Navigation System One-Touch Map Matching Correction for Parallel Roads
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Solution Overview
Problem
Conventional navigation systems face errors in map matching when multiple parallel roads are present, leading to erroneous path searches and guidance, confusing users by displaying incorrect routes.
Innovation Solution
A navigation system with a one-touch map matching correction function, utilizing a GPS module, map database, storage unit, display unit, and controller to index and display candidate roads, allowing users to sequentially correct their position by pressing a map-matching correction button, thereby reducing errors in parallel road scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional map matching method is used to correct GPS position errors, then position accuracy is improved, but erroneous map matching to neighboring parallel roads occurs
Solution Approach 1:
The patent introduces an intermediary selection mechanism between GPS position correction and final map matching. When multiple parallel roads are detected within a predetermined distance, the system presents candidate roads to the user and waits for manual selection, rather than automatically selecting one. This intermediary step prevents erroneous automatic selection while maintaining position accuracy correction.
Solution Approach 2:
The system implements feedback by detecting the presence of multiple parallel roads and responding by changing the map matching mode. When multiple candidates are found, the system activates a selection interface that provides feedback to the user about available options, allowing the user to confirm or correct the selected road. This feedback loop prevents erroneous matching by involving user verification.
2Productivity
If automatic map matching correction is performed, then operation speed is improved, but user confusion occurs due to erroneous path search and guidance
Solution Approach 1:
The patent applies dynamics by making the map matching process adaptive rather than static. The system automatically performs fast map matching when only one road candidate exists, but dynamically switches to a manual selection mode when multiple parallel roads are detected. This dynamic adjustment maintains operation speed in simple cases while preventing user confusion in complex scenarios.
Solution Approach 2:
The system performs preliminary detection of multiple parallel roads before executing map matching correction. By identifying the presence of multiple candidates in advance, the system can prepare the selection interface and prevent erroneous automatic correction, allowing users to make informed selections without confusion.
3Ease of operation
If map matching correction button is always active, then ease of correction is improved, but unnecessary corrections occur on single road scenarios
Solution Approach 1:
The patent applies local quality by making the map matching correction button's activation state location-dependent. The button is activated only in specific locations where multiple parallel roads are detected within a predetermined distance, rather than being universally active. This selective activation prevents unnecessary corrections on single-road scenarios while maintaining ease of correction where needed.
Solution Approach 2:
The system changes the operational parameter of the correction button based on the local road environment. When multiple parallel roads are detected, the button transitions from an inactive or auto-correct state to an active manual selection state. This parameter change ensures corrections are only performed when necessary, improving reliability while maintaining ease of operation.
Data Source
AI summary
A navigation system with a function of one-touch map matching correction, and a method thereof. The navigation system includes a GPS module for receiving each position signal, and measuring self position and driving direction; a map database for storing map data; a storage unit for storing a candidate designation index, road information, a guidance stop flag, a flag activating a map-matching correction button, and voice data for road sequence guidance; a display unit for displaying the map data, activating or deactivating the map-matching correction button, and generating a coordinate value of a position; and a controller for indexing the parallel roads, generating a candidate road array, activating the map-matching correction button, and sequentially selecting candidate roads while performing the map matching correction.