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Smart card positioning method for automobile wireless access control system

A positioning method and smart card technology, applied in the field of smart card positioning, can solve the problem of being unable to judge whether the smart card is inside or outside the car

Active Publication Date: 2011-05-04
SHENZHEN HANGSHENG ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a smart card positioning method for an automobile wireless access control system, so as to solve the problem that the prior art cannot judge whether the smart card of the automobile keyless access control system is inside or outside the car

Method used

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  • Smart card positioning method for automobile wireless access control system
  • Smart card positioning method for automobile wireless access control system
  • Smart card positioning method for automobile wireless access control system

Examples

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Embodiment Construction

[0140] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0141] Select the car receiving antenna for receiving wireless signals and four car transmitting antennas for transmitting wireless low-frequency signals with the same signal frequency: the first transmitting antenna A, the second transmitting antenna B, the third transmitting antenna C and the fourth transmitting antenna D, and a smart card matching the receiving antenna and the four transmitting antennas.

[0142] The matching of the transmitting antenna with the smart card means that the smart card can receive the wireless signal of the transmitting antenna and detect the magnetic field strength generated by the transmitting antenna at the smart card; the matching of the receiving antenna with the smart card means that the wireless signal sent by the smart card can be detected received by the receiving antenna.

[0143] like figure 1 , ...

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Abstract

The invention discloses a smart card positioning method for an automobile wireless access control system. The method comprises the following steps that: 1, a transmitting antenna, a receiving antenna, a smart card and an automobile interior control unit are selected; 2, the transmitting antenna, the receiving antenna and the automobile interior control unit are arranged; 3, the automobile interior control unit sends a command to the transmitting antenna so as to start the transmitting antenna to transmit a signal and the smart card detects the magnetic field intensity of the signal and transmits magnetic field intensity data to the automobile interior control unit through the receiving antenna; and 4, the automobile interior control unit receives the magnetic field intensity data, converts the magnetic field intensity data into a distance value according to a preset transformational relation and compares distance data with prestored reference data so as to determine the position of the smart card and judge whether to respond to an automobile unlocking request or an automobile starting request according to a determination result. By the method, an automobile can be passively accessed and started and great convenience is brought to a driver.

Description

technical field [0001] The invention relates to a smart card positioning method, in particular to a smart card positioning method for an automobile wireless access control system. Background technique [0002] At present, the common car wireless access control system is car remote keyless entry system (RKE, Remote Keyless Entry). The car keyless access control system is developed on the basis of the car remote access control system. As a new generation of car anti-theft technology, it is gradually developing and growing. It is now mostly equipped in high-end brand cars, equipped with keyless access control and ignition authentication systems. The car has gradually become a symbol of the driver's status. When the driver enters the designated area with a smart card, the car keyless access control system can recognize the smart card, and if it is judged to be a legally authorized smart card, it will automatically unlock and open the door. [0003] In the car keyless access co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G07C9/00G08C17/02G01S5/14B60R25/24
Inventor 王勇
Owner SHENZHEN HANGSHENG ELECTRONICS
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