Cable Loosening Detection via Acoustic Signal Propagation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for detecting loosening or falling screws in cables, such as visual inspection and tapping sound methods, are inadequate for blind spots, dark places, or remote locations, leading to inconsistent and difficult inspections, especially in equipment like bridge attachments and manholes.
Innovation Solution
A looseness detection structure is formed on the cable surface, featuring a transducer and a detection unit that transmits and receives signals to detect changes in the screw's loosening by analyzing signal propagation, allowing for remote and accurate detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual inspection or tapping sound method is used, then inspection can be performed with simple equipment, but inspection accuracy and reliability deteriorate in blind spots, dark places, or remote locations
Solution Approach 1:
The patent replaces visual inspection and manual tapping methods with an acoustic signal-based detection system. A sensor detects loosening by analyzing changes in acoustic signals (vibration, sound waves) generated when a screw loosens, eliminating the need for direct visual contact or manual inspection in difficult-to-reach areas. This substitution enables remote and automated detection while maintaining or improving accuracy.
Solution Approach 2:
The patent introduces an acoustic signal as an intermediary carrier to transmit information about screw loosening. Instead of requiring direct observation or contact, the system uses sound waves and vibrations that propagate through the structure to convey loosening information to remote sensors, enabling detection in blind spots and dark places without physical access.
2Reliability
If manual visual inspection is performed, then equipment and operational complexity remain low, but inspection consistency and reliability deteriorate due to large individual differences among inspectors
Solution Approach 1:
The system enables self-diagnosis of screw loosening through automated acoustic signal detection. The sensor automatically detects, analyzes, and identifies loosening conditions without requiring human inspectors, eliminating individual differences in inspection judgment. The structure itself 'reports' its condition through acoustic signals,实现ing self-monitoring.
Solution Approach 2:
The patent implements a feedback mechanism where acoustic sensors continuously monitor the structural health by detecting vibration and sound wave changes. The system provides real-time feedback about screw tightness conditions, enabling automated alerting and tracking of loosening progression without relying on periodic manual inspections with variable human judgment.
3Ease of operation
If remote inspection is attempted using simple methods, then operational simplicity is maintained, but detection capability and measurement precision deteriorate
Solution Approach 1:
The patent replaces mechanical inspection methods (visual observation, manual tapping) with acoustic field-based detection. Sensors detect loosening remotely by analyzing acoustic signals that travel through the structure, enabling inspection of remote locations without physical access while maintaining high detection capability through signal processing.
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 enables easy and accurate detection of screw loosening or falling in remote places, improving inspection efficiency and reducing individual variations in results.
Implementation Method 1
transmitting a transmission signal to the structure; the detection unit receiving a reception signal returning after propagating through the structure
Data Source
AI summary
A looseness detection structure includes: a structure (transducer) T which is formed on a surface of a cable; a screw which tightens and fixes the cable in contact with the structure T; and a terminal (detection unit) which transmits a transmission signal to the structure T, receives a reception signal returning after propagating through the structure T, and detects the loosening of the screw based on a change in the reception signal.