Figure - uploaded by Anatolii Vivat
Content may be subject to copyright.
Free android UTM Geo Map software for planning the geodetic network of the object of study. The figure shows that the distance between P1 and M1 is 21,648 m, and the elevation is 1 m.
Source publication
The article is devoted to the possibility of using an electronic total station for the construction of a 3D model of an engineering object. For this research was used a monument to Andrey Sheptytsky in Lviv. In work used total station Topcon IS301 with software Image Master. The binding to the international coordinate system is performed by the RTK...
Similar publications
Using drones with different purposes than only taking photos is nowadays the main direction of drone development. Drones are made for package delivery, people transport, etc. Drone equipped by GNSS RTK and prism can be used as orientation point for the free station. The idea is using drone to get coordinates of total stations inappropriate for GNSS...
This paper analyzes the use of GNSS equipment when conducting topographic surveys. It was revealed that despite the presence of a large number of modern and high-precision GNSS receivers, nowadays, the regulatory and legal framework has established significant restrictions on the use of GNSS equipment when carrying out topographic and geodetic surv...
The spectral clustering method has notable advantages in segmentation. But the high computational complexity and time consuming limit its application in large-scale and dense airborne Light Detection and Ranging (LiDAR) point cloud data. We proposed the Nyström-based spectral clustering (NSC) algorithm to decrease the computational burden. This nov...
Galileo is Europe’s Global Navigation Satellite System (GNSS), which provides improved positioning and timing data with significant benefits for many European services and users. Galileo enables users to know their exact location with greater precision than other available systems. Access to the Galileo signal in the obstructed and unobstructed env...
Citations
... The following devices are used: indicators, autocollimators, theodolites, tape measures, levels, optical quadrants, intrometers, cameras, and ET [Baran, 2012;Vivat et al. 2018]. Recently, laser scanners and robotic electronic total stations have been increasingly used for modeling in 3D space [Trevogo & Balandyuk, 2009;Trevogo, 2016;Vivat & Nazarchuk, 2019]. The use of ET is effectively applied in determining the geometric parameters of engineering structures [Baran, 2012;Vivat et al. 2018], defining the straightness of rotation of large-sized continuous-acting units [Moroz et al. 2011], monitoring hydraulic structures [Staroverov, 2020;Baran, 2011], as well as in examining linear objects in the areas affected by underground mining using ET and ground-based laser scanners [Naminat, 2020]. ...
In applied geodesy tasks, it may be necessary to determine spatial angles. When bringing a 3D design of buildings and structures to the field with the help of an electronic total station (ES), it is important to verify the spatial angles between different elements of building structures such as roof overlaps, inclined anchors, and more, using the characteristic points' spatial coordinates. Modern geodetic instruments provide sufficiently high measurement accuracy (up to 1" and 1 mm, respectively). However, measuring the required angles with surveying instruments is not always possible for various reasons. First of all, it is impossible to place the device at the vertex of an angle if the location is not accessible. This paper develops a method for determining a spatial angle whose vertex is not available for measurement. Methods and results. To achieve this goal, we consider one of the options for its determination through the application of the cosine theorem with preliminary measurement or calculation of adjacent sides and vertical angles. This article also presents an algorithm for solving the problem with an estimation of the accuracy of establishing the required parameters. The basic formulas for determining the angles of a spatial triangle with an estimate of their accuracy are proposed. The paper studies the influence of the linear measurement values of the lengths of the sides on the values of the angles of a spatial triangle with the corresponding accuracy assessment. In particular, the root mean square errors of angle calculation were determined based on these calculations and mathematical modeling, namely, the ratio of the sides of the triangle. Through indirect measurements of the tower crane boom and roof spire, the spatial angle values were determined. The inclination of the crane boom to the base resulted in α=910.712±51", while the angle of the roof spire was α=150.109±35". Scientific novelty and practical significance. On the basis of the proposed methodology and numerical experiments, spatial angles were determined and their a priori accuracy was analyzed. This confirms the influence of linear measurements of side lengths on the values of spatial angles. The obtained results make it possible to apply the proposed method in engineering and geodetic works using BIM technologies in 3D space. This method can be used in the application software of electronic total station manufacturers to determine spatial angles in space when solving engineering problems.
... Also, to eliminate the error of centering, we proposed to use the method of free station and determine the coordinates of linear-angular measurements. Using the method [Vivat, Nazarchuk, 2019] we calculated the horizontal and vertical angles of fixing 3D-marks to ensure the perpendicularity of the measuring laser. According to research [Fys, 2021], the position of the base marks was planned so that the device installation station was closest to the middle of the bases (Fig. 7a). ...
Today in Ukraine there are dozens of turbogenerators (TG) in operation, a significant part of which have been in operation for over 35 ÷ 50 years, which exceeds their service life in accordance with regulatory documents. The actual technical condition of the TG is determined by many geometrical parameters, among which the crucial ones are those that characterize it as a mechanical system (axis of the aggregate and the axis of the stator). Today, the control of the position of the axes must be performed with an accuracy of 0.5 mm, and is carried out in three ways (using a string, using an optical autoreflex system (PPS-11), using a test shaft). The purpose of these studies is to develop a method for monitoring the geometric parameters of the TG stator when replacing it with geodetic methods using high-precision electronic total stations and its testing on site. Based on previous research, we propose to solve the following problems by the spatial method of electronic total station using a high-precision total station Leica TCRP1201R300. We performed a priori estimation of accuracy and a number of experiments (research to determine refocusing error, determination of distance measurement error at short lengths using a spherical reflector, study of the effect of non-perpendicularity of the measuring laser to the reflector) to develop methods for improving measurement accuracy using electronic total station. This technique has been tested on site during the repair (replacement) of the generator stator. As a result of the work carried out, the spatial position of the axes of the aggregate and the stator was determined with an accuracy of 0.3 mm, which were fixed in the conditional coordinate system by four marks. The method provides for the selection of optimal conditions for electronic tacheometer measurements, which compensate for errors in the initial data, instrumental, external conditions, sighting, centering and fixing. Also, the method provides for the control of each stage of work on a standard deviation of up to 0.2 mm. The number of measurement methods is determined by achieving the accuracy of each stage of 0.2 mm.
