high numerical value, but since there are many objects (different types of alloys) that have the same electrical conductivity makes this kind of discrimination is not completely reliable, and in those cases the user experience plays an important role Too.
On the other hand, there is also a type of metal that one to detect the magnetic sensor characteristic (such as pioneer 4500), and not this type of discrimination is based on the conductivity and magnetic properties of objects, however. It must be noted that iron and nickel and some other metals of magnetism (which can be used in electromagnets and transformers) that cannot be detected easily even when the object this very rusted or buried for a long time, since non-ferrous objects (gold, silver, copper, etc) have a slightly magnetic.
Other forms of use
Not considered portable metal detectors (personal safety and mine action), consisting of arches or disclose spending, known as the “metal heads”. These tend to be used in food, chemical, pharmaceutical, mining, timber, recycling operations.
These tunnels which generate electromagnetic field inside, can be square, rectangular or circular. Circular tunnels used to inspect the products pass through the pipes and containers are used in the tapes.
At the beginning of the Decade, technology has improved because of this difference in high demand, by electronic analog of the first generation of the new digital technology, which provides excellent results in magnetic detection as non-ferrous and ferrous and non-magnetic.
In industrial environment with amazing fast production more than ever, the metal detector using this type of equipment, capable of processing digital signals for high speed scanning, a technological breakthrough for the preventive security and quality control.
The first military uses to detect the presence of landmines, anti-personnel landmines or other explosive mineral mines. They work in the field of security in airports or places subject to special control. Also used in civilian industry, to detect the electrical cables, water pipes etc.
On the issue of discrimination should be highlighted, which was recently launched in the market DRS GROUND EXPER detector, which features incredible discrimination capability, as well as being extremely stable and easy to use.
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