RFID Insert Assembly With Ferromagnetic Layer for Signal Reliability
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Solution Overview
Problem
Current medical and dental ultrasonic devices face limitations in precision and safety due to mechanical energy, heat generation, and inadequate communication between inserts and medical devices, particularly in complex anatomical sites, and existing RFID solutions suffer from signal attenuation and size constraints.
Innovation Solution
An insert assembly with a miniaturized radiofrequency identifier and a handpiece antenna system that uses a ferromagnetic layer to reduce electromagnetic field attenuation, combined with a compact RFID system designed for biocompatibility and sterilization resistance, enabling effective wireless communication and maintaining device performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a radiofrequency identifier is added to the insert, then communication capability and traceability are improved, but the insert size and diameter increase
Solution Approach 1:
The RFID components (antenna and electronic tag) are nested within the insert structure. The antenna is wound around the insert shaft, and the electronic tag is positioned within the insert body, allowing the identification system to be integrated without significantly increasing the external dimensions of the insert.
Solution Approach 2:
The antenna is configured to extend along the longitudinal axis of the insert rather than radially outward, utilizing the length dimension of the insert to accommodate the RFID components without increasing the radial diameter that would interfere with surgical site access.
2Loss of information
If the insert diameter is increased to accommodate RFID components, then communication capability is improved, but the clinician's vision of the surgical site is obstructed
Solution Approach 1:
The RFID components are positioned in specific locations on the insert where they do not protrude into the surgical field. The antenna is wound around the shaft in a manner that keeps components confined to the insert body, ensuring the surgical site remains visible while maintaining RFID functionality.
3Reliability
If electromagnetic field strength is increased to improve RFID communication, then signal reliability is improved, but electromagnetic interference with medical equipment increases
Solution Approach 1:
A ferromagnetic layer is introduced as an intermediary between the RFID antenna and the surrounding environment. This layer serves as a shield that contains and directs the electromagnetic field, improving signal reliability for RFID communication while preventing electromagnetic interference with other medical equipment.
4Loss of information
If the insert is made more complex to include RFID system, then traceability and identification are improved, but manufacturing complexity increases
Solution Approach 1:
The RFID antenna and electronic tag are combined into a single integrated RFID assembly that is attached to the insert as one unit. This merging of components simplifies the manufacturing process by reducing the number of separate parts that need to be assembled and tested.
Solution Approach 2:
The insert design incorporates universal mounting features and standardized dimensions that allow the RFID system to be integrated into various insert types without requiring custom manufacturing for each application, thereby reducing overall manufacturing complexity.
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
The solution enhances patient safety by ensuring precise and efficient operation of ultrasonic devices, maintaining mechanical properties, and providing reliable RFID communication, even in challenging anatomical environments, while allowing for easy sterilization and traceability.
Implementation Method 1
a ferromagnetic layer (6), arranged on said insert metal tang (5), in which said ferromagnetic layer (6) is adapted to reduce or cancel attenuation and/or distortion phenomena of the electromagnetic field caused by field parasitic effects in the vicinity of the insert antenna (8) due to the interaction of a transmitted/received electromagnetic field with metal parts
Implementation Method 2
The operation of most ultrasonic power systems is based on the transmission of longitudinal waves in the application means. Such waves are generated by piezoelectric transducers
Data Source
AI summary
An insert assembly has an insert having an insert metal tang, and a radiofrequency identifier having a ferromagnetic layer in contact with the insert metal tang and including ferromagnetic material, a dielectric layer in contact with the ferromagnetic layer, an insert antenna in contact with the dielectric layer and having an insert antenna metal element extending along a planar profile for receiving and transmitting electromagnetic fields, and an identification chip operatively connected to the insert antenna for transmitting and receiving information about the insert assembly. The ferromagnetic layer reduces or cancels attenuation and/or distortion phenomena of electromagnetic fields. A transceiver device puts the identification chip in wireless communication with a handpiece antenna. The identification chip avoids protruding from a first or outer side of the planar profile. A part of the identification chip protrudes with a chip portion from a second or inner side of the insert antenna metal element. The chip portion is received in a chip seat.