The Fornebu Line project, the largest transport project in Oslo in more than 20 years , was finally approved in January 2018 after various proposals and years of planning. The new metro line which is part of Norway’s latest National Transport Plan, will run westward from Oslo’s transport hub at Majorstuen to Fornebu – the site of Oslo’s old airport that has since been redeveloped with large office complexes, housing projects and open space.
The project owner, Oslo Kommune Fornebubanen, needed to do monitoring before, during and after the construction period which can span more than 10 years. To prepare for the geotechnical monitoring for the construction that will start approximately by the end of 2019, the project required a wireless data acquisition system to gather data from sensors that were to be installed in and around the tunnel that will span approximately 8,3 kilometers. To capture and transmit accurate data over this wide territory, the data nodes need to be compatible with different types of sensors and have to ensure minimal manual maintenance when replacing batteries to keep operating costs down and be eco-friendly.