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A measuring device and method for measuring force after eddy currents are induced by small surface protrusions

A measurement device and measurement method technology, applied in the field of test measurement, can solve problems such as difficulty in measurement, difficulty in measurement, and inability to define the degree of impact of surface damage.

Active Publication Date: 2021-12-07
CHINA ACAD OF LAUNCH VEHICLE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the test measurement, the flow change caused by small protrusions on the surface is difficult to measure due to the small magnitude of the force acting on it, which is relatively small compared to the overall force of the test piece
If the local protrusions are measured separately, it is difficult to ensure that the local flow will not be destroyed and the measurement data will be polluted
[0003] It is difficult to ensure that the local flow is not disturbed and measure the force on the raised part at the same time with the existing test technology
Therefore, it is difficult to study the influence of the scale and shape changes of small protrusions on the flow
The degree of influence of surface damage cannot be defined, and the law of the characteristic scale of damage affecting the flow field is difficult to identify

Method used

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  • A measuring device and method for measuring force after eddy currents are induced by small surface protrusions
  • A measuring device and method for measuring force after eddy currents are induced by small surface protrusions
  • A measuring device and method for measuring force after eddy currents are induced by small surface protrusions

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Embodiment 1

[0039] In order to test the flow changes caused by small protrusions on the surface of the object, the magnitude of the force on the protrusions is relatively small compared to the overall force on the test piece, so it is difficult to measure. The bump needs to be isolated locally for force measurement alone. At the same time, to prevent the flow from being affected by the external environment, it is necessary to seal the flow. However, it is necessary to prevent the sealing system from disturbing the measurement accuracy of the balance. The invention provides a measuring device for the force after the eddy current is caused by the small protrusion on the surface, which can isolate the small protrusion on the surface through the bracket to measure the local force separately, and at the same time adopt the water seal under the surface to separate the external flow from the surface flow isolation.

[0040] Such as figure 1 , in the present embodiment, the measuring device of...

Embodiment 2

[0046] In a preferred embodiment of the present invention, as image 3 , the horizontal balance may specifically include: a first horizontal balance 71 , a second horizontal balance 72 , a third horizontal balance 73 and a fourth horizontal balance 74 .

[0047] The four sides of bracket 3 are respectively connected with four inner wall sides of watertight cylinder 5 by the first horizontal balance 71, the second horizontal balance 72, the third horizontal balance 73 and the fourth horizontal balance 74; Balance 6 is connected with the bottom of watertight cylinder 5.

[0048] Preferably, the first horizontal balance 71, the second horizontal balance 72, the third horizontal balance 73 and the fourth horizontal balance 74 are on the same horizontal plane; wherein, the first horizontal balance 71 and the third horizontal balance 73 are parallel to the flow direction of the liquid , the flow direction of the second horizontal balance 72 and the fourth horizontal balance 74 liqu...

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Abstract

The invention discloses a measuring device and method for measuring force after eddy currents are caused by small protrusions on the surface. The measuring structure includes: a first flat plate, a second flat plate, a horizontal balance, a vertical balance, a bracket, a raised structure and a top opening The watertight cylinder; the bracket is fixed in the watertight cylinder through the horizontal balance; the raised structure is installed on the bracket; the first flat plate and the second flat plate are symmetrically installed at both ends of the top opening of the watertight cylinder; the watertight cylinder is filled with liquid, A horizontal balance is located below the level of the liquid. The present invention obtains the force bearing process of local small protrusions in a relatively non-contact local force bearing measurement method.

Description

technical field [0001] The invention belongs to the technical field of test and measurement, and in particular relates to a measuring device and a measuring method for force exerted after eddy currents are caused by small protrusions on the surface. Background technique [0002] In the test measurement, the flow change caused by small protrusions on the surface is difficult to measure due to the small magnitude of the force acting on it, which is relatively small compared to the overall force of the test piece. If the local protrusions are measured separately, it is difficult to ensure that the local flow will not be damaged and the measurement data will be polluted. [0003] It is difficult to ensure that the local flow is not disturbed and measure the force on the raised part at the same time by using the existing test technology. Therefore, it is difficult to study the influence of scale and shape changes of small protrusions on flow. The degree of influence of surface ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M9/02G01M9/06
CPCG01M9/02G01M9/062
Inventor 刘丽丽陆宏志赵月赵静俞启东陈培芝顾祥玉
Owner CHINA ACAD OF LAUNCH VEHICLE TECH