CN105588546A - Method and system for measuring slurry shape parameters and changes of slurry shape parameters over time - Google Patents
Method and system for measuring slurry shape parameters and changes of slurry shape parameters over time Download PDFInfo
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- CN105588546A CN105588546A CN201610147298.8A CN201610147298A CN105588546A CN 105588546 A CN105588546 A CN 105588546A CN 201610147298 A CN201610147298 A CN 201610147298A CN 105588546 A CN105588546 A CN 105588546A
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- video
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C11/00—Photogrammetry or videogrammetry, e.g. stereogrammetry; Photographic surveying
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C11/00—Photogrammetry or videogrammetry, e.g. stereogrammetry; Photographic surveying
- G01C11/36—Videogrammetry, i.e. electronic processing of video signals from a single source or from different sources to give parallax or range information
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; ceramics; glass; bricks
- G01N33/383—Concrete, cement
Abstract
The invention discloses a method and system for measuring slurry shape parameters and changes of the slurry shape parameters over time. The method includes the steps that a reference object marker is arranged on an experiment base plate or the relative position relationship between the experiment base plate and a video capturing device is fixed; the video capturing device captures a video of slurry flowing conduced on the experiment base plate and sends the video to a video reading device; the video reading device reads the video of slurry flowing, calculates to obtain the space matrix conversion information of the video according to the reference object marker or the fixed relative position relationship between the experiment base plate and the video capturing device, frames of images in the video are subjected to space matrix changes, then the slurry shape parameters and current time data of the frames of the video are read, and the change relationship between the slurry shape parameters and time is obtained. According to the method, as when the video of slurry flowing is captured, the capturing device does not need to be aligned with the to-be-measured slurry, and no accurate scale information needs to be arranged on the experiment base plate, the change relationship between the slurry shape parameters and the time is simply and accurately obtained.
Description
Technical field
The present invention relates to slurry measuring technique, particularly a kind of slurry form parameter and in time measuredThe method and system that change.
Background technology
Slurry comprises clean slurry, mortar or/and a series of Bingham fluid materials such as concrete, for example, and slurry onlyThe important component of composition self-compacting concrete, when aggregate volume and feature in self-compacting concrete are determinedTime, its service behaviour is determined by the rheological parameter of only starching. The rheological parameter of clean slurry, comprise yield strength andViscosity characteristics, described rheological parameter is mainly calculated and is obtained by the result of clean slurry slump divergence experiment. ExaminationTest result and mainly comprise that mini-slump extension and clean slurry flow to the required time of certain distance, according to twoResult of the test can calculate respectively yield strength and the viscosity characteristics of clean slurry, therefore, needs Measurement accuracyThe experimental result of clean slurry slump divergence, divergence (also claiming fluidity) and with the relation of time,And then calculate yield strength and the viscosity characteristics of clean slurry, for the mix-design of self-compacting concrete providesData support effectively, accurately.
At present, the method for measurement slurry form parameter and the relation of time is:
Step 1 is drawn graduation mark information in advance on test base plate;
Step 2, utilizes video capture device, and such as digital camera etc. taken whole slurry stream dynamic testProcess;
Step 3 after waiting until whole slurry stream dynamic test process, derives and looks from video capture deviceFrequently result, to the video fetch equipment of such as computer etc., is processed, and obtains slurry fluidity and timeRelation, further calculate flowing time corresponding to certain form parameter of slurry;
In this step, the process that video fetch equipment is processed results for video is for utilizing artificial treatmentOr adopt the methods such as computer coding.
Particularly, in a kind of implementation method, on test base plate, draw graduation mark in advance, by numberThe video of collected by camera slurry stream dynamic test process, waits for after off-test, derives video to computer,After computer load application Video processing software, operation test result, manually reads the every frame figure in videoThe slurry form parameter that picture is corresponding and current time data, manual record successively, until in result of the testVideo finish, and then obtain the time dependent form parameter set of slurry.
In another kind of implementation method, software program is set, such as adopting MATLAB software programmingSoftware program, this software program has the function that reads the slurry form parameter that every frame video image is corresponding,And reading reference coordinate is to test the coordinate of base plate and draw graduation mark information at test base plate; In testTime, by the coordinate of the camera lens reference test base plate of video capture device, just the mobile plane of slurry is carried outThe shooting of slurry stream dynamic test process, obtains testing after video, derives video to computer, moves setThe software program of putting, reads slurry form parameter that every two field picture in video is corresponding and right by software programThe time data of answering.
Although can adopt above-mentioned method to realize slurry form parameter and temporal evolution relation thereofMeasure, still, adopting said method to realize the survey to slurry form parameter and temporal evolution relation thereofWhen amount, there are following three class problems:
First kind problem, need to be used respectively video capture device and video fetch equipment, and by video figurePicture transmits between video capture device and video fetch equipment, and what cause result of the test obtains efficiency notHeight cannot be tested continuous high-efficient;
Equations of The Second Kind problem, in the time adopting another kind of implementation method, although do not need artificial treatment, byIn read reference coordinate be test base plate coordinate, so with regard to need the camera lens of video capture device fix andMeet imaging surface and test plane parallel, completely just to the slurry flow plane of taking, complicated operation,Installation accuracy requirement to video capture device is high, otherwise will produce the survey bringing due to imaging surface angleThe deviation of amount result; Further, because needs are completely just to the slurry flow plane of taking, can produce nothingBlocking when manual operation slurry stream dynamic test process that method is avoided, such as, in process of the test, due toManual operation fluidity cylinder, causes testing in first 1～2 second producing and blocking, and flow process obtains imperfect;
The 3rd class problem, above-mentioned two methods all need test base plate to carry out pretreatment, draw scaleLine information, in the time processing, the accuracy of the graduation mark to test base plate is had relatively high expectations, and exists inevitableMismachining tolerance.
To sum up, how simply and accurately to realize the measurement of slurry form parameter and temporal evolution relation thereofMethod.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of slurry form parameter and temporal evolution pass thereof measuredThe method of system, the method can simply and accurately realize slurry form parameter and temporal evolution relation thereofMeasurement.
The embodiment of the present invention also provide a kind of measure slurry form parameter and temporal evolution relation thereof beSystem, this system can simply and accurately realize the survey of slurry form parameter and temporal evolution relation thereofAmount.
According to above-mentioned purpose, the present invention is achieved in that
A method of measuring slurry form parameter and temporal evolution relation thereof, comprising:
The phase of object of reference mark or fixation test base plate and video capture device is set on base plate in testTo position relationship;
Video capture device is captured in the slurry carrying out on test base plate and flows after video, sends to video to readTaking equipment;
Video fetch equipment reads the mobile video of slurry, according to the object of reference mark arranging on test base plateKnow, or described relative position relation calculates after the space transformation matrix information of described video, to lookingFrequently each two field picture in carries out after space matrix variation, reads the slurry form parameter in each frame videoAnd current time data, obtain the form parameter of slurry and the variation relation of time.
A device of measuring slurry form parameter and temporal evolution relation thereof, comprising: test base plate,Video acquisition device and video reading device, wherein,
Test base plate, for arranging object of reference mark;
Video acquisition device, flows after video for being captured in the slurry carrying out on test base plate, sends toVideo fetch equipment;
Video fetch equipment, for reading the mobile video of slurry, according to the reference arranging on test base plateDescribed in calculating, looks the relative position relation of thing mark or fixation test base plate and video capture deviceAfter space transformation matrix information frequently, each two field picture in video is carried out, after space matrix variation, readingGet slurry form parameter in each frame video and current time data, the form parameter that obtains slurry withThe variation relation of time.
As can be seen from the above scheme, the embodiment of the present invention test arrange on base plate object of reference mark orThe relative position relation of fixation test base plate and video capture device, video capture device is captured in the test endThe slurry carrying out on plate flows after video, sends to video fetch equipment; Video fetch equipment reads slurryMobile video, according to the relative position of described object of reference mark or fixation test base plate and video capture deviceRelation calculates after the space transformation matrix information of described video, and each two field picture in video is carried outAfter space matrix changes, read slurry form parameter in each frame video and current time data,To the form parameter of slurry and the variation relation of time. Because not needing to gather, method provided by the invention establishesStandby in the time gathering slurry and flow video, just carry out to and need on test base plate, accurate scale be setInformation, so simply and accurately realize the measurement of slurry form parameter and temporal evolution relation thereof.
Brief description of the drawings
The one measurement slurry form parameter and time dependent that Fig. 1 provides for the embodiment of the present inventionMethod flow diagram;
Measurement slurry form parameter and time dependent method thereof that Fig. 2 provides for the embodiment of the present inventionProcess schematic diagram;
The schematic diagram that the object of reference that Fig. 3 provides for the embodiment of the present invention identifies;
Fig. 4 is the schematic diagram that the embodiment of the present invention is utilized smart mobile phone camera identification object of reference mark;
Fig. 5 is that the embodiment of the present invention identifies the example schematic diagram that video is converted according to object of reference;
Fig. 6 be the embodiment of the present invention utilize image processing software test starting point quantification of targets andThe example schematic diagram of three groups of test judged results;
Fig. 7 is that the embodiment of the present invention utilizes image processing software to carry out showing of border judgement and judged resultIllustrate intention.
Fluidity and the time relationship results of three groups of tests of the output that Fig. 8 provides for the embodiment of the present inventionExample schematic diagram.
Reference numeral
1001 test base plates
1002 object of reference marks
1003 divergence cylinders
1004 paste materials
1005 smart mobile phones
Detailed description of the invention
For making object of the present invention, technical scheme and advantage clearer, develop simultaneously referring to accompanying drawingEmbodiment, is described in further detail the present invention.
The embodiment of the present invention is in order simply and accurately to realize slurry form parameter and time dependentMeasure, as shown in Figure 1, the one that Fig. 1 provides for the embodiment of the present invention measure slurry form parameter andTime dependent method flow diagram, its concrete steps are:
Step 101, in test, object of reference mark or fixation test base plate and video acquisition are set on base plateThe relative position relation of equipment;
In this step, the relative position relation of described fixation test base plate and video capture device can beIn video fetch equipment, fix, also can in other readable device, fix, do not limit here;
Step 102, video capture device are captured in the slurry carrying out on test base plate and flow after video, send outGive video fetch equipment;
Step 103, video fetch equipment read the mobile video of slurry, according to what arrange on test base plateObject of reference mark, or the relative position relation of fixation test base plate and video capture device calculates instituteState after the space transformation matrix information of video, each two field picture in video is carried out to space matrix variationAfter, read slurry form parameter in each frame video and current time data, obtain the shape of slurryThe variation relation of parameter and time.
In this embodiment, described slurry form parameter includes but not limited to divergence and the slurry of slurryThe result of the test such as expanding area.
In this embodiment, test base plate includes but not limited to the flat of the conventional material such as glass, stainless steelPlatform, and backplate surface is without drawing the information such as graduation mark.
In this embodiment, described slurry comprises: the multiple powder such as cement, stone flour, flyash and slagThe clean pulp material of body and water and additive composition, also comprises the mixed of other kind powder solids and liquid compositionCompound is starched only, and above-mentioned clean slurry adds sand or/and the mortar forming after the solid materials such as stoneAnd concrete material etc.
In this embodiment, described object of reference is designated default image and maybe can measures the object of form parameter;
The process of the described space transformation matrix information that calculates described video is:
Maybe can measure the form parameter of the object of form parameter according to default image, and default image or canPosition and the shape information of the object of measurement form parameter in video image, calculates described videoSpace transformation matrix information.
In this embodiment, the relative position relation of described fixation test base plate and video capture device is:
The camera lens of fixed video collecting device and relative position and the angle of test between base plate, described in measurementRelative position and angle between the camera lens of video capture device and test base plate obtain.
The process of the described space transformation matrix information that calculates described video is:
According to described relative position relation information, determine relative between test base plate and video capture devicePosition and angle, calculate the space transformation matrix information of described video.
Certainly, also can adopt other modes to calculate the space transformation matrix information of described video.
In this embodiment, video capture device and video fetch equipment can be integrated in an equipment,Also can connect by wired or wireless mode. Being integrated in an equipment, it can be intelligent handMachine or panel computer.
In this embodiment, according to the space transformation matrix information of described video to each the frame figure in videoPicture carries out space matrix variation, exactly described video is changed to the rectangular coordinate system of objective plane definitionIn, thereby can read slurry form parameter in each frame video and current time data, starchedThe form parameter of body and the variation relation of time.
In this embodiment, image processing software can carry out color or brightness to the image in described videoChange and analyze.
In the present invention, utilize the known object of reference of shape arranging on test base plate, use existingOr the image processing software of self-programming, obtains and in video, tests corresponding pass between base plate and object of reference markSystem, and then calculate spatial alternation matrix information. The present invention according to the actual size of object of reference to describedVideo carries out coordinate transform, video to be measured is changed in the space matrix of object of reference definition, justIn follow-up slurry form parameter in each frame video and the current time data of reading. Like this, just eliminateThe impact of shooting angle on experimental measurement result.
In the present invention, according to spatial alternation matrix information, for the flow test test of slurry, quantizeAnd calculate test starting point characteristic of correspondence index, and then determine the starting point of test. In conjunction with process of the testIn video, utilize image processing techniques calculate slurry with test base plate border, further determine currentThe form parameter of slurry, in conjunction with test origin information, determines form parameter in complete slurry flow liquid processRelation over time.
The one that the embodiment of the present invention also provides is measured slurry form parameter and time varying system thereof,Its system comprises: test base plate, video acquisition device and video reading device, wherein,
Test base plate, for arranging object of reference mark;
Video acquisition device, flows after video for being captured in the slurry carrying out on test base plate, sends toVideo fetch equipment;
Video fetch equipment, for reading the mobile video of slurry, according to the reference arranging on test base plateDescribed in calculating, looks the relative position relation of thing mark or fixation test base plate and video capture deviceAfter space transformation matrix information frequently, each two field picture in video is carried out, after space matrix variation, readingGet slurry form parameter in each frame video and current time data, the form parameter that obtains slurry withThe variation relation of time.
Measurement slurry form parameter and time dependent method thereof that Fig. 2 provides for the embodiment of the present inventionProcess schematic diagram, as shown in the figure:
On test base plate 1001 surfaces, place the object of reference mark 1002 for identifying. By smart mobile phone1005, smart mobile phone includes but not limited to the Intelligent mobile equipment with camera such as panel computer, passes throughThe equipment such as tripod or the mode of operation such as hand-held are placed at test base plate 1001 oblique uppers, without certain bitsPut and angle, only need make the camera of smart mobile phone 1005 can capture test base plate 1001 regions andObject of reference mark 1002. According to Chinese Industrial Standards (CIS) GB/T8077-2000 " concrete admixture homogeneity testMethod " method in specification, mention clean slurry slump divergence cylinder 1003, utilize smart mobile phone 1005Camera catches and records the image on 1001 surfaces in clean slurry flow process, comprises the paste materials of test1004. Utilize the computing ability of smart mobile phone 1005 own, for example processing of smart mobile phone 1005Device, the color to the clean slurry flow process image capturing or brightness change to be analyzed, combining image placeReason technology, calculates the form parameter of clean slurry and the variation relation of time.
The schematic diagram that the object of reference that Fig. 3 provides for the embodiment of the present invention identifies, as shown in the figure, object of reference markKnowing 1002 is images of some stones.
Fig. 4 is the schematic diagram that the embodiment of the present invention is utilized smart mobile phone camera identification object of reference mark, asShown in figure, the object of reference in smart mobile phone screen identifies identified and occurs above mark video imageSpecific 3-D view,
Fig. 5 is that the embodiment of the present invention identifies the example schematic diagram that video is converted according to object of reference, asShown in figure, the left side be the image before video changes, the right is the image after video changes.
Fig. 6 be the embodiment of the present invention utilize image processing software test starting point quantification of targets andThe example schematic diagram of three groups of test judged results, as shown in the figure, the computer judgement knot of quantizating index DReally, consistent with artificial judged result.
Fig. 7 is that the embodiment of the present invention utilizes image processing software to carry out showing of border judgement and judged resultIllustrate intention, adopt in this way and calculate, until off-test.
Fluidity and the time relationship results of three groups of tests of the output that Fig. 8 provides for the embodiment of the present inventionExample schematic diagram.
The embodiment of the present invention has been utilized the camera of smart mobile phone and the fluidity of computing capability measurement slurryOver time. Utilize the advantage of smart mobile phone to be: meter that can be very fast after slump test finishesCalculate the fluidity temporal evolution relation of slurry, and do not need the follow-up data processing of carrying out. That is to say,The use of smart mobile phone is integrated the data acquisition and processing (DAP) of the slump test of slurry, test knotAfter bundle, can obtain result of the test, without additionally carrying out post processing.
The embodiment of the present invention has added the utilization of object of reference mark and image processing techniques, video capture deviceThe position of camera without being fixed, and can accurately calculate the every two field picture in described videoCorresponding fluidity, and need on test base plate, not mark graduation mark, reduce the processing of test base plateError with artificial reading. Meanwhile, due to the existence of object of reference mark, can allow video capture deviceThere is the shake of certain limit, improved the robustness of video capture device. Compare background technology, utilizeThe present invention can make process of the test more simple and easy to do.
Slurry form parameter and the song that is related to the time thereof are measured and calculated to the embodiment of the present inventionLine, this form parameter includes but not limited to fluidity etc. The wherein physics of the change of shape representative of curveThe numerical simulation that meaning is follow-up Bingham fluid provides strong instrument support.
Although the embodiment of the present invention has been used clean slurry for test material, using clean slurry slump divergence cylinder is examinationTest equipment, but time also can use other material and equipment, as concrete material and Control Measures for Concrete Slump expandLatitude of emulsion cylinder. The technical methods of the image processing the present invention includes etc., are all not limited to the method for above-described embodiment.Although there is no in embodiments of the present invention exhaustive possible all material, equipment and image processing method,It will be apparent to those skilled in the art that these materials, equipment and image processing software are all in the embodiment of the present inventionWithin spirit and scope.
More than lift preferred embodiment, the object, technical solutions and advantages of the present invention have been carried out further in detailDescribe in detail brightly, institute it should be understood that and the foregoing is only preferred embodiment of the present invention, not in order toRestriction the present invention, within the spirit and principles in the present invention all, any amendment of doing, be equal to replace andImprove etc., within all should being included in protection scope of the present invention.
Claims (8)
1. measure slurry form parameter and a time dependent method thereof, it is characterized in that, comprising:
The phase of object of reference mark or fixation test base plate and video capture device is set on base plate in testTo position relationship;
Video capture device is captured in the slurry carrying out on test base plate and flows after video, sends to video to readTaking equipment;
Video fetch equipment reads the mobile video of slurry, according to the object of reference mark arranging on test base plateKnow, or described relative position relation calculates after the space transformation matrix information of described video, to lookingFrequently each two field picture in carries out after space matrix variation, reads the slurry form parameter in each frame videoAnd current time data, obtain the form parameter of slurry and the variation relation of time.
2. the method for claim 1, is characterized in that, described slurry form parameter comprises slurryThe divergence of body is or/and the expanding area of slurry.
3. the method for claim 1, is characterized in that, described slurry comprises: cement, stoneThe clean pulp material of powder, flyash and slag and water and additive composition;
Or the mixture of multiple types powder solid and liquid composition is starched only, and described mixture is cleanSlurry adds the mortar and the concrete material that after solid material, form.
4. the method for claim 1, is characterized in that, described object of reference is designated default figurePicture maybe can be measured the object of form parameter;
The process of the described space transformation matrix information that calculates described video is:
Maybe can measure the form parameter of the object of form parameter according to default image, and default image or canPosition and the shape information of the object of measurement form parameter in video image, calculates described videoSpace transformation matrix information.
5. the method for claim 1, is characterized in that, described fixation test base plate and videoThe relative position relation of collecting device is:
The camera lens of fixed video collecting device and relative position and the angle of test between base plate, described in measurementRelative position and angle between the camera lens of video capture device and test base plate obtain.
The process of the described space transformation matrix information that calculates described video is:
According to described relative position relation information, determine relative between test base plate and video capture devicePosition and angle, calculate the space transformation matrix information of described video.
6. the method for claim 1, is characterized in that, described video capture device and videoFetch equipment is integrated in an equipment;
Or video capture device is connected by wired or wireless mode with video fetch equipment.
7. the method for claim 1, is characterized in that, the method also comprises:
Image in described video is carried out to color or/and brightness variation is analyzed.
8. measure slurry form parameter and a time varying system thereof, it is characterized in that, comprising:Test base plate, video acquisition device and video reading device, wherein,
Test base plate, for arranging object of reference mark;
Video acquisition device, flows after video for being captured in the slurry carrying out on test base plate, sends toVideo fetch equipment;
Video fetch equipment, for reading the mobile video of slurry, according to the reference arranging on test base plateDescribed in calculating, looks the relative position relation of thing mark or fixation test base plate and video capture deviceAfter space transformation matrix information frequently, each two field picture in video is carried out, after space matrix variation, readingGet slurry form parameter in each frame video and current time data, the form parameter that obtains slurry withThe variation relation of time.
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| CN108426802A (en) * | 2018-03-28 | 2018-08-21 | 中国建筑材料科学研究总院有限公司 | The device of rheological parameters of fresh mixed concrete is predicted by slump test process |
| CN108761015A (en) * | 2018-05-30 | 2018-11-06 | 国家能源投资集团有限责任公司 | The detecting system of black water parameter |
| CN108776080A (en) * | 2018-03-28 | 2018-11-09 | 中国建筑材料科学研究总院有限公司 | The method for predicting rheological parameters of fresh mixed concrete by slump test process |
| CN112649325A (en) * | 2020-11-27 | 2021-04-13 | 中交第四航务工程局有限公司 | Automatic measurement method and system for concrete expansion |
| CN112906700A (en) * | 2021-01-15 | 2021-06-04 | 重庆交通大学 | Self-compacting concrete image semantic segmentation method and device and data set generation method |
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Application publication date: 20160518 |