DESIGN OF A COMPUTERIZED INFORMATION AND MEASUREMENT SYSTEM FOR DETERMINING TENSION OF TEXTILE MATERIAL BY ULTRASONIC METHOD

Abstract

When manufacturing fabrics from textile materials, threads, yarns, the manufacturer sets the goal of obtaining high-quality products, which will be used to further create high-quality clothing and other products. In order to achieve this goal, it is necessary to constantly measure and control the main parameters of textile tension on technological equipment. The parameters of the material tension affect the uniformity of textile fabrics, their basis weight and the downtime of textile machines when threads break during the technological process, which also affects financial losses for the enterprise. With accurate measurements of thread tension on textile machines and its control, the basis weight and uniformity of the produced textile fabrics will ensure high quality products with less downtime of the equipment during its repeated refilling. To measure these parameters, most textile production enterprises use contact tension measurement sensors, for example, strain gauges, as well as mechanical devices for its correction. Also, modern enterprises of the textile industry can use non-contact optical or acoustic sensors of material tension, which, in turn, completely eliminate errors due to the appearance of friction force between the surface of the primary transducer and the controlled material, but with high dustiness in the room (for optical sensors) and at a low frequency range (for acoustic frequency range sensors), which may include noise signal frequencies, their sensitivity and accuracy are sharply reduced. To solve this problem, a method for measuring the tension parameter of a textile material using waves of the ultrasonic frequency range is proposed. This ultrasonic method will allow for non-contact measurement of the tension of textile materials in the production process.

To improve the ultrasonic non-contact method of measuring the tension of textile materials, it is necessary to perform the following tasks: to analyze the theory of propagation and attenuation of an ultrasonic pulse signal passing through the controlled material; show the main ratios of the amplitudes of the ultrasonic wave interacting with the controlled material and the wave that only falls on the textile material; develop a project of an information and measurement system for determining the tension of a textile material; apply an algorithm for processing measurement information and make appropriate calculations based on the function of converting the amplitude parameters of ultrasonic waves into a change in the value of the tension parameter of the textile material, which will be used in a computerized information and measurement system.

For accurate measurements and control of the tension of textile materials, it is necessary to take into account their mechanical parameters, the value of the through and interfiber porosity and the size of the equivalent diameter of the threads, which can vary in a certain range. Depending on these parameters, it is necessary to correctly configure the measuring system to implement a non-contact ultrasonic method for measuring the tension of textile material.