Preizkus instrumenta Leica Nova MS50 po standardiziranemu postopku ISO 17123-5 : diplomska naloga

Vračar, Iris (author), Marjetič, Aleš (mentor)

Razvoj merskega instrumentarija v geodeziji je privedel do tega, da je terenski zajem meritev hiter. Večinoma gre za elektronske naprave, ki poleg merskih senzorjev vključujejo tudi procesorske in pomnilniške enote. Torej pri geodetskih instrumentih razpolagamo dejansko z mini računalniki, ki omogočajo preračun merskih vrednosti v končne rezultate že na terenu. Pri elektronskih tahimetrih v postopku polarne izmere merimo polarne količine do posameznih točk: horizontalne smeri, zenitne razdalje in poševne dolžine. S preračunom v instrumentu dobimo in hkrati izvozimo ''merjene'' koordinate točk. Kakšna je natančnost merjenih koordinat z izbranim tahimetrom, preverimo s standardiziranim postopkom, ki je predpisan s strani Mednarodne organizacije za standardizacijo – ISO. Ravno za potrebe določitve natančnosti tahimetrov pri določanju koordinat točk je bil razvit standardiziran postopek oziroma standard ISO 17123-5. Dokument, v katerem je zapisan standard ISO 17123-5:2018, predpisuje postopek terenskih meritev in izračuna, ki ga uporabljamo za določitev in ocenjevanje natančnosti merjenja koordinat z elektronskim tahimetrom ter z dodatno opremo, ki je pri meritvah potrebna. Postopek je nastavljen tako, da omogoča testiranja kateregakoli elektronskega tahimetra ter da minimizira vpliv atmosfere. V diplomski nalogi smo izvedli dva terenska preizkusa: poenostavljeni ter popolni preizkus. Vsak preizkus smo izvedli na dva načina: z oziroma brez (ročne) uporabe avtomatskega viziranja tarč. Poskušali smo v večji meri upoštevati vse predpise standardiziranega postopka ter na koncu določili oceno natančnosti merjenih koordinat. Empirično določeni standardni odklon smo v postopku statističnega testiranja primerjali z natančnostjo, ki jo podaja proizvajalec instrumenta. Upoštevali smo tudi vse dodatne vplive, ki slabšajo natančnost, da bi na koncu določili realno natančnost koordinat polarno merjenih točk.

• Language: Slovenian
• Keywords: elektronski tahimeter, standard, ISO, preizkus, natančnost
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Publisher: I. Vračar]
• Year: 2019
• PID: 20.500.12556/RUL-110956
• UDC: 528.5(043.2)
• COBISS.SI-ID: 8911457
• Publication date in RUL: 21.09.2019

Secondary language

• Language: English
• Title: Testing of the Leica Nova MS50 instrument according to the standard procedure ISO 17123-5 : graduation thesis

Abstract

TThe development of surveying instruments in surveying has led to the rapid gathering of measurements on the field. Mostly, these instruments are electronic devices that, in addition to measuring sensors, include processing and memory units. Therefore, when working with surveying instruments we actually operate whit something close to a computer, which allows us to convert measured values into final results in the field. With electronic tachymeters, in the polar measurement process, we measure polar quantities to individual points: horizontal directions, zenith angles and slope distances. With the conversion in the instrument, we obtain and simultaneously export the “measured” coordinates of the points. The accuracy of the coordinates measured with the selected tachymeter is verified by the standardized procedure prescribed by the International Organization for Standardization – ISO. It was for the purpose of determining the accuracy of tachymeters in determining the coordinates of points, the standardised procedure or standard ISO 17123-5 was developed. The document which outlines the standard ISO 17123-5:2018 prescribes the field measurement and calculation procedure that is used to determine and evaluate the precision of coordinate measurements using an electronic tachymeter as well as other required accessories. The process is configured in such a way that it allows the testing of any electronic tachymeter, and minimizes the impact of the atmosphere. In the graduation thesis, we performed two field tests; a simplified and full test. Each experiment was performed in two ways: with and without (i.g. manually) the use of automatic target sighting and measuring. We tried to follow the rules of the standardized procedure to a greater extent and finally determined the precision of the measured coordinates. The empirically determined standard deviation was, in the statistical testing process, compared to the precision provided by the instrument manufacturer. We also considered all the additional influences that affect accuracy to ultimately determine the real accuracy of the coordinates of polar measured points.

• Keywords: electronic tachymeter, standard, ISO, test, accuracy