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Vehicle derailing early warning method based on steel rail deformation / stress parameters

A stress parameter, rail technology, applied in the direction of railway signal and safety, can solve the problem of no vehicle derailment coefficient and load reduction rate measurement

Inactive Publication Date: 2009-03-04
BEIJING JIAXUN FEIHONG ELECTRIC CO LTD
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Problems solved by technology

[0006] Measuring vehicle derailment coefficient, load reduction rate and wheel scar through rail stress and shape change Although it is feasible in principle, and the deformation law of rail is also very clear, rail deformation measurement has been only used in rail manufacturing and maintenance, and to establish wheel-rail Force model, there is currently no specific method for measuring the derailment coefficient and load reduction rate of vehicles based on rail stress and shape changes

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  • Vehicle derailing early warning method based on steel rail deformation / stress parameters
  • Vehicle derailing early warning method based on steel rail deformation / stress parameters
  • Vehicle derailing early warning method based on steel rail deformation / stress parameters

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Embodiment Construction

[0035] The invention calculates the lateral and vertical stresses of the rails by measuring the dynamic shape changes of the rails under the action of the gravity of the train wheels, thereby obtaining key driving safety parameters such as derailment coefficient, load shedding rate, and wheel scars. By utilizing these key driving safety parameters, the vehicle derailment warning method provided by the present invention can be realized. Next, the specific process of obtaining parameters such as derailment coefficient, load reduction rate and wheel scar through rail deformation parameters will be described in detail.

[0036] Firstly, the specific process of calculating the derailment coefficient is introduced. The ratio Q / P of the vertical support force P of the rail to the wheel and the force Q horizontally to the inner side of the wheel (between the two wheels) is called the derailment coefficient. After years of research in the railway industry, the derailment coefficient i...

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Abstract

The invention provides an early-warning method for vehicle derailment based on steel-rail deformation or stress parameters. The method comprises the following steps: (1) collecting the metrical data of a sensor; (2) generating an event when the vehicle passes the early-warning test point on the basis of the axle-number information of a train and the metrical data of the sensor, and starting an early-warning process for derailment; (3) obtaining the coefficient of vehicle derailment, the data of load reduction rate and the date of scar early-warning by the steel-rail deformation or the stress parameters; (4) estimating the train derailment tendency according to the coefficient of vehicle derailment , the data of load reduction rate and the data of scar early-warning; and (5) determining whether an early-warning operation for the vehicle derailment is carried out according to the estimating results. The invention can be utilized to integrate the monitoring of various traveling safety parameters into one system, thereby avoiding the complexity of a related monitoring system.

Description

technical field [0001] The invention relates to a vehicle derailment early warning method for a rail transit system, in particular to a rail transit vehicle derailment early warning method based on rail deformation / stress parameters, and belongs to the technical field of train operation monitoring. Background technique [0002] In the rail transit system, derailment coefficient and load shedding rate are important parameters to ensure the safe operation of trains. In the prior art, the measurement of the derailment coefficient and load shedding rate generally uses a ground-framed measurement bed or a vehicle-mounted measurement system. There are certain usage defects in these devices. For example, the structure of the ground frame-type measuring bed is relatively complicated, and the connection method between the ballast bed and the track needs to be changed, the installation process is complicated, and the maintenance is difficult; while the vehicle-mounted measuring syste...

Claims

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Application Information

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IPC IPC(8): B61L23/00
Inventor 吕志东辛斌袁军国李明华
Owner BEIJING JIAXUN FEIHONG ELECTRIC CO LTD
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