• Journal of Institute of Control, Robotics and Systems
• /
• v.6 no.5
• /
• pp.415-425
• /
• 2000

An open architecture manufacturing strategy intends to integrate manufacturing components on a single platform so that a particular component can be easily added and/or replaced. Therefore, the control scheme based upon the open architecture concept is hardware-independent. In this paper, a modular and object oriented approach for a PC-based open robot control system is investigated. A standard reference model for robot systems, which consists of three modules; hardware module, operating system module, and application software module, is first proposed. Then, a PC-based Open Robot Controller(PC-ORC), which can reconfigure robot control systems in various production environments, is developed. The PC-ORC is built upon the object-oriented method, and allows an easy implementation and modification of various modules. The PC-ORC consists of basic softwares, application objects, and additional hardware device on the PC Platform. The application objects are: sequencer, computation unit, servo control, ancillary equipment, external sensor control, and so on. In order to demonstrate the applicability of the PC-ORC, the proposed PC-ORC configuration is applied to an industrial SCARA robot system.

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2004.10a
• /
• pp.73-77
• /
• 2004

This paper presents a PC-based controller of industrial SFFS(Solid Freeform Fabrication System). The SFFS has multiple sub-controllers for the building room, the powder room, the temperature, and the density of oxygen in the chambers. Hence the main PC-based controller should effectively and timely send commands to the sub-controllers, and monitor the overall SLS process. The required actuators and sensors are selected to optimize the overall performance of the SFFS.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.30 no.2A
• /
• pp.90-97
• /
• 2005

Generally, DAB systems are divided into two categories, a stand-alone type and a PC/PDA-based type. The PC/PDA-based type has less mobility comparing to the stand-alone type, nevertheless, it has the advantage of using memory, audio/video decoder, or other resources of PC/PDA. The DAB receiver implemented in this paper is a PC-based receiver system employing USB interface. The USB interface bridge is designed using FPGA and EZ-USB development kit and the implemented DAB receiver adopts the bridge and makes use of the stand-alone typed DRK-026 receiver for experiments. The USB interface bridge transforms serial data into USB packets and all of related signals are controlled by hardware logics. The operation of the implemented DAB receiver is verified by sending audio data into the PC for decoding through USB interface bridge.

• Journal of the Korea Society of Computer and Information
• /
• v.20 no.12
• /
• pp.61-66
• /
• 2015

In this paper, we draw a security assessment by analyzing possible vulnerabilities of the designated PC service which is supposed for strengthening security of current online identification methods that provide various areas such as the online banking and a game and so on. There is a difference between the designated PC service and online identification methods. Online identification methods authenticate an user by the user's private information or the user's knowledge-based information, though the designated PC service authenticates a hardware-based unique information of the user's PC. For this reason, high task significance services employ with online identification methods and the designated PC service for improving security multiply. Nevertheless, the security assessment of the designated PC service has been absent and possible vulnerabilities of the designated PC service are counterfeiter and falsification when the hardware-based unique-information is extracted on the user's PC and sent an authentication server. Therefore, in this paper, we analyze possible vulnerabilities of the designated PC service and draw the security assessment.

• Proceedings of the KIEE Conference
• /
• 1999.11c
• /
• pp.763-765
• /
• 1999

Due to the improvement of PC Performance and Windows-based OS, PC-based control system is gradually taking over industrial control in the industry site. In this paper, we suggest the method to configure PC-based fault diagnosis system of I/O cards and the method to generate test signals to find out the short conditions of adjacent channels of cables which connect I/O cards with terminal blocks.

• Proceedings of the KSME Conference
• /
• 2000.04a
• /
• pp.884-889
• /
• 2000

This paper describes the design and implementation of PCOAMC(PC-based Open Architecture Machine Controller) to be flexible and independent from the vendor-oriented hardware and software structure. This openness approach is able to enhance an intelligence and integration of a manufacturing system. The development methodology of PcOAMC is an Object-Oriented approach, and all modules in PcOAMC are modelled using UML(Unified Modelling Language) that provides an easy understanding and modification. In order to demonstrate an applicability of PcOAMC, a simple test has been executed by using the Client-Server system consisting of two PcOAMCS and bus monitoring system. The good results have been obtained, so that the developed controller is expected to be embedded into IMS(Intelligent Manufacturing System) as a basic unit.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2007.10a
• /
• pp.593-599
• /
• 2007

PC based DVR replaces existing analog CCTV system therefore expands the field and DVR is used for monitoring and security so it requires exact time(clock). But DVR system can't maintains exact clock causing several reasons. For providing exact time information we should use additional system. For economical and usable environment, using GPS system is most suitable suggested solution than use WAN(Wide Area Network). Therefore in this paper for analysis the result of PC based DVR's system clock using GPS system, 1) clock source receiving module that receives the clock form GPS satellite and 2) GPSW H/W units that provide clock source to PC Based DVR 3)Daemon software named PCSW which adjust PC's clock so system could reduced the clock difference with UTC clock and measured the result.

• Proceedings of the IEEK Conference
• /
• 1998.06a
• /
• pp.491-494
• /
• 1998

Due to the improvement of PC performance and windows-based OS, PC-based control system is gradually taking over industrial control in the industry site, replacing the closed proprietary syste. PC-based system gives the avantages of ease-of-use, cost-effectiveness, simplicity of maintenace and the flexibility to design I/O system using standard technology. While there are many real time software soltions, most of hardware solutions are closed, vendor-depednent, proprietary systems for large scale plants. In this paper, we suggest the method to configure PC-based I/O system based on standard technology which gives the avantages to use off-the-shelf products for system integration.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
• /
• 2006.06a
• /
• pp.59-60
• /
• 2006

Principals and characteristics of sensors can be easily understood by experiments based on PC. Applied experiments help further understanding sensor's wide utilization. Moreover, PC based operation makes stored sensor data to be used in Excel for various charts and graphs.

• The Journal of Korean Association of Computer Education
• /
• v.11 no.1
• /
• pp.97-107
• /
• 2008

The result verification that determines correctness for the work results calculated in each PC is one of the most important issues in PC grid environments. In this literature, voting-based and trust-based schemes have been mainly used to guarantee the correctness of work results. However, these schemes suffer from both waste of resource utilization and high computation delay because they can not effectively cope with dynamic computational environments. To overcome these shortcomings, we introduce the distribution information of PC resources based on credibility and availability into result verification phase. Using this information, we propose a new result verification scheme, which can determine the correctness of work results by each PC resources' credibility and cope with the dynamic changing environments by each PC resources' availability. To demonstrate the efficiency of our result verification scheme, we evaluate the performance of our scheme from the viewpoints of turnaround time and resource utilization, utilizing resource distribution information in the Korea@Home that is a representative PC grid system in domestic. We also compare the performance of our scheme with that of other ones.