A scheme for online testing of pantograph-catenary contact force

Abstract

The invention provides an online testing scheme of pantograph-catenary contact force. Firstly, an experimental model is established; sensors are arranged at intervals along the Y-axis direction on the bow reed on the back of the pantograph, a clamp is set up on the slide plate and then a weight is hung in the center of the clamp. Record the grating wavelength of each measuring point in real time; obtain the static contact force change rule under different loads during static loading; then arrange the optical fiber strain gauge sensor on the bow reed, and arrange a high-speed camera in front of the pantograph to obtain the static contact force; through The unidirectional acceleration sensor first calculates the inertial force of the pantograph head to calculate its dynamic contact force online. The present invention proposes a scheme of installing a strain sensor at the reed of the bow head, which can not only obtain higher sensitivity, but also avoid the influence of regular replacement of the slide plate. Using the optical digital speckle correlation method, the direct measurement of the contact point position at any time during the loading process can be realized ， Combined with the strain value of the measuring point, the contact force can be directly reversed without simplifying the physical structure of the slide.

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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