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

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