Ultrazvukový anemometr

| Kategorie: Diplomové, bakalářské práce  | Tento dokument chci!

Práce popisuje principy a problémy při realizaci ultrazvukového anemometru. Je popsán princip výpočtu rychlosti větru a následné korekce výpočtu. Pro realizaci jsou využity ultrazvukové sensory a microcontrolér ARM Cortex-M3. Práce se zabývá generováním PWM signálu, jeho analogovou filtrací, zesílením a odvysíláním. Na přijímací straně jeto nízkonapěťový zesilovač a komparátor. Vyvíjený kód je popsán pomocí vývojového diagramu.

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..............................................13 3....................................................................................................10 2..................................................................................................3 Main function..3 Code development....................2 Time delay windy conditions and wind speed...................2 PWM filter and amplifier.............................................................3 Microcontroller...................................................6 Voltage inverter...................................................................................................................1 Description Probe.................................................22 4.......................................................................5 2................2 Oscilloscope captures.....................21 4..........................3 Amplification received signal and comparator...............................................................................................................................................................20 4........................7 Temperature sensor...........................................................................................2 1......................................................................19 4......................7 2................................................................14 3......................................1 Printed circuit board.................................................................16 4 Implementation....1 Murata ultrasonic sensors..............................4 Non-inverting operational amplifier........1 1 Theoretical background.....................................2 Interrupt handler functions................3 Measured wind speed and airspeed vectors...................2 1..................................19 4........1 Header files, Global variable and Defines..................................................................................................................4...............................................................................................8 2...2 1.......11 3 Analysis and Design.........................................................................................................1 Block diagram..............21 4........1 Correction speed.....................................................................................................3 2 Component description...13 3..............................................................5 Comparator..........................5 2..................................................................................21 4......................................viii Introduction.......4.......................................9 2.........................................4 Flowcharts....................23 ..............................................2 evaluation board...................4........................TABLE CONTENT List Images.....................................................................6 2.....................1 Main Objective.......................................................................

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