• 한국산학기술학회논문지
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• 제8권6호
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• pp.1363-1368
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• 2007

태양광 발전이나 풍력발전과 같은 신재생 에너지를 효과적으로 사용하기 위해서는 고성능 축전지 충 방전 컨트롤러가 필수적이다. 본 논문에서는 PIC 마이크로프로세서를 사용한 태양광 발전 축전지 충방전 컨트롤러를 설계, 제작하였다. 컨트롤러의 핵심이 되는 제어부는 정확하고 안정된 동작을 위해서 산업용 마이크로프로세서인 PIC16C711를 사용하였고 제어프로그램은 CCS-C 언어로 작성하였다. 사용자의 편리성을 향상시키기 위해 낮에도 축전지 전원을 사용할 수 있도록 설계하였으며, 전류 조정 기능으로 향후 신소재 개발에 따른 다양한 축전지에 대응할 수 있게 하였다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2002년도 추계학술대회 논문집
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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.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2003년도 춘계학술대회 논문집
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• pp.1063-1066
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• 2003

A flow-meter and its measurement controller was developed for a hydraulic system. This study, for development of positive displacement flow-meter, consist of PIC(Peripheral Interface Controller) controller with MR(Magneto-resistive) sensors. This flow-meter is used valve position indicator for valve control system by hydraulic. The MR sensors are used for the rotation of OVAL gear that detecting device. In the ship environments, consideration that necessary explosive proof. Thus electro device or electro flow-meter needs explosion design for electric circuit. We designed noncontact type flow-meter and evaluated the safety and measuring abilities.

• Journal of Electrical Engineering and Technology
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• 제13권5호
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• pp.1886-1900
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• 2018

This paper proposes a confronting feedback control structure and controllers for positive output elementary super lift Luo converters (POESLLCs) working in discontinuous conduction mode (DCM). The POESLLC offers the merits like high voltage transfer gain, good efficiency, and minimized coil current and capacitor voltage ripples. The POESLLC working in DCM holds the value of not having right half pole zero (RHPZ) in their control to output transfer function unlike continuous conduction mode (CCM). Also the DCM bestows superlative dynamic response, eliminates the reverse recovery troubles of diode and retains the stability. The proposed control structure involves two controllers respectively to control the voltage (outer) loop and the current (inner) loop to confront the time-varying ON/OFF characteristics of variable structured systems (VSSs) like POESLLC. This study involves two different combination of feedback controllers viz. the proportional integral controller (PIC) plus sliding mode controller (SMC) and the fuzzy logic controller (FLC) plus SMC. The state space averaging modeling of POESLLC in DCM is reviewed first, then design of PIC, FLC and SMC are detailed. The performance of developed controller combinations is studied at different working states of the POESLLC system by MATLAB-Simulink implementation. Further the experimental corroboration is done through implementation of the developed controllers in PIC 16F877A processor. The prototype uses IRF250 MOSFET, IR2110 driver and UF5408 diodes. The results reassured the proficiency of designed FLC plus SMC combination over its counterpart PIC plus SMC.

• 한국정밀공학회지
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• 제21권10호
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• pp.94-101
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• 2004

This paper presents the development of a keypad test system for the improvement of working environment and productivity using PTC 16F877 microprocessor. In order to detect the fault of keypad products, hardware and software design is performed in this system. Keypad fault detection system is controlled by the 8 bit one chip PIC microcontroller for the exactness and speed. Developed panel of the keypad test system is comprised of the sub-panel for selecting in the inspected keypad types and the main panel f3r displaying the working order and fault position. Furthermore, all data from keypad inspection are stored in main memory of personal computer for the database. All these functions lead to the improvement of working speed and environment.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 학술회의 논문집 정보 및 제어부문 A
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• pp.299-303
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• 2003

Position decision system embody to interpret for observation target position. Observation target is observed at observation post of 3 places. CCD cameras of observation post is achieved turning control by stepping motor. Controller interpret observation target's position to use direction and angle information of observation post. Controller and observation post used PIC16F877. PIC16F877 achieves rotation control of stepping motor and distance arithmetic of observation target. Result that measure this system 50 times was achieved correct position interpretation of 47 times. Position interpretation failure of 3 times was construed for cause in used controller special quality.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.145-149
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• 2001

This paper did so that may can establish optimum temperature according to kind of vaccine and digitalized various action situations using PIC 16C74A-04A/SP. Also, PID Algorithm Controller designed to maintain optimum temperature using PIC. Begin to operating system after temperature setting, reached in optimum storage temperature within 30 minutes.

• 한국산학기술학회논문지
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• 제4권2호
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• pp.63-70
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• 2003

본 논문에서는 반도체 제조장비의 핵심 부품 중에 하나인 질량유량제어기(MFC, Mass Flow Controller)클 설계하고 구현하였다 Microchip社의 마이크로콘트롤러(Microcontroller) PIC 16F876을 사용하여 개발된 MFC는 여러가지 문제점을 가진 아날로그(Analog) 방식의 MFC와 고가의 DSP(Digital Signal Processor) 및 고분해능의 AD변환기(Analog to Digital Convertor)를 사용하는 디지털 MFC의 장점을 혼합한 하이브리드형(Hybrid-Type)이다. 본 논문에서 개발된 MFC는 크게 센서부(Sensor Unit), 제어부(Control Unit), 구동기부(Actuator Unit)로 구성되었으며, 성능향상을 위한 자동보정(Automatic Calibration) 알고리즘과 표준테이블(Reference Table) 방식을 사용하였다.

• 한국정밀공학회지
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• 제21권8호
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• pp.73-82
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• 2004

In this paper, implementation of obstacle avoidance of a nonholonomic mobile robot in unstructured environment is introduced. To avoid obstacles, first, a reference collision-free path for the MR is generated off-line using HJB-based optimal path planning method. A controller is designed using integrator backstepping method for tracking the generated reference path. To implement the designed controller, a control system are needed and composed of camera system and PIC-based controller. The workspace is observed by a ceiling-mounted USB camera as part of an un-calibrated camera system. Thus the positional information of the MR is updated frequently and the MR can get the useful inputs for its tracking controller. The whole control system is realized by integrating a computer with PIC-based microprocessor using wireless communication: the image processing control module and path planning module serve as high level computer control while the device control serves as low level PIC microprocessor control. The simulation and experimental results show the effectiveness of the designed control system.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2003년도 추계종합학술대회
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• pp.348-351
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• 2003

항로표지(Aids to Navigation)란 빛, 형상, 색채, 전파, 음향 등으로 안전한 항로를 표시하여 선박 항행의 안전성을 확보하기 위하여 인위적으로 설치하는 시설이다. 특히, 등대(Lighthouse)는 항로표지 중 가장 중요한 것으로 선박이 육지나 주요 변침점(Turning Point) 또는 선박 위치를 확인하기 위하여 연안에 설치하거나 항만의 소재, 항구 등을 나타내기 위하여 설치한 구조물이다. 본 논문에서는 선박의 입ㆍ출항에 관련하여 선박의 안전을 위해서 설치되어 있는 등대의 효율적인 관리 및 운영을 위한 등대 동기 제어 시스템의 개발에 관한 연구이다. 이를 위해서, 등대 동기 제어 시스템은 하드웨어(컨트롤 박스)와 소프트웨어(제어 프로그램)로 나누어 구성하였다. 하드웨어 모듈은 등대와 선박의 입ㆍ출항에 관한 업무를 담당하는 관제소 사이의 인터페이스를 제공한다. 즉, 등대의 점멸등 제어를 위한 제어부와 등대와 관리 시스템사이의 데이터 전송을 위한 통신 인터페이스를 마이크로컨트롤러의 한 종류인 PIC(Programmable Interrupt Controller)를 이용하여 구성하였다. 소프트웨어 모듈은 시스템 운영자가 등대를 간편하고 효율적으로 관리하기 위해서 GUI(Graphical User Interface) 형태의 인터페이스를 제공한다.