• Annual Conference of KIPS
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• 2010.11a
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• pp.1575-1578
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• 2010

최근 원격에 대한 관심이 높아지면서 서비스 산업 분야에도 원격이 개발되고 있다. 그 중에서 요식업 분야는 원격이 적용되기에 최적의 분야이다. 본 논문에서는 AVR을 활용하여 원격 주문 시스템을 개발 한 것이다. 이 시스템은 서비스 제공자와 서비스 이용자 모두에게 서비스의 질적 향상을 가져다 줄 것이다. 따라서 AVR을 활용한 원격 주문 시스템의 개발은 요식업 분야에서 원격으로 서비스를 제공한다는 측면에서 발전 가능성이 있다고 본다.

• Proceedings of the IEEK Conference
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• 2006.06a
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• pp.961-962
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• 2006

The AMBA(Advanced Microcontroller Bus Architecture) system is one of the most important elements having an influence upon system performance in ARM-based SoC environments. The system guarantees easy connection and good performance as a 32-bit bus system for ARM processors. In this paper, we analyze arbitration algorithms for the AHB bus of the AMBA system and propose an efficient algorithm to improve the performance of the bus system.

• International Journal of Advanced Culture Technology
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• v.8 no.4
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• pp.51-57
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• 2020

A propeller-based seesaw system is a system that can represent one of axis of four propeller drones and its stabilization has been replaced by intelligent control system instead of often used control methods such as PID and state space. Today, robots are increasingly use machine learning methods to adapt to their environment and learn to perform the right actions. In this article, we propose a Q-learning-based approach to control the stability of a seesaw system with a propeller. From the experimental results that it is possible to fully learn the balance control of a seesaw system by correctly defining the state of the system, the actions to be performed, and the reward functions. Our proposed method solves the seesaw stabilization.

• Journal of Institute of Control, Robotics and Systems
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• v.8 no.12
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• pp.1031-1035
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• 2002

The development of the solar and the wind power energy is necessary since the future alternative energies should have no pollution and no limitation. currently power generation system of MW scale has been developed, but it still has a few faults that its operation depends on with the weather condition. In order to solve these existing problems. combined generation system of photovoltaic(400W) and wind power generation system(400W) was suggested. It combines wind power and solar energy to have the supporting effect from each other. However. since the combined generation system cannot always generate stable output with ever-changing weather condition, power compensation device that uses elastic energy of spiral spring was added. In an experiment. when output of system gets lower than 12V(charging voltage), additional power was from the stored rotational energy of spiral spring.

• Proceedings of the IEEK Conference
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• 2004.06a
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• pp.35-38
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• 2004

In this paper, we aim to implement the embedded VoIP Phone based on EISC core Microcontroller. EISC is recently new microprocessor architecture, which contains both advantage of RISC and CISC. This advantages are desirably resulted in high code density, high performance and 16/32/64bit scalable instruction length. Also, we select the embedded system which can be guaranteed performance and economical efficiency for implementation that system. As the step of this research, we first study basic system for implementation of target system. Next, we construct the structure of embedded VoIP Phone based on 32bit EISC MCU efficiently. And then we realize that constructed system and verify the performance of that realized system by the test of voice communication in field.

• Journal of Electrical Engineering and Technology
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• v.12 no.2
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• pp.904-910
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• 2017

This paper presents temperature measurement of solar photovoltaic modules using the custom-made system composed of an infrared temperature sensor and a microcontroller. The obtained measurement results are processed, displayed and stored on a PC using the custom-made virtual instrument. The proposed system overcomes some of the problems related to the contact sensor application, and at the same time offers accurate readings and better flexibility. The proposed system is especially suitable for applications where the cost is a limiting factor in the choice of measuring system. The conducted analysis and the obtained results have shown an excellent accuracy of the proposed system in comparison to a high quality thermal imaging camera used as the reference instrument.

• Journal of the Semiconductor & Display Technology
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• v.17 no.4
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• pp.76-79
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• 2018

In this paper, we developed a pressure monitoring system using silicon pressure sensor. The pressure monitoring system was developed on the basis of a microcontroller, and a self-developed silicon pressure sensor was applied. The pressure monitoring system outputs the current pressure value via UART communication. In addition, it includes a function of displaying by LED when the preset three-step pressure (low, medium, high pressure) is reached. The silicon pressure sensor used in the pressure monitoring system was set to 0 kPa, 10 kPa, 26 kPa, and the pressure monitoring system was evaluated because the measured maximum pressure was in the range of 100 kPa.

• ETRI Journal
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• v.35 no.5
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• pp.943-946
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• 2013

Instead of the extended Kalman filter, the unscented Kalman filter (UKF) has been used in nonlinear systems without initial accurate state estimates over the last decade because the UKF is robust against large initial estimation errors. However, in a multirate integrated system, such as an inertial navigation system (INS)/Global Positioning System (GPS) integrated navigation system, it is difficult to implement a UKF-based navigation algorithm in a low-grade or mid-grade microcontroller, owing to a large computational burden. To overcome this problem, this letter proposes a modified UKF that has a reduced computational burden based on the basic idea that the change of probability distribution for the state variables between measurement updates is small in a multirate INS/GPS integrated navigation filter. The performance of the modified UKF is verified through numerical simulations.

• Journal of Biomedical Engineering Research
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• v.24 no.1
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• pp.45-53
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• 2003

Based on the 4-compartmental pharmacokinetic model developed in PART1, target-controlled infusion(TCI) pump system was designed and evaluated. The TCI system consists of digital board including microcontroller and digital signal process(DSP), analog board, motor-driven actuator, user friendly interface, power management and controller. It provides two modes according to the drugs: plasma target concentration and effect target concentration. Anaesthetist controls the depth of anaesthesia for patients by adjusting the required concentration to maintain both plasma and effect site in drug concentration. The data estimated in DSP include infusion rate, initial load dose, and rotation number of motor encoder. During TCI operation, plasma concentration. effect site concentration, awaken concentration, context-sensitive decrement time and system error information are displayed in real time. Li-ion battery guarantees above 2 hours without power line failure. For high reliability of the system, two microprocessors were used to perform independent functions for both pharmacokinetic algorithm and motor control strategy.

• Proceedings of the KOSOMBE Conference
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• v.1997 no.05
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• pp.330-333
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• 1997

In this paper, we designed a low power and small-sized, light weighted intelligent ambulatory monitoring system using a flash memory card. The system's hardware specifications are as follows: 2 channels, 8bit/250Hz sampling rate, 20M byte storage capacity, a single-chip microcontroller (68HC11E9). To easily interface with PC based system, FFS(Flash File System) was used. We obtained the QRS detection rate of 99.14 through the evaluation with MIT/BIH database.