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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.................................................2 PWM filter and amplifier.....................................................................................3 Main function..........................................................3 Amplification received signal and comparator............................................3 Measured wind speed and airspeed vectors...........................................................................21 4.........................16 4 Implementation............................................1 Correction speed....................................................1 Main Objective.............................................7 Temperature sensor......................................................................................................................................3 2 Component description..........3 Code development.........1 Header files, Global variable and Defines.........5 Comparator..........................2 Interrupt handler functions..4.........9 2....................................................................................................................................................................................21 4...............................................................22 4..................................................................................4............4 Flowcharts..............................................................................7 2.......................................6 Voltage inverter...........................................1 Murata ultrasonic sensors............................23 ...................................13 3..................................................................................................................1 Description Probe...............................................1 Printed circuit board................2 Time delay windy conditions and wind speed.........................14 3........................................................................................................................4 Non-inverting operational amplifier...........................................................................................................................11 3 Analysis and Design.................................TABLE CONTENT List Images.....................................................................19 4..........10 2.....5 2................13 3.........................................................................................2 1.............................2 evaluation board.......2 1................6 2.......2 1......................................................................2 Oscilloscope captures.....................................................5 2.....................4..........................................................................................1 1 Theoretical background.....................................3 Microcontroller...............................................21 4.20 4..............................................19 4............................1 Block diagram.......viii Introduction..........................8 2...........

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