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

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