Pantograph-catenary contact force on-line test scheme

A technology for online testing and contact force, which is applied in railway vehicle testing, force/torque/power measuring instruments, measuring devices, etc., can solve the problems of increasing the cost of line monitoring, and achieve the effect of avoiding simplified modeling and high sensitivity

Active Publication Date: 2020-12-25
INST OF MECHANICS - CHINESE ACAD OF SCI
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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 skateboa

Method used

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  • Pantograph-catenary contact force on-line test scheme
  • Pantograph-catenary contact force on-line test scheme
  • Pantograph-catenary contact force on-line test scheme

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Embodiment Construction

[0018] The specific structure and implementation process of this solution will be described in detail below through specific embodiments and accompanying drawings.

[0019] In one embodiment of the present invention, a solution for online testing of pantograph-catenary contact force is provided.

[0020] Such as figure 1 As shown, based on the balance principle of the space force system of the pantograph head, the pantograph-catenary contact force F c =F s -mg +F iner +F aero . In the formula, F s is the sum of the interaction forces between the bow slide and the supporting device, m is the mass of the bow, g is the acceleration of gravity, F iner is the bow inertial force, F aero For aerodynamic force. When the train is stationary, F iner = 0, F aero = 0, then there is a static contact force F c0 =F s -mg. The static contact force is related to factors such as pantograph airbag force and catenary tension. When the train is running, the vibration of the car body,...

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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...

Claims

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Application Information

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IPC IPC(8): G01L5/00G01M17/08
CPCG01L5/0028G01M17/08
Inventor 许向红燕永钊
Owner INST OF MECHANICS - CHINESE ACAD OF SCI
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