In life, situations often arise when the detection of objects from conductive materials in a dielectric medium is required. The state of the manufactured elemental base industry is such that it is possible to create devices of low weight and dimensions. The answer to the question of how to make a metal detector with your own hands, and whether it is possible at home, is contained in special literature.
This device allows you to detect metal in environments such as water, soil, stone, wood and living tissue. Metal detectors are used in customs and military affairs, as well as in archeology and in the search for treasures and hiding places. To get an accurate answer to the question of how to make a metal detector with your own hands, you need to understand the physical principles underlying its work.
Types of metal detectors
In practice, different methods for detecting metals are used and, accordingly, they differ in principle of action. The main types of devices:
1. The transceiver system consists of two isolated coils, one of which emits, and the other receives the reflected signal.
2. The induction circuit has only one coil, which is both the emitter and the receiver. The reflected signal is determined in a selective way.
3. Frequency systems are based on a change in the reference signal when the circuit is brought to the desired one.
4. A pulsed metal detector excites eddy currents in hidden metals , determines the electromagnetic field resulting from such an effect.
In order to make a metal detector with your own hands, its circuit should be quite simple. To implement the plan will require materials, tools and assembly skills of electronic circuits.
Making the device in-house
A simple do-it- yourself metal detector is assembled from affordable and inexpensive radio components. The sensor (or search coil) is mounted on a long rod of dielectric material. Mostly for this, a polymer pipe is used for the water supply of the corresponding diameter. The coil must be reliably shielded from the effects of an external electromagnetic field.
How to make a metal detector reliable and efficient with your own hands? It is necessary to choose a search generator. The devices use different schemes, however, the most effective experts recognize a system with a controller, the operating frequency of which is automatically adjusted. Such a device allows you to accurately determine not only the presence of metals, but also their magnetic or non-magnetic nature.
Decide how to make a metal detector with your own hands, special literature on radio technology will help. In the process of assembling electronic circuits, you will need the skill of working with a soldering iron. The generator is a waterproof housing made of dielectric materials, which will allow it to be used for outdoor use. Practice shows that the use of metal detectors significantly increases the effectiveness of search work.