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

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