Metal Detectors Working Principle
Metal detectors, one of the devices that work with radio frequency, have advanced features used in treasure hunting. Metal detectors send signals from the coils on their working principle, allowing the elements belonging to the metal group underground to be found. Detectors that also work in large areas and areas where there is water have been invented.
What are the uses of metal detectors?
The working principle of metal detectors that distinguish metals as VLF type is to detect the location of underground materials by means of signals given by coils over radio frequencies. The signals reflected by the sending and receiving bombs hit the metal materials under the ground and return to the detector. Thanks to this return, the receiving and transmitting bombs create vibrations and provide the formation of the pulse frequency. Detectors used in treasure hunting are designed to find minerals that are especially included in the metal group and can be used in mineralized soils in terms of depth and measurement range. It detects the location of minerals under the ground by creating Faraday and eddy currents over magnetic waves and electromagnetic waves.
How Does a Metal Detector Work ?
The metal detector, which works with radio frequencies, first sends vibrations underground with electromagnetic waves emitted from the coils, receiver and transmitter sections. These vibrations bounce back from the metal mine they hit, creating Faraday or eddy currents, so the magnetic wave passes into a different wave production and gives a signal to the receiver. This system increases the signal probability according to the power of the detector, and is designed separately to work with the same performance in wet lands or in water.
Depending on the type and size of the metal, the signal given by the detector will increase, and some minerals and soil conductivity may decrease the metallic properties. For this reason , the operating principle and features of the metal detector should be carefully considered within the scope of the receiver and transmitter features.
What are the Types of Detectors?
Detectors with low frequency sensors are called VLF. There are also pulse frequency detectors and dual coil receiver and transmitter detectors. VLS type detectors can be a professional workmate in metal discrimination. For sensitive detectors, detector features with single coil and depth measurement range can be preferred. The presence of many elements and the variability of frequency and measurement range also provide information about the detector's power in finding metals and other minerals.
Metal VLF Detector Features
VLF type detectors determine the location of the metal by changing the phase of the received signals. Thanks to this working principle, it ensures that the metal is separated from other substances and that there are no false directions. Especially in large areas, the misleading of pipelines and similar installation systems can be both a waste of time and dangerous during the excavation process. The signals reflected from the receiver coil with fixed magnetic field transmissions also determine the phase number of the metal and have a system for accurate detection.