20.500.12556/RUL-85807 Korekcija temperature v tunelski peči Temperature correction in a tunnel baking oven Cilj diplomske naloge je bil programsko odpraviti problem preveč zapečenih izdelkov v serijski proizvodnji peke kruha. Ta problem nastane, ko se zaradi določenega razloga, kot je npr. menjava vrste izdelka, pojavi večja luknja na tekočem traku. Vnos testa v peč je v tem primeru močno zmanjšan in posledično prihaja do dviga temperature v območju in okolici luknje. Programska logika peči teče na programirljivem logičnem krmilniku. Program je večinoma izdelan v lestvičnem diagramu, določene funkcije pa so zaradi lažjega dela z zbirkami napisane v strukturiranem tekstu. Reševanje problematike smo razdelili na tri dele. Prvi del vsebuje programsko beleženje lukenj, s pomočjo presvetlitvenega senzorja montiranega na vstopu v peč in njihovo sledenje skozi peč. Drugi del zajema izdelavo dodatnega zaslona na nadzornem sistemu, ki je namenjen prikazu trenutnega stanja na traku in temperature v peči. Tretji del na podlagi informacije o velikosti in lokaciji lukenj ustrezno zniža temperaturo peke. Potrebne vrednosti temperatur so bile določene na podlagi nasvetov procesnega tehnologa v podjetju. V prihodnosti bo potekalo tudi testiranje na realnem sistemu. The main aim of the thesis was to develop a solution for the problem of overbaked products in serial bread-baking production. The problem can occur due to several different reasons. One of them is the change of baking product, when an empty space on the conveyor belt appears. As a result, dough entry in the oven is reduced. Therefore, the themperature in this area rises. The control software runs on a programmable logic controller. It is programmed mostly using ladder diagram, while some functions are written using structured text. We divided the solution into three parts. The first part is intended for tracking of holes through the oven using a through-beam sensor that is implemented at oven inlet. Second part describes creating of an extra screen in the supervisory control system, which is designed for visual presentation of the current position of holes and the temperatures in the oven. Part three, based on the size and the location of the holes, lowers the baking temperature to prevent overbaked products. Adequate values for temperature changes were determined according to the advice given by a process technologist. We are planning to test the program on an actual system as well. programirljiv logični krmilnik lestvični diagram peč nadzorni sistem programmable logic controller ladder diagram oven supervisory system true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2016-09-26 14:05:05 2016-09-26 14:05:07 2022-08-09 10:19:56 0000-00-00 00:00:00 2016 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 34141 Dolenc_Peter_-_Korekcija_temperature_v_tunelski_peci.pdf Dolenc_Peter_-_Korekcija_temperature_v_tunelski_peci.pdf 1 4766E18BCC26FD5CD69E63403769D394 3ddceae91a40f5e875a7ccd301d9b6f3bcba5accf94ec904d567d2c5b524d942 03dad874-a1b1-11eb-a523-00155dcfd717 20.500.12556/rul/42a47f94-3538-4d34-a98f-c11ab78d1813 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=88950 Fakulteta za elektrotehniko 0 0 0