US 8,078,025 B2 · Vehicle dynamic measurement device and method for comprehensive parameters of rail wear

Abstract

The invention discloses a vehicle dynamic measurement device for comprehensive parameters of rail wear, which comprises a vision sensor, a computer and a milometer. A high-speed image acquisition card and a measurement module are installed in the computer. The vision sensor comprises imaging system for rail cross-section and a raster projector which can project more than one light plane perpendicular to the measured rail. The measurement module is used for calculating vertical wear, horizontal wear, the amplitude and wavelength of corrugation wear. The invention also discloses a vehicle dynamic measurement method for comprehensive parameters of rail wear. The invention can increase the sampling rate of image sensing and acquisition hardware equipment with no need of improving the performance of it, thereby satisfy high-speed on-line dynamic measurement requirements for corrugation wear, and the amplitude and wavelength of corrugation wear can be calculated more precisely.

Claims19

Dependent claims

A vehicle dynamic measurement device for comprehensive parameters of rail wear, comprising:

a vision sensor including an imaging system for rail cross-section;
a computer having a high-speed image acquisition card and a measurement module installed in it, said high-speed image acquisition card communicatively coupled with the vision sensor, said measurement module being communicatively coupled with the high-speed image acquisition card and used for calculating vertical wear, horizontal wear, the amplitude and wavelength of corrugation wear;
and
a milometer communicatively coupled with the computer;
wherein said vision sensor further includes a raster projector which is used for projecting more than one light plane perpendicular to the measured rail, each light plane intersecting with a measured rail to form a rail cross-section feature profile;
said imaging system for rail cross-section used for obtaining an image including several rail cross-section feature profiles.

3 more elements

A vehicle dynamic measurement method for comprehensive parameters of rail wear, comprising:

A. acquiring an image including several rail cross-section feature profiles and transmitting the acquired image and its corresponding mileage data into a computer;
B. acquiring the 3D profiles of each rail cross-section according to rail cross-section feature profiles in the image and the vision measurement model with structured-light, and obtaining the vertical wear and horizontal wear by comparing measurement profile with standard profile;
said vision measurement model with structured-light comprising camera imaging model, camera parameters and structured-light equations;
and
C. calculating the amplitude and wavelength of corrugation wear based on the obtained vertical wear and its corresponding mileage, and outputting the calculated amplitude and wavelength of corrugation wear to a user.

2 more elements

Dependencies are inferred from the claim text.

Vehicle dynamic measurement device and method for comprehensive parameters of rail wear

Life of this patent

Vehicle dynamic measurement device and method for comprehensive parameters of rail wear

Life of this patent

Abstract

Claims19