Electrified Highway Positioning via Contact-Line Coordinates
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Solution Overview
Problem
Current vehicle positioning technologies, such as GNSS and LiDAR, face challenges in accuracy and cost, especially in environments with dense buildings or tunnels, and existing vehicle-road cooperation methods have inconsistent communication protocols and accuracy issues due to communication quality.
Innovation Solution
A vehicle-road cooperation precise positioning method using a roadside bracket, positioning module, and communication line on electrified highways, where the roadside module measures its own position, determines absolute coordinates, and calculates the vehicle's mass center position through a conversion algorithm based on contact signals and system parameters, eliminating satellite reliance and enhancing timeliness and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GNSS positioning technology is used, then the vehicle can obtain global absolute positioning, but the positioning accuracy deteriorates significantly in environments with dense buildings, obstructions, and tunnels
Solution Approach 1:
The patent introduces an electrified highway infrastructure (communication line and roadside positioning modules) as an intermediary between the vehicle and the positioning system. This intermediary provides a wired communication path that bypasses the need for satellite signals, enabling accurate positioning in environments where GNSS is blocked by buildings, obstructions, or tunnels.
Solution Approach 2:
The electrified highway infrastructure serves multiple functions: it provides both power transmission through the pantograph and positioning information through the communication line. This multi-functionality allows the same infrastructure to support both energy supply and precise positioning, eliminating the need for separate satellite-based positioning systems.
2Measurement precision
If differential GNSS positioning technology is used to achieve lane-level positioning accuracy, then positioning precision improves, but communication quality and stability deteriorate
Solution Approach 1:
The patent replaces the wireless communication system (which is susceptible to interference and instability) with a wired mechanical connection through the pantograph. The communication line provides a physical, stable connection between the roadside infrastructure and the vehicle, eliminating communication quality issues while maintaining lane-level positioning accuracy.
3Measurement precision
If LiDAR device is equipped for vehicle positioning, then positioning accuracy improves, but the cost of the vehicle increases
Solution Approach 1:
The patent enables the electrified highway infrastructure to provide positioning services to vehicles without requiring expensive LiDAR equipment on each vehicle. The roadside positioning modules and communication line work together to deliver accurate positioning information, allowing vehicles to use low-cost onboard receivers instead of expensive active sensing devices.
4Measurement precision
If vehicle-road cooperation multi-point ranging is used, then positioning capability improves, but device complexity increases due to inconsistent communication protocols
Solution Approach 1:
The patent establishes a unified communication protocol between the vehicle-mounted terminal and the roadside base stations through the electrified highway infrastructure. This homogeneous communication standard eliminates the protocol inconsistency problems that plague general vehicle-road cooperation systems, simplifying the system while maintaining multi-point ranging capabilities for accurate positioning.
Data Source
AI summary
A vehicle-road cooperation precise positioning method based on an electrified highway includes measuring position information of its own positioning point by using a roadside positioning module; determining absolute coordinates of all points on a communication line according to the position information; acquiring a contact signal when a vehicle-road connection information system comes into contact with the communication line, and determining position information of a contact point according to the contact signal and the absolute coordinates; and based on a conversion algorithm, determining current vehicle mass center position coordinate information according to the position information of the contact point and parameter information of the vehicle-road connection information system. In the process of real-time acquisition of vehicle dynamic position information, the method does not rely on a satellite positioning system at all and is based on a wired vehicle-road connection of the electrified highway, so that timeliness and reliability are higher.