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Non-contact pantograph modal measurement method

A non-contact, pantograph technology, applied in the direction of railway vehicle testing, etc., can solve the problems of high measurement cost, poor stability, and inability to measure the working mode, so as to reduce additional risks, eliminate influence, and realize real-time measurement and data The effect of transmission

Active Publication Date: 2019-03-08
INST OF MECHANICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method needs to lay out sensors, which will have an inevitable additional mass impact on the pantograph, and then affect the pantograph mode
At the same time, a large number of acceleration sensors need to be deployed, the measurement cost is high, and the stability is poor
When conducting this test, the pantograph needs to be removed from the high-speed rail, and its working mode cannot be measured

Method used

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  • Non-contact pantograph modal measurement method
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  • Non-contact pantograph modal measurement method

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Embodiment Construction

[0036] The pantograph is an important current-receiving electrical equipment for electric traction locomotives to obtain electric energy from the catenary. In order to ensure the safety and stability of the driving process, it is necessary to carry out the modal test and analysis of the pantograph in service state.

[0037] The existing pantograph modal measurement adopts the contact measurement method. The acceleration sensor needs to measure the acceleration of a specific point on the pantograph. The three-way acceleration sensor obtains the X, Y, and Z directions of each measurement point of the pantograph. The vibration response of each knock point and vibration pickup point is obtained by using the PolyMax method to determine the order and fit, and obtain the natural frequency, mode shape, and mode damping ratio of the pantograph. This method needs to lay out sensors, which will have an inevitable additional mass impact on the pantograph, and then affect the mode of the p...

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Abstract

The invention discloses a non-contact pantograph modal measurement method which is used for measuring a pantograph modal. Two cameras, a fixing rack, a light source, a wireless transmission module andan upper computer are included. The cameras and the light source are installed on the fixing rack. The light source is used for irradiating the measured area of pantograph. The image of the measuredarea of the pantograph, which is shot by the cameras, is transmitted to the upper computer through a wireless transmission module for processing. The upper computer analyzes and processes the image and acquires the modal of the pantograph. The pantograph is installed on the top of a locomotive. The fixing rack is fixed to the top of the locomotive through a vacuum chuck and is in the same installation plane with the pantograph. The light source is a blue light source. The two cameras are equipped with band-pass filters which make the blue light source become an imaging source in front of lenses. The upper computer is provided with DIC operation software.

Description

technical field [0001] The invention belongs to the field of vibration measurement, in particular to a non-contact method for measuring the mode of a pantograph. Background technique [0002] The pantograph is an important current-receiving electrical equipment for electric traction locomotives to obtain electric energy from the catenary. In order to ensure the safety and stability of the driving process, it is necessary to carry out the modal test and analysis of the pantograph in service state. [0003] The existing pantograph modal measurement adopts the contact measurement method. The acceleration sensor needs to measure the acceleration of a specific point on the pantograph. The three-way acceleration sensor obtains the X, Y, and Z directions of each measurement point of the pantograph. The vibration response of each knock point and vibration pickup point is obtained by using the PolyMax method to determine the order and fit, and obtain the natural frequency, mode shap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/08
CPCG01M17/08
Inventor 许向红魏向东张颢辰
Owner INST OF MECHANICS - CHINESE ACAD OF SCI