CN201063193Y - Wireless pressure tester for wind tunnel test - Google Patents
Wireless pressure tester for wind tunnel test Download PDFInfo
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- CN201063193Y CN201063193Y CNU2007200413851U CN200720041385U CN201063193Y CN 201063193 Y CN201063193 Y CN 201063193Y CN U2007200413851 U CNU2007200413851 U CN U2007200413851U CN 200720041385 U CN200720041385 U CN 200720041385U CN 201063193 Y CN201063193 Y CN 201063193Y
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Abstract
The utility model discloses a wireless pressure measuring device for wind tunnel test, which comprises a lower machine and an upper machine connected by a wireless data transmission module, and the lower machine and the wireless data transmission module are arranged inside the test model. The lower machine comprises a sensor, a signal conditioning circuit and a control unit. The sensor is connected with a pressure hole on the surface of the model via a piezometric tube, and outputs corresponding voltage signal according to the pressure distribution on the model surface. The signal is processed by the signal conditioning circuit, converted by the A/D module of the control unit, and then transmitted to the upper machine to finish measurement by the wireless data transmission module arranged inside the model. The utility model has modularization design, simple structure, easy extension, portability, flexible and wide application, which can be applied in measuring the pressure distribution on the model surface in wind tunnel test and in wireless measurement of other applications, such as measurement of physical parameters like temperature and humidity.
Description
One technical field
The utility model combines wireless data transmission technology and 32 ARM embedded systems with wind tunnel test, be used for the device of wireless measurement of the model surface pressure distribution of wind tunnel test.
Two background technologies
Wind tunnel test remains at present obtains that aircraft surface pressure distribution, boats and ships surface pressure distribution, buildings wind are carried, bridge wind carries the most direct, most important means.The measurement of model surface pressure distribution in the wind tunnel test, main application is wired piezometric tube pressure measurement mode at present.This pressure measurement mode is when measuring, and general piezometric tube links to each other with the model surface pressure tap, and pressure is caused the wind-tunnel outside, utilizes pressure transducer to experience pressure again, and the output electric signal is finished measurement.There is certain weak point in this pressure measurement mode: a) existence of pressure instrumentataion can influence the actual flow field in the wind-tunnel, influences measurement result; B) piezometric tube is longer, measures the lag-effect that exists to a certain degree, and the dynamic pressure time error is bigger measuring; C) inconvenience is measured the pressure distribution on motion model surface; D) device volume is big, uses inconvenient.
Three utility model contents
Goal of the invention of the present utility model is to provide the disturbing effect of a kind of effective elimination pressure instrumentataion to flow field in the wind-tunnel, improves measuring accuracy, and can realize the wireless pressure tester of the wind tunnel test of motion model surface pressure distribution.
The technical solution that realizes the utility model purpose is: the wireless pressure tester of a kind of wind tunnel test, connect to form by wireless data transfer module and host computer by slave computer, this slave computer and wireless data transfer module all are arranged on test model inside, this slave computer comprises sensor, signal conditioning circuit and control module, this sensor links to each other with the pressure tap of model surface by piezometric tube, pressure distribution output correspondent voltage signal according to model surface, after signal carries out the A/D conversion through the signal conditioning circuit processing with by the A/D module of control module successively, by the wireless data transfer module that is installed in model inside measurement data is sent to host computer again, finishes measurement.
The utility model compared with prior art, its remarkable advantage: (1) adopts modular design, form simple, be easy to expand, be easy to carry, applying flexible, applied widely, except being applied to the measurement of model surface pressure distribution in the wind tunnel test, can also be applied to the wireless measurement of other use occasion, as physical parameters such as temperature, humidity are measured; (2) pressure instrumentataion all is installed in test model inside, has eliminated the disturbing effect to flow field in the wind-tunnel, has improved measuring accuracy; (3) piezometric tube of Shi Yonging is shorter, has eliminated the lag-effect in the pressure test substantially, the measuring accuracy when having improved the systematic survey dynamic pressure; (4) can realize measurement to the motion model surface pressure distribution; (5) adopt 32 ARM embedded systems, improved the data processing speed of measured node.
Below in conjunction with accompanying drawing the utility model is described in further detail.
Four description of drawings
Accompanying drawing is the structured flowchart of the wireless pressure tester of the utility model wind tunnel test.
Five embodiments
The wireless pressure tester of wind tunnel test of the present invention, connect to form by wireless data transfer module and host computer by slave computer (being measured node), this slave computer and wireless data transfer module all are arranged on test model inside, this slave computer comprises sensor, signal conditioning circuit and control module, this sensor links to each other with the pressure tap of model surface by piezometric tube, pressure distribution output correspondent voltage signal according to model surface, after signal carries out the A/D conversion through the signal conditioning circuit processing with by the A/D module of control module successively, by the wireless data transfer module that is installed in model inside measurement data is sent to host computer again, finishes measurement; This control module be responsible for controlling slave computer operation, signal is carried out A/D conversion, stores transformation result and control wireless data transfer module measurement data is transferred to host computer.Signal conditioning circuit is adjusted according to type of sensor, generally speaking, comprises differential amplifier circuit and filtering circuit two parts.Adopt the control module of 32 ARM7 embedded systems as measured node, concrete chip model is LPC2131, selects 32 ARM7 embedded systems for use, is because the arm processor volume is little, low in energy consumption, cost is low and the performance height.Control module be responsible for the control survey node operation, signal is carried out A/D conversion, stores transformation result and control wireless data transfer module measurement data is transferred to host computer etc.
Below in conjunction with details and the working condition of accompanying drawing detailed description according to the concrete device that the utility model proposes.To use device to be measured as example for pressure distribution to the airfoil surface in the low-speed wind tunnel test.The test aerofoil profile is NACA0025, and airfoil surface is provided with 16 pressure taps altogether.
Device is made up of measured node (slave computer), wireless data transfer module and host computer.In order to eliminate the disturbing effect of pressure instrumentataion to flow field in the wind-tunnel, the wireless data transfer module of measured node and measured node side all is installed in aerofoil profile inside.
Measured node is made up of 16 micropressure sensors, signal conditioning circuit and control modules, and wherein, signal conditioning circuit comprises differential amplifier circuit and RC passive low-pass filter circuit two parts.Device is selected the control module of 32 ARM7 embedded systems as measured node for use, and concrete chip model is LPC2131, selects 32 ARM7 embedded systems for use, is because the arm processor volume is little, low in energy consumption, cost is low and the performance height.Selecting micropressure sensor for use, is because the aerofoil profile surface pressing is less in the low-speed wind tunnel, uses the little micropressure sensor of range to help to improve measuring accuracy.As shown in drawings, 16 micropressure sensors link to each other by 16 pressure taps of piezometric tube and airfoil surface, change output correspondent voltage signal according to the pressure of airfoil surface.Because the voltage signal of micropressure sensor output is a differential signal, there is common mode voltage, in order to improve the amplification precision, need to adopt differential amplifier circuit that signal of sensor is amplified, the differential amplifier circuit in this device is that core constitutes with integrated instrument amplifier AD623.Consider that the undesired signal in this device is less, the RC passive low-pass filter circuit can satisfy the filtering requirements of this device.Because the built-in A/D module of ARM embedded system in the device has only 8 A/D ALT-CH alternate channels, and therefore the quantity of sensor need be selected 16 road signals of sensor output more than 8, and each part signal wherein of selecting carries out the A/D conversion.This function is to be cooperated by the control module ARM7 chip LPC2131 of device and multi-way switch MAX399 to realize.Two multi-way switch MAX399 receive 16 signal of sensor, according to the control signal of LPC2131 output, each select wherein 4 the tunnel carry out the A/D conversion.As long as make control signal form 00,01,10,11 circulation, select all signals to realize the A/D conversion just can circulate.The digital signal that A/D is converted to is sent to host computer by wireless data transfer module again, finishes measurement.
Claims (3)
1. wireless pressure tester of wind tunnel test, it is characterized in that: connect to form by wireless data transfer module and host computer by slave computer, this slave computer and wireless data transfer module all are arranged on test model inside, this slave computer comprises sensor, signal conditioning circuit and control module, this sensor links to each other with the pressure tap of model surface by piezometric tube, pressure distribution output correspondent voltage signal according to model surface, after signal carries out the A/D conversion through the signal conditioning circuit processing with by the A/D module of control module successively, by the wireless data transfer module that is installed in model inside measurement data is sent to host computer again, finishes measurement.
2. the wireless pressure tester of wind tunnel test according to claim 1 is characterized in that: signal conditioning circuit connects filtering circuit by differential amplifier circuit and forms.
3. the wireless pressure tester of wind tunnel test according to claim 1 is characterized in that: adopt the control module of 32 ARM7 embedded systems as slave computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200413851U CN201063193Y (en) | 2007-08-07 | 2007-08-07 | Wireless pressure tester for wind tunnel test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200413851U CN201063193Y (en) | 2007-08-07 | 2007-08-07 | Wireless pressure tester for wind tunnel test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201063193Y true CN201063193Y (en) | 2008-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2007200413851U Expired - Fee Related CN201063193Y (en) | 2007-08-07 | 2007-08-07 | Wireless pressure tester for wind tunnel test |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435413A (en) * | 2011-09-21 | 2012-05-02 | 中国空气动力研究与发展中心高速空气动力研究所 | Method for ascertaining correspondence relationship of pressure measuring points of wind tunnel test model |
| CN102692311A (en) * | 2012-05-11 | 2012-09-26 | 西北工业大学 | Pressure measurement tail rake for wing section tunnel test |
| CN104897360A (en) * | 2015-06-10 | 2015-09-09 | 中国空气动力研究与发展中心低速空气动力研究所 | Wireless measuring method for direction field |
| CN105258913A (en) * | 2015-10-13 | 2016-01-20 | 中国空气动力研究与发展中心高速空气动力研究所 | Method for measuring and determining normal shock wave position of intermittent supersonic wind tunnel |
| CN105258914A (en) * | 2015-11-13 | 2016-01-20 | 中国空气动力研究与发展中心低速空气动力研究所 | Low-speed wind tunnel flow field test micropressure measurement system |
| CN108202878A (en) * | 2016-12-20 | 2018-06-26 | 北京空间技术研制试验中心 | Blunt body shape flight vehicle aerodynamic measures tracting pressuring hole layout designs and optimization method |
| CN108332935A (en) * | 2018-01-20 | 2018-07-27 | 南京航空航天大学 | A kind of wireless pressure tester and pressure testing method for high-speed wind tunnel rotating model |
| CN112816126A (en) * | 2020-12-24 | 2021-05-18 | 中国飞行试验研究院 | Intelligent flexible pressure measuring belt for flight test |
| CN114791349A (en) * | 2022-06-20 | 2022-07-26 | 中国空气动力研究与发展中心低速空气动力研究所 | Wind tunnel pressure measuring system based on digital pressure measuring module |
| CN114791330A (en) * | 2022-06-20 | 2022-07-26 | 中国空气动力研究与发展中心低速空气动力研究所 | Multichannel pressure scanning valve system |
-
2007
- 2007-08-07 CN CNU2007200413851U patent/CN201063193Y/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435413B (en) * | 2011-09-21 | 2013-11-20 | 中国空气动力研究与发展中心高速空气动力研究所 | Method for ascertaining correspondence relationship of pressure measuring points of wind tunnel test model |
| CN102435413A (en) * | 2011-09-21 | 2012-05-02 | 中国空气动力研究与发展中心高速空气动力研究所 | Method for ascertaining correspondence relationship of pressure measuring points of wind tunnel test model |
| CN102692311A (en) * | 2012-05-11 | 2012-09-26 | 西北工业大学 | Pressure measurement tail rake for wing section tunnel test |
| CN102692311B (en) * | 2012-05-11 | 2014-04-16 | 西北工业大学 | Pressure measurement tail rake for wing section tunnel test |
| CN104897360A (en) * | 2015-06-10 | 2015-09-09 | 中国空气动力研究与发展中心低速空气动力研究所 | Wireless measuring method for direction field |
| CN105258913B (en) * | 2015-10-13 | 2017-09-26 | 中国空气动力研究与发展中心高速空气动力研究所 | A kind of method for temporarily rushing formula supersonic wind tunnel normal shock wave position measurement and judgement |
| CN105258913A (en) * | 2015-10-13 | 2016-01-20 | 中国空气动力研究与发展中心高速空气动力研究所 | Method for measuring and determining normal shock wave position of intermittent supersonic wind tunnel |
| CN105258914A (en) * | 2015-11-13 | 2016-01-20 | 中国空气动力研究与发展中心低速空气动力研究所 | Low-speed wind tunnel flow field test micropressure measurement system |
| CN105258914B (en) * | 2015-11-13 | 2019-01-08 | 中国空气动力研究与发展中心低速空气动力研究所 | A kind of low-speed wind tunnel flow field test micro-pressure measurement system |
| CN108202878A (en) * | 2016-12-20 | 2018-06-26 | 北京空间技术研制试验中心 | Blunt body shape flight vehicle aerodynamic measures tracting pressuring hole layout designs and optimization method |
| CN108202878B (en) * | 2016-12-20 | 2021-10-15 | 北京空间技术研制试验中心 | Layout design and optimization method for aerodynamic measurement pressure guide holes of blunt body profile aircraft |
| CN108332935A (en) * | 2018-01-20 | 2018-07-27 | 南京航空航天大学 | A kind of wireless pressure tester and pressure testing method for high-speed wind tunnel rotating model |
| CN112816126A (en) * | 2020-12-24 | 2021-05-18 | 中国飞行试验研究院 | Intelligent flexible pressure measuring belt for flight test |
| CN114791349A (en) * | 2022-06-20 | 2022-07-26 | 中国空气动力研究与发展中心低速空气动力研究所 | Wind tunnel pressure measuring system based on digital pressure measuring module |
| CN114791330A (en) * | 2022-06-20 | 2022-07-26 | 中国空气动力研究与发展中心低速空气动力研究所 | Multichannel pressure scanning valve system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080521 Termination date: 20090907 |