Optical fiber micro-displacement air pressure detecting device

An air pressure measurement device and micro-displacement technology, which is applied to measurement devices, optical devices, fluid pressure measurement using optical methods, etc., can solve the problems of increasing the cost and achieve the effects of convenient processing, simple operation, and saving manpower and material resources

Inactive Publication Date: 2013-12-18
NANJING UNIV OF SCI & TECH
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If an autocollimator with a larger diameter

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
  • Optical fiber micro-displacement air pressure detecting device
  • Optical fiber micro-displacement air pressure detecting device
  • Optical fiber micro-displacement air pressure detecting device

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example

[0036] according to figure 1 Of the structure diagram for preliminary experimental verification device construction, such as Image 6 Shown. The light emitted by 1550nm (±3nm, power is 2-5mw) narrowband light source 1 enters the optical fiber micro-displacement sensor after passing through the 2×2 coupling device 6. This part of the light passes through two lens-type self-aligning optical fiber micro-displacement sensors. The exit end face of the straightener 7 is emitted, a part is reflected back into the original optical fiber via a reference corner cone diaphragm 8 and becomes the reference light, and the other part is reflected back into the original optical fiber via the corner cone diaphragm 9 to be measured, which is the test Light; these two beams produce optical path difference due to the difference in arm length, and interfere in the fiber coupler 6. After the interference signal passes through a 3×3 coupler 3, two of the two beams with fixed phase diff...

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 optical fiber micro-displacement sensing device which detects gas pipeline air pressure. According to the device, two lens-type optical fiber auto-collimation devices and two pyramid film (one is a reference film, and the other is a film to be detected) are used for obtaining two coherent light beams which interfere in a 2*2 optical fiber coupler, three light beams with the phase difference being 2pai/3 are obtained through a 3*3 coupler, and through a corresponding counting circuit and a phase judging circuit, pipeline pressure can be detected by processing the displacement of the film to be detected in real time. The optical fiber micro-displacement sensing device is scientific in design principle and clear in structure, parts are convenient to machine, and the device is mainly used for detecting pressure in a gas conveying pipeline. Transient state air pressure of the pipeline can be accurately detected, a real-time accurate data system is established for real-time changing of pipeline air pressure, and significance is achieved in automatic monitoring and managing of the pipeline.

Description

technical field [0001] The invention belongs to the field of optical precision measurement, in particular to a micro-displacement air pressure measurement device based on an optical fiber lens type autocollimator and a pyramid reflective membrane. Background technique [0002] With the improvement of people's living standards, gas energy such as natural gas has gradually become the mainstream energy demanded by people, and the uneven distribution of gas energy requires a complete gas pipeline system to realize its transportation. The real-time monitoring of the gas pipeline pressure can keep abreast of the gas transportation situation, and timely investigation of problems can be done, avoiding some adverse effects such as gas leakage. However, up to now, the vast majority of pipeline air pressure measurements have been made by mechanical barometers, which can only be measured manually without automatic measurement, resulting in low precision and low efficiency. The real-tim...

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): G01L11/02G01B11/02
Inventor 李建欣何勇秦北志黄慧马力崔艳军
Owner NANJING UNIV OF SCI & TECH
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