Method and system for calculating electrical characteristics of an electric heater
AssigneeWillow Electric Manufacturing Company
InventorsMatthew Yender, Stanton H. Breitlow
Life of this patent
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Abstract
A method of controlling temperature of a heater including a resistive heating element includes measuring a voltage count and a current count based on data from an analog-digital converter (ADC) circuit of a sensor circuit, where the sensor circuit is electrically coupled to the heater. The method includes selecting one or more dynamic gain levels of the ADC from among a plurality of dynamic gain levels based on a shift gain correlation, determining a resistance of the resistive heating element based on the voltage count, the current count, and the one or more dynamic gain levels, and controlling power to the heater based on the resistance.
Claims18
A method of controlling temperature of a heater including a resistive heating element, the method comprising:
- measuring, by a processor, a voltage count and a current count based on data from an analog-digital converter (ADC) circuit of a sensor circuit, wherein the sensor circuit is electrically coupled to the heater;
- selecting, by the processor, a plurality of dynamic gain levels of the ADC based on a shift gain correlation, wherein the plurality of dynamic gain levels include a voltage dynamic gain level and a current dynamic gain level;
- determining a voltage value based on a ratio of the voltage count and the voltage dynamic gain level;
- determining a current value based on the ratio of the current count and the current dynamic gain level;
- determining a resistance of the resistive heating element based on the voltage value and the current value;
- and
- controlling, by the processor a control system to power the heater based on the resistance.
A system for controlling temperature of a heater including a resistive heating element, the system comprising:
- one or more processors configured to execute instructions stored in a nontransitory computer-readable medium, wherein the instructions comprise:
- obtaining data from an analog-digital converter (ADC) circuit of a sensor circuit that is electrically coupled to a heater;
- measuring a voltage count and a current count based on the data;
- selecting a voltage dynamic gain level and a current dynamic gain level of the ADC from among a plurality of dynamic gain levels based on a shift gain correlation;
- determining a voltage value based on a ratio of the voltage count and the voltage dynamic gain level;
- determining a current value based on the ratio of the current count and the current dynamic gain level;
- determining a resistance of the resistive heating element based on the voltage value and the current value;
- and
- controlling by the one or more processors a control system configured to supply power to the heater based on the resistance.
Dependencies are inferred from the claim text.