Method and system for testing velocity history of dynamic model based on pressure signal

A technology of pressure signal and testing method, which is applied in the direction of using fluid devices, etc., can solve the problems of low measurement efficiency, complicated operation, and inability to directly measure the real-time running speed of the train model, so as to reduce the measurement complexity and improve the measurement efficiency. Effect

Active Publication Date: 2020-03-24
INST OF MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] In the prior art, the method of measuring the speed of the dynamic model test is mostly fixed-point measurement, that is, measuring the speed of the train model passing a certain position, but this method cannot directly measure the real-time running speed of the train model, and it must be set in advance The position where the speed needs to be measured, the operation is more complicated, and the measurement efficiency is lower

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  • Method and system for testing velocity history of dynamic model based on pressure signal
  • Method and system for testing velocity history of dynamic model based on pressure signal
  • Method and system for testing velocity history of dynamic model based on pressure signal

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[0051] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0052] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0053] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the description.

[0054] In all examples shown and discussed herein, any specific values ​​should be construed as exemplary only, and not as limitations. Therefore, other instances of the exemplary embodiment may have dif...

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Abstract

The invention discloses a pressure signal-based dynamic model speed history testing method and system, which relate to the technical field of dynamic model speed measurement. The method comprises steps: the geometric model of an actual train is reduced to a train model according to a predetermined proportion; a data acquisition system is mounted on the train model, the data acquisition system comprises at least one pressure sensor, when the train model runs, the pressure value of the train model is measured by the pressure sensor mounted on the train model, and according to the change relationship of pressure along with time, a pressure-time change curve is obtained; and after the pressure-time change curve is measured and obtained, the real-time running speed of the train model is calculated. The pressure-time change curve on the train model surface is measured by using the pressure sensor, the real-time running speed of the train model in the entire running process can be calculatedthrough the measured pressure-time change curve, the train model speed history measurement efficiency can be effectively improved, and the measurement complexity is reduced.

Description

technical field [0001] The present invention relates to the technical field of velocity measurement of a dynamic model, and more particularly, to a method and system for testing the velocity history of a dynamic model based on a pressure signal. Background technique [0002] The train is a large object running at high speed on the ground. The dynamic model is to reduce the geometric model of the actual train according to a certain ratio, and then accelerate the train model to the required speed through a certain acceleration method, so as to conduct train aerodynamics research. test means. During the whole running process, the speed parameter of the train model is very important. [0003] In the prior art, the method of measuring the speed of the dynamic model test is mostly fixed-point measurement, that is, measuring the speed of the train model passing a certain position, but this method cannot directly measure the real-time running speed of the train model, and it must b...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P3/26
CPCG01P3/26
Inventor 郭迪龙杨国伟刘雯郭易
Owner INST OF MECHANICS - CHINESE ACAD OF SCI
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