Optical Fiber Cable Locking System for Theft Detection
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Solution Overview
Problem
Cables used to secure valuable assets are easily severed by tools like cable cutters or saws, allowing for theft without detection.
Innovation Solution
A theft protection system incorporating a cable with an inner optical waveguide that is secured to a device using a locking mechanism, aligning the cable's ends with a light emitter and detector, such that severing the cable interrupts light transmission, triggering a warning signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a cable is used to secure a valuable asset to a larger object, then the asset is physically retained and theft becomes more difficult, but the cable can be easily severed by cable cutters, splicers or saws allowing theft
Solution Approach 1:
The patent replaces the purely mechanical cable system with an optical detection system. An optical fiber is embedded within the cable to detect severing events. When the cable is cut, the optical fiber detects the interruption of light transmission, triggering an alarm. This substitution allows the mechanical cable to be monitored for integrity, transforming it from a passive security measure to an active detection system.
Solution Approach 2:
The patent creates a composite cable structure that combines traditional mechanical cable materials (for physical security and strength) with optical fiber (for detection and monitoring). This composite construction allows the cable to simultaneously provide mechanical retention and optical detection capabilities, resolving the contradiction between physical strength and theft detection reliability.
2Reliability
If an optical fiber is embedded in the cable to detect severing, then theft detection reliability is improved, but the device complexity increases due to alignment requirements
Solution Approach 1:
The patent merges the optical detection system with the existing cable and locking mechanism structures. The optical fiber is routed through the locking mechanism and integrated into the cable assembly, so that the detection system becomes part of the overall security structure rather than a separate added component. This integration reduces the practical complexity despite the sophisticated detection capability.
Solution Approach 2:
The optical fiber system is designed to be self-aligning through the mechanical constraints of the locking mechanism. The fiber's position is maintained by the physical structure of the lock and cable assembly, eliminating the need for complex active alignment systems or continuous adjustment mechanisms. The system serves itself by using the mechanical structure to maintain optical alignment.
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 system effectively prevents theft by generating a warning signal upon cable severance, which can trigger alarms, data protection, or location tracking, providing enhanced security against unauthorized removal.
Implementation Method 1
an inner optical waveguide... align the first end of the cable to a light emitter in the device and to align the second end of the cable to a light detector... severing the cable interrupts light transmission
Data Source
AI summary
A theft protection system for a device includes a cable having an inner optical waveguide and first and second ends, a locking mechanism to releasably securing the cable to the device and align the first end of the cable to a light emitter in the device and to align the second end of the cable to a light detector in the device such that severing the cable interrupts light transmission via the optical waveguide between the light emitter and light detector.