Intelligent remote control key entry method and device of automobile

Abstract

The invention discloses an intelligent remote control key entry method and a device of an automobile. The device comprises an automobile key transmitting part and an automobile key receiving part, the automobile key transmitting part combines the a transmitting frequency band, transmitting power and transmission coding data into radio-frequency signals numbering N of different frequency bands, and a power amplifier and a radio-frequency antenna are used for transmitting the radio-frequency signals; the receiving part receives data transmitted by the automobile key transmitting part; after receiving frequency is determined, whether the receiving frequency is effective data is judged, interference information data is filtered, and information data conforming to requirements is stored in an FIFO memory; and data is decryption and matching operation are carried out on the data, then an automobile door is opened/ closed according to the information code content. The invention adopts microprocessor control, digital phase-locked frequency selection and a multiband communication technology, solves the problem of signal interference caused by communication at single frequency band in the common PKE system by utilizing multiband radio-frequency signal reorganization and a data frame structure format so as to avoid the interference phenomena among multiple keys of the same automobile type. The invention has the characteristics of simple structure, small volume, low power consumption, high sensitivity and the like.

Description

technical field [0001] The invention relates to a method for entering an automobile intelligent remote control key, and also discloses a device suitable for the method, which belongs to the technical field of motor vehicle access control. Background technique: [0002] RKE (Remote Keyless Entry) remote keyless entry system consists of a transmitter and a receiver. The transmitter includes a button, an encryption module, a transmitting circuit and a battery; the receiver includes an information processing single-chip microcomputer, a radio frequency receiving module and an output control circuit. When the user presses the control button of the transmitter, the data information is sent out from the transmitting antenna in the form of a secret code, and the receiver at the receiving end performs data reception identification and unlocks the car lock. [0003] Most vehicles on the market currently have the RKE system as a standard or optional accessory. The system typically us...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a car intelligent remote control key entry method, which solves the problem of signal interference caused by single frequency band communication that often occurs in common RKE systems

[0006] The present invention also provides a device adapted to the above method, which uses multi-band radio frequency signal identification and a special data frame structure format to solve the problem of interference between multiple keys of the same vehicle type

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