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Combining method for measuring fiber profile and mechanics behavior and equipment

A measurement method and optical measurement technology, which can be used in measurement devices, material analysis by optical means, and testing of material strength by applying a stable torsion force.

Inactive Publication Date: 2005-03-30
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since SIFAN uses a horizontal method for fiber profile and mechanical measurement, there are not only problems with the accuracy and stability of force measurement, but also there is a blind area for fiber shape measurement in this test method. When the weak joint is located in the blind area, the sample cannot measure the fineness of the fiber. neck feature

Method used

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  • Combining method for measuring fiber profile and mechanics behavior and equipment
  • Combining method for measuring fiber profile and mechanics behavior and equipment
  • Combining method for measuring fiber profile and mechanics behavior and equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] In Example 1, the force-displacement characteristic curve and parameters were obtained.

[0044] According to the measurement requirements, clamp a certain length of fibrous material sample to the upper holder 61 and the lower holder 61; the stepping motor 33 rotates the screw 32 to drive the moving beam 31 to move down vertically to apply a predetermined tension to the sample ; The stepping motor 52 rotates the rotating disk 51 to drive the lower clamp 62 to rotate to a certain angle, and there are two states: one is that the force sensor 71 connected to the lower clamp 62 increases inductively and rotates in the opposite direction; If the force sensor 71 connected to the lower gripper 62 becomes smaller, the moving beam 31 moves down vertically until the force sensor 71 connected to the lower gripper 62 should receive the initial force; then, the lower gripper The device 62 continues to rotate, and the moving beam 31 continues to move vertically downwards;...

Embodiment 2

[0064] Example 2, the results and cross-sections measured at different angles.

[0065] According to the measurement requirements, clamp the polyester fiber sample of approximately elliptical cross-section with a cut length of 50mm in the upper holder 61 and the lower holder 61; according to the measurement procedure of Example 1, the sample is completely untwisted to achieve natural Straightened state; align the optical axis center of the optical measuring mechanism 2 with the fiber sample, automatically adjust the focus and obtain the cross-sectional profile of the fiber sample at this position, the upper holder 61 and the lower holder 62 rotate the fiber sample synchronously, when The cross-sectional profile width at this location changes from small to large, and then from large to small, then this profile is the long axis of the ellipse section. The short axis of the elliptical section; then align the center of the optical axis of the optical measurement mecha...

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Abstract

The invention relates to a combined method for measuring contour of fibred thing and its mechanical behviour and its equipment. Said method includes holding two ends of sample, axially moving noe end along the holder and coaxially turning to make the sample be naturally stratched and removing its unforeseen torsion; scanning contour of sample and synchronously turning two ends at a certani angle, secondary scanning contour of sample so as to obtain the sample form characteristics; moving one end ofsample and applying deformation to measure mechanical behaviour of sample, at the same time real-time scanning the change of thinest place of said sample and using digital camera to shoot instant image when the sample is broken so as to obtain its broken form and position. Said equipment incldues a pair of holders, a pair of force sensors connected with holders, optical measurement mechanism, digital camera, holder turning mechanism, movement driving mechanism, signal collecting, controlling and processing system and computer, etc.

Description

Technical field: [0001] The invention belongs to the technical field of textile precision measuring instruments, and relates to a combined measurement method and device for the contour shape and mechanical behavior of fibrous objects (single fibers, bundle fibers, yarns and strings) under tension and torsion. It is applicable It is used for the evaluation of fiber mechanical properties and spinnability, the characterization of fiber weakness, the study of yarn strength unevenness, fineness unevenness and weaving properties. Background technique: [0002] The breaking strength of a single fiber has a direct impact on its spinning speed, spinnable count and yarn quality. It is a more objective indicator of fiber strength, but the more accurate measurement should be the real stress measurement at the fiber breaking point, because The fracture of the fiber material only occurs at its weakest point, or structural weakness, or geometric weakness (neck). The factors that affect the true...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/00G01N3/08G01N3/22G01N21/84G01N33/36G01N35/00
Inventor 于伟东杜赵群
Owner DONGHUA UNIV
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