1 research outputs found
Autonomous Sensor Signal Acquisition System
Tato práce se zabĂ˝vá návrhem a realizacĂ autonomnĂho systĂ©mu pro záznam signálĹŻ ze senzorĹŻ pro měřenĂ na malĂ˝ch a těžce pĹ™ĂstupnĂ˝ch mĂstech. ZaĹ™ĂzenĂ podporuje pĹ™ipojenĂ osmi analogovĂ˝ch vstupĹŻ, třà digitálnĂch I2C vstupĹŻ, ÄŤtyĹ™ univerzálnĂch binárnĂch vstupĹŻ a obsahuje vestavÄ›nĂ˝ digitálnĂ akcelerometr. ZaĹ™ĂzenĂ dále poskytuje programovatelnĂ© proudovĂ© zdroje pro napájenĂ analogovĂ˝ch senzorĹŻ a obvody pro zesĂlenĂ signálĹŻ z analogovĂ˝ch vstupĹŻ. ZaĹ™ĂzenĂ podporuje dva mĂłdy. V reĹľimu autonomnĂho měřenĂ jsou po uĹľivatelem nastavenĂ˝ ÄŤas zaznamenávána data z jednotlivĂ˝ch senzorĹŻ. Naměřená data jsou ukládána na internĂ microSD kartu. V reĹľimu pĹ™enosu mohou bĂ˝t skrze webovou stránku konfigurovány parametry měřenĂ a stahovány soubory s naměřenĂ˝mi daty. MoĹľnost pĹ™ipojenĂ indukÄŤnĂ nabĂjeÄŤky zajišťuje kompletnĂ bezdrátovost celĂ©ho zaĹ™ĂzenĂ. Práce se zabĂ˝vá hardwarovĂ˝m Ĺ™ešenĂm a návrhem firmwaru do mikrokontrolĂ©ru STM32F411VE slouĹľĂcĂmu k ovládánĂ celĂ©ho zaĹ™ĂzenĂ a do mikrokontrolĂ©ru ESP8266 obsaĹľenĂ©m uvnitĹ™ Wi-Fi modulu.This thesis discusses the concept and the realisation of the autonomous sensor signal acquisition system for measurement in small and hardly accessible places. The device supports eight analog inputs, onboard digital accelerometer, three I2C digital inputs and four universal binary inputs. The device also provides programmable power sources for analog sensors and signal conditioners for amplification of the measured analog signal. The device provides two modes. In the stand-alone mode, the system with specified settings records data for given time. The measured data are stored to the microSD card. In transfer mode, the system can be configured through the web page, and the files with measured data can be downloaded. The possibility of using inductive charging ensures the complete wireless device operation. This text considers the hardware solutions and the firmware design for the STM32F411VE microcontroller used to control the device and for the ESP8266 microcontroller included in the Wi-Fi module