Sistem za digitalizacijo in spremljanje delovanja starejših strojev z namestitvijo dodatnih senzorjev

PETERCA, LAN (author), Podobnik, Janez (mentor)

V sodobnem industrijskem svetu se še vedno srečujemo s starejšimi industrijskimi stroji, ki svoje delo opravljajo dlje od njihove pričakovane življenjske dobe. Ti stroji še vedno opravljajo delo, za katerega so bili prvotno izdelani, se pa zaradi njihove starosti in slabše funkcionalnosti ne morejo primerjati z novejšimi, digitaliziranimi stroji. Novejši stroji podjetjem prihranijo čas in denar, so pa zaradi tega dražji in nekaterim podjetjem nedostopni. V diplomskem delu sta predstavljena ideja in koncept za reševanje omenjenega problema, in sicer realizacija sistema za digitalizacijo in spremljanje delovanja starejših strojev z namestitvijo dodatnih senzorjev. Sistem za digitalizacijo in spremljanje delovanja starejših strojev je izdelan na osnovi mikroračunalnika Raspberry pi 4, ki uporablja vhodno-izhodne priključke, na katerih so priključeni analogno-digitalni pretvornik ADS1115, 7 palčni zaslon za prikaz uporabniškega vmesnika in temperaturni senzor za okolico DHT22. Na analogno-digitalni pretvornik so priklopljeni tokovni transformator Shelly 120A, pospeškometer ADXL345 in temperaturni senzor za orodje MLX90164. V delu so opisani vsi uporabljeni elementi, prav tako je opisana celotna programska koda, ki je namenjena računskem delu, uporabniškem vmesniku ter povezavi OPC UA med Raspberry Pi 4 mikroračunalnikom in podatkovno bazo. V nadaljevanju je bil izveden test sistema na več različnih strojih, s čimer je bila demonstrirana praktična uporaba ter univerzalnost in zanesljivost sistema. Med razvojem se je pojavilo nekaj težav, ki so bile sproti odpravljene, prav tako se je pojavilo nekaj idej za nadaljnje delo, ki se lahko v sistem implementirajo v prihodnosti. Z diplomskim delom želim podjetjem z manjšim proračunom predstaviti cenejšo rešitev za vstop v digitaliziran industrijski svet. Prav tako je sistem namenjen tudi fizičnim osebam, ki želijo svoj stroj ali napravo digitalizirati. Cilj diplomskega dela je bil razviti sistem, ki bo nameščen na starejše stroje. Sistem bo s pomočjo dodatnih senzorjev bral vrednosti določenega stroja in jih prikazoval na uporabniškem vmesniku, prav tako pa bo vrednosti shranjeval v bazo podatkov. Vrednosti, shranjene v bazi podatkov, se bodo uporabljale za analiziranje delovanja stroja, na katerem je sistem nameščen.

• Language: Slovenian
• Keywords: Digitalizacija, Raspberry Pi, OPC UA, uporabniški vmesnik, podatkovna baza, senzorji
• Work type: Bachelor thesis/paper
• Organization: FE - Faculty of Electrical Engineering
• Year: 2022
• PID: 20.500.12556/RUL-137614
• COBISS.SI-ID: 112732163
• Publication date in RUL: 23.06.2022

Secondary language

• Language: English
• Title: A system for digitising and monitoring of older machines with additional sensors

Abstract

In today's industrial world, we still encounter old machines that have been doing their job from the very beginning when they were created. These machines still do the job for which they were originally made, but due to their age and lack of functionality, they cannot compete against newer, digitized machines. Newer machines save companies time and money, but they are more expensive and are inaccesible to some companies. This diploma thesis presents the concept for solving the problem mentioned above, namely, the realization of a system for digitalization and monitoring of old machines using different sensors. The system for digitalizing and monitoring of old machines is based on the Raspberry Pi 4 micro-computer, which uses input-output ports to which the analog-to-digital converter ADS1115 is connected to. There is also a 7-inch touchscreen display used for the user interface and a DHT22 ambient temperature sensor. A Shelly 120A current transformer, MLX90164 tool temperature sensor and ADXL345 accelometer are connected to the analog-to-digital ADS1115 converter. The part describes all the elements used, as well as the entire program code, which is intended for mathematical work, user interface and OPC UA connection between the Raspberry Pi 4 micro-computer and the database. Subseqently, a test of the system was performed on several different machines, demonstrating the pratical application and reliability of the system. During the development, there were some problems that were solved on the spot, as well as some ideas for further work that can be implemented in the future. We want to present a cheaper solution to companies with smaller budget to enter the digitalized industrial world. The system is also intended for individuals who want to digitize their machines. The aim of the diploma was to develop the concept of a system that will be installed on old machines. The system will use different sensors to read the values and display them on the user interface. Values from sensors will also be save on the database. The values stored in the database will be used to analyse the machine performance on which the system is installed

• Keywords: Digitalization, Raspberry Pi, OPC UA, user interface, database, sensors