• Journal of Animal Environmental Science
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• v.1 no.1
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• pp.21-38
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• 1995

The objective of this study was to review and analyze the application technologies of electronics and microprocessor for environment control and automated management systems of livestock production of the advanced countries, and to select the appropriate and applicable technologies for our systems among the analyzed. In this study, the environment control systems were analyzed mainly on the poultry production systems and the automated management systems on swine and dairy production systems. According to the results, the advanced technologies reviewed and analyzed could be applicable for designing our animal production systems, if those were modified and remodeled for our situation.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.10a
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• pp.459-462
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• 2002

This paper presents the development or a keypad test system for the improvement or the working environment and productivity improvement using the microprocessor PIC16F877 Chip. In order to detect the fault of keypad products, the design of hardware and software is performed in this system. All controls of the system is implemented by the 8 bit one chip micro-controller PIC. This keypad test system can also recognizes the work process, the work result and the fault position of the keypad which is made by the method of a flexible printed circuit (FPC) and construct the database about test results using personal computer. The experimental results show the effective performance of the keypad test system.

• Journal of Biomedical Engineering Research
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• v.7 no.1
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• pp.21-34
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• 1986

In this paper, we described the ECG telemetry system via the Public Telephone Line. The system consist of a signal acquisition and measurement section, a signal processing section, and a signal transmission section. It used 8 bits microprocessor. The transmission section is composed of 3 ch. analog modulators and 1 ct. digital modem. Especially, using the digital modem, signal is transmitted with about 50n data reduction ratio by the TP (Turning Point) algorithm. The acoustic coupler or inductive coil for linking the public telephone line are used. The speed of the digital modem is 300 baud rate. The MCBS (Multi Channel Biotelemetry System) is tested and evaluated through the experiment.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 2004.06a
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• pp.101-105
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• 2004

본 논문에서는 온도 센서로부터 얻어지는 데이터를 전송하고 실시간으로 처리하기 위하여 RF방식을 이용한 단 방향 데이터 전송 시스템을 설계하고 그 특성을 측정하였다. 설계된 무선 전송기능의 온도 측정 시스템은 온도센서 및 제어부, 데이터 전송용 RF module로 구성되었다. 온도 측정을 위한 센서는 AD590 전류 구동 형 전압출력 센서이며 제어부는 PIC one-chip microprocessor를 사용하였다. 또한 데이터의 무선 전송을 위해 433MHz 주파수 대역의 반 이중 RF Module을 사용하여 system을 구현하였다. 실험은 10M 이내의 실내 공간 내에서 수행되었고, 임의의 온도측정 구간에 따른 온도 변화 환경에서 3가지 경우의 (3M,5M,10M) 거리 변화를 두고 데이터를 측정 및 비교 분석하였다. 실험결과 10M 이내의 거리에서는 온도센서로부터 얻어진 데이터를 실시간으로 송수신하여 결과를 처리할 수 있었으며 이를 이용한 다중 Sensor 시스템 구현이 가능한 결과를 얻었다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.27 no.4C
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• pp.388-397
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• 2002

We designed a SIMD-DSP/FPU that can efficiently improve multimedia processing performance when integrated into high-performance embedded microprocessors. We proposed partitioned architectures and new schemes for several functional units to reduce chip area. Sharing functional units reduces the area of FPU significantly. The proposed architecture is modeled in HDL and synthesized with a 0.35$\mu\textrm{m}$ standard cell library. The chip area is estimated to be about 100,000 equivalent gates. The designed unit can run at higher than 50MHz clock frequency of CPU core under the worst-case operating conditions.

• Proceedings of the KIEE Conference
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• 1988.07a
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• pp.105-108
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• 1988

In this paper, a control system design method is proposed for DC motor drive. A state space model is used to control sysytem and for closed loop system the technique of pole assignment is applied. The control system is designed with state feedback theory and to improve the response further more feedforward theory is applied to control system. The microprocessor as a controller and the interfaces in the system are proposed. Digital simulation results for step changes in reference velocity and load torque are shown.

• The Transactions of the Korean Institute of Electrical Engineers C
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• v.53 no.11
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• pp.572-576
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• 2004

Various devices for diagnosing arrester soundness are suggested, and most of them simply measure magnitude of leakage current. However, such kind of devices do not provide detailed information needed for the diagnosis. In this study, we designed and fabricated a new arrester analyzer by means of measuring the magnitude, the phase vs. wave height and the harmonics of total leakage currents. The analyzer is composed of a current detector, an optical linker, and a main device operated by a microprocessor. The main device is connected with leakage current detector optically not to be influenced by electromagnetic interference. The analyzer developed measures only total leakage currents, but analyzes most parameters needed for the arrester diagnostics.

• The Transactions of the Korean Institute of Electrical Engineers D
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• v.54 no.3
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• pp.191-193
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• 2005

This paper proposes a phase measurement algorithm which is based on the recursive implementation of sliding-DFT. The proposed algorithm is designed to have a robust behavior against the erroneous factors of frequency drift, additive noise, and twiddle factor approximation. Four channel power-line phase measurement system is also designed and implemented based on the time-multiplexed sharing architecture of the proposed algorithm. The proposed algorithm's features of phase measurement accuracy and its robustness against the finite wordlength effects can provide a significant impact especially for the ASIC or microprocessor based embedded system applications where the enhanced processing speed and implementation simplicity are crucial design considerations.

• Proceedings of the KIEE Conference
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• 2001.04a
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• pp.109-112
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• 2001

In this paper, the development of the prototype electric vehicle for golf car is described. A brushless dc (BLDC) motor is applied as a prime mover. The BLDC motor is coupled directly to the reduction and differential gear system. The output power of the motor is decided to 2.2Kw at 3000 rpm, which is a general value of the golf car on the market today. The motor is driven by the microprocessor-based 3-phase PWM inverter system. We introduce the performance and functions of the BLDC motor and it's control system.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2003.05b
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• pp.154-158
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• 2003

In this study, to measure the density of compaction, it is designed to use the 5 gamma-ray detectors. The developed instrument consists of measuring circuits for gamma-rays and thermal neutrons, a high voltage supply unit, stable circuit unit, count circuit unit and a microprocessor. To read count pulse from gamma-ray detectors are very accurate and it can be count to data calibration excluded count of ripple.