Automated Driving Path Guidance With Scaled Lane Spacing Data
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Solution Overview
Problem
Existing automated driving systems face challenges in ensuring quick, correct, and complete data transmission of driving instructions to auxiliary control devices, particularly when lane widths exceed the representable value range of limited bit width, limiting their operation to lanes with a predetermined maximum width.
Innovation Solution
The method involves scaling spacing values to fit within a limited bit width before transmission to the auxiliary control device and recalculating them back after transmission, ensuring the driving instruction is correctly and completely received, allowing operation in lanes of any width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If spacing values are transmitted with full precision, then measurement precision is improved, but data transmission bandwidth requirement increases
Solution Approach 1:
The patent changes the parameter of spacing values by scaling them to fit within a limited bit width (e.g., 8 bits) before transmission. This parameter transformation allows the auxiliary control device to represent lane spacing information within constrained bandwidth while maintaining operational accuracy through the scaling relationship between actual and represented values.
2Quantity of substance
If limited bit width is used for spacing values, then data transmission bandwidth is reduced, but measurement precision deteriorates
Solution Approach 1:
The main control device performs preliminary scaling of spacing values before transmission to the auxiliary control device. By pre-processing the data to fit within the limited bit width and establishing a scaling relationship, the system prepares the information in advance for accurate reconstruction at the receiving end, overcoming the precision limitation of constrained bandwidth.
Data Source
AI summary
A method for operating a vehicle in an automated driving operation involves a main control device determining a driving instruction and providing it to an auxiliary control device. The driving instruction includes information about a course of a path on which the vehicle should be guided into a stopping position, which is determined by a series of path points having a spacing value assigned to each path point. The spacing value corresponds to a spacing of the path point from left or right lane markings. Spacing values are transmitted to the auxiliary control device as digital data having a limited representable value range of the spacing values. The spacing values are reduced by scaling before the transmission to the auxiliary control device, and are calculated back in the auxiliary control device after the transmission if a lane width is greater than the representable value range of the spacing values.