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Wide-range high-precision pressure measuring device and method for wind tunnel test

A technology of wind tunnel test and measurement device, which is applied in the direction of measurement device, measurement of fluid pressure, simultaneous measurement of multiple hydraulic valves, etc. It can solve the problem that the wind tunnel test cannot be finely measured, and achieve convenient and fast multi-point measurement and range, The effect of refinement improvement and scalability improvement

Active Publication Date: 2022-07-29
AVIC SHENYANG AERODYNAMICS RES INST
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a wide-range high-precision pressure measurement device and method for wind tunnel tests, so as to solve the problem that the pressure measurement device cannot measure finely in wind tunnel tests of different pressures

Method used

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  • Wide-range high-precision pressure measuring device and method for wind tunnel test

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Embodiment 1

[0028] As shown in the figure, Embodiment 1: a wide-range and high-precision pressure measuring device for wind tunnel test, comprising a primary gas pipe 41, a reducing joint 5, a secondary gas pipe 42, a shunt 3, Several air pressure measurement systems, range switching devices, power supplies 9 and data acquisition devices 11;

[0029] One end of the primary air pipe 41 is connected to the pressure measurement point of the wind tunnel, the diameter of the primary air pipe 41 is larger than that of the secondary air pipe 42, and the other end of the primary air pipe 41 passes through the reducing joint 5 It is communicated with the secondary air pipe 42, and the other end of the secondary air pipe 42 is communicated with the intake end of the shunt 3, and the ranges of several high-precision pressure transmitters 1 are successively progressive according to the measurement needs;

[0030] The air pressure measurement system includes a tertiary air pipe 43, one end of which is...

Embodiment 2

[0044] Embodiment 2: The present invention also provides a wide-range high-precision pressure measurement method for wind tunnel test, which is completed by using the wide-range high-precision pressure measurement device for wind tunnel test described in Embodiment 1, It includes the following steps:

[0045] Step 1: connect the primary air pipe 41 with the measuring point interface, and connect the range switching device and the data acquisition device 11 with the remote host computer;

[0046] Step 2: According to the current wind tunnel test requirements, the remote host computer automatically selects a required range through the range switching program, and transmits the command to the range switching device to control the corresponding first SPST relay switch 811 and second SPST The single-throw relay switch 821 is turned on, and then the corresponding solenoid valve 2 and the high-precision pressure transmitter 1 are activated, and the high-precision pressure transmitter...

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Abstract

The invention discloses a wide-range high-precision pressure measurement device and method for a wind tunnel test, belongs to the technical field of pressure measurement, and aims to solve the problem that a pressure measurement device cannot perform fine measurement on wind tunnel tests with different pressures. Comprising a plurality of air pressure measuring systems, a measuring range switching device, a power supply and a data acquisition device, pressure measuring points are respectively connected with the plurality of air pressure measuring systems, and electromagnetic valves and high-precision pressure transmitters of the plurality of air pressure measuring systems are connected with an upper computer through the measuring range switching device. A high-density relay integration mode in the measuring range switching device is 100 channels, and connection and measuring range switching of at most 50 pressure transmitters are theoretically allowed, so that when the measuring range and the number of the transmitters need to be increased, only copying and expansion are needed according to the completely same connection mode, the requirements of multi-point measurement and flexible measuring range expansion are conveniently and rapidly met, and the measuring range switching device is suitable for large-scale popularization and application. And the pressure transmitter with the most suitable measuring range can be selected according to experiment requirements.

Description

technical field [0001] The invention belongs to the technical field of pressure measurement, and in particular relates to a wide-range and high-precision pressure measurement device and method for wind tunnel test. Background technique [0002] Many basic parameters of the wind tunnel test, such as the total pressure in the stable section and the static pressure in the test section, need to be measured by pressure transmitters. The premise and foundation of field quality. For different tests in the same wind tunnel, the pressure range of the basic pressure parameters is very large, which puts forward higher requirements for the pressure measurement device. For a wide range of pressure measurement requirements, a single large-range pressure transmitter is used for measurement. When the pressure is low, there will be a large measurement error; if different ranges are used, it is usually necessary to replace a suitable transmitter on site, and the test preparation efficiency ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/06G01L15/00
CPCG01M9/06G01L15/00
Inventor 程林曹阳张威郭晋崔晓春
Owner AVIC SHENYANG AERODYNAMICS RES INST
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