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Wind tunnel model ice shape measuring method and device

A measuring method and technology for measuring devices, which are applied to measuring devices, using optical devices, instruments, etc., can solve the problems of inability to accurately measure ice-shaped contour shape data, large random errors in measurement, and high labor intensity, and achieve a low contour blind spot rate. , The effect of small random error in measurement and low labor intensity

Inactive Publication Date: 2012-06-13
中国空气动力研究与发展中心设备设计及测试技术研究所
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Problems solved by technology

[0002] At present, the traditional ice shape measurement methods that have been carried out are as follows: one is the ice shape photography technology, which generally can only obtain a qualitative understanding of the ice shape and structure, and cannot accurately measure the ice shape contour shape data; the second is Gypsum pouring technology is used for ice shape measurement. The ice shape is obtained by removing ice cubes from the model for plaster casting, but this method is labor-intensive, directly destroys the ice shape, and the measurement is inaccurate; the third is manual drawing, This is a commonly used ice shape measurement method, but there are also shortcomings such as interrupting the test, destroying the ice shape, and large random errors in measurement.

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  • Wind tunnel model ice shape measuring method and device
  • Wind tunnel model ice shape measuring method and device
  • Wind tunnel model ice shape measuring method and device

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Embodiment approach

[0034] The optical measurement method is currently the most widely used in three-dimensional geometric shape measurement, and it is also the fastest non-contact method to accurately obtain the contour size of the relative measurement speed. This method can be used for point-by-point, line-by-line scanning measurements, or full-field measurements, all of which depend on the shape of the optical signal projected on the object being sided, such as light spots, rays or gratings. In the measurement of the outline dimension of the icing body, it is required to quickly reflect the section characteristics of the icing body under test, so the optical section method based on laser sheet light and machine vision is selected. The measurement speed of this method is faster than that of the point scanning method, and the measurement accuracy is higher than that of the projected grating or binocular measurement method. The shape and outline of the blind zone rate is low.

[0035] To calibra...

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Abstract

The invention discloses a wind tunnel model ice shape measuring method and a wind tunnel model ice shape measuring device. The method is characterized by comprising the following steps of: projecting laser sheet light to the cross section of a model ice layer to form ice shape outline radiography laser stripes, acquiring data of the ice shape outline radiography laser stripes by using an image recording and acquisition device, transmitting the acquired data to an image processing system, acquiring the required ice shape measuring data by data processing, acquiring ice shape outline size by data processing and analysis, and displaying images. The measuring device consists of a camera box, a laser device box, a sheet light height adjusting device and an image acquisition and data processing system. The invention has the advantages of high ice shape measuring precision, convenience in use, high measuring speed, low labor intensity of measuring personnel and the like.

Description

technical field [0001] The invention relates to a wind tunnel model measurement technology, in particular to a wind tunnel model ice shape online measurement method and device. Background technique [0002] At present, the traditional ice shape measurement methods that have been carried out are as follows: one is the ice shape photography technology, which generally can only obtain a qualitative understanding of the ice shape and structure, and cannot accurately measure the ice shape contour shape data; the second is Gypsum pouring technology is used for ice shape measurement. The ice shape is obtained by removing ice cubes from the model for plaster casting, but this method is labor-intensive, directly destroys the ice shape, and the measurement is inaccurate; the third is manual drawing, This is a commonly used ice shape measurement method, but it also has disadvantages such as interrupting the test, destroying the ice shape, and large random errors in measurement. Conte...

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Application Information

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IPC IPC(8): G01B11/25
Inventor 张龙郭隆德杨建军张俊吴运刚
Owner 中国空气动力研究与发展中心设备设计及测试技术研究所
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