CN109000882A - A kind of reality waters flow field PIV measuring system and measurement method - Google Patents
A kind of reality waters flow field PIV measuring system and measurement method Download PDFInfo
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- CN109000882A CN109000882A CN201810855313.3A CN201810855313A CN109000882A CN 109000882 A CN109000882 A CN 109000882A CN 201810855313 A CN201810855313 A CN 201810855313A CN 109000882 A CN109000882 A CN 109000882A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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Abstract
A kind of reality waters flow field PIV measuring system and measurement method, be related to real waters flow field survey with ship experimental test field.Measuring system includes laser probe, direction blade, high speed camera, hydraulic motor, damping flow direction mark, power supply and control system, telescopic hydraulic cylinder, optical fiber, synchronizer, data acquisition and signal processing computer, fixed bracket, turntable, aggravates tripod mount, laser sheet optical, measured zone；Fixed that laser probe, direction blade, high speed camera, hydraulic motor, damping flow direction mark, power supply and control system, telescopic hydraulic cylinder, optical fiber and turntable are fixed on and are aggravated on tripod mount with bracket, data acquisition connect synchronizer on lash ship by optical fiber with signal processing computer.Applicability of the present invention is extensive, and the depth of adjustable institute's flow measurement field and direction, provides effective measurement method for flow behavior around research practical waters seabed turbulence characteristic and other structures object, special geomorphology.
Description
Technical field
The present invention relates to real waters flow field survey and with ship experimental test field, and in particular to a kind of reality waters flow field PIV
Measuring system and measurement method.
Background technique
Real sea area seafloor structure facility, seabed special geomorphology region flow field, the modeling of utilizing ocean current, silt transport, dirt
The diffusion of dye object and biology are migrated dependent on the understanding to turbulence characteristics near seabed.In real sea area, momentum and the conservation of energy are by very
Multifactor impact, wherein bottom shear stress and dissipation rate influence great.Bottom shear stress directly affects circulation, generates turbulent flow,
Dissipation rate is the controlling mechanism of entire turbulence energy budget.Various ways were attempted to real sea area flow field survey, it is some of
It is related to directly measuring, other then depend on the velocity profile or turbulence characteristics of hypothesis.It is Doppler's flow velocity section plotter, that is, ADCP, more
General sillometer, that is, ADV, electromagnetic current metre and the LDV of strangling is the several method for measuring turbulent flow eddy stress.However, since these are to produce
The single point measuring technique of raw time series data, people frequently encounter tired during the non-stationary flow that fluctuation generates mutually separates
It is difficult.
Summary of the invention
It is an object of the invention to solve the problems, such as that above-mentioned measuring technique non-stationary flow mutually separates difficulty, the present invention provides one
Kind adapts to the real waters flow field PIV measuring system and measurement method of practical water bottom flow field survey demand.
The object of the present invention is achieved like this:
A kind of reality waters flow field PIV measuring system, including laser probe 1, direction blade 2, high speed camera 3, hydraulic motor
4, damping flow direction mark 5, power supply and control system 6, telescopic hydraulic cylinder 7, optical fiber 8, synchronizer 9, data acquisition and signal processing electricity
Brain 11, fixed bracket 12, turntable 13, exacerbation tripod mount 14, laser sheet optical 15, measured zone 16；Fixed bracket
Laser probe 1, direction blade 2, high speed camera 3, hydraulic motor 4, damping flow direction are marked 5, power supply and control system 6, stretched by 12
Hydraulic cylinder 7, optical fiber 8 and turntable 13, which are fixed on, to be aggravated on tripod mount 14, and data acquisition passes through with signal processing computer 11
Optical fiber 8 connects synchronizer 9 on lash ship 10.
The data acquisition issues laser sheet optical 15 by controlling laser microprobe 1 by optical fiber 8 with signal processing computer 11
It takes pictures with high speed camera 3.The power supply and control system 6 are that hydraulic motor 4 provides electric power, control damping flow direction mark 5, flexible liquid
Cylinder pressure 7 and turntable 13.
The measured zone 16 is located in 15 range of exposures of laser sheet optical, and is rectangular area.The laser probe 1 has two
A, the laser sheet optical 15 of sending has two beams, and there are two corresponding measured zones 16.The high speed camera 3 has two, and camera is differentiated
Rate is 2048 × 2048px.Height of the telescopic hydraulic cylinder 7 in complete compression is 2.5m, and the height in complete elongation is
10m.It is 360 ° that the turntable 13, which rotates angle,.
A kind of reality waters flow field PIV measurement method, comprising the following steps:
(1) before experiment starts, lash ship is rested in into waters to be measured, in lash ship first in the class by PIV measuring system by fixing use
Bracket, which is fixed on, to be aggravated on tripod mount, and debugging laser demarcates sample measurement region and tests measuring system watertightness；
(2) after the debugging of measuring system deck, measuring system is hung to sea area seabed to be measured by lash ship lowering equipment；
(3) by tripod mount a certain position into the water, pass through the laser sheet optical that direction blade and laser probe issue
Angle feed-back, using data acquisition with signal processing computer issue signal, control turntable and hydraulic motor rotation and go up and down
Find systematic survey position accurately；
(4) after measurement position determines, signal is issued with signal processing computer using data acquisition, is transferred to by synchronizer
Laser, laser issue laser and are transferred to laser probe via optical fiber, and laser probe issues laser sheet optical, while high speed camera
Start to shoot photo, the data of acquisition are transferred to data analysis system and are handled；
(5) flow field at different depth is measured by adjusting the length of telescopic hydraulic cylinder, rotation turntable adjusts institute's flow measurement
The direction of field is completed at different depth, the experiment of the flow field survey of different directions.
By the adjusting of laser probe and high speed camera angle position, this system has 2 dimensional plane, 2 direction speed and 2 dimensions flat
Two kinds of flow field survey schemes of 3 direction speed of face.
The beneficial effects of the present invention are:
Compared with prior art, there is no a set of underwater PIV system dresses for being suitable for real waters flow field survey for the prior art
It sets and measurement method.The present invention is suitable for the especially practical water bottom flow field survey demand in real waters, fathoms in experiment
It can be controlled by adjusting hydraulic telescopic rod, different directions flow field survey can be adjusted by rotating table, and entire survey
Amount system, which is fixed on, to be aggravated on tripod mount, and measuring system is using ship as carrier.Meanwhile this measuring system is equally applicable to sea
The waters flow field surveys such as bottom structure object facility, seabed special geomorphology region flow field, harbour, inland river and lake.In addition, passing through installation
This measuring system can also measure flow field near marine structure, real scale ship after fixed device.
Detailed description of the invention
Fig. 1 is a kind of system front view of reality waters flow field PIV measurement；
A kind of system top view of reality waters flow field PIV measurement of Fig. 2；
Fig. 3 is a kind of system side view of reality waters flow field PIV measurement.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing.
As shown in Figure 1, 2, 3, the system of one of present invention reality waters flow field PIV measurement includes laser probe 1, direction
It is blade 2, high speed camera 3, hydraulic motor 4, damping flow direction mark 5, power supply and control system 6, telescopic hydraulic cylinder 7, optical fiber 8, synchronous
Device 9, data acquisition and signal processing computer 11, fixed bracket 12, turntable 13, exacerbation tripod mount 14, laser sheet optical
15, measured zone 16.Data acquisition is used to control laser microprobe 1 with signal processing computer 11 and issues laser sheet optical 15 and high speed phase
Machine 3 is taken pictures.Power supply and control system 6 are that hydraulic motor 4 provides electric power, control damping flow direction mark 5, telescopic hydraulic cylinder 7 and rotation
Platform 13.It is fixed with bracket 12 by laser probe 1, direction blade 2, high speed camera 3, hydraulic motor 4, damping flow direction mark 5, power supply and
Control system 6, telescopic hydraulic cylinder 7, optical fiber 8 and turntable 13, which are fixed on, to be aggravated on tripod mount 14.
Before experiment starts, lash ship 10 is rested in into waters to be measured, by PIV measuring system by fixing with branch in lash ship overtime work
Frame 12, which is fixed on, to be aggravated to debug laser on tripod mount 14, and calibration sample measurement region 16 is gone forward side by side measuring system
Watertightness test.In addition, passing through the adjusting of laser probe and high speed camera angle position, 2 dimensional plane, 2 side is may be implemented in this system
To two kinds of flow field survey schemes of speed and 2 dimensional plane, 3 direction speed.Corresponding measurement scheme is carried out according to when time test demand
Selection and setting.After the debugging of measuring system deck, measuring system is hung to sea area seabed to be measured by lash ship lowering equipment.It will
The a certain position into the water of tripod mount 14, by the angle feed-back of direction blade 2 and laser sheet optical, using data acquisition with
Signal processing computer 11 issues signal, control turntable 13 and the rotation of hydraulic motor 4 and goes up and down to reach systematic survey position
Demand.After the completion of measurement position adjustment, signal is issued with signal processing computer 11 using data acquisition, is transmitted by synchronizer 9
Laser is issued to laser and is transferred to the sending laser sheet optical 15 of laser probe 1 via optical fiber 8, while high speed camera 3 starts to shoot
Photo, the data of acquisition are transferred to data analysis system and are handled.Then it is measured by adjusting the length of telescopic hydraulic cylinder 7
Flow field at different depth rotates turntable 13, adjusts the direction of institute's flow measurement field, completes at different depth, the flow field of different directions
Measurement experiment.
PIV provides instantaneous distribution of two velocity components in a sample areas, and recursive measurement is to obtain
Turbulent flow statistical data.PIV system is widely used in the regions such as ship, propeller wake field flow field survey.Therefore, it is based on
The basic principle of PIV flow field survey, the present invention propose a kind of real waters flow field PIV measuring system, will be micro- in practical water environment
Small impurity and biology are as necessary trace particle in PIV measurement, to real sea area seafloor structure facility, seabed special geomorphology area
The waters such as domain flow field, harbour, inland river and lake flow field survey, for research practical waters seabed turbulence characteristic and other structures
Flow behavior provides effective measurement method around object, special geomorphology.
Claims (10)
1. a kind of reality waters flow field PIV measuring system, it is characterised in that: measuring system includes laser probe (1), direction blade
(2), high speed camera (3), hydraulic motor (4), damping flow direction mark (5), power supply and control system (6), telescopic hydraulic cylinder (7), light
Fine (8), synchronizer (9), data acquisition and signal processing computer (11), fixed bracket (12), turntable (13), three feet of exacerbation
Frame pedestal (14), laser sheet optical (15), measured zone (16)；Fixed bracket (12) by laser probe (1), direction blade (2),
High speed camera (3), hydraulic motor (4), damping flow direction mark (5), power supply and control system (6), telescopic hydraulic cylinder (7), optical fiber (8)
It is fixed on and is aggravated on tripod mount (14) with turntable (13), data acquisition passes through optical fiber (8) with signal processing computer (11)
Synchronizer (9) are connected on lash ship (10).
2. a kind of real waters flow field PIV measuring system according to claim 1, it is characterised in that: the data acquisition with
Signal processing computer (11) is by issuing laser sheet optical (15) and high speed camera (3) bat by optical fiber (8) control laser microprobe (1)
According to.
3. a kind of real waters flow field PIV measuring system according to claim 1, it is characterised in that: the power supply and control
System (6) is that hydraulic motor (4) provide electric power, control damping flow direction mark (5), telescopic hydraulic cylinder (7) and turntable (13).
4. a kind of real waters flow field PIV measuring system according to claim 1, it is characterised in that: the measured zone
(16) it is located in laser sheet optical (15) range of exposures, and is rectangular area.
5. a kind of real waters flow field PIV measuring system according to claim 1, it is characterised in that: the laser probe (1)
There are two, the laser sheet optical (15) of sending has two beams, and there are two corresponding measured zones (16).
6. a kind of real waters flow field PIV measuring system according to claim 1, it is characterised in that: the high speed camera (3)
There are two, camera resolution is 2048 × 2048px.
7. a kind of real waters flow field PIV measuring system according to claim 1, it is characterised in that: the telescopic hydraulic cylinder
(7) height in complete compression is 2.5m, and the height in complete elongation is 10m.
8. a kind of real waters flow field PIV measuring system according to claim 1, it is characterised in that: the turntable (13)
Rotating angle is 360 °.
9. a kind of reality waters flow field PIV measurement method, which comprises the following steps:
(1) before experiment starts, lash ship is rested in into waters to be measured, in lash ship first in the class by PIV measuring system by fixed bracket
It is fixed on and aggravates on tripod mount, debugging laser demarcates sample measurement region and tests measuring system watertightness；
(2) after the debugging of measuring system deck, measuring system is hung to sea area seabed to be measured by lash ship lowering equipment；
(3) by tripod mount a certain position into the water, pass through the angle for the laser sheet optical that direction blade and laser probe issue
Degree feedback issues signal using data acquisition and signal processing computer, and control turntable is rotated with hydraulic motor and found accurately with lifting
Systematic survey position；
(4) after measurement position determines, signal is issued with signal processing computer using data acquisition, laser is transferred to by synchronizer
Device, laser issue laser and are transferred to laser probe via optical fiber, and laser probe issues laser sheet optical, while high speed camera starts
Photo is shot, the data of acquisition are transferred to data analysis system and are handled；
(5) flow field at different depth is measured by adjusting the length of telescopic hydraulic cylinder, rotation turntable adjusts institute's flow measurement field
Direction is completed at different depth, the experiment of the flow field survey of different directions.
10. a kind of real waters flow field PIV measurement method according to claim 9, it is characterised in that: by laser probe with
The adjusting of high speed camera angle position, this system have two kinds of flow fields of 2 dimensional plane, 2 direction speed and 2 dimensional plane, 3 direction speed to survey
Amount scheme.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810855313.3A CN109000882A (en) | 2018-07-31 | 2018-07-31 | A kind of reality waters flow field PIV measuring system and measurement method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810855313.3A CN109000882A (en) | 2018-07-31 | 2018-07-31 | A kind of reality waters flow field PIV measuring system and measurement method |
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| CN109000882A true CN109000882A (en) | 2018-12-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110440766A (en) * | 2019-08-13 | 2019-11-12 | 陕西煤业化工技术研究院有限责任公司 | A kind of water-bearing layer hydrogeological parameter measuring device and method |
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Patent Citations (5)
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| CN203464931U (en) * | 2013-08-26 | 2014-03-05 | 国家海洋局第二海洋研究所 | Near-distance detection device for seabed landform |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110440766A (en) * | 2019-08-13 | 2019-11-12 | 陕西煤业化工技术研究院有限责任公司 | A kind of water-bearing layer hydrogeological parameter measuring device and method |
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Application publication date: 20181214 |