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

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