2016 my country's textile testing technology industry forecast report

With the development of science and technology, various high and new technologies have been continuously injected into the textile industry, bringing new vitality to the textile industry. Throughout the development of the international textile industry, new textile technology, textile machinery and equipment are constantly emerging, the textile industry is showing rapid changes, and textile testing technology and testing instruments are also developing rapidly. 1. The application of new technology in textile inspection 1. The application of infrared spectroscopy in the identification of textile fibers. The infrared spectrometer used in the identification of textile fibers-Fourier transform infrared spectrometer is made by using the principle of light dispersion, and its identification principle is : When the light from a person passing through an object is dispersed by a monochromator such as a prism, a grating, etc., the composite light is divided into monochromatic light, which is arranged on the slit plane in order of wavelength, and the signal is received by the detector. The intensity of the colored light is measured to obtain the absorption spectrum of the sample. In the infrared spectrometer used before, only a very narrow section of light falls on the detector at every moment of scanning, and the sensitivity and detection speed are limited, while the Fourier transform infrared spectrometer uses a Michelson interferometer to make the spectral signal 'multiple'. TransmissionAnd work efficiency. By analyzing the infrared spectrogram of a large number of textile fibers, we can grasp their infrared spectroscopic characteristics to realize the quantitative analysis of the proportion of blended fabrics. 2. The application of laser detection in textiles Among the radiation sources used by photoelectric detection devices, lasers have a particularly important position. The light-emitting principle of laser is completely different from ordinary light source, which breaks through the limitations of ordinary light source fundamentally, and has excellent characteristics different from ordinary light source. Laser detection is an important aspect of laser used in the textile industry. It can be used to inspect fabrics, detect fabric pilling, hairiness and coarse sugar content, fabric weft; determine yarn diameter, unevenness, yarn shelter and fiber properties ; Control printing and dyeing and inspection of clothing, etc. 2.1. Laser cloth inspection uses photoelectric methods to find defects on the surface of the fabric, mainly based on the difference between the reflectance of the fabric surface at the defect site and the surface of the fabric without defects. When the laser radiation is transferred from the non-defective part of the fabric surface to the defective part, the reflected light reflected from the fabric surface will change. Therefore, when a more obvious defect B appears in the field of view of the photoelectric receiver, It will cause irregular changes in the illuminance of the photoelectric receiver. At this time, use an image analyzer for analysis, and then the computer can display the results. Laser cloth inspection not only improves labor efficiency, but also improves the accuracy of detection. 2.2. Laser detection of fabrics. The objective evaluation of pilling fabrics by laser detection method is to establish the pellet grading standard based on the number of pillings, the height of the pellets and the total projected area of u200bu200bthe pellets per unit area, and then compare the sample with it. Assess the pilling level of the fabric; for the fabric roughness, the laser sensor measures the height of the fabric at different positions through the triangulation technique. In the past, the detection of pilling and roughness of fabrics was subjectively evaluated by experts or by contact measuring instruments. The supervisor's evaluation results lacked reliability and consistency. However, the use of laser detection overcomes the above-mentioned drawbacks and achieves rapid and accurate detection. 2.3. Laser detection Yarn The beam reflected by the laser is projected onto the yarn under test after beam expansion. The yarn under test blocks a part of the light flux, and the rest is received by the photocell at the back and converted into photocurrent and photovoltage. The thickness of the yarn is different, the luminous flux blocked is also different, and the size of the photovoltage and the photocurrent are different. In this way, the change in the thickness of the yarn is converted into the change of the photocurrent and the photovoltage. This photoelectric signal is A weak signal that needs to be amplified and filtered to make it an analog voltage signal corresponding to unevenness, and then the computer outputs the result in the form of digital or graphics. 3. Application of image processing technology in textiles At present, computer image information processing technology is used in many aspects of the textile industry: on the one hand, it is used in the development of textile testing technology and textile instruments, such as: fiber fineness determination, yarn evenness Unevenness, hairiness, defects, fabric inspection, etc., so in-depth and systematic research on the application of image information processing technology in textile technology testing will promote the upgrading of a considerable number of textile instruments; on the other hand, it is used in fabric simulation In the CAD system, fabric simulation technology is used to develop new products. For example, the fabric simulation CAD system developed by the China Textile Research Institute is a software that uses simulation methods to develop fabric products.

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