Distributed Acoustic Sensing for Utility Pole Localization
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Solution Overview
Problem
Utility pole localization along overhead cable routes is challenging due to extra cable loops, branches, and redundancy, making it difficult for telecommunications and utility companies to accurately determine the location and distance of poles from a fiber cable starting point.
Innovation Solution
Employing distributed acoustic sensing (DAS) systems in conjunction with mechanical impacts and signal processing to detect strain changes in optical fiber cables, allowing for the localization of utility poles by identifying boundary points between compression and tension in DAS signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional cable routing methods are used with extra loops and branches for future drops and redundancy, then cable flexibility and future adaptability are improved, but pole location measurement precision deteriorates
Solution Approach 1:
The patent replaces traditional mechanical cable measurement methods with distributed acoustic sensing (DAS) technology. DAS uses optical fiber cables to detect strain changes caused by mechanical impacts on utility poles, converting physical pole locations into detectable optical signals. This substitution eliminates the need for manual cable routing measurements and resolves the contradiction by providing precise pole location data independent of cable loop configurations.
Solution Approach 2:
The patent introduces an intermediary mechanism - the optical fiber cable acting as a sensing medium - between the utility pole and the measurement system. When a pole is struck, the resulting mechanical vibration transfers to the attached fiber cable, creating detectable strain patterns. This intermediary enables indirect detection of pole locations without requiring direct physical measurement along the cable route, thereby maintaining cable routing flexibility while achieving precise pole localization.
2Productivity
If manual pole location estimation methods are used, then device complexity is reduced, but productivity and efficiency deteriorate
Solution Approach 1:
The patent implements a self-service system where the existing optical fiber cable infrastructure serves dual purposes: both communication transmission and pole location sensing. The fiber cable itself acts as the sensing element, eliminating the need for separate measurement devices. This self-service approach significantly improves productivity by enabling automated pole location determination while avoiding additional device complexity, as the communication infrastructure performs the sensing function.
Solution Approach 2:
The patent applies multi-functionality to the optical fiber cable, which simultaneously serves as both a communication medium and a sensing element for pole localization. This universal application allows the same infrastructure to perform multiple functions, improving productivity without requiring additional specialized equipment. The DAS interrogator unit processes both communication signals and sensing data, further realizing the multi-functional approach and maintaining system simplicity.
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 accurate localization of utility poles along fiber optic cable routes by analyzing strain changes caused by mechanical impacts, improving the efficiency of pole location determination and maintenance operations.
Implementation Method 1
employ DAS methodologies, in conjunction with mechanical impact and signal processing to localize utility pole(s) along an optical fiber cable route
Implementation Method 2
The aerial fiber cable experiences a sudden strain change due to the mechanical vibrations of the pole(s)
Implementation Method 3
mechanical impacts (i.e., hammer knocks) are provided to target pole(s) along the fiber route
Implementation Method 4
the fiber cable is compressed on one side of the pole experiencing the impact
Implementation Method 5
stretched on the other side of the pole
Data Source
AI summary
Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) distributed acoustic sensing (DAS) systems, methods, and structures that advantageously provide the localization of utility poles along a route of fiber optic cable.