A new fiber optic hydrophone probe package structure and fiber optic hydrophone array

Abstract

A new packaging structure of fiber optic hydrophone probe and fiber optic hydrophone array, including shell, polyurea composite material, armored optical cable, pressure plate joint, transition connection sleeve, Kevlar rope, acoustic sensor, etc. The shell is the pressure-resistant package of the acoustic sensor, which takes into account the pressure resistance and sound permeability of the probe. Polyurea composite material is a watertight packaging material with excellent water repellency and sound permeability. When multi-probes are in an array, the connection package adopts armored optical cables to protect the optical fibers between the probes, and has good watertight and mechanical properties. The two ends of the acoustic sensor are connected to the armored optical cable through the pressure plate joint, and the outer part of the pressure plate joint is covered with a transition sleeve for sealing. There are a number of fixing holes on the connection sleeve, which are used to fix the Kevlar rope and improve the tensile strength of the array detection cable. strength. Compared with the prior art, the invention has high structural reliability, good water tightness, strong deep water pressure resistance, and easy engineering and mass assembly.

Description

technical field [0001] The invention belongs to the field of optical fiber sensing, and relates to a novel optical fiber hydrophone probe package structure and an optical fiber hydrophone array. Background technique [0002] Sound waves remain by far the most efficient vehicle for transmitting information over long distances in water. Optical fiber hydrophone is a new type of underwater acoustic signal sensor developed based on optical fiber and optoelectronic technology. It has important applications in military and civilian fields. In the military field, it is the core component of anti-submarine sonar; in the civilian field, it can be used for seismic wave detection, oil seismic exploration, fish detection, etc. Compared with traditional piezoelectric hydrophones, it has the advantages of high sound pressure sensitivity, wide frequency range, anti-electromagnetic interference, resistance to harsh environments, light structure, underwater passive, easy telemetry, and easy...

AI Technical Summary

Problems solved by technology

[0007] The PU rubber tube is soft, and it is easy to be scratched by sharp structural parts during the laying process, or destroyed by organisms underwater; for the convenience of installation, the outer diameter of the acoustic sensor is smaller than the inner diameter of the PU rubber tube, causing the acoustic sensor to float in the rubber tube. Unable to make a reliable connection with the packaging structure; light wax oil is a fluid with a large thermal expansion coefficient, and the fiber detection cable often "bulges" during storage; the Kevlar rope can only bear the pulling force, and the optical fiber between the acoustic sensors is not reliable protection, the packaging process is easily damaged; PU rubber tubes and light wax oil are not strong enough to resist deep water pressure, and the detection sensitivity will decrease rapidly with the increase of the laying depth; The outer layer of PU rubber tube, the operation process is complicated and takes up a lot of space;

Images