scholarly journals A Novel High-speed Dimensional Inspection Method by the Measurement of Characteristic Points Using Bilateral Vibration Touch Probe

2009 ◽  
Vol 45 (3) ◽  
pp. 137-143
Author(s):  
Yoji MASUI ◽  
Takanori MIYOSHI ◽  
Kazuhiko TERASHIMA
Keyword(s):  
High Speed ◽  
Inspection Method ◽  
Dimensional Inspection ◽  
Characteristic Points ◽  
Touch Probe

A Novel High-Speed Dimensional Inspection Method Using Bilateral Vibration Touch Probe

2009 ◽  
Vol 42 (16) ◽  
pp. 287-292
Author(s):  
Yoji Masui ◽  
Takanori Miyoshi ◽  
Kazuhiko Terashima
Keyword(s):  
High Speed ◽  
Inspection Method ◽  
Dimensional Inspection ◽  
Touch Probe

Automatic Ultrasonic Inspection Method of Railway Axle and its Remaining Life Prediction

2011 ◽  
Vol 213 ◽  
pp. 291-296 ◽  
Author(s):  
Hong Wei Hu ◽  
Xiong Bing Li ◽  
Xiang Hong Wang ◽  
Yi Min Shao
Keyword(s):  
High Speed ◽  
Fatigue Cracks ◽  
Ultrasonic Inspection ◽  
Inspection System ◽  
Remaining Life ◽  
High Speed Railway ◽  
Inspection Method ◽  
Spiral Trajectory ◽  
Image Element ◽  
The Matrix

With the high speed railway utilization, the probability of defects or fatigue cracks in railway axles is increased. An automatic ultrasonic inspection system for railway axles is presented. This system uses combined probes and inspects the defects with spiral trajectory along the axis of the axle. Through the matrix representation of C-scan image element, a defect edge extraction method is adopted, with which the defect parameters of crack are obtained automatically. Based on these defect parameters, the stress intensity factor is assessed by svm regression and the method to predict remaining life is proposed.

scholarly journals Computer vision–based automatic rod-insulator defect detection in high-speed railway catenary system

2018 ◽  
Vol 15 (3) ◽  
pp. 172988141877394 ◽  
Author(s):  
Ye Han ◽  
Zhigang Liu ◽  
DJ Lee ◽  
Wenqiang Liu ◽  
Junwen Chen ◽  
...  
Keyword(s):  
Computer Vision ◽  
Defect Detection ◽  
High Speed ◽  
Power Transmission ◽  
Estimation Algorithm ◽  
Inspection System ◽  
High Speed Railway ◽  
Inspection Method ◽  
Railway Systems ◽  
Catenary System

Maintenance of catenary system is a crucial task for the safe operation of high-speed railway systems. Catenary system malfunction could interrupt railway service and threaten public safety. This article presents a computer vision algorithm that is developed to automatically detect the defective rod-insulators in a catenary system to ensure reliable power transmission. Two key challenges in building such a robust inspection system are addressed in this work, the detection of the insulators in the catenary image and the detection of possible defects. A two-step insulator detection method is implemented to detect insulators with different inclination angles in the image. The sub-images containing cantilevers and rods are first extracted from the catenary image. Then, the insulators are detected in the sub-image using deformable part models. A local intensity period estimation algorithm is designed specifically for insulator defect detection. Experimental results show that the proposed method is able to automatically and reliably detect insulator defects including the breakage of the ceramic discs and the foreign objects clamped between two ceramic discs. The performance of this visual inspection method meets the strict requirements for catenary system maintenance.

Study on the measurement speed and signal to noise ratio of multi tone burst wave for high speed non-contact acoustic inspection method

2016 ◽  
Vol 140 (4) ◽  
pp. 3212-3212
Author(s):  
Nobuaki Kosuge ◽  
Tsuneyosi Sugimoto ◽  
Kazuko Sugimoto ◽  
Chitose Kuroda ◽  
Noriyuki Utagawa
Keyword(s):  
High Speed ◽  
Signal To Noise Ratio ◽  
Tone Burst ◽  
Signal To Noise ◽  
Inspection Method ◽  
Noise Ratio ◽  
Acoustic Inspection

Nondestructive Imaging of Materials Microstructures Using X-Ray Tomographic Microscopy

1990 ◽  
Vol 217 ◽  
Author(s):  
J.H. Kinney ◽  
M.C. Nichols ◽  
U. Bonse ◽  
S.R. Stock ◽  
T.M. Breunig ◽  
...  
Keyword(s):  
High Resolution ◽  
Three Dimensional ◽  
Time Dependent ◽  
Materials Processing ◽  
Dependent Data ◽  
Inspection Method ◽  
Dimensional Inspection ◽  
X Ray ◽  
Nondestructive Imaging

ABSTRACTA technique for nondestructively imaging microstructures of materials in situ, especially a technique capable of delineating the time evolution of chemical changes or damage, will greatly benefit studies of materials processing and failure. X-ray tomographic microscopy (XTM) is a high resolution, three-dimensional inspection method which is capable of imaging composite materials microstructures with a resolution of a few micrometers. Because XTM is nondestructive, it will be possible to examine materials under load or during processing, and obtain three-dimensional images of fiber positions, microcracks, and pores. This will allow direct imaging of microstructural evolution, and will provide time-dependent data for comparison to fracture mechanics and processing models.

scholarly journals Determination of boom vibrations of the road header during cutting based on the analysis of images from high-speed cameras

2019 ◽  
Vol 2 (1) ◽  
pp. 37-49
Author(s):  
Piotr Cheluszka ◽  
Rajmund Mann
Keyword(s):  
High Speed ◽  
Time Lapse ◽  
Point Of View ◽  
The Body ◽  
Cutting Process ◽  
Mining Machine ◽  
Experimental Investigations ◽  
Face Surface ◽  
The Road ◽  
Characteristic Points

Abstract Excavation, especially of hard rocks, using boom-type road headers is a source of strong vibrations of the boom in which they are equipped. These vibrations are transferred through construction nodes further to the turntable and the body of the road header. On the one hand, they are of great importance from the point of view of the durability and the reliability of the mining machine. On the other hand, they affect the variability of the parameters at which the process of cutting the heading face surface of a drilled roadway or tunnel is carried out. For the purpose of determining the vibration intensity of the boom of the road header a photogrammetry system based on two high-speed cameras Phantom Miro LC 120 was used. During the experimental investigations of the cutting process of a cement-sand block using the R-130 road header, the boom and turntable movements were recorded. The analysis of the time-lapse pictures of the recorded footage obtained from the high-speed cameras using dedicated TEMA 3D software allowed to determine the spatial trajectory of movement of the boom and the turntable during the cutting of the massive with specified mechanical properties with set values of the parameters of this process. Basing on the time courses of the coordinates of the boom and turntable characteristic points, the courses of the actual boom swinging speed and acceleration components of its vibrations were determined. The intensity of these vibrations was related to the conditions of the cutting process.

Modelling of a Passenger Coach As Elastic Multibody System

1997 ◽  
Author(s):  
Jürgen Haug ◽  
Udo Piram ◽  
Werner Schiehlen ◽  
Thomas Schirle
Keyword(s):  
Reference Frame ◽  
High Speed ◽  
Ride Comfort ◽  
Equations Of Motion ◽  
Elastic Behavior ◽  
Multibody Model ◽  
Elastic Multibody System ◽  
Rigid Body Model ◽  
Characteristic Points ◽  
Invariant Matrices

Abstract In this paper the multibody model of a railroad passenger coach consisting of two rigid bogies and an elastic car body is presented. The elastic body is introduced by a floating reference frame and superimposed elastic deformations linearized with respect to the reference frame. The governing equations of motion are presented in symbolical form, where the time-invariant matrices describing the elastodynamical behavior are computed numerically in a preprocessor. To increase the computational efficiency, condensation techniques are applied and ten modes are chosen to describe the elastic behavior. Simulations of high speed travelling have been carried out with excitation from measured data of a real track. As a measure of ride comfort the acceleration at characteristic points on the coach are computed. Comparison with results obtained using a less sophisticated rigid body model show significant higher accelerations, depending on the position on the coach, too.

Proposal of dimensional inspection method of railway car axle and wheel using visual data

2020 ◽  
Vol 2020.57 (0) ◽  
pp. 55-56
Author(s):  
Takeshi EMOTO ◽  
Yukinori KOBAYASHI ◽  
Takanori EMARU ◽  
Ankit RAVANKAR ◽  
Abhijeet RAVANKAR
Keyword(s):  
Visual Data ◽  
Inspection Method ◽  
Dimensional Inspection

Intelligent Inspection of the High-Speed Train Bogie Flaw Based on Eddy Current

2015 ◽  
Vol 738-739 ◽  
pp. 751-754
Author(s):  
Ji Hui Zhou ◽  
Zhi Yang Liu ◽  
Gang Chen
Keyword(s):  
Eddy Current ◽  
High Speed ◽  
Surface Flaw ◽  
High Speed Train ◽  
Environment Analysis ◽  
Inspection Method ◽  
Eddy Current Effect ◽  
Eddy Current Inspection ◽  
Physical Prototype ◽  
Lift Off

This paper presents a flaw inspection method based on eddy current effect, by comparison of environment analysis and inspection methods for the high-speed train bogie surface flaw. It designed a testing physical prototype and a reasonable control system which was based on eddy current inspection bogie surface flaw, what’s more, it made use of restraining lift-off effect in testing two times, and the result of experiment indicated that method which tested bogie surface flaw was feasible and effective by digital monitor. The method will offer a guarantee for moving of the high-speed train safely and comfortably, and establish a little base to inspect interior flaw and research farther.

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