The assessment of the application of terrestrial laser scanning for measuring 
the geometrics of cooling towers

Głowacki, Tadeusz; Grzempowski, Piotr; Sudol, E. David; Wajs, Jarosław; Zając, Marcin

doi:10.15576/gll/2016.4.49

Cited by 11 publications

(7 citation statements)

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“…Wybór obiektu został podyktowany charakterystyką konstrukcji przemysłowej samego budynku stawiającej przed prowadzącymi prace pomiarowe wiele wyzwań (Głowacki, Grzempowski, Sudoł, Wajs i Zając, 2016;rys. 2).…”

Section: Opis Obiektu I Zakres Wykonanych Pracunclassified

Pomiar inwentaryzacyjny obiektów przemysłowych przy użyciu naziemengo skaningu laserowego w aspekcie wdrażania technologii BIM

Uchanski¹,

Karsznia

2018

ACTA SCIENTIARUM POLONORUM - Architectura Budownictwo

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Section: Opis Obiektu I Zakres Wykonanych Pracunclassified

Pomiar inwentaryzacyjny obiektów przemysłowych przy użyciu naziemengo skaningu laserowego w aspekcie wdrażania technologii BIM

Uchanski¹,

Karsznia

2018

ACTA SCIENTIARUM POLONORUM - Architectura Budownictwo

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“…For detailed measurements, laser scanning is a suitable method, whose precision is similar to total station. Laser scanning is faster and gives more data on tower conditions for further analysis [12][13][14][15][16]. High humidity is not a suitable environment for reinforced concrete.…”

Section: Introductionmentioning

confidence: 99%

Damage detection on cooling tower shell based on model textures

Zahradník,

Roučka

2024

CEJ

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Ensuring the structural integrity of cooling towers is paramount for safety and efficient operation. This paper presents a novel approach for detecting damage on cooling tower shells, utilising textures derived from laser scanning and close-range photogrammetry. The proposed method delves beyond the limitations of solely relying on colour information by harnessing the rich details embedded in various textures, including diffuse, normal, displacement, and occlusion. The study demonstrates the efficacy of this approach for identifying significant concrete damage. A Convolutional Neural Network (CNN) trained on diffuse textures successfully detects high damage instances with minimal misdetection. However, accurately pinpointing low damage, often manifesting as subtle cracks, and mimicking other patterns like air pores, ribbing, and colour variations, presents a formidable challenge. To tackle this challenge, the authors introduce a novel "composed raster layer" that merges information from multiple textures. This pre-processed layer amplifies the visual cues associated with low damage, facilitating its differentiation from similar patterns. While the current implementation employing multi-resolution segmentation and rule-based classification exhibits promising results, further optimization is acknowledged to refine the accuracy of low damage detection. The successful application of textures commonly used in rendering techniques underscores their remarkable potential for enhancing damage detection in civil engineering applications. While acknowledging limitations such as the analysis of a single cooling tower and the reliance on specific software for damage detection, the study proposes future research directions. This research holds significant implications for the field of civil engineering by offering a promising approach for automated and efficient damage detection on cooling tower shells.

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“…Cooling towers are high-rise and thin reinforced concrete buildings designed in many fields including power plants for their high ability to cool water in closed circuit. Their major function is to remove heat from wastewater and transfer it to the atmosphere via evaporation [3,4]. As a result, these structures are exposed to significant temperature changes.…”

Section: Introductionmentioning

confidence: 99%

Deformation of High Rise Cooling Tower through Projection of Coordinates Resulted from Terrestrial Laser Scanner Observations onto a Vertical Plane

Beshr,

Basha,

El-Madany

et al. 2023

IJGI

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The appearance and development of new construction materials, technology and accurate geodetic instruments have led to the necessity of their inevitable use in the health monitoring, maintenance, and restoration of civil structures and special structures such as high-rise cooling towers. This paper presents an accurate practical and analytical method for determining the structural deformation and axis inclination of high rise cooling towers using terrestrial laser scanner (TLS) observations through the projection of tower surface points coordinates on a vertical plane. Four cooling towers in El-Mahla El-Kubra city, Egypt are observed and studied. Two of them with height 56 m, and the others were 36 m height. The studied four towers have different cross-section diameters along the tower height. Each tower has a cone shape with a curved wall. The equation of the tower wall is determined using TLS observations and least squares adjustment techniques. The equations of cone projection with a curved wall are derived and presented in this paper. From TLS observations, the radii and accuracy of each 2 m tower height are determined with center coordinates, and then the inclination of the tower axis is calculated and drawn. From the results of TLS observations, data processing, and analysis using the suggested techniques, it is deduced that there is a deformation in tower walls with small values. The specified technique for observations collection and TLS data analysis through projection on a vertical plane is significant and valuable for determining the structural deformation of circular high rise buildings and towers. From the results, there are obvious deformation values in some cooling towers, so maintenance work must be included. The towers also must be checked and monitored several times at brief intervals.

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The assessment of the application of terrestrial laser scanning for measuring the geometrics of cooling towers

Cited by 11 publications

References 0 publications

Pomiar inwentaryzacyjny obiektów przemysłowych przy użyciu naziemengo skaningu laserowego w aspekcie wdrażania technologii BIM

Pomiar inwentaryzacyjny obiektów przemysłowych przy użyciu naziemengo skaningu laserowego w aspekcie wdrażania technologii BIM

Damage detection on cooling tower shell based on model textures

Deformation of High Rise Cooling Tower through Projection of Coordinates Resulted from Terrestrial Laser Scanner Observations onto a Vertical Plane

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