Ball Joint Wear Measurement Using Inductive Sensors
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Solution Overview
Problem
Existing ball joints in vehicles face challenges in accurately determining wear levels independently of external influences, leading to imprecise diagnosis and potential safety issues due to increased play and friction.
Innovation Solution
A ball joint with a device using distance sensors, preferably inductive or capacitive, to measure the relative position of the joint ball to the housing, allowing for accurate wear determination without external interference, and optionally incorporating an angle sensor and additional mechanical state sensors for comprehensive evaluation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If magnetic field sensors and permanent magnets are used to detect wear, then wear detection capability is provided, but external magnetic fields influence the measurement result reducing accuracy
Solution Approach 1:
The patent replaces magnetic field-based wear detection with a mechanical measurement system. A measuring device with a measuring arm and measuring point mechanically contacts the joint ball to directly measure play and wear, eliminating susceptibility to external magnetic field interference while maintaining wear detection capability
Solution Approach 2:
The patent introduces a mechanical intermediary (measuring arm with measuring point) that physically contacts the joint ball to transfer wear information to the sensor. This mechanical intermediary isolates the measurement from external magnetic field influences while preserving the ability to detect wear through direct mechanical contact
2Reliability
If ball joints are monitored for wear to ensure safety, then vehicle safety is improved, but diagnosis is complex and requires specialists
Solution Approach 1:
The patent enables the ball joint to self-diagnose wear conditions through integrated sensors and processing units that automatically monitor play and wear. The system processes measurements internally and can trigger warnings or notifications, eliminating the need for specialist diagnosis while maintaining safety monitoring
Solution Approach 2:
The patent implements a feedback system where wear measurements are continuously monitored, processed, and used to generate diagnostic information. The processing unit receives measurement data, evaluates wear levels, and can provide feedback through warnings or notifications, simplifying the diagnostic process while ensuring safety
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
Enables precise and reliable wear state assessment of the ball joint, independent of external magnetic fields and tilting angles, facilitating timely replacement and ensuring vehicle safety and precise steering.
Implementation Method 1
distance sensors, preferably inductive or capacitive, to measure the relative position of the joint ball to the housing
Implementation Method 2
distance sensors, preferably inductive or capacitive, to measure the relative position of the joint ball to the housing
Data Source
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AI summary
The invention relates to a ball joint (1), in particular for a vehicle, comprising a housing (2) and a ball pin (3), which has a joint ball (4) and is pivotably supported in the housing (2) by means of the joint ball (4) and extends out through an opening (5) of the housing (2). Said ball joint is characterized by a device (7, 8, 10), by means of which a relative position of the joint ball (4) with respect to the housing (2) can be determined in order to derive a wear state of the ball joint (1) from the relative position.