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

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