จำนวน Repository ( 3611 )

The Application of Microcontroller for the Q Measurementation of Band Pass Filter
The Application of Microcontroller for the Q Measurementation of Band Pass Filter

This project deals with the application of microcontroller used for measuring the Q-factor of band pass filter. The procedure starts from the design creation and improvement of Q-factor and bandwidth of the filter. Solving the circuit filter frequency requirement the band must pass the filter. An instrument is necessary in the design of filtered frequency that shows the cut off at the rise edge and down edge searching the bandwidth and Q-factor of the filter. Finally the monitor will show all the values of every detail.

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Energy Conservation by the Application of Engineering Principles in a Large Industrial Plant
Energy Conservation by the Application of Engineering Principles in a Large Industrial Plant

This article presents the energy conservation of the wood furniture factory in Samutprakarn province by using engineering management technique. The electrical energy of 7408000 kWh per year or 25988055 Bath per year is mainly used in the processes including a heating energy system that is derived from wood scrap. After detailed audit it was found that 8 measures have a potential to improve energy efficiency. 7 measures for electrical energy can reduce the energy of 479837.60 kWh per year and the rest decreases heating energy of 120297.15 MJ/Year or saving the scrap of 9.4 tons per year. In order to assess economic possibility all measure also were considered. The result showed that it was worth to investment. In addition specific energy consumption (SEC) can be improved from 0.57 kWh/ft3 to 0.54 kWh/ft3 or diminishing of 5.26 %

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Substation Remote Terminal Unit (SRTU)
Substation Remote Terminal Unit (SRTU)

This paper presents a remote control device adapted to control the power station equipment. This system is a part of the control and collecting data system. It is used to control the operation of the circuit breaker in the power station and to reduce the transfer of load quickly and easily. It is tested with an open - closed circuit of the power system control centers 10 of which have no error (100 percent) As for the amount of electricity It is tested by the meter reading of this controller compared to the actual payment system to a percentage error. It was found that the reading of zero percent power control error was less than the percentage error of reading from the meter front control panel. The system can record the amount of power to bring information to plan the expansion of the distribution system in the future. However some power station equipments to be installed such as unlocked - chopping blade switches whose functions cannot be controlled.

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Art Educational Media Design for Emotional Development of Mentally-Retarded Children
Art Educational Media Design for Emotional Development of Mentally-Retarded Children

The purpose of the research was to study the art educational media design for the emotional development of mentally-retarded children. The principle of visual arts was used as a design concept. High relief pottery and painting were used as the experimental tools.The development emphasized on shape size and color learning. The results showed that the average mean of the children’s interest was at 4.02. The educational media helped improve the children’s concentration and the emotional development. Color was the easiest media to help the children’s learning. Animal shape was not too much complicated to learn. These were appropriate for mentally-disabled children

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เครื่องบดถั่วเหลืองเป็นผงแป้งแบบจานร่วมกับลูกกลิ้ง
เครื่องบดถั่วเหลืองเป็นผงแป้งแบบจานร่วมกับลูกกลิ้ง

Soybeans are a crop that can be utilized especially in terms of food rich in protein and fat as the human and animal needs. For using the soybeans must be processed to obtain the desired physical characteristics. The process is mostly a grinding and extraction. However these two processes are completely different applications. This research aims to study and create the soybeans grinder machine become to flour the quantity of grinding the variable that affect to the amount of grinding and economic analysis for guiding to investment. The researchers have designed the grinder unit by the coarse grinding and mill grinding unit. For the coarse grinding unit is similar to a disc and in case of grinding mill will be used the roller set. Base on the power train of bolt grinding unit the electric motor with 2 HP. at 1450 RPM are used for the experiment. For the grinding mil process the rough material is feed into grinding mil chamber for reduce the size of material become to the flour. The results of the research found that the suitable speed of the coarse grinding and mill grinding unit was 480 and 725 RPM respectively. In case of these relationships the average quantity of grinding for the coarse grinding and mill grinding unit was 271.8 and 150 kglhr respectively. Furthermore the results of experiment discover the materials that are not accounted of the coarse grinding for 13.9 percent. For the economic analysis for guiding to investment found that the breakeven point and pay-back period was 110378 kg and 0.0067 year respectively.

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