Use of Laser Targeting in Precise Machinery Surveys

Teskey, W. F.; Bayly, D. A.; Martell, H.

doi:10.1061/(asce)0733-9453(1993)119:2(59)

Cited by 6 publications

(2 citation statements)

References 2 publications

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“…The main geometric conditions for the operation of RK are: The longitudinal axis of the kiln and the axes of the carrier tires must be identical during operation; axes of the bearing of the radial rollers must be parallel and symmetrical with the longitudinal axis of the kiln; the correct clearance must be between the axial rollers and sidewalls of the tires, with respect to the temperature compensation in the longitudinal direction. Additional measurements are mainly a control measurement of the radius of bearing rings and radial rollers and the measurement of the RK shell [9,10].…”

Section: Introductionmentioning

confidence: 99%

Analytical Determination of Geometric Parameters of the Rotary Kiln by Novel Approach of TLS Point Cloud Segmentation

et al. 2020

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This research focused on determining a rotary kiln’s geometric parameters in a non-traditional geodetic way—by deriving them from a survey realized by a terrestrial laser scanner (TLS). The point cloud obtained by TLS measurement was processed to derive the longitudinal axis of the RK. Subsequently, the carrier tires’ geometric parameters and shell of the RK during the shutdown were derived. Manual point cloud selection (segmentation) is the base method for removing unnecessary points. This method is slow but precise and controllable. The proposed analytical solution is based on calculating the distance from each point to the RK’s nominal axis (local radius). Iteration using a histogram function was repeatedly applied to detect points with the same or similar radiuses. The most numerous intervals of points were selected and stored in separate files. In the comparison, we present the conformity of analytically and manually obtained files and derived geometric values of the RK-radiuses’ spatial parameters and coordinates of the carrier tires’ centers. The horizontal (X and Y directions) and vertical (Z-direction) of root–mean–square deviation (RMSD) values are up to 2 mm. RMSD of the fitting of cylinders is also up to 2 mm. The center of the carrier tires defines the longitudinal axis of the RK. Analytical segmentation of the points was repeated on the remaining point cloud for the selection of the points on the outer shell of the RK. Deformation analysis of the shell of the RK was performed using a cylinder with a nominal radius. Manually and analytically processed point clouds were investigated and mutually compared. The calculated RMSD value is up to 2 mm. Parallel cuts situated perpendicularly to the axis of the RK were created. Analysis of ovality (flattening) of the shell was performed. Additionally, we also present the effect of gradually decreasing density (number) of points on the carrier tires for their center derivation.

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Section: Introductionmentioning

confidence: 99%

Analytical Determination of Geometric Parameters of the Rotary Kiln by Novel Approach of TLS Point Cloud Segmentation

et al. 2020

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“…As misalignment of kiln axis can cause severe economic distress to the owner due to the cost of wear and premature failure of components, the rotary kiln industry has responded with various techniques to monitor and align kiln axis. Using laser targeting, Teskey [1] developed an electronic theodolite system and applied it to kiln alignment. Gebhart [2] derived the state of alignment by direct and continuous non-contact measurement to the rotating kiln shell.…”

Section: Introductionmentioning

confidence: 99%

Monitoring and Optimum Alignment of Kiln Axis

Xiao

2007

Second International Conference on Innovative Computing, Informatio and Control (ICICIC 2007)

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The rotating center of kiln cross-section can be measured exactly by displacement measurement along zero-deformation direction of shell cross-section, whose measuring principle is studied. In order to distribute kiln loads evenly and minimize axis deflections, the fuzzy optimization model of kiln axis alignment is set up. The results show that fuzzy optimum alignment of kiln axis can improve kiln performance greatly by making kiln axis as straight as possible and distributing kiln loads equally.

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General solution to kiln support reactions and multi-objective fuzzy optimization of kiln axis alignment

Xiao

Chen

2007

Struct Multidisc Optim

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Use of Laser Targeting in Precise Machinery Surveys

Cited by 6 publications

References 2 publications

Analytical Determination of Geometric Parameters of the Rotary Kiln by Novel Approach of TLS Point Cloud Segmentation

Analytical Determination of Geometric Parameters of the Rotary Kiln by Novel Approach of TLS Point Cloud Segmentation

Monitoring and Optimum Alignment of Kiln Axis

General solution to kiln support reactions and multi-objective fuzzy optimization of kiln axis alignment

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