Method for determining a tire position in a tire pressure measurement system
First Claim
1. A method for determining a tire position in a tire pressure measurement system, comprising:
- receiving data packets comprising pressure measurement data, said data packets transmitted by a pressure sensing unit mounted on a tire;
evaluating a repetition rate of the received data packets;
extracting a pressure variation out of the received data packets;
switching to a first mode of operation if the pressure variation indicates a pressure drop and the repetition rate exceeds a threshold value; and
switching to a second mode of operation, if the pressure variation indicates a pressure increase and the repetition rate exceeds a threshold value, wherein the second mode of operation comprises;
waiting for a location information, said information determining the tire position.
2 Assignments
0 Petitions
Accused Products
Abstract
In a method for transmitting data, the step of transmitting the data representing a measured pressure or pressure variation is repeated with a first repetition rate if no pressure variation has been detected or repeated with a second repetition rate if a specific pressure variation has been detected. The second repetition rate is higher than the first repetition rate. The different repetition frequencies can be used in a method for determining a tire position in a tire pressure measurement system to switch between a first mode of operation and a second mode of operation. The method for determining a tire position evaluates the repetition rate between the received data packets of transmitted data and extracts a pressure variation out of the received data packets.
6 Citations
14 Claims
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1. A method for determining a tire position in a tire pressure measurement system, comprising:
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receiving data packets comprising pressure measurement data, said data packets transmitted by a pressure sensing unit mounted on a tire; evaluating a repetition rate of the received data packets; extracting a pressure variation out of the received data packets; switching to a first mode of operation if the pressure variation indicates a pressure drop and the repetition rate exceeds a threshold value; and switching to a second mode of operation, if the pressure variation indicates a pressure increase and the repetition rate exceeds a threshold value, wherein the second mode of operation comprises; waiting for a location information, said information determining the tire position. - View Dependent Claims (2)
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3. A pressure sensing unit, comprising:
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a pressure sensing device for providing a first digital signal derived by a pressure; a switching device coupled with their input terminal to the pressure sensing device and adapted for providing a selection signal derived by a comparison of a digital value with a first threshold value, the digital value derived by the first digital signal at the input terminal; and a transmission device coupled to the switching device and adapted for transmitting a signal comprising data representing a pressure or a pressure variation with a first or a second repetition rate depending on the selection signal, wherein the pressure sensing device comprises; an oscillator, which is selectively coupled to a reference capacitor or to a pressure capacitor for adjusting a resonance frequency of the oscillator. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification