METHOD AND DEVICE FOR IDENTIFYING A TEMPERATURE SENSOR CONNECTED TO A CONTROL UNIT
First Claim
1. A method for identifying a temperature sensor of a heating device, wherein said temperature sensor is positioned so as to be directly heated by said heating device, wherein said temperature sensor is connected to a control unit and evaluated by said control unit, comprising the steps of:
- measuring a resistance value of said connected temperature sensor in response to connecting said control unit to an operating voltage;
comparing said resistance value with at least one preset limit value, wherein said preset limit value characterizes at least two different groups of said temperature sensors with respect to said resistance value of said temperature sensors;
classifying said temperature sensor as belonging to a first group of temperature sensors if said resistance value exceeds said limit value andclassifying said temperature sensor as belonging to a second group of temperature sensor is said resistance value is below said limit value; and
controlling and evaluating said temperature sensor by said control unit by using calibration data to calibrate said temperature sensor using said resistance value according to one of said groups of said temperature sensors.
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Accused Products
Abstract
A controller of a hob is connected to a temperature sensor of a radiation based heating element. In principle, two different groups of temperature sensors can be used, whose resistance values differ by approximately a factor of three. When the hob is first used, the resistance of the temperature sensor is measured at room temperature and is classified in one of the two groups of temperature sensors on the basis of a limit value between the two typical temperature profiles of the groups of temperature sensors. On the basis of this, calibration of the controller is carried out for the purpose of adjusting to the established group to which the temperature sensor belongs.
17 Citations
20 Claims
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1. A method for identifying a temperature sensor of a heating device, wherein said temperature sensor is positioned so as to be directly heated by said heating device, wherein said temperature sensor is connected to a control unit and evaluated by said control unit, comprising the steps of:
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measuring a resistance value of said connected temperature sensor in response to connecting said control unit to an operating voltage; comparing said resistance value with at least one preset limit value, wherein said preset limit value characterizes at least two different groups of said temperature sensors with respect to said resistance value of said temperature sensors; classifying said temperature sensor as belonging to a first group of temperature sensors if said resistance value exceeds said limit value and classifying said temperature sensor as belonging to a second group of temperature sensor is said resistance value is below said limit value; and controlling and evaluating said temperature sensor by said control unit by using calibration data to calibrate said temperature sensor using said resistance value according to one of said groups of said temperature sensors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A device for identifying a sensor in a radiant heater, comprising:
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a glass ceramic hob having a top and a bottom surface; a support positioned in a parallel manner below said bottom surface of said glass ceramic hob, said support having a top and bottom surface; a heating conductor position on said support, said heating conduct capable of generating heat upon application of an operating voltage; a temperature sensor positioned over said heating conductor, said temperature sensor positioned between said heating conductor and said glass ceramic hob, said temperature sensor having a resistance varying with respect to temperature; a switch for providing said operating voltage to said heating conductor based on a control input; and a control unit providing said control input, said control unit configured to measure resistance of the temperature sensor, said control unit configured to measure a first resistance of said temperature sensor prior to providing said control input to said switch providing said operating voltage to said heating conductor and classifying said temperature sensor as belonging to a first group of temperature sensors if said first resistance value exceeds a limit value and classifying said temperature sensor as belonging to a second group of temperature sensors if said first resistance value is less than said limit value. - View Dependent Claims (17, 18, 19)
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20. A system for identifying a sensor in a hob, comprising:
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a temperature sensor positioned over a heating conductor in said hob, said temperature sensor positioned between said heating conductor and a glass ceramic surface of said hob, said temperature sensor being either a tungsten based temperature sensor in a sealed envelope or a platinum based temperature sensor, said temperature sensor having a resistance value when measured at ambient room temperature, wherein said platinum based temperature sensor has a corresponding resistance above a threshold and said tungsten based temperature sensor has a corresponding resistance value below said threshold; and a control unit configured to measure the resistance of the temperature sensor prior to directing an operating voltage be applied to said heating conductor, said control unit classifying said temperature sensor as said tungsten based temperature sensor if said first resistance is below said threshold and classifying said temperature sensor as a platinum sensor is said first resistance is above said threshold.
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Specification