System and method for detecting a rapid leak from a tire
First Claim
1. A method of detecting a rapid leak of gas contained in an automobile tire based on periodic measurements of a pressure Pa and a temperature Ta of the gas, the method comprising:
- determining a reference pressure Pcref;
calibrating a safety threshold So as a function of the precision of a pressure sensor used to measure pressure Pa, the precision of a temperature sensor used to measure temperature Ta, and the response time of the temperature sensor over each measurement acquisition period;
calculating an alarm threshold pressure Sref from the reference pressure Pcref, wherein the alarm threshold pressure Sref is determined as a function of the safety threshold So;
calculating a temperature-compensated pressure Pc at each measurement acquisition period; and
comparing the compensated pressure Pc with the alarm threshold pressure Sref, wherein the leak is detected if the compensated pressure Pc is less than the alarm threshold pressure Sref.
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Accused Products
Abstract
A method of detecting a rapid leak of gas contained in an automobile tire based on periodic measurements of a pressure Pa and a temperature Ta of the gas. The method includes determining a reference pressure Pcref, calculating an alarm threshold pressure Sref from the reference pressure Pcref, calculating a temperature-compensated pressure Pc at each measurement acquisition period, and comparing the compensated pressure Pc with the alarm threshold pressure Sref, wherein the leak is detected if the compensated pressure Pc is less than the alarm threshold pressure Sref.
8 Citations
17 Claims
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1. A method of detecting a rapid leak of gas contained in an automobile tire based on periodic measurements of a pressure Pa and a temperature Ta of the gas, the method comprising:
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determining a reference pressure Pcref; calibrating a safety threshold So as a function of the precision of a pressure sensor used to measure pressure Pa, the precision of a temperature sensor used to measure temperature Ta, and the response time of the temperature sensor over each measurement acquisition period; calculating an alarm threshold pressure Sref from the reference pressure Pcref, wherein the alarm threshold pressure Sref is determined as a function of the safety threshold So; calculating a temperature-compensated pressure Pc at each measurement acquisition period; and comparing the compensated pressure Pc with the alarm threshold pressure Sref, wherein the leak is detected if the compensated pressure Pc is less than the alarm threshold pressure Sref. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for detecting a rapid leak of gas contained in an automobile tire based on periodic measurements of a pressure Pa and a temperature Ta of the gas, the system comprising:
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a tire pressure monitoring system configured to transmit temperature information and pressure information; and a leak detection computing system configured to; calibrate a safety threshold So as a function of the precision of a pressure sensor used to measure pressure Pa, the precision of a temperature sensor used to measure temperature Ta, and the response time of the temperature sensor over each measurement acciuisition period; receive the temperature information and pressure information; determine a reference pressure Pcref and calculate an alarm threshold pressure Sref from the reference pressure Pcref, wherein the alarm threshold pressure Sref is determined as a function of the safety threshold, calculate a temperature-compensated pressure Pc at each measurement acquisition period, and compare the compensated pressure Pc with the alarm threshold pressure Sref, wherein the leak is detected if the compensated pressure Pc is less than the alarm threshold pressure Sref. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A program product for detecting a rapid leak of gas contained in an automobile tire based on periodic measurements of a pressure Pa and a temperature Ta of the gas, comprising machine-readable program code for causing, when executed, one or more machines to perform the following method steps, the method comprising:
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determining a reference pressure; calibrating a safety threshold as a functions of the precision of a pressure sensor used to measure pressure Pa, the precision of a temperature sensor used to measure temperature Ta, and the response time of the temperature sensor over each measurement acquisition period; calculating an alarm threshold pressure from the reference pressure Pcref, wherein the alarm threshold pressure is determined as a function of the safety threshold; calculating a temperature-compensated pressure at each measurement acquisition period; and comparing the temperature-compensated pressure with the alarm threshold pressure, wherein the leak is detected if the temperature-compensated pressure is less than the alarm threshold pressure. - View Dependent Claims (14, 15, 16, 17)
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Specification