AGV Radio Shadowing Navigation via Optical Markers
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Solution Overview
Problem
Conventional automated guided vehicles (AGVs) in factory settings are limited by fixed guidance tracks, unidirectional motion, and static collision avoidance, making them vulnerable to radio interference and restrictive in their movement and troubleshooting.
Innovation Solution
The implementation of transport vehicles equipped with 3D scanners, light field sensors, and WLAN antennas, allowing for dynamic path configuration, collision avoidance, and mobile WiFi hotspots to maintain uninterrupted communication and navigation even in environments with radio interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional AGVs use fixed guidance tracks (buried wires or reflective tape), then point-to-point movement control is achieved, but the system becomes vulnerable to radio interference and the tracks are physically fragile and unreliable
Solution Approach 1:
The patent replaces the mechanical guidance track system (buried wires or reflective tape) with an optical-mechanical sensor system. The AGV uses a 3D scanner to detect physical markers (code symbols) on the floor to determine its position and orientation, eliminating the need for continuous physical guidance tracks and reducing vulnerability to radio interference.
Solution Approach 2:
The patent uses optical copies (visual markers/code symbols) of position information instead of physical embedded tracks. The markers are visual representations of location data that the AGV reads optically, replacing the need for physical guidance infrastructure while maintaining reliable position determination.
2Ease of operation
If AGVs follow fixed guidance tracks, then motion control is achieved, but the freedom of movement is limited by physically defined paths
Solution Approach 1:
The patent transforms the static, fixed guidance track system into a dynamic system where the AGV can flexibly navigate between markers. The vehicle can adapt its path in real-time based on marker positions and environmental conditions, allowing dynamic route adjustment while maintaining operational simplicity through sensor-based guidance.
3Reliability
If AGVs use on-board proximity detection for collision avoidance, then collision prevention is achieved, but the vehicles can only move in one direction along the track
Solution Approach 1:
The patent replaces the mechanical track-based unidirectional guidance with an optical sensor system that reads markers. This allows the AGV to determine its position and orientation independently of track direction, enabling bidirectional movement and flexible routing while maintaining collision avoidance through the same 3D scanning system that detects markers and obstacles.
4Reliability
If static collision avoidance schemes are used with computer programs to examine AGV environment, then collision prevention is achieved, but the system is limited to closed paths and unidirectional motion
Solution Approach 1:
The patent implements dynamic path configuration where the AGV uses its 3D scanner to continuously detect markers and determine its position. The vehicle can dynamically adjust its route between markers based on real-time environmental assessment, enabling open-path navigation and bidirectional movement while maintaining collision avoidance through continuous environmental scanning and obstacle detection.
Data Source
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AI summary
Method for operating a transport vehicle for the interference-free transport of load racks in factory halls with radio interference, with partially autonomous driving operation, with the following features: a control center in a storage area with radio interference receives the order that a specific load rack (12) be transported to a specific destination; the control center determines which transport vehicle can complete the required order most quickly; a specific transport vehicle then receives the order from the control center to locate a specific load rack (12), pick it up and drive it to a specific storage location; for the corresponding communication to circumvent radio interference, one or more further transport vehicles are integrated by means of a corresponding transmitting and receiving device.The transport vehicle selected by the control center receives instructions from the control center regarding the route to be taken and the speed to be driven in each section of the route.