CN107891946A - The trigger signal that ship stern flow fields PIV is measured in wave is moved from trigger device and measuring method by ship - Google Patents
The trigger signal that ship stern flow fields PIV is measured in wave is moved from trigger device and measuring method by ship Download PDFInfo
- Publication number
- CN107891946A CN107891946A CN201711078267.2A CN201711078267A CN107891946A CN 107891946 A CN107891946 A CN 107891946A CN 201711078267 A CN201711078267 A CN 201711078267A CN 107891946 A CN107891946 A CN 107891946A
- Authority
- CN
- China
- Prior art keywords
- signal
- piv
- ship
- wave
- heave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B71/00—Designing vessels; Predicting their performance
-
- 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
-
- 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
- G01P5/20—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 particles entrained by a fluid stream
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The present invention provides the trigger signal that ship stern flow fields PIV is measured in a kind of wave and moved by ship from trigger device and measuring method,Including PIV data acquisitions and signal adjustment computer,Laser sensor,PIV measuring systems,Laser signal receives and signal trigger flag plate,Signal synchronizer,Movement of ship model heaves bar and pitch angular shaft encoder,Pitch angular shaft encoder is arranged on ship model,Movement of ship model heave bar is arranged on above pitch angular shaft encoder,Laser signal receives to be arranged on movement of ship model heave bar with signal trigger flag plate,Signal triggering passage is formed when the laser light signal of laser transmitter projects passes through the silver color mark line on mark plate,Trigger signal is sent to synchronizer,Synchronizer receives by the signal that pitching and heave movement are sent and triggers PIV flow field survey systems,PIV measuring systems are started working and gather picture.The present invention triggers interference and movement position problem asynchronous with measurement position to avoid artifactual epochs.
Description
Technical field
Moved the present invention relates to the trigger signal that ship stern flow fields PIV in a kind of wave is measured from trigger device by ship and
Measuring method, belong to ship test flow field survey field.
Background technology
Ship is in the design process, extremely important on posture of the ship in wave and performance study.For research ship
Propulsive performance of the oceangoing ship in wave, the flow field velocity of propeller disk when necessary measurement ship navigates by water in wave.Pi Tuo
Three kinds as measurement and the acquisition in current details flow field of pipe, LDV (Single-point velocity determination technology) and PIV (particle image velocimetry method)
Usual way, with the development of laser and image processing techniques, LDV gradually instead of with PIV treat flow measurement field have contact do
The Pitot tube disturbed.Spot measurement compared to LDV, obtained for carrying out the region flow field survey PIV such as ship, propeller wake field
The extensive use of a large amount of scholars.Vehicle mounted type PIV systems are also widely used in measurement ship model when being navigated by water in towing basin
Flow field, however, traditional vehicle mounted type PIV systems can not but apply measurement ship model flow field change under the wave action.Therefore,
It is necessary that design a kind of trigger signal of the measurements of the ship stern flow fields PIV suitable for wave is moved from trigger device by ship.
PIV measures the trigger device of ship stern flow fields in wave proposed by the present invention, can measure ship in wave under heave movement
Tail flow field, provide effective measuring method for the measurement of ship stern flow fields in wave.
The content of the invention
The invention aims to provide the trigger signal that ship stern flow fields PIV is measured in a kind of wave to be moved by ship
From trigger device and measuring method.
The object of the present invention is achieved like this：The trigger signal that ship stern flow fields PIV is measured in wave is moved by ship
From trigger device, it is characterised in that：Including PIV data acquisitions and signal adjustment computer, laser sensor, PIV measuring systems, swash
Optical signal receives heaves bar and pitch angular shaft encoder with signal trigger flag plate, signal synchronizer, movement of ship model, described vertical
Cradle angle degree shaft encoder is arranged on ship model, and the movement of ship model heave bar is arranged on above pitch angular shaft encoder, described
Laser signal receives to be arranged on movement of ship model heave bar with signal trigger flag plate, and laser signal receives and signal trigger flag
Plate is black background plate, and the silver color mark line of at least three rows is provided with black background plate, and the PIV measuring systems include
PIV lasers and two cameras, signal triggering is formed when the laser light signal of laser transmitter projects passes through silver color mark line
Path, trigger signal are sent to synchronizer, and synchronizer receives the signal sent by pitching and heave movement and triggering
PIV flow field survey systems, the PIV lasers of PIV measuring systems and two cameras are started working and gather picture.
Present invention additionally comprises some such architectural features：
1. the trigger signal that ship stern flow fields PIV is measured in wave is moved the measuring method from trigger device, tool by ship
Body includes four-stage：
One, tests the preparatory stage
(a) determine that the spacing of silver color mark line and pitch angular axle encode on mark plate according to the wave height of experiment wave operating mode
The characteristic angle of device；
(b) installation site of movement of ship model heave bar is determined according to the position to be measured ship section, is protected during installation
Demonstrate,prove movement of ship model heave bar and horizontal plane；
(c) laser sensor, PIV data acquisitions and signal are adjusted into computer, angle shaft encoder respectively with synchronizer to connect
Connect, silver color mark line is in crest, trough and laser sensor and form loop and produce signal
Two, test adjustment stages
(a) trailer rests in pond middle section position, and measuring system is debugged under the conditions of carrying out no speed of a ship or plane；
(b) trailer, which blows a whistle to dispatch a car, makes ripple indication signal, makes the corresponding wave operating mode of ripple room laboratory technician progress and makes ripple；
(c) wave is transferred to ship model position and interacted with model, and heave, pitching occur for ship, and respectively
Carry out pure heave movement state measurement debugging, the debugging of pure pitching state measurement and heave, pitching coupled motions debugging.
(d) whether inspection system loop is unimpeded, and whether markings spacing and pitch axis encoder feature angle are correct；
Three, experimental stages
(a) tested under the conditions of pure heave：Wave maker manufactures wave, and ship model to be measured is navigated by trailer with fixing speed of a ship or plane traction
OK, wave produces pure heave movement with ship model interaction, and heave movement makes silver color markings form loop with laser sensor
And excitation signal is transmitted into synchronizer, the PIV that synchronizer progress signal transacting and transmission signal are synchronized to PIV measuring systems swashs
Light device and two cameras, PIV lasers launch laser sheet optical and the figure in the region to be measured of ship model are mutually entered by two cameras simultaneously
Row shooting, record wave in ship model to be measured this moment position when PIV data；
(b) tested under the conditions of pure pitching：The wave of wave maker manufacture produces pure pitching with ship model to be measured interaction,
Pitching reaches characteristic angle and excites pitching signal to transmit signals to synchronizer, synchronizer through pitch angular shaft encoder
Carry out signal transacting and transmission signal is synchronized to the PIV lasers and two cameras of PIV measuring systems, the transmitting of PIV lasers swashs
Mating plate light and the figure in the region to be measured of ship model is mutually shot by two cameras simultaneously, record in wave ship model to be measured position this moment
PIV data when putting；
(c) heave, the experiment of pitching coupling condition：Wave and the ship model to be measured interaction of wave maker manufacture produce pitching and
Heave movement, pitching reach characteristic angle and excite pitching signal to transmit signals to synchronization through pitch angular shaft encoder
Device, heave movement make silver color markings be transmitted into synchronizer with laser sensor composition loop excitation signal, and synchronizer carries out coupling
Close signal transacting and launch and meet that signal is synchronized to the laser and two cameras of PIV measuring systems jointly, PIV lasers hair
Penetrate laser sheet optical and the figure in the region to be measured of ship model mutually shot by two cameras simultaneously, record wave in ship model to be measured this
Carve PIV data during position；
Four, experimental data processing stages
(a) carry out PIV flow fields data processing under pure heave, pure pitching and heave, pitching coupled motions respectively, and with phase
Answer under Test Cycle wave peak-to-valley value and wave phase etc. to carry out position correspondence, formed ship stern flow fields transient state under wave condition,
Average, time, the flow field such as averagely was for further ship and impeller design and optimization application.
Compared with prior art, the beneficial effects of the invention are as follows：Prior art, which does not have, a set of is applied to towing basin water
Lower PIV measuring systems carry out having supporting measuring method with ship stern flow fields measurement signal automatic initiating device under wave state.
The present invention is applied to carry out with ship stern flow fields measurement experiment under wave state based on the underwater PIV measuring systems of towing basin,
Risen in ship wave under PIV measuring systems laser can be acted on from IMAQ camera by different wave operating modes in experiment
Heavy, pitching independent triggers or coupling triggering.PIV measuring systems can measure ship in ripple after being triggered by Ship Motion Attitude
The researchers such as pitching effect lower crest, half crest, equilbrium position, half trough and trough are risen in wave
The arbitrary motion moment transient state that needs, time is average and the tail flow field of phase average, is the measurement of ship stern flow fields in wave
Effective PIV measurement signals triggering and measuring method automatically are provided, artifactual epochs is avoided and triggers interference and movement position
Problem asynchronous with measurement position.
Brief description of the drawings
Fig. 1 is that a kind of signal that underwater PIV ship wakes field measurement is pulled suitable for wave is automatic tactile by ship motion
Transmitting apparatus is connected front view with system；
Fig. 2 is that PIV tail flow fields measure quarter partial enlarged drawing in wave；
Fig. 3 be a kind of signal that underwater PIV ship wakes field measurement is pulled suitable for wave by ship heave movement from
Driven triggering device partial enlarged drawing；
Fig. 4 be a kind of signal that underwater PIV ship wakes field measurement is pulled suitable for wave by ship pitching from
Driven triggering device partial enlarged drawing；
Fig. 5 is that a kind of signal that underwater PIV ship wakes field measurement is pulled suitable for wave is automatic tactile by ship motion
Transmitting apparatus signal transmission figure；
In figure：1.PIV data acquisitions and signal adjustment computer, 2. signal synchronizers, 3. laser sensors, 4. mark plates,
5. laser light signal, the main bridge of 6. trailers, 7. heave bars, 8. waves, 9. ship models to be measured, 10.PIV lasers, 11.PIV laser hair
Penetrate head, No. 12.1 PIV cameras, No. 13.2 PIV cameras, 14. laser sheet opticals, 15.PIV measuring systems, 16. pitch angular axles coding
Device, 17. connecting plates, 18. hull fixed plates, 19.PIV camera shooting areas, 20. mark plate black plate bodys, 21. mark plate silver color
Markings, 22. ship heave movements, 23. pitchings, 24. pitching locking devices.
Embodiment
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings.
As shown in Fig. 1,2,3,4,5, the present invention include PIV data acquisition and signal adjust computer (1), one it is synchronous
Device (2), a laser sensor (3), a mark plate (4), a heave bar (7), a pitch angular shaft encoder (16)
With a set of PIV measuring systems (15).PIV data acquisitions are used for setting pitch angular boat encoder with signal adjustment computer (1)
(16) calculating at silver color mark line interval (21) and PIV measuring systems on mark plate (4) on characteristic angle, heave bar (7)
(15) data analysis and storage of collection.Synchronizer (2) carries out the automatic trigger signal of heave movement (22), pitching (23) certainly
The synchronization of dynamic trigger signal, PIV lasers (10) signal and PIV cameras (12) (13) signal.Laser sensor (3), which is fixed on, to be dragged
Laser light signal (5) can be sent on car owner's bridge (6).Mark plate (4) is by mark plate black plate body (20) and mark plate silver color mark
Will line (21) forms.Pitch angular shaft encoder (16) is connected with connecting plate (17), connecting plate and ship model hull fixed plate (18)
Connection, pitching locking device (24) can pin pitching (23) and realize only heave movement (22) PIV flow field surveys.PIV is surveyed
Amount system (15) includes PIV lasers (10), laser beam emitting head (11) and camera (12) (13).The signal trigger device includes
Laser sensor and laser signal receive and signal trigger flag plate and movement of ship model heave bar and pitch angular shaft encoder.
Laser sensor transmits signals to PIV measuring systems for launching laser to mark plate and being formed in signal after path, heaves bar
Ship afterbody is fixed on, synchronous with ship that heave movement is carried out after by wave action, pitch angular shaft encoder is used for recording boat
Oceangoing ship pitch angular and by the automatic trigger signal of ship pitching to synchronizer.Mark plate is arranged on fook, for receiving
The laser light signal of laser transmitter projects.Mark plate uses black background, and being equipped with three or a plurality of on plate, (bar number depends on measurement
Motion or time interval quantity) silver color mark line at equal intervals.The line of silver color is used for receiving the optical signal of laser sensor transmission,
Signal triggering passage is formed when laser light signal passes through silver color mark line.Trigger signal is sent to synchronizer, and synchronizer connects
Receive the signal that pitching is sent with heave movement and trigger PIV flow field survey systems.PIV measures laser system
System, which is started working, gathers picture.The present invention is applied to have the PIV ship wakes field measurement experiment under wave state, being capable of surveying vessel
Oceangoing ship rises the tail flow field under pitching in wave, and effective measuring method is provided for the measurement of ship stern flow fields in wave.
The triggering form of signal trigger device is to realize that triggering, wave parameter etc. change automatically by the heave of ship, pitching
Trigger device is moved by ship and changed automatically after change, without artificial regulation.The triggering of signal trigger device can independently can coupling
Close, triggering mode is 1) wave make ship occur lifting campaign, lifting campaign act on heaves bar on, heave bar change in location
The laser of silver wire and trigger device is set to form path, the pulse laser and camera for triggering PIV systems are started working, and record wave
Middle ship this moment position when PIV data.2) wave makes ship that pitching occur, and pitching is acted on ship, makes ship
Angle change, encoder record different angle moment coding information, according to initially setting up spy occur for oceangoing ship pitch angular shaft encoder
Assemble-publish code angle sends TTL signal, and the pulse laser and camera for triggering PIV systems are started working, and records in wave ship this moment
PIV data during position.3) wave makes ship that heave, pitching occur.Heave movement is acted on heave bar, is shaken motion and is made
With on pitch angular shaft encoder.Heave bar change in location makes the laser of silver wire and trigger device form path, encoder
Record different angle moment coding information.Heaving Signal trigger device is sent to synchronizer with pitching signal trigger device signal
On, synchronizer according to initially set up feature coding angle, movement position deep with feature carry out coupling it is synchronous, meet both
Send TTL signal during common prescription, the pulse laser and camera for triggering PIV systems are started working, and record in wave ship this moment
PIV data during position.Installation site of the mark plate on heave bar meet, middle silver wire position and laser on mark plate
In the same horizontal line.It is vertical with horizontal level to heave bar, according to different measurement sections, may be arranged at shipping stempost, sternpost and
Ship center of gravity.The spacing of mark plate silver color markings can need to adjust with quantity according to measurement, with realize different measurement positions,
The measurement request in cycle.Pitch angular shaft encoder can carry out individual features according to wave parameter and ship seakeeping experiment
Angle is set, to realize different measurement positions, the measurement request in cycle.
(21) spacing of silver wire on mark plate and pitch angular shaft encoder were determined according to experiment wave height first before on-test
(16) characteristic angle, mark plate (4) a certain position on heave bar (7) has been fixed on then, further according to measured section
Position determine installation site, pay attention to heaving bar (7) and horizontal plane during installation.Then by laser sensor (3), PIV
Data acquisition is connected with signal adjustment computer (1), angle shaft encoder (16) and synchronizer (2), and regulating system is set, and makes silver wire
Loop is formed with laser sensor in crest, trough (during equilbrium position) and produce signal, in addition, pitch angular shaft encoder
Angle, which is at characteristic angle, also forms loop generation signal.After the completion of system debug, experimental test is carried out.Wave maker manufactures ripple
Unrestrained (8), ship model (9) to be measured is by the main bridge of trailer (6) to fix speed of a ship or plane towing voyage.Wave (8) produces with ship model (9) interaction
Pitching (23) and heave movement (22), pitching reach characteristic angle and excite the automatic trigger circuit of pitching signal and launch
For signal to synchronizer (2), it is synchronous that heave movement makes markings (21) be transmitted into laser sensor (3) composition loop excitation signal
Device, synchronizer carry out coupled signal processing, transmitting meet jointly signal be synchronized to the lasers (10) of PIV measuring systems (15) with
Camera (12) (13).Laser transmitting laser sheet optical (14) and simultaneously camera carry out region (19) figure to be measured and mutually shot.Marking wave
In wave ship this moment position when PIV data.
The trigger signal that ship stern flow fields PIV is measured in wave is moved the measuring method from trigger device by ship, specifically
Including four-stage：
1. test the preparatory stage
(a) (21) spacing of silver wire on mark plate and pitch angular shaft encoder are determined according to the wave height of experiment wave operating mode
(16) characteristic angle；
(b) mark plate (4) is fixed on the correspondence position on heave bar (7), come really further according to the position in measured section
Surely the installation site of bar is heaved, pays attention to during installation heaving bar (7) and horizontal plane.
(c) laser sensor (3), PIV data acquisitions and signal are adjusted into computer (1), angle shaft encoder (16) and same
Device (2) connection is walked, regulating system is set, and silver wire is in crest, trough (during equilbrium position) and laser sensor and is formed loop
And signal is produced, in addition, pitch angular shaft encoder angle, which is at characteristic angle, also forms loop generation signal.
2. the test adjustment stage
(a) trailer rests in pond middle section position, and measuring system is debugged under the conditions of carrying out no speed of a ship or plane
(b) trailer, which blows a whistle to dispatch a car, makes ripple indication signal, makes the corresponding wave operating mode of ripple room laboratory technician progress and makes ripple.
(c) wave is transferred to ship model position and interacted with model, and heave, pitching occur for ship.Point
The debugging of pure heave movement (locking pitching) state measurement is not carried out, and pure pitching (locking heave movement) state measurement is adjusted
Examination and heave, pitching coupled motions debugging.
(d) whether inspection system loop is unimpeded, and whether markings spacing and pitch axis encoder feature angle are correct.
3. experimental stage
(a) tested under the conditions of pure heave：Wave maker manufacture wave (8), ship model (9) to be measured is by trailer to fix speed of a ship or plane traction
Navigation.Wave (8) produces pure heave movement (22) with ship model (9) interaction, heave movement makes markings (21) and laser
Sensor (3) forms loop excitation signal and is transmitted into synchronizer, and synchronizer carries out signal transacting, and transmission signal is synchronized to PIV measurements
The laser (10) of system (15) and camera (12) (13).Laser transmitting laser sheet optical (14) and simultaneously camera carry out area to be measured
Domain (19) figure is mutually shot.Record wave in ship this moment position when PIV data.
(b) tested under the conditions of pure pitching：Wave maker manufacture wave (8), ship model (9) to be measured is by trailer to fix speed of a ship or plane traction
Navigation.Wave (8) produces pure pitching (23) with ship model (9) interaction and moved, and pitching reaches characteristic angle and excites pitching
The automatic trigger circuit of motor message simultaneously transmits signals to synchronizer (2), and synchronizer carries out signal transacting, and transmission signal is synchronized to
The laser (10) of PIV measuring systems (15) and camera (12) (13).Laser launches laser sheet optical (14) and camera enters simultaneously
Row region (19) figure to be measured is mutually shot.Record wave in ship this moment position when PIV data.
(c) heave, the experiment of pitching coupling condition：Wave maker manufacture wave (8), ship model (9) to be measured are navigated by trailer with fixed
Fast towing voyage.Wave (8) produces pitching (23) and heave movement (22) with ship model (9) interaction, and pitching reaches special
Sign angle excites the automatic trigger circuit of pitching signal and transmits signals to synchronizer (2), and heave movement makes markings (21)
Loop excitation signal is formed with laser sensor (3) and is transmitted into synchronizer, and synchronizer carries out coupled signal processing, launches common full
Sufficient signal is synchronized to the laser (10) and camera (12) (13) of PIV measuring systems (15).Laser transmitting laser sheet optical (14)
And region (19) figure to be measured of camera progress simultaneously is mutually shot.Record wave in ship this moment position when PIV data.
If (d) carrying out the PIV measurements under other wave operating modes, the markings spacing that need to only carry out testing the preparatory stage is adjusted
Section is adjusted with pitch angular shaft encoder characteristic angle.
4. the experimental data processing stage
(a) carry out PIV flow fields data processing under pure heave, pure pitching and heave, pitching coupled motions respectively, and with phase
Answer under Test Cycle wave peak-to-valley value and wave phase etc. to carry out position correspondence, formed ship stern flow fields transient state under wave condition,
Average, time, the flow field such as averagely was for further ship and impeller design and optimization application.
The present invention principle be：
In wave ship stern flow fields PIV measure trigger signal by ship move from trigger device be by laser sensor,
Synchronizer, mark plate, heave bar and pitch angular shaft encoder are formed.Laser sensor is used for launching laser on heave bar
Mark plate simultaneously transmits signals to synchronizer after signal forms path, and heave bar is fixed on position section to be measured, synchronous with ship
Heave movement is carried out, wave makes ship that pitching occur, and mark plate is arranged on heave bar, for receiving laser sensor hair
The signal penetrated.Pitching is acted on ship, makes ship pitch angular shaft encoder that angle change occur.Mark plate is using black
Color background, three equidistant silver color mark lines are housed on plate.Installation site of the mark plate on heave bar meets, on mark plate
Middle silver wire position and laser in the same horizontal line.Wave makes ship that lifting campaign occur, and lifting campaign has acted on
Lie prostrate on bar, fook change in location makes the laser of silver wire and trigger device form path, while angular encoder record is different
Angle moment coding information, TTL signal is sent according to feature coding angle is initially set up, synchronizer receives heave and pitching
The signal instruction of triggering, PIV systems are transmitted a signal to, the pulse laser and camera for triggering PIV systems are started working, and record wave
Middle ship this moment position when PIV data.
To sum up, ship motion automatic signal trigger device includes laser sensor to the present invention in by wave, laser signal connects
Receive and signal trigger flag plate, movement of ship model heave bar and pitch angular shaft encoder.Laser sensor is used for launching laser light
Signal, movement of ship model heave bar, which is fixed in ship, to be located, and progress heave movement synchronous with ship, pitch angular shaft encoder are used for
Record ship pitch angular and by the automatic trigger signal of ship pitching to synchronizer.Laser signal receives to be marked with signal triggering
Will plate is arranged on heave bar, for receiving the signal of laser transmitter projects.Mark plate uses black background, and three are equipped with plate
The equidistant silver color mark line of bar.Silver color mark line is used for receiving the laser light signal of laser sensing transmission, works as laser light signal
By forming signal triggering passage during silver color mark line, trigger signal is sent to synchronizer, and synchronizer is received by pitching
The signal that is sent with heave movement simultaneously triggers PIV flow field survey systems.PIV systems excite two-chamber yttrium according to the signal received
Aluminium garnet PIV measures laser system and PIV camera systems start-up operation collection measured zone fine flow field picture.The present invention is suitable
For based on the underwater PIV measuring systems of towing basin with ship stern flow fields measurement experiment under wave state, can measure
Ship rises crest, half crest, equilbrium position, half trough and trough etc. under pitching effect in wave
Do more physical exercises moment transient state, the time is average and the tail flow field of phase average, the measurement for ship stern flow fields in wave have provided
The PIV measurement signals of effect trigger automatically and measuring method, avoid artifactual epochs and trigger interference and movement position and measurement position
Put asynchronous problem.
Claims (2)
1. the trigger signal that ship stern flow fields PIV is measured in wave is moved from trigger device by ship, it is characterised in that：Including
PIV data acquisitions receive and signal trigger flag with signal adjustment computer, laser sensor, PIV measuring systems, laser signal
Plate, signal synchronizer, movement of ship model heave bar and pitch angular shaft encoder, the pitch angular shaft encoder are arranged on ship model
On, the movement of ship model heave bar is arranged on above pitch angular shaft encoder, and the laser signal receives to be marked with signal triggering
Will plate is arranged on movement of ship model heave bar, and it is black background plate that laser signal, which is received with signal trigger flag plate, and black is carried on the back
The silver color mark line of at least three rows is provided with scape plate, the PIV measuring systems include PIV lasers and two cameras, when sharp
The laser light signal of optical sensor transmitting forms signal triggering passage when passing through silver color mark line, and trigger signal is sent to synchronization
Device, synchronizer receive by the signal that pitching and heave movement are sent and trigger PIV flow field survey systems, PIV measurements system
The PIV lasers of system and two cameras are started working and gather picture.
2. the trigger signal that ship stern flow fields PIV is measured in wave is moved the measuring method from trigger device, its feature by ship
It is：Device including claim 1, specifically includes four-stage：
One, tests the preparatory stage
(a) spacing of silver color mark line and pitch angular shaft encoder on mark plate are determined according to the wave height of experiment wave operating mode
Characteristic angle；
(b) installation site of movement of ship model heave bar is determined according to the position to be measured ship section, ensures ship during installation
Mould motion heave bar and horizontal plane；
(c) laser sensor, PIV data acquisitions are connected with synchronizer respectively with signal adjustment computer, angle shaft encoder, made
Silver color mark line is in crest, trough and laser sensor and forms loop and produce signal
Two, test adjustment stages
(a) trailer rests in pond middle section position, and measuring system is debugged under the conditions of carrying out no speed of a ship or plane；
(b) trailer, which blows a whistle to dispatch a car, makes ripple indication signal, makes the corresponding wave operating mode of ripple room laboratory technician progress and makes ripple；
(c) wave is transferred to ship model position and interacted with model, and heave, pitching occur for ship, and carry out respectively
Pure heave movement state measurement debugging, the debugging of pure pitching state measurement and heave, pitching coupled motions debugging.
(d) whether inspection system loop is unimpeded, and whether markings spacing and pitch axis encoder feature angle are correct；
Three, experimental stages
(a) tested under the conditions of pure heave：Wave maker manufactures wave, and ship model to be measured is by trailer to fix speed of a ship or plane towing voyage, ripple
Wave produces pure heave movement with ship model interaction, and heave movement makes silver color markings form loop with laser sensor and will swashed
Signalling is transmitted into synchronizer, synchronizer carries out signal transacting and transmission signal be synchronized to the PIV lasers of PIV measuring systems with
Two cameras, PIV lasers launch laser sheet optical and the figure in the region to be measured of ship model are mutually shot by two cameras simultaneously,
Record wave in ship model to be measured this moment position when PIV data；
(b) tested under the conditions of pure pitching：The wave of wave maker manufacture produces pure pitching, pitching with ship model to be measured interaction
Motion reaches characteristic angle and excites pitching signal to transmit signals to synchronizer through pitch angular shaft encoder, and synchronizer is carried out
Signal transacting and transmission signal are synchronized to the PIV lasers and two cameras of PIV measuring systems, PIV lasers transmitting laser piece
Light and the figure in the region to be measured of ship model is mutually shot by two cameras simultaneously, record in wave ship model to be measured this moment position when
PIV data；
(c) heave, the experiment of pitching coupling condition：The wave of wave maker manufacture produces pitching and heave with ship model to be measured interaction
Motion, pitching reach characteristic angle and excite pitching signal to transmit signals to synchronizer through pitch angular shaft encoder,
Heave movement makes silver color markings be transmitted into synchronizer with laser sensor composition loop excitation signal, and synchronizer carries out coupling letter
Number handle and launch the laser and two cameras for meeting that signal is synchronized to PIV measuring systems jointly, the transmitting of PIV lasers swashs
Mating plate light and the figure in the region to be measured of ship model is mutually shot by two cameras simultaneously, record in wave ship model to be measured position this moment
PIV data when putting；
Four, experimental data processing stages
(a) PIV flow fields data processing under pure heave, pure pitching and heave, pitching coupled motions is carried out respectively, and is surveyed with corresponding
Measure wave peak-to-valley value and wave phase etc. under operating mode and carry out position correspondence, form ship stern flow fields transient state, Xiang Ping under wave condition
, the time flow field such as averagely is applied with optimization for further ship and impeller design.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711078267.2A CN107891946B (en) | 2017-11-06 | 2017-11-06 | The trigger signal that ship stern flow fields PIV is measured in wave is moved by ship from trigger device and measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711078267.2A CN107891946B (en) | 2017-11-06 | 2017-11-06 | The trigger signal that ship stern flow fields PIV is measured in wave is moved by ship from trigger device and measurement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107891946A true CN107891946A (en) | 2018-04-10 |
| CN107891946B CN107891946B (en) | 2019-06-14 |
Family
ID=61804115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711078267.2A Active CN107891946B (en) | 2017-11-06 | 2017-11-06 | The trigger signal that ship stern flow fields PIV is measured in wave is moved by ship from trigger device and measurement method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107891946B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108860453A (en) * | 2018-06-22 | 2018-11-23 | 上海船舶运输科学研究所 | Shipping agency wave measuring system and method |
| CN109000882A (en) * | 2018-07-31 | 2018-12-14 | 哈尔滨工程大学 | A kind of reality waters flow field PIV measuring system and measurement method |
| CN111122115A (en) * | 2020-01-08 | 2020-05-08 | 哈尔滨工程大学 | Multi-plane SPIV experimental device |
| CN113984330A (en) * | 2021-10-09 | 2022-01-28 | 济南大学 | Push-rocker type wave making and wave characterization experiment table and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3685256B2 (en) * | 2001-09-14 | 2005-08-17 | 東京電力株式会社 | Fluid flow measurement system |
| CN101210935A (en) * | 2007-12-21 | 2008-07-02 | 西安交通大学 | Secondary flow field transient characteristic measurement method |
| CN103941038A (en) * | 2014-04-25 | 2014-07-23 | 西北核技术研究所 | Flow field flow velocity measuring device and method capable of eliminating vibration interference |
| CN105675918A (en) * | 2016-01-05 | 2016-06-15 | 清华大学 | Moving positioning device for particle image velocimetry |
-
2017
- 2017-11-06 CN CN201711078267.2A patent/CN107891946B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3685256B2 (en) * | 2001-09-14 | 2005-08-17 | 東京電力株式会社 | Fluid flow measurement system |
| CN101210935A (en) * | 2007-12-21 | 2008-07-02 | 西安交通大学 | Secondary flow field transient characteristic measurement method |
| CN103941038A (en) * | 2014-04-25 | 2014-07-23 | 西北核技术研究所 | Flow field flow velocity measuring device and method capable of eliminating vibration interference |
| CN105675918A (en) * | 2016-01-05 | 2016-06-15 | 清华大学 | Moving positioning device for particle image velocimetry |
Non-Patent Citations (4)
| Title |
|---|
| 吴铁成: "基于水下SPIV的船体与推进器流场测量应用与研究", 《第十四届全国水动力学学术会议暨第二十八届全国水动力学研讨会文集》 * |
| 吴铁成: "拖曳水池随车PIV在船舶绕流场测量中的应用与研究", 《船舶力学学术委员会测试技术学组2016年学术会议论文集》 * |
| 王晓强: "PIV技术在某驳船模型强迫横摇水动力测试中的应用", 《中国舰船研究》 * |
| 骆婉珍: "基于SPIV的船体附着冰对尾流场影响试验研究", 《中国科学》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108860453A (en) * | 2018-06-22 | 2018-11-23 | 上海船舶运输科学研究所 | Shipping agency wave measuring system and method |
| CN108860453B (en) * | 2018-06-22 | 2023-08-22 | 上海船舶运输科学研究所 | Ship traveling wave measurement system and method |
| CN109000882A (en) * | 2018-07-31 | 2018-12-14 | 哈尔滨工程大学 | A kind of reality waters flow field PIV measuring system and measurement method |
| CN111122115A (en) * | 2020-01-08 | 2020-05-08 | 哈尔滨工程大学 | Multi-plane SPIV experimental device |
| CN111122115B (en) * | 2020-01-08 | 2022-06-17 | 哈尔滨工程大学 | Multi-plane SPIV experimental device |
| CN113984330A (en) * | 2021-10-09 | 2022-01-28 | 济南大学 | Push-rocker type wave making and wave characterization experiment table and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107891946B (en) | 2019-06-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107891946B (en) | The trigger signal that ship stern flow fields PIV is measured in wave is moved by ship from trigger device and measurement method | |
| CN103837320B (en) | A kind of water surface flying device splash list hull model basin test method | |
| CN110146895A (en) | Sound speed profile inversion method based on inversion type multi-beam echometer | |
| CN108362473B (en) | A kind of single hull model basin test method of the anti-unrestrained ability of water surface flying device | |
| CN201397137Y (en) | Integrated GPS positioning dual-frequency ultrasonic underwater topography measuring instrument | |
| WO2018058736A1 (en) | Method and device for detecting marine magnetism | |
| CN104133217B (en) | Method and device for three-dimensional velocity joint determination of underwater moving target and water flow | |
| CN103018481B (en) | Measurement method for three-dimensional ultrasonic wind meter with temperature correction | |
| CN111854704A (en) | Marine geophysical comprehensive survey system | |
| CN105004413B (en) | Acoustic propagation path comprehensive speed assay method and device for submarine target positioning | |
| CN102826208B (en) | High precision marine magnetometry trailing device | |
| CN102923283A (en) | Underwater fixed-depth and fixed-height towing device | |
| CN110108469B (en) | Suspended tunnel pipe section attitude measurement device, test system and test method | |
| CN108931777A (en) | The measurement method of cold seepage output gas migration flux | |
| CN203349841U (en) | Ship wave movement detection device | |
| CN102107723A (en) | Method using side-scan sonar to measure tonnage of ship | |
| CN106405559A (en) | Ship draught detection method | |
| KR20200053045A (en) | Modular autonomous surface robot of catamaran type | |
| CN110491174A (en) | A kind of inland navigation craft bridge-collision-avoidance detection system and method | |
| CN205898118U (en) | River course section surveying instrument | |
| CN104260848A (en) | Detection method and device for draft of ship in inland waterway | |
| CN107554719B (en) | A kind of ship load measurement method based on Sonar system | |
| CN108873058A (en) | A kind of submarine seismograph model machine and measurement method | |
| CN108761470A (en) | A kind of object localization method based on the parsing of towing cable shape equation | |
| US7161871B2 (en) | Method for determining ocean current and associated device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |