Connection Points of Woven Electrodes and its Durability

Abstract

Existing nocturnal enuresis alarm systems are mostly rigid and inflexible, therefore they are not comfortable enough to use. To improve comfort conditions of
the system, modular humidity sensor should be replaced by textile sensor that can be designed of conductive and insulating (non-conductive) yarns. In order to
evaluate suitability of woven structures for sensors, another kind of samples was prepared as well where instead of conductive warp yarns conductive seams
were sewn. In the samples fabrication horizontal and vertical contacts of sensor electrodes should be interconnected. In the paper fabrication process woven
moisture sensor was described as well as durability of different connections (soldered and knot) of sensor electrodes vertical and horizontal contacts were
tested. Contact tightness was evaluated with conductivity (in siemens) between vertical and horizontal contacts of electrodes. To compare durability of knot
and soldered connections, wash test was performed using standard ISO 6330:2012. Electrical resistance was measured in samples before washing and after
each washing cycle (in total 10 wash cycles were done). After test it was concluded that woven electrotextile structure improves durability of both soldered and
knot conductive yarn connections that enhances sensorial feeling in textile as well. This example was developed using textile moisture sensors, however such
kind of application can be used for other textile circuits as well where a number of electrical interconnections are realized.