The Application of IP-Camera on Water Protection Using Gore-Tex Film and The Moisture Coagulation Problem Solution Analysis
| Autor: | Sung, Houng-Shiang, 宋宏祥 |
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| Rok vydání: | 2012 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 100 This study describes the future application and development of IP camera and compares IP camera with conventional surveillance camera CCTV to explain characteristic differences between the two. In the study, IP camera was applied for analyzing the foggy phenomenon produced by breathable Gore-Tex film. The goal is to examine the appropriateness of currently available methods for preventing fogginess as well as to offer more effective strategies for resolving this phenomenon. Considering the manufacturing method of Gore-Tex breathable film and characteristics of ePTFE, a main ingredient of Gore-Tex breathable film, the breathable film of model number GAW324 was selected and applied in this study. This type of film is specifically used on microphone’s sound receiving holes to achieve the water resistant requirement. The airflow rate can be as much as 5, while the water resistant level of the film can be as high as IP67. That is why this type of film is often used on products that need to be not only water resistant but also air permeable. Yet according to the diameter of the microfiber of ePTFE and characteristics of GAW324 film, GAW324’s water vapors permeability can be greater than 100. In other words, the microfiber diameter of the film is still larger than either gas-phase or vapor-phase water molecules, and thus it cannot block environmental moisture from crossing the film. As a result, this study adopted the strategy of water vapor blocking (Test 1 and Test 2) for verification and explanation. In Test 3 and Test 4, experiments were conducted to collect temperature data at the occurrence of foggy phenomenon on IP camera when the water blocking strategy was not applied. By deriving the ideal gas equations as well as referring to the empirical equation of relative humidity from the hand book of American Society of Heating, Refrigeration, and Air-Conditioning Engineers (ASHRAE), relative humidity of the temperature of each channel point measured in Test 3 and Test 4 was computed. The authors also discussed the relationship between temperature distribution and relative humidity distribution inside the IP camera when fogginess happens. The ultimate objective is to resolve the foggy phenomenon observed on products using breathable film through analyzing the phenomenon and discussing the experimental results. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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