Roengruen, Prapas

Preferred name

Roengruen, Prapas

Alternative Name

Roengruen, P.

Main Affiliation

School of Engineering

prapas.ro@kmitl.ac.th

Now showing 1 - 10 of 10

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Evaporative estimation using data fusion
(2008-12-01)
Roengruen, P.
;
Tipsuwannaporn, V.
;
Numsomran, A.
;
Harnnarong, Sh
This paper present evaporative estimation of water using data fusion technique. There are many factors in evaporative locating process that provided for consideration together. So this paper will be study about factors with concerning in meteorology that influential to evaporation and explained about relation of these factors by statistical method. The used data obtained from Thai Meteorological Department which collects daily data for the environment with various sensors. The results of data fusion process will be shown value of daily evaporation that provided to comparing between the evaporative value of pan evaporation and calculated by hydrology formula. © 2008 SICE.
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A studying of automatic control system on poultry house
(2004-09-27)
Roengruen, Prapas
;
Roengruen, Songsri
;
Suesut, Taweepol
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Kongrata, Viriya
;
Kulphanich, Suphan
Nowadays, high technologies have been widely applied to agricultural industrial such as automation systems in livestock house. Such these industrial, which get income to agriculturist, product a food to export Particular, in animal industrial, important factors, which affect to grow of animal are food and many environment such as temperature, moisture and lighting, that is, if these environment is appropriately set for each short age, full grow of animal is then spent shoroy and capital to product is reduced. Characteristics of animal ancestry, food and house have been researched as a packet formulation to co-operate among sensor equipment, controlling equipment, database system, formula management system for production, and communication system. These systems have been designed to accurately and consistently operate. This is one of the researching examples at which information technology is applied to agricultural industrial.
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Demand forecasting approach inventory control for warehouse automation
(2004-12-01)
Suesut, Taweepol
;
Gulphanich, Suphan
;
Nilas, Phongchai
;
Roengruen, Prapas
;
Tirasesth, Kitti
This paper presents a technique to control the inventory level on the warehouse automation by using continuous reviewing and forecasting system. The product demand that stored in the warehouse depend on orders from customers. For each product, the demand follows a Poisson process and the delivery lead-time is known. The demand forecast can predict the trend of order and redefine the reorder point (RP) of inventory that linked to automatic warehouse control system. The automatic warehouse plays an important role in the computer integration manufacturing system (CIMS) The Junctions of CIMS include production planning, material requirement planning, work order generation, process control, quality control, shipping planning, warehouse and inventory management and material cost accounting. [1] This paper focuses on implementing an automatic warehouse control and inventory management demand forecasting system. © 2004IEEE.
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Water management simulation for electric current generation by Max-Min Ant system
(2009-12-01)
Roengruen, P.
;
Ploysuk, B.
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Suesut, T.
;
Gulphanich, S.
This paper is intended to purpose the development strategy in order to manage power generation in hydro power plant. The collecting data was used to investigate some factors that impact to power generation in hydro power plant and to integrate with Max-Min Ant system (MMAS) analysis which grouped in artificial intelligence. This method has been applied by the simulating ant food solution to properly compute the power generation which depends on time variant. Moreover, this method is computed based on the lowest producing cost. Finally, the analytical data has been simulated and tested on computer before launching to control the hydropower plant operation. © 2009 SICE.
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Smith predictor design by CDM for temperature control system
(2007-12-01)
Thuengsripan, Santi
;
Suksri, Tianchai
;
Numsomran, Arjin
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Kongratana, Viriya
;
Roengruen, Prapas
Smith Predictor control is theoretically a good solution to the problem of controlling the time delay systems. However, it seldom gets use because it is almost impossible to find out a precise mathematical model of the practical system and very sensitive to uncertain system with variable time-delay. In this paper is concerned, with a design method, of smith predictor for temperature control system by Coefficient Diagram Method (CDM). The simulation results show that the control system with smith predictor design by CDM is stable and robust whilst giving the desired time domain system performance. © ICROS.
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Improved speed rate in current mode algorithmic ADC
(2005-12-01)
Tipsuwarnpron, V.
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Roengruen, P.
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Chuchotsakunleot, W.
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Maitreechit, S.
A low power current-mode analog to digital converter suitable for equipment are required low voltage, low power (ADC). It uses a quartzite level with current injection technique to increase the speed of current mirrors. And this method to reduce the required input signal for a given range and higher operating speeds. In this paper, the feasibility of current-mode algorithmic ADC is demonstrated and advantages of various 2 techniques for use in the converters are considered. Experimental results for 4-bits algorithmic ADC using a 0.8 μm CMOS technology are reported, including power consumption.
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Low power current-mode algorithmic ADC in half flash (BCD)
(2006-12-01)
Chuenarom, S.
;
Maitreechit, S.
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Roengruen, P.
;
Tipsuwarnpron, V.
This paper presents a principle of analog to digital converter (ADC) based on current mode half flash (BCD). This circuit can be converted to 4-bit output at each moment, and multiple output bit numbers by serial connection. It use a current injection technique to increase the speed of current mirrors, low power and algorithmic ADC application is presented. A current mode, the active current mirror and current comparators that controlled reference current by W/L ratio, has been used. Its feasibility agrees with simulation results of PSPICE program. The circuit design used CMOS 0.5μm which is capable to the slowest conversion time is less than 5.2nS , resulting in a conversion rate of more than 195 MHz , power consumed 1mW , input current 0-60 μA and single 2.5V supply. ©2006 IEEE.
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Design of PLC networks using remote I/O module based on controller area network
(2001-09-22)
Roengruen, P.
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Suesut, T.
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Tipsuwanporn, V.
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Kongratana, V.
;
Kulphanich, S.
In this paper, the design of the networks system through CAN bus is presented. To distribute the control points with a long distance and different located for the application to on-off electrical equipment by the remote I/O module. The controlling and communication between the PLC and the remote I/O modules are used by the CAN bus serial communication. In this paper, the experiment has been set up the maximum of 32 remote I/O modules. Each remote I/Os are linked to host PLC programmed for handling a interrupt request from any remote I/O independently. Therefore, the scanning time of the controller not effects. By using this technique, the controller(PLC) can be efficiently applied to the several hundred meters.
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Half flash ADC 4-bit without DAC
(2001-12-01)
Tipsuwanporn, V.
;
Chuenarom, S.
;
Junkrob, N.
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Chuchotsakunleot, W.
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Roengruen, P.
This paper presents a principle of parallel Analog To Digital Conversion (ADC) based on current mode HALF FLASH ADC. This circuit can be converted to 4-bit output at each moment, and multiple output bit numbers by serial connection. A current mode, the active current mirror and current comparators that controlled reference current by W/L ratio, has been used. Its feasibility agrees with simulation results of PSPICE program. The circuit design used CMOS 0.8 μm which is capable to convert 4 -bit in 50 nS, power consumed 0.127 mW, input current 0-100 μA and single 3V supply. From simulation testing, the conversion rate is faster than other method.
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Smith predictor design by CDM for temperature control system
(2009-11-01)
Roengruen, P.
;
Tipsuwanporn, V.
;
Puawade, P.
;
Numsomran, A.
Smith Predictor control is theoretically a good solution to the problem of controlling the time delay systems. However, it seldom gets use because it is almost impossible to find out a precise mathematical model of the practical system and very sensitive to uncertain system with variable time-delay. In this paper is concerned with a design method of smith predictor for temperature control system by Coefficient Diagram Method (CDM). The simulation results show that the control system with smith predictor design by CDM is stable and robust whilst giving the desired time domain system performance.

Roengruen, Prapas

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