Motion Sensor Route Guidance for GPS-Free Parking Navigation
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Solution Overview
Problem
In large parking lots, especially those with multiple floors, users often face challenges in locating their parked vehicles due to weak or absent GPS signals, leading to inaccurate or unavailable route guidance services.
Innovation Solution
A user terminal equipped with motion sensors, such as accelerometers and gyroscopes, tracks movement information to register key points and provide route guidance through a user interface, even without a GPS signal, by filtering specific patterns and displaying real-time moving routes, distance, altitude, and estimated time of arrival.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If GPS signal is used for route guidance, then route guidance service can be provided, but GPS signal is weak or not received when vehicle is parked underground
Solution Approach 1:
The patent uses motion sensors (accelerometer, gyroscope, barometer) as intermediary devices to track user movement when GPS signals are unavailable. These sensors serve as mediators between the user terminal and the routing system, enabling route guidance through alternative measurement methods in underground parking environments where GPS signals cannot penetrate.
Solution Approach 2:
The patent replaces the GPS satellite-based electromagnetic signal system with a local motion sensing system. Instead of relying on external GPS signals, the system uses onboard motion sensors to detect and track physical movement, substituting a mechanical sensing approach for the electromagnetic signal-based GPS system.
2Reliability
If motion sensors are used to track movement, then route guidance can be provided without GPS signal, but device complexity increases
Solution Approach 1:
The patent leverages the fact that modern user terminals already contain motion sensors for other purposes (step counting, screen orientation, altitude detection). By repurposing these existing multi-functional sensors for route guidance, the system avoids adding dedicated hardware while still achieving GPS-independent navigation capability.
Solution Approach 2:
The system uses the user terminal's own built-in motion sensors to provide route guidance, making the device self-sufficient. Instead of requiring external GPS infrastructure, the terminal serves itself by utilizing its inherent sensing capabilities to track movement and provide navigation feedback.
3Measurement precision
If multiple sensors are used for movement tracking, then accuracy of route guidance improves, but use of energy increases
Solution Approach 1:
The patent combines multiple sensor data types (accelerometer for motion detection, gyroscope for orientation, barometer for altitude) into a unified route tracking system. By merging these sensor inputs and processing them together, the system achieves accurate 3D movement tracking while optimizing energy usage through coordinated sensor operation rather than independent sensor activation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate and reliable route guidance to parked vehicles even in areas with weak or no GPS signal, improving user navigation within multi-level parking structures.
Implementation Method 1
acquiring the information on the number of steps of the user using an accelerometer sensor
Implementation Method 2
acquiring the movement information of the user terminal using a gyroscope sensor
Implementation Method 3
acquiring the change in altitude of the user terminal using a pressure sensor
Data Source
AI summary
A user terminal and a control method thereof are provided. The control method of a user terminal includes registering a first point, acquiring movement information of the user terminal using a motion sensor when the user terminal moves from the first point to a second point, and providing a user interface (UI) for guiding to the first point on the basis of the movement information if a user command for a return is input. As a result, the user terminal makes it possible to provide the route guidance service to a destination by tracking the moving route of the user terminal when the global positioning system (GPS) signal may not be received.