Navigation Device Bypass Route Search Timing

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Solution Overview

Problem

Existing navigation systems fail to provide a suitable bypass route when a vehicle approaches a chargeable area, as they either cannot find a bypass route or retrieve a route that is too long, and do not allow users to decide on taking the bypass route at the appropriate time.

Innovation Solution

A navigation device that searches for a bypass route starting from a branch point on the recommended route before entering a chargeable area and presents it to the user only when near that branch point, allowing the user to choose the bypass route at the right time.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a bypass route is searched for after a vehicle approaches a chargeable area, then the navigation device can provide route guidance, but a suitable bypass route cannot be found or a very long bypass route is retrieved

Engineering Contradiction:

Improvebypass route availabilityVSAvoidroute search timing

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The navigation device searches for bypass routes in advance before the vehicle reaches the chargeable area, using predicted position information to determine when to retrieve and present bypass route information to the user. This preliminary action ensures that suitable bypass routes are available without causing unnecessary time loss.

Inventive Principle:

Principle #10Preliminary action

2Ease of operation

If a bypass route is retrieved before departure and used for guidance, then route guidance is provided, but the user cannot decide at the appropriate time whether to take the bypass route

Engineering Contradiction:

Improveuser decision flexibilityVSAvoidroute presentation timing

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The navigation device dynamically adjusts the presentation timing of bypass route information based on the vehicle's predicted position. The system presents bypass route information at an appropriate timing before the vehicle reaches the chargeable area, allowing users to make informed decisions about whether to take the bypass route based on their current situation.

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If the navigation device presents bypass route information too early, then the user has time to decide, but the user may not take the bypass route when needed

Engineering Contradiction:

Improveroute choice adaptabilityVSAvoidinformation presentation timing

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The navigation device uses feedback from the vehicle's actual position and speed to adjust the presentation timing of bypass route information. By continuously monitoring the vehicle's progress and comparing it with predicted position, the system optimizes when to present bypass route information to ensure the user makes a decision at the most appropriate moment.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS7634356B2Navigation device

Publication Date: 2009.12.15 NEONAV LLC

AI summary

When there is an area (chargeable area) that may be avoided, a suitable bypass route is presented with suitable timing. When a retrieved recommended route passes through an area (for example, a chargeable area) that may be avoided, a navigation device searches in advance for a bypass route that starts from a branch point (such as an intersection) on the recommended route before the area and bypasses the area without taking a long way around the area. The navigation device presents the recommended route before the area is approached, and presents the bypass route for the first time when the branch point becomes near.