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PLC Controlled System for Local Humidity Management in Electronic Enclosures
Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik. (Embedded System)
2010 (Engelska)Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
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.

Ort, förlag, år, upplaga, sidor
2010. , s. 120
Nyckelord [en]
Humidity management, Harsh environment, Electronics Enclosure, Environmental test, Computational Fluid Dynamics, Enclosure Heater, Programmable Logic Control, Computer Modelling
Nationell ämneskategori
Annan elektroteknik och elektronik
Identifikatorer
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 (Engelska)
Uppsök
teknik
Handledare
Examinatorer
Tillgänglig från: 2010-09-16 Skapad: 2010-09-16 Senast uppdaterad: 2011-01-20Bibliografiskt granskad

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Alavizadeh, Zahra
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JTH, Data- och elektroteknik
Annan elektroteknik och elektronik

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