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PLC Controlled System for Local Humidity Management in Electronic Enclosures
Jönköping University, School of Engineering, JTH, Computer and Electrical Engineering. (Embedded System)
2010 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This master thesis is about investigation a power efficient anti-moisture device thatcan be implemented in electronic enclosures in severe climatic environments.First, some of the existing knowledge and previous works were introduced. Then arelevant theoretical background including three main approaches in humiditymanagement are described, comparison between the enclosure heaters and localheaters, some psychrometics concepts that have been used in the project, heattransfer fundamentals, environmental test basics, some humidity and temperaturesensing techniques, computational fluid dynamics, programmable logic controlfundamentals, comparison PLCs with microcontrollers was provided.A series experiments have been performed in order to find the power efficient andmost effective anti-moisture method. Based on the analysis of the experiment data,the local heater system has been designed. CFD assisted parametric study of thelocal heater has been performed in order to find the best feasible design includingthe size and location. The local heater has been built based on the results ofparametric study. Different materials have been tested in laboratory in order tofind the proper material for final prototype of heater. The implemented localheater has been integrated with programmable logic control device. The controlalgorithm has been developed for activation/deactivation of local heater. The logiccontrolled PCB local heater has been experimentally evaluated.In the end the results achieved from environmental test have been presented andanalyzed. Some conclusions on the results and also future work have been discussed.

Place, publisher, year, edition, pages
2010. , p. 120
Keywords [en]
Humidity management, Harsh environment, Electronics Enclosure, Environmental test, Computational Fluid Dynamics, Enclosure Heater, Programmable Logic Control, Computer Modelling
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:hj:diva-13148OAI: oai:DiVA.org:hj-13148DiVA, id: diva2:351868
Presentation
2010-06-11, E1405, Engineering Department-Jönköping University, 14:10 (English)
Uppsok
Technology
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Available from: 2010-09-16 Created: 2010-09-16 Last updated: 2011-01-20Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
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  • vancouver
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Output format
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