Navigation Device Route Harmonization via Preliminary Path Setting
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Solution Overview
Problem
Conventional navigation devices often fail to harmonize routes set by a navigation server with independently set routes, leading to abrupt behavior changes in mobile bodies during navigation, which can disrupt smooth guidance to a destination.
Innovation Solution
A navigation device that communicates with a navigation server to set and output a second navigation route, which includes a part of the first navigation route as a terminal point, ensuring smooth transition without abrupt changes, by using a first processing unit to recognize departure and destination positions and a second processing unit to recognize individual links constituting a support route, allowing for harmonization of routes from both sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the navigation device sets a navigation route independently without considering the server-set route, then the navigation response speed is improved, but the route harmonization deteriorates causing abrupt behavior changes
Solution Approach 1:
The navigation device preliminarily sets a first navigation route independently before receiving server route information. When server route information is subsequently received, the device merges the server-set route with the preliminarily set route, ensuring smooth transition without abrupt changes. This preliminary action allows the system to maintain fast response while achieving route harmonization.
Solution Approach 2:
The navigation device merges the first navigation route (independently set) with the second navigation route (server-set) by identifying overlapping sections and seamlessly combining them. The device determines a merging point where the two routes converge and integrates them into a unified navigation path, eliminating abrupt behavior changes while maintaining both responsiveness and harmonization.
2Stability of the object's composition
If the navigation device immediately switches to the server-set route when received, then the route harmonization is improved, but the navigation smoothness deteriorates due to abrupt behavior changes
Solution Approach 1:
The navigation device preliminarily establishes a first navigation route before receiving server route information. When the server-set route is received, the device uses this preliminary route as a baseline for merging, allowing gradual transition rather than immediate switching. This maintains navigation smoothness while achieving route harmonization.
Solution Approach 2:
The navigation device dynamically adjusts the route transition based on the mobile body's current state and position. Instead of immediate switching, the device determines an appropriate transition point and smoothly transitions from the first route to the merged route, adapting the switching timing to maintain navigation smoothness while incorporating server-set route harmonization.
3Productivity
If the navigation device sets routes without considering the mobile body's current position and movement, then the route setting speed is improved, but the guidance accuracy deteriorates
Solution Approach 1:
The navigation device performs preliminary route setting based on the mobile body's current position and movement state before receiving server route information. This preliminary action ensures the route is accurately tailored to the mobile body's actual state, maintaining guidance accuracy while enabling fast route setting. The device then merges server routes with this position-aware preliminary route.
Solution Approach 2:
The navigation device applies local quality by tailoring the route characteristics to the mobile body's specific current position and movement state. Instead of using generic routes, the device adjusts the route parameters locally based on the mobile body's real-time state, ensuring high guidance accuracy while maintaining efficient route setting speed through the merging process.
Data Source
AI summary
A navigation device and the like capable of harmonizing a navigation route for guiding a mobile body set on the basis of a support route search result by a navigation server and a navigation route for also guiding the mobile body set independently of the navigation route, from a view point of guiding the mobile body smoothly. In the case where the second navigation route r2 is set in the condition where the first navigation route r1 is set, the second navigation route r2 is set and output so as to include a part dr1 of the first navigation route r1 which takes a position departing from the current position pt of the automobile 2 by a first distance d1. Therefore, even in the case where the second navigation route r2 is set and output at the navigation device 200 during the time when the automobile 2 is traveling according to the first navigation route r1 output at the navigation device 200, it is possible to guide the automobile 2 according to the original first navigation route r1 until the position departing from the current position pt of the automobile 2 by the first distance d1. Therefore, it becomes possible to guide the automobile 2 smoothly to the destination position p2, without forcing the automobile 2 to perform abrupt behavior change.