Lessons from two field tests on pipeline damage detection using acceleration measurement

2011 ◽  
Author(s):  
Masanobu Shinozuka ◽  
Sungchil Lee ◽  
Sehwan Kim ◽  
Pai H. Chou
Keyword(s):  
Damage Detection ◽  
Field Tests ◽  
Acceleration Measurement

Hoist Positioning System Based on the Acceleration Sensor

2013 ◽  
Vol 273 ◽  
pp. 542-546
Author(s):  
Fu Zhong Wang ◽  
Fu Kai Zhang ◽  
Li Min Zhang
Keyword(s):  
Circuit Design ◽  
Measurement Accuracy ◽  
Field Tests ◽  
Signal Interference ◽  
Acceleration Sensor ◽  
Acceleration Measurement ◽  
Acceleration Signal ◽  
Calculation Results ◽  
Composite Filter ◽  
Hardware Circuit

A displacement measurement based on the acceleration sensor, the acceleration signal detection, conditioning hardware circuit design and displacement calculation; Due to signal interference in the measurement process, in order to improve the measurement accuracy of the acceleration signal, a composite filter, and completed the programming of the MSP430 microcontroller, field tests showed that the displacement calculation results obtained on the basis of the acceleration measurement to fully meet the accuracy requirements of field measurement.

scholarly journals THE FOURTH CENTRAL MOMENT TO ANALYZE THE ACCELERATIONS OF THE AXLE BEARINGS OF ROLLING STOCK

2015 ◽  
Vol 2 (158) ◽  
Author(s):  
Vassyl Ravlyuk ◽  
Mykola Ravlyuk ◽  
Mykola Cherniienko ◽  
Oleksandr Chepurnov
Keyword(s):  
Data Analysis ◽  
Damage Detection ◽  
Field Tests ◽  
Rolling Bearing ◽  
Central Moment ◽  
Vibration Characteristics ◽  
Rolling Stock ◽  
Kurtosis Parameter ◽  
Extent Of Damage ◽  
Past State

The article is devoted to the vibration characteristics of one element, namely the rolling bearing andmethod, which is based on both bench and field tests and proven to be effective to identify items of axlebearing. The method is based on static kurtosis parameter, which remains constant for good bearing,irrespective of load and speed, but changes with the development of damage. The extent of damage can beestimated from the distribution of this parameter in the selected frequency intervals. Thus, the evaluation ofbearing condition can be conducted with minimal use of information about its past state. Most other methodsused to detect damage in a significant advantage of the data analysis, so this method could be a significantachievement in the field of detection of defects in the bearings or at least will allow you to create simple andcheap method. Like most other simple methods of damage detection, this method does not allow to defineprecisely the nature of the defect and to obtain such information it is necessary to use more sophisticateddiagnostic methods.

scholarly journals Study of Rail Squat Characteristics through Analysis of Train Axle Box Acceleration Frequency

2021 ◽  
Vol 11 (15) ◽  
pp. 7022
Author(s):  
Hojin Cho ◽  
Jaehak Park
Keyword(s):  
Surface Defects ◽  
Field Tests ◽  
Wavelet Spectrum ◽  
Measured Data ◽  
Acceleration Measurement ◽  
Field Verification ◽  
Matlab Program ◽  
General Line ◽  
Joint Section ◽  
Prototype Design

In this study, a method for detecting the railway surface defects called “squats” using the ABA (Axle Box Acceleration) measurement of trains was proposed. ABA prototype design, implementation, and field tests were conducted to derive and verify the results. The field test was performed using a proven precision measurement system, and the measured data were signal-processed using a Matlab program. The algorithm used to determine the position of the squats was developed based on wavelet spectrum analysis. This study was verified for a section of a domestic general line and, following field verification for the section, squats was detected with a hit rate of about 88.2%. The main locations where the squats occurred were the rail welds and the joint section, and it was confirmed that in some sections, unsupported sleepers occurred at the locations where the squats occurred.

State special primary acceleration measurement standard for gravimetry GET 190-2019

2020 ◽  
pp. 3-8
Author(s):  
L.F. Vitushkin ◽  
F.F. Karpeshin ◽  
E.P. Krivtsov ◽  
P.P. Krolitsky ◽  
V.V. Nalivaev ◽  
...  
Keyword(s):  
High Precision ◽  
Free Fall ◽  
Measurement Range ◽  
Measurement Standard ◽  
Acceleration Measurement ◽  
Measurement Systems ◽  
Free Fall Acceleration ◽  
Investigation Methods ◽  
Measurement Results ◽  
Upper Level

The State special primary acceleration measurement standard for gravimetry (GET 190-2019), its composition, principle of operation and basic metrological characteristics are presented. This standard is on the upper level of reference for free-fall acceleration measurements. Its accuracy and reliability were improved as a result of optimisation of the adjustment procedures for measurement systems and its integration within the upgraded systems, units and modern hardware components. A special attention was given to adjusting the corrections applied to measurement results with respect to procedural, physical and technical limitations. The used investigation methods made it possibled to confirm the measurement range of GET 190-2019 and to determine the contributions of main sources of errors and the total value of these errors. The measurement characteristics and GET 90-2019 were confirmed by the results obtained from measurements of the absolute value of the free fall acceleration at the gravimetrical site “Lomonosov-1” and by their collation with the data of different dates obtained from measurements by high-precision foreign and domestic gravimeters. Topicality of such measurements ensues from the requirements to handle the applied problems that need data on parameters of the Earth gravitational field, to be adequately faced. Geophysics and navigation are the main fields of application for high-precision measurements in this field.

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