APPLICATION OF THE ULTRASONIC METHOD WITH LONGITUDINAL WAVE PROPAGATION FOR MEASURING THE TENSION OF TEXTILE MATERIALS

Abstract

The paper considers the possibility of applying the ultrasonic method of measuring the tension of textile fabrics with longitudinal wave propagation in the fibers of the controlled material. The use of such a method to control the tension of the material will allow to quickly determine the specified parameter during the production process. This will allow in the future to improve textile machines for the production of finished cloths and tapes with current correction of material tension directly on the technological equipment using non-contact sensors.

Currently, there is a significant demand for textile materials, which contributes to a significant expansion of their assortment. This determines the need to improve the quality of such materials, therefore, modern technological equipment for the production of textile materials requires the use of operational control of technological parameters to improve the productivity and quality of finished products.

One of the main technological parameters in the production of textile materials is their tension. Exceeding the tension of the threads causes their increased breakage, which leads to shortages, downtimes of technological equipment and a decrease in its productivity. Taking into account the fact that thread tension control and regulation systems on technological equipment are mainly mechanical and contact, their use does not allow for operational technological determination of tension.

The existing contact mechanical means of tension measurement exert an influence directly on the textile material itself. This can lead to the occurrence of additional material tension during its control, which can introduce a significant error in the measurement of the main tension. There are also optical devices for determining the tension of textile materials, the use of which is significantly limited due to significant dustiness in the production premises of textile factories. Carrying out the technological process of the production of textile materials without operational technological control of the current value of the tension on textile machines does not allow to obtain high-quality finished products and to ensure the saving of raw materials due to the exclusion of defects and the production of textile materials in the negative field of tolerance in terms of surface density. Therefore, it is advisable to use the methods of operational technological control of the tension of textile materials in the production process, which can be implemented only by non-contact methods and appropriate means of measuring the current value of the tension.