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...4................8 2............................................................6 Voltage inverter................................................................2 PWM filter and amplifier.....3 2 Component description........2 1..........3 Code development...........21 4..................................viii Introduction.............................................................................................3 Measured wind speed and airspeed vectors...................3 Amplification received signal and comparator.......23 ........................................................................................................................................9 2.....16 4 Implementation................................................................................4..............21 4..................20 4.......................................................................................................21 4........................................................................2 Interrupt handler functions....................................................................................................3 Microcontroller..................................................................4......................................................................................................................................................2 evaluation board..................................................................................................................................1 Murata ultrasonic sensors...................................................................13 3......................................................1 Block diagram.............5 2........................................................3 Main function.........14 3..................1 Header files, Global variable and Defines.............................................................................................................1 Correction speed.....................................................19 4.1 Printed circuit board..........................1 1 Theoretical background......................................................4 Flowcharts..................................................7 Temperature sensor..............................19 4................................5 2.................TABLE CONTENT List Images................11 3 Analysis and Design...........................................................................2 1.............................1 Main Objective.....................................................................................1 Description Probe............................................................22 4..............5 Comparator........................................................................4 Non-inverting operational amplifier.....2 1......6 2.........................................................................................................2 Oscilloscope captures......................................................2 Time delay windy conditions and wind speed.................................................10 2..........7 2........................

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