Novel packaging structure for fiber optic hydrophone probe and fiber optic hydrophone array

Abstract

A novel packaging structure for a fiber optic hydrophone probe and a fiber optic hydrophone array comprise an outer shell, polyurea composite material, an armored cable, a pressure plate connector, a transition connecting sleeve, a Kevlar rope, an acoustic sensor and the like. The outer shell is packaged under pressure through the acoustic sensor with pressure resistance and sound transmission of the probe considered; the polyurea composite material is watertight packaging material with excellent hydrophobic and sound transmission properties; the armored cable is used for connecting and packaging when a plurality of probes form an array and fibers among the probes are protected with good watertight and mechanical properties. Both ends of the acoustic sensor are connected with the armored cable through the pressure plate connector; an external sleeve of the pressure plate connector is sealed through a transition connected sleeve; a plurality of fixing holes are formed on the connected sleeve to fix the Kevlar rope and improve tensile strength of an arraying probe cable. Compared with the prior art, the packaging structure has high structural reliability, good water tightness and strong deepwater pressure capacity. Furthermore, engineering and mass assembly are easy to realize.

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 fib

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