Outdoor localisation system based on magnetic landmarks – magnetic anomalies that distort the expected geomagnetic field due to strong local magnetic fields, oftentimes originated by fixed man-made structures. This technology proposes to leverage those landmarks as signatures for localisation purposes.
The most common systems for outdoor positioning use GNSS (e.g. GPS) and/or inertial data. Satellite-based solutions have strong limitations (e.g. large positioning errors or outages) in multipath environments and non-line-of-sight conditions to the satellites, such as urban canyons, tunnels and underground parking. They are often combined with other sources of information to complement them, such as inertial sensors. Nonetheless, inertial data systemsapplydead reckoning and present cumulative errors. The quality of the sensors has a high impact on the accuracy of the estimation, however, it strongly influences their price as well.
Magnetic information is frequently used in combination with other inertial data for orientation purposes in navigation systems and vehiclelocalisation. The present technology uses magnetic landmarks created by magnetic anomalies that distort the expected magnetic field, often man-made structures. This technology results in alocalisation system that works in locations where satellite-based solutions are not available or not not accurate enough. This new method can be integrated as a module to improve the robustness, availability and accuracy of alocalisation system, improving its resilience to disturbances in GPS or cumulative errors.
The main outcomes of this new technology are: 1) a method for detecting magnetic anomalies; 2) a system for collecting and saving classified instances for reference; 3) an algorithm that matches input magnetic anomalies to the known stored references, both for complete and partial time series.
Geolocalisation systems demanding high performances:
- Traffic navigation in intricate scenarios (e.g. city centers, tunnels, multiple layer paths and intersections)
- Emergency assistance
- Civil protection
PORTABILITY: the invention uses a mobile device equipped with inertial sensors and magnetometer to detect and match magnetic anomalies to references, providing location data.
GREAT IMPROVEMENT TO CURRENT LOCALISATION SYSTEMS: the technology can be modularly combined with existinglocalisation solutions:
- Higher robustness
- Higher accuracy
- Higher availability
TRL 2 - The concept has been established
- Licensing agreement
- Testing new applications
- Joint further developments
Instituto de Telecomunicaçõesseeks partners within geolocalisation/georeferencing markets, aswell asnavigation systems providers.
International patentapplication (PCT/IB2021/051316) - prioritydate:18-02-2020