Fault diagnosis apparatus for brake of train and automatic train operation equipment due to the reduction braking performance using the same and fault diagnosis method for brake of train

• US 10,180,369 B2
• Filed: 12/29/2016
• Issued: 01/15/2019
• Est. Priority Date: 03/25/2016
• Status: Active Grant

• Current Assignee: LSIS Co. Ltd. (LS Corporation)
• Original Assignee: LSIS Co. Ltd. (LS Corporation)
• Inventors: Jung, Jong-Chul, Cho, Yong-Gee
• Primary Examiner(s): Badii, Behrang
• Assistant Examiner(s): GREENE, DANIEL LAWSON
• Application Number:
  US15/393,992
• Publication Number:
  US 20170278319A1
• Time in Patent Office: 747 Days
• CPC Class Codes: B61L 15/0081 On-board diagnosis or maintenance
• CPC Class Codes: B61L 23/02 for indicating along the route the failure of brakes
• CPC Class Codes: B61L 25/021 Measuring and recording of train speed
• CPC Class Codes: G01L 5/286 Measuring deceleration
• CPC Class Codes: G01M 17/08 Railway vehicles

Abstract

The present invention relates to a fault diagnosis apparatus for a brake of a train, an automatic train operation system operated due to degradation of braking performance using the same, and a fault diagnosis method for the brake of the train. In particular, the present invention is directed to determining that a fault has occurred in the brake when the difference between the current acceleration of the train and the required acceleration is greater than or equal to a reference value and safely moving the train to a stopping point through a powering operation or coasting operation such that emergency braking is not applied by an automatic train protection (ATP) system if the fault has occurred in the brake. When a fault occurs in the brake of the train, the train is automatically operated such that emergency braking is not triggered by an ATP system.

Claims

1. An automatic train operation system operated due to braking performance degradation, comprising:

a brake fault diagnosis unit to diagnose a fault status of a brake of a train;

a travel speed profile generator configured to generate, when a fault occurs in the brake of the train, a degraded mode travel speed profile such that the train moves to a stopping point at a speed within a speed limit through a powering operation or a coasting operation; and

a travel speed controller configured to control a travel speed of the train according to the travel speed profile,

wherein the degraded mode travel speed profile comprises;

a powering profile for powering the train up to a degraded mode speed limit, the degraded mode speed limit being lower than the speed limit;

a constant speed profile for repeating the powering operation and the coasting operation to maintain the train at the degraded mode speed limit; and

a coasting profile for stopping the train at a stopping point through the coasting operation.

2. The automatic train operation system according to claim 1, wherein the brake fault diagnosis unit comprises:

a required braking force calculator configured to calculate expected required braking force of the train based on the current speed information about the train and braking notch information;

a current acceleration calculator configured to calculate a current acceleration based on the current speed information and previous speed information about the train;

a train model unit configured to calculate a required acceleration based on the current speed information about the train, the required braking force, railroad curvature information and railroad gradient information; and

a brake performance monitoring unit configured to determine that a fault has occurred in the brake of the train when a difference between the current acceleration and the required acceleration is greater than or equal to a reference value.