In life, situations often arise when it is required to detect objects made of conductive materials in a dielectric medium. The state of the element base produced by the industry is such that it is possible to create devices of small 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 the special literature.
This device allows you to detect metal in media such as water, soil, stone, wood and living tissue. Metal detectors are used in customs and military affairs, as well as in archeology and when searching for treasures and caches. 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 operation.
Types of metal detectors
In practice, different methods of detecting metals are used and, accordingly, they differ in the principle of operation. Main types of appliances:
1. The transceiver system consists of two isolatedcoils, one of which emits and the other perceives the reflected signal.
2. The induction circuit has only one coil, which is both an emitter and a receiver. The reflected signal is determined in a selective way.
3. Frequency systems are based on a change in the reference signal when the contour is brought to the desired.
4. A pulsed metal detector excites eddy currents in hidden metals, determines the electromagnetic field resulting from such exposure.
In order to make a metal detector with your own hands, its circuit should be quite simple. To implement the plan, materials, tools and skills in assembling electronic circuits will be required.
Make your own device
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. Predominantly for this, a polymer pipe for water supply of the appropriate diameter is used. The coil must be reliably shielded from the effects of an external electromagnetic field.
How to make a do-it-yourself metal detector reliable and efficient? You need to choose a search generator. The devices use different schemes, but experts recognize the most effective 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 ornon-magnetic nature.
Determine how to make a metal detector with your own hands, special literature on radio engineering will help. In the process of assembling electronic circuits, you will need the skill of working with a soldering iron. The generator is enclosed in a waterproof housing made of dielectric materials, which will allow it to be used for outdoor operation. Practice shows that the use of metal detectors significantly increases the effectiveness of search work.
