Devices and method for calibrating measured values
AssigneeWAGO Verwaltungsgesellschaft mbH
InventorsMatthias Kruehler, Thorsten Lindner
Life of this patent
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Abstract
A device, which includes an input, configured to read in an analog signal, an analog/digital converter, configured to convert the analog signal into a digital value, and a processor, configured to determine a digital measured value. The processor is further configured to derive a calibrated digital value from the digital value with the aid of a linear calibration function and to derive the digital measured value from the calibrated digital value with the aid of a nonlinear measurement function. The processor modifies the linear calibration function in response to a calibration signal, based on an algorithm, which is based on the nonlinear measurement function, and a number of predefined comparison measured values.
Claims12
A device comprising:
- an input configured to read an analog signal;
- an analog/digital converter configured to convert the analog signal into a digital value;
- and
- a processor configured to determine a digital measured value,
- wherein the processor is configured to derive a calibrated digital value from the digital value with an aid of a linear calibration function,
- wherein the processor is configured to derive the digital measured value from the calibrated digital value with an aid of a nonlinear measurement function, and
- wherein the processor is configured to modify the linear calibration function in response to a calibration signal, based on an algorithm, which is based on the nonlinear measurement function and a number of predefined comparison measured values.
A device comprising:
- an input circuit for a sensor or a temperature sensor to output an analog voltage;
- an analog/digital converter to input the analog voltage and to output a digital value;
- a first function module for a first calibration of the digital value depending on the analog/digital converter based on a first calibration function for outputting a first calibration value;
- a second function module for an application-dependent second calibration of the first calibrated value, based on a second calibration function for outputting a second calibrated value;
- a third function module for inputting the second calibrated value and for outputting a physical value of the sensor based on the second calibrated value;
- a fourth function module for comparing the physical value of the sensor with a predefinable setpoint value and outputting a comparison result;
- and
- a correction module for modifying the application-specific second calibration function based on the comparison result.
A method for configuring measuring electronics connected downstream from a sensor, the method comprising:
- deriving a calibrated value from a sensor signal with an aid of a linear calibration function;
- deriving a measured value from the calibrated value with an aid of a nonlinear measurement function;
- and
- modifying the linear calibration function based on a first sensor signal value and a second sensor signal value, which correspond to known measured values.
Dependencies are inferred from the claim text.