Annular Vibration Sensor Mounting for Stable Signal Repeatability
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Solution Overview
Problem
Existing vibration sensor mounting structures lack stability and repeatability, causing resonance vibrations within the desired measurement range, which interferes with data collection.
Innovation Solution
A vibration sensor mounting structure with a shallow central recess and an annular mounting surface, where the outer radius is significantly larger than the inner radius, ensuring resonant frequencies occur outside the measurement range and stabilizing the mounting force on the outer surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flat mounting surface is used, then the sensor can be easily mounted, but resonance vibrations occur within the measurement range causing signal instability
Solution Approach 1:
The mounting surface is segmented into two distinct zones: a central recessed area and an outer annular mounting surface. This segmentation separates the mounting function from the measurement area, preventing resonance in the central region while maintaining structural integrity through the outer annular surface.
Solution Approach 2:
Different regions of the mounting structure are given different properties: the central area is recessed to avoid resonance, while the outer annular region provides the mounting surface. This local differentiation allows each zone to perform its specific function optimally without interfering with the other.
2Reliability
If the mounting force is applied at the center, then the sensor is securely held, but lateral forces affect the measured signal
Solution Approach 1:
The mounting structure uses an asymmetric force distribution pattern where the mounting force is applied at the outer annular region rather than at the center. This asymmetric arrangement moves the force application point away from the sensor's sensitive central area, reducing lateral force effects on the measurement.
3Reliability
If the contact area is increased, then the mounting stability is improved, but the resonant frequency falls within the measurement range
Solution Approach 1:
The solution moves from a two-dimensional flat mounting surface to a three-dimensional structure with a central recess. This dimensional change allows the mounting surface to be distributed in an annular region, providing sufficient contact area for stability while the recessed central area eliminates resonance within the measurement frequency range.
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
The solution provides a secure, stable mounting structure that prevents undesired resonance within the measurement range, improving signal repeatability and reducing interference from lateral forces.
Implementation Method 1
the values of the inner radius r and the outer radius R are selected to cause the resonant frequency response of the mounting structure to be outside a range of measurement frequencies in which the vibration sensor is used to measure vibration of the machine
Data Source
AI summary
A vibration sensor mounting structure improves the stability and repeatability of a measured signal generated by a machine vibration sensor. The structure has an outer annular surface that contacts the machine under test and a shallow recess inside the outer annular surface. The recess causes resonant vibrations of the mounting structure to occur at frequencies that are above the intended measurement range of the sensor. The recess also allows the mounting force to be positioned away from the center mounting screw and onto the more stable outer annular surface. With the mounting force away from the center, lateral forces have less effect on the measured signal.