Method and device for monitoring a physical variable on a wheel of a vehicle
First Claim
1. A method for monitoring a physical variable of a wheel fitted on a vehicle during travel, which comprises the steps of:
- measuring the physical variable at the wheel;
transmitting a radio message containing information about the physical variable;
receiving and processing the radio message on the vehicle;
determining and storing a first comparative intensity distribution of a receiving strength of radio signals at predefined deflection angles between a longitudinal axis of the vehicle and a plane of the wheel;
recording a random sample of an actual intensity distribution of the receiving strength of further radio signals during operation by repeated transmission and receiving of a plurality of the further radio messages;
using a statistical test to determine whether the random sample could have been taken from the first comparative intensity distribution and a test result being used to decide whether or not the wheel has achieved a predefined deflection angle; and
concluding from the predefined deflection angle determined by the statistical test, whether the wheel is a steered wheel or an unsteered wheel.
2 Assignments
0 Petitions
Accused Products
Abstract
A method for monitoring a physical variable, in particular the tire pressure, of a wheel fitted on a vehicle is performed when the vehicle travels. The physical variable is measured at the wheel and transmitted to a receiver on the vehicle. An evaluation/storage unit determines and stores a predefined first comparative intensity distribution of the receiving strength of the radio signals at a specified deflection angle between the longitudinal axis of the vehicle and the plane of the wheel and a random sample for the actual intensity distribution of the receiving strength of the radio signals being recorded by the repeated transmission and receiving of a plurality of radio messages.
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Citations
24 Claims
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1. A method for monitoring a physical variable of a wheel fitted on a vehicle during travel, which comprises the steps of:
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measuring the physical variable at the wheel; transmitting a radio message containing information about the physical variable; receiving and processing the radio message on the vehicle; determining and storing a first comparative intensity distribution of a receiving strength of radio signals at predefined deflection angles between a longitudinal axis of the vehicle and a plane of the wheel; recording a random sample of an actual intensity distribution of the receiving strength of further radio signals during operation by repeated transmission and receiving of a plurality of the further radio messages; using a statistical test to determine whether the random sample could have been taken from the first comparative intensity distribution and a test result being used to decide whether or not the wheel has achieved a predefined deflection angle; and concluding from the predefined deflection angle determined by the statistical test, whether the wheel is a steered wheel or an unsteered wheel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system for monitoring a physical variable of a wheel fitted on a vehicle, during travel, the system comprising:
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a sensor; a transmitter disposed on the wheel for transmitting a radio message; a receiver with an intensity detector communicating with said transmitter, said receiver determining a signal strength of a received radio message; and an evaluation/storage unit connected to said receiver, said evaluation/storage unit having; a distribution memory for storing at least one intensity distribution; an intensity memory for storing measured intensity values; a computation unit connected to said distribution memory and said intensity memory, said computation unit configured for data transfer and standard statistical methods; and a comparison device connected to and operating together with said computation unit, said comparison device configured for verifying whether a random sample corresponds to a given distribution function and for determining from the verification step whether the wheel has achieved a predefined deflection angle, it being possible to derive from the predefined deflection angle determined by the verification step whether the wheel is a steered wheel or an unsteered wheel. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification