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

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