Smart temperature sensing device
First Claim
1. A temperature sensing device, comprising:
- a sensor unit including a sensor operable to sense a temperature; and
a memory integral to the sensor unit, wherein the memory contains nonlinear calibration data which characterize the sensor and wherein the nonlinear calibration data is independent of conversion circuitry which utilizes the nonlinear calibration data in converting a signal representative of the sensed temperature into an output indicative of the temperature.
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Abstract
A smart temperature sensing device 10 includes a sensor 16 and a memory 25 on a sensor unit 14. The memory contains a plurality of custom nonlinear calibration coefficients which uniquely characterize the sensor 16. A temperature system includes the smart temperature sensing device 10 and a FSAU 12 having a processor 28 which downloads the calibration coefficients and utilizes them in converting electrical signals from the sensor 16 into temperature values that represent the temperature at the sensor 16. A method of calibrating a sensor 16 includes measuring an output signal of the sensor 16 over a temperature range, thereby obtaining a plurality of paired data points. The paired data points are used in a curve-fitting algorithm to obtain coefficients to a polynomial that characterizes the nonlinear temperature-voltage relationship of the sensor 16. The coefficients are stored within the memory 25 until downloaded by the processor 28 for use in signal conversion.
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Citations
21 Claims
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1. A temperature sensing device, comprising:
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a sensor unit including a sensor operable to sense a temperature; and a memory integral to the sensor unit, wherein the memory contains nonlinear calibration data which characterize the sensor and wherein the nonlinear calibration data is independent of conversion circuitry which utilizes the nonlinear calibration data in converting a signal representative of the sensed temperature into an output indicative of the temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A smart temperature sensor system, comprising:
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a sensor on a sensor unit, operable to sense a temperature; a memory on the sensor unit, wherein the memory contains nonlinear calibration data which characterizes the sensor and wherein the nonlinear calibration data is independent of a processor; and the processor remote from the sensor unit and electrical communication with the sensor and the memory, wherein the processor receives the nonlinear calibration data from the memory and an electrical signal from the sensor, and wherein the processor utilizes the nonlinear calibration data to convert the electrical signal into a value that represents the temperature at the sensor. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification