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公开(公告)号：US11963067B2
公开(公告)日：2024-04-16
申请号：US17615197
申请日：2020-05-27
申请人： AMOTECH CO., LTD.
发明人： Hyungil Baek , Kyunghyun Ryu , Hoeyoung Hwang , Chanwoo Lee , Seongjae Ahn
摘要： A method for providing a location tracking service on the basis of context-aware information of a location tracker, according to the present invention, transmits a signal while changing a communication method by classify a situation as an emergency situation and a normal state which is a non-emergency situation according to the context-aware information of the location tracker, such that it is possible to use power consumption reduced by a low-power communication method in the normal state, and in case of the emergency situation, to safely handle the emergency situation through a sufficient power communication method.
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公开(公告)号：US11528074B2
公开(公告)日：2022-12-13
申请号：US17416460
申请日：2019-12-03
申请人： AMOTECH CO., LTD.
发明人： Jaeil Park , Hyungil Baek , Chanwoo Lee , Yonggil Jo
摘要： A repeater system for LPWAN according to the present invention is characterized by comprising: a first antenna and a second antenna which may be antennas for transmission or reception according to a user's selection; a switch which is coupled to each of the first antenna and the second antenna; an RF transmission end and an RF reception end which are connected to the first antenna and the second antenna through the switch; and a control unit for controlling the switching of the switch and for controlling the RF transmission end and the RF reception end, wherein the first antenna is a multi-directional dipole antenna, and the second antenna includes a directional antenna for receiving and transmitting signals in a single direction.
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公开(公告)号：US11827178B2
公开(公告)日：2023-11-28
申请号：US17290731
申请日：2019-10-22
申请人： AMOTECH CO., LTD.
发明人： Hyungil Baek , Kyunghyun Ryu , Jaeil Park , Chanwoo Lee , Hanju Do
CPC分类号： B60R25/245 , G01S5/0205 , B60R2325/10
摘要： The present invention is to perform position estimation in relation to a vehicle and a key module by using an ultra-wideband (UWB) and, specifically, relates to a method and system for precise position estimation for a vehicle, whereby position can be estimated, with effects minimized that result from the type of the vehicle and the quality of exterior metal of the vehicle. The method for precise position estimation for a vehicle over a UWB comprises the steps of: receiving, by an LIN transceiver, a position estimation-related signal delivered from an internal part of a vehicle, and transmitting the signal to a UWB transceiver to start the position estimation; the control unit measuring a predetermined number of times reception signal delays occurring in relation to a UWB tag, while turning on or off the switch of each of M antennas at predetermined time intervals; determining antennas at which the value of a corresponding reception signal delay measured the predetermined number of times is lower than a preset threshold; measuring the distances between the determined antennas and the distances between each of the antennas and the UWB tag; determining position angles with respect to the UWB tag by using a two-way ranging (TWR) positioning method on the basis of the distances between the antennas and the distances between each of the antennas and the UWB tag; measuring the distances between the UWB tag and UWB anchors measured using a triangulation method according to the M anchors and UWB tag; and estimating the position of the UWB tag on the basis of the position angles with respect to the UWB tag and the distances between the N UWB anchors and the UWB tag.
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公开(公告)号：US11353489B2
公开(公告)日：2022-06-07
申请号：US17277660
申请日：2019-09-17
申请人： AMOTECH CO., LTD.
发明人： Jongho Park , Hyungil Baek , Chanwoo Lee
摘要： Disclosed is herein an antenna performance tester including: a horizontal rotor 200 rotatable about a shaft part 110 to which a DUT holder 300 is detachably coupled; and a vertical rotor 500 to which a reference antenna holder 400 is detachably fixed and which is spaced apart from a side surface of the DUT holder 300, is installed perpendicular to the horizontal rotor 200, and is rotatable about a virtual central point lying at the center. The antenna performance tester is advantageous in that: a reference antenna measures an RF while performing transmission and reception with respect to a DUT in all directions at a constant distance from the DUT; extension and replacement are possible depending on a frequency to be measured; and an influence of reflected waves is minimized at RF measurement, antenna performance can be simply tested in an anechoic chamber or even in a semi-anechoic chamber.
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