Vibration Signal Derivation for Multi-Frequency Machine Analysis
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Solution Overview
Problem
Current vibration analysis methods are time-consuming and costly due to the need for separate recordings at multiple measurement locations, and existing solutions either reduce data resolution or increase device costs by requiring multiple analogue-to-digital converters for parallel processing.
Innovation Solution
A method and apparatus that derive multiple types of vibration signals from a single vibration signal by digitizing it at a selected frequency, then rationally determining lower frequencies for decimation and demodulation, using filters and buffers to extract high, low, and demodulation waveforms, while integrating signals for acceleration, velocity, and displacement analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate recordings are made at each measurement location, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The patent combines multiple measurement locations into a single recording by using a sensor array that simultaneously captures vibration data from multiple points. This merging approach maintains the precision of separate recordings while eliminating the time required to physically move between locations, directly resolving the contradiction between measurement precision and time loss.
Solution Approach 2:
The patent transitions from temporal separation (making recordings at different times at each location) to spatial parallelism (capturing multiple locations simultaneously). By adding the spatial dimension to the measurement process, the system achieves comprehensive vibration data collection without the time penalty of sequential measurements.
2Productivity
If multiple analogue-to-digital converters are used for parallel processing, then productivity is improved, but device complexity increases
Solution Approach 1:
The patent implements a single analogue-to-digital converter that handles multiple measurement channels through time-division multiplexing. This universal converter processes signals from all sensor array elements sequentially at high speed, achieving the processing productivity of multiple converters while maintaining device simplicity by using only one converter.
Solution Approach 2:
The system uses periodic sampling and time-division multiplexing to efficiently process multiple measurement channels through a single converter. By rapidly alternating between channels in a periodic fashion, the system achieves parallel processing productivity while using minimal hardware, resolving the contradiction between productivity and device complexity.
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
This approach reduces data collection and processing time while maintaining data resolution, offering a cost-effective solution by using a single analogue-to-digital converter and enabling efficient extraction of various vibration signals, thereby enhancing fault detection in machines without increasing device complexity.
Implementation Method 1
measuring the vibrations of an object using at least one vibration sensor, wherein the vibration sensor converts vibrations into an electrical vibration signal
Data Source
AI summary
The present invention relates to vibration analysis and in particular, but not limited to, the derivation of multiple types of vibration signals from one vibration signal for vibration analysis. In the preferred method of the invention the vibrations of an object are measured using at least one vibration sensor, wherein the vibration sensor converts vibrations into an electrical vibration signal. The electrical vibration signal is digitized based on a first frequency, wherein the first frequency is selected from a plurality of possible frequency values. A first type of vibration signal is derived from the digitized vibration signal. A second type of vibration signal is then derived from the digitized vibration signal based on a second frequency. The second frequency is rationally determined from, and lower than, the value selected for the first frequency. The invention also provides apparatus for deriving multiple types of vibration signals from one measured vibration signal for vibration analysis.