Fork-Mounted RFID Housing for Pallet Transponder Reading
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Solution Overview
Problem
Existing systems for managing pallets using RFID technology in industrial trucks are complex, prone to faults, and susceptible to interference due to separate components for communication and signal evaluation, which complicates the process and weakens the fork arms with integrated antennas.
Innovation Solution
A single box-shaped housing integrates all communication and evaluation components, including a reading and writing unit, transmitting and receiving circuit, and evaluation unit, attached to the underside of the load fork's traverse, with a transponder on each pallet, ensuring consistent distance and protection from interference, and a single connection cable to the on-board computer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If antennas are integrated into the fork arms for reading transponders, then the reading distance is shortened, but the fork arms are weakened and shielding limits antenna functionality
Solution Approach 1:
The antenna is extracted from the fork arm structure and relocated to a separate housing mounted on the load fork. This eliminates the weakening effect on the fork arm while maintaining the short reading distance advantage, as the antenna remains positioned close to the pallet transponder during operation.
Solution Approach 2:
A housing structure serves as an intermediary carrier for the antenna, separating it from the fork arm while maintaining its functional position. The housing is mounted on the load fork between the fork arms, allowing the antenna to remain close to the pallet for effective reading without compromising fork arm integrity.
2Adaptability or versatility
If separate devices are used for antenna signals and evaluation, then functionality is distributed, but the system becomes complex and susceptible to interference
Solution Approach 1:
The antenna, reading/writing unit, and evaluation unit are merged into a single integrated housing mounted on the load fork. This consolidation reduces system complexity, minimizes the number of connection cables required, and protects all components from interference while maintaining full functionality for transponder communication and signal evaluation.
3Length of stationary object
If multiple transponders are arranged on each pallet diagonally, then the distance between antenna and transponder is shortened, but at least two transponders are required per load carrier
Solution Approach 1:
The system is designed to dynamically adapt to a single transponder position on the pallet. The housing can be adjusted or positioned to maintain optimal reading distance regardless of the single transponder's location, eliminating the need for multiple fixed transponder arrangements while maintaining effective communication.
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 design simplifies the system, reduces fault susceptibility, and maintains antenna functionality by housing all electrical components in a single unit, allowing for efficient communication and evaluation of transponder signals with improved alignment and protection, thus enhancing the reliability of pallet identification and management.
Implementation Method 1
A receiver 24 is located centrally on the beam between the arms of the fork and is adapted to receive radio waves from transmitters on pallets or storage locations
Data Source
Figure 1
Figure 2~3
AI summary
The system has box shape housing with read and write units for communicating with transponders, and an evaluation unit for evaluation of signals of the transponders. The housing is attached to a lower side of a lower transverse beam of a support of a loading holder frame between holder frame arms. A single transponder (32) is attached to a front side of central blocks (26) of a pallet.