Navigation Device Parking Position Detection
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Solution Overview
Problem
Existing navigation devices lack a reliable method to detect and store the position of a parked vehicle, making it difficult for users to navigate back to their vehicle after leaving it, especially in scenarios where GPS signals are lost or the device is disconnected from the vehicle.
Innovation Solution
A navigation device that detects parking by breaking connection with the vehicle through sensors like release buttons, proximity sensors, or contact sensors, and uses positioning devices like GPS, accelerometers, and gyroscopes to store and retrieve the parked vehicle's location, allowing users to navigate back to it.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS-based navigation is used to determine vehicle position, then positioning capability is improved, but reliability is worsened when GPS signals are lost or device is disconnected from vehicle
Solution Approach 1:
The system performs preliminary actions by detecting vehicle parking status through connection status sensors before GPS signal loss occurs. When the device detects disconnection from the vehicle (via release button, proximity sensor, or contact sensor), it proactively stores the current position data and parking status, ensuring position information is preserved even when GPS signals are subsequently lost in underground garages or remote areas.
Solution Approach 2:
The patent introduces intermediary detection mechanisms (release buttons, proximity sensors, contact sensors) that mediate between the navigation device and vehicle to detect parking status. These sensors serve as intermediaries that can reliably detect parking events without depending on continuous GPS signals, thereby maintaining system reliability when GPS is unavailable.
2Reliability
If multiple sensors are added to detect parking status, then detection reliability is improved, but device complexity is worsened
Solution Approach 1:
The navigation device leverages existing multi-functional components to detect parking status. The release button, originally designed for device removal, also serves as a parking detection sensor. The proximity sensor, intended for general proximity detection, dual-functions to detect both approach and parking events. This multi-functionality approach improves detection reliability without adding dedicated single-purpose components.
Solution Approach 2:
The system uses components already present in the navigation device or vehicle for parking detection, rather than requiring entirely new dedicated sensors. The release button and proximity sensor utilize their inherent functionality to simultaneously serve their original purposes and parking detection, making the system self-sufficient and avoiding additional complexity.
3Ease of operation
If connection status sensors are used to detect parking, then ease of operation is improved, but device complexity is worsened
Solution Approach 1:
The navigation device automatically detects parking events by monitoring connection status through existing sensors without requiring user intervention. The system self-monitors the release button state, proximity sensor readings, or contact sensor status to autonomously determine when the vehicle is parked, eliminating the need for manual user input while maintaining operational simplicity.
Solution Approach 2:
The system implements feedback mechanisms where connection status sensors continuously monitor the relationship between the navigation device and vehicle. When sensors detect a change in connection status (e.g., release button pressed, proximity threshold exceeded), this feedback triggers automatic parking detection and position storage, creating a closed-loop system that maintains ease of operation through automated responses.
Data Source
Figure 1
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Figure 5
AI summary
The present invention relates to a navigation device comprising a processor unit (11). The navigation device (10) is arranged to detect parking of a vehicle, and, when parking is detected, determine information regarding the position of the parked vehicle. Next, the information regarding the position of the parked vehicle is stored. The stored information may be reused later to find the parked vehicle.