7 research outputs found
Construction of device for measurement of operating and drive conditions of an electrobike
Tato diplomová práce se zabĂ˝vá rešeršĂ, návrhem a realizacĂ zaĹ™ĂzenĂ pro měřenĂ a ukládánĂ provoznĂch a jĂzdnĂch dat elektrokola. Rešerše se zabĂ˝vá moĹľnostmi měřenĂ fyzikálnĂch a pĹ™edevšĂm elektrickĂ˝ch veliÄŤin. Dále je popsán návrh a volba hardwarovĂ˝ch komponent vÄŤetnÄ› Ĺ™ĂdicĂho procesoru a senzorĹŻ. VytvoĹ™enĂ© elektrickĂ© zaĹ™ĂzenĂ sbĂrá data ze senzorĹŻ elektrickĂ©ho proudu (ACS758), napÄ›tĂ (napěťovĂ˝ dÄ›liÄŤ), teploty (DS18B20), otáček (TLE4906L) a polohy GPS (A2200-A) a ukládá je na SD kartu. V práci jsou popsány i problĂ©my, kterĂ© se v prĹŻbÄ›hu realizace objevovaly a bylo nutnĂ© jejich Ĺ™ešenĂ pro dalšà postup.This diploma thesis deals with research, layout and realisation of datalogger for measuring and storage of operational and driving data of the e-bike. The research focuses on measurement options of physical and electrical quantities. The layout of the device and selection of hardware components, including the control processor and sensors, are also described. The electrical device created collects data of electrical current (ACS758), voltage (voltage divider), temperature (DS18B20), speed (TLE4906L) and GPS position (A2200-A) from the sensors and stores it on an SD card.The diploma thesis also deals with problems, which had shown during the realization and which had to be solved for the next steps
Control and monitoring of physical values in a highland florarium through the internet
Tato bakalářská práce se zabĂ˝vá rešeršĂ, návrhem a realizacĂ Ĺ™ĂdicĂho systĂ©mu vysokohorskĂ©ho florária, realizovanĂ©ho pomocĂ Raspberry Pi. Rešerše se zabĂ˝vá popisem a moĹľnostmi měřenĂ fyzikálnĂch veliÄŤin. Dále je popsán návrh a volba hardwarovĂ©ho vybavenĂ florária a Ĺ™ĂdicĂho systĂ©mu.VytvoĹ™enĂ© elektrickĂ© zaĹ™ĂzenĂ sbĂrá fyzikálnĂ data ze senzorĹŻ teploty, CO2, vlhkosti vzduchu, vlhkosti pĹŻdy a prezentuje je na webovĂ© stránce ve formÄ› grafĹŻ. Dále na tyto data reaguje pomocĂ akÄŤnĂch ÄŤlenĹŻ topnĂ˝m kabelem, ventilátory a závlahovĂ˝m systĂ©mem. Stejnou webovou aplikacĂ je umoĹľnÄ›no i ruÄŤnĂ ovládánĂ akÄŤnĂch ÄŤlenĹŻ.V práci jsou nastĂnÄ›ny i problĂ©my kterĂ© se v prĹŻbÄ›hu realizace objevovaly a byly nutnĂ© vyĹ™ešit pro dalšà postup.This bachelor thesis deals with research, layout and realisation of controlling system of a highland florarium, which was realised via Raspberry Pi. The research deals with a description and options of measurement of physical quantities. It also includes a description and choice of hardware equipment of the florarium and the controlling system. The electric device collects physical data from the temperature sensors, CO2, air humidity, and presents them on the website in graphs. The device also responds to this data via actuators such as heating cable, ventilators and watering system. The manual control of actuators is available via the same web application. This bachelor thesis also deals with problems, which have shown during the realisation and which had to be solved for the next steps
Investigation of the membrane regeneration methods by flow visualization
This paper deals with an investigation of regeneration methods on a flat sheet membrane by flow visualization of the inlet side of a filter. The regeneration significantly increases performance of the membranes, extends its lifetime and saves resources. The regeneration process prevents depositing of particles on the filter surface and forming a filtration cake as well as reopens clogged pores in the filter structure. The visualization of flow helps deeper investigation of different regeneration methods because it brings a new view on the filtration/regeneration process on a thin laser sheet whilst it is recorded by a digital camera. The result is, besides the overall view, just the local concentration of the particles, which is determined by image analysis of the recorded pictures from the camera. The amount of the deposited particles on the filter is compared to the hydrodynamic data and the effect of the tangential flow and bubbling intensity parameters is investigated in the article. The tests are carried out on a low volume laboratory filtration setup - LSD 115 with a new optic filtration channel