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

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