Chain Slack Measurement Using Gravitational Acceleration Sensing
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Solution Overview
Problem
Existing methods for measuring the slack amount of a chain, such as using calipers or dedicated tools, suffer from variability in measurement accuracy among operators and require visual aiming, which can lead to inaccuracies.
Innovation Solution
A chain measurement device equipped with an acceleration sensor that detects acceleration in the gravitational direction when attached to the chain and lifted upward within the slack range, allowing for accurate calculation of the slack amount through second-order numerical integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual measurement methods (caliper or dedicated tool) are used, then measurement can be performed with simple equipment, but measurement accuracy varies among operators and is limited by visual aiming
Solution Approach 1:
The patent replaces visual-mechanical measurement methods with an acceleration sensor-based detection system. The acceleration sensor detects gravitational acceleration changes when the chain is lifted, eliminating the need for visual aiming and operator judgment, thereby significantly improving measurement accuracy while maintaining relatively simple device structure
Solution Approach 2:
The patent changes the measurement parameter from direct positional measurement (visual method) to acceleration-based indirect measurement. By detecting acceleration in the gravitational direction during chain lifting and integrating the data, the system achieves higher precision measurement without complex mechanical structures
2Ease of operation
If visual measurement by operator is used, then device structure can be simple, but workability is reduced due to requiring visual aiming and manual operation
Solution Approach 1:
The measurement system performs self-measurement by automatically detecting acceleration data when the chain is lifted. The acceleration sensor and integration calculation automatically compute the slack amount without requiring operator visual judgment or manual reading, making the operation simpler and faster
Solution Approach 2:
The patent replaces manual visual measurement with automated acceleration-based detection. The system automatically captures acceleration data during lifting and calculates slack amount through integration, eliminating the time-consuming visual aiming process and improving operational efficiency
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 enables precise and operator-independent measurement of the chain's slack amount, improving measurement accuracy and workability by simplifying the measurement process.
Implementation Method 1
an acceleration sensor configured to detect acceleration in a gravitational direction
Implementation Method 2
the acceleration sensor is configured to detect acceleration in the gravitational direction in a case where the main body portion attached to the chain is lifted upward within a range of a slack amount of the chain and then dropped
Data Source
AI summary
A chain measurement device is for measuring a slack amount of a chain wound around sprockets. The chain measurement device includes a main body portion including an acceleration sensor, and an attachment portion configured to attach the main body portion to the chain. The acceleration sensor is configured to detect acceleration in a gravitational direction in a case where the main body portion attached to the chain is lifted upward within a range of the slack amount of the chain and then dropped.