Sensor device and method for operating a sensor device
AssigneeE+E Elektronik Ges.M.B.H.
InventorAlbin Haider
Life of this patent
Estimating the term…
Abstract
A sensor device includes at least one sensor, a digital signal processor and an amplifier. The at least one sensor is configured to measure a variable physical quantity and provide a raw sensor signal at an output of the at least one sensor. The digital signal processor is configured to preprocess the raw sensor signal output by the at least one sensor into a sensor signal and to further process the sensor signal into a pulse-width-modulated output signal having a duty cycle that is dependent on the measured quantity using a plurality of device-specific correction parameters stored in a memory to convert the sensor signal into the pulse-width modulated output signal. The amplifier is configured to convert the pulse-width modulated output signal into an analog voltage or current signal.
Claims15
A sensor device comprising:
- at least one sensor configured to measure a variable physical quantity and provide a raw sensor signal at an output of the at least one sensor;
- a digital signal processor configured to preprocess the raw sensor signal output by the at least one sensor into a sensor signal and to further process the sensor signal into a pulse-width-modulated output signal having a duty cycle that is dependent on the measured quantity using a plurality of device-specific correction parameters stored in a memory to convert the sensor signal into the pulse-width modulated output signal;
- and
- an amplifier configured to convert the pulse-width modulated output signal into an analog voltage or current signal.
A method for operating a sensor device in a measurement mode and in a calibration mode, the method comprising:
- operating the sensor device in the measurement mode including the steps of:
- measuring, by at least one sensor, a variable physical quantity and providing, by the at least one sensor at an output of the at least one sensor, a raw sensor signal,
- preprocessing, by a digital signal processor, the raw sensor signal output by the at least one sensor into a sensor signal and converting, by the digital signal processor, the sensor signal into a pulse-width-modulated output signal having a duty cycle that is dependent on the measured quantity, and
- converting, by an amplifier, the pulse-width modulated output signal into an analog voltage or current signal;
- and
- operating the sensor device in the calibration mode preceding the measurement mode including the step of storing a plurality of device-specific correction parameters in a memory,
- wherein the device-specific correction parameters are used by the signal processor in the measurement mode to convert the sensor signal into the pulse-width modulated output signal.
Dependencies are inferred from the claim text.