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.

Strana 6 z 49

Vámi hledaný text obsahuje tato stránku dokumentu který není autorem určen k veřejnému šíření.

Více info o tomto dokumentu zde!

Jak získat tento dokument?

Poznámky redaktora

........................................................................4 Flowcharts...............4....2 PWM filter and amplifier..............4.....................................1 Block diagram.3 Main function...............................8 2...........................................7 2................................................................2 1......................................................13 3.........................................................4.3 2 Component description.........................3 Amplification received signal and comparator...............................................................6 Voltage inverter................................................................................20 4............................................5 2...................................................................................................................................2 1.............13 3..............................................................................................................................9 2.................................................................................................................1 Printed circuit board.........TABLE CONTENT List Images.......................................1 Main Objective...2 1...................3 Code development............................................................................................22 4...........................................................................................................19 4................................21 4......................................................................................................................................................6 2...............................1 Description Probe......................11 3 Analysis and Design.............................4 Non-inverting operational amplifier............................................................................................................................10 2.......................16 4 Implementation..........1 Murata ultrasonic sensors......................................2 Oscilloscope captures.............................5 Comparator.....................3 Microcontroller...........................2 Interrupt handler functions..................................................................................2 Time delay windy conditions and wind speed..14 3...................................................................................................................21 4.1 Header files, Global variable and Defines....................3 Measured wind speed and airspeed vectors..1 1 Theoretical background....................2 evaluation board..1 Correction speed...viii Introduction................23 .....21 4...............................................5 2............19 4..........................................................................................................7 Temperature sensor.............................................................................................................................................................................

---

---