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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.........2 Time delay windy conditions and wind speed...................................................................................4......................................................21 4............................................................1 Header files, Global variable and Defines..........14 3.5 2....................10 2...................................................................................................................................3 Amplification received signal and comparator.........................................1 1 Theoretical background.................................................................................6 Voltage inverter.............................1 Main Objective............................................................19 4...........................4..............................................viii Introduction..................................11 3 Analysis and Design.......................................................................................................................................................................................................................3 Microcontroller............16 4 Implementation.............................2 1........2 1..............1 Printed circuit board.......................2 Oscilloscope captures........................................................................................1 Block diagram..........................................4 Flowcharts.......................................20 4.......................................13 3......................5 Comparator..................4.........................................................................................2 1.8 2.......1 Description Probe................7 Temperature sensor......................................2 evaluation board..............................................................................................................................................................6 2.................22 4..23 ...................................................................................................................................9 2.....21 4........................4 Non-inverting operational amplifier......................................................21 4...................................................................2 PWM filter and amplifier...........................1 Murata ultrasonic sensors............................................................................................................7 2..............................3 Measured wind speed and airspeed vectors....................................................1 Correction speed..............................................2 Interrupt handler functions...................................3 Main function..................................13 3....3 2 Component description.............................TABLE CONTENT List Images..........................................................................5 2..............3 Code development.............................................................19 4.........................................

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