Monitoring a tire by acceleration measurement
First Claim
1. A process for the in-service monitoring of the condition of a tire of a wheel riding on a ground, the tire having a tread, the process comprising the steps of:
- providing in the tire, near the tread, a miniature sensor for sensing radial acceleration;
monitoring the variations in the measurement from the sensor;
detecting a decrease in the radial acceleration, said decrease corresponding to a zone of the tread in contact with the ground; and
measuring a period of low radial acceleration phases and a fraction of this period during which the radial acceleration is low, said fraction within each period being related to a length of said zone where the tread is in contact with the ground, and thereby to the condition of the tire.
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Accused Products
Abstract
The invention relates to the in-service monitoring of the condition of a tire of a wheel of a vehicle. To this end it proposes a process and, in particular, a device comprising: a sensor (4) mounted on the wheel, coupling means (BVF2, BRF2) for transmitting to the vehicle indications derived from this sensor (4), and electrical energizing means (BVF1, BRF1). According to the invention, the sensor (4) is a miniature acceleration-sensitive sensor implanted in the tread of the tire or in the vicinity of the tread. The coupling means, mounted on the wheel, then transmit indications relating to the measurements made at the moment at which the tread is in contact with the ground.
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Citations
8 Claims
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1. A process for the in-service monitoring of the condition of a tire of a wheel riding on a ground, the tire having a tread, the process comprising the steps of:
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providing in the tire, near the tread, a miniature sensor for sensing radial acceleration;
monitoring the variations in the measurement from the sensor;
detecting a decrease in the radial acceleration, said decrease corresponding to a zone of the tread in contact with the ground; and
measuring a period of low radial acceleration phases and a fraction of this period during which the radial acceleration is low, said fraction within each period being related to a length of said zone where the tread is in contact with the ground, and thereby to the condition of the tire. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification