Trimble CX laserskanneri efektiivsuse ja täpsuse analüüs
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Kuupäev
2019
Kättesaadav alates
10.09.2019
Autorid
Ruul, Kristi
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Eesti Maaülikool
Abstrakt
Eesti Maaülikooli geomaatika õppetool soetas 2018. aastal kasutatud Trimble CX
laserskanneri. Antud mõõdistusseade vajas töökorda seadmist ning tööprotsessi kirjeldamist.
Valmendamist vajas skanneri toitesüsteem, juhttarkvara, salvestusmeedia ning väliarvuti.
Käesoleva bakalaureusetöö eesmärgiks on välja selgitada, milline on Trimble CX skanneri
kõige efektiivsem meetod mõõtmiste läbi viimiseks. Lisaks analüüsitakse seadme kasutus
tõhusust ning täpsust välitöödel. Töö hüpoteesiks püstitati, et Trimble CX skanner on
efektiivne ja piisavalt täpne tänapäevases kontekstis.
Trimble CX töökorda seadmiseks sobiliku salvestusmeedia ja väliarvuti seadete valiku
leidmiseks kasutati katse-eksitus meetodit. Instrumenti täpsusese hindamiseks teostati 19.
märtsil 2019. aastal Tartu Kaarsillal laserskaneerimine. Trimble CX seadmega mõõdistatud
andmeid võrreldi laserkaugusmõõtjaga mõõdetud tulemustega.
Leiti, et kõige efektiivsem on mõõtmisi läbi viia juhtpuldi kaudu, kuna ei esine ühendus
probleeme nagu väliarvuti ja skanneri vahel. Lisaks ei kulu lisaaega välitöödel
andmeteformaadi ümbersalvestamiseks. Näiteks väliarvuti kaudu juhitud 7 minutine
skannering kestab umbes 17 minutit, kuna loodud failiformaati salvestatakse ümber. Töös
selgitati välja et, Trimble CX on piisavalt täpne tänapäevases kontekstis, kuid mitte piisavalt
tõhus. Skanneriga skaneeritud mõõtmete võrdlusel kaugusmõõturiga selgus, et mõõtmistäpsus
üksikust punktipilvest jääb 5 mm piiresse ning registreeritud punktipilve suhtes kuni 7 mm.
Trimble CX seadme võimekuse nüüdisaegses keskkonnas mitte sobivust tugineti teadmisel et,
skanneri kulub soojendamiseks välitingimustes 10 kuni 20 minutit iga enne mõõtmist
mõõtmise järel. Samuti juhtpult ja akud on skanneri välised, mis teeb töötlemisprotsessi väga
kohmakaks ja tülikaks.
The purpose of this Bachelor's thesis is to find the most effective method of performing measurements with Trimble CX scanner. In addition, efficiency and accuracy of fieldwork use are analyzed. Hypothesis is that Trimble CX scanner is effective and accurate enough in today's context. Test-and-error method was used to find the appropriate recording media, control computer and setup. To find out accuracy of the instrument, laser scanning was carried out on on Tartu Kaarsild at March 19, 2019. Measurements of Trimble CX were compared to the measurements that were taken with a laser rangefinder. Most effective way to perform measurements is through a control panel, because there are no connection problems between an external computer and a scanner. In addition, no extra time is spent on data format conversion to save. For example 7 minutes scanning with field computer takes about 17 minutes because the file is converted then re-saved. According to measurements Trimble CX is accurate enough in today's context, but not efficient enough. Comparison of the scanner scaled dimensions with a distance meter, revealed that the measurement accuracy of a single point cloud is within 5 mm. Since scanner needs to warm up from 10 to 20 minutes after every measurement, then Trimble CX is not eficient enough for fieldwork compared to state of the art devices. Also, the control panel and batteries are external to the scanner, making the measuring process clumsy and cumbersome.
The purpose of this Bachelor's thesis is to find the most effective method of performing measurements with Trimble CX scanner. In addition, efficiency and accuracy of fieldwork use are analyzed. Hypothesis is that Trimble CX scanner is effective and accurate enough in today's context. Test-and-error method was used to find the appropriate recording media, control computer and setup. To find out accuracy of the instrument, laser scanning was carried out on on Tartu Kaarsild at March 19, 2019. Measurements of Trimble CX were compared to the measurements that were taken with a laser rangefinder. Most effective way to perform measurements is through a control panel, because there are no connection problems between an external computer and a scanner. In addition, no extra time is spent on data format conversion to save. For example 7 minutes scanning with field computer takes about 17 minutes because the file is converted then re-saved. According to measurements Trimble CX is accurate enough in today's context, but not efficient enough. Comparison of the scanner scaled dimensions with a distance meter, revealed that the measurement accuracy of a single point cloud is within 5 mm. Since scanner needs to warm up from 10 to 20 minutes after every measurement, then Trimble CX is not eficient enough for fieldwork compared to state of the art devices. Also, the control panel and batteries are external to the scanner, making the measuring process clumsy and cumbersome.
Kirjeldus
Bakalaureuseastme uurimustöö
Geodeesia ja maakorralduse õppekaval
Märksõnad
bakalaureusetööd, takseerimine, punktipilved, Kaarsild