Wheel Axial Acceleration Analysis for Separation Risk Detection
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Solution Overview
Problem
Conventional wheel state detection technologies fail to accurately identify when a wheel is at risk of separation from the axle during vehicle travel, particularly when the nut is loosened.
Innovation Solution
A wheel state determination apparatus that uses an acceleration sensor to sequentially acquire axial, circumferential, and radial accelerations, determining the road surface condition and setting a dynamic threshold for detecting high axial acceleration anomalies to predict the likelihood of wheel separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If air pressure monitoring is used to detect wheel state, then the device structure is simple, but the ability to detect wheel separation risk is insufficient
Solution Approach 1:
The patent replaces the traditional mechanical/pressure-based wheel state detection system with an acceleration sensor-based detection system. The acceleration sensor measures axial accelerations of the wheel, and through signal processing (including FFT analysis), the system detects wheel separation risks by analyzing vibration patterns caused by loosened nuts or improper fastening, thereby achieving more reliable detection while maintaining reasonable device complexity
Solution Approach 2:
The patent changes the detection parameter from air pressure to axial acceleration. By monitoring axial accelerations and their frequency spectrum characteristics, the system can identify abnormal vibrations that indicate wheel separation risks, providing a more sensitive and reliable detection method compared to pressure monitoring
2Ease of operation
If a fixed threshold is used for acceleration detection, then the determination process is simple, but the accuracy is insufficient under varying road conditions
Solution Approach 1:
The patent implements a dynamic threshold determination mechanism that adapts to varying road conditions. The threshold is not fixed but is dynamically adjusted based on the analyzed vibration characteristics and road surface conditions, allowing the system to maintain high detection accuracy across different operating environments while preserving operational simplicity
Solution Approach 2:
The system employs feedback through continuous analysis of acceleration signals and adaptive threshold adjustment. The determination process uses the acquired vibration data to refine the threshold values, creating a feedback loop that improves detection accuracy under varying conditions while maintaining an straightforward determination workflow
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively detects when a wheel is at risk of coming off, enabling timely maintenance and ensuring safety by providing accurate notifications based on axial acceleration patterns and road surface conditions.
Implementation Method 1
an acceleration sensor provided in the wheel of a vehicle... sequentially acquires axial accelerations in an axial direction of a wheel, the axial accelerations being detected at predetermined intervals by an acceleration sensor
Data Source
AI summary
A wheel state determination apparatus includes: a first acceleration acquisition part that sequentially acquires axial accelerations in an axial direction of a wheel, the axial accelerations being detected at predetermined intervals by an acceleration sensor provided in the wheel of a vehicle, and a wheel separation determination part that determines that the possibility of the wheel coming off is high when the axial acceleration acquired by the first acceleration acquisition part is greater than a predetermined determination threshold value.