Navigation Device Intersection Guidance Using Landmark Position
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Solution Overview
Problem
Conventional navigation devices fail to effectively guide drivers on right or left turns due to the lack of consideration for the positional relationship between intersections and distinctive objects, making it difficult for drivers to identify the correct intersection for guidance.
Innovation Solution
A navigation device that includes a target candidate extracting unit, a target determining unit, a guidance sentence generating unit, and a sound output unit, which extracts and determines suitable targets along the route based on positional relationships with the target intersection, generating voice guidance to help drivers identify the correct intersection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional navigation devices provide route guidance without considering positional relationships between intersections and distinctive objects, then the guidance system is simple to implement, but drivers cannot easily identify the correct intersection for guidance
Solution Approach 1:
The patent introduces distinctive objects (such as buildings, landmarks, or other recognizable features) as intermediary reference points between the navigation system and the driver. These objects serve as mediators that bridge the gap between abstract directional instructions and the driver's visual perception, making it easier to identify the correct intersection without significantly complicating the system architecture
Solution Approach 2:
The patent adds a spatial dimension to guidance by incorporating the positional relationships between intersections and distinctive objects. Instead of providing only directional information, the system utilizes the two-dimensional spatial arrangement of objects relative to intersections, creating a more intuitive reference framework for drivers to locate guidance points
2Loss of information
If the navigation device does not notify drivers of positional relationships between targets and intersections, then the guidance information is simple to generate, but drivers cannot easily identify the target intersection
Solution Approach 1:
The patent performs preliminary determination of suitable distinctive objects and their positional relationships with target intersections before providing guidance. The system pre-processes map data and object locations to identify and store relevant positional information, so that when guidance is needed, the information is already prepared and readily available, minimizing real-time processing complexity
Solution Approach 2:
The patent extracts only the essential positional relationship information between distinctive objects and target intersections from the complete set of available data. By selectively extracting and presenting only the most relevant positional information needed for guidance, the system reduces information overload while maintaining effectiveness
Data Source
AI summary
Disclosed is a navigation device including: a target candidate extracting unit for extracting target candidates located along a guidance route from a map database on a basis of a vehicle position, the guidance route, and intersection information about a target intersection for guidance; a target determining unit for determining a target on a basis of knowledge about target determination from among the target candidates extracted by the target candidate extracting unit; a guidance sentence generating unit for generating a guidance sentence by using the target determined by the target determining unit; and a sound output unit for outputting voice guidance on a basis of the guidance sentence generated by the guidance sentence generating unit.