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

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