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.

Vydal: FEKT VUT Brno Autor: Michael Dvořácek

Strana 27 z 49

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Made board with it's mother board and from bottom layer images below. each board larger side are two lines brought out pins with 2,54 mm. Mirror inverted layout was printed tracing paper put board and illuminated. Then illuminated film was developed sodium hydroxide solution. Program show unconnected pads and pins and include design rule check. All have 0,4 with same space between them. Final board was cleaned alcohol and drilled. This multi platform OS software easy use, ideal for manual routing. But from length can’t occupy more than don’t cover display. For this type component optimal makes routes wider. Between them free space with width mm. PCB design was created with Eagle software CadSoft. Dimensions our module was given dimensions board.IMPLEMENTATION 4. We tin-plated the board first and then planted used components. All integrated circuits are DIP case.1 Printed circuit board We realized another various analog circuits. [4] All used electronics components are axial, placed top and soldered bottom of PCB. PCB was created positive photo-way process. can set various design rules minimum pads width, minimum route width minimum clear space between routes and this tool then correct final design according ours demands. It’s cheap way how create PCB in laboratory with commonly available chemical substances and positive photo-resist fiberglass board. Module board can be connected above board via connectors.1: Made module board photos 19 . first circuits were completed solder- less breadboard and then evaluation board module was created. After that etched board hydrochloric acid with hydrogen peroxide. Its width 62 mm and length 116 mm. Illustration 4