Patents by Inventor Chang-mook Kim
Chang-mook Kim has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 11936417Abstract: The present invention relates to a time-division duplex (TDD) antenna apparatus which can reduce signal loss, and thereby minimize the noise figure (NF) of a system and extend uplink coverage of the system, by separating a transmitter circuit from a receiver circuit of the antenna apparatus, and disposing a low noise amplifier (LNA) of the receiver circuit between a reception antenna and a reception filter of the receiver. A time-division duplex antenna apparatus according to an embodiment of the present invention includes: a transmitter which includes at least one transmission antenna module and transmits a downlink signal through a first path; a receiver which includes at least one reception antenna module and receives an uplink signal through a second path that is separated from the first path without any overlapping portions thereof; and a controller which controls the transmitter and the receiver in a time-division duplex manner.Type: GrantFiled: December 2, 2021Date of Patent: March 19, 2024Assignee: KMW INC.Inventors: Duk Yong Kim, Min Seon Yun, Bae Mook Jeong, Chang Seob Choi, Su Won Lee
-
Publication number: 20220348830Abstract: Disclosed are a method and apparatus of predicting properties of feed and products in a reformer. The method of predicting properties of feed and products in a reformer includes training a first predictive model for predicting the properties of feed in the reformer and a second predictive model for predicting the properties of products in the reformer; predicting the properties of feed being currently supplied to the reactor in real time by allowing a first prediction unit including the trained first prediction model to receive a current operating condition of the reactor in the reformer; and predicting the properties of products being produced in the reactor in real time by allowing a second prediction unit including the trained second prediction model to receive the current operating condition and the predicted properties of feed.Type: ApplicationFiled: April 29, 2022Publication date: November 3, 2022Inventors: Min Ho Kim, Jung Gon Kim, Chang Mook Kim, Chang Weon Lee, Jung Hoon Seo, Jin Cheol Seo, Ja Young Heo
-
Publication number: 20220350309Abstract: Disclosed are a method and apparatus for controlling a reactor in a reformer.Type: ApplicationFiled: April 29, 2022Publication date: November 3, 2022Inventors: Min Ho Kim, Jung Gon Kim, Chang Mook Kim, Jin Cheol Seo, Ja Young Heo
-
Publication number: 20220351809Abstract: Provided are a device and method for predicting product properties of a naphtha splitting unit (NSU). The method includes training a prediction model for predicting the product properties of the NSU, inputting an input variable to the trained prediction model to acquire a prediction value for each output variable, and outputting the acquired prediction values for the output variables.Type: ApplicationFiled: April 29, 2022Publication date: November 3, 2022Inventors: Min Ho Kim, Jung Gon Kim, Chang Mook Kim, Hyun Joo Kim, Ho Dong Park
-
Patent number: 11105348Abstract: A control system for construction machinery, includes a hydraulic pump, first and second actuators connected to the hydraulic pump through first and second parallel lines respectively, first and second control valves installed in the first and second parallel lines respectively and configured to control operations of the first and second actuators, first and second spool displacement adjusting valves configured to control displacement amounts of the spools of the first and second control valves, and a control valve control portion configured to output the control signal, and configured to limit a maximum allowable value of the manipulation signal for the first actuator to a value selected by the operator and limit a spool displacement amount of the second control valve according to the limited manipulation signal for the first actuator when the manipulation signal for a multiple operation of the first and second actuators is received.Type: GrantFiled: September 12, 2017Date of Patent: August 31, 2021Assignee: DOOSAN INFRACORE CO., LTD.Inventors: Chang-mook Kim, Woo-yong Jung, Hyeon-sik Ahn, Ki-yong Kim
-
Patent number: 11047405Abstract: A control system for construction machinery, includes a hydraulic pump, at least one control valve installed in a center bypass line connected to the hydraulic pump and configured to control a flow direction of a working oil discharged from the hydraulic pump to selectively supply the working oil to an actuator, a bypass control valve installed downstream from the control valve in the center bypass line to variably control an amount of the working oil draining to a drain tank through the center bypass line, and a controller configured to control operations of the hydraulic pump and the bypass control valve according to a manipulation signal of an operator and to open the bypass control valve according to pump peak occurrence to reduce a pump peak.Type: GrantFiled: March 6, 2018Date of Patent: June 29, 2021Assignee: DOOSAN INFRACORE CO., LTD.Inventors: Woo-Yong Jung, Yong-Lak Cho, Chang-Mook Kim
-
Patent number: 10982691Abstract: A control system for construction machinery, includes a hydraulic pump, first and second actuators connected to the hydraulic pump through first and second parallel lines respectively, first and second control valves installed in the first and second parallel lines respectively and configured to control operations of the first and second actuators, first and second spool displacement adjusting valves configured to control displacement amounts of the spools of the first and second control valves, and a controller configured to output a control signal to the first and second spool displacement adjusting valves corresponding to a manipulation signal of an operator, and configured to limit a spool displacement amount of the second control valve according to the manipulation signal for the first actuator when the manipulation signal for a multiple operation of the first and second actuators is received.Type: GrantFiled: August 31, 2017Date of Patent: April 20, 2021Assignee: DOOSAN INFRACORE CO., LTD.Inventors: Chang-mook Kim, Woo-yong Jung, Hyeon-sik Ahn, Ki-yong Kim
-
Publication number: 20200040917Abstract: A control system for construction machinery, includes a hydraulic pump, at least one control valve installed in a center bypass line connected to the hydraulic pump and configured to control a flow direction of a working oil discharged from the hydraulic pump to selectively supply the working oil to an actuator, a bypass control valve installed downstream from the control valve in the center bypass line to variably control an amount of the working oil draining to a drain tank through the center bypass line, and a controller configured to control operations of the hydraulic pump and the bypass control valve according to a manipulation signal of an operator and to open the bypass control valve according to pump peak occurrence to reduce a pump peak.Type: ApplicationFiled: March 6, 2018Publication date: February 6, 2020Inventors: Woo-Yong JUNG, Yong-Lak CHO, Chang-Mook KIM
-
Patent number: 10519628Abstract: A control system for construction machinery includes a first hydraulic pump, first and second actuators connected to the first hydraulic pump through first and second hydraulic lines respectively, first and second control valves installed in the first and second hydraulic lines respectively and configured to control operations of the first and second actuators, and a controller configured to adjust a spool displacement amount of the first control valve according to an amount of working oil to be supplied to the first actuator when the first actuator performs a single or multiple operation by self-load.Type: GrantFiled: October 3, 2017Date of Patent: December 31, 2019Assignee: DOOSAN INFRACORE CO., LTD.Inventors: Ki-Yong Kim, Hyeon-Sik Ahn, Woo-Yong Jung, Chang-Mook Kim
-
Patent number: 10392779Abstract: In a method of controlling a main control valve of an excavator, when speeds of a boom cylinder and an arm cylinder is increased by handling a boom joystick and an arm joystick, a second arm control spool between a first hydraulic pump and the arm cylinder may be closed. A first boom control spool between the first hydraulic pump and the boom cylinder may be opened to supply a first flux generated from the first hydraulic pump to the boom cylinder. A second boom control spool between a second hydraulic pump and the boom cylinder may be closed. A first arm control spool between the second hydraulic pump and the arm cylinder may be opened to supply a second flux generated from the second hydraulic pump to the arm cylinder.Type: GrantFiled: August 22, 2017Date of Patent: August 27, 2019Assignee: DOOSAN INFRACORE CO., LTD.Inventors: Ki-Yong Kim, Hyeon-Sik Ahn, Woo-Yong Jung, Chang-Mook Kim
-
Publication number: 20190234050Abstract: A control system for construction machinery, includes a hydraulic pump, first and second actuators connected to the hydraulic pump through first and second parallel lines respectively, first and second control valves installed in the first and second parallel lines respectively and configured to control operations of the first and second actuators, first and second spool displacement adjusting valves configured to control displacement amounts of the spools of the first and second control valves, and a controller configured to output a control signal to the first and second spool displacement adjusting valves corresponding to a manipulation signal of an operator, and configured to limit a spool displacement amount of the second control valve according to the manipulation signal for the first actuator when the manipulation signal for a multiple operation of the first and second actuators is received.Type: ApplicationFiled: August 31, 2017Publication date: August 1, 2019Applicant: DOOSAN INFRACORE CO., LTD.Inventors: Chang-mook KIM, Woo-yong JUNG, Hyeon-sik AHN, Ki-yong KIM
-
Publication number: 20190218751Abstract: A control system for construction machinery, includes a hydraulic pump, first and second actuators connected to the hydraulic pump through first and second parallel lines respectively, first and second control valves installed in the first and second parallel lines respectively and configured to control operations of the first and second actuators, first and second spool displacement adjusting valves configured to control displacement amounts of the spools of the first and second control valves, and a control valve control portion configured to output the control signal, and configured to limit a maximum allowable value of the manipulation signal for the first actuator to a value selected by the operator and limit a spool displacement amount of the second control valve according to the limited manipulation signal for the first actuator when the manipulation signal for a multiple operation of the first and second actuators is received.Type: ApplicationFiled: September 12, 2017Publication date: July 18, 2019Inventors: Chang-mook KIM, Woo-yong JUNG, Hyeon-sik AHN, Ki-yong KIM
-
Publication number: 20180094406Abstract: A control system for construction machinery includes a first hydraulic pump, first and second actuators connected to the first hydraulic pump through first and second hydraulic lines respectively, first and second control valves installed in the first and second hydraulic lines respectively and configured to control operations of the first and second actuators, and a controller configured to adjust a spool displacement amount of the first control valve according to an amount of working oil to be supplied to the first actuator when the first actuator performs a single or multiple operation by self-load.Type: ApplicationFiled: October 3, 2017Publication date: April 5, 2018Inventors: Ki-Yong KIM, Hyeon-Sik AHN, Woo-Yong JUNG, Chang-Mook KIM
-
Publication number: 20180066417Abstract: In a method of controlling a main control valve of an excavator, when speeds of a boom cylinder and an arm cylinder is increased by handling a boom joystick and an arm joystick, a second arm control spool between a first hydraulic pump and the arm cylinder may be closed. A first boom control spool between the first hydraulic pump and the boom cylinder may be opened to supply a first flux generated from the first hydraulic pump to the boom cylinder. A second boom control spool between a second hydraulic pump and the boom cylinder may be closed. A first arm control spool between the second hydraulic pump and the arm cylinder may be opened to supply a second flux generated from the second hydraulic pump to the arm cylinder.Type: ApplicationFiled: August 22, 2017Publication date: March 8, 2018Inventors: Ki-Yong KIM, Hyeon-Sik AHN, Woo-Yong JUNG, Chang-Mook KIM
-
Publication number: 20070123648Abstract: The present invention relates to a method for preparing a rubber-reinforced thermoplastic resin, a rubber-reinforced thermoplastic resin prepared by the same method, and a rubber-reinforced thermoplastic resin composition using the same, wherein the rubber-reinforced thermoplastic resin has excellent heat-sealability and thermal stability maintaining good mechanical properties. More specifically, the present invention relates to a method for preparing a rubber-reinforced thermoplastic resin, a rubber-reinforced thermoplastic resin prepared by the same method, and a rubber-reinforced thermoplastic resin composition using the same characterized by, on the basis of 100 weight parts of total monomer used to prepare graft copolymer, using the mixture comprising 10 to 30 weight parts of a rubber latex having average particle diameter of 0.08 to 0.16 ?m and gel content of 65 to 95 weight % and 15 to 45 weight parts of a rubber latex having average particle diameter of 0.26 to 0.Type: ApplicationFiled: March 25, 2005Publication date: May 31, 2007Inventors: Jun-tae Lee, Keun-hoon Yoo, Chan-hong Lee, Hyun-do Kim, Chang-mook Kim