Vibration Analysis Apparatus Automatic Condition Setting
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Solution Overview
Problem
Conventional vibration analysis apparatuses are challenging for inexperienced users to set appropriate measurement conditions and signal processing, leading to inaccurate determination of abnormalities in rotating machinery, as they require knowledge about vibration analysis and struggle to interpret frequency analysis results.
Innovation Solution
A vibration analysis apparatus and system that includes a setting unit for diagnosis targets, a condition determination unit, an analyzer for frequency analysis, and an abnormality determination unit, implemented on a portable information terminal, which semi-automatically sets measurement conditions and provides clear health state assessments of rotating bodies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If measurement conditions and signal processing are set freely by the user, then the user can adjust parameters according to specific needs, but the user requires knowledge about vibration analysis to set appropriate conditions
Solution Approach 1:
The system automatically determines diagnosis conditions based on the diagnosis target type (bearing, gear, or other rotating machinery) without requiring user input. The microcomputer selects appropriate sampling frequency, measurement time period, and frequency filter bandwidth automatically, making the system self-configureing and eliminating the need for user expertise in vibration analysis settings.
Solution Approach 2:
The system pre-establishes multiple diagnosis conditions with different sampling frequencies and measurement time periods before actual measurement. When a diagnosis target is selected, the system has already prepared appropriate conditions and only needs to select and apply the suitable one, eliminating the need for users to configure parameters from scratch.
2Adaptability or versatility
If the number of diagnosis conditions is increased to cover various rotating bodies, then the system can handle more types of machinery, but the system complexity increases
Solution Approach 1:
The system stores different diagnosis conditions in a database and selects only the relevant conditions based on the specific diagnosis target type. Instead of managing all possible conditions uniformly, the system tailors the selection process to the local requirement of each machinery type, simplifying the overall complexity while maintaining comprehensive coverage.
3Measurement precision
If frequency analysis is performed with high precision, then accurate abnormality detection is achieved, but the measurement time period and sampling frequency requirements increase
Solution Approach 1:
The system dynamically adjusts the measurement time period and sampling frequency based on the selected diagnosis condition and the specific diagnosis target. The microcomputer calculates appropriate parameters automatically, allowing the system to optimize the balance between measurement precision and time efficiency for each specific case rather than using fixed lengthy measurements.
Data Source
AI summary
A vibration analysis apparatus diagnoses a machine state based on vibration detected by a measurement instrument. A setting unit sets a diagnosis target, a rotation speed, and a determination criterion value. A communication unit communicates with the measurement instrument to transmit a trigger to start measurement of vibration to the measurement instrument or to receive data on a vibration waveform from the measurement instrument. A condition determination unit determines a diagnosis condition based on information on the diagnosis target. An analyzer subjects data inputted from the measurement instrument to frequency analysis. An abnormality determination unit makes determination as to an abnormality of the diagnosis target based on the determination criterion value. Thus, the vibration analysis apparatus and a vibration analysis system capable of vibration analysis with certain accuracy being maintained regardless a skill level of a user can be provided.