Point Cloud Data Acquisition Using Road Markers
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Solution Overview
Problem
The accuracy of three-dimensional maps generated from point cloud data is compromised if the laser scanner and camera are not positionally aligned with high accuracy during data acquisition.
Innovation Solution
A method and system that acquire point cloud data by incorporating a marker detection process to link positional information with the data, using magnetic markers laid on the road, ensuring precise alignment and recording of point cloud data with marker reference information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If marker detection process is added to link positional information with point cloud data, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent introduces markers as intermediary objects placed on the road surface to serve as reference points. These markers act as mediators between the mobile mapping system and the road environment, enabling precise positional identification without requiring complex alignment between multiple sensors. The markers provide a simple yet effective reference framework that improves measurement precision while avoiding the complexity of sophisticated sensor calibration systems.
2Manufacturing precision
If high-accuracy positional alignment between laser scanner and camera is achieved through marker reference, then manufacturing precision is improved, but ease of manufacture deteriorates
Solution Approach 1:
The system performs self-alignment and self-calibration by automatically detecting markers in the environment and using them as reference points. The mobile mapping system autonomously identifies its position relative to known marker locations, eliminating the need for manual alignment procedures during installation. This self-service approach achieves high manufacturing precision while maintaining ease of manufacture, as the system automatically corrects its own positioning without requiring complex installation procedures.
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 allows for the creation of high-accuracy three-dimensional maps by accurately identifying the acquisition position of point cloud data, enhancing the precision of the map generation process.
Implementation Method 1
a laser scanner which measures a distance to a target subject by utilizing reflection time of laser light
Implementation Method 2
a marker detection process of detecting a marker laid in or on a traveling road of the vehicle
Data Source
AI summary
A point cloud data acquiring system (1) is a system which acquires, as moving, point cloud data which serves as base data for a three-dimensional map representing a traveling environment of a vehicle includes range finding part (31) which acquires point cloud data representing azimuths and distances to planimetric features configuring the traveling environment, marker detecting part (2) which detects marker (10) laid in or on a traveling road of the vehicle, and a data recording part which records point cloud data acquired by range finding part (31) as linking thereto marker reference information including positional information with reference to any marker (10).