Pressure sensing method based on photonic crystal fibers and sensor

A technology of photonic crystal fiber and pressure sensor, which is applied in the field of optical sensing methods and sensors, can solve the problems of no photonic crystal fiber pressure sensing method and technology, and achieve the effect of good design and production and low cost

Active Publication Date: 2012-06-13
BEIHANG UNIV
View PDF3 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the photonic crystal fiber is a new type of fiber, there are few studies and reports on its use in pressure measurement, and there is no method and technology for pressure sensing using the characteristics of the mode field change of the photonic crystal fiber when it is pressed.

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
  • Pressure sensing method based on photonic crystal fibers and sensor
  • Pressure sensing method based on photonic crystal fibers and sensor
  • Pressure sensing method based on photonic crystal fibers and sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] The present invention provides a method for accurately sensing pressure based on a photonic crystal fiber. When pressure acts on a traditional fiber and a photonic crystal fiber, the size of the photonic crystal fiber and the shape of the transmission mode field will change accordingly. However, the traditional mode field does not change, so the transmission loss will change with the applied pressure at the fusion point of the photonic crystal fiber and the ordinary conductive fiber. Using this characteristic, the present invention designs a simple reflection and transmission optical path. When the power of the light source is constant, the pressure can be measured by measuring the output change of the optical path.

[0032] The sensing measurement of the present invention can have two different structures, which are reflection type and transmission type respectively, and the specific implementation is as follows:

[0033] (1) Reflective type

[0034] like Figure 5 A...

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

Disclosed are a pressure sensing method based on photonic crystal fibers and a sensor. Light emitted from a light source is coupled to a pressure sensing head through general conducting fibers, wherein the pressure sensing head is manufactured by the photonic crystal fibers. When pressure acts on the pressure sensing head, size and pitch of air holes of the photonic crystal fibers and pressure thereof are varied linearly, the light source transmission light mold field is varied, welding point coupling loss is then varied, and variation of light strength can be detected by a detector, so that pressure measurement is realized. The sensor is simple in structure, small in size, compatible biologically, independent with temperature and insensitive to electromagnetism and radiation, and the like.

Description

technical field [0001] The present invention relates to an optical sensing method and sensor, more particularly, to an optical fiber sensing method and sensor capable of measuring pressure based on a photonic crystal fiber. Background technique [0002] Optical fiber pressure sensor is widely used because of its low cost, light weight, and not affected by electromagnetic radiation, and it has become the main research direction in this field at the same time. For example, in the medical field, with the promotion of micro-invasive therapy and the extremely narrow space to be detected, miniaturization becomes important. Moreover, the optical fiber has good biocompatibility, which makes the optical fiber sensor have great potential in the production of devices in the fields of bioengineering, medical diagnosis and treatment because of its biological adaptability, small size, low cost, electrical insulation, and electromagnetic interference. attraction. [0003] However, the cu...

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 Applications(China)
IPC IPC(8): G01L1/24
Inventor 杨远洪段玮倩张星杨明伟叶淼
Owner BEIHANG 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