Vehicle Positioning via Light Reception Pattern Matching
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Solution Overview
Problem
Existing positioning apparatuses for vehicles face challenges in accurately determining the position of a vehicle due to the presence of numerous similar measurement values in the database, leading to erroneous recognition of the vehicle's position.
Innovation Solution
A positioning apparatus that utilizes a light reception pattern acquisition unit to monitor changes in the strength of reflected light and compares these patterns with pre-recorded reference patterns in a database to estimate the vehicle's position, ensuring unique identification and accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If measurement values from sensors are used for positioning, then the positioning apparatus can operate with simple sensor data, but when numerous similar measurement values exist in the database, the positioning accuracy deteriorates and erroneous recognition occurs
Solution Approach 1:
The patent transforms the positioning approach by changing the parameter used for identification from simple sensor measurement values to light reception patterns. The light reception pattern is derived by monitoring changes in reflected light strength over time, converting static sensor data into dynamic temporal patterns that uniquely identify location sequences, thereby resolving the ambiguity caused by similar measurement values
Solution Approach 2:
The patent introduces light reception patterns as an intermediary between the sensor measurements and the database matching process. Instead of directly comparing sensor values with database entries, the system first converts sensor data into light reception patterns that capture the temporal sequence of light strength changes, serving as a unique mediator for accurate location identification
2Ease of operation
If simple sensor measurement values are used for positioning, then the system operation is simple, but the positioning accuracy deteriorates due to inability to select the correct measurement value from numerous similar values
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing light reception patterns in the database corresponding to known location sequences. Before actual positioning occurs, the system prepares reference patterns that represent expected light reception sequences at various locations, enabling accurate matching during operation without complex real-time processing
Solution Approach 2:
The system changes the operational parameter from direct sensor value comparison to light reception pattern matching. By monitoring the temporal changes in reflected light strength and converting them into distinctive patterns, the system maintains simple operation while achieving high positioning accuracy through unique pattern identification
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables more accurate vehicle positioning by using unique light reception patterns, reducing erroneous detections and improving positioning accuracy by calculating a reliability level based on the similarity between reference and measured trajectories.
Implementation Method 1
a light-receiving unit that receives the reflected light
Data Source
AI summary
A positioning apparatus is mounted to an own vehicle, and performs positioning of the own vehicle. The positioning apparatus acquires a light reception pattern. The light reception pattern indicates a pattern of a change in strength of reflected light in relation to a position of the own vehicle. The reflected light is obtained using a light wave for measurement that has been transmitted from the own vehicle. The positioning apparatus estimates a position of the own vehicle by referencing a database in which a reference pattern is recorded in advance, and by comparing the light reception pattern and the reference pattern. The reference pattern indicates a pattern in which a strength of reflected light is associated with each position in which a vehicle travels.