Changes in the Characteristic Impedance of Textile Signal Lines While Mechanically Loaded

Abstract

The paper presents studies over the changes in the characteristic impedance of selected type of textile signal lines (TSLs) during mechanical loads. The article describes the construction of tested lines, the measurement method, and statistical analysis of the collected results.

Influence of Mechanical Deformations on the Characteristic Impedance of Sewed Textile Signal Lines

“…The plan of dividing the TSLs into groups was to include in each of the three subgroups at least five different lines. Also, the substrates had three specified weaves: plain, twill, and satin, and then all TSL were divided into three groups of the specified weave, the same method used earlier in [ 20 ].…”

“…The value of the TSL characteristic impedance depends mainly on the geometrical dimensions of such elements, the dielectric properties of the substrate and the resistance of the material from which the electrically conductive paths were made. Earlier, only straight TSLs were made and tested [ 20 ]. In a straight signal line, the electro-conductive paths are in the form of straight lines.…”

“…Leśnikowski [ 19 ] investigated the influence of temperature and humidity on textile signal lines in the form of electrically conductive textile strips sewn onto non-conductive fabric. Leśnikowski and Kubiak [ 20 ] studied the changes in the characteristic impedance of selected types of textile signal lines during mechanical loads. Leśnikowski [ 21 ] also investigated the influence of bending and abrasion of lines on their transmission properties.…”

Effect of Cyclical Bending and Rubbing on the Characteristic Impedance of Textile Signal Lines

“…These tests consisted of stretching the tested lines with a specified force and measuring the impedance profile after this stretching. As a result of the research, they [24] found that the tensile forces reduced the characteristic impedance of the line. They also found that the lines made of fabrics with a satin weave had the smallest impedance change under the influence of force loading.…”

“…Nevertheless, these are very important issues because such lines should work properly not only in laboratory conditions but also in regularly used smart textiles. Lesnikowski and Kubiak [24] studied the changes in the characteristic impedance of selected types of TSLs during mechanical loading. These tests consisted of stretching the tested lines with a specified force and measuring the impedance profile after this stretching.…”