Multi-Directional RFID Detection for Industrial Safety Locks
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Solution Overview
Problem
Industrial safety locks face challenges in accommodating multiple directions of approach for locking tongues without requiring rotation of the locking switch or its components, leading to installation complexities and potential safety hazards during validation processes.
Innovation Solution
The design incorporates multiple RFID coils in the locking switch head, allowing detection of an RFID tag on the locking tongue from three orthogonal directions without rotating the head or switch, along with validation circuitry that confirms bolt detection without actuating the locking bolt, ensuring safe and reliable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple RFID coils are installed to detect locking tongue from three orthogonal directions, then installation flexibility and detection capability are improved, but device complexity increases
Solution Approach 1:
The patent applies dimensionality change by arranging RFID coils in three orthogonal directions (x, y, z axes) to detect the locking tongue from multiple spatial dimensions. This allows the system to detect the tongue's position regardless of its orientation or approach direction, significantly improving adaptability without requiring mechanical rotation of the switch head.
Solution Approach 2:
The multiple RFID coils are designed to serve a universal detection function across all three orthogonal directions. Each coil can detect the locking tongue's presence and position from its specific orientation, and the system integrates these detections to provide comprehensive multi-directional detection capability, making the locking switch universally adaptable to various installation scenarios.
2Reliability
If validation circuitry is added to confirm bolt detection without actuating the locking bolt, then safety is improved, but device complexity increases
Solution Approach 1:
The validation circuitry acts as an intermediary between the RFID detection system and the bolt actuation mechanism. It receives detection signals from the RFID coils, processes them to confirm proper tongue insertion and positioning, and only then permits bolt actuation. This intermediary layer ensures safety by validating correct assembly before enabling the locking function, preventing premature or incorrect bolt engagement.
3Ease of operation
If the locking switch head is not rotated to accommodate different approach directions, then ease of installation is improved, but the ability to detect locking tongue from various directions deteriorates
Solution Approach 1:
Instead of rotating the switch head mechanically to accommodate different approach directions, the patent uses three orthogonal RFID coils to detect the locking tongue from multiple spatial dimensions simultaneously. This allows the fixed switch head to maintain ease of installation while achieving multi-directional detection capability through the three-dimensional coil arrangement.
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 enhances installation flexibility and safety by enabling detection of the locking tongue from various directions and validating bolt position without interrupting the switch's operation, thus improving the robustness and reliability of industrial safety locks.
Implementation Method 1
The RFID tag may comprise a passive RFID component for storing data, such as calibration data, expiry date, type of tests, and for transmitting data to a reader comprised in the system
Data Source
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AI summary
A tag retention assembly is designed to mount a radio frequency identification (RFID) tag or other type of electronic component to a locking tongue so that a corresponding industrial locking switch can detect entry of the tongue before advancing the switch's locking bolt. The assembly comprises a main housing configured to hold the RFID tag, and a cover configured to engage with the housing to enclose the RFID tag. When the cover is engaged with the housing through a tag retention hole formed in the locking tongue the assembly and the RFID tag are held in place on the tongue.