Abstract:The most common measuring method to characterise the dynamic yarn path in the ring spinning process is to measure the yarn tension, where the yarn path is almost straight. However, it is much more complex to measure the yarn tension at the other positions, for example, between the yarn guide and traveller (balloon zone) and between the traveller and winding point of the cop (winding zone), as the yarn rotates continuously around the spindle axis. In this paper, two new methods of yarn tension measurement in th… Show more
“…Sensor S7 is made to verify the functional relationship shown in equation (18). First, we obtain parameters D l = 1:4 and D t = 2:3 of S7 from Table 2.…”
Section: Function Between Sensor Sensitivity and Idt Position Parametersmentioning
confidence: 99%
“…As a result, the accurate measurement of yarn tension is an urgent problem. 18 The SAW yarn tension sensor was proposed 19 for this purpose. It exhibits advantages such as low cost, reproducibility, and anti-interference, especially compared with traditional yarn tension sensors.…”
In this paper, the effect of the interdigital transducer (IDT) position parameters on the surface acoustic wave (SAW) yarn tension sensor sensitivity is investigated. The stress–strain characteristic of substrate was studied by the combination of finite element simulation and regression analysis method. According to this characteristic, the function relationship between the SAW yarn tension sensor sensitivity and the IDT position parameters was built using the regression analysis method. The monotonicity of the regression function was also given. On this basis, a novel sensitivity optimal scheme was proposed and solved by the quadratic programming method. Its solution demonstrates that the optimum sensitivity can be obtained when the IDT is 8.9 mm to the left side of the substrate and the IDT is 0.3 mm to the top edge of the substrate within a domain of the IDT position parameters. The SAW yarn tension sensor with corresponding IDT position parameters was fabricated to validate the correctness of the sensitivity optimal scheme. The measured results indicate that the SAW yarn tension sensor sensitivity can reach 813.69 Hz/g, which confirms that the novel scheme is effective.
“…Sensor S7 is made to verify the functional relationship shown in equation (18). First, we obtain parameters D l = 1:4 and D t = 2:3 of S7 from Table 2.…”
Section: Function Between Sensor Sensitivity and Idt Position Parametersmentioning
confidence: 99%
“…As a result, the accurate measurement of yarn tension is an urgent problem. 18 The SAW yarn tension sensor was proposed 19 for this purpose. It exhibits advantages such as low cost, reproducibility, and anti-interference, especially compared with traditional yarn tension sensors.…”
In this paper, the effect of the interdigital transducer (IDT) position parameters on the surface acoustic wave (SAW) yarn tension sensor sensitivity is investigated. The stress–strain characteristic of substrate was studied by the combination of finite element simulation and regression analysis method. According to this characteristic, the function relationship between the SAW yarn tension sensor sensitivity and the IDT position parameters was built using the regression analysis method. The monotonicity of the regression function was also given. On this basis, a novel sensitivity optimal scheme was proposed and solved by the quadratic programming method. Its solution demonstrates that the optimum sensitivity can be obtained when the IDT is 8.9 mm to the left side of the substrate and the IDT is 0.3 mm to the top edge of the substrate within a domain of the IDT position parameters. The SAW yarn tension sensor with corresponding IDT position parameters was fabricated to validate the correctness of the sensitivity optimal scheme. The measured results indicate that the SAW yarn tension sensor sensitivity can reach 813.69 Hz/g, which confirms that the novel scheme is effective.
“…The investigation of integrating a suitable SMB system to the existing ring spinning machine in place of the ring/traveler system has already proven its functionality as a new twisting system. 10–19 Figure 1.Principle of superconducting magnetic bearing-based ring spinning. 13 …”
Section: Principle Of Ring Spinning Process With Superconducting Magnmentioning
confidence: 99%
“…The investigation of integrating a suitable SMB system to the existing ring spinning machine in place of the ring/traveler system has already proven its functionality as a new twisting system. [10][11][12][13][14][15][16][17][18][19] In the SMB spinning process, the frictional heat occurring between the ring and the traveler has been eliminated with the SMB system. It is therefore important to explore the influence of spinning methods (i.e.…”
Section: Principle Of Ring Spinning Process With Superconducting Magnmentioning
The fundamental research work about the superconducting magnetic bearing (SMB) twisting system provides huge potential to eliminate the most important limitation of productivity, that is, the friction in the ring traveler system of the existing ring spinning process. As a continuity of the research work, the functionality of the SMB spinning has been carried out with different angular spindle speeds, yarn counts, and materials in order to determine the influence of the SMB technology. The current paper presents a comparative investigation of the yarn properties, such as yarn tenacity, yarn elongation, yarn evenness, microscopic views, etc., between conventional and SMB ring spun yarn. The intensive analysis confirms that the SMB system enables one to produce satisfactory yarn quality similar to that of conventional ring spun yarn up to 15,000 rpm. The influence of conventional and SMB spinning processes on yarn properties has been further analyzed statistically using an analysis of variance.
“…may be adjusted conveniently according to various textile fabrics’ requirements, real time detection, and display of these parameters’ availability. Two new methods of yarn measurement in balloon zone were proposed by Hossain et al 30 .…”
The textile industry has a great role in the improvement of any country’s economy. Moreover, the ready-made garments need different coloured high yarn quality, so yarn should be rewinded on plastic cones for dyeing. However, manufacturers are facing the problem of tension variation during soft winding process that mainly affects the yarn quality. Consequently, to overcome the tension variation drawbacks, the attainment of constant optimal tension values is required in order to: (1) Increase the winding speed while maintaining the yarn quality, (2) Improve the dyeing quality, and (3) Reduce the water consumption during the dyeing process. In this paper, a proposed yarn tension control technique is introduced to upgrade the soft winding machine, thus maintain the yarn quality and improve the manufacturing capacity. The proposed technique has been tested on Polyester yarn samples classified as; fine, medium and coarse yarn counts, to cover most yarn sizes used in the industry. Arduino Mega 2560 controller is utilized to implement the proposed tension control. The results are compared to the conventional system to advocate the effectiveness and capability of the proposed technique in overcoming the trade-off between tension control and machine speed that occurs in conventional system using variable tension levels.
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