Vmesnik za analizo in diagnozo analognih inkrementalnih dajalnikov pomika in zasuka

DERSTVENŠEK, TIMOTEJ (author), Žemva, Andrej (mentor)

V pričujočem delu je opisan postopek razvijanja naprave, s katero je mogoče opraviti analizo analognih inkrementalnih dajalnikov položaja in zasuka. Dajalnik imenujemo senzor, ki informacijo o pomiku pretvori v analogne ali digitalne signale. Eno najuspešnejših podjetij v Sloveniji, ki se ukvarja z magnetnimi senzorji pomika in zasuka, je RLS merilna tehnika, s podjetjem sem sodeloval ob izdelovanju te naloge. Napačno delovanje dajalnikov je v mnogo primerih lahko tudi smrtno nevarno, zato je redna verifikacija delovanja in hitro odkrivanje napak dajalnikov izredno pomembno. Predstavljen je potek načrtovanja vmesnika, vse od določitve specifikacij do simulacij, zasnove delovanja, same izdelave tiskanega vezja in opisa programskega dela. Za upravljanje nastavitev vmesnika in dajalnika ter za izračun, prikaz in interpretacijo zajetih parametrov, je bil ustvarjen tudi grafični uporabniški vmesnik. Kvaliteta končnega izdelka je bila ocenjena s številnimi meritvami, pri prvi so bile preverjene napetosti na ključnih mestih, sledila je meritev točnosti vmesnika in iz nje izpeljana kalibracija. Za zanesljivost naprave je pomembna meritev zagonskega toka, z osciloskopom pa je bila izmerjena tudi kakovost in oblika določenih pomembnih signalov. Izvedena je bila tudi primerjava s konkurenčnim vmesnikom PWM 20 proizvajalca Heidenhain, ki sicer omogoča analizo več različnih vrst dajalnikov, vendar je tudi precej dražji. Izdelan vmesnik je primerljiv s konkurenčnim in je kljub nizki ceni dovolj točen za zanesljivo in verodostojno analizo analognih inkrementalnih dajalnikov. Po temeljitem testnem in preizkusnem obdobju lahko ocenim, da je vmesnik v skladu z zastavljenimi cilji in se že uporablja v razvojnem oddelku podjetja.

• Language: Slovenian
• Keywords: vmesnik, analiza, dajalnik, pomik, diagnoza
• Work type: Master's thesis/paper
• Organization: FE - Faculty of Electrical Engineering
• Year: 2019
• PID: 20.500.12556/RUL-109205
• Publication date in RUL: 27.08.2019

Secondary language

• Language: English
• Title: Interface for analysis and diagnosis of analog incremental position and angle encoders

Abstract

This work includes process description about developing a device, with which it is possible to analyse analog incremental position and angle encoders. An encoder is often called a sensor, which transforms information about movement into analog or digital signals. One of the most successful companies in Slovenia, which develops magnetic encoders is RLS merilna tehnika. I cooperated with them while writing this paper. Encoder failure can often be deadly, that is why regular verification of operation and quick failure discovery is of high importance. The devices designing process, everything from specification, to simulations, operating concept, printed circuit board design and firmware description, is presented. For an easier way of setting interface and encoder settings and for calculating, displaying and interpretation of signal parameters, a graphical user interface was also developed. Final product quality was evaluated with many different measurements. First critical voltages were verified, followed by accuracy measurement and calibration derived from it. For reliability, inrush current measurement is important and finally oscilloscope was used for signal integrity test. Furthermore, a comparison with a competing companies interface PWM20 from Heidenhain, which enables analysis of many different encoder types but comes with a heavier price tag, was made. Completed interface for a given encoder type is comparable with PWM20. Despite its lower price, it does not compromise on accuracy and is appropriate for reliable and credible analysis of analog incremental encoders. After rigorous test and trial periods, I can assess that developed interface is within goals and is already used in R&D section of the company.

• Keywords: interface, analysis, encoder, movement, diagnosis