The origin and development of modern textile testing technology

The carrier of textile testing technology is textile testing instruments. In recent decades, textile testing instruments have made great progress in testing mechanism, level of mechatronics, microcomputer applications, testing indicators, and types of testing instruments. A number of capacities have emerged. It is a new type of mechatronics instrument with large, intelligent, multi-functional and high degree of automation. The introduction of these new instruments marks a new level of textile inspection technology. The development of information technology of modern textile testing technology has greatly promoted the progress of textile testing technology. The application of computer technology, automation technology and communication technology in the field of textile testing has greatly improved the means and capabilities of modern textile testing. At present, the functions of textile testing equipment are becoming more and more perfect, and the degree of intelligence and automation of the instruments is getting higher and higher. With advanced equipment, people have been able to change from the inspection of the performance of traditional raw materials to the inspection and prediction of the performance of fiber and yarn. Evaluation of finished products the quality of. Throughout the development of modern textile testing technology, it presents the following main characteristics. 1. Maximize the level of test automation. With ISO 1973— The 1995 'Weighing and Vibration Method for Determination of Linear Density of Textile Fibers' replaced the single fiber length measurement and weighing method in the 1976 edition with the vibration method. The vibrating fineness meter does not require manual adjustment or visual observation of the maximum value of fiber vibration, and can provide automatic testing of fiber linear density with a single key operation. Because no human judgment is required. Thus, the accuracy of the fiber linear density value is improved. ．Two operators operate the cotton fiber high-volume testing system. To complete the test of 180 samples, only 1h. The test results of the system are not affected by the operator. The results come from a large number of samples, and the more representative test results have better accuracy and reproducibility. 2. High-tech is widely used. (1) Wide application of computer technology: a new type of computer-controlled rapid air flow method for measuring the linear density of raw cotton and wool recently launched in the world, which only needs 3g to 5g of fiber samples, eliminating the waste of time due to control samples to fixed weights and the error of the sample itself. In the single fiber strength and elongation test, the new instruments all use computers to collect, process and display data, such as the setting of gauge length and elongation at break, which can be adjusted in advance through computer software within the design range. At present, the fiber is identified by computer central network and near-infrared spectrophotometer in foreign countries. The spectrum generated by the near-infrared spectrophotometer is further analyzed through the computer central network to generate the ASCl file of the absorption spectrum. The method is fast and reliable. The central network can not only distinguish fibers of similar chemical composition, but also identify the blending composition of fibers. (2) Application of digital image processing technology: Optical Fiber Diameter Analyzer (OFDA) uses digital image processing technology to determine the average diameter and diameter distribution of wool fibers, and can test 10,000 fibers per minute. The greatest value of OFDA is not only in testing fiber diameter and diameter distribution but also in medullary hair, dead hair and fiber curl. (3) Application of laser technology: Australia's laser scanner (Sirolan) is used for rapid determination of wool fiber diameter like OFDA, the difference is that it uses laser scanning and computer control technology, using the thickness of fiber diameter and silicon photocells. Linear dependence of the detected laser energy decay. Complete the whole process of testing in a few minutes. And print out the average value of fiber diameter, and the effective number of fibers and their distribution. 3. Sensing methods and grippers are constantly being advanced. Textile testing instruments are developed from capacitive sensing to i-frequency sensing and photoelectric sensing. Germany's Zweigle (Zweigle) company's G580 uniformity e tester has two independent test devices. } A test setup contains an audio chamber. The air vibration frequency is 3Hz ~ 5Hz. Using the correlation between the sound frequency change of the fiber and the uniformity of the fiber bundle, the linear density and uniformity of the sliver and the thickness can be continuously measured. The test results are not affected by the surrounding environment. Zweig's G580 Yarn Structure Tester uses a Barco light sensor to measure yarn structure data rather than weight: 2 ram per scan. The infrared test results are not affected by the mixture of test materials and the ambient atmosphere, which improves the accuracy of the test. 4. Fiber and yarn testing instruments are developing in the direction of portability and low cost. Large-scale foreign instrument manufacturers are consciously applying: while making environmental transformation, they strive to develop light and low-cost instruments to meet the needs of the market. The fast airflow analyzer RM1070Compunaire is a portable instrument that does not need to configure another airflow device. Easy to carry . 1. Develop towards finished product simulation and quality prediction and evaluation. An important trend in the development of foreign textile testing instruments is the use of test results to quickly and reliably predict product processing and finished product quality. Zweig has developed a simulation system. According to the test results of the G580 type yarn structure tester, the woven or knitted fabric is simulated by computer, and the quality of the fabric is pre-assessed before the weaving. Avoid wasted time and cost of weaving samples due to poor quality.

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