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Development of a procedure for monitoring stone retaining walls with terrestrial laser scanning Open
The aim of this contribution is to develop a procedure for monitoring stone-retaining walls using terrestrial laser scanning (TLS). Compared to classical point-based deformation analysis, however, areal deformation analysis is still less c…
Sensor fusion of robotic total station and inertial navigation system for 6DoF tracking applications Open
This paper presents a novel approach for sensor fusion of robotic total station (RTS) and inertial navigation system (INS) to enable 6-degree-of-freedom (6DoF) pose estimation. Tight coupling of a spherical measurement model for RTS is dev…
Introduction of a Framework for the Integration of a Kinematic Robot Arm Model in an Artificial Neural Network - Extended Kalman Filter Approach Open
The aim of this paper is to introduce a model in which systematic effects can be assigned according to their origin or mode of action. The approach intends to improve the positional accuracy of a robot arm. We show the impact of unaccounte…
Investigating the sensitivity of a profile laser scanner Open
The deformation analysis of infrastructural objects like dams, bridges or tunnels is a dominant topic in engineering geodesy. Employing cost-efficient devices that react sensitively to deformations in the sub-millimeter range enables a mor…
Robust Determination of Smartphone Heading by Mitigation of Magnetic Anomalies Open
We introduce an algorithm that provides robust three-dimensional orientation of a smartphone for pedestrian indoor localization. The algorithm focuses on integration of the magnetometer and a reformulated observation model such that the in…
Integrated trajectory estimation for 3D kinematic mapping with GNSS, INS and imaging sensors: A framework and review Open
Trajectory estimation refers to the task of obtaining position and orientation estimates by fusing various sensor inputs. In kinematic mapping, global navigation satellite systems (GNSS) and inertial navigation systems (INS) are traditiona…
Investigation of space-continuous deformation from point clouds of structured surfaces Open
One approach to estimate space-continuous deformation from point clouds is the parameter-based epochal comparison of approximating surfaces. This procedure allows a statistical assessment of the estimated deformations. Typically, holistic …
Investigation of the trade-off between the complexity of the accelerometer bias model and the state estimation accuracy in INS/GNSS integration Open
The integration of Inertial Navigation Systems and Global Navigation Satellite Systems (GNSS) represents the core navigation unit for mobile platforms in open sky environments. A realistic assessment of the accuracy of the navigation solut…
Monitoring the production process of lightweight fibrous structures using terrestrial laser scanning Open
The Cluster of Excellence Integrative Computational Design and Construction for Architecture at the University of Stuttgart brings together various disciplines to jointly develop amongst other things a better understanding of processes in …
Two-epoch TLS deformation analysis of a double curved wooden structure using approximating B-spline surfaces and fully-populated synthetic covariance matrices Open
This contribution presents a B-spline-based approach of area-wise deformation analysis applied on elements of a double curved wooden tower. The monitored object is the Urbach Tower with a height of 14 m. Terrestrial laser scans from two ep…
Laser Scanner–Based Deformation Analysis Using Approximating B-Spline Surfaces Open
Due to the increased use of areal measurement techniques, such as laser scanning in geodetic monitoring tasks, areal analysis strategies have considerably gained in importance over the last decade. Although a variety of approaches that qua…
Estimating Control Points for B-Spline Surfaces Using Fully Populated Synthetic Variance–Covariance Matrices for TLS Point Clouds Open
A flexible approach for geometric modelling of point clouds obtained from Terrestrial Laser Scanning (TLS) is by means of B-splines. These functions have gained some popularity in the engineering geodesy as they provide a suitable basis fo…
Deriving adequate sample sizes for ANN-based modelling of real estate valuation tasks by complexity analysis Open
Property valuation in areas with few transactions on basis of a linear regression fails due to a not sufficient number of purchasing cases. One approach which is enhancing the available data set is to evaluate these purchasing cases togeth…
Spatio-Temporal Models for Vibration Monitoring of Elongated Structures Using Profile Laser Scans Open
Vibration monitoring is a frequent task within the general topic of Structural Health Monitoring. For this monitoring, usually accelerometers, strain gauges, fibre optic sensors or Global Navigation Satellite System (GNSS) receivers are pl…
Accelerometer Triad Calibration for Pole Tilt Compensation Using Variance Based Sensitivity Analysis Open
In Engineering Geodesy, most coordinate frames are aligned with the local vertical. For many measurement tasks, it is therefore necessary to manually (or arithmetically) align sensors or equipment with the local vertical, which is a common…
Sensing and monitoring in tunnels testing and monitoring methods for the assessment of tunnels Open
The paper presents a review of testing methods and a classification of strategies and tools in terms of technologies and techniques applied to the monitoring of tunnels. In particular, the topic is contextualized through a brief introducti…
A spatio-temporal deformation model for laser scanning point clouds Open
The establishment of the terrestrial laser scanner changed the analysis strategies in engineering geodesy from point-wise approaches to areal ones. During recent years, a multitude of developments regarding a laser scanner-based geometric …
Development of a Kalman Filter in the Gauss-Helmert Model for Reliability Analysis in Orientation Determination with Smartphone Sensors Open
The topic of indoor positioning and indoor navigation by using observations from smartphone sensors is very challenging as the determined trajectories can be subject to significant deviations compared to the route travelled in reality. Esp…