Method and device for measuring contact force of pantograph and catenary

A measurement method and a technology of a measurement device, which are applied in the measurement of the change force of the optical properties of the material when it is stressed, can solve the problems of complex experimental devices and many installation restrictions, and achieve good anti-interference and measurement The effect of small error and simple installation of equipment

Pending Publication Date: 2018-01-23
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

However, as far as the above-mentioned contact force measurement method is concerned, the test accuracy needs to be improved, especia

Method used

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  • Method and device for measuring contact force of pantograph and catenary
  • Method and device for measuring contact force of pantograph and catenary
  • Method and device for measuring contact force of pantograph and catenary

Examples

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Example Embodiment

[0027] Example 1

[0028] Now combined with figure 1 The present invention will be further explained.

[0029] A method for measuring the bow-net contact force is to treat the pantograph bow head as a beam model and derive the bow head strain dynamic response equation.

[0030] The bow head strain dynamic response equation is as follows:

[0031]

[0032] Where: ε is the longitudinal strain of the pantograph sliding plate, measured by a strain sensor; F is the contact force between the pantograph and the net; m is the sprung mass of the bow head. In this embodiment, the TSG22 pantograph is used, m=4.8 kg; a i Is the acceleration of the i-th acceleration sensor at the bottom of the skateboard, measured by the acceleration sensor; n is the number of acceleration sensors, in this embodiment n=2; k is the aerodynamic proportional coefficient, where k=0.00228; v is the train operation Speed, x p Is the abscissa of the position of the contact point; x is the abscissa of any point along the...

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Abstract

The invention discloses a method and device for measuring the contact force of a pantograph and a catenary, belonging to the technical field of the safety of an electrified railway catenary. The basicidea is that a pantograph head is viewed as a beam model, and a corresponding relation between pantograph strain and contact force is established; and according to strain and acceleration data generated by a pantograph sliding plate due to pantograph and catenary state interaction, real-time pantograph and catenary dynamic contact force and pull-out value are obtained. The device comprises a sensor unit, a signal acquisition unit and a data processing unit. The strain of the pantograph is measured to obtain contact force, related variables are few, and an error generated by an intermediate variable is reduced; while the contact force is measured, a catenary pull-out value can be measured; the equipment installation is simple; a fiber strain sensor is adopted, the size is small, the weightis light, the fiber strain sensor can be embedded into the pantograph sliding plate, and the influence on the structure of the pantograph is small; and the method and device are used for measuring catenary-pantograph system dynamic contact force and pull-out value.

Description

technical field [0001] The invention belongs to the technical field of electrified railway catenary detection, in particular to the field of safety monitoring and fault diagnosis of a pantograph catenary system. Background technique [0002] In high-speed electrified railways, the pantograph installed on the roof of the train and the catenary erected next to the track line realize the transmission of electric energy through sliding contact, and the dynamic contact force between the catenary-pantograph directly reflects the The flow quality of the system. In order to reasonably evaluate the matching relationship of the design parameters of the pantograph-catenary system, and to grasp the evolution law of the flow-receiving quality of the high-speed train during normal service, it is necessary to accurately monitor the dynamic contact force of the pantograph-catenary system through online monitoring. [0003] At present, the more commonly used method is to detect the contact ...

Claims

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Application Information

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IPC IPC(8): G01L1/24
Inventor 张卫华周宁谭梦颖李瑞平邹栋
Owner SOUTHWEST JIAOTONG UNIV
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