Abstract: Disclosed is a method of analyzing a programmable logic controller (PLC) logic to detect whether an anomaly that deviates from a standard pattern occurs in a repeated cycle. After modeling and patterning an operation pattern of automation equipment and processes with a graph, an anomaly detecting model capable of detecting whether a pattern is abnormal may be constructed as a graph AutoEncoder model. By detecting the change in the process pattern, it is possible to early detect the anomaly of the equipment and processes.
Type:
Application
Filed:
July 20, 2022
Publication date:
January 26, 2023
Applicant:
UDMTEK CO., LTD.
Inventors:
Gi Nam Wang, Jun Pyo Park, Seung Woo Han, Geun Ho Yu, Min Young Jung, Hee Chan Yang, Seung Jong Jin
Abstract: A method of alarming an abnormal state of a line of an automated manufacturing system using a programmable logic controller (PLC) signal pattern is provided.
Type:
Application
Filed:
July 22, 2011
Publication date:
February 27, 2014
Applicant:
UDMTEK CO., LTD.
Inventors:
Hyeong Tae Park, Chol Hwan Kim, Gi Nam Wang, Sang Chul Park, Jin Young Cho, Jung Ho Nam
Abstract: Disclosed are a PLC (Programmable Logic Controller) symbol structure for a PLC code for automatically generating an input/output model, and a simulation apparatus and a simulation method for testing the PLC code using the same. In one embodiment, a computer-readable recording medium records a PLC code including a plurality of PLC symbols, wherein each of the PLC symbols includes a plurality of levels identified by an identifier, and a computer automatically generates an input/output model using the structure of each of the PLC symbols, thereby performing a simulation for testing the PLC code. The PLC symbol structure according to one embodiment systematically contains information required for automatically generating the input/output model, making it possible to automatically generate the input/output model for testing the PLC code in an easier manner without knowledge of simulation and modeling, and reducing the time consumed and the labor required for generating the input/output model.
Type:
Grant
Filed:
March 24, 2010
Date of Patent:
December 17, 2013
Assignee:
UDMTEK Co., Ltd.
Inventors:
Gi Nam Wang, Sang Chul Park, Hyeong Tae Park
Abstract: An apparatus and method for distinguishing between tack-welding and welding are provided. The apparatus for distinguishing between tack-welding and welding includes: a current sensor configured to detect arc current of a welder; and a distinguish control unit configured to distinguish whether a welding operation performed by the welder is tack-welding or welding based on the arc current detected by the current sensor for a predefined period of time. Accordingly, the amount of work performed by a welding worker can be fairly and accurately evaluated.
Type:
Application
Filed:
July 27, 2011
Publication date:
May 23, 2013
Applicant:
UDMTEK CO., LTD.
Inventors:
Eui Koog Ahn, Lock-Jo Koo, hee won Jo, Seung Taek Hong, Chang Ho Lee, Gi Nam Wang, Sang Chul Park
Abstract: Provided are a system and a method for monitoring welding operations. The system includes a welding machine, a current sensor sensing an operation time of the welding machine and a welding current, a welding information database storing information of the operation time of the welding machine and the welding current for each welding operator and storing information of a consumed charge amount of the welding machine, which is preset for each welding operation process, a data analyzer checking a charge amount consumed for the operation time by using the sensed operation time of the welding machine and the welding current and determining whether the welding operator achieves a task goal of a corresponding process by comparing the checked consumed charge amount with the preset consumed charge amount for a process performed by the welding machine, and a display unit outputting a result of the determining, performed by the data analyzer, whether the welding operator achieves a task goal of a corresponding process.
Type:
Application
Filed:
June 5, 2011
Publication date:
May 9, 2013
Applicant:
UDMTEK CO., LTD.
Inventors:
Jae Geun Park, Yong Woo Kang, Tae Hyuck Yoon, Eui Koog Ahn, Lock-Jo Koo, Hee Won Jo, Seung Taek Hong, Chang Ho Lee, Gi Nam Wang, Sang Chul Park
Abstract: Disclosed are a PLC (Programmable Logic Controller) symbol structure for a PLC code for automatically generating an input/output model, and a simulation apparatus and a simulation method for testing the PLC code using the same. In one embodiment, a computer-readable recording medium records a PLC code including a plurality of PLC symbols, wherein each of the PLC symbols includes a plurality of levels identified by an identifier, and a computer automatically generates an input/output model using the structure of each of the PLC symbols, thereby performing a simulation for testing the PLC code. The PLC symbol structure according to one embodiment systematically contains information required for automatically generating the input/output model, making it possible to automatically generate the input/output model for testing the PLC code in an easier manner without knowledge of simulation and modeling, and reducing the time consumed and the labor required for generating the input/output model.
Type:
Application
Filed:
March 24, 2010
Publication date:
January 26, 2012
Applicant:
UDMTEK CO., LTD.
Inventors:
Gi Nam Wang, Sang Chul Park, Hyeong Tae Park