METHOD AND DEVICE FOR IDENTIFYING THE POSITION OF A WHEEL OF A VEHICLE
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Accused Products
Abstract
A method of identifying a position of a wheel of a vehicle includes: providing, in at least one wheel of the vehicle, a device with at least one magnetic sensor with a maximum sensitivity axis; starting up the vehicle; measuring at terminals of each magnetic sensor a signal representative of magnetic flux time variations during rotation of the wheel; determining a characteristic quantity of the signal; comparing the characteristic quantity to a given threshold; and determining, according to a comparison result, a front or rear location of the wheel.
10 Citations
48 Claims
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1-18. -18. (canceled)
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19. A method of identifying a position of a wheel of a vehicle, comprising steps of:
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providing, in a first wheel of the vehicle, a first device with a magnetic sensor with a maximum sensitivity axis; measuring at terminals of the magnetic sensor of the first device a first signal representative of time variations of a magnetic flux during rotation of the first wheel while the vehicle is in operation; determining a characteristic quantity of the first signal; comparing the characteristic quantity to a given threshold to obtain a comparison result; and determining, according to the comparison result, whether the first wheel is in a front location or a rear location. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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47. A system for monitoring wheels of a vehicle, comprising:
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in the vehicle, a central processing unit with a receiver and a processor; and in each wheel, a device including; a magnetic sensor with a maximum sensitivity axis, a signal measurement circuit that measures, at terminals of the magnetic sensor, a signal representative of time variations of a magnetic flux time during rotation of the wheel, a computation unit, and a transmitter, wherein each magnetic sensor has its maximum sensitivity axis arranged parallel to an axis of rotation of a corresponding wheel thereof, wherein each computation unit calculates a characteristic quantity that is a function of an energy of a signal measured at terminals of a corresponding magnetic sensor thereof, wherein the processor of the central processing unit determines, from the characteristic quantities transmitted by the devices of the wheels of the vehicle, a front location or a rear location of each device.
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48. A system for monitoring the wheels of a vehicle comprising:
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in the vehicle, a central processing unit with a receiver and a processing unit; and in each wheel, a device including; two magnetic sensors, each with maximum sensitivity axes, a signal measuring circuit that measures, at terminals of each of magnetic sensor, a signal representative of magnetic flux time variations during rotation of the wheel, a computation unit, and a transmitter, wherein, for each device, the two magnetic sensors of the device are positioned at different azimuths and similar positions relative to an axis of rotation of a corresponding wheel in which the device is included, wherein, for each device, the computation unit of the device is able to calculate a self-correlation function of signals measured at the terminals of the two magnetic sensors of the device, and wherein the processing unit of the central processing unit is able to determine, from the self-correlation functions transmitted by the devices of the wheels of the vehicle, a front or rear and left or right locations of each of the devices of the vehicle.
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Specification