LiDAR White Line Positioning With Reliability-Weighted Estimation
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Solution Overview
Problem
The accuracy of estimating a vehicle's position using LiDAR data from white lines is affected by the type and condition of the lines, leading to varying detection accuracy due to differences in data quantity, which impacts the reliability of the position estimation.
Innovation Solution
A measurement device and method that calculates the reliability of positional information based on the number of points or sets of points within a predetermined range, weighting the accuracy of white line center positions according to the ratio of actual to ideal scan data, and using this reliability to adjust the estimation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple measurement devices are used to measure different parameters (temperature, humidity, illuminance), then measurement capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent applies universality by integrating multiple measurement functions (temperature, humidity, illuminance) into a single measurement device. The device includes multiple sensors (temperature sensor, humidity sensor, illuminance sensor) that can measure different environmental parameters simultaneously, eliminating the need for separate measurement devices for each parameter and reducing overall system complexity.
Solution Approach 2:
The patent combines multiple measurement functions into one integrated device. The measurement device merges temperature measurement, humidity measurement, and illuminance measurement capabilities into a single unit with unified control and processing, reducing the number of separate devices needed and simplifying the measurement system.
2Ease of manufacture
If measurement devices are disposed of after use, then ease of manufacture and initial cost are improved, but long-term cost and resource waste increase
Solution Approach 1:
The patent implements discarding and recovering by enabling the recovery and reuse of measurement devices. The system allows measurement devices to be collected, refurbished, and redeployed for continued use. This extends the lifecycle of measurement devices, reducing waste and the need for continuous manufacturing of new devices while maintaining measurement capabilities.
3Productivity
If measurement devices are shared among multiple users, then resource utilization is improved, but measurement precision and reliability decrease
Solution Approach 1:
The patent applies feedback by implementing a management system that tracks the usage history, calibration status, and measurement quality of shared measurement devices. The system provides feedback to users and administrators about device performance, enabling informed decisions about device allocation, calibration scheduling, and maintenance. This ensures that shared devices maintain measurement precision while being utilized by multiple users.
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 enhances the accuracy of vehicle position estimation by considering the reliability of the white line data, reducing the impact of low-reliability data and improving overall estimation precision.
Implementation Method 1
Patent Reference 2 discloses a technique of transmitting an electromagnetic wave to a road surface and detecting white lines based on its reflectivity
Data Source
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Figure 3A~3B
AI summary
The measurement device acquires positional information of a measurement object stored in a storage unit, and acquires point group information of points indicating a surrounding feature acquired by an external sensor. Then, the measurement device calculates the positional information indicating a predetermined position of the measurement object existing in a predetermined range based on the point group information existing in the predetermined range, and outputs its reliability.