scholarly journals Magnetic-Measuring Square in the Measurement of the Circular Curve of Rail Transport Tracks

Sensors ◽  
2020 ◽  
Vol 20 (2) ◽  
pp. 560 ◽  
Author(s):  
Arkadiusz Kampczyk
Keyword(s):  
Operating Mode ◽  
Laser Wavelength ◽  
Rail Transport ◽  
Railway Track ◽  
Actual Condition ◽  
Measuring Device ◽  
Beam Laser ◽  
Magnetic Measuring ◽  
Measurement Results ◽  
Circular Curve

In rail transport, measuring the actual condition of a circular curve of a railway track is a key element of track position monitoring not only during operation but also during final works. Predicting changes in its position in the horizontal plane is one of the most important related scientific issues. This paper presents the results of measurements performed with an innovative measuring device called the Magnetic-Measuring Square (MMS). The aim of the research was to demonstrate the acceptability of using the MMS. Horizontal versines of a rail track curve were measured as three neighboring points on a curve (using the method of lacing/stringlining, also called the three-point or the Hallade method), and the perpendicularity of rail joints and shortenings were measured. The MMS device presented in this article was used to measure versines and differences in rails lengths (rail shortenings in the curve) in the operating mode involving a laser distance meter with a laser beam (laser power P < 1 mW, laser wavelength λ = 635 nm) with a target cross, a camera, and a surveying measuring disk. The measurement results confirmed that it is possible to employ the MMS to monitor the geometry of railway track fragments such as track transition curves and railway track curves in rail transport.

scholarly journals Studying and improving intermediate rail fastening of rail transport

2019 ◽  
Vol 109 ◽  
pp. 00028
Author(s):  
Volodymyr Hovorukha
Keyword(s):  
Rail Transport ◽  
Railway Track ◽  
Small Radius ◽  
Working Capacity ◽  
Operational Parameters ◽  
Transverse Loading ◽  
Topical Problem ◽  
Railroad Transport ◽  
Small Curvature ◽  
Horizontal Loading

Topical problem concerning the improvement of intermediate rail fastening of a railway track of railroad transport as well as industrial and underground rail one has been considered taking into account peculiarities of operation in terms of curved sections of a route with small-radius curvature. Objective of the paper is to improve operational parameters of a railway track with extra small curvature radii in terms of railroad gauge adjustment. Operation of the components of intermediate rail fastening, being subject to intense wear and destruction due to the effect of great transverse and horizontal loading within the curved route sections with small-radius curvature, has been and analysed. Innovative engineering solutions to improve intermediate rail fastening have been proposed. Such peculiarity of the device of intermediate rail fastening provides increased durability and working capacity of rail fastening components in terms of considerable transverse loading within the route sections with small-radius curvature. The obtained results may be applied for underground and industrial rail transport as well as for railroad one.

scholarly journals Modelling of a Power Converter with Multiple Operating Modes

2018 ◽  
Vol 9 (1) ◽  
pp. 7 ◽  
Author(s):  
Wang Feng ◽  
Luo Yutao
Keyword(s):  
Electronic Devices ◽  
Operating Mode ◽  
Power Converter ◽  
Insulated Gate Bipolar Transistor ◽  
Operating Modes ◽  
Ac Power ◽  
Traditional Structure ◽  
Measurement Results ◽  
Power Switches ◽  
Power Inversion

In order to achieve DC voltage matching, on-board charging, and DC/AC power inversion, three independent power converters are often needed in traditional Distributed Power Converter (DPC) systems of electric vehicles (EVs): bidirectional DC/DC (Bi-DC/DC), AC/DC, and DC/AC. The requirement of electronic devices such as power switches, inductors, and capacitors make the converter costly and complicated in structure. In this paper, a power converter with multi-operating mode (PCMM) is presented. The proposed PCMM can work in Bi-DC/DC, AC/DC, and DC/AC modes. The state-space averaging model of PCMM considering resistance of Insulated Gate Bipolar Transistor (IGBT) and the inductor is presented. Based on this model, the transfer function of the system is derived and the controller is designed. The simulation and experimental results show that PCMM can meet the design target and verify the feasibility of the model. The measurement results show that the weight of PCMM proposed in this paper is reduced by 51.2% compared with the traditional structure.

scholarly journals Assessment of Stickiness with Pressure Distribution Sensor Using Offset Magnetic Force

Micromachines ◽  
2019 ◽  
Vol 10 (10) ◽  
pp. 652 ◽  
Author(s):  
Takayuki Kameoka ◽  
Akifumi Takahashi ◽  
Vibol Yem ◽  
Hiroyuki Kajimoto ◽  
Kohei Matsumori ◽  
...  
Keyword(s):  
Virtual Reality ◽  
Pressure Distribution ◽  
Magnetic Force ◽  
Tensile Force ◽  
Human Computer Interactions ◽  
Research Attention ◽  
Measuring Device ◽  
Measurement Results ◽  
The Difference ◽  
Intense Research

The quantification of stickiness experienced upon touching a sticky or adhesive substance has attracted intense research attention, particularly for application to haptics, virtual reality, and human–computer interactions. Here, we develop and evaluate a device that quantifies the feeling of stickiness experienced upon touching an adhesive substance. Keeping in mind that a typical pressure distribution sensor can only measure a pressing force, but not a tensile force, in our setup, we apply an offset pressure to a pressure distribution sensor and measure the tensile force generated by an adhesive substance as the difference from the offset pressure. We propose a method of using a magnetic force to generate the offset pressure and develop a measuring device using a magnet that attracts magnetic pin arrays and pin magnets; the feasibility of the method is verified with a first prototype. We develop a second prototype that overcomes the noise problems of the first, arising from the misalignment of the pins owing to the bending of the magnetic force lines at the sensor edges. We also obtain measurement results for actual samples and standard viscosity liquids. Our findings indicate the feasibility of our setup as a suitable device for measuring stickiness.

scholarly journals Prevention of Economic Losses with the help of the System of Control of Saving and Storing Bulk Cargoes in the Process of Train Movement

2019 ◽  
Vol 67 ◽  
pp. 02008
Author(s):  
Vitalyi Sakhatsky ◽  
Nina Lyubymova ◽  
Vladimir Pusik ◽  
Luydmila Pusik ◽  
Ievhenii Chepusenko
Keyword(s):  
Control System ◽  
Horizontal Plane ◽  
Rail Transport ◽  
Railway Track ◽  
Economic Losses ◽  
Radar Sensor ◽  
Safety Control ◽  
Transport Services

In order to ensure the demand of the market for competitive rail transport services, the structure of automatic safety control for bulk cargo is proposed on the basis of the radar sensor and Wi-Fi technology, which allows to avoid the false alert signal caused by changes in the level of liquid due to various deviations of the railway track from the horizontal plane and to fix leakage of the liquid from damaged tank. The issues of increasing the reliability of the proposed control system are considered.

Study on Continuous Monitoring Glucose Concentration with Terbium Gallium Garnet Crystal

2011 ◽  
Vol 317-319 ◽  
pp. 53-57
Author(s):  
Dong Ming Li ◽  
Shu Hai Jia ◽  
Ji Wang
Keyword(s):  
Correlation Coefficient ◽  
Faraday Rotation ◽  
Glucose Concentration ◽  
Continuous Monitoring ◽  
Closed Loop ◽  
Laser Wavelength ◽  
Garnet Crystal ◽  
Closed Loop System ◽  
Glucose Levels ◽  
Measurement Results

In a continuing effort to develop a noninvasive means of monitoring glucose levels using many methods. In this paper a laser, closed-loop, system was designed and a model was developed to extract the glucose concentration information by Faraday rotation with Terbium Gallium Garnet Crystal(TGG Tb3Ga5O12). The system was tested using various concentrations of glucose. The results show that for a static, non-moving sample, glucose can be predicted. For the physiologic range (0-16mmol/l) for either laser wavelength (523nm or 632.8nm), the Correlation coefficient value (R2) are 09977and 0.9995 respectively. The measurement results of 24 hours show the system with good stability, which error is less than 0.05%.

scholarly journals Az IMEA ADR III kritikus fúziós frekvenciavizsgáló eszközzel végzett mérések reprodukálhatóságának vizsgálata

2016 ◽  
Vol 157 (27) ◽  
pp. 1079-1086
Author(s):  
Orsolya Angeli ◽  
Dániel Sándor Veres ◽  
Zoltán Zsolt Nagy ◽  
Miklós Schneider
Keyword(s):  
Critical Flicker Fusion ◽  
Young Population ◽  
Flicker Fusion Frequency ◽  
Measuring Device ◽  
Fusion Frequency ◽  
Critical Flicker Fusion Frequency ◽  
Measurement Results ◽  
The Mean ◽  
Frequency Threshold ◽  
Flicker Fusion

Introduction: Measurement of central critical flicker-fusion frequency is a common screening test for eye diseases and additionally it can serve as a useful diagnostic test in numerous neurological and internal diseases. The test might also be used for monitoring purposes. Aim: The aim of the authors was to evaluate a digital central critical flicker-fusion frequency measuring device (IMEA ADR III) in 30 young, healthy Hungarian subjects. Method: After a general ophthalmological screening examination, monocular central critical flicker-fusion frequency was measured with four colours. Measurements were carried out on two separate days in three sessions under standardized conditions. Intrasession, intersession and intervisit variabilities, differences in central critical flicker-fusion frequency using the four colours and the effect of certain other influencing factors were determined. Results: There were no statistically significant differences between sessions in the mean and standard deviation of the measurement sets. The central critical flicker-fusion frequency threshold for red colour was significantly lower than for other colours, and the threshold for blue colour was significantly lower than for green. There were no significant differences regarding sex, age, iris colour, and smoking indicating that these factors did not influence the central critical flicker-fusion frequency threshold in these subjects. Conclusions: Measurement results with the device are reliable and reproducible in healthy, young population in separate sessions. Orv. Hetil., 2016, 157(27), 1079–1086.

Segmented γ Scanning Device and its Experimental Research

2018 ◽  
Author(s):  
Su-xia Hou ◽  
Chen Chen ◽  
Quan-hu Zhang ◽  
Xiang-hua Su ◽  
Wen-ming Zuo
Keyword(s):  
Nondestructive Testing ◽  
Experimental Research ◽  
Nuclear Material ◽  
Material Management ◽  
Measuring Device ◽  
Scanning Device ◽  
Uniform Sample ◽  
Measurement Results ◽  
Non Destructive ◽  
Uniform Treatment

Segmented Gamma Scanner (SGS) is a commonly used nondestructive testing (Non-Destructive Assay NDA) method. SGS uses radial rotation, axial segmentation, segmented scanning of the non-uniform sample of the uniform treatment, making it possible to accurately measure the radioactivity on each segment and is currently widely used in the field of nuclear material management. This paper introduces a self-designed SGS measuring device and uses this device to perform a large number of scanning experiments on different measurement objects in the laboratory. It also studied the detection performance, stability and SGS method of different objects the accuracy of the measurement results.

scholarly journals The Manufacturing of Low Temperature Measuring Devices Using a PT-100 Sensor Based on ATmega328 Microcontroller

2020 ◽  
Vol 21 (1) ◽  
pp. 26
Author(s):  
Bhakti Hardian Yusuf ◽  
I Made Satriya Wibawa ◽  
I Ketut Putra
Keyword(s):  
Low Temperature ◽  
Coefficient Of Determination ◽  
Measuring Instruments ◽  
Measured Temperature ◽  
Measuring Instrument ◽  
Reference Measuring ◽  
Measuring Device ◽  
Temperature Measuring ◽  
Measurement Results ◽  
Reference Measuring Instrument

A low temperature measuring device has been successfully developed using a microcontroller-based PT-100 sensor ATmega328. The temperature is measured using a PT-100 sensor, as the main processor using the ATmega 328 microcontroller, and the measured temperature is displayed on a 2x16 LCD. The results of the calibration at a temperature of 77 - 300 K against the reference measuring instrument obtained that, the ratio of the measured temperature between the reference measuring instrument and the measuring instrument made was 0.9893 ± 3.69 K and the coefficient of determination R2 = 0.9987. This indicates that the measurement results of the measuring instruments made have an accuracy level of 98.93% and a precision of 99.87%. Keywords: Low temperature, PT-100 Sensor, ATmega328 Microcontroller, LCD 2x16

Description of Subway DT Series Fastening

2014 ◽  
Vol 644-650 ◽  
pp. 535-538
Author(s):  
Wei Ping Wang ◽  
Dun Jin Cai ◽  
Xu Feng Ma ◽  
Ping Wang
Keyword(s):  
High Speed ◽  
Rail Transport ◽  
Railway Track ◽  
Track Structure ◽  
Large Space ◽  
High Speed Railway ◽  
Urban Rail ◽  
Subway System ◽  
Speed Up ◽  
Rail Structure

In recent decades, with the acceleration of population flowing in China, large and medium-sized cities to speed up the construction of urban rail. Relatively high speed railway, the requirement of the urban rail is relatively low, so it can be designed on the basis of high speed railway track structure for urban rail transport, this gives the designer the design of large space;Each city urban rail structure more or less differences. Especially fastening system is various, even in the same line also exist different fastening systems.Because Chinese fastening system in the subway is various, not a fixed is widely used fastening system;This paper, the DT series fastening in subway system has carried on the simple summary. Make a reference for fastening researchers.

Development of a Novel Gear Measuring Device of High Accuracy

2003 ◽  
Author(s):  
Frank Ha¨rtig ◽  
Christian Keck ◽  
Karin Kniel ◽  
Heinrich Schwenke ◽  
Klaus Wendt ◽  
...  
Keyword(s):  
Manufacturing Industry ◽  
Coordinate Measuring Machine ◽  
Calibration Method ◽  
National Metrology Institute ◽  
Distance Information ◽  
Measuring Device ◽  
Measurement Results ◽  
Gear Manufacturing ◽  
Measuring Machine ◽  
Tracking Interferometer

The German national metrology institute, the Physikalisch-Technische Bundesanstalt (PTB), has developed a novel calibration method for gear artefacts. This reduces the current calibration uncertainty of gear standards, which is an essential step towards meeting the rising quality demands of the gear manufacturing industry. The measurement setup is based on a coordinate measuring machine (CMM) equipped with a high-precision rotary table. The key element of the novel gear measuring device is a tracking interferometer (TI) for reading the distance information. This information is combined with the reading of the coordinate measuring machine line scales in order to reduce the overall measurement uncertainty. If an optimized measurement strategy is applied, the measurement results are almost achieved with laser interferometer accuracy. First simulations and measurement results for an involute profile artefact are presented and discussed.

Sign in / Sign up

Export Citation Format

Share Document