What is a metal detector able to find?
Regarding what the metal detector can detect, I think this is not only a point of concern for passers-by, but also a point that many friends-seeking players want to know. I have seen many sellers advertise that they can detect copper coins and silver dollars. I personally think that as long as it is a metal detector, it is basic to be able to detect these. After all, they are collectively called metal. In fact, any kind of metal substance, including mineralized soil, can make the metal detector sound. This is because the metal detector uses the principle of electromagnetic induction and uses a coil with alternating current to generate a rapidly changing magnetic field. This magnetic field can induce eddy current inside the metal object, and the eddy current will generate a magnetic field, which in turn affects the original magnetic field and causes the detector to emit sound. Therefore, as long as it is metal, it can be detected whether it is coins, copper objects, iron objects, gold products, or silver products.
So, since these metals can all be detected, how do friends-seeking players distinguish these metals? I believe everyone also wants to know. Existing metal detectors can distinguish metals into two categories, ferrous metals and non-ferrous metals. Ferrous metals are iron, and non-ferrous metals include gold, silver, copper, aluminum, etc.
Everyone knows that metal detectorists don’t want to dig out iron, and it happens that metal detectors can remove iron through settings. Xingbaolai will not make a sound, which greatly reduces useless digging.
Let’s talk about the distinction between non-ferrous metals. Everyone should know that different metals have different conductance and resistance values, so the electromagnetic induction and magnetic field changes they cause will be different. Naturally, the sounds emitted by the detector will also be different. Of course There is a more professional statement about this explanation, and if you are interested, you can check it yourself. Having said that, in addition to using different sounds to identify non-ferrous metals, and the current metal detectors have display screens, different metals will also have different numerical values, so that the metal that the target may be in can be identified. The type range informs the visiting player. Although non-ferrous metal objects can be distinguished by listening to the sound and looking at the value, most of the friend hunters cannot 100% tell what kind of metal they are detecting when they are outdoors, because many metal objects are not a single metal element, plus It has been buried in the ground for a long time, unknown changes have occurred, and the interference of the mineralization of the surrounding environment, etc., will affect the accuracy of the metal detector, and it can only be used as a reference for the approximate value of the metal, so what is it? We have to dig it out to find out.
Finally, the area, shape, and weight of metal objects have a great relationship with the detection results of metal detectors. Generally speaking, the larger the area, the greater the number, and the greater the corresponding detection depth; The smaller the number, the smaller the corresponding depth. For example, a pile of copper coins, a pile of silver dollars, such a large pile of metal accumulation, in the "eyes" of metal detectors, is a bright light in the dark night, which cannot be hidden. The signal was captured in minutes.
