Fabric tightness detecting apparatus

Abstract

The invention provides a fabric tightness detecting apparatus. The fabric tightness detecting apparatus comprises an apparatus body, the apparatus body is connected to a PLC industrial control machinearranged at the outer part of the apparatus body in a communication mode, the apparatus comprises a desk body, and further comprises a light source mechanism, a test box and a light receiving mechanism arranged on the desk body. The light source mechanism is arranged on one side of the top of the desk body, the light receiving mechanism is arranged on the other side of the top of the desk body, the test box is arranged between the light source mechanism and the light receiving mechanism, and central axial lines of the light source mechanism, the test box and the light receiving mechanism areon a same vertical plane. The fabric tightness detecting apparatus is based on a box method principle of light transmission, detecting is simple, detecting quantity is small, manual labor intensity islowered, the detecting efficiency is improved, and meanwhile, accuracy of detecting results is further improved, stability and reliability are high, and the fabric tightness detecting apparatus has good practical values.

Description

technical field [0001] The invention relates to the technical field of industrial testing equipment, in particular to a fabric tightness testing device. Background technique [0002] The tightness of the fabric is usually expressed by the ratio (%) of the total coverage area of ​​warp and weft yarns in the fabric to the total area of ​​the fabric. Under the same fabric structure, the greater the tightness of the fabric, the tighter the fabric, which reflects the fabric An indicator of the relative closeness of structural features. Tightness is an important factor affecting the appearance, texture and internal quality of fabrics, and it is also related to the amount of raw materials used in products. Therefore, tightness is an important parameter for fabric design and cost accounting. [0003] At present, the test method of fabric tightness is mainly calculation method. Assuming that the yarns that make up the fabric are uniform cylinders, the density and linear density of t...

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Problems solved by technology

But this method has the following defects: 1. The shape of the warp and weft yarns in the weaving process is not a cylinder, but an oblate circle, so it is not appropriate to use the equivalent diameter conversion as a cylinder, and the diameter only represents the yarn The width of the main body and the hairiness of the yarn are not considered in it, but it affects its coverage area; 2. When calculating the diameter of the yarn, according to the diameter calculation formula d=c*the square root of the linear density, where c is the diameter coefficient, Yarns of the same raw material have the same diameter coefficient, but in reality, due to the difference in the twist coefficient of the yarn, the fluffy degree of the yarn is quite different, and the equivalent diameter of the same raw material yarn with the same linear density may not be the same, so Generalization will lead to large errors; 3. There will be human errors in the warp and weft yarn density test in the fabric. Because the weaving shrinkage test of warp and weft yarns is difficult, there is no special instrument for measurement at present, and it can only be measured by hand. Roughly calculated by the method, but the relationship between the linear density and its length has a great influence, and it is difficult to control the tension during the hand-pulling process, resulting in poor accuracy; And no tension is required, and the reading must be estimated at the same time. The unexpected tension of the fabric will also affect the result by using the yarn tearing method, and for fabrics with complex weaves and uneven warp and weft density, the result error will be greater; 5. Due to the tightness of the fabric There are many quantities involved in the calculation and need to be measured one by one, resulting in high labor intensity and low detection efficiency

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