scholarly journals Tests of Belt Linear Speed for Identification of Frictional Contact Phenomena

Sensors ◽  
2020 ◽  
Vol 20 (20) ◽  
pp. 5816
Author(s):  
Piotr Bortnowski ◽  
Lech Gladysiewicz ◽  
Robert Krol ◽  
Maksymilian Ozdoba
Keyword(s):  
Measuring Equipment ◽  
Frictional Contact ◽  
Driving Forces ◽  
Measurement Methods ◽  
Elastic Deformations ◽  
Belt Speed ◽  
Measuring Devices ◽  
Speed Measurement ◽  
Tensile Forces ◽  
Drive Pulley

In the locations where driving forces are transmitted, the changing tensile forces cause rapid elastic deformations of the belt. The deformation changes the belt speed. Measurement of the belt speed on the friction contact sections is essential to identify elastic slippage. However, the scale of the phenomenon is small, so it is necessary to use precise measuring equipment. The article presents measurements of the linear belt speed with the use of various sensors and measuring devices. A measurement error was determined for each of the presented measurement methods. The method with the highest accuracy was used to identify the elastic slippage on the drive pulley.

scholarly journals Range Automatic Adjusted Current Transformer Primary Winning

2021 ◽  
Vol 12 (3) ◽  
pp. 3142-3147
Author(s):  
Amirov Sultan Fayzullayevich Et.al
Keyword(s):  
Correction Factor ◽  
Driving Forces ◽  
Operating Mode ◽  
Current Transformer ◽  
Measuring Range ◽  
Secondary Current ◽  
Measuring Devices ◽  
The Difference ◽  
Protection And Control ◽  
And Control

The article discusses the issue of introducing a correction factor for protection and control devices, as the value of the secondary current in a certain range of the auto-adjustable current transformer does not correspond to the value of the secondary current in another range determined by the difference of magnetic driving forces generated by the components of the primary current. Alternatively, an algorithm has been developed to account for the measurement error in this condition in an automatic system that controls the operating mode of the current transformer. It was also found that the output data should be transmitted taking into account the correction factor in order to ensure the proper operation of the protection and measuring devices when the current transformer is switched to another measuring range in the measuring range.

On the problems of calibrating Russian measuring devices on the satellites for remote sensing the Earth

2019 ◽  
Vol 948 (6) ◽  
pp. 39-47
Author(s):  
V.F. Chekalin ◽  
A.A. Sukhov
Keyword(s):  
Remote Sensing ◽  
Measuring Equipment ◽  
Remote Sensing Data ◽  
National Standard ◽  
Earth Remote Sensing ◽  
Sensing Data ◽  
Measuring Devices ◽  
The Earth ◽  
Metrological Parameters ◽  
Accuracy And Stability

The article deals with modern photogrammetric production’s problems appearing at processing the Russian Earth remote sensing data. It is found out that todaythe main of them consists in the absence till now of the working system fortransferring linear and angular measures from national standard to the workingmeasuring devices. The necessity of creating a three-staged calibration scheme, which would guarantee the highest accuracy and stability of operating on-board measuring equipment, is justified. In addition, it is noted, that the existing technology of Earth remote sensing data processing does notprovide correct using of calibrated metrological parameters of the measuring equipment. The suggestions for eliminating that imperfection are given. The essence of the flight calibration principle foron-board equipment is formulated. The necessary list of the surveying systems’ metrological parameters and target equipment is defined.

A comparison of pumping speed measurement methods

1974 ◽  
Vol 11 (1) ◽  
pp. 337-339 ◽  
Author(s):  
D. R. Denison ◽  
E. S. McKee
Keyword(s):  
Measurement Methods ◽  
Speed Measurement

scholarly journals Measuring the Performance of Jordanian Islamic Banks

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Yazan Radwan Qasim ◽  
Yazis Mohamad ◽  
Norhazlina Ibrahim
Keyword(s):  
Economic Growth ◽  
Performance Measurement ◽  
Financial Performance ◽  
Banking Sector ◽  
Driving Forces ◽  
Secondary Data ◽  
Measurement Methods ◽  
Measurement Tool ◽  
Islamic Banks ◽  
Performance Measurements

The banking sector is believed to be one of the driving forces of economic growth of many countries. Muslim jurists have realized the need to get the benefit of banking activities that adopts a lawful way with Islamic rule. Jordanian Islamic banks suffer from measure the financial performance using effective measurement tool based on various indicators. The main aim of this research is to analysis and ranks the performance levels of the Jordanian Islamic banks using suitable measurement methods. This study utilizes secondary data to measures the performance of three Jordanian Islamic banks (JIBFI, IIAB, and JDIB) over the period 2010-2013 by integrated tools; FRA, DEA, and MI. The significant results indicate that JDIB recorded the best performance rank based the three measurements tools, followed IIAB, and lowest rank is JIBFI. The contribution of this study is performance measurements of Jordanian Islamic banks based on the combination of FRA, DEA, and MI rather than utilize one measurement tool.Keywords: Jordanian Islamic banks, performance measurement, FRA, DEA, MI.

Equal Precision Rotation Speed Measurement System of Vichicle Transmission

2013 ◽  
Vol 765-767 ◽  
pp. 2153-2158
Author(s):  
Hong Tao Li
Keyword(s):  
Measurement System ◽  
Precision Measurement ◽  
Measurement Accuracy ◽  
Rotation Speed ◽  
Measurement Methods ◽  
Control Technology ◽  
Electronic Control ◽  
Power Train ◽  
Speed Measurement ◽  
Wide Range

The rev of vehicle transmission is an important parameter to reflect the performance of the power train, and the measurement accuracy will have an influence on the implement of electronic control technology in transmission system. Based on the analysis of common rev measurement methods, aiming at the feature of wide range of rev during HMCVT test, a method of rev equal precision measurement is been put forward.

AN OVERVIEW OF IMPORTANT FACTORS TO CONSIDER WHEN CALIBRATING LEDS IN PHOTOMETRY WITH DIFFERENT DETECTORS

2021 ◽  
Author(s):  
T. Gerloff ◽  
L. Ulm ◽  
P. Sperfeld ◽  
A. Sperling
Keyword(s):  
Measuring Equipment ◽  
Imaging Systems ◽  
Fluorescent Light ◽  
Measuring Instruments ◽  
Light Sources ◽  
White Leds ◽  
Advantages And Disadvantages ◽  
Measuring Devices ◽  
Double Monochromator ◽  
Physical Quantities

LED-based lighting products are the fastest developing light sources on the general lighting market. These include not only white light sources, but also coloured light sources. SI-traceable calibrations with a low measurement uncertainty are challenging because their unique spectral and geometric properties must be taken into account. The requirements on the measuring equipment and resulting uncertainty contributions differ significantly from those for the calibration of conventional incandescent or fluorescent light sources. Furthermore, different detector types can be used when calibrating LEDs. These include classic photometers, radiometers, spectroradiometers but also imaging systems such as ILMDs. Each of these measuring devices has its specific advantages and disadvantages. In this paper, traceable calibrations on 9 coloured and 9 white LEDs are discussed. Various array spectroradiometers, photometers, radiometers and a double monochromator were used for this purpose. Each of these measuring instruments is discussed in terms of its suitability for measuring different physical quantities (e.g. array spectrometer for measuring illuminance).

POWDER GASES MAXIMAL PRESSURE MEASUREMENT METHODS USED AT FIRING ON TESTING STAND FOR LEOPARD 2A4 TANK 120 MM GUN

2019 ◽  
Vol 149 (1) ◽  
pp. 85-98
Author(s):  
Piotr Bieniek ◽  
Janusz Weiss
Keyword(s):  
Measuring Equipment ◽  
Piezoelectric Sensor ◽  
Technical Condition ◽  
Measurement Methods ◽  
Maximum Pressure ◽  
Test Results ◽  
Factors Affecting ◽  
Testing Stand ◽  
Maximal Pressure ◽  
Accuracy Of Measurement

The paper describes a question of measuring the maximum pressure of powder gases in the barrel of 120 mm L44 Leopard 2A4 tank gun in the Institute’s testing position which, in opposite to the thank, deploys two independent methods of simultaneous measurement. The paper compares the measurement methods, the first based on placement of crushing devices directly inside the tested cartridge, and the second on deployment of a piezoelectric sensor assembled into a specially made seat in the gun’s cartridge chamber. Preparation of testing equipment and permanent monitoring of its technical condition to secure the accuracy of measurement of maximum pressure for powder gases is described. Aggregated test results of 120 mm ammunition are used to compare the deployed methods regarding (among others) the repeatability of results, reliability of the measuring equipment, and the time needed to its preparation and to the measurement at the gun site. Recommending of only one from described methods for the application may be difficult as there are many factors affecting the measurement of the maximal pressure of powder gases in the barrel bore.

Comparison of Automated Concrete Shrinkage Measurement Methods

2018 ◽  
Vol 276 ◽  
pp. 229-235 ◽  
Author(s):  
Lucia Osuská ◽  
Petr Novosad ◽  
Martin Labaj
Keyword(s):  
Autogenous Shrinkage ◽  
Measurement Methods ◽  
Point Of View ◽  
Measuring Device ◽  
Concrete Shrinkage ◽  
Measuring Devices ◽  
Eurocode 2 ◽  
Deformation Properties ◽  
Internal Forces

Volumetric changes are deformation properties of concrete that are caused by external or internal forces and can be reversible or irreversible. Relatively significant and irreversible volumetric changes occur during the hydration of clinker minerals during the first stages concrete setting and hardening. From the “real-world” point of view, the volumetric changes associated with drying are the most important – these take place when the leftover mixing water evaporates. The current legislation addresses the volumetric changes of concrete relatively briefly and the calculations of the assumed autogenous shrinkage according to Eurocode 2 are generally related only to the concrete’s strength class, not to the composition of the concrete mixture. The principle of determination of volumetric changes is classified by the standard ČSN 73 1320, which requires the measuring devices with an accuracy of at least 1∙10-5of expected proportional deformation. In this experiment, the volumetric changes of the concrete will be monitored by two different measurement methods. Several different test mixtures will be prepared to monitor these changes continuously with an automatic measuring device. In one case, the measurement will take place from the point of fresh concrete and, in the case of the others, immediately after the acquisition of the handling strength, i.e. from the age of 1 day.

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