Method and apparatus for tire pressure monitoring
First Claim
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1. A method for detecting changes in pressure, using relatively little power, comprising:
- obtaining a first measurement of pressure from a pressure sensor at a first interval;
obtaining a plurality of approximate measurements of pressure from the pressure sensor at a second interval; and
providing a notification when a predetermined change in pressure measurements is detected between any of the measurements.
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Abstract
A method for monitoring pressure is described herein. The method includes the steps of performing an accurate measurement of pressure and performing an approximate measurement of pressure. Then, providing a notification signal if a difference between the approximate measurement and the accurate measurement is greater than a predetermined value. An apparatus for performing the method is also disclosed.
42 Citations
26 Claims
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1. A method for detecting changes in pressure, using relatively little power, comprising:
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obtaining a first measurement of pressure from a pressure sensor at a first interval; obtaining a plurality of approximate measurements of pressure from the pressure sensor at a second interval; and providing a notification when a predetermined change in pressure measurements is detected between any of the measurements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus for monitoring pressure, using relatively little power, comprising:
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a pressure sensor capable of measuring both a reference capacitance and a pressure capacitance; a processor coupled to the pressure sensor; and
,a memory coupled to the processor, the memory configured to cause the processor to; perform an accurate measurement of pressure using the pressure sensor during a first interval; perform a plurality of approximate measurements of pressure using the pressure sensor during a second interval; and
,provide a notification when a predetermined change between the approximate measurement and the accurate measurement is detected. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A processor readable medium having instructions stored thereon that, when executed by the processor, causes the processor to performs a method for monitoring pressure comprising:
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performing an accurate measurement of pressure by obtaining a reference pressure measurement;
obtaining an actual pressure measurement;
comparing the reference pressure measurement based upon the reference pressure measurement whereby the first pressure measurement is obtained at a first interval determined by the processor;performing a plurality of approximate measurements of pressure at a second interval as determined by the processor; and
,providing notification if a predetermined change is detected between any of the measurements.
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Specification