Backward Driving Assistant System Path Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems for assisting backward vehicle driving often deviate from the intended path due to differences in turning radius between forward and backward driving, leading to errors in path control, especially on narrow roads with obstacles.
Innovation Solution
An assistant system that uses real-time vehicle position information and obstacle sensing signals to generate and adjust a secondary backward path, incorporating wheel mark sensing and vehicle internal information for precise steering control, ensuring safe obstacle avoidance without path deviation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a backward path is generated only based on obstacle sensing signal, then the vehicle can avoid obstacles, but the vehicle may be excessively biased to left or right side of the backward path on wide roads
Solution Approach 1:
The patent combines map information (primary backward path) with obstacle sensing signals (secondary backward path adjustments) to generate the final backward driving path. This merging of multiple information sources resolves the contradiction by using map data to maintain proper lane positioning while using obstacle signals to ensure safety, preventing both excessive biasing on wide roads and collision on narrow roads.
Solution Approach 2:
The primary backward path generated from map information serves as an intermediary framework that guides the vehicle along the correct road trajectory, while the obstacle sensing signals act as adjustments to this intermediary path. This intermediary structure ensures the vehicle stays on the intended backward route without being excessively biased to either side, while still allowing obstacle avoidance when necessary.
2Ease of operation
If a backward path is made the same as forward driving path using drive trace data, then the path can be easily determined, but high error rate occurs due to different turning radius between forward and backward driving
Solution Approach 1:
Instead of simply reversing the forward driving path (which assumes symmetry), the patent generates a primary backward path from map information and then adjusts it based on actual obstacle sensing. This inversion of the approach—starting from map data rather than forward trace data—accounts for the different turning radius characteristics between forward and backward driving, eliminating the high error rate while maintaining ease of operation.
Solution Approach 2:
The patent changes the parameters used for path generation from forward driving trace data to map information combined with real-time obstacle sensing. This parameter change allows the system to account for the different turning radius of backward driving versus forward driving, improving path control accuracy while still providing easy path determination through automated processing.
3Manufacturing precision
If real-time position information and obstacle sensing signal are used to generate secondary backward path, then the vehicle can avoid obstacles without path deviation, but the system complexity increases
Solution Approach 1:
The patent segments the backward path generation into two distinct parts: a primary backward path from map information and a secondary backward path from obstacle sensing signals. This segmentation allows the system to process different types of information separately and combine them systematically, achieving high precision backward path control while managing system complexity through modular processing of position and obstacle data.
Data Source
AI summary
Provided are an assistant system and assistant method for a backward driving of a vehicle, wherein the assistant system includes an input unit configured to receive a backward driving assistant command, a position tracking unit configured to track real-time positions of the vehicle, an obstacle sensing unit configured to generate an obstacle sensing signal, a steering device manipulation unit configured to adjust a steering angle of a steering device of the vehicle, a primary backward path generation unit configured to generate a primary backward path, a secondary backward path generation unit configured to generate a secondary backward path for the vehicle to drive backward, and a control unit configured to match the real-time positions of the vehicle to the secondary backward path, and at the time of a backward driving, to control the steering device manipulation unit.