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 Description Probe.............................................2 Oscilloscope captures..............................3 Amplification received signal and comparator.............21 4.................6 2....................................................................................1 Block diagram....................................................................................................3 Code development......................................................................2 Time delay windy conditions and wind speed..........................................1 Printed circuit board..............1 Murata ultrasonic sensors.....................................................................................................................................................................16 4 Implementation.....................................19 4..........................................................11 3 Analysis and Design...................................................................2 evaluation board.....................7 2..............3 Measured wind speed and airspeed vectors..........................5 2...........................................................4..........................................2 1...4..........................................................................................1 Main Objective...............................2 PWM filter and amplifier......................................................................................................................................................................................................................................TABLE CONTENT List Images................5 2.........................2 Interrupt handler functions.......14 3...............................................................................................................................................................................................2 1....................................13 3.3 Microcontroller..................4.......................................9 2.............8 2.....................3 Main function...........1 1 Theoretical background.................................19 4...6 Voltage inverter...........2 1.4 Flowcharts......................................................................................22 4...............................................................................................................7 Temperature sensor..................................................................20 4..................viii Introduction.................................21 4.....................................................3 2 Component description.........4 Non-inverting operational amplifier......................21 4...5 Comparator...............................................13 3..................................1 Correction speed....................................................................................................................................23 .........................................1 Header files, Global variable and Defines..10 2........................................

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