Сalibration method for a strain-gauge measurement system based on bidirectional rail loading

Kolomeets, Andrey; Sych, T. V.

doi:10.1051/matecconf/201821603005

Cited by 3 publications

(4 citation statements)

References 2 publications

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“…To confirm this, the model size was varied, and the number of ties included in the model was changed from 6 through 14. As seen from Figure 11(a), for a model where twelve (12) ties were attached to the rail, the force measured at the rail-tie interface was greater than a model with only six (6) ties. Models with intermediate number of ties clipped to the rail showed number in between these two extremes.…”

Section: Impact Of Unclipped Tiesmentioning

confidence: 97%

“…Several researchers successfully used and validated this strain gauge-based monitoring system in the field to measure vertical wheel loads applied to the rail. [2][3][4][5][6][7][8][9][10][11][12][13] In 2020, Lima et al 14 used the crib circuit to measure vertical wheel-rail contact forces for assessing the performance of Engineered Interspersed Concrete (EIC) ties. In 2018, Edwards et al 15 performed tests to revise the design load considerations for track components.…”

Section: Introductionmentioning

confidence: 99%

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A study of vertical tie reaction forces in ballasted railroad tracks through field instrumentation and numerical modeling

Rabbi

Bruzek

Sussmann

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part F:

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This manuscript presents findings from an ongoing research study at Oklahoma State University studying different factors that affect vertical tie reaction forces in ballasted railroad tracks. A combined approach involving field instrumentation and numerical modeling has been adopted for this purpose. Measurements of tie reactions can indicate the load distribution patterns and quality of vertical support along a track. Locations where tie support conditions are not adequate can develop geometry defects, ultimately leading to component failure. Three different approaches are adopted in this study to measure the forces being transmitted through the rail-tie interface; this is equal to the tie reaction force. The field instrumentation effort validates an alternative method to measure forces at the rail-tie interface using rail-mounted strain gauges. Results from this approach are compared to two other conventional methods of force measurement, i.e. through the use of load cells (LC), and an instrumented tie plate (ITP). A validated 3-dimensional Finite Element (FE) model is used to support the field-observed trends, and explain any observed discrepancy. Parametric analyses using the FE model identify different factors that can contribute to the rail-tie interaction force, thus affecting the instrumentation results. The strain gauge-based approach, using the concept of differential shear strain measurement, has been established as a suitable method for tie reaction force measurement. Exact measurement of the tie reaction force can be ensured through proper installation of the strain gauges, away from possible boundary effects.

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Section: Impact Of Unclipped Tiesmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

A study of vertical tie reaction forces in ballasted railroad tracks through field instrumentation and numerical modeling

Rabbi

Bruzek

Sussmann

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part F:

View full text Add to dashboard Cite

show abstract

“…These sensors do not require significant modification to track components during the installation process. Over the past few decades, research on strain-gauge-based systems for track response monitoring has been noticeable ( 1 – 33 ). Although the use of strain-gauge-based systems for train-induced wheel-load measurement is relatively common, only a few studies have recently reported the use of these systems for rail–tie interaction force measurement ( 2, 5, 7, 9, 13, 14, 26, 27, 29–33 ).…”

Section: Introductionmentioning

confidence: 99%

“…Finally, no consistent standard/guideline is available governing the installation/calibration of these strain-gauge-based systems. Based on an extensive review of published literature, calibration fixtures used for these systems can be broadly divided into three categories: (1) rectangular fixtures ( 34 ), (2) triangular fixtures ( 2, 7, 13, 23, 26, 28–33, 35 ), (3) direct applications of load against a car-body ( 6 , 15 ). This raises the additional question whether or not the calibration results are affected by the type of calibration fixture used.…”

Section: Introductionmentioning

confidence: 99%

Response of Strain-Gauge-Based Tie Reaction Measurement Circuits under Dynamic Loading and Variable Support Conditions

Rabbi,

Alturk,

Bruzek

et al. 2023

Transportation Research Record: Journal of the Transportation R

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Strain gauges are often used to measure vertical wheel loads in a railroad track. This approach is based on the concept of differential-shear-strain (DSS) measurement: The difference in vertical shear force between two points along a beam equals the magnitude of the resultant of applied vertical forces in between. With a slight modification to the strain-gauge positions and installation of an additional set of strain gauges, this concept can be extended to measure the vertical rail–tie interface reaction forces, thus assessing the tie support conditions. Although the application of DSS measurements for vertical-wheel-load quantification is widely prevalent in the railroad community, the validity of this approach for tie reaction measurement has been relatively unexplored. Conceptually, the approach is similar to the vertical-wheel-load measurement system, with the only difference being the placement of the strain gauges along the rail. Nevertheless, several questions have been raised about how different track and loading configurations can affect the accuracy of such a measurement system. To address some of these concerns and establish this approach as a viable method for tie support condition assessment, a field-validation effort was undertaken. Under the scope of this research effort, the strain-gauge-based DSS measurement system for rail–tie interface reaction-force measurement was evaluated in the field under static as well as dynamic loading. The study showed that the strain-gauge-based measurement approach is as accurate as other conventional methods of tie reaction-force measurement.

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Processing of strain gauge control signals by the Kalman filter

Vyplaven

Kolomeets

Popkov

2021

J. Phys.: Conf. Ser.

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One of the methods for detecting defects in the rolling surface of the wheels of freight cars is to measure the deformations of the rail under the passing train. The method is based on the analysis of a strain gauge signal. The main task of the strain gauge signal analysis is the selection of informative components and the removal (filtering) of interference. The paper presents methods of filtering diagnostic signals of strain gauge control and the selection of informative components. The useful signal component can be used to measure the mass of cars, to determine the dynamic load on the rails and to detect defects in the rolling surface of the wheels. The method of adaptive Kalman filtering and linear convolution are proposed as signal processing tools. Based on these algorithms, a software module based on the.NET Framework has been developed using the C# programming language. The algorithms were tested on the signals received when the train was moving along the active section of the track, with a strain gauge control system located on it. The computational complexity and speed of the algorithms are assessed, and the possibility of their further application in the autonomous mode of the system is investigated. The results show that the use of the Kalman filtering algorithm provides a significant performance advantage over the linear convolution algorithm.

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Сalibration method for a strain-gauge measurement system based on bidirectional rail loading

Cited by 3 publications

References 2 publications

A study of vertical tie reaction forces in ballasted railroad tracks through field instrumentation and numerical modeling

A study of vertical tie reaction forces in ballasted railroad tracks through field instrumentation and numerical modeling

Response of Strain-Gauge-Based Tie Reaction Measurement Circuits under Dynamic Loading and Variable Support Conditions

Processing of strain gauge control signals by the Kalman filter

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