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Test method that fast realizes wind tunnel small scale pressure detection

A test method and small-scale technology, applied in the field of wind tunnel tests, can solve the problems of inability to measure pulsating pressure, cumbersome preparations, difficult pressure test tasks, etc., achieve simultaneous acquisition of force measurement and pressure measurement, reduce signal interference, and realize Effect of pulsatile pressure measurement

Pending Publication Date: 2018-12-07
LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
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Problems solved by technology

In these cases, it is not suitable to use electronic scanning valves, because electronic scanning valves are composed of upper computer, system host, scanning valves, quick-change connectors, cables, air sources and air source controllers, etc., and the preparation work is cumbersome and difficult. Quickly realize the pressure measurement task; secondly, the electronic scanning valve is limited by the scanning frequency and installation, so it can only complete the static pressure measurement test and cannot perform the pulsating pressure measurement; in addition, in the past dynamic pressure measurement test, the electronic scanning valve is vulnerable to Electromagnetic Interference of High Power Motor and Strong Current

Method used

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  • Test method that fast realizes wind tunnel small scale pressure detection
  • Test method that fast realizes wind tunnel small scale pressure detection

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Embodiment Construction

[0026] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0027] like figure 1 As shown, a front-end pressure measurement module is designed with a modular structure. The external dimensions are 10mm×120mm×70mm. The pressure measurement module can be placed inside the model, and the pressure signal to be measured on the model can be directly converted into an electrical signal. The cable is connected to the wind tunnel conventional balance signal acquisition system, and each pressure measurement module is virtualized as a pressure measurement balance. Using the module channel coefficient calibrated in advance, the wind tunnel conventional force measurement acquisition system can directly restore the measured electrical signal into a pressure value. The pressure measurement module is designed with an all-metal shell, which has the ability to shield e...

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Abstract

The invention discloses a test method that fast realizes wind tunnel small scale pressure detection; the method comprises the following steps: a set of pressure taps are connected on a balance measuring cable in a wind tunnel via a pressure detection module; the pressure detection module is virtualized as a balance; the pressure on the pressure tap can be obtained via reading a signal on the balance measuring cable; unlike a conventional method in which an electronic scan valve sets massive devices and pipelines in the wind tunnel field, the method only uses the existing balance measuring cable in the wind tunnel to fast obtain the pressure value of the corresponding point in the wind tunnel; the test method is convenient and fast, and has an excellent anti-electromagnetic interference capability.

Description

technical field [0001] The invention relates to the field of wind tunnel tests, in particular to the problem of small-scale air pressure measurement in a wind tunnel under an electromagnetic environment. Background technique [0002] In wind tunnel tests, pressure measurement is a very common test content. For pressure measurement, the current technology is very mature, with a variety of testing equipment; while the pressure measurement in the wind tunnel mainly uses electronic scanning valves to measure the surface pressure of the model. [0003] The electronic scanning valve has the characteristics of high precision, fast speed, and scalability. For the large-scale pressure measurement and acquisition tasks of hundreds or thousands of points, the electronic scanning valve is the best choice; but there is a problem, no matter how many measurement points, the electronic scanning valve The basic components of the sweep valve are all essential; therefore, for wind tunnel test...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/06
CPCG01M9/06
Inventor 刘忠华吴福章陈洪陈浩吴志刚徐开明尧祝
Owner LOW SPEED AERODYNAMIC INST OF CHINESE AERODYNAMIC RES & DEV CENT
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