METHOD AND APPARATUS FOR DETERMINING MAINTENANCE SECTIONS OF A RAIL

• US 20140095113A1
• Filed: 09/19/2013
• Published: 04/03/2014
• Est. Priority Date: 09/29/2012
• Status: Abandoned Application

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Duan, Ning, Hu, Ke, Li, Li, Wang, Zhi Hu, Zhang, Xin, Cao, Shu Xia
• Application Number:
  US14/031,127
• Publication Number:
  US 20140095113A1
• Time in Patent Office: Days
• US Class Current: 702/184
• CPC Class Codes: B61L 15/0062 On-board target speed calculation or supervision
• CPC Class Codes: B61L 23/042 Track changes detection
• CPC Class Codes: E01B 35/00 Applications of measuring apparatus or devices for track-building purposes apparatus on locomotives or cars to indicate or record bad track sections B61K9/00; measuring angles, linear dimensions, or irregularities in general G01B, G01C
• CPC Class Codes: G01M 99/00 Subject matter not provided for in other groups of this subclass

Abstract

A method of determining maintenance sections of a rail includes partitioning the rail into a plurality of sections based on railway topographical information and track defect information; identifying, from the plurality of sections, sections whose sectional speed limits are lower than a recommended running speed; and determining, from the identified sections, sections which need maintenance.

Claims

1. A method of determining maintenance sections of a rail, the method comprising:

partitioning, with a processing device, the rail into a plurality of sections based on railway topographical information and track defect information;

identifying, from the plurality of sections, sections whose sectional speed limits are lower than a recommended running speed; and

determining, from the identified sections, sections which need maintenance.

2. The method according to claim 1, wherein the partitioning the rail into a plurality of sections based on railway topographical information and track defect information comprises:

determining a density curve of a speed-affecting points of the rail, the speed-affecting points being determined based on the railway topographical information and the track defect information; and

partitioning the sections based on a slope change of the density curve being greater than a predetermined numerical value.

3. The method according to claim 2, wherein determining a density curve of speed-affecting points of the rail comprises:

determining a location of each track defect and a speed-affecting weight of the track defect based on the track defect information, wherein the speed-affecting weight of the track defect is determined based on the type and the speed-affecting degree of the track defect;

determining a location of each topography and a speed-affecting weight of the topography based on the topological information, wherein the speed-affecting weight of the topography is determined based on the type and the speed-affecting degree of the topography;

determining a set of the speed-affecting points by synthesizing the topography as well as the location and weight of the track defect; and

determining the density curve based on the set of speed-affecting points.

4. The method according to claim 3, wherein:

the determining the density curve based on the set of speed-affecting points comprises using a CUSUM curve of the set of speed-affecting points of the rail as the density curve; and

the partitioning the sections based on a slope change of the density curve being greater than a predetermined numerical value comprises;

for the CUSUM curve, taking a point whose slop change ratio is greater than the predetermined numerical value as a partitioning point to partition the sections.

5. The method according to claim 1, wherein the sections which need maintenance are all sections whose speed limits are lower than the recommended running speed.

6. The method according to claim 1, wherein the determining sections, which need maintenance, among the identified sections comprises:

determining a maintenance cost model for a section whose sectional speed limit is lower than the recommended running speed;

determining a speed smoothing model that lowers a speed difference between neighboring sections after maintenance; and

determining a priority and maintenance degree of the maintenance section based on the maintenance cost model and the speed smoothing model.

7. The method according to claim 6, wherein the maintenance cost model is determined based on a product of a sectional length, a maintenance improvement amplitude, and a unit maintenance cost.

8. The method according to claim 6, wherein the determining a speed smoothing model which lowers the speed difference between neighboring sections after maintenance comprises:

determining a smoothing state after maintenance by dividing the quadratic sum of the speed difference between a speed of this section and a speed of an immediately preceding section and the speed difference between the speed of this section and a speed of an immediately following section by the sectional length.

9. An apparatus for determining maintenance sections of a rail, apparatus comprising:

a partitioning module configured to partition the rail into a plurality of sections based on railway topographical information and track defect information;

an identifying module configured to identify, from the plurality of sections, sections whose sectional speed limits are lower than a recommended running speed; and

a determining module configured to determine, from the identified sections, sections which need maintenance.

10. The apparatus according to claim 9, wherein the partitioning module comprises:

a module configured to determine a density curve of speed-affecting points of the rail, the speed-affecting points being determined based on the railway topographical information and the track defect information; and

a module configured to partition the sections based on a slope change of the density curve being greater than a predetermined numerical value.

11. The apparatus according to claim 9, wherein the module configured to determine a density curve of speed-affecting points of the rail comprises:

a module configured to determine a location of each track defect and a speed-affecting weight of the track defect based on the track defect information, wherein the speed-affecting weight of the track defect is determined based on the type and the speed-affecting degree of the track defect;

a module configured to determine a location of each topography and a speed-affecting weight of the topography based on the topological information, wherein the speed-affecting weight of the topography is determined based on the type and the speed-affecting degree of the topography;

a module configured to determine a set of the speed-affecting points by synthesizing the topography as well as the location and weight of the track defect; and

a module configured to determine the density curve based on the set of speed-affecting points.

12. The apparatus according to claim 10, wherein:

the module configured to determine the density curve of speed-affecting points of the rail uses a CUSUM curve of the set of speed-affecting points of the rail as the density curve; and

wherein the module configured to partition the sections based on a slope change of the density curve being greater than a predetermined numerical value comprises;

a module configured to, for the CUSUM curve, take a point whose slop change ratio is greater than the predetermined numerical value as a partitioning point to partition the sections.

13. The apparatus according to claim 9, wherein the sections which need maintenance are all sections whose speed limits are lower than a recommended running speed.

14. The apparatus according to claim 9, wherein the determining module comprises:

a module configured to determine a maintenance cost model for a section whose sectional speed limit is lower than the recommended running speed;

a module configured to determine a speed smoothing model that lowers a speed difference between neighboring sections after maintenance; and

a module configured to determine a priority and a maintenance degree of the maintenance section based on the maintenance cost model and the speed smoothing model.

15. The apparatus according to claim 14, wherein the maintenance cost model is determined based on a product of a sectional length, a maintenance improvement amplitude, and a unit maintenance cost.

16. The apparatus according to claim 14, wherein the module configured to determine a speed smoothing model which lowers the speed difference between neighboring sections after maintenance comprises:

a module configured to determine a smoothing state after maintenance by dividing the quadratic sum of the speed difference between a speed of this section and a speed of an immediately preceding section and the speed difference between the speed of this section and a speed of an immediately following section by the sectional length.