Extrinsic fiber-optic F-P vibration sensor and system

A vibration sensor and extrinsic technology, which is applied in the field of extrinsic fiber-optic perovskite vibration sensors and systems, can solve the problems of difficult adjustment of the length of the Fizeau cavity, complicated processing methods, and inability to guarantee the verticality of the gradient lens, etc. Difficulty in processing and debugging, overall compact effect

Active Publication Date: 2016-01-20
CHONGQING UNIV
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The processing method of this patent is complicated. In practical applications, the verticality of the gradient lens cannot be guaranteed, and the length of the Fizeau cavity is difficult to adjust.

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
  • Extrinsic fiber-optic F-P vibration sensor and system
  • Extrinsic fiber-optic F-P vibration sensor and system
  • Extrinsic fiber-optic F-P vibration sensor and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Please refer to figure 1 , is a structural schematic diagram of an embodiment of the extrinsic fiber optic F-P vibration sensing system provided by the present invention. The system is mainly composed of an extrinsic fiber optic F-P sensor 30 and a phase carrier demodulator 29 .

[0023] Wherein, the structural details of the extrinsic fiber optic F-P sensor 30 are as follows: figure 2 shown. It includes: a shell with an opening, a vibration sensitive element, a reflector 15, a collimating lens 4 with a pigtail 1, a collimating lens clamping device 2, 13, a spring fixing device 5, a spring 3 and an end cover 11.

[0024] Wherein, the shell with opening is mainly composed of a base 10 and a shell 18 , the shell 18 is arranged on the base 10 and screwed with the base 10 , and the opening is set on the shell 18 . And a mounting hole 19 is provided at the bottom of the base 10 for mounting the base 10 on the object to be measured.

[0025] Wherein, the vibration sensit...

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 provides an extrinsic optical fiber Fabry-Perot vibration sensor and a system. The system comprises a phase carrier demodulator and the extrinsic optical fiber Fabry-Perot vibration sensor, wherein the extrinsic optical fiber Fabry-Perot vibration sensor comprises a casing with an opening, a vibration sensitive element, a reflecting mirror, a collimating lens with a tail fiber, collimating lens clamping devices, a spring fixing device, springs and an end cover; after the reflecting mirror is arranged in the middle of the vibration sensitive element, the vibration sensitive element is connected inside the casing; after the collimating lens are clamped with the collimating lens clamping devices, the spring fixing device is placed in and mounted on the casing, and the springs are supported between the casing and the spring fixing device; the spring fixing device is locked on the casing with fastening bolts; the end cover is arranged at the opening of the casing and is in threaded connection with the casing; and the light emergence surface of the collimating lens and the reflecting mirror are parallel and form a Fabry-Perot cavity. According to the extrinsic optical fiber Fabry-Perot vibration sensor and the system, the length of the Fabry-Perot cavity and the parallel degree between the light emergence surface of the collimating lens and the reflecting mirror are extremely easy to adjust.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensing, in particular to an extrinsic optical fiber F-P vibration sensor and a system. Background technique [0002] In earthquake monitoring, structural health monitoring, and mechanical vibration measurement in complex environments, fiber optic vibration sensing is widely used due to its high sensitivity, large dynamic range, anti-electromagnetic interference, and easy reuse. At present, optical fiber vibration sensing mainly includes light intensity modulation, wavelength modulation and phase modulation. Among them, phase modulation optical fiber vibration sensing has been widely researched and applied due to its high performance and low cost. Phase-modulated optical fiber vibration sensing generally uses interferometers to convert inertial forces into phase changes of interference signals to achieve acceleration or displacement sensing. Commonly used interferometers include Michelson in...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01H9/00
Inventor 王代华贾平岗
Owner CHONGQING UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap