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Automobile Bluetooth key positioning method

A technology of bluetooth key and positioning method, which is applied to services based on location information, short-distance communication services, measuring devices, etc., can solve the problems of low positioning accuracy and low judgment accuracy, and achieve the effect of improving positioning accuracy.

Active Publication Date: 2021-02-23
SAIC-GM-WULING AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this method is: the positioning accuracy is not high, and the judgment accuracy is low

Method used

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  • Automobile Bluetooth key positioning method
  • Automobile Bluetooth key positioning method
  • Automobile Bluetooth key positioning method

Examples

Experimental program
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Embodiment Construction

[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0017] A method for locating a car bluetooth key in an embodiment of the present invention, comprising the following steps:

[0018] S101. Draw a plane polygon representing the outline of the vehicle, establish a plane Cartesian coordinate system on the plane where the polygon is located, and calculate the coordinates of each vertex of the polygon;

[0019] S102, the first Bluetooth device periodically broadcasts data to the outside, and after the Bluetooth key (i.e. the mobile phone) receives and matches successfully, broadcasts the data to the outside; all the Bluetooth devices receive the broadcast data of the Bluetooth key, and output their respective RSSIs to the ECU; The number of Bluetooth devices shall not be less than 3, which shall be installed in 3 different positions within the polygonal plane;

[0020] S103, the ECU calculates the distance betwe...

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PUM

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Abstract

The invention discloses an automobile Bluetooth key positioning method. The method comprises the steps that a rectangular plane coordinate system is established, coordinates of vertexes of an automobile contour plane polygon are calculated, at least three positions in the polygon are each provided with a Bluetooth device, RSSI of each Bluetooth device for receiving Bluetooth key broadcast data isobtained, the distance between a Bluetooth key and each Bluetooth device is calculated based on the RSSI, on the above basis, coordinates of the Bluetooth key projected on the polygonal plane are calculated, and whether the Bluetooth key is in a vehicle or not is judged according to the position relation between the coordinates and the polygon. The Bluetooth devices are arranged at the at least three positions, and the position of the Bluetooth key is determined based on the RSSI, so that the positioning precision of the Bluetooth key is improved.

Description

technical field [0001] The invention relates to the technical field of wireless distance measurement and positioning, in particular to a method for positioning an automobile bluetooth key. Background technique [0002] The Bluetooth key is a function that uses the Bluetooth function of the mobile phone to control the vehicle when it is close to the vehicle. The Bluetooth key can realize door opening / closing, trunk opening / closing and other related operations. The Bluetooth key is an invisible smart key, which can not only realize the main functions of the physical key, but also realize richer car networking functions, such as lending the car to a friend when the person is not present, and realizing the virtual key to start the car, etc. [0003] The prior art generally utilizes the vehicle-mounted T-Box bluetooth device to cooperate with the mobile phone APP to realize the car-linked bluetooth key. Generally, the RSSI (Received Signal Strength Indicator, received signal st...

Claims

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Application Information

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IPC IPC(8): H04W4/02H04W4/029H04W4/80G01S11/06G07C9/00
CPCH04W4/80H04W4/029H04W4/023G07C9/00309G01S11/06Y02D30/70
Inventor 崔硕高晖姚佐平黄建鹏陈长健
Owner SAIC-GM-WULING AUTOMOBILE CO LTD
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