Non-contact rail track parameter measurement

2015 ◽  
Author(s):  
Vibin N Valsan ◽  
C.Y Patil ◽  
J.M Patekari
Keyword(s):  
Parameter Measurement ◽  
Rail Track ◽  
Track Parameter

scholarly journals Real-Time Geometric Parameter Measurement of High-Speed Railway Fastener Based on Point Cloud from Structured Light Sensors

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3675 ◽  
Author(s):  
Hao Cui ◽  
Qingwu Hu ◽  
Qingzhou Mao
Keyword(s):  
Real Time ◽  
Geometric Parameter ◽  
Point Cloud ◽  
High Speed ◽  
Region Growing ◽  
Point Clouds ◽  
Parameter Measurement ◽  
High Speed Railway ◽  
Rail Track ◽  
Accuracy And Repeatability

With the increase in the number of service years for high-speed railways, the foundation of the rail track suffers from settlement, which causes rail track irregularity. To adjust the position of the track and meet track regularity demands, several components of the fastening system will be replaced by different sized components. It is important to measure the exact geometric parameters for the components of a fastening system before adjusting the track. Currently, the measurement process is conducted manually, which is laborious and error-prone. In this paper, a real-time geometric parameter measurement system for high-speed railway fastener based on 2-D laser profilers is presented. Dense and precise 3-D point clouds of high-speed railway fasteners are obtained from the system. A fastener extraction method is presented to extract fastener point cloud and a region-growing algorithm is used to locate key components of the fastener. Then, the geometric parameter of the fastener is worked out. An experiment was conducted on a high-speed railway near Wuhan, China to verify the accuracy and repeatability of the system. The maximum root-mean-square-error between the manual measurement and the system measurement is 0.3 mm, which demonstrates adequate accuracy. This system can replace manual measurements and greatly improve the efficiency of geometric parameter measurements for fasteners.

Aerodynamic parameter measurement using the wind driven manipulator - Inverse force measurement on wings

1997 ◽  
Author(s):  
Richard Ames ◽  
Richard Ames ◽  
N. Komerath ◽  
J. Magill ◽  
N. Komerath ◽  
...  
Keyword(s):  
Force Measurement ◽  
Parameter Measurement ◽  
Aerodynamic Parameter ◽  
Inverse Force

Effect of the Rail Track on Dynamic Behavior of the Base-Isolated Railway Bridges

2005 ◽  
Vol 90 (12) ◽  
pp. 25-32 ◽  
Author(s):  
Akihiro Toyooka ◽  
Manabu Ikeda ◽  
Hirokazu Iemura ◽  
Kiyomitsu Murata ◽  
Atsushi Ichikawa
Keyword(s):  
Dynamic Behavior ◽  
Railway Bridges ◽  
Rail Track

Fair Value Measurement and Mandated Accounting Changes: The Case of the Victorian Rail Track Corporation

2017 ◽  
Vol 28 (2) ◽  
pp. 266-278 ◽  
Author(s):  
Malcolm Abbott ◽  
Angela Tan-Kantor
Keyword(s):  
Fair Value ◽  
Rail Track ◽  
Fair Value Measurement ◽  
Accounting Changes ◽  
Value Measurement

An Improved Airborne Single Observer Passive Location

2012 ◽  
Vol 157-158 ◽  
pp. 1533-1536
Author(s):  
Yong Wang ◽  
Chang Qiang Huang ◽  
Zheng Wang ◽  
Wang Xi Li
Keyword(s):  
Angular Velocity ◽  
Phase Difference ◽  
Measurement Problem ◽  
Doppler Frequency ◽  
Original Method ◽  
Parameter Measurement ◽  
Frequency Change ◽  
Passive Location ◽  
Change Rate ◽  
Domain Information

Using phase difference change rate’s augmentation to angular velocity, an improved passive location is developed,which solves the high precision parameter measurement problem of angular velocity in passive location and tracking via spatial-frequency domain information. The simulation shows that this method can reduce the difficulties of parameter measurement. The ranging error is mainly affected by the measurement error of phase difference change rate and doppler frequency change rate. Compared with the original method, it has higher passive location precision.

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