UWB 통신을 이용한 센서 응용: 자동차 내 좌석 탑승 감지

Abstract

UWB(ultra-wideband) technology has recently attracted attention owing to its ability to accurately measure distance and enable communication. Currently, applications such as sensors capable of recognizing situations are being considered, moving beyond communication and distance measurement. In this study, we developed a UWB-based sensor application system that detects whether a person is seated in a car. With this system, it is possible to send an alert to the driver’s smartphone if the driver leaves the car with a child in the back seat without a separate seat detection sensor. The proposed sensor system uses changes in the channel status of the vehicle, which are recognized when the UWB communication device performs the communication function, to detect whether all seats in a car are occupied. The proposed system, using the DW1000 module, demonstrated detection performance of 93 % or more in the case of one receiver, 97 % in the case of two receivers, and 100 % in the case of four receivers for all nine scenarios where four people were seated in a car in different combinations of seats.