Towards Textile Thermopiles

This study deals with textile thermopiles. Textile thermopiles were realized in the form of five serial thermocouples for higher sensitivity. Textile thermopiles realized for this article were made of two types of hybrid conductive threads, materials correspond to thermocouple type T. Thermocouple junctions were realized by embroidery of X-shape and welded by thermocompression welding on a resistance welding machine. Welding was realized using the thermocompression electrode. Samples were tested at the stepped temperature profile in the range from $40^{\circ}\mathrm{C}$ to $145^{\circ}\mathrm{C}$. Results were compared with individual textile thermocouples. The sensitivity and standard deviation of test set textile thermopiles and thermocouples were calculated. It corresponds to the IEC 584 Class 2 condition.