Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

High-sensitivity dynamometer based on Fabry-Perot principle and force measurement method

A high-sensitivity, dynamometer technology, applied in the measurement of force, force measurement by measuring the change of optical properties of a material when it is stressed, force/torque/work meter calibration/testing, etc., can solve the problem of low measurement accuracy. And other issues

Pending Publication Date: 2020-03-31
STATE GRID CORP OF CHINA +2
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For this reason, the present invention will solve the technical problem of low measurement accuracy in the prior art, thereby providing a short-length and high-precision dynamometer and force measurement method based on the Fabry-Perot principle

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
  • High-sensitivity dynamometer based on Fabry-Perot principle and force measurement method
  • High-sensitivity dynamometer based on Fabry-Perot principle and force measurement method
  • High-sensitivity dynamometer based on Fabry-Perot principle and force measurement method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The invention provides a high-sensitivity dynamometer based on the Fabry-Perot principle, the scheme is as follows figure 1 , figure 2 Shown:

[0031] It includes optical fiber (1), optical fiber protective sleeve (2), elastic sheet (3), elastic sheet clamp (4), force deformation body (5), force rod (6) and FBG optical fiber temperature sensor.

[0032] The distance between the top and bottom center points of the stressed deformable body (5) will change when it is subjected to an external force, that is, the two elastic sheet clamps can move in the axial direction ( figure 2 The relative movement occurs in the upper and lower directions), thereby pushing the elastic sheet (3) to compress in the axial direction, so that the deflection of the middle point of the elastic wave plate changes, and thus the length of the interference cavity of the EFPI changes. The two elastic sheet clamps (4) are respectively connected to the center points of the top and the bottom of the...

Embodiment 2

[0046] The present embodiment provides a method for measuring the force of a high-sensitivity dynamometer based on the Fabry-Perot principle,

[0047] Include the following steps:

[0048] When tension or pressure is applied to the stressed rod (6), the stressed deformable body (3) deforms, causing the distance between the top and bottom center points of the stressed deformed body (5) to change, thus driving the upper and lower elastic The distance between the sheet clamps (4) changes, that is, the elastic sheet (3) will be stretched or compressed, so that the deflection of the midpoint of the elastic sheet 13 will change, that is, the length of the interference cavity will change. By measuring the interference cavity The degree of change in length and the stiffness of the stressed deformable body (5) reflect the size of the external force.

[0049] The deflection in the middle of the elastic sheet is measured by the EFPI fiber optic sensor, and the temperature is measured by...

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 relates to the field of tight measurement equipment, in particular to a high-sensitivity dynamometer based on a Fabry-Perot principle and a force measurement method. The dynamometer comprises an optical fiber, a light protection sleeve, an elastic sheet, an elastic sheet clamp, a stress deformation body, a stress rod and an FBG optical fiber temperature sensor. According to the basicprinciple, the relation between the compression amount and the deflection of the middle position is used for amplifying the axial displacement change amount under the working condition that the sheetis unstable, and therefore high-precision monitoring is achieved. Through the principle of the pressing rod, very small axial displacement of the elastic sheet can be changed into very large midpointnormal displacement, and under normal conditions, the magnification times can reach more than 6 times, so that the measurement precision can be improved. Meanwhile, through the structural design, theworking temperature of the measuring device can range from 0 DEG C to 80 DEG C, and the tensile force or pressure of the structure under the action of static force and power can be measured. Moreover, the dynamometer is not interfered by any electromagnetic signal, and the influence of temperature on force can be corrected through temperature compensation.

Description

technical field [0001] The invention relates to the field of compact measuring equipment, in particular to a high-sensitivity dynamometer and a dynamometer method based on the Fabry-Perot principle. Background technique [0002] EFPI sensors are mostly used to measure parameters such as pressure, strain or temperature, but they are all based on the simplest structure and mechanism. Taking a dynamometer as an example, a beam or cylinder is used as a deformable body under compression, and the FBG or EFPI sensor is used to measure the strain of the deformable body under force, and then according to the deformation of the deformable body under force The stiffness determines the magnitude of the force. The disadvantage is that the deformation of the material is small, which will lead to low measurement accuracy; if the deformation is large, the deformed body is prone to fatigue, resulting in a decrease in stiffness and zero drift. The problem of measurement accuracy limits the ...

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): G01L1/24G01L25/00
CPCG01L1/246G01L25/00
Inventor 马信武马龙彪王辉伟赵永志王勇李志洪
Owner STATE GRID CORP OF CHINA
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
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