CN205506347U - Sheet flow roll wave measuring device based on high definition is photographic - Google Patents
Sheet flow roll wave measuring device based on high definition is photographic Download PDFInfo
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- CN205506347U CN205506347U CN201521128156.4U CN201521128156U CN205506347U CN 205506347 U CN205506347 U CN 205506347U CN 201521128156 U CN201521128156 U CN 201521128156U CN 205506347 U CN205506347 U CN 205506347U
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Abstract
The utility model relates to a sheet flow roll wave measuring device based on high definition is photographic, include: rivers process domatic, set up the high definition numeral view -finder that has automatic recording time on domatic, be equipped with the witness marker on domatic in the shooting field range of high definition digit view -finder, high definition digit view -finder be connected with roll wave recognizer, image calibrator, roll wave parameter calculation controller in proper order, roll wave parameter calculation controller and high definition digit view -finder be connected. The utility model discloses a roll wave photo of high -speed motion is caught in succession to fine definition's digital view -finder, uses the roll wave of digital image analytic technique in to the photo and carries out assay, obtains each feature parameter of roll wave. Owing to acquire a series of activities such as maring calculation and accomplish by computer control, with the tradition the utility model discloses can experimental and observe simultaneously observing the region can set up the multiple spot, solution that the visual field broadly can be fine is observed than large area's thin layer velocity of water flow.
Description
Technical field
This utility model relates to a kind of sheet flow roll wave measurement apparatus based on high definition photography, is a kind of experimental provision, is a kind of device for hydraulic measurements, is a kind of water conservancy project experiments of measuring device of roll wave characteristic parameter during indoor and outdoor thin layer liquid stream.
Background technology
Slope flow, constant, uniform open-channel flow etc. under certain critical condition, its surface usually can unstability and grow a series of wave process.These fluctuations are probably periodically, and velocity of wave and waveform all keep constant, and velocity of wave is consistently greater than the movement velocity of current particle；On the other hand, fluctuation is also likely to be acyclic, and waveform and velocity of wave constantly develop during propagating, and final generation crushes.These phenomenons are referred to as roll wave.Roll wave is common in natural slope, urban pavement, the sluicing chute in power station and the spillway of dam, the flood passage road in river, flume etc..The appearance of roll wave can bring a series of disadvantageous consequence, and such as current become unsteady flow from steady flow；Strengthen current makes soil particle peeling-off and the ability of defeated shifting silt to the erosiveness of Soil Slope；The depth of water at crest exceedes the design head in river (canal) road, causes overflow；Strong current aeration effect, causes atomizating phenomenon；Simultaneously to hydraulic structure pressure or stress of causing over loading on river (canal) road etc..Therefore, the critical condition of research roll wave formation and Evolution thereof, configuring for soil erosion process and water-and-soil conservation measures, and how to eliminate the theoretical research of roll wave and related discipline in engineering practice, such as movable bed resistance and current sediment transport etc. suffer from significance.Particularly underlying surface is complex or roughness relatively big under conditions of, as natural erosion Loess Surface, be covered with the ground, forest land of litter, meadow etc., the generation of roll wave and development to erosion, the handling process of slope flow, and pollutant diffusion process there is material impact.The roll wave feature obtained under different condition is basis and the premise carrying out sheet flow hydrodynamics research.Existing observation is then to utilize hydrology chaining pin directly to observe, the method is mainly by the relative position manually determining chaining pin and roll wave, owing to being that artificial visual is measured, and the change of roll wave is exceedingly fast, and human eye range estimation tends not to reach due effect, measurement is difficult to ensure that precision, due to artificial measurement, its less stable, each measurement result all differs, pendulous frequency can only be increased, use the acquisition of the method approximation of statistics to measure.This mode makes roll wave measurement become a kind of needs multiple complicated physical work, and along with the physically-draining of people, its precision also becomes worse and worse.Accordingly, it would be desirable to a kind of accurate system replaces this heavy muscle power measurement.
Summary of the invention
In order to overcome problem of the prior art, the utility model proposes a kind of sheet flow roll wave measurement apparatus based on high definition photography, the photography based on fine definition of described device, realize roll wave characteristic parameter and the change procedure thereof of sheet flow under the conditions of Complex Underlying Surface, obtain various characteristic parameters necessary to research roll wave, in order to roll wave is carried out in-depth study.
The purpose of this utility model is achieved in that a kind of sheet flow roll wave measurement apparatus based on high definition photography, domatic including: current process, described domatic added setting tool has the high-definition digital view-finder automatically recording the time, the shooting of described high-definition digital view-finder is within the vision domatic is provided with witness marker, described high-definition digital view-finder is connected with roll wave evaluator, image aligner, roll wave parameter computing controller successively, and described roll wave parameter computing controller is connected with high-definition digital view-finder.
Further, described domatic it is arranged over secondary light source.
Further, described secondary light source includes multiple point source and diffuse-reflectance plate.
Further, described domatic be the bottom surface of experimental trough, described experimental trough is provided with slope flow water source；Described experimental trough includes: the both sides ledge of mounting and fixing support and the bottom land being connected with described ledge, described ledge and bottom land are arranged on steel frame, described steel frame one end arranges hinge, the other end arranges elevating mechanism, described experimental trough arranges outlet in hinge one end, and described outlet is connected with circulating water pool pipeline；Described high-definition digital view-finder, is arranged on one and can make high-definition digital view-finder along the movable guide rail of water (flow) direction.
Further, described bottom land is the one in glass, plastics, metallic plate or compacting the smooth earth face hardened.
Further, described roll wave generator includes: water jet array that be arranged on domatic top, that arrange in length and breadth, and described water jet array is connected with circulating water pool pipeline by flow control valve and water pump.
Further, described slope flow water source includes: be arranged at least one water inlet of the described tank other end relative with outlet, and described water inlet is connected with circulating water pool pipeline by flow control valve and water pump.
This utility model produces and provides the benefit that: this utility model uses the digital image acquisition device of fine definition, the roll wave photo of continuous capturing high-speed motion, and the roll wave in photo is analyzed by Applied Digital image analysis technology, obtains each characteristic parameter of roll wave.Having controlled by computer owing to obtaining a series of activities such as calibrated and calculated, can arrange multiple spot in observation area with traditional this utility model tests simultaneously and observes, the broad flow rate of thin water flow observation that can well solve large area in visual field.Because mainly Digital Image Processing, both adapted to office work and be also adapted to field work.Owing to work on the spot amount is less, work under particularly suitable harsh conditions in the wild.Only needing less record due to observation process, make observational record process more objective, man's activity and subjective error are less.It is capable of the process observation record of current spike section, it is achieved the directly observation of multiple eigenvalues such as roll wave velocity of wave, frequency and calculating, makes the observation of sheet flow process and calculate more science and accurately.Device described in the utility model makes full use of some hardware of ready-made technology maturation, software, is combined, and experimental cost is the lowest, good economy performance, and precision but can arrive at a relatively high degree.
Accompanying drawing explanation
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of device described in embodiment one, two of the present utility model；
Fig. 2 is the structural representation of device described in embodiment four, six of the present utility model；
Fig. 3 is the structural representation of device described in embodiment seven of the present utility model；
Fig. 4 is roll wave identification schematic diagram described in this utility model embodiment ten.
Detailed description of the invention
Embodiment one:
The present embodiment is a kind of sheet flow roll wave measurement apparatus based on high definition photography, as shown in Figure 1.The present embodiment includes: domatic the 1 of current process, described domatic added setting tool has the high-definition digital view-finder 2 automatically recording the time, the shooting of described high-definition digital view-finder is within the vision domatic is provided with witness marker 3, described high-definition digital view-finder is connected with roll wave evaluator 4, image aligner 5, roll wave parameter computing controller 6 successively, and described roll wave parameter computing controller is connected with high-definition digital view-finder.
The present embodiment absorbs the photo of water surface roll wave information by high-definition digital view-finder in the domatic surface being generated roll wave, utilize what data handling system carried out photo just to penetrate correction, utilize data handling system to align the photo after penetrating correction and carry out roll wave texture blending or direct labor's interpretation, obtaining the radian of roll wave, length, broken situation etc., the photo after utilizing multiple to process extracts the parameters such as the velocity of wave of roll wave, frequency.The present embodiment forms the roll wave water stream characteristics rapid measuring system of scientific and efficient by high-definition digital view-finder and data handling system, the impact that observation is caused by the merging phenomenon can being prevented effectively from roll wave motor process etc., sheet flow characteristic parameter is made to measure more accurately and efficient, more convenient to operate, the process of test more easily controls.
For making photography make the crest of roll wave become apparent from, secondary light source can be provided above at the domatic of roll wave generation.Secondary light source can be with shot-light or with the point source of diffuse-reflectance tabula rasa, point source can be electric filament lamp or LED.
The described domatic tank that can be to be specifically used to experiment, it is also possible to be the field natural slope meeting experiment condition.Its condition is to have the flat grade of certain slope, the earth that domatic underlying surface can be smooth finishes face, sheet flow can be produced in the case of raining or having water source, and in sheet flow, generate roll wave, be also satisfied simultaneously and be easy to set up high-definition digital view-finder (photographing unit).
The domatic ground that can be glass, plastics or sheet metal and be formed formed exclusively for the tank of experimental design, or bottom land soil compaction, form the earth underlying surface hardened.
The ability of the tank gradient to be changed.Tank is provided with slope flow water source, makes constantly to produce in tank the roll wave in current and current.The source of sheet flow has two kinds, a kind of current being artificial rain device simulated rainfall and being formed.A kind of is that current cause the top, slope that tank is domatic, makes current in the sink by the free overflow of top down, produces sheet flow and roll wave in the sink.
Witness marker can be to follow closely the short wooden stake on the most domatic, is coating brightly painted paint.The tank of laboratory can directly be used brightly painted painting sign.
Described high-definition digital view-finder can be the photographing unit of high-resolution, or the photographic head of high-resolution.The most so-called high-resolution refers to that the pixel request of the imageing sensor of silent frame (32 millimeters) should be in ten million rank.Photographing unit the most all has the function of record time, and photographic head then needs to connect to relevant computer, and has corresponding software to coordinate, and obtains digital picture and the acquisition time of image.
Roll wave evaluator described in the present embodiment, image aligner, roll wave parameter computing controller are provided in device in computer, can be controlled the shooting process of photo by these devices, and be analyzed photo, it is thus achieved that the characteristic parameter of roll wave.
The effect of roll wave evaluator is to be identified by the middle roll wave peak line of photo.Owing to roll wave is under the shining of bright light, present bright light belt, photo can be obtained by the brightness of compared pixels the lines of roll wave crest.
The effect of image aligner is to be calibrated by the pattern error that caused of photography, make roll wave distorted position in photo return to accurately should position on.
The effect of roll wave parameter computing controller is the shooting controlling photo, according to certain time interval, the interval of several seconds, shoots, and the time of records photographing, if high-definition digital view-finder is photographing unit, then by camera record shooting time.
The photo of shooting to be also analyzed by roll wave parameter computing controller, calculates each characteristic parameter of roll wave, such as parameters such as the velocity of wave of roll wave, the distance between each roll wave, the frequencies of roll wave.
Embodiment two:
The present embodiment is the improvement of embodiment one, is that embodiment one is about domatic refinement.Domatic described in the present embodiment is arranged over secondary light source 7, sees Fig. 1.
Secondary light source can be shot-light, or the diffuse-reflectance reflector that point source coordinates, and makes uniform illumination be suitable for extracting roll wave image.
Embodiment three:
The present embodiment is the improvement of embodiment two, is the embodiment two refinement about secondary light source.Secondary light source described in the present embodiment includes multiple point source and diffuse-reflectance plate.
Point source constant volume really easily forms uneven bright spot in roll wave, then can overcome this shortcoming when using diffuse-reflectance reflector.
Embodiment four:
The present embodiment is the improvement of above-described embodiment, is that above-described embodiment is about domatic refinement.Domatic described in the present embodiment is the bottom surface of experimental trough, and described experimental trough is provided with slope flow water source；Described experimental tank includes: the both sides ledge installing described fixed mount and the bottom land 101 being connected with described ledge, described ledge and bottom land are arranged on steel frame 102, described steel frame one end arranges hinge 103, the other end arranges elevating mechanism 104, described experimental trough arranges outlet 105 in hinge one end, and described outlet is connected with circulating water pool 106 pipeline；Described high-definition digital view-finder, be arranged on one can make high-definition digital view-finder along the movable guide rail of water (flow) direction 108, as shown in Figure 2.
The present embodiment is the assay device carrying out roll wave test in the lab, uses steel frame as skeleton, uses the sheet material such as glass, plastics to build tank on skeleton.One end of steel frame arranges hinge, makes tank can rotate around hinge, and the other end at tank arranges hoisting mechanism, utilizes the cooperation of hoisting mechanism and hinge, changes the angle of bottom of gullet and horizontal plane, forms the domatic of different gradient.One end relatively low at tank arranges outlet, is that in tank, the current of flowing get rid of tank in time.
Described slope flow water source is really a set of free overflow water blood circulation forming stable and uniform in the sink.Slope flow water source forms current in the sink two ways, a kind of artificial rain device being accurately to control rainfall and rainfall intensity, including: water jet array that be arranged on the domatic top of current, that arrange in length and breadth, water jet array, orifice array is supplied water by feed pump and cistern.Another kind is that stream is guided the higher one end of tank, make current crossheading and under, generate sheet flow and roll wave in groove bottom.
High-definition digital view-finder is arranged on The Cloud Terrace, this The Cloud Terrace can rotate around the trunnion axis that water (flow) direction is vertical, The Cloud Terrace can be moved by the downward horizontal guide rail of the driving of motor along a horizontal guide rail consistent with water (flow) direction, and movement position and the angular transformation of The Cloud Terrace are all connected on controller by cable.So high-definition digital view-finder can be made to be in the surface in region being shot all the time by control The Cloud Terrace, high-definition digital view-finder can be made the most just to shooting area by adjustment angle simultaneously.
Embodiment five:
The present embodiment is that above-described embodiment improves, and is the above-described embodiment refinement about tank.Bottom land described in the present embodiment is the one in glass, plastics, metallic plate or compacting the smooth earth face hardened.
Tank can use glass plate, metallic plate or plastics to build, and its bottom surface can be exposed glass, plastics and metallic plate, it is possible to use it is domatic, with the underlying surface in simulating natural environment that soil compaction forms the natural knotts clay of simulation.
Embodiment six:
The present embodiment is the improvement of above-described embodiment, is the above-described embodiment refinement about slope flow water source.Slope flow water source described in the present embodiment includes: water jet array 109 that be arranged on domatic top, that arrange in length and breadth, and described water jet array is connected with circulating water pool pipeline by flow control valve and water pump 110, sees Fig. 2.
Slope flow water source described in the present embodiment is the artificial rain device of rainfall in simulating natural environment, simulation is the situation that roll wave occurs in rainfall, current are constantly supplemented in flowing in this case, closer in the situation producing roll wave in the rain.
Embodiment seven:
The improvement of the present embodiment above-described embodiment, is the above-described embodiment refinement about slope flow water source.Slope flow water source described in the present embodiment includes: be arranged at least one water inlet 111 of the described tank other end relative with outlet, and described water inlet is connected with circulating water pool pipeline, as shown in Figure 3 by flow control valve and water pump.
For being accurately controlled flow, electromagnetic flowmeter can be set between flow control valve and tank.Accurate sheet flow is produced by flow control valve and electromagnetic flowmeter.
For guaranteeing stablizing of current in tank, reduce the interference that roll wave is produced, can multiple water inlet be set, arranging (yi word pattern is vertical with water (flow) direction) at sink top yi word pattern, make the current can formation sheet flow in tank uniformly.
As a rule, the current of water pump output are with certain pulsation, if exit of pump (water inlet of tank) is set directly at sink top, the current formed can be disturbed by pulsation, making water flow process uneven, in interference sheet flow, the formation of roll wave, does not reaches the effect of experiment.Therefore current fairing, stationary flow can be set in the tank water inlet, top of tank.
Current fairing is really the system of a set of elimination water supply flow instability, it is ensured that the stability of water outlet water flow process and uniformity, thus eliminates water supply and produce roll wave and the impact of evolution.
Current fairing can be water tank, i.e. arranging a water tank at the top that tank is domatic, store certain water yield, the outlet (flowing to the water out of tank) of water tank is downflow weir, the impact utilizing the volume-absorption water pump water supply of Water in Water Tanks amount to produce, utilizes overflow to produce stable sheet flow.
Water tank overflow supplies water and there is also the problem such as instability, water tank vibrations, the unstability of the water tank overflow process caused.And hence it is also possible to further downflow weir to be changed into multilamellar rectification orifice plate or rectification tube sheet, utilize the current of the further stable output of orifice plate or tube sheet.Rectification orifice plate is exactly the water hole having stamped diameter about 1mm fine and closely woven on the corrosion resistant plate of thickness about 2mm, by multiple-layer stacked, places between water inlet and the overflow limit of tank, eliminates, with this, the water flow fluctuation that cistern water supply pipe out of flow procedure causes.Rectification hole pipe is to eliminate the uneven eddy current that water tank overflow process is formed, and after being placed on overflow, the top rectification tube sheet of tank is formed by diameter 1cm, the pvc pipe close-packed arrays of long 2 ~ 3cm.
Embodiment eight:
The present embodiment is a kind of sheet flow roll wave measuring method based on high definition photography using device described in above-described embodiment.The ultimate principle of the present embodiment is:
Find relatively flat to have the most in the wild and can produce the domatic of roll wave, or use tank in the lab, the angle of furnishing tank erection and adjustment high-definition digital view-finder (can be photographing unit or high-definition camera).Index point is set by roll wave current, just penetrates correction for later stage photo, and give the texture full-size(d) on photo.Secondary light source is set in current oblique upper, irradiates the water surface, for strengthening the texture features of roll wave, facilitate later stage Computer Automatic Extraction roll wave feature contour.High-definition digital view-finder is utilized to shoot water flow process photo directly over current.Utilize collinearity equation, photo is just being penetrated correction-Computer Automatic Recognition roll wave contour line.
Chronophotograph is compared, extraction roll wave evolution Feature: roll wave move distance/photo time difference=roll wave velocity of wave；The quantity (roll wave frequency) by roll wave of the specific section unit interval；
Ground high-precision three-dimensional scanning terrain data-coupling roll wave feature-matching thin-layer current water level；Resolve sheet flow Hydrodynamic Process under the conditions of Complex Underlying Surface.
Specifically comprising the following steps that of method described in the present embodiment
The step arranged: for recording or set the gradient that current are domatic, set high-definition digital view-finder, make that roll wave is just being likely to occur by high-definition digital view-finder camera lens is domatic, and ensure that tested region and witness marker are all in view-finder, and the area that tested region is in view-finder as far as possible greatly, record the distance between each witness marker and position coordinates, set secondary light source.The enforcement of the present embodiment mainly has two kinds of situations, and one is to be observed in the wild, and another kind is to be observed in the lab.The angle of inclination of tank to be adjusted when Laboratory Observation, the shooting angle of high-definition digital view-finder to be adjusted, be the camera lens of high-definition digital view-finder just to tank, even if the shooting ray of the camera lens of high-definition digital view-finder and tank plane perpendicular, as shown in Figure 1.Secondary light source can be set if desired, make roll wave characteristic curve become apparent from.
Form the step of sheet flow: be used for waiting domatic formation sheet flow, or set flow and open slope flow water source, on current are domatic, form roll wave current.If observed in the wild, then current formation need carrying out in the rain, or natural flows is caused be observed domatic on.If in the tank of laboratory, i.e. can open the switch of water pump, set working flow by electromagnetic flowmeter, make current be gradually filled with upstream water tank, water in water tank eliminates the fluctuation of overflow out of flow procedure through current fairing, forms stable water outlet current.
The step of shooting: the roll wave current of test zone are shot for opening high-definition digital view-finder, with the photo of the interval shooting more than two of several seconds, time of records photographing and the picture pixel quality of shooting while shooting.The process of shooting is repeated multiple times, generally to shoot thousands of photos and compare, if with manually processing, will be the hugest a task.
Extract the step of roll wave characteristic curve: for the brightness of the photo of shooting is analyzed, obtain roll wave characteristic curve.The characteristic curve of roll wave being identified there are two kinds of methods automatically: (1) line detection method: select at the center line and 1/3 width of water (flow) direction, carry out pixel brightness value contrast, continuous 3 pixel brightness values i.e. represent roll wave position more than meansigma methods position；(2) face detection method: utilize high pass filtering algorithm to detect photo, then the crest that brightness is higher will be detected；Then position and form according to crest calculate the eigenvalues such as the spacing of roll wave, radian.
The step of image procossing: for each test image of shooting is carried out ortho-rectification, the coordinate of picture pixel quality, the coordinate of witness marker and shooting point position according to captured photo is set up and is measured coordinate system, finds out the accurate coordinate of roll wave characteristic curve accurately.Due to the restriction of photograph taking, the difference that photo is the most certain with practical situation, the particularly distance between twice roll wave characteristic curve, shooting obtains distance has a little difference with actual, needs to carry out correcting to eliminate difference, obtains the distance of precision.
Calculate the step of roll wave velocity of wave: be used for extracting photo and generate the time, utilize different time interval information captured by photo and the co-ordinate position information with roll wave characteristic curve to calculate the velocity of displacement of roll wave characteristic curve.The time utilizing shooting photo and the effect of the roll wave characteristic curve determined, several photos shot sequentially in time of comparison can be obtained by the characteristic parameters such as the speed of roll wave.The pixel of roll wave characteristic curve is added up, extracts statistical information, including the position of characteristic point on roll wave characteristic curve and coordinate.Same place on roll wave characteristic curve on two chronophotographs of front and back is calculated its relative distance, utilizes distance/Time Calculation roll wave velocity of wave.
Calculate the step of roll wave frequency: utilize multiple chronophotographs, detect the roll wave number by specifying section, utilize number and Time Calculation to specify the roll wave of section to pass through frequency.
Embodiment nine:
The present embodiment is the improvement of embodiment eight, is the embodiment eight refinement about the step extracting roll wave characteristic curve.In the step extracting roll wave characteristic curve described in the present embodiment, the identification to roll wave characteristic curve utilizes high pass filtering algorithm to detect whole photo, is detected by brightness height roll wave characteristic curve.
This is a kind of mode being identified whole photo.The reliability of this mode identification is high, but needs more hardware resource and operation time.Its process identified can use pattern edge enhancement techniques and figure partitioning boundary technology.
Embodiment ten:
The present embodiment is the improvement of embodiment eight, is the embodiment eight refinement about the step extracting roll wave characteristic curve.The step extracting roll wave characteristic curve described in the present embodiment includes following sub-step:
Along the middle live width of water (flow) direction in photo, carrying out pixel brightness value contrast, continuous 3 pixel brightness values are the centre position of roll wave characteristic curve more than the position of meansigma methods；
Roll wave characteristic curve other positions photo are found from the centre position of roll wave characteristic curve to search around.
Mode described in the present embodiment is a kind of fast and convenient recognition method, make use of roll wave characteristic curve is the feature of threadlike graph, and assume that roll wave characteristic curve 8 is that the most symmetrical (photo is water (flow) direction up and down in photo, as shown in Figure 4), centre position (chain-dotted line in Fig. 4) at photo, scanning along water (flow) direction (direction of arrow in Fig. 4), pixel brightness value contrast necessarily can find a point on the characteristic curve of roll wave.Then by this point, the round-looking scan put to this, compared by pixel intensity, whole piece roll wave characteristic curve can be found.
Finally it should be noted that, below only in order to the technical solution of the utility model to be described and unrestricted, although this utility model being described in detail with reference to preferred arrangement scheme, it will be understood by those within the art that, the technical solution of the utility model (such as high-definition digital view-finder and domatic set-up mode, the sequencing etc. of step) can be modified or equivalent, without deviating from the spirit and scope of technical solutions of the utility model.
Claims (7)
1. a sheet flow roll wave measurement apparatus based on high definition photography, domatic including: current process, described domatic added setting tool has the high-definition digital view-finder automatically recording the time, the shooting of described high-definition digital view-finder is within the vision domatic is provided with witness marker, it is characterized in that, described high-definition digital view-finder is connected with roll wave evaluator, image aligner, roll wave parameter computing controller successively, and described roll wave parameter computing controller is connected with high-definition digital view-finder.
Measurement apparatus the most according to claim 1, it is characterised in that described domatic be arranged over secondary light source.
Measurement apparatus the most according to claim 2, it is characterised in that described secondary light source includes multiple point source and diffuse-reflectance plate.
4. according to the measurement apparatus one of claim 1-3 Suo Shu, it is characterised in that described domatic be the bottom surface of experimental trough, described experimental trough is provided with slope flow water source；Described experimental trough includes: the both sides ledge of mounting and fixing support and the bottom land being connected with described ledge, described ledge and bottom land are arranged on steel frame, described steel frame one end arranges hinge, the other end arranges elevating mechanism, described experimental trough arranges outlet in hinge one end, and described outlet is connected with circulating water pool pipeline；Described high-definition digital view-finder, is arranged on one and can make high-definition digital view-finder along the movable guide rail of water (flow) direction.
Measurement apparatus the most according to claim 4, it is characterised in that described bottom land is the one in glass, plastics, metallic plate or compacting the smooth earth face hardened.
Measurement apparatus the most according to claim 4, it is characterised in that described slope flow water source includes: water jet array that be arranged on domatic top, that arrange in length and breadth, described water jet array is connected with circulating water pool pipeline by flow control valve and water pump.
Measurement apparatus the most according to claim 4, it is characterized in that, described slope flow water source includes: be arranged at least one water inlet of the described tank other end relative with outlet, and described water inlet is connected with circulating water pool pipeline by flow control valve and water pump.
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| CN201521128156.4U CN205506347U (en) | 2015-12-30 | 2015-12-30 | Sheet flow roll wave measuring device based on high definition is photographic |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105444987A (en) * | 2015-12-30 | 2016-03-30 | 中国水利水电科学研究院 | Thin current rolling wave measurement system and method based on high-definition photographing |
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| CN105444987A (en) * | 2015-12-30 | 2016-03-30 | 中国水利水电科学研究院 | Thin current rolling wave measurement system and method based on high-definition photographing |
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