System and method for detecting target back trace in water based on laser pulse back scattering

Abstract

The invention discloses a system and a method for detecting a target back trace in water based on laser pulse back scattering. The detection system comprises a laser pulse transmitting device, a back scattering signal detection device and a signal processing device. The method comprises the following steps that: the detection system is placed in the water; the laser pulse transmitting device transmits linear polarization laser pulses into the water; the back scattering signal detection device detects back scattering signals of the laser pulses; and the signal processing device processes the output signals of the back scattering signal detection device in real time and detects the target back trace. The detection process comprises the following steps of: 1, measuring the back scattering signals of the laser pulses through repeated experiments, and determining a judgment standard of the target back trace; and 2, measuring the back scattering signals of the laser pulses in an actual water area and comparing with the judgment standard to judge whether the target back trace exists or not. The system and the method have the advantages of high practicality, high reliability, long detection distance and high anti-jamming capability and can be used for detecting dynamic targets in the water in real time.

Description

technical field [0001] The invention belongs to the application field of laser technology, and relates to the detection of dynamic target trails, in particular to a backscatter detection system and method for underwater target trails, which can be used for surface ship tracking, underwater dynamic target detection, underwater weapon self-guidance and Design of underwater vehicles. Background technique [0002] With the development of marine resources and the increasing awareness of coastal defense in various countries, the detection and tracking of dynamic targets in seawater has become an important research topic. In addition to traditional acoustic detection methods, underwater detection methods also include infrared detection methods, electromagnetic detection methods and optical detection methods. [0003] Acoustic detection is divided into active acoustic detection and passive acoustic detection according to whether the detection device emits acoustic signals, and is d...

AI Technical Summary

Problems solved by technology

When the forward scattering detection method is used for detection, the laser source and detector are located on both sides of the wake of the target to be detected. The existing laser scattering characteristic detection and laser scattering spatial spectrum detection technologies belong to this method. Although these methods are easy to implement , but the detection device must travel in the target wake, so for practical applications such as surface ship tracking, underwater dynamic target detection, underwater weapon self-guidance and underwater vehicles, this method is less practical

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