3D Laser Scanning Pointcloud Processing Uncertainty Estimation for Fuel Tank Volume Calibration
- PDF / 1,015,231 Bytes
- 9 Pages / 595.276 x 790.866 pts Page_size
- 41 Downloads / 231 Views
ORIGINAL PAPER
3D Laser Scanning Pointcloud Processing Uncertainty Estimation for Fuel Tank Volume Calibration ˇ Nakutis M. Knyva* , V. Knyva, A. Mesˇkuotien_e, P. Kuzas, D. Gailius and Z Kaunas University of Technology, Studentu˛ str., 50-457 Kaunas, Lithuania Received: 18 November 2019 / Accepted: 30 January 2020 Metrology Society of India 2020
Abstract: The implementation of modern 3D scanning method for horizontal fuel tanks’ calibration applications proposes versatility and advantages over the currently used volumetric method which requires using of liquid filler (in most cases water, and in some countries—gasoline). However, the data scatter in the 3D pointcloud deteriorates the accuracy of the volume calculation algorithm output and therefore increases the fuel tank volume measurement uncertainty. In this paper, the preprocessing method of the 3D pointcloud data is defined and the application for calibration of the horizontal fuel tanks is discussed. The uncertainty analysis and estimation of the horizontal fuel tank calibration is performed in this work implementing 3D pointcloud FIR filtering and regression preprocessing techniques. The mathematical model of the volume measurement and graduation was estimated, and the uncertainty sources were identified. The horizontal fuel tank graduation table is developed, and fragments of the calibration results using the scanning data from four fuel tanks with recommendations for the 3D pointcloud data processing are presented in this work. Keywords: Horizontal fuel tank; Fuel tank calibration; 3D laser scanning; 3D pointcloud filtering and regression; Uncertainty estimation tank volume. Water density is different from the fuel density.
1. Introduction In order to ensure the traceability of volume measurement and to comply with existing state standards of a fuel storage [1–3], the calibration of horizontal fuel tanks is performed each 5 years [4–6]. The volumetric method is developed and currently used [7] for calibration of the fuel tanks, but due to amount of consumed materials, workforce and high expenses, this method can be replaced by a geometric calibration method. The geometric method itself includes 3D scanning procedure and subsequent data processing. The main disadvantages of the volumetric method are: •
• •
Time expenses. The calibration procedure can take up to 4–5 h depending on the tank capacity, which interrupts the operation of a facility; Work force. At least two metrology specialists or engineers are required to perform the calibration; Wastewater. The calibrated tank must be filled with water, and the volume of water required is equal to the
*Corresponding author, E-mail: [email protected]
The advantage of the present volumetric method which is lower cost because of the measurement instruments (precision flow meter, reference level meter) [8] used during the calibration procedure. A relatively expensive 3D scanner is utilized in the geometric method, which can be considered as the main disadvantage of the proposed method. The modern ap
Data Loading...
