公开(公告)号：US20190004165A1

公开(公告)日：2019-01-03

申请号：US15753254

申请日：2016-08-17

Applicant: UNIVERSITY OF ULSAN FOUNDATION FOR INDUSTRY COOPERATION

Inventor： Sung Oh KWON ,  Baek du JO

IPC: G01S11/00 ,  G01S11/02 ,  G01S11/14

Abstract: A positioning system according to an embodiment of the above description includes a transmitter including a first transmitting unit and a second transmitting unit for transmitting a first signal and a second signal having different velocities, respectively; and a receiver including: a first receiving unit and a second receiving unit for measuring each time of reception of the first signal and the second signal; and a position determining unit for measuring a location of the transmitter using a difference in reception time of the first signal and the second signal.

公开(公告)号：US20180263566A1

公开(公告)日：2018-09-20

申请号：US15741493

申请日：2015-12-30

Applicant: UNIVERSITY OF ULSAN FOUNDATION FOR INDUSTRY COOPERATION

Inventor： Sung Oh KWON ,  Da Hee BAN

IPC: A61B5/00 ,  A61B5/024

CPC classification number: A61B5/726 ,  A61B5/02416 ,  A61B5/7207 ,  A61B5/7246 ,  A61B5/725

Abstract: A motion artifact detecting method using wavelet transform which is capable of removing the problem caused by a radio noise and a motion artifact generated during the measurement of a PPG signal which is one of bio-signals, the method including: measuring a PPG signal; generating a signal obtained by removing a radio noise from the measured PPG signal; setting a reference signal from the signal from which the radio noise is removed; selecting a base signal based on the set reference signal; performing wavelet transform using the base signal; and detecting and removing a motion artifact using the wavelet-transformed value.