Related Experiment Video
Updated: Jul 24, 2025

High-speed Particle Image Velocimetry Near Surfaces
Published on: June 24, 2013
A Laser Plane Attitude Evaluation Method for Rail Profile Measurement Sensors
Le Wang1, Hao Wang1, Qiang Han1
1Infrastructure Inspection Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing 100081, China.
This study introduces a new method to evaluate laser plane attitude for accurate rail profile measurement. It quantifies laser coplanarity, improving measurement system calibration and reducing errors.
Area of Science:
- Metrology
- Optical Measurement Systems
- Railway Engineering
Background:
- Non-coplanar lasers in rail profile measurement cause profile distortion and errors.
- Current methods lack quantitative evaluation of laser plane attitude and coplanarity.
Purpose of the Study:
- To propose an effective method for evaluating laser plane attitude and coplanarity in rail profile measurement.
- To address the limitations of existing qualitative and rough assessment techniques.
Main Methods:
- Real-time fitting of laser planes using three planar targets at different heights.
- Development of laser coplanarity evaluation criteria based on fitted plane data.
Main Results:
- Quantified and accurate assessment of laser plane attitude on both sides of the rail.
- Effective determination of laser coplanarity, resolving traditional method limitations.
Conclusions:
- The proposed method provides a reliable foundation for calibration and error correction in rail profile measurement systems.
- Accurate laser plane attitude evaluation is crucial for minimizing measurement distortions and errors.
More Related Videos
11:34Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography
Published on: May 15, 2017
06:55Scanning Light Scattering Profiler SLPS Based Methodology to Quantitatively Evaluate Forward and Backward Light Scattering from Intraocular Lenses
Published on: June 6, 2017
Related Concept Videos
Profile Leveling and Cross Sections
Leveling Equipment
Influence of Earth's Curvature and Atmospheric Refraction on Leveling
Common Leveling Mistakes and Errors