Autonomous Mobile Obstacle Avoidance Using Passage Clearance Boundaries
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Solution Overview
Problem
Autonomous mobile apparatuses often fail to avoid obstacles, particularly when higher-priority objects, like ambulances, enter their planned paths, leading to potential collisions.
Innovation Solution
The autonomous mobile apparatus is equipped with a system that includes a camera for acquiring passage clearance and computing distances to boundaries, determining if a safe clearance distance exists, and planning a new path to avoid collisions by setting a target boundary and controlling movement along that path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the autonomous mobile apparatus follows a planned path without additional detection systems, then the device complexity is reduced, but the reliability of collision avoidance deteriorates
Solution Approach 1:
The system performs preliminary detection of obstacles and pre-calculates alternative paths before a collision becomes inevitable. The camera continuously monitors the environment ahead, and the processor pre-computes avoidance routes when potential obstacles are detected, allowing the apparatus to smoothly transition to safety paths without reactive delays.
Solution Approach 2:
The system establishes a continuous feedback loop where the camera detects obstacles, the processor evaluates collision risk, and the movement controller adjusts the path in real-time. This closed-loop control ensures that the apparatus constantly adapts to changing environmental conditions, maintaining high reliability through ongoing monitoring and adjustment rather than static pre-planning.
2Reliability
If the autonomous mobile apparatus implements real-time obstacle detection and path recalculation, then the collision avoidance capability is improved, but the response time and processing duration increase
Solution Approach 1:
The processor maintains pre-computed alternative paths and safety routes in advance, so when an obstacle is detected, the system does not need to calculate from scratch. The camera is positioned to detect obstacles early, and the processor has ready-made avoidance strategies prepared, significantly reducing the time needed to respond to actual collision threats.
Solution Approach 2:
The system performs full path recalculation only when necessary, rather than continuously. The camera monitors the environment, and the processor intervenes with comprehensive path planning only when obstacle detection triggers a collision risk assessment. During normal operation, the system follows the pre-planned path without excessive processing, reducing time loss while maintaining detection accuracy.
3Adaptability or versatility
If the autonomous mobile apparatus uses a simple movement control system, then the device complexity is reduced, but the adaptability to dynamic obstacles deteriorates
Solution Approach 1:
The processor acts as an intermediary between the camera detection system and the movement controller. It receives obstacle information from the camera, determines whether objects have higher priority (such as emergency vehicles), and translates this into appropriate path adjustment commands for the movement controller. This intermediary layer provides sophisticated adaptability without requiring direct complex integration between all system components.
Solution Approach 2:
The control system is pre-programmed with priority rules and decision-making logic for different obstacle types. When the camera detects an object, the processor consults pre-established criteria to determine if the object has higher priority and requires path avoidance. This preliminary configuration of control logic enables high adaptability to various dynamic obstacles without requiring complex real-time decision algorithms.
Data Source
AI summary
A method for avoiding a collision between an autonomous mobile apparatus and a stationary or moving object initially deemed to be a collision threat includes acquiring a passage clearance of the object, from the point of view of the autonomous mobile apparatus, by establishing in two dimensions the nearest and the furthest physical parts of the object in the planned path of the autonomous mobile apparatus. Dimensions between the current position of the autonomous mobile apparatus and the at least two boundaries are computed as relative distances, and are considered as avoidance distances when the relative distances are greater than the passage clearance. For only one avoidance distance, a target boundary for clearance with safety is set based on the avoidance distance. The autonomous mobile apparatus moves along a specified direction to aim at the target boundary. An autonomous mobile apparatus applying the method is also disclosed.


