Vehicle Wheel Sensor Reliability Estimation via Suspension Feedback
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Solution Overview
Problem
Multi-function wheel sensors' measurements are often perturbed by road irregularities, leading to unreliable data in applications such as tire pressure monitoring and tire wear detection, as existing systems fail to account for road conditions.
Innovation Solution
A method that correlates wheel displacement data with sensor measurements to assess reliability, using equipment like stereoscopic cameras, radar systems, and suspension control systems to adapt to road variations, applying decision criteria to determine the consistency and validity of sensor data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wheel sensors are used to monitor tire pressure and position, then tire monitoring capability is improved, but measurement reliability deteriorates due to road irregularities causing data perturbation
Solution Approach 1:
The patent introduces an intermediary system consisting of suspension control equipment and impact sensors that mediate between the road irregularities and the wheel sensors. This intermediary system detects the impact events and uses them to evaluate whether wheel sensor measurements are reliable, thereby protecting the measurement system from the harmful effects of road irregularities.
Solution Approach 2:
The patent implements a feedback mechanism where the central unit receives data from suspension control equipment and impact sensors, evaluates the reliability of wheel sensor measurements based on this feedback, and selectively processes or discards measurements accordingly. This feedback loop enables the system to adapt to road conditions and maintain measurement reliability.
2Measurement precision
If impact sensors and magnetic field monitoring are used to detect tire footprint, then footprint detection capability is improved, but measurement accuracy deteriorates when road profile variations are present
Solution Approach 1:
The patent uses suspension control equipment as an intermediary to detect road profile variations and impact events. This intermediary information is then used to evaluate the reliability of footprint measurements taken by impact sensors and magnetic field sensors, allowing the system to distinguish between legitimate footprint changes and those caused by road irregularities.
3Adaptability or versatility
If wheel sensor data is used for targeted applications, then application functionality is improved, but data accuracy deteriorates due to unexpected transmissions from impacted sensors
Solution Approach 1:
The patent implements a feedback mechanism where the central unit receives information from suspension control equipment about impact events, evaluates the reliability of wheel sensor data based on this feedback, and selectively processes or discards measurements. This ensures that only reliable data is used for targeted applications, maintaining data accuracy while preserving application functionality.
Solution Approach 2:
The patent applies partial action by selectively processing only those wheel sensor measurements that are evaluated as reliable, rather than processing all measurements uniformly. This selective approach ensures that targeted applications receive only accurate data while filtering out measurements corrupted by road impacts.
Data Source
AI summary
A method and system for evaluating the reliability of data supplied by multi-function WFC sensors of tires of wheels of a vehicle for targeted applications, on the basis of the irregularities of the road, which use displacement data sent from the road handling adaptation equipment of the vehicle, enabling the variations in the road condition to be reflected. The system includes equipment for monitoring the wheel displacement data for adapting it to the variations of profile of the road on which it is traveling, in order to maintain a stable body position. The monitoring equipment is linked to the WFC sensors via a central processing unit which is capable of correlating data supplied by the WFC sensors and values of wheel displacement data supplied by the monitoring equipment for the purpose of weighting the values of at least one parameter obtained from the data delivered by the WFC sensors.