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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.................3 Amplification received signal and comparator........................3 Measured wind speed and airspeed vectors......................1 Main Objective.......................................................................................................................................................................................3 2 Component description.............................................9 2...................................11 3 Analysis and Design.......................................................7 Temperature sensor.........19 4......................................2 Time delay windy conditions and wind speed.4 Non-inverting operational amplifier.................................1 Header files, Global variable and Defines............................................................................................21 4.............................................4 Flowcharts...................................4...........................16 4 Implementation.................20 4..................................2 evaluation board.....................................1 Block diagram..........................................................................19 4..............................10 2....................................................2 PWM filter and amplifier................................................................5 2...........................................13 3.....8 2.......21 4..........................................21 4.13 3......2 Interrupt handler functions..............................................................3 Microcontroller............................................4...................................23 ......4..........................7 2...............................................................................................................................................................................................6 2......viii Introduction........3 Main function...................................................1 Description Probe............5 Comparator.....1 Correction speed.............................................................2 1...................22 4.....................................................................................................3 Code development.........................................2 1.....6 Voltage inverter.....................2 Oscilloscope captures.............................................................................5 2.....................TABLE CONTENT List Images.................................................................................................................................................1 1 Theoretical background.......1 Murata ultrasonic sensors.......................14 3................................................................................................................................2 1...............................................................................................................................1 Printed circuit board........................................................................................................

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