Julsereewong, Amphawan

Preferred name

Alternative Name

Julsereewong, A.

Main Affiliation

School of Engineering

amphawan.ju@kmitl.ac.th

Now showing 1 - 10 of 27

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Study on field control locations for Foundation Fieldbus-based cascade control loop
(2012-01-01)
Julsereewong, Amphawan
;
Julsereewong, Prasit
;
Dejsiriphant, Thipat
This paper focuses on implementing cascade control in the field using Foundation Fieldbus technology. The key consideration is the assignment of master and slave PID block locations in Fieldbus devices for minimizing network traffic without negative impact on an ability to control the process. A plant model using multi-vendor Fieldbus devices for level-to-flow cascade control is described as an illustrative case study. This paper examines calculated macrocycle timing schedules produced by the DeltaV system for six possible field control locations of the PID blocks. Experimental results obtained from the preferred field control location with minimum number of scheduled data transmissions over the network are also included. © 2012 SICE.
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Foundation fieldbus-based laboratory: A case study of Harmonas-DEO system
(2011-01-01)
Thepmanee, Teerawat
;
Pongswatd, Sawai
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Julsereewong, Amphawan
;
Julsereewong, Prasit
This 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.
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Comparative study on cascade control configuration in engineering phase for analog system and FF system
(2017-02-06)
Khochasin, Narupon
;
Trisuwannawat, Thanit
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Julsereewong, Prasit
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Julsereewong, Amphawan
This paper presents a comparative study of two configuration techniques for building cascade control loops in engineering phase by using traditional analog system and modern digital Foundation Fieldbus (FF) system. For both analog and FF systems, control strategy configurations for providing the process control loop with high safety and the process control loop with high availability are described. The engineering software of the CentumVP host system is used to build the studied control systems, and it is also employed to check the consistency of the configurations. Comparison results show that the smart FF devices provide powerful functionalities for ease of engineering to take special actions in the events of undesired conditions. In addition, the results from the studied cases can be the practical guideline to configure the interlocks that are essential for system safety and availability.
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Simple resistance-to-time converter with lead-wire-resistance compensation
(2011-01-01)
Julsereewong, Prasit
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Julsereewong, Amphawan
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Rerkratn, Apinai
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Pootharaporn, Nakorn
This paper presents a simple resistance-to-time converter for remotely measuring resistance of single resistive sensors. The proposed circuit employs commercially available devices to generate the output pulse whose time interval is linearly proportional to the sensing resistance. Experimental results are given to confirm not only the good operation but also the effective lead-wire-resistance compensation of the proposed converter. © 2011 SICE.
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Interface circuit using operational conveyors for differential resistive sensors
(2013-09-02)
Julsereewong, Amphawan
;
Julsereewong, Prasit
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Rungkhum, Tipparat
;
Sasaki, Hirofumi
In this paper, a simple and accurate circuit for interfacing differential resistive sensors is presented. The realization method employs three operational conveyors as active elements to provide voltage output linearly proportional to sensing resistance change. The performance is confirmed through PSPICE simulation and experimental results. © 2013 IEEE.
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Low-cost instrument for oscillometric blood pressure measurement
(2015-01-01)
Wongjan, Anan
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Julsereewong, Prasit
;
Julsereewong, Amphawan
This article presents a technique for design and implementation of a lowcost microcontroller-controlled instrument for noninvasive blood pressure (NIBP) measurement based on oscillometric method. The proposed measuring device consists of a HEM-CR24 cuff for wrapping around a subject’s upper arm with automatic inflation, SCX pressure sensor, pneumatic subsystem, circuitry subsystem, PIC18F452 microcontroller, and LCD display module. The systolic blood pressure (SBP), diastolic blood pressure (DBP), and heart rate (HR) can be simultaneously measured and digitally displayed. The performance of the proposed instrument is confirmed through calibration results by using the BP Pump 2 NIBP monitor tester.
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Simple linearization technique for remotely measuring resistance changes
(2011-08-01)
Julsereewong, Amphawan
;
Julsereewong, Prasit
;
Rungkhum, Tipparat
;
Sasaki, Hirofumi
;
Isoguchi, Hiroshi
A simple linearization technique for remotely measuring resistance changes of single-element resistive-type sensors is presented in this article. The proposed circuit configuration uses commercially available devices to generate the output voltage, which is linearly proportional to the sensing resistance change. PSPICE simulation results are included to confirm not only the good operation but also the effective lead-resistance compensation of the proposed technique.
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Improving process data reporting system using IT process automation software in sulfuric acid production
(2012-12-01)
Sookjadit, Sakchai
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Thepmanee, Teerawat
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Julsereewong, Amphawan
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Julsereewong, Prasit
This paper presents a method to improve process data reporting system in a sulfuric acid plant, which faced difficulties in accessing historical process data for effective use in process engineering, production management, quality management, and maintenance system. The proposed method running on existing distributed control system is based on the use of an IT process automation software called OpalisRobot to provide scheduled logging, reporting, and e-mailing criteria and quality control parameter files. Experimental results verify that not only ease of accessing and reporting electronic documents for use of production data and some economic benefits of the proposed work can be obtained, but also errors caused by manual records affecting to final product quality, environmental quality, instruments, safeguarding process equipments, and operator safety can be reduced. © 2012 ICROS.
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Design and implementation of the laboratory for foundation Fieldbus-Based industrial automation
(2012-05-01)
Thepmanee, Teerawat
;
Pongswatd, Sawai
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Julsereewong, Amphawan
;
Julsereewong, Prasit
This article focuses on a design and implementation of the laboratory for education of Foundation Fieldbus-based industrial automation. A Centum VP system connected with level-control plant model via field digital network is described as an illustrative case study for configuring and commissioning fieldbus segment, defining control strategy, designing human machine interface (HMI) screen, and troubleshooting.
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Improving vacuum pan crystallization for cane sugar industry
(2011-08-01)
Puaughom, Charoenchai
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Pankarnchanato, Phichet
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Limsutthiphong, Pornchai
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Julsereewong, Prasit
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Julsereewong, Amphawan
This article focuses on an improving crystallization system to upgrade raw cane sugar production. The proposed technique uses a continuous vacuum pan branded DECHAROEN™ to replace the traditional batch vacuum pan without crystal quality problems. Surpassing the early use of batch type, the employ of new continuous type providing technical advance and ease of full automation affords significant improvements in saving energy, reducing loss of sucrose, and expanding production capacity. Its economic benefits are now gladly accepted in 6 cane sugar manufacturers in China and Thailand, whose crystallization process employs the new DECHAROEN™ vacuum pan. © 2011 ISSN 1881-803X.

Julsereewong, Amphawan

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