Method for judging location of transponder
A technology of transponder and orientation, applied in the field of identification, can solve the problems of hidden safety hazards, cumbersome, unable to identify whether the key is inside or outside the door, etc., and achieves the effect of reliable performance, simple operation and improved safety.
Inactive Publication Date: 2015-05-20
福建省天鼎电子技术有限公司
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Problems solved by technology
[0002] At present, the opening of the door lock is mainly done by inserting the mechanical key into the door lock. A door lock system used to replace the traditional mechanical key to control the door lock switch, and realize the control of the door lock through wireless communication; but the existing keyless entry system cannot identify whether the key is inside or outside the door, if The key is outside the door or within the effective distance of the door, and other people can unlock and enter the room by triggering the power-on device outside the door, which poses a great security risk
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[0011] The two sets of transmitting antennas of the present invention are the L1 transmitting antenna and the L2 transmitting antenna; the L1 transmitting antenna and the L2 transmitting antenna can be staggered and distributed on the same circuit board; they can also be respectively arranged on different circuit boards, and the L1 There is a certain distance between the transmitting antenna and the L2 transmitting antenna.
[0012] The present invention judges the position of the transponder device by the difference between the signal strength and phase sent by the L1 transmitting antenna and the L2 transmitting antenna; if the transponder device is close to the L1 transmitting antenna, the L1 transmitting The signal sent by the antenna is stronger than the signal sent by the L2 transmitting antenna. On the contrary, if the transponder device is close to the transmitting L2 transmitting antenna, the signal sent by the L2 transmitting antenna received by the front-end receiving...
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The invention discloses a method for judging location of a transponder. In the method, an emitting device, two emitting antennas and a transponder device are mainly included. The two emitting antennas can respectively emit signals with certain frequency and codes, the transponder device receives the signals, and the location of the transponder device can be judged according to different strength of signal amplitude and signal phase difference generated according to different distances between the two emitting antennas and the transponder device. The method for judging location of the transponder has the advantages of simple structure, practicality, convenience and capability of identifying specific location of the transponder.
Description
technical field [0001] The invention relates to the field of identification methods, in particular to a method capable of discriminating the orientation of a transponder. Background technique [0002] At present, the opening of the door lock is mainly done by inserting the mechanical key into the door lock. A door lock system used to replace the traditional mechanical key to control the door lock switch, and realize the control of the door lock through wireless communication; but the existing keyless entry system cannot identify whether the key is inside or outside the door, if The key is outside the door or within the effective distance of the door, and other people can unlock and enter the room by triggering the power-on device outside the door, which poses a great security risk. Contents of the invention [0003] The purpose of the present invention is to overcome the disadvantages of the above prior art and provide a practical and convenient identification system with...
Claims
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IPC IPC(8): H04B1/59
Inventor 郭榕颜常青陈敏一
Owner 福建省天鼎电子技术有限公司