RFID Tag Layout for Industrial Vehicle Direction and Position Control
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Solution Overview
Problem
Existing industrial vehicle control systems lack efficient methods for navigating and operating within complex industrial facilities using radio frequency identification tags, particularly in managing vehicle functionality and positional data to optimize operations and ensure safe navigation.
Innovation Solution
A tag layout is implemented in industrial facilities comprising double rows of tags arranged in an n × m matrix, with inner and outer rows configured for successive detection, and tag pairs with varying spacings to manage vehicle functionality and positional data, allowing for dynamic control of vehicle operations such as speed and height adjustments based on tag identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single row of tags is used for vehicle navigation, then the device complexity is reduced, but the measurement precision of vehicle position and the reliability of navigation are insufficient
Solution Approach 1:
The tag layout is segmented into multiple rows (first row, second row, third row) with different configurations. Each row serves specific navigation functions: the first row detects aisle entry, the second row provides continuous position tracking, and the third row detects aisle exit. This segmentation improves measurement precision by distributing detection functions across multiple tag rows rather than relying on a single row.
2Adaptability or versatility
If uniform tag spacing is used throughout the facility, then the manufacturing and installation process is simplified, but the ability to adapt to different operational zones and vehicle functions is reduced
Solution Approach 1:
Different tag spacings are applied to different operational zones based on local requirements. The first row uses spacing optimized for aisle entry detection, the second row uses spacing for continuous position tracking, and the third row uses spacing for exit detection. This local quality approach allows each tag row to be optimized for its specific function while maintaining overall system adaptability to different operational zones.
3Measurement precision
If tags are densely spaced to improve position detection accuracy, then the measurement precision increases, but the quantity of tags and installation complexity increase
Solution Approach 1:
The system dynamically determines vehicle position by processing detection data from multiple tag rows with different spacings. Rather than requiring uniformly dense tags throughout, the system adapts its position calculation based on which tags are detected and their known positions, optimizing the balance between precision and tag quantity.
4Productivity
If the vehicle travels at high speed to improve productivity, then the productivity increases, but the safety of navigation and operation decreases
Solution Approach 1:
The system continuously receives detection data from multiple tag rows and provides real-time feedback on vehicle position and detected zones. This feedback loop allows the vehicle control system to adjust speed and navigation based on current position accuracy and detected environmental features, maintaining safety even at higher operating speeds by dynamically adapting to detected conditions.
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
Enhances operational efficiency and safety by dynamically controlling industrial vehicle functions like speed and height based on tag detection, ensuring safe navigation and optimized operation within industrial environments.
Implementation Method 1
a sensor mounted on the industrial vehicle and configured to identify individual tags of the tag layout
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
Industrial vehicle comprising storage and retrieval hardware, a tag reader, a reader module, and a vehicle controller. The storage and retrieval hardware is configured to store and retrieve items from selected storage elements positioned along an aisle path, and the tag reader and the reader module cooperate to identify individual tags along the aisle path. The tag reader comprises two read antennas positioned on opposite sides of a longitudinal travel axis of the industrial vehicle, and the read antennas define respective read ranges and generate respective tag read signals when tags enter the respective read ranges of the read antennas. The tag reader and the reader module further cooperate to generate a vehicle direction signal when the individual tags are identified primarily with reference to tag read signals from only one of the two read antennas. The vehicle controller controls operational functions of the storage and retrieval hardware partially as a function of the vehicle direction signal.