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

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