CN106526225A - Single-frame particle imaging tachymeter suitable for high-speed flow filed and speed measurement method - Google Patents
Single-frame particle imaging tachymeter suitable for high-speed flow filed and speed measurement method Download PDFInfo
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- CN106526225A CN106526225A CN201610981886.1A CN201610981886A CN106526225A CN 106526225 A CN106526225 A CN 106526225A CN 201610981886 A CN201610981886 A CN 201610981886A CN 106526225 A CN106526225 A CN 106526225A
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- laser
- test window
- flow field
- high speed
- ccd camera
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/18—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the time taken to traverse a fixed distance
- G01P5/22—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the time taken to traverse a fixed distance using auto-correlation or cross-correlation detection means
Abstract
The invention aims to provide a single-frame particle imaging tachymeter suitable for a high-speed flow field and a speed measurement method. The single-frame particle imaging tachymeter includes a laser, a high-speed CCD camera, a synchronous controller, a particle generator, a sheet light source system, a test window and an image acquisition and analysis system, the synchronous controller is connected with the laser and the high-speed CCD camera, a test flow field is inside the test window, pulse laser generated by the laser is irradiated on the test window through the sheet light source system, the particle generator is connected with the test window, the high-speed CCD camera faces the test window, and the image acquisition and analysis system is connected with the high-speed CCD camera. The single-frame particle imaging tachymeter suitable for the high-speed flow field can well solve the problem of influence on measurement brought by the fact that a synchronizer is difficult to accurately control a pulse interval of a laser and a photographing interval of a high-speed CCD camera when a traditional PIV speed measurement system is applied to a high-speed flow field, and avoids the problem that related particles are searched from two images to perform speed calculation.
Description
Technical field
The present invention relates to a kind of particle image velocimetry device and method.
Background technology
Flow field is the space occupied by fluid motion, and flow field is widely used, and with the progress of science and technology, High Speed Flow Field gradually exists
Many technical fields are all related to, and for example jet plane jet pipe is exactly High Speed Flow Field.It is clear, accurately recognize High Speed Flow Field
In VELOCITY DISTRIBUTION in each interval, have important meaning with solve problem to studying a question, therefore be badly in need of a kind of for height
The global speed measuring instrument in fast flow field.
Initial flow field velocity test mainly, based on single-spot testing, has hot-wire anemometry and laser-Doppler speed
Mensuration, hot-wire anemometry are to be popped one's head in using the fine wire of an electrified regulation the most, are placed in institute's flow measurement field,
According to the heat dispersal situations of the wire in flow field of heat with the relation of flow field velocity measuring the speed in flow field, due to by wire
Probe is directly placed in flow field, and this method stream field has interference effect, it is impossible to the velocity information of accurate reactive flowfield, and
This kind of method is the VELOCITY DISTRIBUTION that spot measurement cannot show flow field from the overall situation.Laser-Doppler speed measuring method is by surveying
The Doppler signal of the trace particle of amount laser probe, obtains the value of speed further according to the relation of speed and Doppler frequency shift, by
Do not interfere with to measuring flow field in this mode, measurement is more accurate, but also belong to spot measurement and be unable to the reactive flowfield overall situation
Velocity information.For such case, the contactless Particle Image Velocimetry of whole flow field arises at the historic moment, this kind of Method And Principle
It is that trace particle is equably dispensed in flow field, determines Particles Moving speed by two width images of short time interval, and with
This replaces the VELOCITY DISTRIBUTION in flow field.But this method is when High Speed Flow Field is measured, need to shorten the photo opporunity of two width images, this
Requirement to controller in any case increases, find in two images in addition correlated particle carry out when speed is calculated also compared with
For complexity.This causes application of traditional Particle Image Velocimetry in High Speed Flow Field to be restricted.
The content of the invention
It is an object of the invention to provide in High Speed Flow Field be used for fluid transient, multiple spot, it is contactless under the conditions of one kind
Suitable for the single frames Particle Image Velocity instrument and its speed-measuring method of High Speed Flow Field.
The object of the present invention is achieved like this：
A kind of single frames Particle Image Velocity instrument suitable for High Speed Flow Field of the present invention, is characterized in that：Including laser instrument, high speed
Ccd video camera, isochronous controller, particle generator, sheet laser system, test window, IMAQ and analysis system, it is synchronous to control
Device difference connecting laser processed and high speed CCD camera, are test flow field, the pulse laser that laser instrument is produced inside test window
By sheet laser system irradiation on test window, particle generator connecting test window, high speed CCD camera is towards testing window
Mouth is arranged, and IMAQ is connected high speed CCD camera with analysis system.
A kind of single frames Particle Image Velocity method suitable for High Speed Flow Field of the present invention, is characterized in that：Using testing the speed as follows
Device：
Including laser instrument, high speed CCD camera, isochronous controller, particle generator, sheet laser system, test window, figure
As collection and analysis system, isochronous controller difference connecting laser and high speed CCD camera, it is test stream inside test window
, the pulse laser that laser instrument is produced passes through sheet laser system irradiation on test window, particle generator connecting test window,
High speed CCD camera is arranged towards test window, and IMAQ is connected high speed CCD camera with analysis system；
Laser instrument is controlled using isochronous controller, makes laser instrument send pulse laser, the pulse laser passes through sheet laser system
System forms sheet laser and is radiated at test window, and at the same time particle generator is constantly by test window to the filling of test flow field
Trace particle, controls high speed CCD camera using isochronous controller, and high speed CCD camera is by test window to testing flow field
The shooting of single-frame images is carried out, the pictorial information of shooting passes to IMAQ and analysis system, described image collection and analysis
System is realized using computer.
Advantage of the invention is that：The present invention can be very good the traditional PIV velocity-measuring systems of solution and apply in High Speed Flow Field
When, synchronized is difficult to the shadow that the pulse spacing of precise control laser instrument and the shooting interval of high speed CCD camera are brought to measurement
Ring, the particle that it also avoid from two width images finding correlation carries out the problem of speed calculating.The present invention can effectively measure height
The distribution situation of fast flow field medium velocity.
Description of the drawings
Fig. 1 is the structural representation of the present invention.
Specific embodiment
Illustrate below in conjunction with the accompanying drawings and the present invention is described in more detail：
With reference to Fig. 1, including isochronous controller 1, laser instrument 2, sheet laser system 3, particle generator 4, test window 5, height
Fast ccd video camera 6 and IMAQ and analysis system 7；Isochronous controller 1 controls laser instrument 2, makes laser instrument 2 send high intensity
Pulse laser, the laser forms sheet laser by sheet laser system 3 and is radiated at test window 5, at the same time particle generator 4
Trace particle is filled to test flow field by test window 5 constantly, high speed CCD camera 6 is also in the control of isochronous controller 1
The shooting of single-frame images is carried out down by test window 5 to High Speed Flow Field, the pictorial information of shooting passes to IMAQ and divides
Analysis system 7.
The principle of Particle Image Velocity method of the present invention：It is by the use of the pulse laser of high intensity as probe source, synchronous to control
Device processed 1 controls laser instrument 2, makes laser instrument 2 send the pulse laser of high intensity, and the laser of the cylindricality high intensity passes through sheet laser system
System 3 generates sheet laser and is radiated in test window 5.At the same time isochronous controller 1 control particle generator 4 make its constantly to
Trace particle is filled in tested High Speed Flow Field.It is due to being detected in High Speed Flow Field, synchronous in traditional PIV velocity-measuring systems
The precision of device is difficult to control to, and high speed CCD camera shoots the time interval of two width images and is difficult to control to, and is carrying out correlometer in addition
During calculation, the particle difficulty that correlation is found from two width images is larger.Isochronous controller 1 controls high-speed CCD photography in the method
Machine 6 carries out single-frame images shooting to High Speed Flow Field.The image for obtaining passes to IMAQ and analysis system 7.Entered according to image
Row analytical calculation, and then obtain the velocity field information of surveyed High Speed Flow Field.IMAQ adopts computer reality with analysis system 7
It is existing.
Claims (2)
1. a kind of single frames Particle Image Velocity instrument suitable for High Speed Flow Field, is characterized in that：Including laser instrument, high-speed CCD photography
Machine, isochronous controller, particle generator, sheet laser system, test window, IMAQ and analysis system, isochronous controller point
Other connecting laser and high speed CCD camera, are test flow field inside test window, and the pulse laser that laser instrument is produced passes through piece
Light-source system is radiated on test window, and particle generator connecting test window, high speed CCD camera are set towards test window
Put, IMAQ is connected high speed CCD camera with analysis system.
2. a kind of single frames Particle Image Velocity method suitable for High Speed Flow Field, is characterized in that：Using following speed measuring device：
Adopt including laser instrument, high speed CCD camera, isochronous controller, particle generator, sheet laser system, test window, image
Collection and analysis system, isochronous controller difference connecting laser and high speed CCD camera, are test flow field inside test window,
, by sheet laser system irradiation on test window, particle generator connecting test window is high for the pulse laser that laser instrument is produced
Fast ccd video camera is arranged towards test window, and IMAQ is connected high speed CCD camera with analysis system；
Laser instrument is controlled using isochronous controller, makes laser instrument send pulse laser, the pulse laser passes through sheet laser system shape
Test window is radiated at into sheet laser, at the same time particle generator constantly fills spike to test flow field by test window
Particle, controls high speed CCD camera using isochronous controller, and high speed CCD camera is carried out to testing flow field by test window
The shooting of single-frame images, the pictorial information of shooting pass to IMAQ and analysis system, described image collection and analysis system
Realized using computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610981886.1A CN106526225A (en) | 2016-11-09 | 2016-11-09 | Single-frame particle imaging tachymeter suitable for high-speed flow filed and speed measurement method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610981886.1A CN106526225A (en) | 2016-11-09 | 2016-11-09 | Single-frame particle imaging tachymeter suitable for high-speed flow filed and speed measurement method |
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| CN106526225A true CN106526225A (en) | 2017-03-22 |
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| CN201610981886.1A Pending CN106526225A (en) | 2016-11-09 | 2016-11-09 | Single-frame particle imaging tachymeter suitable for high-speed flow filed and speed measurement method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107290128A (en) * | 2017-08-23 | 2017-10-24 | 公安部天津消防研究所 | Stream condition tracer and experimental method at a kind of compartment window |
| CN107782288A (en) * | 2017-09-22 | 2018-03-09 | 北京空间机电研究所 | The method of atmospheric perturbation formula optical monitoring aircraft based on background schlieren imaging |
| CN108344652A (en) * | 2018-01-22 | 2018-07-31 | 西安热工研究院有限公司 | A kind of rebounding characteristic test system of subparticle high-speed impact runner wall surface |
| CN108387363A (en) * | 2018-03-08 | 2018-08-10 | 重庆交大国科航科技有限公司 | A kind of water cavity pilot system |
| CN108931388A (en) * | 2018-05-28 | 2018-12-04 | 佛山市日日圣科技有限公司 | For detecting the test macro of air purifier |
| CN109297671A (en) * | 2018-07-27 | 2019-02-01 | 中国商用飞机有限责任公司 | Particle image velocimetry experimental rig for aircraft passenger compartment air flow field FLOW VISUALIZATION |
| CN109612682A (en) * | 2018-12-24 | 2019-04-12 | 上海理工大学 | A kind of jet stream movement measuring device in scaled model based on PIV |
| CN109946478A (en) * | 2019-03-24 | 2019-06-28 | 北京工业大学 | A kind of detection system for the Aerostatic Spindle internal gas flow velocity |
| CN109974969A (en) * | 2019-04-25 | 2019-07-05 | 扬州大学 | A kind of pulsed for particle image velocimetry floods impact jet flow experimental provision and its speed-measuring method |
| CN110542650A (en) * | 2019-07-19 | 2019-12-06 | 华南理工大学 | multifunctional steel ball impact device for detecting impact resistance of vehicle body coating |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107290128A (en) * | 2017-08-23 | 2017-10-24 | 公安部天津消防研究所 | Stream condition tracer and experimental method at a kind of compartment window |
| CN107290128B (en) * | 2017-08-23 | 2023-12-01 | 公安部天津消防研究所 | Air flow state tracing device at carriage window and experimental method |
| CN107782288B (en) * | 2017-09-22 | 2020-02-11 | 北京空间机电研究所 | Method for monitoring aircraft through atmosphere disturbance type optics based on background schlieren imaging |
| CN107782288A (en) * | 2017-09-22 | 2018-03-09 | 北京空间机电研究所 | The method of atmospheric perturbation formula optical monitoring aircraft based on background schlieren imaging |
| CN108344652A (en) * | 2018-01-22 | 2018-07-31 | 西安热工研究院有限公司 | A kind of rebounding characteristic test system of subparticle high-speed impact runner wall surface |
| CN108387363A (en) * | 2018-03-08 | 2018-08-10 | 重庆交大国科航科技有限公司 | A kind of water cavity pilot system |
| CN108931388A (en) * | 2018-05-28 | 2018-12-04 | 佛山市日日圣科技有限公司 | For detecting the test macro of air purifier |
| CN109297671A (en) * | 2018-07-27 | 2019-02-01 | 中国商用飞机有限责任公司 | Particle image velocimetry experimental rig for aircraft passenger compartment air flow field FLOW VISUALIZATION |
| CN109612682A (en) * | 2018-12-24 | 2019-04-12 | 上海理工大学 | A kind of jet stream movement measuring device in scaled model based on PIV |
| CN109946478A (en) * | 2019-03-24 | 2019-06-28 | 北京工业大学 | A kind of detection system for the Aerostatic Spindle internal gas flow velocity |
| CN109974969A (en) * | 2019-04-25 | 2019-07-05 | 扬州大学 | A kind of pulsed for particle image velocimetry floods impact jet flow experimental provision and its speed-measuring method |
| CN109974969B (en) * | 2019-04-25 | 2024-02-13 | 扬州大学 | Pulse type submerged impact jet flow experimental device for particle image velocimetry and velocimetry method thereof |
| CN110542650A (en) * | 2019-07-19 | 2019-12-06 | 华南理工大学 | multifunctional steel ball impact device for detecting impact resistance of vehicle body coating |
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