Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Interference-type optical fiber hydrophone optical path system and acoustic signal detection method thereof

A fiber-optic hydrophone, sound wave signal technology, applied in the direction of measuring ultrasonic/sonic/infrasonic waves, instruments, measuring devices, etc., can solve redundant noise, it is difficult to achieve sound insulation, vibration isolation and heat insulation of the reference end of the fiber optic hydrophone, structure complication etc.

Inactive Publication Date: 2019-01-11
BEIJING INST OF AEROSPACE CONTROL DEVICES
View PDF8 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned optical path system including the reference end of the fiber optic hydrophone has certain limitations: it is difficult to realize the sound insulation, vibration isolation and heat insulation of the reference end of the fiber optic hydrophone; the reference end of the fiber optic hydrophone increases the complexity of the optical path system, and it is easy to introduce redundant noise ; The reference terminal of the optical fiber hydrophone increases the power consumption of the matched signal demodulation system and complicates the structure

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Interference-type optical fiber hydrophone optical path system and acoustic signal detection method thereof
  • Interference-type optical fiber hydrophone optical path system and acoustic signal detection method thereof
  • Interference-type optical fiber hydrophone optical path system and acoustic signal detection method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0056] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be more thoroughly understood, and will fully convey the scope of the present disclosure to those skilled in the art. It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0057] figure 1 It shows the optical path system diagram of the interferometric fiber optic hydrophone provided by t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an interference-type optical fiber hydrophone optical path system and an acoustic signal detection method thereof. The interference-type optical fiber hydrophone optical path system comprises a light source modulation system, a circulator, an optical fiber hydrophone probe, a photoelectric detector, an analog-to-digital converter and a signal demodulation processor. A pulselight sequence output by the light source modulation system enters the optical fiber hydrophone probe through the circulator and divided into two ways in the optical fiber hydrophone probe, one way is used for sensing an external acoustic signal and is delayed, and the delayed light sequence interferes with the other way of light sequence to form a beat frequency optical signal; the photoelectricdetector converts the beat frequency optical signal into an analog beat frequency electrical signal, and the analog beat frequency electrical signal is converted into a digital beat frequency electrical signal through the analog-to-digital converter; and the signal demodulation processor stores the digital beat frequency electrical signal when the external acoustic signal does not exist, according to the stored digital beat frequency electrical signal when the external acoustic signal does not exist, a received digital beat frequency electrical signal when the external acoustic signal existsis subjected to signal demodulation processing, and the external acoustic signal is obtained.

Description

technical field [0001] The invention relates to a novel interference optical fiber hydrophone optical path system, which belongs to the field of optical fiber hydrophones. Background technique [0002] Optical fiber hydrophone is a new type of sensor based on optical fiber and optoelectronic technology. Its principle is to use sound waves to modulate the intensity, polarization, phase and other parameters of light waves to obtain information such as frequency and intensity of sound waves. Optical fiber hydrophones have high sensitivity, wide bandwidth, good frequency response characteristics, hydrostatic pressure resistance, "wet end" full light, high stability, lighter and smaller optical cables, high temperature resistance, corrosion resistance, long transmission distance, With the advantages of being reusable on a large scale, it has gradually replaced traditional piezoelectric hydrophones and has been applied in military, commercial, scientific research and other fields....

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01H9/00
CPCG01H9/004
Inventor 郝良彬郑百超张海岩李振王学锋
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com