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US 2026/0036448 A1Published application
Cross-Correlation-Based Manhole Localization Using Ambient Traffic and Fiber Sensing
AssigneeNEC Laboratories America, Inc.
InventorsMilad Salemi, Ming-Fang Huang, Shaobo Han, Yuheng Chen
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Abstract
Systems and methods for manhole localization along deployed fiber optic cables that employs cross-correlation methodologies and ambient road traffic operating proximate to the manholes including fiber optic telecommunications cables to detect the manhole locations using distributed fiber optic sensing (DFOS). Advantageously the manhole locations are determined without employing labor intensive field surveys.
Claims6
A method for detecting location of a manhole, the method comprising:
- receiving, from an optical fiber laid by a manhole, backscattered light containing a vibration pattern corresponding to vehicle movement;
- analyzing, based on the vibration pattern, a vehicle trajectory;
- and
- detecting, based on the vehicle trajectory, a location of the manhole.
1 more element
A location of a manhole detection system comprising:
- a receiver configured to receive backscattered light containing a vibration pattern corresponding to vehicle movement from an optical fiber laid by a manhole;
- a memory configured to store program instructions for detecting a location of a manhole;
- and
- a processing unit configured to execute the program instructions to:
- analyzing the vehicle trajectory based on the vibration pattern,
- detecting a location of the manhole based on the vehicle trajectory.
3 more elements
Dependencies are inferred from the claim text.