Method and device for calculating the distance or angular coordinates between the vehicle and the smartphone using the arrival time of sound waves and triangulation

摘要

Disclosed is a method of calculating a distance or angular coordinates between a vehicle and a smartphone using the arrival time of sound waves and triangulation. This method calculates the distance or angular coordinates between the vehicle and the driver's mobile device by using the arrival times of sound waves transmitted from a plurality of speaker channels. In more detail, the step of executing a smart key application on the driver's mobile device, and when the distance between the driver's mobile device and the vehicle is within a predetermined first distance value, the Bluetooth connection request transmitted from the driver's mobile device is transmitted to the vehicle. Transmitting a response to the Bluetooth connection request from the vehicle to the driver's mobile device. After a Bluetooth connection is established between the driver's mobile device and the vehicle, the driver's mobile device uses a microphone. Performing an operation of turning on, and performing an operation of turning on a plurality of internal or external speakers by the vehicle, transmitting a micro sound wave signal of the driver's mobile device through a plurality of speaker channels, and the plurality of speaker channels Transmitting a sound wave signal of a different frequency; The driver's mobile device calculates a distance between the driver's mobile device and the vehicle based on the sound wave signals received from the plurality of speaker channels, wherein the calculated distance between the vehicle and the driver's mobile device is If it is within the second distance value, transmitting a control permission signal from the driver's mobile device to the vehicle, and when the vehicle receives the control permission signal, the steps of unlocking a door or trunk or preparing to be started. Include. According to the present invention, the distance or coordinates between the vehicle and the smartphone can be more precisely calculated using the arrival time of the sound wave and triangulation.