Method for detecting smoothness of inner surfaces of wind tunnels

A technology of surface flatness and inner surface, applied in measuring devices, instruments, optical devices, etc., can solve the problems of missed inspection flatness, excessive error, etc., and achieve the effect of improving quality

Active Publication Date: 2014-01-29
中国人民解放军63926部队
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Problems solved by technology

[0004] In order to solve the above problems, the present invention provides a method for detecting the flatness of the inner surface of the wind tunnel, which can realize the full-range detection of the flatness of the inner surface of the wind tunnel, and avoid the possibility of missing parts with

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  • Method for detecting smoothness of inner surfaces of wind tunnels
  • Method for detecting smoothness of inner surfaces of wind tunnels
  • Method for detecting smoothness of inner surfaces of wind tunnels

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[0016] Hereinafter, the present invention will be described in detail through exemplary embodiments. However, it should be understood that without further description, elements, structures, and features in one embodiment can also be beneficially combined into other embodiments.

[0017] Such as figure 1 As shown, the method for detecting the flatness of the inner surface of a wind tunnel according to an embodiment of the present invention includes the following steps:

[0018] (A) Scan the inner surface of the wind tunnel along the axis of the wind tunnel with a 3D laser scanner to obtain point cloud data on the inner surface of the wind tunnel. The specific process is to place the 3D laser scanner inside the wind tunnel so that the laser of the 3D laser scanner The laser emitted by the transmitter scans the inner surface of the wind tunnel, and the point cloud data on the inner surface of the wind tunnel is received by the receiver of the 3D laser scanner. Here, the three-dimensi...

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Abstract

The invention provides a method for detecting the smoothness of the inner surfaces of wind tunnels. The method includes steps of (a), scanning the inner surface of a wind tunnel by the aid of a three-dimensional laser scanner and acquiring point cloud data of the inner surface of the wind tunnel; (b), selecting a point in the point cloud data, selecting a point set in a specified range on the basis of the point and fitting the point set to obtain spatial planes; (c), determining deviation of each point in the point set and acquiring a difference value between a maximum deviation value and a minimum deviation value and using the difference value as an error of the surface smoothness of the region of the inner surface of the wind tunnel in the range of the point set; (d), comparing the error of the surface smoothness to a preset maximum permissible error, and combining a comparison result with other preset standards to determine whether the smoothness of the region of the inner surface of the wind tunnel in the range of the point set is qualified or not; (e), detecting the other points in the acquired point cloud data one by one according to procedures from the step (b) to the step (d). The method has the advantage that the smoothness of the full range of the inner surface of the wind tunnel can be detected by the method.

Description

technical field [0001] The invention relates to a method for detecting the flatness of a surface, in particular to a method for detecting the flatness of the inner surface of a wind tunnel. Background technique [0002] Wind tunnel refers to a kind of pipeline experimental equipment that can artificially generate and control airflow to simulate the flow of air around aircraft or objects, and can measure the effect of airflow on objects and observe physical phenomena. It is the most commonly used aerodynamic experiment. most efficient tool. During the experiment, the model or object is often fixed in the wind tunnel to obtain the experimental data repeatedly and economically. In order to make the experimental results accurate, the flow during the experiment must be similar to the actual flow state, that is, the requirements of the law of similarity must be met. However, due to wind Due to the constraints of tunnel size and dynamics, it is difficult to simulate all similar pa...

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Application Information

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IPC IPC(8): G01B11/30
Inventor 张笈玮邴光利李博平练晓丽
Owner 中国人民解放军63926部队
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