A high precision vector hydrophone

Abstract

The invention discloses a high-precision vector hydrophone which comprises a first ultrasonic vibrator, a second ultrasonic vibrator, a laser transmitter, a laser detector, a camera and a processor, the first ultrasonic vibrator is connected with the laser transmitter, the second ultrasonic vibrator is connected with the laser detector, the camera and the processor, and the camera is connected with the processor through a data line. When ultrasonic waves emitted by the first ultrasonic vibrator and the second ultrasonic vibrator are transmitted oppositely, a stable standing wave sound field can be formed between the two ultrasonic vibrators, local negative pressure can be formed in the standing wave sound field, acoustic cavitation bubbles grow in water, and when an external sound signal to be detected is transmitted in, the stable standing wave sound field can be disturbed, so that the acoustic cavitation bubbles are slightly deformed. Laser emitted by a laser device enters the laserdetector through the acoustic cavitation bubbles, and the laser detector receives an optical signal penetrating through the acoustic cavitation bubbles, converts the optical signal change into an electric signal and processes the electric signal, so that the change condition of an external sound field is extracted.

Description

technical field [0001] The invention relates to the technical field of underwater acoustic sensing, in particular to a high-precision vector hydrophone. Background technique [0002] Acoustic vector sensing technology is one of the research focuses that has attracted the attention of the underwater acoustic field in the last ten years. From the classic papers published by American scholars in the mid-1950s on the use of inertial sensors to directly measure the particle velocity in water, to the 1970s and 1980s, the former Soviet scholars used their successfully developed acoustic vector sensors (composite hydrophones) device) to carry out research on marine environmental noise, and it was not until the 1990s that the research upsurge of acoustic vector sensor technology gradually emerged. In 1989, Russian scholars published the world's first monograph "Acoustic Vector-Phase Method" on acoustic vector sensor technology, which comprehensively discussed the principle and appli...

AI Technical Summary

Problems solved by technology

However, the sensitivity of existing hydrophones is not high enough, and they cannot achieve long-term and stable work in harsh underwater environments

Images