PASSIVE WIRELESS MAGNETIC FIELD CHARACTERISTIC SENSING TAG AND SENSING SYSTEM

摘要

Disclosed are a passive wireless magnetic field characteristic sensing tag and sensing system and a passive wireless magnetic field characteristic sensing system-based magnetic field quantity acquisition method. Specifically, a passive resonant magnetic field sensor is used for integration in a board-level passive electronic tag, and an RFID technology-based magnetic field sensing system is built in cooperation with a reader-writer and a host computer to implement the highly precise and highly intelligent monitoring of the magnetic field quantity. By means of the design of the passive resonant magnetic field sensing tag that is compatible with single and dual sensor acquisition modes, the acquisition modes may be switched according to the control of the reader-writer, which solves the problems in which existing RFID technology-based small-scale magnetic field sensing systems have a single operation mode, the space for secondary development is small, and accuracy and sensitivity cannot be ensured. The solution of the present invention may monitor both a constant magnetic field and an alternating magnetic field, and is particularly suitable for magnetic field monitoring of power transmission devices in large power transmission centers.