Energy efficient sensor technology for continous flowmeasurements using innovative fiber optic hybrid cable

Important results from the project

The purpose of the project has been to develop technology for continuous monitoring of water flow in rivers and streams. The method is based on a fiber-optic hybrid cable capable of measuring water velocity. Within the project, the partners have developed such a fiber-optic sensor cable and verified its performance at flow rates representative of many natural rivers in Sweden. Further development is required to handle the very high flow rates expected near hydropower plants.

Expected long term effects

The results can, in the long term, contribute to more efficient hydropower through improved flow forecasting, optimized plant operation, and reduced equipment wear. The technology also shows potential in other areas where real-time flow data is critical, such as industrial processes. The project has strengthened collaboration between the four partners, enhanced Swedish expertise in fiber optics and cable technology, and established a solid foundation for continued technology development.

Approach and implementation

The main focus has been developing a robust sensor cable and verifying its performance in both laboratory and flow testbed environments. The project was carried out largely as planned, with some delays. Success factors included a consortium with complementary expertise and resources, a clear needs owner, and access to relevant infrastructure for development (RISE Fiberlab), prototyping (Habia Cable), instrumentation and service development (Rejlers), and testing (Vattenfall’s R&D facility).