A non-contact method for measuring the position relationship of pantograph elevating bow arm
A non-contact, measurement method technology, applied in the direction of measurement devices, optical devices, instruments, etc., can solve the problems of high cost, no experimental measurement method, difficult to realize, etc.
Active Publication Date: 2020-08-28
INST OF MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology
[0003] Since the high-speed rail pantograph is a key technical part of the high-speed rail, it often has the characteristics of high cost and precise manufacturing. The traditional contact measurement method may affect the normal operation of the pantograph, which is often difficult to achieve. At this stage, the measurement of each arm of the pantograph The positional relationship between poles is simulated by computer, and there is no corresponding experimental measurement method
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[0034] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0035] In the description of the present invention, it should be understood that the orientations and positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right" etc. The positional relationship is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or component must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be interpreted as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, a feature d...
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The invention discloses a non-contact pantograph lifting and descending arm lever position relationship measurement method, wherein an underframe of a pantograph is mounted on a horizontal plane; twocameras are erected at one side, a certain included angle is formed between the axes of lenses of two cameras, and by regulating a fixed distance and the included angle of the cameras or regulating focal lengths and apertures of the cameras, two cameras image clearly and cover all image information of the pantograph; then, marking points are arranged on the pantograph; after calibration, in the process that a pantograph power device controls lifting or descending, two cameras simultaneously acquire image information, position changes of the marking points are identified by utilizing DIC operation software, and a coordinate value of each marking point on the pantograph relative to a pantograph actuation moment is measured; and finally, a mathematical model is established, and pantograph included angles at the corresponding moments are calculated by the coordinate values, so as to implement measurement on an inter-lever position relationship in the pantograph actuating process. Accordingto the invention, by non-contact measurement of imaging of a digital image, the position relationship between each arm lever of the high-speed rail pantograph is converted into data which can be measured by experiments.
Description
technical field [0001] The invention belongs to the technical field of locomotive manufacturing and inspection and maintenance, and in particular relates to a method for measuring the relative position relationship of a pantograph elevating bow arm using a non-contact three-dimensional digital image correlation method. Background technique [0002] The pantograph is an important current-receiving electrical equipment for electric traction locomotives to obtain electric energy from the catenary, and is installed on the roof of locomotives or motor vehicles. Pantographs can be divided into single-arm bows and double-arm bows, both of which are composed of slide plates, upper frames, lower arm rods, pull rods, underframes, bow springs, transmission cylinders, supporting insulators and other components. In the analysis of related problems, we hope to grasp the real-time motion relationship of each arm of the pantograph. [0003] Since the high-speed rail pantograph is a key tec...
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IPC IPC(8): G01B11/00
CPCG01B11/00
Inventor 许向红张颢辰叶梓佑
Owner INST OF MECHANICS CHINESE ACAD OF SCI