Prismata mõõtmise rakendused tahhümeetriga Trimble S6 DR300+
Laen...
Kuupäev
2012
Kättesaadav alates
ainult raamatukogus, only in library
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Prismata mõõtmine ei ole mõõdistustööde puhul alati esimene valik. Bakalaureusetöö raames on uuritud, milliste tööde puhul leiab kasutust prismata mõõdistamine ning millised on antud mõõdistusmeetodi plussid ja miinused.
Töö eesmärgiks on uurida prismata mõõtmise erinevaid tehnoloogiaid, ohutust ja kasutusvaldkondi. Praktilises osas on uuritud laserskaneerimise meetodeid ning ajakulu, kasutades tahhümeetrit Trimble S6 DR300+.
Lähtuvalt objektist on skaneerimisel oluline valida sobiv mõõdistusmeetod ja –intervall. Sellest sõltub mõõdistuseks kuluv aeg ja lõpptulemuseks saadava 3D kujutise detailsus. Oluline roll on laserskaneerimise puhul ka järeltöötlusprogrammil. AutoCAD 2012 võimaldab mõõdetud punktipilvest eraldada ebaolulised punktid ning saavutada reaalne joonis, võrreldes mõõdetud objektiga. Programm võimaldab joonist vaadelda ka 3D kujutisena.
Prismata mõõtmine on kasulik ka üksikmõõtmiste puhul, kus kauguse täpsus võrreldes prismaga on minimaalne või puudub. Praktilises osas teostatud test näitab, et prismaga ja prismata mõõtmisel tuleb kauguse erinevuseks ainult üks millimeeter.
Prismata mõõtmine ja laserskaneerimine leiavad üha enam kasutust. Kui algselt kasutati antud mõõtmismeetodit põhiliselt geodeetiliste tööde sooritamiseks, siis tänapäeval leiab prismata mõõtmine kasutust nii arhitektuurimälestiste dokumenteerimisel kui ka kriminalistikas. See annab alust arvata, et prismata mõõtmist rakendatakse tulevikus erinevates valdkondades järjest rohkem.
Reflectorless survey is not always the first choice for geodedic works. In this study, the use of reflectorless measurement and its pros and cons has been studied. The aim of this study is also to analyze different technologies, safety and field of use of reflectorless survey. In practical part, there are studied different methods and time expenditure of laser scanning using Trimble S6 DR300+ total station. Before scanning , it is important to choose the right measuring method and interval. These choices will designate the measuring time and the level of detail of 3D object. Also a post-processing program plays an important role. AutoCAD2012 enables to allot insignificant points from measured point cloud and helps to make the real image of measured object. Using AutoCAD2012 program, it is possible to view the object as a 3D model. Reflectorless survey is also useful for a single measurement, the accuracy of distance compared with measurement using a prism is minimal. A test, taken in practical part, shows that the difference of distance using prism and prismless measurement was only one millimeter. The use of reflectorless survey and laser scanning is increasing rapidly. Initially, that kind of measurement was mostly used for geodedic jobs. Nowadays, reflectorless survey is used for architectural documentation as well as in forensics. This suggests that reflectorless survey is going to be used also in future and in various fields.
Reflectorless survey is not always the first choice for geodedic works. In this study, the use of reflectorless measurement and its pros and cons has been studied. The aim of this study is also to analyze different technologies, safety and field of use of reflectorless survey. In practical part, there are studied different methods and time expenditure of laser scanning using Trimble S6 DR300+ total station. Before scanning , it is important to choose the right measuring method and interval. These choices will designate the measuring time and the level of detail of 3D object. Also a post-processing program plays an important role. AutoCAD2012 enables to allot insignificant points from measured point cloud and helps to make the real image of measured object. Using AutoCAD2012 program, it is possible to view the object as a 3D model. Reflectorless survey is also useful for a single measurement, the accuracy of distance compared with measurement using a prism is minimal. A test, taken in practical part, shows that the difference of distance using prism and prismless measurement was only one millimeter. The use of reflectorless survey and laser scanning is increasing rapidly. Initially, that kind of measurement was mostly used for geodedic jobs. Nowadays, reflectorless survey is used for architectural documentation as well as in forensics. This suggests that reflectorless survey is going to be used also in future and in various fields.
Kirjeldus
Märksõnad
prismata mõõtmine, mõõdistamine, lasermõõtmine, laserskaneerimine, tahhümeetrid, bakalaureusetööd