Calibrated thermal sensing system
First Claim
1. A warming article comprising a heating element and a sensing circuit, wherein the sensing circuit comprises a first sensor element being a temperature dependent variable resistor, a second sensor element being a temperature independent variable resistor, and a third sensor element being a temperature independent variable resistor, an wherein the first sensor element is linear and flexible.
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Abstract
The invention relates to a warming article comprising a heating element and a sensing system, wherein the sensing system comprises a first sensor element being a temperature dependent variable resistor and a second sensor element being a variable resistor, and wherein the first sensor element is linear and flexible and the second sensor element is used to adjust the total sensor resistance to a fixed value at a particular temperature.
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Citations
24 Claims
- 1. A warming article comprising a heating element and a sensing circuit, wherein the sensing circuit comprises a first sensor element being a temperature dependent variable resistor, a second sensor element being a temperature independent variable resistor, and a third sensor element being a temperature independent variable resistor, an wherein the first sensor element is linear and flexible.
- 11. A warming article comprising a heating element and a sensing system, wherein the sensing system comprises a first sensor element being a temperature dependent variable resistor and a calibration element, wherein the calibration element is encoded with the resistance of the first sensor element at a measured baseline temperature, and wherein the first sensor element is linear and flexible.
- 15. A warming article comprising a heating element and a sensing system, wherein the sensing system comprises a first sensor element being a temperature dependent variable resistor and a calibration element being an independent temperature sensor, wherein the independent temperature sensor senses the ambient temperature surrounding the warming article, and wherein the first sensor element is linear and flexible.
- 21. A warming article comprising a heating element and a sensing system, wherein the sensing system comprises a first sensor element being a temperature dependent variable resistor and a calibration element, wherein the calibration element is encoded with a user input of room temperature, and wherein the first sensor element is linear and flexible.
Specification