Wheel Nut Fastening Detection Using Rotating Acceleration Signals
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Solution Overview
Problem
Existing detection devices struggle to easily detect the mounting state of fastening members that secure rotating bodies like wheel rims, particularly due to interference from the type and size of the rotating body.
Innovation Solution
A detection device with an acceleration detection unit that rotates with the fastening member, detecting acceleration along intersecting axes, and a state detection unit that analyzes this acceleration to determine the fastening state, independent of the rotating body's type and size, using centrifugal acceleration and rotation angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a detection device uses a detector to detect the mounting state of a tire or wheel rim, then the mounting state can be detected, but the detection is affected by the type, size and other characteristics of the rotating body
Solution Approach 1:
The patent changes the detection parameter from position-based detection to acceleration-based detection. By detecting acceleration values and their changes over time, the system can identify mounting states without being influenced by the type or size of the rotating body. The acceleration detection unit measures acceleration in multiple directions, and the control unit analyzes the temporal changes in these acceleration values to determine mounting states, making the detection method universally applicable to different rotating bodies.
2Measurement precision
If a detection device is designed to work with specific rotating body types, then detection accuracy is improved, but the device complexity increases when adapting to different rotating body types and sizes
Solution Approach 1:
The patent creates a universal detection system that can detect mounting states across different rotating body types without requiring device modification. The acceleration detection unit and control unit work together to analyze acceleration patterns that are common to all rotating bodies, enabling a single device design to serve multiple applications while maintaining detection accuracy.
3Device complexity
If position-based detection methods are used for mounting state detection, then the detection method is simple, but the detection accuracy is insufficient due to interference from rotating body characteristics
Solution Approach 1:
The patent replaces position-based mechanical detection with acceleration-based detection. Instead of using mechanical position sensors that are influenced by the physical characteristics of the rotating body, the system uses acceleration sensors to detect vibrations and acceleration patterns. The control unit then analyzes the temporal changes in acceleration values to determine mounting states, achieving both simplicity and accuracy.
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
The efficacy of the detection device is the detection device is the detection device is the ability to easily and accurately determine the fastening state of a fastening member, regardless of the rotating body's type or size, by analyzing centrifugal acceleration and rotation angle.
Implementation Method 1
the acceleration of the fastening member is determined based on a centrifugal acceleration of the rotating body and a rotation angle of the fastening member
Data Source
AI summary
A sensor device includes: an acceleration sensor that rotates in conjunction with rotation of a nut that fastens a wheel hub to a wheel rim and detects an acceleration along a detection axis that intersects with a rotation axis of the wheel rim; and a signal processor that detects a fastening state of the nut based on the acceleration detected by the acceleration sensor.