Self-validating sensors
First Claim
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1. A method of compensating for variations in a transfer function of a sensor, comprising:
- identifying a desired transfer function for the sensor;
determining an actual transfer function for the sensor;
receiving a measurement produced by the sensor;
modifying the measurement based on the desired and actual transfer functions to produce a modified measurement; and
providing the modified measurement as a measurement value for the sensor.
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Abstract
A sensor for provides a measurement and information about the validity of the measurement. The sensor includes a transducer for generating a data signal related to the value of a variable and a transmitter for receiving the data signal and generating output signals. The transmitter generates a first output signal related to the value of the variable. The transmitter also generates a second output signal based on a dynamic uncertainty analysis of the first output signal.
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Citations
28 Claims
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1. A method of compensating for variations in a transfer function of a sensor, comprising:
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identifying a desired transfer function for the sensor; determining an actual transfer function for the sensor; receiving a measurement produced by the sensor; modifying the measurement based on the desired and actual transfer functions to produce a modified measurement; and providing the modified measurement as a measurement value for the sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of compensating for variations in a transfer function of a sensor, comprising:
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identifying a desired transfer function for the sensor; determining an actual transfer function for the sensor; receiving a measurement produced by the sensor; modifying the measurement based on an inverse of the actual transfer function to produce a compensated measurement; modifying the compensated measurement based on the desired transfer function to produce a modified measurement; providing the modified measurement as a measurement value for the sensor; generating a first uncertainty measure for the compensated measurement; generating a second uncertainty measure for the desired transfer function; and combining the first and second uncertainty measures to produce an uncertainty measure for the measurement value. - View Dependent Claims (14, 15, 16)
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17. A sensor for providing a measurement value, the sensor comprising:
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a transducer configured to generate a measurement, and a transmitter configured to; identify a desired transfer function for the transducer; determine an actual transfer function for the transducer; receive the measurement generated by the transducer; modify the measurement based on the desired and actual transfer functions to produce a modified measurement; and provide the modified measurement as a measurement value for the sensor. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification