Related Experiment Video
Updated: Aug 5, 2025
08:10
Fabrication and Implementation of a Reference-Free Traction Force Microscopy Platform
Published on: October 6, 2019
6.6K
Digital Fringe Projection-Based Clamping Force Estimation Algorithm for Railway Fasteners.
Zhengji Fan1, Yingping Hong1, Yunfeng Wang1
1School of Instrument and Electronics, North University of China, Taiyuan 030051, China.
Sensors (Basel, Switzerland)
|March 30, 2023
Summary
This study introduces a non-contact system using digital fringe projection to assess railway fastener looseness by measuring 3D topography. The technology accurately estimates tightening torque and clamping force, enhancing railway safety and inspection efficiency.
Area of Science:
- Railway Engineering
- Non-Destructive Testing
- Metrology
Background:
- Railway fastener integrity is crucial for safety.
- Current inspection methods lack non-contact, efficient solutions.
- Need for advanced techniques to assess fastener clamping force and looseness.
Purpose of the Study:
- Develop a non-contact system for railway fastener inspection.
- Utilize digital fringe projection to measure 3D topography.
- Directly estimate tightening torque and bolt clamping force.
Main Methods:
- Digital fringe projection for 3D measurement.
- Point cloud processing: denoising, FPFH, ICP registration.
- Kernel density estimation and ridge regression for force estimation.
Main Results:
- Accurate estimation of tightening torque (RMSE 9.272 N·m).
- Precise measurement of clamping force (RMSE 1.94 kN).
- System demonstrates high precision comparable to manual methods.
Conclusions:
- The developed system offers a precise, non-contact solution for railway fastener assessment.
- Direct estimation of torque and clamping force improves safety evaluations.
- Enhanced inspection efficiency and reliability for railway maintenance.
Keywords:
fastener looseness detectionkernel density estimationnon-contact methodspoint cloud processingrail fastener, railway safety inspectionridge regressionMore Related Videos
Related Concept Videos
01:22Machines: Problem Solving I
373
A toggle clamp is a mechanical device commonly used for holding and clamping objects in various applications, such as woodworking, metalworking, and assembly operations. Consider a toggle clamp subjected to a force of 200 N at the handle. The vertical clamping force can be calculated, provided the dimensions of the toggle clamp are known.
The toggle clamp system is a machine structure consisting of movable, pin-connected multi-force members that form a stabilized system to transmit forces. The...
The toggle clamp system is a machine structure consisting of movable, pin-connected multi-force members that form a stabilized system to transmit forces. The...
373
01:17Frictional Forces on Screws
1.2K
Screws are characterized by a helical ridge known as a thread wrapped around a cylindrical shaft. They are commonly used as fasteners to hold objects together or to transmit power and motion in machines. One type of screw that is particularly useful for transmitting power is the square-threaded screw.
A jack with a square-threaded screw is a mechanical device used to lift heavy loads by applying a force at its handle. When the force is applied, the screw turns, raising the load. The screw can...
A jack with a square-threaded screw is a mechanical device used to lift heavy loads by applying a force at its handle. When the force is applied, the screw turns, raising the load. The screw can...
1.2K
01:24Frames: Problem Solving I
544
Consider a jib crane with an external load suspended from the pulley. The dimensions of the crane members are shown in the figure. A systematic analysis of the frame structure is required to determine the reaction forces at the pin joints, assuming that the pulleys are frictionless.
544
01:28Frictional Forces on Flat Belts
982
Flat belts are commonly used in various industrial applications for transmitting power from one pulley to another. When a flat belt is wrapped around a set of pulleys, it experiences different tensions at the driving pulley ends due to the friction between the belt and pulley surface. When the pulley moves in a counterclockwise direction, the tension T2 on the opposite side of the pulley where the belt is moving away from is higher than the tension T1 on the side where the belt is moving...
982
01:30Principle of Moments: Problem Solving
885
The principle of moments is a fundamental concept in physics and engineering. It refers to the balancing of forces and moments around a point or axis, also known as the pivot. This principle is used in many real-life scenarios, including construction, sports, and daily activities like opening doors and pushing objects.
One such scenario involves a pole placed in a three-dimensional system with a cable attached. When a tension is applied to the cable, the moment about the z-axis passing through...
One such scenario involves a pole placed in a three-dimensional system with a cable attached. When a tension is applied to the cable, the moment about the z-axis passing through...
885
01:30Machines: Problem Solving II
348
Machines are complex structures consisting of movable, pin-connected multi-force members that work together to transmit forces. Consider a lifting tong carrying a 100 kg load. It comprises movable sections DAF and CBG linked together with member AB.
348