Thepmanee, Teerawat
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Item type:Publication, Reliability modeling for automatic operation mode of FSWO&FSWB system(2017-06-07) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Foundation fieldbus-based laboratory: A case study of Harmonas-DEO system(2011-01-01); ; ; Julsereewong, PrasitThis paper presents a Foundation Fieldbus-based laboratory for education of automation infrastructure. Design and implementation of a level-control plant model using multi-vendor field devices is proposed. Harmonas-DEO fieldbus system is described as an illustrative case study for configuring and commissioning fieldbus segment, defining control strategy, designing human machine interface (HMI) screen, and troubleshooting. Fieldbus control valve diagnostics based on the use of Valstaff are also included. © 2011 SICE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Digital fieldbus-Analog system integration for revamping projectsThis paper presents a system integration of modern digital fieldbus and traditional analog devices for revamping projects. Using temperature transmitter with Foundation Fieldbus technology and power regulator with 4-20 mA control input for temperature control based on a PID instruction of programmable logic controller (PLC) is examined as an illustrative case study. A portable plant model was designed and implemented for real hands-on training. In addition, basic network and device configurations as well as ladder logic program and graphical user interface creations are discussed. Experimental results of temperature control in the range of 40-60 °C verifying the proposed concept are also included. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Sil assessment for tail gas treating process using layer of protection analysis(2018-06-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Automatic SPRT module calibration using automated low thermal matrix scanners(2011-08-12); ; Masuchun, RuedeeIn general, the process of the SPRT module calibration takes long time and requires all employees participation in the calibration process, and it also requires an expert for calculation of results and measurement uncertainty. All of these waste a vast amount of working time. Therefore, this paper provides the automatic SPRT module calibration process which can reduce the steps of calibration, resulting in process time reduction and the automatic process doesn't require the expert to calculate results and measurement uncertainty. © 2011 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Using genetic algorithm to manage and schedule temperature sensor calibration(2011-01-01); Masuchun, RuedeeCurrently, generating a schedule to calibrate temperature sensors for both laboratory calibration and field calibration are very time-consuming and inefficient, especially when several temperature sensors await for being calibrated and the due dates are required to be specified in advance. General rule of thumb used is first-come-first-served but the due date is difficult to determine in advance. Moreover, overview of which standards will be required and, if required, at what temperatures each of them should be set to cannot be globally visualized. Another method is to calibrate those temperature sensors requiring same temperature together but the experience is strictly required to avoid overwhelming calculation time. This paper presents the application of scheduling technique using genetic algorithm to schedule temperature sensor calibration. The fitness function is to minimize the time required to calibrate all temperature sensors. Our method takes little time to generate good schedule while the due date of each temperature sensor can be at once stated and the global view of required standards can be anticipated for further preparation. Moreover, our method is easy to use and suitable for anyone without the experience in scheduling temperature sensors. © 2011 ISSN. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Using wired hart and wirelesshart together for PLC and SCADA system(2015-01-01); ; ; Subpayasomboon, SirametWireless Technology has promoted in the process automation because it does not require power and communication wiring for field instruments that enables reduced engineering cost. At the same time, end-users consider the developments of process automation by using wireless devices due to the growing of the new plants and replacing analog or wired HART plants. The paper presents a technique to modify wired HART device to be WirelessHART device and to configure it for communication with other WirelessHART devices. A PLC (Programmable Logic Controller) and SCADA system is used to provide centralized device information, historian, and HMI. Installation and configuration techniques of wired HART, THUM adapter or repeater, WirelessHART, HART gateway are described. In addition, engineering and SCADA software are assigned based on OPC to share WirelessHART data with gateway, PLC and SCADA system. The experimental results by using S7-300 Siemens PLC, WW InTouch, and HART devices in level process control are included to confirm the system workability. Moreover, the technique could be applied to collect data for end-user support to quickly and easily gain the benefits of device diagnostic and to decide the plant operation and planning. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A mathematical model evaluation for the standard uncertainty of Temperature uniformity(2016-09-06) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Design of a switched-capacitor-based serial DC-DC converter using clean energy power supplies(2010-07-30); ; Tirasesth, KittiFor mobile back-lighting applications, a switched-capacitor-based serial DC-DC converter using solar power supplies is proposed in this paper. Unlike conventional switched-capacitor DC-DC converters, the proposed converter pushes up the output voltage of a switched-capacitor-based circuit by the voltage of solar cells. For this reason, the proposed converter can realize not only long battery runtime but also small hardware-cost and wide input-range. Concretely, in comparison with the conventional parallel converter using 1.5× step-up SC converters, the proposed converter can achieve 20% reduction of hardware cost and 16% extension of input range. The characteristics of the proposed converter are clarified by theoretical analyses. Furthermore, SPICE simulations and experiments show the validity of circuit design, where theoretical results correspond well with simulation results. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Integration of wireless HART network system into SCADA software for operation & management(2016-11-18); ; This paper describes the technique to integrate HART field devices into SCADA (Supervisory Control and Data Acquisition) system. Wire HART field device is connected to WirelessHART adapter (THUM) and WirelessHART device are assigned act as RTU(Remote Terminal Unit) in SCADA system. In system, THUM and WirelessHART device communicate to WirelessHART gateway that collects their data and send to master station with Modbus/TCP. The paper presents the practices to install and configure the THUM with control valve wire HART device, WirelessHART transmitter, tags assignment, and so on that focus for HART parameters mapping in order to device operation and management. Effectiveness of the proposed system integration is verified by simulation and experimental results. Moreover, the technique can be applied in existing plants or in new project to support end-users to quickly and easily gain the benefits of device diagnostic and decision support for operation and management.