| dc.description.abstract | This paper focuses on the study of the navigational multimedia system and addresses the power consumption and temperature under various functions, the purpose is how to improve the navigational multimedia system device cooling, to avoid overheating protection or shutdown. Test method is based on constant voltage, where each function is tested for voltage used and in turn to compute the power consumption. The next step is to use temperature recorder to measure the temperature profile of each function. With this data we are able to verify that the digitized disc mode combining with GPS mode makes the power consumption and temperature highest. Therefore we use it as the main target model for this study.
In this thesis, the thermal conductivity and cooling surface are important parameters, which indicate how much the amount of heat be dissipated from the multimedia system, so that the system can functioned well at standard temperature or even below a specified working temperature. With the increase in thermal conductivity and cooling surface we are able to effectively lower the temperature within the system, after experimental data and formula calculation, an optimization result can be obtained, using official type-3 HSK, TEMPO T16 and Pioneer PMP-P-300C-D heat conduction sheet can effectively reduce the temperature in the system, and achieve the purpose of making the system work normally.
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