Continuous pressure measurement test system for model surface based on pressure scanning valve

A test system and surface pressure technology, applied in the direction of aerodynamic test, measuring device, machine/structural component test, etc., can solve the problems of low static test efficiency and less information of test results, and achieve complete and rich aerodynamic data, Effects of reduced test cost and accurate aerodynamic characteristics

Pending Publication Date: 2019-02-01
中国航空工业集团公司哈尔滨空气动力研究所
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Based on the above deficiencies, the present invention provides a model surface pressure continuous measurement test system based on pressure scanning valves, which overcomes the shortcomings of low efficiency and low information content of conventional step attitude angle static tests carried out in low-speed wind tunnels in the past.

Method used

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  • Continuous pressure measurement test system for model surface based on pressure scanning valve
  • Continuous pressure measurement test system for model surface based on pressure scanning valve

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Such as figure 1 As shown, a model surface pressure continuous measurement test system based on pressure scanning valve, including the main control machine 1, and two sets of pressure scanning valve 6, system processor 2, optical fiber interface unit 3, scanning valve digital interface unit 4, scanning The valve interface unit 5 and three sets of pressure calibration units 7, the main control machine 1 communicates with the system processor 2 through Ethernet, the system processor 2 is connected with the optical fiber interface unit 3 and the three sets of pressure calibration units 7 respectively, and the optical fiber interface unit 3 communicate with the digital interface unit 4 of the scanning valve through optical fiber, and the digital interface unit 4 of the scanning valve is connected with two sets of pressure scanning valves 6 through the interface unit 5 of the scanning valve.

Embodiment 2

[0013] The above-mentioned test method of simultaneous pressure measurement and force measurement data acquisition on the model surface is adopted, and the VXI data acquisition system is also used. The two systems are triggered by triggering and start acquisition at their respective sampling rates at the same time. The VXI data acquisition system detects in real time The signal change of the angle acquisition channel, when the value of the angle channel signal enters the corresponding value of the test angle, record the time from the moment of the corresponding angle to the moment of sampling, and find the model surface pressure continuous measurement test system at the corresponding moment according to this time The measured value is stored and circulated until the pressure collection of all test angles is completed, and the test of this train is completed.

[0014] Within the range of the attitude angle required to be measured, according to the continuous change of the attitu...

Embodiment 3

[0016] Taking the test angle of 0°-20° as an example, after the test wind speed is stable, the angle mechanism starts to run at a constant speed from 0° to 20°, the collection frequency of the VXI data acquisition system is 125Hz, and the measuring point frequency of the scanning valve is 20Hz, and the mechanism starts to run Finally, the main control computer triggers the two sets of systems to start collecting at the same time according to their respective sampling rates. The VXI data acquisition system detects the signal change of the angle acquisition channel in real time. When the value of the angle channel signal enters the corresponding value of the test angle, the VXI data While the acquisition system records the force measurement data of the balance corresponding to the current angle channel, it also records the time from the moment of the corresponding angle to the moment of sampling. The scanning valve pressure acquisition system finds the pressure measurement at the ...

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Abstract

The invention provides a continuous pressure measurement test system for a model surface based on a scanning valve, comprising a main control machine and a plurality of pressure scanning valves, and also comprising a system processor, an optical fiber interface unit, a scanning valve digital interface unit, a scanning valve interface unit, and a plurality of pressure calibration units. The systemprocessor is electrically connected to the optical fiber interface unit and the plurality of pressure calibration units respectively. The optical fiber interface unit communicates with the scanning valve digital interface unit by optical fibers. The scanning valve digital interface unit is connected to a plurality of pressure scanning valves through the scanning valve interface unit. The continuous pressure measurement test system can realize continuous collection of the pressure data in a model movement process, so that a series of pressure data from a range of machine angle changes can be obtained in just one experiment. Moreover, sufficient intensive aerodynamic characteristic data can be collected in the process of the constant change of the attitude angle of the model, which greatly improves the efficiency of the wind tunnel pressure measurement test, provides more complete and rich aerodynamic data, improves the test efficiency, and reduces the test cost.

Description

technical field [0001] The invention belongs to the technical field of aviation aerodynamic wind tunnel tests, and in particular relates to a model surface pressure continuous measurement test system based on a pressure scanning valve. Background technique [0002] With the development of science and technology, wind tunnel experiment technology, as a method widely used in aerodynamic research, provides the necessary guarantee for the development of aviation, aerospace and other fields. The conventional pressure measurement test in the wind tunnel is a sequence of test angles required by the customer in advance, and the surface of the model is tested for pressure measurement and force measurement (using VXI data acquisition system), and these angles are measured one by one in the test. For each angle in the test, it is necessary to wait for the model to be in place and stable before collecting the test data at this position. This step must be carried out for each required an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/06
CPCG01M9/06
Inventor 王萍王飞张琦马冰水姚顺禹毛世鹏毛霄宋显威周志坚徐龙金
Owner 中国航空工业集团公司哈尔滨空气动力研究所
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