Indoor Floor Positioning via Acoustic Signals and Map Segmentation
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Solution Overview
Problem
Current route guidance services struggle to accurately identify a terminal device's position within a multi-floor building using GPS signals, especially when the device moves between floors, as they cannot provide specific floor information within a destination building.
Innovation Solution
A route guidance service apparatus that includes a checking unit to identify a particular floor based on a destination keyword, a calculation unit to distinguish the floor from others using building information, and a control unit to arrange floor information adjacent to the destination building, allowing intuitive recognition of indoor maps. Additionally, the apparatus uses sensor measurement information and acoustic signals to determine terminal device movement between floors, enabling accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS signal is used to check position, then outdoor navigation is improved, but indoor multi-floor positioning accuracy deteriorates
Solution Approach 1:
The patent introduces acoustic signals as an intermediary method for position identification when GPS is unavailable or insufficient. The system uses acoustic signals from floor identification devices to determine the terminal device's floor position, complementing GPS for comprehensive indoor-outdoor navigation coverage.
Solution Approach 2:
The position identification system is designed to support multiple positioning methods (GPS and acoustic signals) within a single framework. The system automatically selects or combines positioning methods based on the environment, achieving universal applicability across outdoor and indoor multi-floor scenarios.
2Area of stationary object
If overall building map is displayed, then building overview is improved, but specific floor information visibility deteriorates
Solution Approach 1:
The map display is segmented into multiple floor-level maps, each showing detailed information for a specific floor. The system divides the building map by floors and displays only the relevant floor map based on the terminal device's identified position, preventing information overload while maintaining comprehensive coverage.
Solution Approach 2:
The system applies local quality by displaying different map details for different floors. Each floor map is customized to show locally relevant information (shops, fixtures, routes) specific to that floor, rather than uniformly displaying all building information across all floors.
3Measurement precision
If floor information is displayed separately, then floor recognition is improved, but user operation complexity increases
Solution Approach 1:
The system performs automatic floor identification using acoustic signals and sensor data, eliminating the need for manual floor selection by users. The terminal device automatically determines its floor position and displays the corresponding floor map, reducing operational complexity while maintaining high floor identification accuracy.
Solution Approach 2:
The system uses feedback from acoustic signals and sensor measurements to automatically adjust and update the displayed floor map. When the terminal device moves between floors, the system detects the position change through feedback signals and automatically switches to display the appropriate floor information without requiring user intervention.
Data Source
AI summary
A route guidance service apparatus includes: a checking unit configured to check a particular floor in a destination building based on a destination keyword; a calculation unit configured to calculate an output level of the particular floor based on building information related to the destination building so as to distinguish the particular floor from other floors; and a control unit configured to perform a control operation such that floor information related to the particular floor is separately arranged at a position adjacent to the destination building when the particular layer is selected.