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

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