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Combining method for measuring fiber profile and mechanics behavior and equipment

A measurement method and optical measurement technology, which is applied in the direction of measuring devices, material analysis through optical means, and the use of stable torsion to test the strength of materials, etc., can solve the problems of inability to measure the characteristics of fiber neck points, etc., to achieve simple operation, The instrument mechanism is simple and the structure is exquisite

Inactive Publication Date: 2007-07-04
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

[0044] Embodiment 1, the force-displacement characteristic curve and parameters are obtained.

[0045] According to the measurement requirements, the fibrous sample cut to a certain length is clamped on the upper holder 61 and the lower holder 62; the stepper 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 stepper motor 52 rotates the rotating disk 51 to drive the lower clamping 62 to rotate at a certain angle, and there are two states: one is that the force sensor 71 connected to the lower clamper 62 senses that the force increases, and then rotates in the opposite direction; The force sensor 71 that is connected with the lower clamp 62 senses that the force becomes smaller, and then the moving beam 31 vertically moves down to the force sensor 71 that is connected with the lower clamp 62. The force sensor 71 should be the initial value; then, the lower clamp The device 62 ...

Embodiment 2

[0050] Example 2, results and cross-sections measured at different angles.

[0051] According to the measurement requirements, the polyester fiber sample with an approximately elliptical cross-section of 50 mm in length is clamped in the upper holder 61 and the lower holder 61; Stretch 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, and the upper holder 61 and the lower holder 62 rotate the fiber sample synchronously. The width of the section profile at this position changes from small to large, and then from large to small, then the profile is the major axis of the ellipse section. When the width of the section profile at this position changes from large to small, and then from small to large, the profile is The short axis of the ellipse section; then align the center of the optical axis of the optical meas...

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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, bundles of fibers, yarns and strings) under tension and torsion. It is mainly used for the evaluation of fiber mechanical properties and spinnability, the characterization of fiber weak points, the research of yarn strength unevenness, uneven fineness and weavable performance. Background technique: [0002] The specific strength at break of a single fiber has a direct impact on its spinning speed, spinnable count and yarn quality. It is an index that reflects the fiber strength more objectively, but it should be more accurate to measure the real stress at the fiber break point, because The fracture of the fiber material only occurs at its weakest point, or the structural weak point, or the geometric weak point (thin neck). The f...

Claims

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Application Information

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