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

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

---

---