Optical Acoustic Sensing for Conveyor Roller Wear
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for monitoring the state of rollers and bearings in conveyor belts are expensive and prone to failure due to the complexity and large number of components, posing risks such as conveyor belt damage or fires, especially in industries like mining.
Innovation Solution
A distributed optical sensing system using fibre optics to acoustically monitor the condition of rollers and bearings by optically sensing acoustic properties, processing signals to determine fundamental frequencies and harmonics, and analyzing patterns indicative of wear or failure, allowing for simultaneous monitoring of multiple components along a conveyor belt.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wi-fi monitors are installed within each bearing roller to monitor bearing state, then monitoring coverage is improved, but system cost and complexity increase significantly
Solution Approach 1:
The patent merges multiple monitoring functions into a single distributed optical sensing system. Instead of installing individual wi-fi monitors in each bearing roller, a single fibre optic cable runs along the entire conveyor belt, simultaneously monitoring all rollers and bearings through acoustic signature detection. This consolidation reduces the number of monitoring devices from thousands to one while maintaining comprehensive coverage.
Solution Approach 2:
The distributed optical sensing system performs multiple monitoring functions through a single system. The fibre optic cable not only monitors bearing acoustic signatures but also detects roller conditions, belt abnormalities, and other mechanical issues along the conveyor. This multi-functional approach replaces the need for specialized monitors for each component type.
2Reliability
If wi-fi monitors are installed within each bearing roller, then real-time monitoring capability is improved, but cost increases due to large number of components
Solution Approach 1:
The patent combines the function of thousands of individual monitoring devices into a single distributed optical sensing system. The fibre optic cable acts as a continuous sensing medium that replaces discrete monitors at each bearing location, dramatically reducing component quantity while maintaining real-time monitoring of all critical points along the conveyor belt.
3Device complexity
If manual inspection methods are used for conveyor belt monitoring, then system complexity is reduced, but monitoring effectiveness and reliability deteriorate
Solution Approach 1:
The patent replaces manual mechanical inspection methods with an optical sensing system. Instead of personnel physically walking the conveyor belt and manually listening to bearings, the system uses fibre optic acoustic sensing to automatically detect and analyze mechanical signatures, providing objective and consistent monitoring without human intervention.
Solution Approach 2:
The monitoring system performs self-diagnosis by automatically analyzing acoustic signatures from bearings and rollers. The system continuously processes signals, identifies anomalies, and alerts operators without requiring manual inspection, enabling the equipment to monitor itself autonomously.
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 system provides a cost-effective and reliable method for monitoring conveyor belt health, enabling early detection of failures and reducing maintenance costs by accurately identifying wear patterns and potential failures in real-time.
Implementation Method 1
optically sensing the acoustic properties of the plurality of machine parts along their length
Implementation Method 2
utilising the scattering along an optical fibre to sense the acoustic properties
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A method of measuring the state or condition of a plurality of spatially spaced apart machine parts subject to wear and emitting an acoustic signature, the method including the steps of: (a) optically sensing the acoustic properties of the plurality of machine parts subject to wear, and deriving sensed signals there from, (b) dividing the sensed signals into a first series of corresponding spatial segments along the spaced apart machine parts and, for each spatial segment, dividing the sensed signal into a temporal segment recording the acoustic properties for the spatial segment over an extended time period; (c) dividing each temporal segment into a series of sub-segments and frequency domain transforming the sub-segments into corresponding frequency domain sub-segments; (d) combining the frequency domain sub-segments within a spatial segment, to produce a corresponding lower noise level combined frequency domain sub segment; and (e) determining the fundamental frequency of the emitted acoustic signatures present in the combined frequency domain sub segment, and associated harmonics.