Water-surface/underwater target detection system based on magnetic core coil

Abstract

The invention discloses a water-surface / underwater target detection system based on a magnetic core coil. The system comprises several magnetic core induction coil groups which are laid with an equal interval in an underwater area to be detected. Each magnetic core induction coil group is independently connected to a land signal processing system through a main cable. The signal processing system processes each collected induced voltage signal, determines data information of a target position, a moving speed and a magnetic size, and carries out prompt or early warning according to the data information. Each magnetic core induction coil group comprises several parallel magnetic core coil pairs which are laid with the equal interval. Each magnetic core coil pair comprises 3 (Cxn, Cyn, Czn) long and thin cylindrical magnetic core coils which are vertical to each other and are not connected. The magnetic core coils (Cx1 to Cxn; Cy1 to Cyn; Cz1 to Czn) which are laid at a same direction of all the magnetic core coil pairs are connected in series. The invention also discloses a detection method and an application of the magnetic core coils.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic induction detection, and in particular relates to an electromagnetic induction detection technology using magnetic core coils to detect water surface / underwater moving targets. Background technique [0002] At present, the main means of detecting underwater targets in countries around the world is sonar, but with the improvement of submarine quiet technology and the development of small submarines, sonar detection has become more difficult. Regardless of underwater or surface targets, due to the extensive use of magnetic materials, their magnetism is difficult to eliminate. A magnetic core coil sensor is laid on the bottom of the water. When a magnetic target passes near the sensor, it will disturb the magnetic field distribution, causing the magnetic flux of the magnetic core coil to change abnormally, thereby generating an induced voltage signal on the magnetic core coil, detecting the s...

AI Technical Summary

Problems solved by technology

Sonar detection has its inherent disadvantages: active sonar is often used by the military because it is easy to expose its position to the opponent; passive sonar can only be used when the target emits relatively loud noises. Detect it, determine the location of the sound source, and identify whether it is emitted by the target

Compared with sonar, this technology has the advantages of high positioning accuracy and is not affected by the complex environment of shallow seas. However, the operating distance is short, generally only a few hundred meters, and it is difficult to detect small and weak magnetic targets, and the accuracy of the magnetometer is very high. Unable to long-term, real-time, covert monitoring

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