Ground monitoring method for dangerous condition in heavy-load train operation

Abstract

The invention discloses a ground monitoring method for a dangerous condition in heavy-load train operation. The method comprises the following steps of: testing the vertical wheeltrack force and horizontal wheeltrack force on a track test point as well as corresponding time when the train passes by a strain test module; after the modification and filtration of a regulator, converting the verticalwheeltrack force and horizontal wheeltrack force into a digital signal of the track test point by a data acquisition card; converting the digital signal into continuous vertical and horizontal wheeltrack force curves of each point of a wheel set by a data processing system; comparing the vertical wheeltrack force curve with a wheel scratch curve in a database, and judging whether the wheel is scratched as well as the scratched wheel position; performing frequency-domain and time-domain analysis on the horizontal wheeltrack force curve, and judging whether the wheel experiences snakelike instability as well as the instable wheel position; and sending a corresponding warning signal and a corresponding position signal. Through the invention, the dangerous operation conditions of snakelike instability and wheel scratch of the heavy-load train can be reliably identified and monitored in real time, and the wheel set position information in snakelike instability and wheel scratch can be displayed in real time so as to guarantee the safety in train operation.

Description

technical field [0001] The invention relates to a ground monitoring method for a dangerous running state of a heavy-duty train. Background technique [0002] Railway is the main artery of transportation and plays a very important role in the development of national economy. The development of heavy-haul transportation is a basic strategic countermeasure to improve my country's railway transportation capacity, and is an inevitable product of national conditions and road conditions. It can effectively alleviate the contradiction between railway transportation volume and transportation capacity, and has significant social and economic benefits. However, heavy-duty transportation is a major breakthrough to traditional transportation methods, and its safety situation is not optimistic. Serpentine instability (excessive left-right swing) and wheel abrasions of heavy-duty railway vehicles are common. The former will deteriorate the running quality of vehicles and cause Severe acci...

AI Technical Summary

Problems solved by technology

Although the vehicle performance testing system in the United States has played a role in railway safety monitoring, the intermittent test measurement with a test area length of 0.3 meters cannot monitor continuous wheel-rail forces, including continuous lateral and vertical wheel-rail forces, and cannot identify heavy loads. In addition, the line in the installation section is a flat slope, which meets the requirements of the US Federal Railway Administration Standard Level 5 line, which is very strict in accordance with the conditions

During the installation process of the dynamic monitoring system for vehicle operation quality in China, major changes and replacements have to be made to the roadbed, track bed ties and fasteners, etc., resulting in changes in the boundary conditions of the wheel-rail system, and the measurement results are even at this specific boundary. conditions and constraints, it is difficult to reflect the real wheel-rail force. In addition, due to the use of the overall ballast bed structure, the length of the monitoring area of ​​the system is relatively short (the current monitoring area is 4.8 meters long), so that the system cannot realize Identification of bogie or wheel set hunting instability, and the judgment of wheel abrasion is inaccurate

Although the vehicle safety operation detection system adopts the existing line conditions, does not damage the track subgrade, and can truly reflect the actual force of the wheel and rail, but its application meets the condition that the track slope is less than 3‰. In fact, the railway track with a slope exceeding 3‰ is Very common, so the vehicle safety operation detection system has considerable application limitations

[0004] To sum up, none of the existing train condition monitoring systems can meet the application requirements, and have their own application defects and limitations, and there are no reports on monitoring methods for serpentine instability and wheel abrasion status of heavy-duty railway vehicles.

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