Current fingerprint extraction and device positioning method based on spin orbit coupling magnetic sensing

By using spin-orbit coupled magnetic sensing chip arrays and signal processing technology, the problem of device identification and positioning in complex environments using traditional NILM technology has been solved, achieving high-sensitivity and low-cost device identification and positioning, which is suitable for device management in complex power environments.

CN122131053APending Publication Date: 2026-06-02WUXI RUIZHI MICROELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WUXI RUIZHI MICROELECTRONICS CO LTD
Filing Date
2026-03-31
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Traditional NILM technology cannot distinguish specific devices and locations in complex environments with a large number of devices of the same model running in parallel. Existing magnetic sensor array solutions have low sensitivity and high cost, cannot decouple spatial and electrical dual fingerprints, and have high system redundancy costs.

Method used

A spin-orbit coupled magnetic sensing chip array is used to acquire three-dimensional magnetic field vector signals in real time. By combining signal conditioning and edge computing, and through a magnetic dipole inversion model and blind source separation algorithm, a three-dimensional enhanced current fingerprint vector is extracted to achieve equipment type identification and location positioning.

Benefits of technology

It improves the sensitivity and accuracy of device identification, enables individual differentiation of devices of the same model, reduces deployment costs, and is suitable for precise positioning in high-density integration and complex environments.

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Abstract

This invention discloses a method for current fingerprint extraction and device localization based on spin-orbit coupled magnetic sensing, comprising the following steps: S1: real-time acquisition of a three-dimensional magnetic field vector time series signal around the area to be measured; S2: generation of a three-dimensional enhanced current fingerprint vector containing spectral features, transient waveforms, and spatial vector information; S3: signal decoupling and spatial position inversion of multiple current sources in the mixed magnetic field signal to obtain the physical coordinates of each current source; and S4: matching the extracted three-dimensional enhanced current fingerprint vector with a pre-established device current fingerprint database. This invention's method for current fingerprint extraction and device localization based on spin-orbit coupled magnetic sensing solves the problems of insufficient sensitivity, inability to locate devices of the same model, and high deployment costs associated with traditional technologies.
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