Development of an optical fiber flow velocity sensor.

Area of Science:

• Environmental Engineering
• Optical Sensing Technology
• Fluid Dynamics Measurement

Background:

• Sewer drainage systems require reliable flow velocity monitoring.
• Existing sensors may face limitations in power supply and data transmission range.
• Need for robust, low-maintenance sensors in harsh sewer environments.

Purpose of the Study:

• To develop and evaluate a novel optical fiber flow velocity sensor for sewer applications.
• To assess the sensor's performance, power-free operation, and long-distance data transmission capabilities.
• To confirm the sensor's durability and reliability in real-world sewer conditions.

Main Methods:

• Development of an optical fiber sensor integrated with an optical fiber information network system.
• Implementation of the sensor in sewer drainage pipes within a pumping station and sewage pond.
• Field testing over an extended period to evaluate performance and durability.

Main Results:

• The optical fiber flow velocity sensor demonstrated successful operation without requiring electric power.
• Signals were effectively transmitted over long distances via the telecommunication system.
• The sensor operated continuously for over six months without any issues in sewer drainage pipes.

Conclusions:

• The developed optical fiber sensor is a viable, power-free solution for flow velocity measurement in sewer systems.
• Its long-distance data transmission and robust performance make it suitable for challenging environments.
• The sensor offers a reliable and low-maintenance option for sewer infrastructure monitoring.