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

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