Method of processing signals in a system for monitoring the tires of a vehicle during travel
First Claim
1. A method of processing signals in a system for monitoring tires of a vehicle during travel, said system having, for each tire, at least one measurement of the inflation pressure of said tire, comprising:
- measuring, at substantially the same time, the inflation pressure of a first tire and of a second tire;
calculating the difference in the inflation pressures of the first and second tires;
recording periodically the calculated pressure difference and retaining the last N values covering a total time T in order to obtain a series of values;
effectuating a trend analysis of said series of values; and
giving off an alarm when said trend analysis satisfies a predetermined relationship.
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Abstract
A method of processing signals in a system for monitoring tires of a vehi during travel, the system providing for each tire at least one measurement which is characteristic of the condition of inflation of the tire, in which:
based on measurements carried out substantially at the same time, the measurement characteristic of one tire is compared with the same measurement of at least one other tire,
the result of this comparison is periodically recorded so as to obtain a series of values,
an alarm is given off when the variation in time of this series of values satisfies a predetermined relationship.
49 Citations
23 Claims
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1. A method of processing signals in a system for monitoring tires of a vehicle during travel, said system having, for each tire, at least one measurement of the inflation pressure of said tire, comprising:
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measuring, at substantially the same time, the inflation pressure of a first tire and of a second tire; calculating the difference in the inflation pressures of the first and second tires; recording periodically the calculated pressure difference and retaining the last N values covering a total time T in order to obtain a series of values; effectuating a trend analysis of said series of values; and giving off an alarm when said trend analysis satisfies a predetermined relationship. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of processing signals in a system for the monitoring of tires of a vehicle during travel, said system delivering for each tire at least one measurement of the inflation pressure of said tire, comprising:
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measuring and periodically recording the inflation pressure for at least one tire; retaining the last N values covering a total time T in order to obtain a series of values; effectuating a trend analysis of said series of values in order to give off an alarm if the trend observed is greater than a given value; after an alarm has been triggered, calculating an estimate, based on, the extent to which the trend is greater than the given value of the time that it will take in order for the measured inflation pressure of the tire to drop below a given critical threshold S0 ; transmitting this estimate to the driver of the vehicle.
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18. A method of processing signals in a system for monitoring tires of a vehicle during travel, said system having, for each tire, at least one measurement of the inflation pressure of said tire, in which:
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based on measurements carried out substantially at the same time, the inflation pressure of one tire is compared with the inflation pressure of at least one other tire; this comparison of inflation pressures is periodically recorded in order to obtain a series of values; an alarm is given off when a variation in time of said series of values exceeds, in absolute value, a given threshold S; said series of values being established by retaining the last N recorded values covering a total time T; establishing a linear regression of said N recorded values; and calculating the slope α
of the linear regression line and triggering the alarm if the slope α
is greater, in absolute value, than the ratio between the threshold S and the total time T. - View Dependent Claims (19, 20, 21, 22, 23)
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Specification