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公开(公告)号：US20150012577A1
公开(公告)日：2015-01-08
申请号：US14370052
申请日：2012-12-18
Applicant: KOREA AEROSPACE RESEARCH INSTITUTE
Inventor： Shi-Hwan Oh , Jin-Hee Kim
IPC: G06F7/483
Abstract: The present invention relates to a signal processing device and method. The device receives, from a sensor which measures a physical quantity applied thereto and outputs an accumulated or integrated value of the physical quantity as an M-bit digital value, the digital value, and, when a difference between the physical quantities at two successive data acquisition times lies within a predetermined range and an absolute value of a digital counter increment is greater than 2M-1, calculate the digital counter increment as the physical quantity measured by the sensor.
Abstract translation: 本发明涉及信号处理装置及方法。 该装置从测量施加到其上的物理量的传感器接收作为M位数字值的物理量的积分或积分值，数字值，并且当两个连续数据的物理量之间的差 采集时间在预定范围内，数字计数器增量的绝对值大于2M-1，计算数字计数器增量作为传感器测量的物理量。
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公开(公告)号：US20140185940A1
公开(公告)日：2014-07-03
申请号：US14092352
申请日：2013-11-27
Applicant: Korea Aerospace Research Institute
Inventor： Woon Ki Hong , Eun Sung Lee , Kwang Sik Choi , Moon Beom Heo , Gi Wook Nam
IPC: G06K9/00
Abstract: Provided is a satellite navigation visibility calculation apparatus. The satellite navigation visibility calculation apparatus includes a processing unit configured to binarize an input sky view image to create an binary image, an extraction unit configured to extract a plurality of feature points from the binary image, and a calculation unit configured to calculate satellite navigation dilution of precision (DOP) corresponding to the sky view image using the plurality of feature points.
Abstract translation: 卫星导航可视性计算装置。 卫星导航可视性计算装置包括：处理单元，被配置为二进制化输入的天视图以创建二进制图像;提取单元，被配置为从二值图像提取多个特征点;以及计算单元，被配置为计算卫星导航稀疏 使用多个特征点对应于天视图图像的精度（DOP）。
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123.发明申请DETECTING METHOD OF GPS CLOCK SIGNAL JUMP USING CARRIER PHASE MEASUREMENTS IN REAL-TIME 审中-公开GPS时钟信号的实时检测方法使用载波相位测量公开(公告)号：US20130335267A1
公开(公告)日：2013-12-19
申请号：US13857528
申请日：2013-04-05
Applicant: KOREA AEROSPACE RESEARCH INSTITUTE
Inventor： Youn Jeong HEO , Jeongho CHO , Moon-Beom HEO
IPC: G01S19/20
Abstract: Provided is a method of detecting GPS clock signal jump, comprising a data obtaining step of obtaining GPS carrier phase measurements from a GPS receiver and satellite orbits from IGS to detect the GPS clock signal jump; a GPS clock bias calculating step of eliminating errors included in the data obtained from the data obtaining step and calculating GPS clock bias; a Teager energy calculating step of applying a Teager energy operator to the GPS clock bias calculated with respect to each satellite in the GPS clock bias calculating step and calculating Teager energy to determine whether the GPS clock jump is occurred; and a GPS clock jump detecting step of checking whether a Teager energy is larger than a threshold value. Therefore, the present invention can effectively detect the GPS clock signal jump in real-time.
Abstract translation: 提供了一种检测GPS时钟信号跳跃的方法，包括：数据获取步骤，从GPS接收机获取GPS载波相位测量值，并从IGS获取卫星轨道，以检测GPS时钟信号跳变; GPS时钟偏差计算步骤，消除从数据获取步骤获得的数据中包括的误差并计算GPS时钟偏差; 一种Teager能量计算步骤，用于在GPS时钟偏差计算步骤中针对每个卫星计算出的GPS时钟偏差应用Teager能量算子，并计算Teager能量以确定GPS时钟跳跃是否发生; 以及GPS时钟跳跃检测步骤，检查Teager能量是否大于阈值。 因此，本发明可以实时有效地检测GPS时钟信号跳变。
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公开(公告)号：US12291356B2
公开(公告)日：2025-05-06
申请号：US17785242
申请日：2020-03-19
Applicant: KOREA AEROSPACE RESEARCH INSTITUTE
Inventor： Youeyun Jung , Hyochoong Bang , Seongheon Lee
Abstract: A safe landing point search device for searching for a safe landing point of an unmanned exploration device that lands on and explores a celestial body, includes a terrain map obtaining unit configured to obtain a terrain map, a contour line generating unit configured to generate contour lines based on a reference minimum height value and a height interval value by using the terrain map, a largest empty circle (LEC) searching unit configured to search for one or more LECs having a radius greater than or equal to a lower-limit radius in a contour line map including the contour lines, and a safe landing point outputting unit configured to output a safe landing point having a largest radius among the one or more LECs and transmit the safe landing point to the unmanned exploration device.
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公开(公告)号：US20250075707A1
公开(公告)日：2025-03-06
申请号：US18816024
申请日：2024-08-27
Applicant: KOREA AEROSPACE RESEARCH INSTITUTE
Inventor： Seong Min JEON
IPC: F04D29/051 , F02K9/46 , F04D17/10 , F04D29/056 , F04D29/10 , F04D29/46
Abstract: A turbopump includes a casing, a rotational shaft rotatably supported on the casing, and an impeller mounted on a side of the rotational shaft and pressurizing a fluid flowing into the impeller from an inlet of the casing, wherein axial thrust is controlled as a clearance formed between the impeller and the casing in a length direction of the rotational shaft varies according to a fluid pressure difference between front and rear sides of the impeller.
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Patent Agency Ranking
公开(公告)号：US12188849B2
公开(公告)日：2025-01-07
申请号：US17811355
申请日：2022-07-08
Applicant: KOREA AEROSPACE RESEARCH INSTITUTE
Inventor： Jung Jin Lee
Abstract: Provided is a control surface load simulation apparatus including a reaction force providing structure. The control surface load simulation apparatus includes a first support surface, a second support surface apart from the first support surface in a height direction, a control surface located between the first support surface and the second support surface, an actuator connected to the second support surface and configured to apply a certain load to the control surface, and a reaction force providing structure connected to the first support surface and the control surface to be movable relative to the first support surface and the control surface, the reaction force providing structure being configured to apply a reaction force corresponding to the load to the control surface.
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公开(公告)号：US20240369718A1
公开(公告)日：2024-11-07
申请号：US18689014
申请日：2022-10-12
Applicant: Korea Aerospace Research Institute
Inventor： Sung Hyuck IM , Kee Joo LEE , Jae Sung PARK
Abstract: Disclosed are a positioning system and a positioning method using a low earth orbit satellite. The positioning system using a low earth orbit satellite according to the present invention comprises a generation unit for generating, when a communication period with a ground control station is reached, a first telemetry signal including a time value according to a reference time used by a low earth orbit satellite; a confirmation unit for confirming, on the basis of a navigation signal received from a navigation satellite, the GNSS time used as a reference by the navigation satellite; an adjustment unit for adjusting the time value in the first telemetry signal so as to be synchronized with the GNSS time; and a transmission unit for broadcast transmitting a second telemetry signal, after the adjustment, so that a positioning receiver on the ground can determine the position by using the second telemetry signal.
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公开(公告)号：US20240269940A1
公开(公告)日：2024-08-15
申请号：US18567856
申请日：2022-05-27
Applicant: KOREA AEROSPACE RESEARCH INSTITUTE
Inventor： Ik Hyeon CHOI , Joo Hee LEE , Jong Won LEE
CPC classification number: B29C70/32 , B65H49/32 , B65H57/06 , B65H59/38 , B65H2701/312 , B65H2701/314
Abstract: A fiber winding device includes a spool assembly having a plurality of bobbins provided around a spiral wire in a circumferential direction to form a spool surface, a guide ring provided at a front part of the center of the spool assembly in a direction oblique to the spool surface, and a wire transfer unit for transferring the spiral wire to pass through the guide ring. The spiral wire is disposed to perpendicularly pass through the center of the guide ring. The spool assembly is disposed in a direction oblique to the wire, and fibers from the plurality of bobbins are wound on the spiral wire along the guide ring. In addition, by sequentially arranging a plurality of fiber winding devices along the spiral wire, fibers in multiple layers can be wound on one spiral wire sequentially and continuously.
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公开(公告)号：US11927974B2
公开(公告)日：2024-03-12
申请号：US17528365
申请日：2021-11-17
Applicant: Korea Aerospace Research Institute
Inventor： Kwang Kun Park , Jun Seong Lee , Kee Joo Lee
Abstract: The flow rate control device includes a main plate corresponding to an inner diameter and including a through hole which is formed at the center thereof and through which a fluid flows, a sub-plate corresponding to a size of the through hole, disposed in front of the main plate, and applied with a pressure of the flowing fluid, and an expansion and contraction flow path formed to connect the through hole and a circumference of the sub-plate to each other and expanded and contracted by the pressure applied to the sub-plate. The expansion and contraction flow path includes a plurality of holes which are formed in a side surface thereof and through which the flow flows, and has a cross-sectional area changed by the pressure to control a flow rate.
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公开(公告)号：US20240018981A1
公开(公告)日：2024-01-18
申请号：US18477685
申请日：2023-09-29
Applicant: Korea Aerospace Research Institute
Inventor： Chun Taek Kim
Abstract: Provided is a heat exchanger heat transfer enhancement device, and in particular, to a heat exchanger heat transfer enhancement device by allowing a fluid flowing into a heat exchanger to form a uniform flow field. A flow distribution device is disposed at an inlet of a pipe through which a fluid is introduced, and the flow distribution device includes a plurality of holes formed on a circumferential surface and an end portion to distribute the fluid to the center and the periphery. Also, a flange is formed at one end and coupled between the pipe and a diffusion portion. The distributed fluid passes through a heat exchanger, and here, one or more screens are disposed to make a flow field of the fluid more uniform.
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