Buried RFID tag mutual inductance evaluation method based on dumbbell-shaped magnetic core

By establishing a three-dimensional simulation model and fitting magnetic induction strength, and establishing a mutual induction evaluation model for dumbbell magnetic cores, the problem of insufficient accuracy and adaptability of the mutual induction evaluation of buried RFID tags in the existing technology is solved, and higher accuracy and adaptability are achieved, which is suitable for performance optimization.

CN119720547AActive Publication Date: 2025-03-28SOUTHWEST PETROLEUM UNIV +1
2 Cites 0 Cited by

Patent Information

Application Number
CN202411804068.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-10
Publication Date
2025-03-28
Estimated Expiration
2044-12-10

AI Technical Summary

Technical Problem

The prior art is difficult to accurately evaluate the mutual inductance of buried RFID tags in dumbbell cores, especially when compared with traditional cylindrical cores, and lack of applicable calculation methods, resulting in insufficient calculation errors and adaptability.

Method used

By establishing a three-dimensional simulation model of dumbbell-type magnetic core and cylindrical magnetic core, applying a magnetic field for numerical simulation, comparing and fitting the magnetic induction intensity, establishing a mutual induction evaluation model of dumbbell-type magnetic core, and then performing mutual induction evaluation.

Benefits of technology

This method improves the accuracy and adaptability of the mutual inductance evaluation of dumbbell-type magnetic core buried RFID tags, avoids cumbersome elliptical integral calculations, and provides a simple algebraic analytical formula, which is suitable for performance optimization of dumbbell-type ferrite RFID antennas.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention discloses a buried RFID tag mutual inductance evaluation method based on a dumbbell-shaped magnetic core, and belongs to the field of RFID, and the method comprises the following steps: S1, building a three-dimensional simulation model of the dumbbell-shaped magnetic core and a cylindrical magnetic core; s2, magnetic fields are applied to the same positions of the three-dimensional simulation models of the dumbbell-shaped magnetic core and the cylindrical magnetic core respectively, numerical simulation is carried out, and the magnetic induction intensity of the dumbbell-shaped magnetic core and the magnetic induction intensity of the cylindrical magnetic core are obtained respectively; s3, the magnetic induction intensity of the dumbbell-shaped magnetic core and the magnetic induction intensity of the cylindrical magnetic core are compared and fitted; s4, establishing a buried RFID tag mutual inductance evaluation model of the dumbbell-shaped magnetic core according to the fitting condition in the step S3; and S5, according to the mutual inductance evaluation model in the step S4, the mutual inductance condition of the buried RFID tag is evaluated, and the method has higher adaptability and higher accuracy for mutual inductance prediction of the dumbbell-shaped buried RFID tag.
Need to check novelty before this filing date? Find Prior Art