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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...............................1 Printed circuit board........................................................................5 2..................................16 4 Implementation...................................................5 Comparator.1 Main Objective.....................................................................................TABLE CONTENT List Images....1 1 Theoretical background..............................................................11 3 Analysis and Design........................1 Description Probe....21 4....................................2 1.................................................21 4.............14 3.....................................3 Microcontroller....................1 Murata ultrasonic sensors.......................................................................................................................................7 Temperature sensor.....23 .............................3 Amplification received signal and comparator......................22 4........................................6 Voltage inverter.....................................................2 Time delay windy conditions and wind speed..................................................................3 Code development.................................20 4.........13 3.3 Main function...............................................................................................4 Flowcharts......................................................................2 1....3 Measured wind speed and airspeed vectors......................19 4....................................................................2 Interrupt handler functions.............................................................................1 Header files, Global variable and Defines......2 PWM filter and amplifier..........................................................................................21 4.........................................................................4...........................2 evaluation board............................................1 Correction speed......................................................................1 Block diagram..............13 3...................................3 2 Component description...4..........................7 2.............viii Introduction...........................................................................................19 4............................9 2..................................................................................................................10 2...........................................................5 2.......................................2 Oscilloscope captures..............................................................6 2..........................................................................................................................................................8 2.....................................................2 1................4 Non-inverting operational amplifier..........................................................................4........................................................

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