Long-distance passive wireless magnetic field quantity sensing system

Abstract

The invention discloses a long-distance passive wireless magnetic field quantity sensing system and a method thereof. The method and the system are applied to the electronic communication technology and sensor technology field, and for the existing magnetic field quantity sensing, solve the problems that an existing magnetic field quantity sensing device is high in power consumption, large in size, high in cost, is difficult to maintain and the like are solved. The long-distance passive wireless magnetic field quantity sensing system is based on an RFID-based wireless communication technology,through a passive magnetic field sensor, and under the excitation of an excitation signal, outputs an output signal related to the surrounding magnetic field intensity, and adopts a rectification andenergy management circuit to convert the radio frequency energy sent by a reader-writer and received bya magnetic field quantity sensing label into the direct current electric energy and store, so that the energy for the magnetic field quantity sensing label during operation is provided. Compared with the prior art, the size of the magnetic field quantity sensing device is reduced, the productioncost is lower, the power consumption is smaller, the precision is high, and the remote wireless sensing can be achieved.

Description

technical field [0001] The invention belongs to the field of electronic communication technology and sensor technology, and in particular relates to an RFID radio frequency identification technology and a wireless sensor network technology. Background technique [0002] Radio Frequency Identification (RFID, Radio Frequency Identification) technology is a traditional wireless communication identification technology, which can realize non-line-of-sight communication, and is widely used in intelligent logistics, transportation, multi-target identification, azimuth tracking and other fields. The application of RFID technology in wireless sensor networks can combine the technical characteristics of RFID and wireless sensor networks. It can automatically identify the characteristics of targets through RFID radio frequency signals, and can simultaneously realize the functions of wireless sensor network sensing information and communication. [0003] RFID reader (abbreviation for Ra...

AI Technical Summary

Problems solved by technology

The main shortcomings of the existing magnetic field sensing technology are: no introduction of RFID technology, no long-distance wireless transmission of magnetic field parameters

Moreover, the existing magnetic field sensing devices generally have high power consumption, and basically operate in active mode, which puts forward certain requirements for fixed power sources or portable batteries, and also increases the cost of regular maintenance, and in some Or in the special environment where the battery cannot be replaced, the existing technology has shown considerable limitations

Moreover, the existing magnetic field sensing equipment is relatively bulky and expensive, and it is not realistic for a large-area sensor network layout

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