Circuit integrity detection system for detecting the integrity of a sensing wire in electrically heated textiles

摘要

A circuit integrity detection system for use in detecting the integrity of sensing wire in a heating pad wherein the integrity of the sensing wire is checking the inputs from a first and second A/D converter connected to opposite ends of the sensing wire.

主权项

1. An electrically heated textile comprising:
a heating element, wherein a first signal is generated through the heating element at a first frequency; a sensing wire for detecting a hotspot created by the heating element; a layer having a negative temperature coefficient (NTC) positioned between the heating element and the sensing wire, wherein the sensing layer is wrapped about the NTC layer; and a means for detecting the integrity of a sensing wire including a first A/D converter connected to a first end of the sensing wire; a second A/D converter connected to a second end of the sensing wire; and a signal detector for detecting the signal from the first and second A/D converters.