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US 12,674,788 B2Granted
Gas sensor dynamic environmental compensation using auto-calibration method
AssigneeHoneywell International Inc.
InventorsRaghavendra Muniraju, Nikhil Gupta
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Abstract
A gas sensor system and a method of operating the gas sensor system can include a group of sensors and a microcontroller that can receive sensor measurements from the group of sensors. Feedback from the group of sensors can generate a sensor offset and a pulse width modulation (PWM) demodulator can be varied to reduce the sensor offset to null and provide sensor-to-sensor variations, which are independent of error in the sensor measurements.
Claims15
A gas sensor system, comprising:
- an electrochemical sensor configured to generate output data, wherein the output data is indicative of a concentration of a gay;
- a plurality of sensors;
- a microcontroller configured to receive sensor measurements from the plurality of sensors wherein the microcontroller is configured to generate a pulse width modulated (PWM) signal based on the sensor measurements;
- and
- a pulse width modulation (PWM) demodulator configured to generate a compensation signal based on the PWM signal, wherein the compensation signal is utilized to reduce a sensor offset in the output data to null and provide sensor-to-sensor variations, which are independent of error in the sensor measurements.
2 more elements
A method of operating a gas sensor system, the method comprising:
- receiving, by a microcontroller, an output data indicative of a concentration of a gas;
- receiving, by the microcontroller, sensor measurements from a plurality of sensors;
- generating by the microcontroller, a pulse width modulated (PWM) signal based on the sensor measurements;
- and
- generating a compensation signal based on the PWM signal, wherein the compensation signal is utilized to reduce the sensor offset to null and provide sensor-to-sensor variations independent of error in the sensor measurements.
2 more elements
A gas sensor system, comprising:
- at least one processor and a memory storing instructions to cause the at least one processor to perform:
- receiving an output data indicative of a concentration of a gas:
- receiving sensor measurements from a plurality of sensors;
- generating a pulse width modulated (PWM) signal based on the sensor measurements;
- and
- generating a compensation signal based on the PWM signal, wherein the compensation signal is utilized to reduce the sensor offset to null and provide sensor-to-sensor variations independent of error in the sensor measurements.
3 more elements
Dependencies are inferred from the claim text.