Device and method for detecting leaving of intelligent key in rear box

Abstract

The invention provides a device and a method for detecting the leaving of an intelligent key in a rear box, and the method employs a UWB or Bluetooth positioning technology, and is used for the detection of the intelligent key in the front row, the rear row and the rear box in the vehicle through arranging a base station B1 at a preset distance of a main driver in the vehicle. A base station B2, a base station B3, a base station B4 and a base station B5 are arranged at the four top corners of a vehicle body correspondingly and used for intelligent key detection within 4 meters outside the vehicle. Intelligent key coordinate information detected by the base stations and RSSI values of all the base stations are received through a central processing unit, and the position of the intelligent key relative to a vehicle body is calculated; and the vehicle control unit is used for controlling the rear box to be opened and closed and reminding a user according to a detection result of the central processing unit so as to prevent the intelligent key from being locked in the rear box.

Description

technical field [0001] The invention relates to the field of vehicle technology, in particular to a device and method for detecting that a smart key is left in a rear trunk. Background technique [0002] As people's requirements for automobile intelligence, automation, and comfort are increasing day by day. Vehicle keyless entry has been sought after by car owners in recent years due to its portable operation and comfortable experience. Car keyless entry, that is, put the key in your pocket or bag, the car interior detection system will automatically recognize the position of the key relative to the body, and when the preset conditions are met, the door will be automatically unlocked or locked. [0003] UWB positioning accuracy can reach within 20 centimeters, and it will be widely used in keyless entry system solutions in recent years, which is also an inevitable trend in future development. At present, some mid-to-high-end models have adopted UWB precise positioning tech...

AI Technical Summary

Problems solved by technology

There will be a blind spot for the detection in the rear trunk. Due to the complex environment in the car, the signal reflection and attenuation are large, the signal transmitted to the rear trunk is too weak or affected by multiple paths, so that the base station in the car cannot accurately detect the smart key in the rear trunk.

When the smart key is put into the rear trunk, it may be falsely detected or not detected, and the door will be locked at this time, which will cause inconvenience to the owner

In order to solve the blind area of ​​the rear tail box detection, usually add another base station to the rear tail box, which will significantly increase the hardware cost and the difficulty of installation and wiring

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