Chain Segment Wear Sensing Through Simultaneous Position Detection
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Solution Overview
Problem
Existing methods for determining chain elongation in chain drives are unable to accurately measure elongation of individual segments, requiring complete chain replacement due to uncertainties in chain wear, and are sensitive to speed variations and system irregularities, leading to high costs and unplanned downtimes.
Innovation Solution
A method and sensor device that simultaneously and continuously detect the positions of chain components using sensors, allowing for the determination of individual segment elongation without requiring minimum speed, enabling reliable and timely detection of failure conditions and statistical elongation over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If two markings spaced apart on the chain are detected by two inductive or optical sensors to determine chain elongation, then the circulating speed and chain elongation in the chain segment between the spaced markings can be determined, but conclusions about other areas of the chain or within small segments of the chain are not possible
Solution Approach 1:
The chain is divided into multiple segments, each equipped with its own markings detectable by sensors. This allows individual segment elongation to be measured independently, providing conclusions about specific chain areas rather than just the entire chain length.
Solution Approach 2:
The patent transitions from measuring only the distance between two fixed markings to detecting multiple markings along the chain's length. This adds a spatial dimension to the measurement, enabling localization of wear to specific segments rather than providing only an average elongation value.
2Reliability
If conventional chain wear monitoring methods are used, then chain elongation can be detected, but the chain must be replaced completely due to uncertainties in chain wear distribution
Solution Approach 1:
By measuring elongation of individual chain segments separately, the patent identifies which specific segments have exceeded wear limits. This enables selective replacement of only the worn segments rather than the entire chain, reducing material loss while maintaining reliability.
Solution Approach 2:
The patent applies wear monitoring locally to each chain segment rather than treating the chain as a uniform entity. This allows different segments to have different replacement timelines based on their actual wear condition, optimizing both reliability and resource utilization.
3Measurement precision
If existing chain monitoring systems are implemented, then chain elongation can be measured, but the systems are sensitive to speed variations and system irregularities leading to measurement errors
Solution Approach 1:
The system uses the chain's own movement and the relative motion between markings and sensors to perform measurements. By measuring position changes of markings relative to the sensor over time, the system inherently compensates for speed variations, as the measurement depends on relative displacement rather than absolute speed.
Solution Approach 2:
The patent replaces speed-dependent mechanical measurement methods with a system that measures position and calculates elongation from position changes. This substitution of measurement methodology reduces sensitivity to speed variations and system irregularities.
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
Enables precise monitoring of individual chain segment elongation, reducing the need for complete chain replacement and minimizing unplanned downtimes by detecting wear in real-time, even at zero speed, thus optimizing maintenance and reducing operational costs.
Implementation Method 1
two inductive or optical sensors that are also spaced apart
Data Source
AI summary
The invention relates to a method of determining the elongation of segments of a chain during operation, comprising the following steps: Performing a first detection to determine a position of a first chain component and detecting a first measurement value, performing a second detection to determine a position of a second chain component and detecting a second measurement value, and determining the distance L between the first and the second chain component, wherein the first detection and the second detection are performed simultaneously.