TWO-CHANNEL INDUCTION-RADIO-WAVE METAL DETECTOR WITH TWO-LEVEL SEARCH ELEMENT Russian patent published in 2025 - IPC G01V3/12 

FIELD: metal detectors.

SUBSTANCE: double-channel induction-radio-wave metal detector comprises a rectangular dielectric frame with induction and radio-wave sensors placed on it, a hinged plug connected to a dielectric elbow of a duralumin rod with a switching cable inside. Device also has a signal processing unit. Dielectric frame is made with a jumper in the middle; induction sensor consists of exciting and receiving inductance coils, made in bulk, with wire PETV-2 with diameter of 0.4 and 0.2 mm, by 20 turns each. On the lower plane of the frame there is a radio wave sensor consisting of an antenna with a microwave generator and two differentially connected receiving antennas. Antennas are printed wiring in the form of ¼ wave dipole antennas. Device comprises a switching board arranged in a slot on the lower rear side of the frame of the search element, and a switching cable. Signal processing unit is made of duralumin. Rear part of the housing of the signal processing unit is equipped with a sealed compartment to accommodate and connect a replaceable power supply unit made in the form of a cassette-container for eight elements of AA batteries.

EFFECT: improved protection against interference of controlled media with simultaneous improvement of portability and ergonomics of structures.

2 cl, 2 dwg