How Does a Detector Circuit Work?

Detector circuits are divided into several categories according to their operating principles.

The most useful and most preferred detector circuit models are pulinduction detector systems. This device is more sensitive compared to other devices and can reach deeper points underground.

Pulse induction metal detectors have a higher power consumption rate than other devices. Old-style pulse devices did not have a metal separation feature. Thanks to today's modern technological possibilities, metal separation has become very good. With graphic liquid crystal display (GLCD), or TFT full color screens, it has become an easy, rich and useful device for the user.

Detectors are listed according to various features such as the purpose of use, the area to be used and the material sought.

Some of these are as follows;

They are detectors with superior technology that allow scanning a very wide area from a single point. They are also known internationally as Long-Range-Locator (LRL).

The field search detector is used to detect valuable mines, large underground caves, cavities, rocks and water sources.

Metal detectors are used in electromagnetic fields to detect the presence of metal objects. There are portable handheld metal detectors as well as vehicle mounted types. The area of use of metal detectors is quite wide.

It is used in places where security measures must be taken, such as airports, shopping malls, and courthouses.

Gold detectors are special metal detectors designed for treasure hunting. They are widely used in military minesweeping as well as archaeological excavations and treasure hunting.

We have said that gold detectors are specialized metal detectors. Since there are no detectors on the market that are fully suitable for searching for gold and detecting gold, metal detectors are used for help.

These devices, which are generally preferred over x-ray devices, are also used manually by security personnel. They are used to detect people with possible criminal weapons in order to prevent security vulnerabilities in crowded places such as airports, concert venues, and rally areas.

Detector circuits are devices that work with radio waves. The coils on them act as receivers and transmitters. When the electromagnetic waves produced in the transmitter area encounter a metal, a current appears from the metal object. (Faraday currents - eddy currents) The reception formed on the metal produces a magnetic wave, which creates a current on the receiver coil on the detector. The resulting current signal is strengthened by an amplifier and turns into an audio signal and gives a visual notification. Detectors can search up to 12 meters depending on their power and quality.

Detector sensors may seem simple, but they are also technically and practically complex. The sensors inside are very small and sensitive, and can fail at the slightest problem. The coil windings are also very sensitive and important. The sensors create analog data and send this data to the main board. The main board converts this data into digital data and creates values that you can understand.

Metal detectors operate on the general principle of sending and receiving electromagnetic waves. Detectors' electronic circuit: The electromagnetic wave that is sent induces a current called "eddy currents" or "faraday currents" on the metal object it encounters. This induced current affects the coil in the detector and causes some small signal changes. These small signals are amplified in electronic circuits and sent to the speaker to create a sound signal. Some detectors also have needle or digital signal measuring circuits.

Detector manufacturing is an area of interest for electronics. Since the circuit is a complex device, it is difficult to manufacture a detector at home. Even those who manufacture world-famous detector brands have worked with scientists to produce detectors as projects and put them on the market. Even making a simple detector is both time-consuming and quite difficult.