The automated laser comparator for calibration of digital equipment leveling

2018 ◽  
Vol 933 (3) ◽  
pp. 17-22 ◽  
Author(s):  
A.N. Prusakov ◽  
A.I. Spiridonov ◽  
A.A. Prusakov
Keyword(s):  
Measurement Errors ◽  
Measuring System ◽  
Electronic Components ◽  
Calibration Laboratory ◽  
Linear Coefficient ◽  
Bar Code ◽  
Verification Process ◽  
Vertical Positioning ◽  
Complex Measuring ◽  
Digital Equipment

Describes a device and methods for automated laser comparator for calibration of digital leveling equipment. The comparator created by the technology of the Finnish Geodetic Institute and placed in the building of the geodetic calibration laboratory of geodetic polygon of FSBE “Centre of geodesy, cartography and SDI”. Shows the main technical characteristics, modes of operation and basic procedures in the calibration of bar-code leveling rods. It is noted that the comparator is a complex measuring system in the form of high-precision optical-electronic stand, consisting of individual mechanical, optical and electronic components and assemblies. One of the features of the design of the comparator is the vertical positioning of its component parts, which allows to determine the error of position of the strokes of the scale of the rod in a working position. Based on the results of verification receive corrections to readings on a rod scale and a linear coefficient of expansion of the material from which rod is made. Lists the possible measurement errors in the verification process and the peculiarities of metrological assurance of operation of the comparator. Formulated one of the immediate tasks in the testing of the comparator

Impact of Human Factors on Measurement Errors

2013 ◽  
pp. 274-291 ◽  
Author(s):  
Vinodkumar Jacob ◽  
M. Bhasi ◽  
R. Gopikakumari
Keyword(s):  
Experimental Study ◽  
Statistical Analysis ◽  
Measurement Error ◽  
Measurement Errors ◽  
Human Error ◽  
Quantitative Comparison ◽  
Measuring System ◽  
Measuring Instrument ◽  
Related Factors ◽  
Human Errors

Measurement is the act or the result, of a quantitative comparison between a given quantity and a quantity of the same kind chosen as a unit. It is for observing and testing scientific and technological investigations and generally agreed that all measurements contain errors. In a measuring system where both a measuring instrument and a human being taking the measurement using a preset process, the measurement error could be due to the instrument, the process or human error. This study is devoted to understanding the human errors in measurement. Work and human involvement related factors that could affect measurement errors have been identified. An experimental study has been conducted using different subjects where the factors were changed one at a time and the measurements made by them recorded. Errors in measurement were then calculated and the data so obtained was subject to statistical analysis to draw conclusions regarding the influence of different factors on human errors in measurement. The findings are presented in the paper.

scholarly journals Performance Assessment of a Renovated Precast Concrete Bridge Using Static and Dynamic Tests

2020 ◽  
Vol 10 (17) ◽  
pp. 5904
Author(s):  
Milan Sokol ◽  
Michal Venglár ◽  
Katarína Lamperová ◽  
Monika Márföldi
Keyword(s):  
Precast Concrete ◽  
Measuring System ◽  
Data Logger ◽  
Global Response ◽  
Traffic Loads ◽  
Dynamic Analyses ◽  
Time Histories ◽  
Load Tests ◽  
Method Model ◽  
Complex Measuring

The article presents the development of a SHM (Structural Health Monitoring) strategy intended to confirm the improvement of the load-bearing capacity of a bridge over the Ružín Dam using static and dynamic load tests, as well as numerical simulations. The paper comprises measurements of the global response of the bridge to prepare a verified and validated FEM (Finite Element Method) model. A complex measuring system used for the tests consisted of two main parts: an interferometric IBIS-S (Image by Interferometric Survey-Structures) radar and a multichannel vibration and strain data logger. Next, structure–vehicle interactions were modelled, and non-linear numerical dynamic analyses were performed. As a result, the time histories of displacements of the structure from traffic effects were obtained. Their comparison with IBIS-S radar records proves that this method can be effectively used for assessing bridges subjected to common traffic loads. The results (measured accelerations) obtained by local tests in external pre-stressed cables are presented and a convenient method for acquiring the axial force in the cables is proposed.

scholarly journals RESEARCH OF EFFICIENCY ECOLOGICAL DIAGNOSTICS SYSTEM OF HEAT ENGINES AND BOILER PLANTS

2019 ◽  
Vol 6 (152) ◽  
pp. 73-78
Author(s):  
A. Polivyanchuk ◽  
M. Smirny ◽  
S. Romanenko ◽  
R. Semenenko ◽  
R. Plotnikova ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Measurement Errors ◽  
Experimental Studies ◽  
Diagnostic System ◽  
Measuring System ◽  
Methodological Error ◽  
Heat Engines ◽  
Accuracy Of Measurements ◽  
Diagnostics System ◽  
The Impact

A universal, multifunctional system of environmental diagnostics of heat engines and boiler plants has been created, which allows one to determine indicators characterizing the chemical and physical effect of these objects on the environment: concentrations, mass, specific and average operational emissions of pollutants, noise, thermal pollution, vibration. This measuring system consists of instrumental, testing, demonstration and laboratory modules, which allows you to use it as a diagnostic tool, training and test bench and laboratory; as well as apply it in various fields: transport, energy, environmental and educational fields. The diagnostic system implements methods for monitoring and improving the accuracy of measurements of average operating emissions of pollutants: method for determining the resulting measurement errors of the average operational emissions of gaseous pollutants and particulate matter – GAS and РT indicators, which allows you to evaluate the impact on the data of the value of the errors of the measuring equipment of the diagnostic system; a method for increasing the accuracy of measurements of the normalized РT index by taking into account the methodological error of measurements of a given value due to the influence of the temperature of the sample in the tunnel on the measured emission of particulate matter - δРТt. Experimental studies of the diagnostic system and methods for increasing its accuracyon full-scale objects were carried out: diesel engines: tractor 4CHN12/14 tractor D65M, diesel locomotive diesel engine DEL-01 and boiler units: gas - DKVR-20/13 and AOGV-100E, solid fuel - KCHM-2M-4. Transport diesels were tested according to the cycles established by the UNECE Regulations R-49, R-96 and the international standard ISO-8178. As a result of tests of these engines, the coefficients KРi, KMgasi and KMрmi were determined, which are used to assess the accuracy of measurements of GAS and РT indicators, the resulting measurement errors of these values were investigated and the range of variation of the methodical error δРТt was determined.

scholarly journals The Solution for the Thermographic Measurement of the Temperature of a Small Object

Sensors ◽  
2021 ◽  
Vol 21 (15) ◽  
pp. 5000
Author(s):  
Arkadiusz Hulewicz ◽  
Krzysztof Dziarski ◽  
Grzegorz Dombek
Keyword(s):  
Temperature Measurement ◽  
Practical Method ◽  
Measuring System ◽  
Small Object ◽  
Electronic Components ◽  
Full Load ◽  
Thermographic Camera ◽  
Electronic Elements ◽  
Thermographic Measurement ◽  
Selection Of

This article describes the measuring system and the influence of selected factors on the accuracy of thermographic temperature measurement using a macrolens. This method enables thermographic measurement of the temperature of a small object with an area of square millimeters as, e.g., electronic elements. Damage to electronic components is often preceded by a rise in temperature, and an effective way to diagnose such components is the use of a thermographic camera. The ability to diagnose a device under full load makes thermography a very practical method that allows us to assess the condition of the device during operation. The accuracy of such a measurement depends on the conditions in which it is carried out. The incorrect selection of at least one parameter compensating the influence of the factor occurring during the measurement may cause the indicated value to differ from the correct value. This paper presents the basic issues linked to thermographic measurements and highlights the sources of errors. A measuring stand which enables the assessment of the influence of selected factors on the accuracy of thermographic measurement of electronic elements with the use of a macrolens is presented.

scholarly journals Methodology for quality products.

2014 ◽  
Vol 2014 (3) ◽  
pp. 35-37
Author(s):  
Алиса Игнашкина ◽  
Alisa Ignashkina
Keyword(s):  
Printed Circuit Board ◽  
Circuit Board ◽  
Measuring System ◽  
Electronic Components ◽  
Printed Circuit ◽  
Measuring Devices ◽  
Triangulation Method ◽  
Schematic Diagrams

This article discusses the triangulation method of measuring and measuring devices based on this method. Structural and schematic diagrams of measuring system developed, electronic components selected and template for making printed circuit board prepared.

A Complex Measuring and Evaluation System for Determination of Forming Limit Diagrams

2008 ◽  
Vol 589 ◽  
pp. 233-238 ◽  
Author(s):  
Péter Kovács ◽  
Miklós Tisza
Keyword(s):  
Numerical Simulations ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Evaluation System ◽  
Measuring System ◽  
Forming Limit ◽  
Forming Limit Curves ◽  
Complex Measuring

Forming limit curves are very important for the prediction of failure during sheet metal forming both in practical forming operations and particularly in numerical simulations. The reliability of numerical simulations in sheet metal forming processes is strongly influenced by the reliability of forming limit curves. Therefore, both the theoretical aspects and the experimental determination of the forming limit curves are challenging problems for scientific researchers and industrial practitioners as well. There are various experimental techniques and mathematical models used to determine the forming limit curves. In spite of the standardization efforts made recently by several institutions world wide, there are still significant differences in determining the forming limit curves. Recently, a new, complex measuring system capable for the automatic determination of FLCs was installed at the Department of Manufacturing Engineering. In this paper, first a short overview will be given on the theoretical background of FLCs, then the application of the complex measuring system will be shown.

scholarly journals Devising a method for measuring the motion parameters of industrial equipment in the quarry using adaptive parameters of a video sequence

2021 ◽  
Vol 6 (9 (114)) ◽  
pp. 32-46
Author(s):  
Yurii Podchashynskyi ◽  
Oksana Luhovykh ◽  
Vitaliy Tsyporenko ◽  
Valentyn Tsyporenko
Keyword(s):  
Measurement Errors ◽  
Video Sequence ◽  
Video Camera ◽  
Exponential Smoothing ◽  
Natural Stone ◽  
Measuring System ◽  
Contactless Measurement ◽  
Adaptive Parameters ◽  
Accuracy Of Measurements ◽  
Motion Parameters

The method and structural scheme of an information-measuring system for determining the parameters of objects' movements (technological equipment in the quarry for extracting block natural stone) have been proposed. A distinctive feature of time video sequences containing images of measured objects is their adaptation and adjustment in accordance with the intensity of movement and accuracy requirements for measurement results. Structural and software-algorithmic methods were also applied for improving the accuracy of measurements of motion parameters, namely: complexation of two measuring channels and exponential smoothing of digital references. One of the measuring channels is based on a digital video camera, the second is based on an accelerometer mounted on an object and two integrators. Exponential smoothing makes it possible to take into consideration the previous countdowns of movement parameters with weight coefficients. That ensures accounting for the existing patterns of movement of the object and reducing the errors when measuring the parameters of movement by (1.4...1.6) times. The resulting solutions have been implemented in the form of an information and measurement system. The technological process of extracting blocks of natural stone in the quarry was experimentally investigated using a diamond-rope installation. Based on the contactless measurement of motion parameters, it is possible to ensure control over this process and improve the quality of blocks made of natural stone. Based on the experimental study of measurement errors, recommendations were given for the selection of adaptive parameters of a video sequence, namely the size of images and the value of the inter-frame interval. In addition, methods for the software-algorithmic processing of measuring information were selected, specifically exponential smoothing and averaging the coordinates of the contour of an object, measured in 30 adjacent lines of the image

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