Measurement system and method for detecting orientation and size of underwater target on basis of laser sound source

Abstract

The invention discloses a measurement system and method for detecting the orientation and the size of an underwater target on the basis of a laser sound source. According to the measurement system and method, the sound source is generated through lasers, laser energy is converted into sound wave energy, an acousto-optical coupling interference type optical fiber hydrophone array serves as a receiving sensor, the defects that in the optical measurement process, optical waves which are used are large in attenuation and the measuring distance is short are overcome, the defects of a sonar sensor in traditional acoustics detection are overcome, and the advantages that mobility and flexibility are high are achieved. Meanwhile, a sound source signal is generated through a laser-induced sound system, and generated sound signals have the advantages of being high in sound pressure level, wide in frequency spectrum, capable of conducting non-contact type control, and the like. An acousto-optical coupling interference type optical fiber hydrophone is used as the acoustic signal sensor, and the acoustic signal sensor has the advantages of being capable of detecting underwater acoustic signals in the non-contact mode, high in mobility, small in size, flexible in structural design, and the like.

Description

technical field [0001] The invention belongs to the technical field of underwater detection, and in particular relates to a measurement system and a measurement method for detecting the azimuth and size of an underwater target based on a laser sound source. Background technique [0002] The research of underwater acoustics has a long history. As an important technology of modern underwater acoustic research, underwater acoustic source technology has attracted the attention of underwater acoustic researchers all over the world. In the field of marine detection, underwater sound sources are widely used, such as deep-sea geological detection, offshore oil detection, underwater target detection, etc. At present, underwater sound sources can be roughly divided into the following categories: explosive explosion sound sources, electroacoustic transducer sound sources, parametric array sound sources, fluid dynamic sound sources, electromagnetic sound sources, laser sound sources, et...

AI Technical Summary

Problems solved by technology

In traditional sound wave measurement, sonar sensors are widely used as receiving sensors. However, sonar sensors have the disadvantages of low detection accuracy, high power consumption, and heavy weight. They need to arrange a large space volume and do not use mobile detection.

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