Check patentability & draft patents in minutes with Patsnap Eureka AI!

A Correction Method of Eccentricity Parameters of Archimedes Helix Plane Thread

A technology of Archimedes spiral and flat thread, which is applied in the direction of measuring devices, special data processing applications, instruments, etc., to achieve the effects of improving accuracy, perfecting measurement models, and solving principle defects

Active Publication Date: 2017-09-08
ZHEJIANG MEASUREMENT SCI RES INST
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the measurement model of this method is in e0 The approximate measurement model derived under certain circumstances, in the case of high measurement accuracy requirements, or in the case of large eccentricity, the defects of the Limacon model will be highlighted

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
  • A Correction Method of Eccentricity Parameters of Archimedes Helix Plane Thread
  • A Correction Method of Eccentricity Parameters of Archimedes Helix Plane Thread
  • A Correction Method of Eccentricity Parameters of Archimedes Helix Plane Thread

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0040] Such as figure 1 As shown, in the present invention, the measured plane thread 2 is placed on the grating disk 3, and the center of the measured plane thread 2 has a processing hole 5, and the rotation of the center of rotation drives the measured workpiece (Archimedes spiral) installed on the rotating shaft. plane thread) and the grating disc rotate simultaneously, using the reading θ of the grating disc i and the reading ρ of the grating ruler i , the measurement obtains i sampling points p i (ρ i ,θ i ), by x i = ρi cosθ i ,y i = ρ i sinθ i converted to p i (x i ,y i ), the Archimedes helix planar thread measurement model is established in the Cartesian coordinate system. And based on the measurement model, the objective function is decomposed by the Taylor series expansion method, and then iteratively processed...

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 Archimedes spiral planar thread measurement model and an eccentric parameter correction method. The method includes: aligning a tested planar thread to the center of a grating disk, setting a rectangular coordinate system on a plane of planar thread measurement points, and measuring to acquire a series of sampling points; substituting each sampling point into an objective function, decomposing the objective function according to a taylor series expansion method, and adopting a Levenberg-Marquardt calculation method for iteration to obtain eccentric parameters, Archimedes spiral rate and corrected sampling points. Influences of the eccentric parameters on Archimedes spiral planar thread measurement can be completely reflected by the Archimedes spiral planar thread measurement model, the problems of low precision in parameter estimation and principle defects of measurement models used generally at present are solved by the eccentric parameter correction method, and the requirement on centering accuracy of rotary measurement devices is lowered.

Description

technical field [0001] The invention relates to a measurement model and a correction method of a threaded workpiece, in particular to an Archimedes helix plane thread measurement model and a correction method for an eccentricity parameter in the technical field of surface shape measurement. Background technique [0002] The basic structure diagram of the existing plane thread measuring device is as follows: figure 1 As shown: the grating disc 3 is coaxially fixedly connected with the rotary center 4; the measured plane thread 2 is installed above the grating disc 3 and is concentric with the rotary center 4; the grating scale 1 matched with the grating disc 3 is located on the measured plane thread 2 . [0003] In this measuring device, there are mainly three kinds of errors: [0004] (1) The polar diameter measurement error caused by the grating ruler not passing through the center of rotation; [0005] (2) The polar angle measurement error caused by the misalignment bet...

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): G06F17/50G01B11/24
Inventor 茅振华叶欣陈挺周闻青卢歆毛晓辉陈元杰汪黎栋吴春晖单越康
Owner ZHEJIANG MEASUREMENT SCI RES INST
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com