OTDR Testing with Design Database Integration
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Solution Overview
Problem
Current fiber optic testing methods using OTDR are time-consuming due to the need to consult multiple databases for determining discontinuities in fiber optic pathways within vehicles, as technicians often incorrectly configure testing devices for the wrong cable length, leading to difficulties in pinpointing exact fault locations.
Innovation Solution
A system combining an OTDR device with a design database and a processor that calculates distance-to-fault based on OTDR data, generates fault data, and provides a graphical user interface to identify connectivity failures and signal loss issues within fiber optic cables, including 3-point vehicle coordinates for precise fault location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If technicians use traditional OTDR testing methods without integrated design data, then they can obtain basic OTDR data, but they must consult multiple external databases to determine cable length and fault locations, which significantly increases testing time
Solution Approach 1:
The patent merges the OTDR testing device with design data storage and processing capabilities into a single integrated system. The design database containing cable length, routing, and connector information is built into the testing device, eliminating the need to consult separate external databases and enabling direct comparison of OTDR measurements with design specifications to quickly identify faults.
Solution Approach 2:
The testing device is enhanced to perform multiple functions: it not only captures OTDR data but also stores design data, processes both data types together, compares measurements against design specifications, and automatically identifies fault locations. This multi-functional integration allows a single device to replace what previously required multiple separate tools and databases.
2Measurement precision
If technicians configure OTDR devices without accurate design data integration, then they can perform testing, but they often incorrectly set cable length parameters, leading to inaccurate fault location measurements
Solution Approach 1:
The design data including accurate cable length, routing, and connector information is pre-loaded into the testing device before field use. This preliminary preparation eliminates the need for technicians to manually configure these parameters during testing, ensuring that the device is always set with correct values and preventing configuration errors that would compromise measurement accuracy.
3Productivity
If the system integrates design database with OTDR device, then fault identification becomes automated and faster, but the device complexity increases due to added processing and storage components
Solution Approach 1:
The integrated system automatically performs data processing, comparison, and fault identification without requiring external assistance or manual intervention. The processor autonomously compares OTDR measurements with design data, calculates distance-to-fault, identifies fault locations, and generates test results, enabling the device to serve itself and eliminate the need for technicians to perform complex manual analysis procedures.
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 significantly reduces testing time by enabling quick identification of connectivity failures and signal loss issues, minimizing human error through graphical data superimposition and precise fault location within vehicles, allowing for faster fiber optic system maintenance.
Implementation Method 1
an optical time domain reflectometry (OTDR) device configured to selectively couple to an input connector of a cable
Data Source
AI summary
A system for testing continuity of a cable assembly includes an optical time domain reflectometry (OTDR) device selectively coupled to an input connector of a cable and a design database storing cable data. The cable data indicates at least a length of the cable. The system includes a processor and memory in communication with the processor. The processor is configured to execute instructions stored on the memory which cause the processor to receive the cable data from the design database, receive OTDR data associated with the cable from the OTDR device, and calculate a distance-to-fault based on the OTDR data. In response to the distance-to-fault being less than the length of the cable, the processor determines that a connectivity failure has occurred with the cable and generates fault data indicating the connectivity failure.