scholarly journals System for determining the parameters of a sea vessel by analyzing a photo image

2021 ◽  
Vol 2061 (1) ◽  
pp. 012078
Author(s):  
D E Studenikin ◽  
E A Kuku
Keyword(s):  
Spatial Orientation ◽  
Depth Map ◽  
Observation Point ◽  
Measuring System ◽  
Practical Implementation ◽  
Photographic Image ◽  
Static Image ◽  
Sufficient Distance ◽  
Distance Mapping ◽  
Photo Image

Abstract In this paper, a method is considered for determining the parameters of a sea vessel, such as its spatial orientation and the distance from the observation point to this vessel from a photographic image to facilitate the task of identifying vessels at night. A measuring system for practical implementation is proposed, consisting of an optical segment, a segment for determining the angle of the vessel by the image, a segment for determining the distance to the object, and a segment for accumulating and filtering data. An algorithm for extracting the parameters of ship lights from a photographic image, their analysis, and the calculation of the quantities required for classification are described. The effectiveness of various classifier architectures for determining the angle of the vessel was experimentally tested, among which the SVM architecture was the most effective. A method for compiling a “depth map” for a static image based on the data of real distances to objects in the daylight image and the coordinates of the corresponding pixels in the same image is described. The method of backpropagation of the error is used for the obtained distances in the corresponding segment of the system based on the existence of the position-distance mapping. The model of the “depth map” constructed based on these data made it possible to obtain a sufficient distance to the object from the photograph.

scholarly journals Modelling and Simulation Testing of Main Bearing Loads and Strains in Crankshafts Caused by Deviations in the Position of the Shaft Journal and Bearing Axes

2020 ◽  
Vol 3 (1) ◽  
pp. 41-56
Author(s):  
Krzysztof Nozdrzykowski ◽  
Zenon Grządziel
Keyword(s):  
Measuring System ◽  
Practical Implementation ◽  
Main Bearing ◽  
Elastic Deformations ◽  
Flexible Support ◽  
Measuring Techniques ◽  
Simulation Testing ◽  
Bearing Loads ◽  
Reference Measurements ◽  
Shaft Journal

AbstractThis article presents the results of a simulation, testing the variation of main bearing loads and strains in crankshafts caused by geometrical deviations of the bearing system to justify the necessity and purposefulness of measurements of both the shape and axes position deviations of crankshaft journals. Measurements of these deviations at the existing level of applied measuring techniques are significantly limited. The research also accentuates the practical implementation of a measuring system equipped with the so-called flexible support system for the measured object, developed at the Maritime University of Szczecin. This system makes it possible to eliminate elastic deformations of the crankshaft due to its own weight, whereby the measurements of geometrical deformations of the crankshafts can be carried out with appropriate accuracy in conditions corresponding to the non-reference measurements when determining the object measured in counterpoints. The obtained results have fully confirmed the purposefulness of the conducted research and the validity of the theses.

A New Mini Measuring System for the Analysis of Photographic Image Micro-Structure

1991 ◽  
Vol 39 (6) ◽  
pp. 236-240
Author(s):  
P. Qittg ◽  
X. Gang ◽  
Z. Hua-feng ◽  
W. Wen-hui
Keyword(s):  
Measuring System ◽  
Micro Structure ◽  
Photographic Image

scholarly journals The structure of ideas about yourself and others (according to a photographic image and a schematic image)

2019 ◽  
Vol 12 (3) ◽  
pp. 19-27
Author(s):  
I.I. Besprozvannaya ◽  
A.V. Zhegallo
Keyword(s):  
Factor Structure ◽  
Personal Characteristics ◽  
The Other ◽  
Self Assessment ◽  
Assessment And Evaluation ◽  
Photographic Image ◽  
Three Factor ◽  
Photo Image

The participants in the study assessed themselves according to the “personal differential” questionnaire and also performed the evaluation of the other using photo images or graphic schemes. When performing a self-assessment and evaluation of another in a photo image, the three-factor structure described by the authors of the methodology is mainly reproduced: “assessment”, strength ”,“ activity ”. The structure of assessments of another according to the schematic image is substantially different from the classical one, which indicates the fundamental differences in the perception of individual — personal characteristics by the schematic person.

scholarly journals Non-Contact High Voltage Measurement in the Online Partial Discharge Monitoring System

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5777
Author(s):  
Krzysztof Walczak ◽  
Wojciech Sikorski
Keyword(s):  
Monitoring System ◽  
High Voltage ◽  
Field Tests ◽  
Measuring System ◽  
Practical Implementation ◽  
Voltage Measurement ◽  
Voltage Ratio ◽  
Wide Range ◽  
Capacitive Probe ◽  
Electromagnetic Disturbances

The article presents an innovative system for non-contact high voltage (HV) measurement, which extends the measurement capabilities of a portable partial discharges (PD) monitoring system intended for diagnostics of power transformers. The proposed method and the developed measuring system are based on the use of a capacitive probe, thanks to which the high voltage measurement is safe (galvanic separation from the objects at ahigh potential). It is also flexible because the voltage ratio of this system can be configured in a wide range by changing the probe’s position. The proposed solution makes the portable PD monitoring system fully autonomous and independent of the substation systems and devices. The article presents both the concept of the non-contact HV measurement system and its practical implementation. The procedure for determining the voltage ratio and measurement uncertainty, which is at an acceptable level of 1–5% in laboratory conditions, was discussed in detail. In addition, the article discusses the digital filtering and wavelet de-noising methods implemented in the software of the monitoring system, which makes it possible to measure the voltage in the presence of strong electromagnetic disturbances occurring at the substation. Finally, the results of field tests carried out on a 250 MVA power transformer are presented, which confirmed the high accuracy of the HV measurement using a capacitive probe and the advantages of this technique.

Image reconstruction by solving the inverse problem in ultrasonic transmission tomography system

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Tomasz Rymarczyk ◽  
Konrad Kania ◽  
Michał Gołąbek ◽  
Jan Sikora ◽  
Michał Maj ◽  
...  
Keyword(s):  
Image Reconstruction ◽  
Measuring System ◽  
Practical Implementation ◽  
Projection Data ◽  
Reconstruction Algorithms ◽  
Transmission Tomography ◽  
Content Type ◽  
Fermat Principle ◽  
Finite Set ◽  
Transformation Methods

Purpose The purpose of this study is to develop a reconstruction and measurement system for data analysis using ultrasonic transmission tomography. The problem of reconstruction from the projection is encountered in practical implementation, which consists in reconstructing an image that is an estimation of an unknown object from a finite set of projection data. Reconstructive algorithms used in transmission tomography are based on linear mathematical models, which makes it necessary to process non-linear data into estimates for a finite number of projections. The application of transformation methods requires building a mathematical model in which the projection data forming the known and unknown quantities are functions with arguments from a continuous set of real numbers, determining the function describing the unknown quantities sought in the form of inverse relation and adapting it to operate on discrete and noisy data. This was done by designing a tomographic device and proprietary algorithms capable of reconstructing two-dimensional images regardless of the size, shape, location or number of inclusions hidden in the examined object. Design/methodology/approach The application consists of a device and measuring sensors, as well as proprietary algorithms for image reconstruction. Ultrasonic transmission tomography makes it possible to analyse processes occurring in an object without interfering with the examined object. The proposed solution uses algorithms based on ray integration, the Fermat principle and deterministic methods. Two applications were developed, one based on C and implemented on the embedded device, while the other application was made in Matlab. Findings Research shows that ultrasonic transmission tomography provides an effective analysis of tested objects in closed tanks. Research limitations/implications In the presented technique, the use of ultrasonic absorption wave has been limited. Nevertheless, the effectiveness of such a solution has been confirmed. Practical implications The presented solution can be used for research and monitoring of technological processes. Originality/value Author’s tomographic system consisting of a measuring system and image reconstruction algorithms.

Optical sensor of components concentration in solution

Sensor Review ◽  
2019 ◽  
Vol 39 (5) ◽  
pp. 704-707
Author(s):  
Igor S. Nadezhdin ◽  
Aleksey G. Goryunov ◽  
Yuliya Yu Nadezhdina
Keyword(s):  
Sensitive Element ◽  
Light Signal ◽  
Measuring System ◽  
Practical Implementation ◽  
Remote Measurement ◽  
Content Type ◽  
Optical Cable ◽  
Require Power ◽  
Fiber Optical ◽  
Measurement Principle

Purpose This paper aims to focus on the development of an optical concentration sensor designed for measuring the concentration of components in solutions. Design/methodology/approach The operating principle of the developed sensor is based on the Bouguer–Lambert–Beer law. An optical measuring system using fiber optical cables was used for the practical implementation of the concentration sensor. Findings As a result of fiber optical cable use in the concentration sensor, the remote measurement principle was implemented, ensuring the instrument’s reliability and the reduction of operating costs. Originality/value The advantage of the proposed measuring system is that the sensitive element is maintenance-free, does not require power supply and can operate under severe industrial conditions. Using a fiber optic cable to transmit a light signal allows placing the sensitive element at a distance of several tens of meters from the electronics unit (the smart part).

scholarly journals Algorithm for Correcting Target Coordinates in the Information-Measuring System of a Radar Station Based on Information about Spatial Orientation

2020 ◽  
Vol 23 (2) ◽  
pp. 55-62
Author(s):  
U. R. Naimov
Keyword(s):  
Spatial Orientation ◽  
Tracking System ◽  
Experimental Studies ◽  
Measuring System ◽  
Correction Algorithm ◽  
Information Measuring System ◽  
Orientation Information ◽  
And Performance ◽  
Coordinate Correction

Introduction. The concepts of constructing promising radar systems (radars) show that these will be integral type complexes. The creation of such systems implies the presence in their composition of an information system consisting of channels that produce a functionally completed procedure for processing signals and information to solve a definite task.Aim. Development of a target coordinate correction algorithm based on spatial orientation information.Materials and methods. The tasks were solved by methods of mathematical analysis and numerical modeling. To justify reliability and performance of the proposed algorithm, a model was developed. The model allowed one to obtain accuracy characteristics of the algorithm.Results. As a result of the simulation, the accuracy characteristics of the target coordinate correction algorithm based on spatial orientation information were investigated. It determines the quality of building of the target trajectory and the quality of the target tracking system. The structure and the description of the developed algorithm were given, an implementation option was shown. The results of estimation of the accuracy of the algorithm were presented.Conclusion. As a result of the analysis of the target coordinate correction algorithm based on information about the target’s spatial orientation, as well as modeling of its operation, a conclusion about the reliability and the performance of the proposed algorithm was drawn The presented data of experimental studies on the accuracy characteristics of the proposed algorithm showed the feasibility of the decisions made. The presented results allow one to determine the most appropriate and effective way to develop simplified versions of the algorithm.

scholarly journals Algorithm for correcting the image depth map based on the points brightness and their distance from the observation point

2020 ◽  
Vol 47 (3) ◽  
pp. 82-92
Author(s):  
S. I. Korotkevich ◽  
Yu. V. Minaeva
Keyword(s):  
Stereo Vision ◽  
Depth Map ◽  
Human Head ◽  
Observation Point ◽  
Mathematical Software ◽  
Depth Maps ◽  
Trained Personnel ◽  
Mathematical Algorithms ◽  
Image Contour

Objective. Modeling the human head is a significant problem that arises in a wide variety of fields of science and technology. Existing active technologies for reconstruction and modeling of the object under study require expensive equipment and trained personnel. Methods. An alternative is to use passive methods that perform image processing using special mathematical algorithms. One of these methods is the stereo vision, which is based on the use of paired images taken simultaneously with several cameras positioned and calibrated in a certain way. However, a common drawback of stereo vision methods is the possibility of obtaining erroneous depth maps due to poorquality source images or incorrect camera and lighting settings. Results. Procedures were developed that use additional parameters of image points, which can be used to correct depth maps to avoid the appearance of defects. To achieve this objective, the existing mathematical software for processing photo and video materials is analyzed; methods for suppressing noise in the image, obtaining an image contour, as well as a method for obtaining a 3D object matrix based on changing the direction of illumination are proposed; the algorithm is tested on a test example. Conclusion. The developed technique should improve the quality of the depth map of the processed image and thus make the modeling procedures more efficient. 

scholarly journals On analysis of signals of seismic acoustic emission of surface sedimentary rocks in Kamchatka

2021 ◽  
pp. 150-158
Author(s):  
В.Н. Сычев ◽  
М.Е. Чешев ◽  
М.А. Мищенко
Keyword(s):  
Statistical Physics ◽  
Sedimentary Rocks ◽  
Observation Point ◽  
Measuring System ◽  
Probability Density Distribution ◽  
Distribution Law ◽  
Near Surface ◽  
Seismic Receiver ◽  
Stochastic Time Series ◽  
Stochastic Time

На Камчатке в пункте наблюдений “Карымшина” при помощи измерительной системы на основе трехкомпонентного пьезокерамического сейсмоприемника проводится мониторинг сигналов сейсмоакустической эмиссии приповерхностных осадочных пород. На выходе измерительной системы регистрируется колебательное ускорение в частотном диапазоне 0.5–400 Гц. Анализ проводится на основе записей сейсмоакустических сигналов от группы региональных землетрясений 2019 года с энергетическим классом Ks > 10.0. Функция распределения плотности вероятностей такого сигнала не всегда описывается нормальным законом распределения, поэтому для исследования подобных стохастических временных рядов подходят методы статистической физики, в рамках которых рассматриваются свойства автомодельности этих сигналов. In Kamchatka, at the observation point “Karymshina”, using a measuring system based on a three-component piezoceramic seismic receiver, the signals of seismoacoustic emission of near-surface sedimentary rocks are monitored. At the output of the measuring system, an oscillatory acceleration is recorded in the frequency range of 0.5-400 Hz. The analysis is based on records of seismoacoustic signals from several regional earthquakes in 2019 with an energy class of Ks > 10:0. The probability density distribution function of such a signal is not always described by the normal distribution law; therefore, statistical physics methods are suitable for studying such stochastic time series, within which the properties of self-similarity of these signals are considered.

An Overview of Digital Image Processing and Recognition (Invited Paper)

1982 ◽  
Vol 40 ◽  
pp. 700-702
Author(s):  
R. C. Gonzalez
Keyword(s):  
Image Processing ◽  
New York ◽  
Digital Image Processing ◽  
Digital Image ◽  
Practical Implementation ◽  
Submarine Cable ◽  
Vigorous Growth ◽  
Digitized Pictures ◽  
Processing Techniques ◽  
And Storage

Interest in digital image processing techniques dates back to the early 1920's, when digitized pictures of world news events were first transmitted by submarine cable between New York and London. Applications of digital image processing concepts, however, did not become widespread until the middle 1960's, when third-generation digital computers began to offer the speed and storage capabilities required for practical implementation of image processing algorithms. Since then, this area has experienced vigorous growth, having been a subject of interdisciplinary research in fields ranging from engineering and computer science to biology, chemistry, and medicine.

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