• Journal of the Institute of Convergence Signal Processing
• /
• v.15 no.1
• /
• pp.15-22
• /
• 2014

This paper presents the implementation of a control system of pellet boiler using wood pellet as carbon neutral material. The system also has the additional features to provide remote controlling and monitoring based on home networking technology through either public switched telephone networks or mobile communication networks. It consists of three kinds of sub-modules; a main controller provides basic and additional features such as a setting of temperature, a supplying of wood pellet, a controlling of ignition and fire-power, and a removing of soot. The second is temperature controller of individual rooms which is connected to the main controller through RS-485 links. And interface modules with PSTN and mobile networks can support remote controlling and monitoring the functions. The test results under the heating area of $172m^2$ show a thermal efficiency of 93.6%, a heating power of 20,640kcal/hr, and a fuel consumption of 5.54kg/hr. These results are superior to those of the conventional pellet boilers. In order to obtain the such high performance, we newly applied a 3-step ignition flow, a flame detection by $C_dS$ sensor, and a fire-power control by fine controlling of shutter to our pellet boiler.

• Journal of IKEEE
• /
• v.23 no.2
• /
• pp.739-742
• /
• 2019

In this paper, we propose enhanced DAP(Dose Area Product). The development of enhanced DAP proposed in this paper has optimized the area dose meter that was developed previously. The development of enhanced DAP performed Optimized design of charge integrator and ADC circuit, optimization of line transceiver for RS-485 communication, optimization of display circuit, and optimization of PC-based control program for interlocking and aging. As a result of evaluating the performance of the proposed system in an accredited testing laboratory, Radiation dose dependence and Radiation quality dependence were measured to be 4.2%, which is below ${\pm}15%$ of international standard. Energy range/Tube voltage was confirmed in the range of 30~150kV. The sensitivity difference between sensor field and sensor field area dose sensitivity was measured to be 4.3%, and it was confirmed that it operates normally under ${\pm}15%$ of international standard. In order to measure the reproducibility of the area dosimeter, it was confirmed that it was 0% and it was operated normally at less than 2% of IEC60580 recommendation. Digital resolution was confirmed to be a minimum unit of $0.01{\mu}Gy{\cdot}m^2$ within the error range for the reference dose per hour.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.23 no.4
• /
• pp.35-40
• /
• 2023

For the EMC test, the radiation characteristics and immunity characteristics of the EUT are measured under the condition that the EUT maintains its normal operation. For normal operation of the EUT, it is necessary to operate the EUT and monitor its status through separate equipment outside the anechoic chamber. External equipment operates and monitors the EUT through various communications such as 1553B communication, RS-485 communication, and Ethernet communication. At this time, external equipment can transmit noise through the communication line. This noise is transmitted to the LISN through the connected power cable and measured. It is also radiated through the connection terminal to the LISN. In this case, the communication line is the power line It should be designed so that noise is not transmitted through electromagnetic isolation as much as possible. In addition, noise from external equipment must be suppressed as much as possible from entering the chamber through the communication line. In this paper, external EUT test equipment applied for EMC test It explains the considerations in the design and manufacture of the design and explains the satisfaction of the design through tests including CE and RE.

• Journal of Advanced Marine Engineering and Technology
• /
• v.31 no.2
• /
• pp.182-189
• /
• 2007

This paper describes the implementation of control and monitoring system of ship's lamps at local area using power line communication method, power line modem(PLM). We design modem, microprocessor interface for electric power control by frequency control and analog to digital signal conversion, lamp device. PLM communication is very economical using existing electric power line unlike RS-232, RS-485 communications. We verify and confirm by experimental work that control and monitor lamp system for ship by an PLM communication.

• Proceedings of the KIEE Conference
• /
• 2009.07a
• /
• pp.1779_1781
• /
• 2009

The main contents of this paper is to design a system that can remote control the most of the LED lighting device in the market. In order to realize the device driver, we choose the communication mode Zigbee, PLC, RS232 and RS485. Using client-server system, LED lighting device can be controlled just through web browser.

• Proceedings of the KIPE Conference
• /
• 1999.07a
• /
• pp.88-92
• /
• 1999

This paper aims at developing remote contro system to control and monitor distributed various devices through internet or information communication network. SNMP (Simple Network Management Protocol) and rectifier operated in a row are adopted for network management protocol and applied device, respectively. For controlling and monitoring distributed devices in real-time java-environment software is constructed. Also general-use interface controller between network device and applied device is proposed. Finally, seria communication such as RS-232 and RS-485 is used between controller and applied device.

• Journal of the Korean Society for Precision Engineering
• /
• v.12 no.12
• /
• pp.19-29
• /
• 1995

The basic technology for a production system represented by design, machining, assembly, and inspection, is machining technology such as CNC machine tools. etc. Direct Numerical Control, that effeciently manages NC programs is developing into Distributed Numerical Control that increases the utilization of the machining cell. It has the ability of monitoring and control, in real time, for CNC and periperial equipment. In this study, we develop a Distributed Numerical Control system that has real time and multitasking operation capability for the machining cell with various CNC's. With the consideration of economy, generalization and extension, the system is interfaced with CNC machine tools and periperial device using RS-485 network and RS-232C communication methods.

• Proceedings of the KIEE Conference
• /
• 1998.07f
• /
• pp.2030-2032
• /
• 1998

It is always necessary to high performance power supplies for the magnet system in the accelerator, especially when the number of power supplies are large. When have developed the compact power supply using switching technology instead of SCR phase control. We adopt the pulse width modulation(PWM) method with a half bridge DC/DC converter. In this way, we can make a compact system with light weight and small volume. Actual system we developed is 1.2kW, 35V/35A bipolar DC power supply current precision of +/-0.02%. It is possible to mount 10 unit in a conventional 19 rack. The built in controller has an RS422 protocol to drive 10 unit by one serial port up to 1.2km distance. If we adopt RS485 protocol, one serial port can control 32 power supplies. In this paper, we will report the design and performance of the prototype power supply.

• Proceedings of the KIEE Conference
• /
• 2006.07b
• /
• pp.1171-1172
• /
• 2006

RS-232, RS-485, LAN 등 다양한 네트워크를 통한 모니터링 기술은 통신 기술의 발달과 함께 급속도로 발전해 왔다. 신 재생에너지 분야 또한 다양한 모니터링 기술이 개발되고 선보이고 있다. 모니터링 기술들은 시스템의 정상운전여부, 발전량, 효율 등의 실시간 감시에 유용하게 활용되는 중요한 요소로서 원활한 동작과 시스템의 지속적이고 안정적인 운전을 필요로 한다. 특히, 동시에 여러 데이터를 받아 처리해야 하는 환경적 요소를 내포하고 있어서 Multi-Ch 데이터 처리가 매우 중요하다 할 수 있다. 본 논문에서는 LabVIEW를 이용하여 신재생에너지 시스템에 적합한 Multi-Ch 데이터 처리가 가능한 시스템을 설계 및 개발하고자 하였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 1999.11a
• /
• pp.482-485
• /
• 1999

This paper proposes a remote supervisory controlling system of air compressor that is controlled by 80196KC microprocessor. In proposed monitoring system, air compressor located in long distance can be controlled In any condition by RS-232 serial communication. Change of data and abnormal signal of it can be also obtained. The validity of the proposed monitoring system is verified through digital simulations and experiments for air compressor driven by induction motor.