RFID and Magnetic Sensor Floor Navigation for AGV Positioning
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Solution Overview
Problem
Existing systems for maneuverable vehicles on floors lack effective navigation solutions, particularly in environments where precise positional and directional information is required without the need for complex navigation systems.
Innovation Solution
Integration of an RFID reading device connected to an antenna and permanent magnets on the floor, which generates a strong magnetic field for direction detection, combined with multiple RFID transponders and sensors like Hall-effect sensors, enables precise positional and directional information transmission through inductive coupling, allowing for navigation without additional navigation devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RFID transponders are used for position determination, then position information can be obtained, but orientation information cannot be determined
Solution Approach 1:
The system separates position determination (via RFID transponders) from orientation determination (via magnetic sensors detecting permanent magnets), allowing each function to be optimized independently while working together to provide complete spatial information
Solution Approach 2:
Permanent magnets are introduced as intermediary elements that generate magnetic fields detectable by the vehicle's magnetic sensors, enabling orientation determination without interfering with the RFID-based position determination system
2Measurement precision
If complex navigation systems are installed in the vehicle, then precise navigation is achieved, but system complexity and cost increase
Solution Approach 1:
The floor infrastructure provides navigation markers (RFID transponders and permanent magnets) that actively serve the vehicle's navigation needs, eliminating the need for complex active navigation systems in the vehicle itself
Solution Approach 2:
The system replaces complex mechanical/electronic navigation systems in the vehicle with a simpler sensor-based detection system that reads passive markers embedded in the floor, transferring the navigation intelligence to the infrastructure
3Measurement precision
If multiple RFID transponders are installed for precise positioning, then position accuracy improves, but system complexity and cost increase
Solution Approach 1:
The system combines RFID transponders and permanent magnets into integrated floor-mounted navigation markers, allowing both position and orientation information to be provided by co-located components rather than separate systems
Solution Approach 2:
The floor infrastructure is designed to serve multiple functions: RFID transponders provide position identification while permanent magnets provide orientation reference, and both can be implemented in the same floor structure
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution provides accurate positional and directional information, enabling vehicles to navigate effectively on floors with reduced errors and the ability to store and transmit data for multiple coupling regions, including driving instructions, using a simple and cost-effective setup.
Implementation Method 1
one or more permanent magnet(s) may be situated on the floor, in particular fixedly joined in the floor... the vehicle may have a sensor for detecting the direction of the magnetic field
Implementation Method 2
The sensor may include a Hall-effect sensor and/or a Wiegand sensor, especially such that the direction of the magnetic field crossing the sensitive area of the sensor is detectable
Implementation Method 3
the readout of data stored in a transponder with the aid of an RFID reading device is generally known... when antenna SL enters the coupling region of a floor-installed antenna, which is connected to a stationary RFID transponder
Data Source
AI summary
A system, especially an installation, having a vehicle which is maneuverable on a floor is described. The vehicle has an RFID reading device which is connected to an antenna SL, and when the antenna SL enters the coupling region of a floor-installed antenna connected to a stationary RFID transponder, especially an RFID tag, then data stored in the transponder are able to be read out by the reading device. One or more permanent magnet(s) is/are situated on the floor, in particular fixedly joined in the floor, and the vehicle includes a sensor for detecting the direction of the magnetic field.