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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.....................................................................................................23 .......2 Oscilloscope captures.............1 1 Theoretical background..................................................................3 2 Component description..................................................4.......................................3 Amplification received signal and comparator..................3 Microcontroller.............................................16 4 Implementation............................................13 3.............................................14 3.8 2.....................................................................................................................................................................................5 2.................................................................................................7 Temperature sensor....................TABLE CONTENT List Images.........................................................................................1 Block diagram.6 2............................21 4....4........................................................................................................................21 4..................................................................................................................21 4....................4 Flowcharts............7 2.............1 Correction speed...................................................................................................4.............................................1 Description Probe....................5 2....4 Non-inverting operational amplifier...........19 4.......................................................3 Main function...........2 Time delay windy conditions and wind speed...11 3 Analysis and Design...............................................................................................................................2 Interrupt handler functions.........................2 1..................................2 1................................................................1 Main Objective..............1 Header files, Global variable and Defines........5 Comparator.............2 evaluation board...........20 4.............................................................................................................................................19 4...................1 Printed circuit board..............6 Voltage inverter...............................3 Code development...........................................................................................................1 Murata ultrasonic sensors.................................9 2...........13 3.........................................viii Introduction.....................22 4..............................................................................................2 1......................................................................................2 PWM filter and amplifier...............10 2............................................................................3 Measured wind speed and airspeed vectors......................................

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