• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2003.05a
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• pp.439-442
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• 2003

In this paper, a system that implementation of Access Control System Using Biometric System. Biometrics is science which deals with verifying or recognizing using physiological or behavioral characteristic Access Control System uses Biometric system to make an access control system. Biometrics goes under the study of bio-recognition or bio-measurement. It is a technology or study that identifies individuals using one's Biometric character. Access control system is a system used to identify one's entrance and exit, personal management, and security. Access control system can be joined with Biometric system to produce easier use and more sufficient effects. Access control system using Wiegand (Data Format) signal output, can replace earlier RF Card systems and make an access control (security) system. It uses RS-232, Rs-422 or TCP/IP type communication with the computer so an embedded system can be controlled using the software.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.8 no.2
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• pp.494-498
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• 2004

In this paper, a system that implementation of Access Control System Using Biometric System. Biometries is science which deals with verifying or recognizing using physiological or behavioral characteristic Access Control System uses Bionietric system to make an access control system. Biometrics goes under the study of bio-recognition or bio-measurement. It is a technology or study that identifies individuals using one's Biometric character. Access control system is a system used to identify one's entrance and exit, personal management, and security. Access control system can be joined with Biometric system to produce easier use and more sufficient effects. Access control system using Weigand (Data format) signal output, can replace earlier RF Card systems and make an access control (security) system. It uses RS-232, Rs-422 or TCP/IP type communication with the computer so an embedded system can be controlled using the software.

• Proceedings of the KIEE Conference
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• 2003.04a
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• pp.402-404
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• 2003

Radio frequency identification (RF-ID) is an automatic data capture (ADC) technology that comprises small data-carrying device(is called Tag) and fixed or mobile device(is called reader). Tags are attached or deattached device. Readers may be installed at locations where data capture is required, and may also be in the form of portable readers. In this paper, we are proposing an application for the subway station using the RF-ID system and a system for the gateless fare collection passing through the booth in only carrying the card. In this system that RF-ID system and Bluetooth are applied. We designed two wireless communication channels. One is the 125kHz communication channel by FSK and PSK for power supplying on the card and identification and the other is 2.4GHz channel for the collection.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.48 no.1
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• pp.1-6
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• 2011

We have developed the process of forming one body S-type cantilever probe in the recessed trench for fine-pitched MEMS probe card. The probe (cantilever beam and pyramid tip) was formed using Deep RIE etching and wet etching. The pyramid tip was formed by the wet etching using KOH and TMAH. The process of forming the curved probe was also developed by the wet etching. Therefore, the fabricated probe is applicable for the probe card for DRAM, Flash memory and RF devices tests and probe tip for IC test socket.

• The KIPS Transactions:PartA
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• v.10A no.3
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• pp.255-260
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• 2003

In recent, as a typical example of RFID, the contactless IC card is widely used in traffic, access control system and so forth. And its use becomes a general tendency more and more because of the development of RF technology and improvement of requirement for user convenience. This paper describes the hardware module to process embedded contactless protocol for implementation contactless IC card. And the hardware module consists of analog circuits and specific digital logic circuits. This paper also describes more effective design method of contactless IC card, which method separates into analog circuit parts, digital logic circuit part, and software parts according to the role of the design parts.

• Proceedings of the KSR Conference
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• 2011.05a
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• pp.1148-1154
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• 2011

Vending machines to release single-use RF(Radio Frequency) transport cards at Seoul Metro stations are operated under unmanned facility and have release & charge function. This Paper introduces function, configuration of vending machine to release single-use RF transport cards, the basic concepts & overview about vending machine's operating system. And suggests programming procedure to develop OS image of Windows Embedded operating system which is onboard the main board's electronic circuitry.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2003.05a
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• pp.435-438
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• 2003

The MS card data transfer system using blue-tooth protocol ran communicate the MS card data wirelessly and does not take an extra communication expense which is a weakness point of existing wireless communication system. This Blue-tooth system, which has excellent security and no extra communication expense, can efficiently communicate data of the place ,where can be solved with small scale wireless network, such as the theme-park or gasoline-station. Existing wireless communication system compose network using wireless-LAN protocol which has extra communication expense, or with RF protocol which has poor security. But this system suitable for LAN because it has not extra communication expense and it has excellent security cause frequency-hopping of Blue-tooth protocol. The MS card data transfer system using blue-tooth protocol has low power, high performance RISC processor and large scale 16-gray graphic LCD which is suitable for portable unit. The MS card data transfer system can efficiently control depot for a long time because it has low power, excellent security and no extra communication expense.

• Proceedings of the KSR Conference
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• 2007.05a
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• pp.1908-1912
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• 2007

The metropolitan area needs to control the Automatic Fare Collection (AFC) and transportation card system in order to implement an efficient railway and subway. This paper introduces a suitable analysis to take advantage of the systematic method of the AFC and transportation card. These systems should consider the fare system, transportation pass and AFC equipment, which are organized with the Automatic Ticket Vending Machine, the Ticket Office Machine and the Card System of Radio Frequency (RF). However, the organization includes the fact the Automatic Ticket Vending Machine has a problem with the proceeding speed of passengers and inconvenience. Second, the majority of passengers have not utilized the Ticket Office Machine. Also, it should consider whether the transportation card is the proper system in the metropolitan area. Based on the analysis of national and international cases, it suggests that the AFC should make more improvements in the metropolitan area railway and subway.

• Proceedings of the KIEE Conference
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• 2001.04a
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• pp.423-425
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• 2001

In this paper, RF-ID system is used in gateless fare collection for the subway system. This enables passengers to go in and out of stations without any actions specifically for fare collection, such as carrying out from the purse at the gate, throwing tickets into gate machines or moving RF-ID cards near to the card readers. Card check zone system might extract fare from two or more cards that one person carries.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.1
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• pp.151-157
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• 2009

This project would discuss how to improve the limit and enhance the accuracy and confidence and the improved algorithm path searching engine module shelter's interference limit on spot searching and analysing by using real time path finding technology and USB memo교 RF which is fused to a Tag(u-Card).