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Influence of temperature on lead acid batteries lifetime
Kopečný, Martin ; Bača, Petr (referee) ; Neoral, Jiří (advisor)
Lead –acid batteries are the most common type of secondary cells used in automotive industry. This diploma thesis deals with the influence of temperature on their lifetime. In the preamble of this work is shortly described their history, division, construction and processes during battery operation. There are noted unfavorable phenomena which have an impact on increasing the temperature inside the battery. The first experimental part is devoted to evaluation the effects of addition on the temperature rise during charging. The second part is focused on conditions simulation in hot areas at the temperature above 30 °C and effects of this temperature on the function of lead – acid batteries.
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Accelerometric Distributed System
Kopečný, Martin ; Číp, Ondřej (referee) ; Václavík, Vlastimil (advisor)
This thesis deals with principles of measuring of acceleration with commercially available accelerometers and theoretical analyses of measuring of angular speed of rotational motion. Then the proposition of application’s connection controlled by microprocessor and software solution with implementation of serial communication interface is described. The function of the apparatus is examined with experimental measuring and elaborated protocol.
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Precise frequency generator
Kopečný, Martin ; Horák, Martin (referee) ; Kolka, Zdeněk (advisor)
This bachelor thesis is aimed at design and realization a Precise frequency generator. Generator making use radio service DCF77 as a source of referencial signal for synchnonization. Synchronization with DCF signal warrants to generator high long time precision of output frequency. Generator is used to measurement. This device generate synchronous clock frequency in two places which are independent and remote each other about 1km.
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Precise frequency generator
Kopečný, Martin ; Horák, Martin (referee) ; Kolka, Zdeněk (advisor)
This bachelor thesis is aimed at design and realization a Precise frequency generator. Generator making use radio service DCF77 as a source of referencial signal for synchnonization. Synchronization with DCF signal warrants to generator high long time precision of output frequency. Generator is used to measurement. This device generate synchronous clock frequency in two places which are independent and remote each other about 1km.
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Influence of temperature on lead acid batteries lifetime
Kopečný, Martin ; Bača, Petr (referee) ; Neoral, Jiří (advisor)
Lead –acid batteries are the most common type of secondary cells used in automotive industry. This diploma thesis deals with the influence of temperature on their lifetime. In the preamble of this work is shortly described their history, division, construction and processes during battery operation. There are noted unfavorable phenomena which have an impact on increasing the temperature inside the battery. The first experimental part is devoted to evaluation the effects of addition on the temperature rise during charging. The second part is focused on conditions simulation in hot areas at the temperature above 30 °C and effects of this temperature on the function of lead – acid batteries.
|
|
|
Accelerometric Distributed System
Kopečný, Martin ; Číp, Ondřej (referee) ; Václavík, Vlastimil (advisor)
This thesis deals with principles of measuring of acceleration with commercially available accelerometers and theoretical analyses of measuring of angular speed of rotational motion. Then the proposition of application’s connection controlled by microprocessor and software solution with implementation of serial communication interface is described. The function of the apparatus is examined with experimental measuring and elaborated protocol.
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