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......................................................................................19 4..................................................................................22 4...........................................................................16 4 Implementation........3 Measured wind speed and airspeed vectors.....................................9 2................3 Amplification received signal and comparator..................1 Main Objective......................................................................................................................1 Description Probe.................3 2 Component description..............................................................................3 Microcontroller.......3 Code development................2 PWM filter and amplifier........................................................................................................13 3...................................................................5 2......4........................................................2 1.2 1................20 4..........................................4 Flowcharts................6 2.................................................1 Block diagram.................................................................................................................viii Introduction....................................................................................................2 Time delay windy conditions and wind speed.......2 evaluation board..........13 3..................................................................2 1...............................................................................................23 ....................................................................................................................5 Comparator...8 2...........3 Main function..............1 Printed circuit board....................4 Non-inverting operational amplifier..................................................................................................................................................................4............................................................................................................19 4........................11 3 Analysis and Design......21 4...................................................................................................1 Correction speed....TABLE CONTENT List Images.....................5 2...................................................14 3..................4............................................................1 Header files, Global variable and Defines..........................................6 Voltage inverter.....................................1 Murata ultrasonic sensors................................7 2...2 Oscilloscope captures......................1 1 Theoretical background..........................7 Temperature sensor................................................................................................................................................21 4..2 Interrupt handler functions.......................

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