Wireless Vibration Monitoring Time Synchronization
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Solution Overview
Problem
Existing wireless vibration monitoring systems face challenges in conducting effective association analysis of data acquired by different devices due to differing time references, which hinders accurate order analysis in rotary machines like wind power generators and oil transfer pumps.
Innovation Solution
A wireless vibration data acquisition scheme that synchronizes the time references between rotating speed and vibration data acquisition apparatuses by using a centralized acquisition station to coordinate the data collection and mapping, ensuring that both types of data are aligned for comprehensive diagnostic analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless monitoring is used to avoid wiring complexity and safety risks, then ease of operation and safety are improved, but time reference synchronization between different acquisition devices becomes difficult to achieve
Solution Approach 1:
The patent introduces a centralized acquisition station as an intermediary device that coordinates multiple wireless acquisition devices. The acquisition station receives data from multiple devices, performs time reference synchronization, and manages data association. This mediator resolves the synchronization difficulty inherent in distributed wireless monitoring while preserving the ease of deployment advantage.
Solution Approach 2:
The system performs preliminary time reference synchronization and device coordination through the acquisition station before data analysis. By pre-establishing time references and association relationships, the system ensures that when vibration and rotating speed data are collected wirelessly, they are already synchronized and ready for accurate order analysis, eliminating the need for complex post-processing synchronization.
2Device complexity
If data from different acquisition devices are collected independently, then device complexity is reduced, but the ability to conduct effective association analysis deteriorates
Solution Approach 1:
The patent merges data from multiple independent acquisition devices at the acquisition station. The station collects vibration data, rotating speed data, and other operational parameters, then integrates them into a unified dataset with established time references and association relationships. This combining approach maintains simple individual devices while achieving comprehensive data association analysis capability.
Solution Approach 2:
The acquisition station serves as an intermediary that receives data from multiple simple acquisition devices and performs the complex task of data association. By placing the association logic in the intermediary station rather than in each individual device, the system maintains low device complexity while preserving full data association capability for order analysis.
3Measurement precision
If continuous sampling is performed to ensure data completeness, then measurement precision is improved, but energy consumption and data processing burden increase
Solution Approach 1:
The system performs periodic sampling of vibration and rotating speed data at the acquisition station rather than continuous monitoring. By sampling at appropriate intervals and synchronizing with the rotational frequency of the monitored equipment, the system maintains data completeness for order analysis while significantly reducing energy consumption and data processing requirements compared to continuous sampling.
Data Source
AI summary
The invention discloses a method, an apparatus, and a monitoring system for acquisition of a machine's rotating speed and vibration data. A machine rotating speed acquisition apparatus according to the inventive disclosure comprises a speed sensor and a controlling unit. The speed sensor is operative to count the pulses triggered during the rotation of the machine so as to acquire the machine's rotating speed. The controlling unit is operative to record the triggering moment of each pulse. Furthermore, each time when a pulse triggering moment is recorded, a rotating speed time scale message containing that pulse triggering moment is broadcasted to at least one machine vibration data acquisition apparatus, in order for the at least one machine vibration data acquisition apparatus to receive that rotating speed time scale message and record the local time when receiving that message.