The textile testing technology carrier is a textile testing instrument. In recent decades, textile testing instruments have made great strides in testing mechanisms, mechatronics, micro-computer applications, test indicators, and types of test instruments. A number of large-capacity, intelligent, multi-functional, automated systems have emerged. High degree of new electromechanical integration instruments. The introduction of these new instruments marks the textile testing technology has reached a new level.
The development of modern textile inspection technology information technology has greatly promoted the progress of textile inspection technology. The application of computer technology, automation technology and communication technology in the field of textile testing has greatly enhanced the modern textile testing methods and capabilities. At present, the functions of textile testing equipment are increasingly perfected, and the intelligent and automated instruments are becoming more and more advanced. With advanced equipment, people have been able to change the performance of traditional raw materials into the inspection and prediction of fiber and yarn properties. Evaluate the quality of the finished product. Looking at the development of modern textile testing technology, it presents the following main features.
1, to maximize the level of automation of the test.
With the ISO 1973-1995 “Measuring Weighing and Vibration Method for Density of Textile Fibersâ€, which replaces the 1976 version of the single fiber length measurement method with the vibration method, various vibratory fineness meters have been developed abroad. The vibrating fineness meter requires no manual adjustment and no visual observation of the maximum fiber vibration. A one-button operation can provide an automatic test of the fiber linear density. This eliminates the need for human judgment and improves the accuracy of the fiber line density value. degree. Two operators operated the cotton fiber bulk test system and completed 180 test samples in only 1 hour. The test results of this system are not affected by the operators. The results are from a large number of samples, more representative, and the test results have good accuracy and reproducibility.
2. Widely apply high technology.
(1) Widespread use of computer technology: A new type of computer-controlled, fast-flow method for measuring raw fiber and wool densities using the newly introduced computer-controlled, internationally-available method requires only 3–5 g of fiber samples to eliminate the waste of time spent on controlling samples to constant weight. And the error of the sample itself. In the test of single fiber strength and elongation, new instruments are used for data collection, processing and display by computers. For example, the setting of the gauge length and the elongation at break can be adjusted in advance within the design range by computer software. At present, foreign countries are using the computer network and near-infrared spectrophotometer to determine fiber. The spectrum generated by the near-infrared spectrophotometer is further analyzed by the computer's central network to generate an ASCII file of the absorption spectrum. This method is fast and reliable. The central network can not only distinguish fibers of similar chemical composition but also identify the blended components of fibers.
(2) Application of digital image processing technology: The 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 lies not only in the measurement of fiber diameter and diameter distribution, but also in the measurement of the degree of curl of the medullary hair, dead hair and fibers.
(3) Application of laser technology: Australia's laser scanner (Sirolan) is used for the rapid determination of wool fiber diameter as with OFPA. The difference is that it uses laser scanning and computer control technology, using the thickness of the fiber diameter and the silicon photocell The linear correlation of the detected laser energy attenuation completes the test process in minutes and prints the average fiber diameter, CV value, effective root number and its distribution.
3, sensor methods and holders continue to be improved.
Textile testing instruments are developed from capacitive sensing to audio sensing and photoelectric sensing. Zweigle's Model G581 Uniformity Tester has two independent test devices. Each test device contains an acoustic chamber with an air vibration frequency of 3–5 Hz. The frequency change using the fiber assembly varies with the fiber bundles. The correlation of evenness can continuously measure the linear density and evenness of sliver and roving, and the test results are not affected by the surrounding environment.
Zweg's G580 Yarn Structure Tester uses Barco's light sensor to measure the yarn's structural data, not the change in weight, at 2mm per scan. Infrared test results are not affected by the mixing of test materials and the ambient atmosphere, improving the accuracy of the test.
4, fiber and yarn testing equipment to light, low-cost direction.
While foreign large-scale instrument manufacturers are consciously using the work environment to transform, they are striving to develop lightweight, low-cost instruments to meet the needs of the market. Rapid air flow measuring instrument RMl070 Compunaire is a portable instrument that does not require additional air flow devices and is easy to carry.
The Development Direction and Prospect of Modern Textile Testing Technology
1. Development of product simulation and quality forecasting and evaluation.
The important trend in the development of foreign textile testing instruments is to use the test results to quickly and reliably predict the quality of the product's process and finished product. Zweig has developed a simulation system that simulates woven or knitted fabrics by computer based on the test results of the G$80 type yarn structure tester, and pre-qualifies the fabric before the fabric has been woven. Assess and avoid wasted time and cost of weaving samples due to poor quality. The CSIRO's Sirolan Yarn Detector Package predicts yarn quality from sliver properties, narrowing the gap in fiber-to-fabric quality prediction and quality control.
2, to high-speed, efficient development.
The high-performance tensile tester Tensonjet of the Zellweger Uster Company has a test speed of up to 400 m/min and can perform 30,000 tensile tests per hour. The Sirolan Tensor, a fiber bundle fiber tester developed by CSIRO, has a multi-function collet. , Carding, applying pre-tensioning and tensile test can be completed at one time; Computer-controlled yarn friction and hairiness combination tester developed by SDL can test at any speed at 50–300m/min; Zweig The company's G580 Yarn Structure Tester, in addition to the test results is not affected by the test material mixture and the atmospheric environment, it can also provide a very wide range of yarn irregularity information, including the grading matrix, which can determine the appearance of a batch of yarns. Qualified or not, improve the timeliness of quality control.
3, from a single function to multi-functional development.
In the inspection of cotton fibers, instrumental evaluation was introduced in the 1950s, and the traditional equipment has a single function, is time-consuming, and labor-intensive. The HV1 is used for the comprehensive determination of the cotton fiber's quality performance. It takes only 10 minutes to complete a sample's linear density, length, strength, elongation at break, and color grading test; Tensojet is superior to other similar tensile testers. It is not only because of its high speed and large capacity, but also because it can show five types of percentiles. Some percentiles are closely related to the shutdown caused by a certain cause of the loom, and the user has to choose and use different yarns. Importantly important; Zvegger's G580-Cyros yarn quality control system not only provides a realistic assessment of the yarn structure for reliable yarn structure and performance, but also provides a number of potentially relevant quality analyses with the aid of optical uniformity. With the tester and three-dimensional fabric images, the G580-Cyros system can replace fabric prototypes to truly reproduce fabric conditions.
4, from the test laboratory to the development of the network.
Some large-scale instrument manufacturers such as Zweig and Zeerveg Uster have been developing test instrument data analysis systems based on computer network technology. The system can be used to network test equipment and central computers. The central computer can obtain data from all networked instruments and process them. Finally, the required results are gathered on a laboratory report sheet. Zveg's Windows Texdata is such a system.
References [1] Zhou Liping, Extensive latest standards for ecological textile products and technical application and quality control manual, Anhui; Anhui Culture and Audiovisual Press, 2004.
[2] Inspection and Supervision Department of AQSIQ. Domestic and foreign textile and garment technical regulations. Beijing: China Standard Press. 2004.
[3] Institute of Textile Industry Standardization. National Cotton Textile Product Quality Supervision and Inspection Center. National guidelines for the implementation of basic safety technical specifications for textile products. Beijing: China Standard Press. 2006.
(Author: National Ecological Textile Quality Supervision and Inspection Center, Qingdao Textile Fiber Inspection Institute)
The development of modern textile inspection technology information technology has greatly promoted the progress of textile inspection technology. The application of computer technology, automation technology and communication technology in the field of textile testing has greatly enhanced the modern textile testing methods and capabilities. At present, the functions of textile testing equipment are increasingly perfected, and the intelligent and automated instruments are becoming more and more advanced. With advanced equipment, people have been able to change the performance of traditional raw materials into the inspection and prediction of fiber and yarn properties. Evaluate the quality of the finished product. Looking at the development of modern textile testing technology, it presents the following main features.
1, to maximize the level of automation of the test.
With the ISO 1973-1995 “Measuring Weighing and Vibration Method for Density of Textile Fibersâ€, which replaces the 1976 version of the single fiber length measurement method with the vibration method, various vibratory fineness meters have been developed abroad. The vibrating fineness meter requires no manual adjustment and no visual observation of the maximum fiber vibration. A one-button operation can provide an automatic test of the fiber linear density. This eliminates the need for human judgment and improves the accuracy of the fiber line density value. degree. Two operators operated the cotton fiber bulk test system and completed 180 test samples in only 1 hour. The test results of this system are not affected by the operators. The results are from a large number of samples, more representative, and the test results have good accuracy and reproducibility.
2. Widely apply high technology.
(1) Widespread use of computer technology: A new type of computer-controlled, fast-flow method for measuring raw fiber and wool densities using the newly introduced computer-controlled, internationally-available method requires only 3–5 g of fiber samples to eliminate the waste of time spent on controlling samples to constant weight. And the error of the sample itself. In the test of single fiber strength and elongation, new instruments are used for data collection, processing and display by computers. For example, the setting of the gauge length and the elongation at break can be adjusted in advance within the design range by computer software. At present, foreign countries are using the computer network and near-infrared spectrophotometer to determine fiber. The spectrum generated by the near-infrared spectrophotometer is further analyzed by the computer's central network to generate an ASCII file of the absorption spectrum. This method is fast and reliable. The central network can not only distinguish fibers of similar chemical composition but also identify the blended components of fibers.
(2) Application of digital image processing technology: The 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 lies not only in the measurement of fiber diameter and diameter distribution, but also in the measurement of the degree of curl of the medullary hair, dead hair and fibers.
(3) Application of laser technology: Australia's laser scanner (Sirolan) is used for the rapid determination of wool fiber diameter as with OFPA. The difference is that it uses laser scanning and computer control technology, using the thickness of the fiber diameter and the silicon photocell The linear correlation of the detected laser energy attenuation completes the test process in minutes and prints the average fiber diameter, CV value, effective root number and its distribution.
3, sensor methods and holders continue to be improved.
Textile testing instruments are developed from capacitive sensing to audio sensing and photoelectric sensing. Zweigle's Model G581 Uniformity Tester has two independent test devices. Each test device contains an acoustic chamber with an air vibration frequency of 3–5 Hz. The frequency change using the fiber assembly varies with the fiber bundles. The correlation of evenness can continuously measure the linear density and evenness of sliver and roving, and the test results are not affected by the surrounding environment.
Zweg's G580 Yarn Structure Tester uses Barco's light sensor to measure the yarn's structural data, not the change in weight, at 2mm per scan. Infrared test results are not affected by the mixing of test materials and the ambient atmosphere, improving the accuracy of the test.
4, fiber and yarn testing equipment to light, low-cost direction.
While foreign large-scale instrument manufacturers are consciously using the work environment to transform, they are striving to develop lightweight, low-cost instruments to meet the needs of the market. Rapid air flow measuring instrument RMl070 Compunaire is a portable instrument that does not require additional air flow devices and is easy to carry.
The Development Direction and Prospect of Modern Textile Testing Technology
1. Development of product simulation and quality forecasting and evaluation.
The important trend in the development of foreign textile testing instruments is to use the test results to quickly and reliably predict the quality of the product's process and finished product. Zweig has developed a simulation system that simulates woven or knitted fabrics by computer based on the test results of the G$80 type yarn structure tester, and pre-qualifies the fabric before the fabric has been woven. Assess and avoid wasted time and cost of weaving samples due to poor quality. The CSIRO's Sirolan Yarn Detector Package predicts yarn quality from sliver properties, narrowing the gap in fiber-to-fabric quality prediction and quality control.
2, to high-speed, efficient development.
The high-performance tensile tester Tensonjet of the Zellweger Uster Company has a test speed of up to 400 m/min and can perform 30,000 tensile tests per hour. The Sirolan Tensor, a fiber bundle fiber tester developed by CSIRO, has a multi-function collet. , Carding, applying pre-tensioning and tensile test can be completed at one time; Computer-controlled yarn friction and hairiness combination tester developed by SDL can test at any speed at 50–300m/min; Zweig The company's G580 Yarn Structure Tester, in addition to the test results is not affected by the test material mixture and the atmospheric environment, it can also provide a very wide range of yarn irregularity information, including the grading matrix, which can determine the appearance of a batch of yarns. Qualified or not, improve the timeliness of quality control.
3, from a single function to multi-functional development.
In the inspection of cotton fibers, instrumental evaluation was introduced in the 1950s, and the traditional equipment has a single function, is time-consuming, and labor-intensive. The HV1 is used for the comprehensive determination of the cotton fiber's quality performance. It takes only 10 minutes to complete a sample's linear density, length, strength, elongation at break, and color grading test; Tensojet is superior to other similar tensile testers. It is not only because of its high speed and large capacity, but also because it can show five types of percentiles. Some percentiles are closely related to the shutdown caused by a certain cause of the loom, and the user has to choose and use different yarns. Importantly important; Zvegger's G580-Cyros yarn quality control system not only provides a realistic assessment of the yarn structure for reliable yarn structure and performance, but also provides a number of potentially relevant quality analyses with the aid of optical uniformity. With the tester and three-dimensional fabric images, the G580-Cyros system can replace fabric prototypes to truly reproduce fabric conditions.
4, from the test laboratory to the development of the network.
Some large-scale instrument manufacturers such as Zweig and Zeerveg Uster have been developing test instrument data analysis systems based on computer network technology. The system can be used to network test equipment and central computers. The central computer can obtain data from all networked instruments and process them. Finally, the required results are gathered on a laboratory report sheet. Zveg's Windows Texdata is such a system.
References [1] Zhou Liping, Extensive latest standards for ecological textile products and technical application and quality control manual, Anhui; Anhui Culture and Audiovisual Press, 2004.
[2] Inspection and Supervision Department of AQSIQ. Domestic and foreign textile and garment technical regulations. Beijing: China Standard Press. 2004.
[3] Institute of Textile Industry Standardization. National Cotton Textile Product Quality Supervision and Inspection Center. National guidelines for the implementation of basic safety technical specifications for textile products. Beijing: China Standard Press. 2006.
(Author: National Ecological Textile Quality Supervision and Inspection Center, Qingdao Textile Fiber Inspection Institute)
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