CN205228770U - Low speed wind tunnel model position appearance ultrasonic measurement system reaches and puts up its survey that moves of calibrating and maring - Google Patents
Low speed wind tunnel model position appearance ultrasonic measurement system reaches and puts up its survey that moves of calibrating and maring Download PDFInfo
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- CN205228770U CN205228770U CN201520902248.7U CN201520902248U CN205228770U CN 205228770 U CN205228770 U CN 205228770U CN 201520902248 U CN201520902248 U CN 201520902248U CN 205228770 U CN205228770 U CN 205228770U
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Abstract
The utility model discloses a low speed wind tunnel model position appearance ultrasonic measurement system, including the controller, accurate constant voltage power supply and the target ultrasonic sensor who is connected with the controller respectively through the cable, beacon ultrasonic sensor and velocity of sound measuring transducer in real time, and the method of surveying the frame and measuring ultrasonic sensor, calibrate and mark target ultrasonic sensor through coordinate coincidence method beacon ultrasonic sensor and the real -time velocity of sound of moving through the utilization of basic point calibration method, utilize beacon ultrasonic sensor to obtain 3 or coordinate and these sensor the coordinate on the model system of axis of 3 above target ultrasonic sensor in the wind -tunnel system of axis on the model through surveying limit space resection, thereby through finally obtain low -speed wind tunnel test model complete position and orientation parameter this moment to finding the solution of two systems of axis conversion parameter, the utility model discloses a model position appearance ultrasonic measurement can realize the non -contact measurement of low speed wind tunnel model position appearance, has avoided installation condition, measuring equipment etc. In the test section to the disturbing influence in wind -tunnel flow field to avoid the pneumatic data measurement's of pair model influence.
Description
Technical field
The present invention relates to wind tunnel test field, especially relate to a kind of low-speed wind tunnel model pose ultrasound measurement system.
Background technology
The pose (position and attitude) of test model is one of key parameter requiring in low-speed wind tunnel test process to obtain, and its precision has very important meaning to test.In low-speed wind tunnel test process, model pose measuring method conventional at present comprises supporting mechanism nominal value method of substitution, laser grating mensuration, Gravity accelerometer mensuration, gyroscope survey method, six kinds of methods such as image measurement method and optoelectronic position sensitive detector mensuration, due to the restriction of often kind of method self character, all more or less there is some problems or defect in often kind of method, up to the present the pose parameter (attitude parameters of the location parameter in three displacement of the lines directions and three aviation order Eulerian angle) that can provide complete is not yet found, various experimental enviroment can be applicable to again (as the low temperature of icing wind tunnel test, negative pressure and high humility etc.) and installation environment (direct-action wind tunnel, return circuit wind tunnel, open jet working section and to remain silent test section) etc. measuring method.
Ultrasound wave refers to the sound wave of frequency higher than 20kHz, and in ultrasonic, the power ultrasonic of detection and medical ultrasonic etc., application is very wide at present.Wherein, supersonic sounding is that the velocity of sound in time by measuring ultrasound wave a certain spatial in medium and this medium determines one of detected space distance main detection ultrasonic technique application.But from current applicable cases, due in supersonic sounding using the velocity of sound as constant process, in addition due to the impact of Doppler effect, and make the precision of supersonic sounding not high.
Summary of the invention
The object of this invention is to provide a kind of low-speed wind tunnel model pose ultrasound measurement system, complete the measurement of pose parameter complete to tested model in wind-tunnel.
For achieving the above object, the present invention adopts following technical scheme:
A kind of low-speed wind tunnel model pose ultrasound measurement system, comprises controller, accurate stabilized voltage supply, with the target sonac be connected with controller respectively by cable, beacon sonac and real-time acoustic velocity measutement sensor.Wherein target sonac is fixedly installed on tested model, and target sonac is no less than four; Beacon sonac is fixedly installed on the internal face of low-speed wind tunnel test section, and beacon sonac is distributed in the surrounding of tested model, and beacon sonac is no less than four; At least three target sonacs on tested model can match the direct measurement realizing distance each other with at least four beacon sonacs on wind-tunnel inwall; Real-time acoustic velocity measutement sensor is fixedly installed on the internal face of low-speed wind tunnel test section, and velocity of sound sonac is distributed in the surrounding of tested model in real time, real-time velocity of sound sonac should match setting between two, without barrier thing between two real-time velocity of sound sonacs of pairing, sound wave can linearly can be propagated between two sonacs.
In wind tunnel test process, Ce Bian space resection is utilized to obtain the coordinate of more than 3 or 3 target sonacs in the wind-tunnel system of axis on model by beacon sonac, recycle these target sonacs solve now model coordinate axle system and wind-tunnel system of axis coordinate conversion matrix at the coordinate that model coordinate axle is fastened, comprise rotation matrix
rand translation matrix
t, translation matrix
tbe the position (x of model
0, y
0, z
0), then the attitude angle can obtaining model is solved to rotation matrix (comprise crab angle
Ψ, the angle of pitch
θand roll angle
Φ), the pose parameter that low-speed wind tunnel test model is this moment complete can be obtained.In process of the test, system completes tested model pose by the instruction of wind-tunnel master control system and measures in real time and measurement result is fed back to wind-tunnel master control system at any time, thus completes the real-time measurement of low-speed wind tunnel model pose.
Above-mentioned all the sensors is the sonac receiving and send integral type; Controller is arranged in operation outside low-speed wind tunnel controls, and the accurate stabilized voltage supply of powering for sonac is no less than one group, and it is inner that target sonac accurate stabilized voltage supply used can be arranged on tested mold cavity.
In order to improve measuring accuracy, wherein target sonac is arranged on tested model and is out of shape little position, and target sonac can not be arranged on the true origin of tested model coordinate axle system.
Carry out the Transfer rack calibrated and demarcate for low-speed wind tunnel model pose ultrasound measurement system, Transfer rack is made up of to straight line module, Y-direction straight line module, Z-direction straight line module, calibration sonac fixed support and controller etc. X.Wherein Z-direction straight line module is two covers, in the wainscot that the pedestal often overlapping Z-direction straight line module is separately fixed at test section and lower wall panels, Z-direction straight line module is provided with moving component, the direction of motion vertical of moving component and parallel with the Z-direction of the wind-tunnel system of axis; The pedestal two ends of Y-direction straight line module are fixed on the moving component of two cover Z-direction straight line modules separately, and the direction of motion of the moving component on Y-direction straight line module is parallel with the Y-direction of the wind-tunnel system of axis; X is fixed on the moving component of Y-direction straight line module to the pedestal of straight line module, and described calibration sonac fixed support is fixed on X on straight line module moving component, and X is to the direction of motion of straight line module moving component and the X of the wind-tunnel system of axis to parallel; Controller can control the motion of the moving component of each straight line module.
The process of system calibration and demarcation is as follows:
The calibration of the coordinate figure of beacon sonac and real-time acoustic velocity measutement sonac and demarcation utilize Transfer rack to adopt basic point calibration method to carry out, namely controlled the accurate location of calibration sonac by the moving component on controller control X, Y and Z-direction straight line module, and utilize supersonic sounding and Ce Bian space resection to obtain the accurate coordinate value in the wind-tunnel system of axis of beacon sonac and real-time acoustic velocity measutement sonac; Be arranged on the target sonac on tested model, it adopts coordinate coincidence method to carry out calibrating and demarcating at the coordinate figure that model coordinate axle is fastened, and is fixed in test section, by the attitude angle (crab angle of the instruments such as transit by model by tested model
Ψ, the angle of pitch
θand roll angle
Φ) adjust to 0 °, setting model reference point (model coordinate axle system initial point) overlaps with wind-tunnel system of axis initial point, beacon sonac and target sonac is utilized to adopt Ce Bian space resection to obtain the coordinate of target sonac in the wind-tunnel system of axis, because the wind-tunnel system of axis and model coordinate axle system overlap, the coordinate figure therefore measured is the coordinate figure that sensor of interest is fastened at model coordinate axle.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
Utilize the ultrasonic measurement method of low-speed wind tunnel test model pose can obtain complete low-speed wind tunnel test model pose parameter, comprise x
0, y
0, z
0,
Ψ,
θwith
Φsix parameters, wherein (x
0, y
0, z
0) position of finger print type, i.e. model reference point position in the wind-tunnel system of axis, (
Ψ,
θ,
Φ) attitude of finger print type, the i.e. crab angle of model, the angle of pitch and roll angle.
The velocity of sound measuring acquisition is in real time utilized to participate in calculating, avoid the error velocity of sound brought as constant process, beacon sonac, target sonac and real-time acoustic velocity measutement sensor have employed the sonac receiving and send integral type in addition, avoid the impact of Doppler effect, thus improve the precision of model pose measurement.
Ultrasonic measurement is non-cpntact measurement, utilizes this characteristic ultrasonic to achieve the non-cpntact measurement of low-speed wind tunnel model pose, avoids the impact of measuring equipment on Flow Field in Wind Tunnel; In addition, ultrasonic measurement can be used for the measurement of open and close mouth test section inner model pose, can overcome the impact of gas velocity, temperature, pressure, density and varying humidity etc., thus avoid the impact of experimental enviroment on low-speed wind tunnel model pose measurement.
Accompanying drawing explanation
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein:
Target sonac arrangenent diagram on Fig. 1 model;
Fig. 2 beacon sonac is at test section internal face arrangenent diagram of remaining silent;
Schematic diagram arranged by the real-time acoustic velocity measutement sensor of Fig. 3;
The composition frame chart of Fig. 4 model pose ultrasound measurement system;
Device sketch is used in Fig. 5 calibration and demarcation;
Wherein: 1 is real-time velocity of sound sonac, and 2 is target sonacs, and 3 is beacon sonacs, and 4 is accurate stabilized voltage supplys, 5 be calibration sonac, 6 be X to straight line module, 7 is Z-direction straight line modules, and 8 is Y-direction straight line modules.
Embodiment
The present invention is implemented by following steps layout:
One is on test model, fixedly mount target sonac (receive and send integral type sonac).For avoiding model wind-engaging to carry deformation effect measuring accuracy, target sonac should be arranged on the little position of distortion.Secondly, for improving measuring accuracy, target sonac should as far as possible away from the true origin of model coordinate axle system.In addition, for avoiding the axle system transformed error of the wind-tunnel system of axis and model coordinate axle system, the distance between impact point can not gap excessive, the quantity of impact point should be no less than 4.As Fig. 1 for shown in.Due in ultrasonic measurement process, the beacon sensor being arranged on target sonac on model and being arranged on model periphery will match uses, therefore to answer in warranty test process target sonac and beacon sonac can mutual direct detection to signal.
Two is receive in the remain silent model periphery of the internal face of test section or open jet working section of low-speed wind tunnel the beacon sonac sending integral type.Due to modal position and attitude angle variation range to the quantity of beacon sonac and influence of arrangement very large, therefore many as far as possible some beacon sensor of layout, in warranty test process, at least three the target sonacs be arranged on model can be directly detected signal by four or more beacon sonac.As Fig. 2 be remain silent test section arrange beacon sonac schematic diagram.
Three is receive in the remain silent model periphery of the internal face of test section or open jet working section of low-speed wind tunnel the real-time acoustic velocity measutement sensor sending integral type.Real-time acoustic velocity measutement sensor should match layout between two, and can not have any barrier thing between the real-time acoustic velocity measutement sensor of pairing when requiring test, ensures that sound wave can rectilinear propagation between two sonacs.If Fig. 3 is the schematic diagram of four groups of real-time acoustic velocity measutement sensors that test section is arranged of remaining silent.
Four is build model pose ultrasound measurement system, this system by primarily of computing machine (being equipped with high-speed data acquisition card etc.), the multiple beacon sonac being fixedly mounted on model periphery and many assembly to real-time acoustic velocity measutement sensor, be fixedly mounted on target sonac on model and corresponding software systems etc. and form.Beacon sonac, acoustic velocity measutement sensor and target sonac are powered by special accurate stabilized voltage supply.The composition frame chart of model pose ultrasound measurement system as shown in Figure 4.An accurate stabilized voltage supply is only provided in figure, can according to deployment scenarios multiselect with several during actual use.Target sonac power supply used can be fixed on mold cavity inside, and accurate stabilized voltage supply also can select the battery of multiple pressure stability etc. to substitute in addition.Software systems, as the core of model pose ultrasonic measurement, comprise User Interface, the parameter configuration data storehouse of all sonacs, in real time acoustic velocity measutement software, system calibration and calibration software and model pose measurement software etc.Computing machine is placed in wind tunnel operation control, and is connected by cable and beacon sonac, real-time acoustic velocity measutement sensor and target sonac etc.Computing machine is used for mouse beacon sonac, acoustic velocity measutement sensor and target sonac transmitting and receiving ultrasonic signal, the real-time velocity of sound of Measurement accuracy and from the accurate distance be transmitted between the sonac receiving ultrasonic signal, and is calculated the real-time pose parameter of model by related software.
Five is before the ultrasonic measurement of low-speed wind tunnel test model pose, should first calibrate system and demarcate.Calibration and demarcating when not drying when testing and preparing is carried out, and mainly comprises measuring the coordinate position of beacon sonac and calibration, the coordinate position of hard-wired all target sonacs on range determination between real-time acoustic velocity measutement sensor and calibration and test model that matches measure and calibration etc.As shown in Figure 5, it is made up of to straight line module, Y-direction straight line module, Z-direction straight line module and calibration sonac fixed support etc. X the Transfer rack of calibration and demarcation.Z-direction straight line module is two covers, wherein a set of outfit drive motor, another set of as auxiliary guiding, and the pedestal of two cover straight line modules is fixed on the upper and lower wallboard of test section, and the direction of motion vertical of its moving component is parallel with the Z-direction of the wind-tunnel system of axis.The pedestal two ends of Y-direction straight line module are separately fixed on the moving component of two cover Z-direction straight line modules, and the direction of motion of Y-direction straight line module moving component is parallel with the Y-direction of the wind-tunnel system of axis.X is fixed on the moving component of Y-direction straight line module to the pedestal of straight line module, and calibration sonac fixed support is fixed on X on straight line module moving component, and X is to the direction of motion of straight line module moving component and the X of the wind-tunnel system of axis to parallel.By computing machine control X, Y and the motion of Z-direction straight line module, just can realize being fixed on the calibration sonac X under the wind-tunnel system of axis on calibration sonac fixed support
w, Y
wand Z
wthe accurate location of coordinate components.
Transfer rack is utilized to adopt basic point calibration method to carry out to the calibration of the coordinate figure of beacon sonac and real-time acoustic velocity measutement sonac and demarcation.Namely utilize Transfer rack to control the accurate location of calibration sonac, and utilize supersonic sounding and Ce Bian space resection to obtain the accurate coordinate value of beacon sonac and real-time acoustic velocity measutement sonac.For the target sonac on model, its position adopts coordinate coincidence method to carry out calibrating and demarcating (not using Transfer rack).After being arranged on test section internal fixtion by model, by transit, optical clinometer or laser tracker etc. by the attitude angle (crab angle of model
Ψ, the angle of pitch
θand roll angle
Φ) adjust to 0 °, setting model reference point (model coordinate axle system initial point) overlaps with wind-tunnel system of axis initial point, then beacon sonac and target sonac is utilized to adopt Ce Bian space resection to obtain the coordinate of target sonac in the wind-tunnel system of axis, because the wind-tunnel system of axis and model coordinate axle system overlap, the wind-tunnel coordinate therefore measured is the coordinate that sensor of interest is fastened at model coordinate axle.
Before the test of each order of classes or grades at school or test gap, reply target sonac and beacon sensor demarcate.Demarcation utilizes transit, optical clinometer, laser tracker etc. as measuring basis, when not drying, target sonac and beacon sonac is utilized mutually to demarcate, and by ultrasonic measurement result compared with measuring basis, if there is error, found out the sonac that there is error by transformation model pose, re-use after then adopting certain method to revise its coordinate position.If error is comparatively large or be difficult to revise, can the sonac that there is deviation be marked, and will not be adopted in measurement subsequently.If find that the sonac quantity that there is deviation is more, the Ce Bian space resection of measuring and adopting cannot be met during warranty test, just should again be calibrated.
For the demarcation of the real-time acoustic velocity measutement sensor of pairing, 4 assembly can be utilized to demarcate mutually real-time acoustic velocity measutement sensor, namely measure the real-time velocity of sound simultaneously, if find that wherein one group has difference, just should not adopt its measurement data during test again.If find that wherein two groups of measurement data have bigger difference, just should be calibrated again.
Six is in process of the test, beacon sonac utilizes Ce Bian space resection to obtain the coordinate of more than 3 or 3 target sonacs in the wind-tunnel system of axis on model, recycle the coordinate conversion matrix that these target sonacs can obtain now model coordinate axle system and the wind-tunnel system of axis in model coordinate axle system, comprise rotation matrix
rand translation matrix
t, translation matrix
tnamely position (the x of model
0, y
0, z
0), then to rotation matrix
rsolve can obtain model attitude parameter (
Ψ,
θ,
Φ), so far obtain the pose parameter that low-speed wind tunnel test model is this moment complete.In concrete process of the test, according to test demand, model pose ultrasound measurement system completes model pose according to the instruction of wind-tunnel master control system and measures in real time and measurement result is fed back to wind-tunnel master control system at any time, thus completes the real-time measurement of low-speed wind tunnel model pose.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.
Claims (4)
1. a low-speed wind tunnel model pose ultrasound measurement system, is characterized in that comprising controller, accurate stabilized voltage supply, with the target sonac be connected with controller respectively by cable, beacon sonac and real-time acoustic velocity measutement sensor,
Described target sonac is fixedly installed on tested model, and target sonac is no less than four;
Described beacon sonac is fixedly installed on the internal face of low-speed wind tunnel test section, and beacon sonac is distributed in the surrounding of tested model, and beacon sonac is no less than four;
At least three target sonacs on described tested model can match with at least four beacon sonacs on wind-tunnel inwall;
Described real-time acoustic velocity measutement sensor is fixedly installed on the internal face of low-speed wind tunnel test section, and velocity of sound sonac is distributed in the surrounding of tested model in real time, described real-time velocity of sound sonac matches setting between two, without barrier thing between two real-time velocity of sound sonacs of pairing;
Above-mentioned all the sensors is the sonac receiving and send integral type,
Described controller is arranged in operation outside low-speed wind tunnel controls, and described accurate stabilized voltage supply is no less than one group, and target sonac accurate stabilized voltage supply used arranges and is that tested mold cavity is inner.
2. a kind of low-speed wind tunnel model pose ultrasound measurement system according to claim 1, is characterized in that described target sonac is arranged on tested model and is out of shape little position.
3. a kind of low-speed wind tunnel model pose ultrasound measurement system according to claim 2, is characterized in that described target sonac can not be arranged on the true origin of tested model coordinate axle system.
4. the Transfer rack for calibrating low-speed wind tunnel model pose ultrasound measurement system according to claim 1 and demarcate, it is characterized in that comprising X to straight line module, Y-direction straight line module, Z-direction straight line module, calibration sonac fixed support and controller
Described Z-direction straight line module is two covers, in the wainscot that the pedestal often overlapping Z-direction straight line module is separately fixed at test section and lower wall panels, described Z-direction straight line module is provided with moving component, the direction of motion vertical of moving component and parallel with the Z-direction of the wind-tunnel system of axis,
The pedestal two ends of described Y-direction straight line module are fixed on the moving component of two cover Z-direction straight line modules separately, and the direction of motion of the moving component on Y-direction straight line module is parallel with the Y-direction of the wind-tunnel system of axis,
Described X is fixed on the moving component of Y-direction straight line module to the pedestal of straight line module, and described calibration sonac fixed support is fixed on X on straight line module moving component, X to the direction of motion of straight line module moving component and the X of the wind-tunnel system of axis to parallel,
Described controller controls the moving component motion of each straight line module.
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|---|---|---|---|
| CN201520902248.7U CN205228770U (en) | 2015-11-13 | 2015-11-13 | Low speed wind tunnel model position appearance ultrasonic measurement system reaches and puts up its survey that moves of calibrating and maring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520902248.7U CN205228770U (en) | 2015-11-13 | 2015-11-13 | Low speed wind tunnel model position appearance ultrasonic measurement system reaches and puts up its survey that moves of calibrating and maring |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107607287A (en) * | 2017-09-01 | 2018-01-19 | 南京航空航天大学 | Three Degree Of Freedom automatic calibration device |
| CN109029904A (en) * | 2017-06-12 | 2018-12-18 | 中国空气动力研究与发展中心超高速空气动力研究所 | One kind separating Jet enterference experimental rig for hypersonic wind tunnel head body |
| CN110618293A (en) * | 2019-06-28 | 2019-12-27 | 中国空气动力研究与发展中心低速空气动力研究所 | Calibration method of cross hot-wire anemometer |
-
2015
- 2015-11-13 CN CN201520902248.7U patent/CN205228770U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109029904A (en) * | 2017-06-12 | 2018-12-18 | 中国空气动力研究与发展中心超高速空气动力研究所 | One kind separating Jet enterference experimental rig for hypersonic wind tunnel head body |
| CN109029904B (en) * | 2017-06-12 | 2023-08-15 | 中国空气动力研究与发展中心超高速空气动力研究所 | Be used for hypersonic speed wind tunnel head body separation jet interference test device |
| CN107607287A (en) * | 2017-09-01 | 2018-01-19 | 南京航空航天大学 | Three Degree Of Freedom automatic calibration device |
| CN110618293A (en) * | 2019-06-28 | 2019-12-27 | 中国空气动力研究与发展中心低速空气动力研究所 | Calibration method of cross hot-wire anemometer |
| CN110618293B (en) * | 2019-06-28 | 2021-07-13 | 中国空气动力研究与发展中心低速空气动力研究所 | Calibration method of cross hot-wire anemometer |
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Granted publication date: 20160511 Termination date: 20181113 |