การศึกษาปัญหาการใช้คอมพิวเตอร์ควบคุมเครื่องจักรในกระบวนการผลิตของอุตสาหกรรมเหล็กขนาดใหญ่ ในเขตภาคกลางและภาคตะวันออก (กรณีศึกษาการใช้คอมพิวเตอร์ควบคุม Proportional Valves และ Servo Valves ใระบบไฮดรอลิกส์)

Name: ณัฐพล ไตรรัตนศิลป์

Organization : มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

keyword: Levels of Problem

; Production Process

; Computer Problems for Proportional and Servo Valves Controlling in Hydraulic System

Abstract: The objectives of this research were to study computer problems for proportional and servo valvescontrolling in hydraulic system in production process of large steel industry in the Central andEastern part and to compare with those in different production processes. The research emphasizedon staff, policy and administrators, processing of the machines, proportional and servo valves, PLCsystem in production process and machine manufacturers. The populations being studied were 105persons selected from people who were responsible for machine computerization in productionprocess. A questionnaire was used as a tool in the study. Data were analyzed by Frequency,Percentage, Means and Standard Deviation. The findings were as follows: For the staff, it wasgreater than 40 percent of the population which had high to highest levels of problems, according toinadequate staff for task (Mean = 3.18) and lack of training in the PLC and Hydraulic system (Mean= 3.11). For the policy and the administrators, it was greater than 30 percent of the population whichhad high to highest levels of problems, according to cost reduction by doing not hire staff who hadgreat knowledge and experience also specialized in the PLC system (Mean = 2.78) and there had notraining for new staff in production process before starting a job (Mean = 2.76). For the processingof the machines, it was greater than 25 percent of the population which had high to highest levels ofproblems, according to incorrect control effected by environment in factories such as hightemperature, dirtiness, vibration, and electro-magnetic field, etc. (Mean = 2.84) in addition tomalfunctions of sensors which had been used for a long time (Mean = 2.53). For the proportionaland servo valves, it was greater than 50 percent of the population which had high to highest levelsof problems, since they were not endurable in conditions of the factory such as high temperature andcontaminated in hydraulic oil, etc. (Mean = 3.19). For the PLC system in the production process, itwas greater than 50 percent of the population which had high to highest levels of problems, sincecables were damaged due to animals, dirtiness, high temperature and being bumped by other things(Mean = 3.46). For the machine manufacturers, it was greater than 25 percent of the populationwhich had high to highest levels of problems, since staff were not trained from manufacturers forutilization and parameter adjustment of machines (Mean = 3.07).By comparison with the levels of problems, the findings showed that the different productionprocesses had different levels of problems for each aspect, except for the PLC system in theproduction process which had no different levels of problems because it showed only a minor level.

มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

Address: กรุงเทพมหานคร (Bangkok)

Email: info.lib@mail.kmutt.ac.th

Name: ผศ. นงนุช ภัทราคร

Role: อาจารย์ที่ปรึกษา

Created: 2546

Issued: 2005-11-09

Modified: 2006-05-09

วิทยานิพนธ์/Thesis

ISBN: 9741833873

CallNumber: CIT447

tha

DegreeName: ครุศาสตร์อุตสาหกรรมมหาบัณฑิต

Level: ปริญญาโท

Descipline: คอมพิวเตอร์และเทคโนโลยีสารสนเทศ

Grantor: มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

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