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

Measuring device and measuring method for element torsion and position parameters

A technology for measuring devices and components, which is applied in the testing of measuring devices, mechanical components, and testing of machine/structural components, etc., can solve the problems of increasing measurement costs, increasing workload, and inability to read data, and achieves light weight. , the effect of small impact and low cost

Inactive Publication Date: 2014-05-21
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can meet the needs of most engineering measurements, it also has many deficiencies: First, the instrument needs to be powered (usually battery-powered). If the battery needs to be replaced during long-term tracking measurement, this will increase the additional workload. It is even impossible to reach the installation location of the instrument to replace the battery; second, it needs to be close to the observation, and some places where the test personnel cannot reach cannot realize the reading of data; third, the instrument needs good protection measures such as rain and sun protection; fourth, the measurement The instrument needs to be purchased additionally, which increases the measurement cost; fifth, because the weight cannot be ignored and is limited by the installation conditions, it is not suitable for the measurement of small components, such as: the torsion measurement of small components in indoor scale model tests

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
  • Measuring device and measuring method for element torsion and position parameters
  • Measuring device and measuring method for element torsion and position parameters
  • Measuring device and measuring method for element torsion and position parameters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] This embodiment is described by taking the measurement of the torsion and position parameters of the main cable of the suspension bridge as an example.

[0021] The measuring device used for component torsion and position parameters provided by the invention is shown in image 3 , including a fixed base 1, and three reflective prism sheets (ie light reflectors) 5, 6, 7 connected to the fixed base through rods 2, 3, 4; The three light reflectors connected to the fixing base are on the same plane as the measured section of the measured element 8 .

[0022] use figure 1 The shown "orthogonal mode" arranges three hat fins with prism sheets, and the observation points are CE1, CE2 and CE3 respectively.

[0023] The specific implementation is as follows:

[0024] (1) Selection and processing of the fixing seat: Select the fixing seat form of the measuring point reflection device and the installation mode of the hat fin according to the geometric size, material, cross-secti...

Embodiment 2

[0061] This embodiment is described by taking the measurement of the torsion and position parameters of the main cable of the suspension bridge as an example.

[0062] use figure 2 , 4 The shown "non-orthogonal mode" arranges three hat fins with prism sheets, and the observation point numbers are CE1, CE2, and CE3, respectively.

[0063] Embodiment is identical with embodiment 1.

[0064] In the case of using the "non-orthogonal mode" to arrange the hat fins, the coordinates of the center position of the cross-section of the main cable and the measured values ​​of the torsion angle are calculated according to formula (2) and formula (3), respectively.

[0065] Data processing method and calculation formula

[0066] Let the X-axis of the coordinate system be the horizontal direction of the bridge, and the side along the tension direction of the suspender is the positive direction; the Y-axis is the longitudinal direction of the bridge; the Z-axis is the vertical direction o...

Embodiment 3

[0087] Test effect of the present invention and economic benefit test comparison result

[0088] 1 Comparison of test effects of the present invention

[0089] In the model test research of a self-anchored suspension bridge with a space cable surface, the measurement of the spatial position and torsion angle of the main cable uses an inclinometer and the product of the present invention to compare the test results. The section was tested, and 5 cross-sectional positions of the main cable were selected for comparison. The method was: both the product of the present invention and the inclinometer were installed at the same cross-sectional position of the main cable. Taking the measurement results of the inclinometer as a comparison reference, by calculating the relative error between the angle value (increment relative to the initial value) measured by the method of the present invention and the angle value (increment relative to the initial value) measured by the inclinometer ...

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 a measuring device, in particular to a measuring device for the torsion characteristics measurement including a component torsion measurement or the main cable of a suspension bridge and the like, and further relates to the method beneficial for the measuring device to measure. The measuring device for element torsion and position parameters comprises a fixing seat, and is characterized by further comprising three optical reflectors connected with the fixing seat; the fixing seat can be fixed on a tested element, and three optical reflectors connected with the fixing seat and the tested section of the tested element are located on a same plane. A principle of using the device to measure is that the three-dimensional coordinates of three observation points of a measuring point reflection unit at all stages are measured through a total station; furthermore, the data processing is carried out on the obtained three-dimensional coordinate, so that the central coordinates and the torsion angles of the tested section of the main cable at all stages can be obtained. The measuring device provided by the invention is simple in structure, low in measurement cost and good in effect.

Description

technical field [0001] The invention relates to a measuring device, in particular to a measuring device which can be used to measure the torsion of components or the torsion characteristics of main cables of suspension bridges and the like. [0002] The invention also relates to a method of measurement facilitated by the above-mentioned measuring device. Background technique [0003] In addition to the structural characteristics of general suspension bridges, the suspension bridge with space cable surface also improves the lateral stiffness and torsional stiffness of the system because of the three-dimensional layout of the main cables and suspension cables, and increases the wind and earthquake resistance. increasingly widely used. However, when the main cable of the space cable surface suspension bridge is transformed from the state of the vertical surface of the empty cable to the space state of the bridge, there will be a torsion phenomenon. adverse effects of force. ...

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): G01M13/00G01C1/00G01C15/00
Inventor 曹水东李传习柯红军刘智侃肖光清郑亮亮
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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