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A Hybrid Indoor Altimetry Based on Barometer and UWB
Minghao Si1, Yunjia Wang1, Ning Zhou2
1Key Laboratory for Land Environment and Disaster Monitoring, China University of Mining and Technology, Xuzhou 221116, China.
Sensors (Basel, Switzerland)
|May 13, 2023
Summary
This study introduces a new indoor altimetry system using floor identification for precise height measurements in complex buildings. The innovative approach significantly enhances accuracy, overcoming limitations of current methods.
Area of Science:
- Indoor positioning systems
- Geomatics engineering
- Sensor fusion
Background:
- Accurate altimetry is crucial for location-based services but is challenged by complex indoor environments.
- Existing methods lack precision in multistorey buildings with irregular structures and hollow areas.
Purpose of the Study:
- To develop a tightly coupled indoor altimetry system with enhanced height measurement accuracy.
- To improve floor identification and z-axis coordinate convergence in challenging indoor settings.
Main Methods:
- A novel system integrating optimized algorithms for activity-based floor identification.
- Constrained iterative least squares (ILS) to address z-axis coplanarity issues.
- Experimental validation in diverse indoor environments, including irregular structures.
Main Results:
- Activity detection significantly improves floor identification accuracy compared to other methods.
- The system effectively handles dynamic (up/downstairs) and static (barometric drift) conditions.
- Constrained ILS demonstrates superior positioning accuracy over ILS, 1D-CNN, and WC, with notable improvements in both test environments.
Conclusions:
- The proposed indoor altimetry system offers a substantial advancement in height measurement accuracy for commercial and industrial applications.
- Floor identification via activity detection and constrained ILS are key innovations for robust indoor positioning.
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