Machinery Mount Health Monitoring via Modal Frequency Analysis
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Solution Overview
Problem
The existing technologies fail to effectively monitor the joint stiffness between machinery mounts and the ground, leading to potential abnormal vibrations during machining processes, which can decrease the precision of machine devices.
Innovation Solution
A device comprising vibration detectors, a signal acquisition unit, and a signal processor that performs modal frequency analysis, transmissibility calculation, and singular value decomposition to determine the healthy status of machinery mounts by comparing natural frequencies with optimized reference modes, using the modal assurance criterion to assess the joint stiffness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the user adjusts the height of the machinery mounts to calibrate the levelness of the machine device, then the levelness of the machine device conforms to the levelness standard value, but the joint stiffness between the machinery mounts and the ground may be insufficient
Solution Approach 1:
The patent implements a feedback mechanism by using vibration detectors to continuously monitor the vibration signals of the machine device and comparing the detected natural frequency with the reference natural frequency. When the joint stiffness is insufficient, the system provides feedback information to prompt the user to adjust the machinery mounts, thereby maintaining both levelness precision and joint stiffness reliability.
Solution Approach 2:
The patent replaces the traditional mechanical levelness adjustment system with a vibration-based monitoring system. Instead of relying solely on mechanical levelness calibration, the system uses vibration detectors and frequency analysis to assess the joint stiffness condition, substituting mechanical adjustment with diagnostic measurement and intelligent feedback.
2Device complexity
If no monitoring system is installed, then the device complexity is low, but abnormal vibrations may be incurred during the machining process
Solution Approach 1:
The patent introduces vibration detectors as intermediary devices that mediate between the machine device and the monitoring system. These detectors capture vibration signals and transmit them to the processor, which analyzes the natural frequency to assess joint stiffness. This intermediary approach enables effective monitoring with minimal added complexity, preventing abnormal vibrations through non-intrusive measurement.
3Measurement precision
If vibration detectors and signal processing equipment are installed to monitor joint stiffness, then the healthy status of machinery mounts can be determined, but the device complexity increases
Solution Approach 1:
The patent extracts only the essential function needed for monitoring - detecting natural frequency changes - and implements it through simple vibration detectors and basic signal processing. By taking out only the critical measurement capability rather than implementing a comprehensive monitoring system, the patent achieves accurate joint stiffness measurement with minimal 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 solution allows for precise monitoring of joint stiffness, preventing abnormal vibrations and enhancing the precision of machine devices by efficiently determining the health status of machinery mounts, facilitating timely adjustments or replacements, and increasing the commercial value of machine devices.
Implementation Method 1
a plurality of vibration detectors 11, a signal acquisition device 12 and a signal processor 13. The vibration detectors 11 may detect the vibration signals from a machine device
Data Source
AI summary
A device for monitoring healthy status of machinery mounts is provided, which may include a plurality of vibration detectors, a signal acquisition device and a signal processor. The vibration detectors may detect the vibration signals from of a machine device, where the machine device may include a plurality of machinery mounts. The signal acquisition device may receive the vibration signals of the vibration detectors. The signal processor may execute a modal frequency analysis process to analyze the vibration signals of the vibration detectors, and calculate a vibration mode corresponding to the natural frequency of the machinery mounts in current status to serve as the test mode; then, the signal processor may compare the test mode with a reference mode to determine the healthy status of the machinery mounts, where the reference mode is corresponding to the natural frequency of the machinery mounts in the optimized status.