A method and device for detecting the state of opening and closing doors based on RFID

A detection device and detection method technology, which is applied in the direction of cooperative operation devices, instruments, calculations, etc., can solve the problems of inability to accurately judge the state of doors and windows, interference of electromagnetic induction devices, etc., achieve fast reading speed, strong anti-interference, and avoid The effect of shielding interference

Active Publication Date: 2019-11-12
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] In view of the defects of the prior art, the purpose of the present invention is to solve the technical problem that the existing door and window switch state detection system needs network support, and the electromagnetic induction device used may be interfered by artificial and false magnetic fields, and cannot accurately judge the door and window switch state

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  • A method and device for detecting the state of opening and closing doors based on RFID
  • A method and device for detecting the state of opening and closing doors based on RFID
  • A method and device for detecting the state of opening and closing doors based on RFID

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[0031]In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0032] RFID radio frequency identification is a communication technology that can identify specific targets through radio signals without contact, read and modify target data without mechanical or optical contact, and has strong anti-interference performance, fast reading speed, and reading ability strong features. The RFID system consists of RFID readers and RFID tags. The RFID tags can store a...

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Abstract

The invention discloses an RFID-based door opening / closing state detection method and device. The method comprises the following steps of: transmitting at least three induction signals through at least three radio-frequency identification labels; receiving at least one group of induction signals through at least one antenna, wherein each group of induction signals comprises at least three induction signals transmitted to a same antenna by at least three radio-frequency identification labels; determining at least one group of induction signal intensity data, wherein the intensity of each induction signal is decided by distance and angle between a radio-frequency label transmitting the induction signal and an antenna receiving the induction signal; and determining an opening / closing state of a door according to at least one group of induction signal intensity data and a pre-trained classifier. According to the method and device, the possibility that electromagnetic induction devices are replaced by other magnetic devices so that password locks mistakenly consider that doors are located in real closed state is avoided.

Description

technical field [0001] The invention belongs to the technical field of state detection, and more specifically relates to a method and device for detecting the state of opening and closing a door based on Radio Frequency Identification (RFID). Background technique [0002] In life, people always care about the switch status of doors and windows. In order to prevent the opening of doors and windows, leading to the theft of important items and property, a reminder alarm device is usually installed on the new smart doors and windows. In the Chinese invention patent CN201310434279, an intelligent door and window switch status monitoring system is disclosed. The system uses the principle that the distance between the induction magnet and the reed switch is different when the door and window are opened and closed, and the reed switch is affected by the magnetic field. Level conversion signal to detect the door and window switch status. Another utility model patent specification CN...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K17/00
CPCG06K17/00
Inventor 袁巍肖天赐李佳桓尤新革丁俊杰
Owner HUAZHONG UNIV OF SCI & TECH
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