Double-Wheel TPMS Sensor Location Using Wheel Pulse Counters
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Solution Overview
Problem
In double-wheeled vehicles, it is challenging to accurately determine the location of tire pressure sensors, particularly distinguishing between inner and outer wheels, which hinders the identification of low-pressure conditions in each tire.
Innovation Solution
A vehicle system and method that utilize wheel pulse counter values and rotational acceleration signals to determine the location of tire pressure sensors, employing a processor to differentiate between left and right wheels and inner and outer wheels by comparing wheel pulse counter values and analyzing rotational acceleration directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tire pressure sensors are mounted on double-wheeled tires, then tire pressure monitoring capability is improved, but the ability to distinguish sensor locations (inner/outer wheels) deteriorates
Solution Approach 1:
The patent introduces wheel pulse counter values and rotational acceleration signals as intermediary parameters to indirectly identify sensor locations. Instead of directly detecting sensor position, the system uses these intermediary measurements from wheel speed sensors and accelerometers to infer whether a sensor is mounted on an inner or outer wheel, thereby resolving the location identification problem in double-wheeled configurations
Solution Approach 2:
The system changes the parameters used for sensor identification from simple presence detection to multi-parameter analysis including wheel pulse counter values and rotational acceleration characteristics. By analyzing changes in these parameters during vehicle operation, the system can distinguish between inner and outer wheel sensors based on their different rotational dynamics and acceleration patterns
2Measurement precision
If wheel pulse counter values and rotational acceleration signals are used to determine sensor locations, then location identification accuracy is improved, but system complexity increases
Solution Approach 1:
The patent makes existing components multi-functional: wheel speed sensors originally used for speed measurement now also provide wheel pulse counter values for location identification, and accelerometers originally for vehicle dynamics monitoring now also provide rotational acceleration signals for sensor location determination. This universal approach improves location accuracy without adding dedicated hardware
Solution Approach 2:
The system uses its own operational data (wheel rotation signals and acceleration measurements) to automatically identify sensor locations without requiring external assistance or manual configuration. The tire pressure monitoring system itself generates the information needed to resolve its own identification problem through analysis of its operational characteristics
Data Source
AI summary
The present disclosure relates to a vehicle system and a method for determining a location of a tire pressure sensor. An exemplary embodiment of the present disclosure provides a vehicle system including: a plurality of tire pressure sensors configured to sense air pressure of a tire of a vehicle including a double wheel; a plurality of wheel speed sensors configured to sense a speed of each wheel of the vehicle; and a tire pressure sensor location determining apparatus configured to determine locations of the tire pressure sensors using wheel pulse counter values inputted from the wheel speed sensors whenever the tire pressure sensors transmit tire pressure detection signals.