METHOD AND APPARATUS FOR ADJUSTING THE PRESSURE SENSOR MEASUREMENT RANGE IN A TIRE PRESSURE MONITORING SYSTEM
First Claim
1. A method of operating a tire pressure monitoring system for a vehicle comprising:
- calibrating a tire pressure sensor circuit in a first range and a second range;
generating first calibration data for the first range;
generating second calibration data for the second range;
storing the first calibration data and the second calibration data in a memory of the tire pressure sensing circuit;
generating a data signal corresponding to a pressure;
selecting the first or second calibration data in response to a range of the data signal to form a selected calibration;
calibrating the data signal with the selected calibration to form a pressure indicative signal;
transmitting the pressure indicative signal to a receiver with a range status corresponding to the selected calibration;
generating a pressure signal in response to the pressure indicative signal and the range status; and
operating the tire pressure monitoring signal with the pressure signal.
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Accused Products
Abstract
A tire pressure monitoring system (12) for a vehicle (10) has a pressure sensor circuit (16A) that includes an ECU (95), a transmitter/receiver (90), and pressure sensor (94). A method of operating a tire pressure monitoring system includes calibrating a tire pressure sensor circuit in a first range and a second range and generating a first calibration data for the first range and second calibration data for the second range. The first calibration data and the second calibration data are stored in a memory of the tire pressure sensing circuit (16A). A data signal corresponding to the pressure is generated. The first or second calibration data is generated in response to the range of the data signal to form a selected calibration. The data signal is calibrated with the selected calibration to form a pressure indicative signal. The pressure indicative signal is transmitted to a receiver (28) within the vehicle (10) with a range status corresponding to the selected calibration. A pressure signal is formed in response to the pressure indicative signal and the range status and the tire pressure monitoring system is operated with the pressure signal.
107 Citations
17 Claims
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1. A method of operating a tire pressure monitoring system for a vehicle comprising:
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calibrating a tire pressure sensor circuit in a first range and a second range;
generating first calibration data for the first range;
generating second calibration data for the second range;
storing the first calibration data and the second calibration data in a memory of the tire pressure sensing circuit;
generating a data signal corresponding to a pressure;
selecting the first or second calibration data in response to a range of the data signal to form a selected calibration;
calibrating the data signal with the selected calibration to form a pressure indicative signal;
transmitting the pressure indicative signal to a receiver with a range status corresponding to the selected calibration;
generating a pressure signal in response to the pressure indicative signal and the range status; and
operating the tire pressure monitoring signal with the pressure signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A tire pressure sensor circuit for a tire pressure monitoring system for a vehicle comprising:
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a memory having first calibration data and second calibration data corresponding to a first range and a second range;
a pressure sensor generating a data signal corresponding to a tire pressure;
a tire transmitter; and
a control unit coupled to the memory and the tire transmitter, said control unit selecting the first or second calibration data in response to a range of the data signal to form a selected calibration, calibrating the data signal with the selected calibration to form a pressure indicative signal and causing the transmitter to transmit the pressure indicative signal and a range status corresponding to the selected calibration.
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10. A method comprising:
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providing a memory in a tire pressure sensor circuit having first calibration data and second calibration data stored therein;
generating a data signal corresponding to a pressure;
determining a range of the data signal;
selecting the first or second calibration data in response to the range to form a selected calibration;
calibrating the data signal with the selected calibration to form a pressure indicative signal; and
transmitting the pressure indicative signal and the range corresponding to the selected calibration. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification