Method and device for vehicle passive keyless entering, starting and locking based on ultra-wide band

Abstract

The invention discloses a method and a device for vehicle passive keyless entering, starting and locking based on ultra-wide band. The device comprises a vehicular key, a master controller, a door lock sensor, a starting / stopping button, a seat sensor and a vehicular body antenna array, wherein the door lock sensor, the starting / stopping button, the seat sensor and the vehicular body antenna array are all connected with the master controller through a vehicular body circuit. The method includes: using UWB (ultra-wide band) signals to precisely position the vehicular key, detecting the position of the vehicular key and the position information of personnel in the vehicle according to each trigger action of a driver, and using a joint judgment method to control operation of a vehicular door lock, a starting system and an alarming system. In addition, the vehicular key is capable of recording and storing information interested by the driver and vehicular dynamic information. Using the method and the device can better avoid accidents caused by misjudgment of the master controller or misoperation of personnel.

Description

technical field [0001] The invention relates to automobile safety and anti-theft electronic technology and wireless communication technology, in particular to a vehicle keyless entry and start method and device based on Ultra Wide-Band (UWB) positioning. Background technique [0002] With the popularity of automobiles, people have put forward higher requirements for automobile safety and convenience. High-reliability anti-theft, smart entry, keyless start, high integration, and real-time communication are the trends in the development of intelligent vehicles. [0003] The original car anti-theft is only accomplished by a simple mechanical lock, which is very easy to be destroyed and has low security. In 1994, NXP Semiconductors (Philips Semiconductors at the time) successfully applied Radio Frequency Identification (RFID) technology to automotive electronic engine locks for the first time. Communication realizes key identification, and judges whether to unlock the door loc...

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to overcome the defect that the positioning accuracy of the keyless entry system based on RSSI technology is not high, and propose a method and device for keyless entry, starting and locking of vehicles based on ultra-wideband, and use UWB signals to accurately locate the vehicle key: that is, by measuring The UWB signal emitted by the vehicle key radiates to the time difference of arrival (Time Difference Of Arrival TDOA) of multiple body antennas to calculate the spatial position of the key relative to the vehicle

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