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

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