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

Axial pre-tightening force double-wave measuring method

A technology of axial pretightening force and measurement method, which is applied in force/torque/power measuring instrument, measuring torque/torsion force during tightening, and measuring device, etc., which can solve the problems of simultaneous transmission and reception of dual waves, poor environmental adaptability of sensors, Detect problems such as redundant lines of equipment to achieve the effect of avoiding measurement errors or measurement failures, reducing the amount of collection and storage, and fast and high-precision measurement

Pending Publication Date: 2020-08-14
CHENGDU SCI & TECH DEV CENT CHINA ACAD OF ENG PHYSICS
View PDF5 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention provides a dual-wave measurement method for axial pretightening force, which realizes fast and high-precision ultrasonic dual-wave measurement of the axial pretightening force of fasteners, and solves the problem of poor environmental adaptability of sensors in the prior art and the inability to realize Simultaneous transmission and reception of dual waves, overly redundant detection equipment lines, fuzzy method implementation details, and measurement failure due to ultrasonic waveform distortion

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
  • Axial pre-tightening force double-wave measuring method
  • Axial pre-tightening force double-wave measuring method
  • Axial pre-tightening force double-wave measuring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0038] Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art so that those skilled in the art to which the present invention pertains can easily practice. As can be easily understood by those skilled in the art to which the present invention pertains, the embodiments to be described later can be modified into various forms without departing from the concept and scope of the present invention. In the drawings, the same or similar parts are denoted by the same reference numerals as much 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

The invention provides an axial pre-tightening force double-wave measuring method. The method comprises the steps: integrating a pre-tightening force sensor on one end face of a fastener in situ; determining parameters of the fastener; respectively acquiring transverse wave and longitudinal wave temperature compensation calibration curves of the fastener; measuring a sound time difference from theemission of the transverse wave and the longitudinal wave to the reception of the first echo, and taking the sound time difference ratio of the transverse wave and the longitudinal wave as a reference value; acquiring an axial pre-tightening force calibration curve between the sound time difference ratio of the transverse wave and the longitudinal wave and the axial pre-tightening force of the fastener under the same working condition; and applying a pre-tightening force to the fastener, and measuring the acoustic time difference ratio of the transverse wave to the longitudinal wave to obtainan axial pre-tightening force of the fastener corresponding to the sound time difference ratio. According to the invention, ultrasonic double-wave rapid high-precision measurement of the axial pre-tightening force of the fastener is realized, and problems of poor sensor environmental adaptability, incapability of realizing simultaneous receiving and transmitting of double waves, too redundant detection equipment lines, fuzzy implementation details of the method, measurement failure caused by ultrasonic waveform distortion and the like in the prior art are solved.

Description

technical field [0001] The invention relates to a method for measuring axial pretightening force, in particular to a method for measuring axial pretightening force with double waves. Background technique [0002] In the prior art, piezoelectric ceramic sheets are mostly used as ultrasonic transducers for the measurement of the pretightening force of fasteners, and the same piezoelectric oscillator needs to be pasted on both ends of the fastener as the transmitting end and reflecting end respectively, or Paste a piezoelectric ceramic sensor on one end of the fastener as the ultrasonic transceiver. On the one hand, the method, state, and thickness of the paste cannot guarantee the consistency of each fastener, and the measured value of batch fasteners has a large Due to the discrete nature of the measurement method, there is a large error and the measurement accuracy is not high. On the other hand, the introduction of the coupling adhesive makes the product have environmental ...

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): G01L5/24
CPCG01L5/246
Inventor 何绪林罗坤廖成叶勤燕郑兴平冉小龙
Owner CHENGDU SCI & TECH DEV CENT CHINA ACAD OF ENG PHYSICS
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