Pantograph-catenary contact force on-line test scheme

Abstract

The invention provides a pantograph-catenary contact force on-line test scheme. The pantograph-catenary contact force on-line test scheme comprises the following steps that an experimental model is established; sensors are arranged on a pantograph head reed on the back face of a pantograph at intervals in the Y-axis direction, a clamp is erected on a sliding plate, weights are hung in the center of the clamp, and grating wavelengths of all measuring points are recorded in real time; static contact force change rules under different loads during static loading are obtained; an optical fiber strain gauge sensor is arranged on the pantograph head reed, a high-speed camera is arranged in front of the pantograph, and the static contact force is obtained; and the dynamic contact force of a pantograph head can be calculated on line by firstly calculating the inertia force of the pantograph head through a one-way acceleration sensor. A scheme of installing the strain sensor at the pantograph head reed is provided, higher sensitivity can be obtained, and the influence of periodic replacement of the sliding plate can be avoided. By means of an optical measurement digital speckle correlationmethod, direct measurement of a contact point position at any moment in the loading process can be achieved, the contact force can be directly deduced reversely in combination with strain values of the measuring points, and a sliding plate solid structure does not need to be simplified.

Description

technical field [0001] The invention relates to the field of electric trains, in particular to an online test scheme capable of accurately measuring pantograph-catenary contact force. Background technique [0002] When the train is running at high speed, the pantograph head slide plate is in dynamic contact with the catenary. At this time, when the pantograph acts on the overhead catenary, a vertical pantograph-catenary contact force will be generated. The pantograph-catenary contact force is a direct reflection of the coupling between the panto-catenary and can be used as a direct basis for evaluating the pantograph-catenary flow quality, the wear life of the bow head slide, and diagnosing the local defects of the catenary. Excessive pantograph-catenary contact force will aggravate the mechanical wear of the bow head slide plate, contact wire and other components, and reduce the service life of the pantograph-catenary system; too small contact force will increase the contac...

AI Technical Summary

Problems solved by technology

Therefore, the F c0 The relationship between -x-measurement point strain is different from the actual situation

In addition, due to the continuous wear and tear of high-speed operation, the maximum service mileage of the bow head skateboard is about 200,000 kilometers, and it needs to be replaced regularly

This will lead to the replacement and reinstallation of the strain sensor and its connection line installed at the bow head slide, increasing the cost of line monitoring

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