Vibration Sensor Arrangement for Vehicle Fault Detection
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Solution Overview
Problem
Existing vibration measurement methods are not suitable for examining the wear behavior of slowly rotating or non-rotating parts in vehicles, as they fail to provide meaningful connections with machine parameters, leading to ineffective fault determination.
Innovation Solution
A vibration measurement arrangement using piezoelectric or micromechanical sensors attached to various points on vehicle components, such as shock absorbers and chassis, to record and evaluate vibration behavior directly, providing precise and cost-effective fault detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional vibration measurement methods are used for slowly rotating or non-rotating parts, then measurement can be performed, but the measured values cannot be brought into meaningful connection with machine parameters
Solution Approach 1:
The patent changes the measurement parameters by recording vibration amplitude and frequency characteristics, and by correlating these with specific machine operating parameters (speed, load, temperature), transforms raw vibration data into diagnostically meaningful information that can be directly connected to machine condition assessment
2Measurement precision
If vibration sensors are attached to multiple points on vehicle components, then fault detection precision is improved, but device complexity increases
Solution Approach 1:
The patent divides the measurement system into modular sensor units that can be independently attached to different components (shock absorbers, springs, chassis parts). Each sensor records local vibration characteristics, and the evaluation unit processes these segmented measurements separately before integrating them into a comprehensive fault diagnosis, thereby managing complexity through modularization
3Ease of manufacture
If piezoelectric or micromechanical sensors are used instead of traditional sensors, then cost-effectiveness is improved, but measurement reliability for static parts may be compromised
Solution Approach 1:
The patent utilizes the vehicle's own operational movements (driving over thresholds, normal road vibrations, suspension activity) as the excitation source for the sensors. The sensors are designed to capture these naturally occurring vibrations without requiring external excitation devices, thereby reducing system complexity and cost while maintaining measurement reliability through intelligent signal processing that filters out noise and isolates diagnostically relevant vibration patterns
Data Source
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AI summary
The invention relates to an arrangement and a method for determining and/or evaluating bodies and/or structures moved by vibrations and/or having a drive, particularly of vehicles or motor vehicles, having at least one vibration sensor coupled to an evaluation unit. The at least one vibration sensor comprises a measurement sensor disposed on the body or the structure for determining a vibration behavior.