RFID Safety Switch Actuator Alignment Without Read-Range Loss
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Solution Overview
Problem
The deflection of the actuator in existing safety switch arrangements can change the position of the transponder relative to the RFID reader, causing it to be out of reading range and preventing effective locking control.
Innovation Solution
A safety switch arrangement with a mechanical coupling means connecting the actuating element to the transponder, allowing movements to be transmitted directly, ensuring the transponder remains within the reading range of the RFID reader even with compensating movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the actuator is deflected to align with the locking unit, then automatic alignment is achieved, but the transponder position changes relative to the RFID reader
Solution Approach 1:
The actuator is divided into two independent parts: the actuating element that performs the locking function and the transponder that maintains its position. This segmentation allows the actuating element to deflect for alignment while the transponder remains stationary relative to the RFID reader, eliminating the position change problem.
Solution Approach 2:
A coupling element is introduced as an intermediary between the actuating element and the transponder. This coupling element transmits the movement from the actuating element to lock the safety door while preventing the transponder from moving out of the RFID reader's reading range.
2Adaptability or versatility
If the actuator head has a larger cross-section than the connecting element, then automatic alignment is enabled, but the transponder may move out of reading range during deflection
Solution Approach 1:
The actuator is segmented into the actuating element with larger cross-section for alignment and the separately mounted transponder, allowing the alignment function without compromising transponder position stability.
Solution Approach 2:
The transponder is pre-positioned on the actuator head in a location that remains within the RFID reader's reading range even when the actuating element deflects. This preliminary positioning ensures reliable reading before the locking action occurs.
3Ease of operation
If the actuator is retracted into a recess in the safety switch, then locking is achieved, but the transponder position relative to the RFID reader changes
Solution Approach 1:
By separating the transponder mounting from the actuating element's movement path, the transponder remains in a stable position within the RFID reader's range while the actuating element retracts to achieve locking.
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
Ensures reliable locking control by maintaining transponder readability, enhancing the safety switch's functional reliability by compensating for assembly tolerances and misalignments.
Implementation Method 1
This locking is controlled by an RFID reader in the safety switch detecting a transponder in the actuator
Data Source
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AI summary
The invention relates to a safety switch arrangement (1) comprising a safety switch (2) having a reading unit (5) and an actuator (3, 8) which has a transponder (7) and a movable actuating element (9). Signals are read from the transponder (7) by the reading unit (5) when the transponder (7) is within a reading range of the reading unit (5). The actuating element (9) is connected to the transponder (7) via a mechanical coupling means (14), so that movement of the actuating element (9) is transmitted to the transponder (7), such that in a locked position of the actuating element (9) the transponder is within the reading range of the reading unit (5).