CN103163136A - Method for distinguishing concrete working degree in real time by virtue of mixing process image - Google Patents
Method for distinguishing concrete working degree in real time by virtue of mixing process image Download PDFInfo
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- CN103163136A CN103163136A CN2013100963207A CN201310096320A CN103163136A CN 103163136 A CN103163136 A CN 103163136A CN 2013100963207 A CN2013100963207 A CN 2013100963207A CN 201310096320 A CN201310096320 A CN 201310096320A CN 103163136 A CN103163136 A CN 103163136A
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Abstract
The invention discloses a method for distinguishing concrete working degree in real time by virtue of a mixing process image in the technical field of concrete working degree detecting techniques, which is used for providing a decision basis for adjustment of mix proportion in a mixing process. The method comprises the steps of acquiring image information of concrete in real time in the mixing process of a mixer; acquiring the shape characteristic of the concrete according to the image information of the concrete; and distinguishing the working degree of the concrete according to the shape characteristic of the concrete. The method provided by the invention can be used for distinguishing the working degree in the concrete mixing process, thus improving the mix proportion design efficiency in a laboratory, and reducing waste on economy and time caused by unqualified working degree of the concrete in a construction site.
Description
Technical field
The invention belongs to concrete work degree detection technique field, relate in particular to a kind of method that procedural image real time discriminating concrete work degree is mixed and stirred in utilization.
Background technology
Concrete serviceability detects for concrete mix-design and guarantees that construction quality is very important.Concrete various workability index (comprising the slump, slump divergence, V funnel time, T50 time etc.) can adopt the tests such as the test of slump divergence, V funnel testing (or T50 test) to detect.Also there are in addition various knockdown concrete work degree determining instruments uniformly concrete and various serviceability to be detected.As a rule, after each tray concrete goes out machine, (before building) all will carry out the workability check.
Although there are various ways that concrete work in every degree index is estimated, all measurement means are all to carry out the measurement of workability index with corresponding detecting instrument by relevant testing staff after concrete goes out machine.This brings three class problems: the one, lost labor and time, interrupted the possible continuous production of concrete; The 2nd, to provide all kinds of detecting instruments and smooth place for detecting at building-site; The 3rd, testing is after going out machine, and so whole tray concrete can only not discarded in case serviceability does not meet the demands.Therefore, at present in the urgent need to a kind of can be in the process of mixing and stirring the method for automatic discrimination concrete work degree in real time.
Summary of the invention
In order to overcome shortcomings and deficiencies of the prior art, the object of the present invention is to provide a kind of concrete work degree method of discrimination, the method can be when the process of mixing and stirring be carried out the concrete workability of real time discriminating.
To achieve these goals, the technical scheme that the present invention proposes is, the method for procedural image real time discriminating concrete work degree is mixed and stirred in a kind of utilization, it is characterized in that, described method comprises:
Step 1: mix and stir the concrete image information of Real-time Collection in process at stirring machine;
Step 2: shape facility concrete according to concrete image information acquisition;
Step 3: differentiate concrete workability according to concrete shape facility.
The inner edge boundary line that described concrete shape facility is concrete image information and/or the boundary line, outside of concrete image information.
Describedly differentiate concrete workability according to concrete shape facility and specifically judge concrete workability according to the inner edge boundary line of concrete image information and the boundary line, outside of concrete image information.
Describedly differentiate concrete workability according to concrete shape facility and specifically judge concrete workability according to the inner edge boundary line of concrete image information or the boundary line, outside of concrete image information.
The method that the present invention proposes can be carried out the differentiation of workability in mixing concrete, can the adjustment for match ratio provide decision-making foundation in whipping process on this basis, thereby greatly improve the efficient of laboratory mix-design and reduce building-site due to the defective economy that causes of concrete work degree and temporal waste.
Description of drawings
Fig. 1 is the schematic diagram that stirring machine mixes and stirs the concrete image information of Real-time Collection in process;
Fig. 2 is a frame key frame images of the process of mixing and stirring that in embodiment 1, image capture device is taken;
Fig. 3 utilizes image and its former frame image in Fig. 2 to carry out the image that the image reducing obtains the difference of two two field pictures;
Fig. 4 carries out global threshold to Fig. 3 to cut apart the bianry image that obtains;
Fig. 5 is the outer boundary line image that separates from concrete image information;
Fig. 6 is the inner boundary line image that separates from concrete image information;
Fig. 7 is that the average height difference between inner edge boundary line and boundary line, outside is calculated schematic diagram;
Fig. 8 is a frame key frame images of the process of mixing and stirring that in embodiment 2, image capture device is taken;
The figure as a result that Fig. 9 utilizes least square method that boundary line, the outside match of image shown in Fig. 8 is obtained.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment is elaborated.Should be emphasized that, following explanation is only exemplary, rather than in order to limit the scope of the invention and to use.
Embodiment 1: utilize inner edge boundary line and boundary line, outside in concrete image information to judge concrete slump divergence.
Concrete implementation step comprises:
Step 1: mix and stir the concrete image information of Real-time Collection in process at stirring machine.
Gather concrete image information and can be above the stirring machine material outlet or stir collecting device (can obtain the equipment of stirring machine inner concrete shape facility as video camera, camera, thermal camera or other) is set in cabin, lighting device is set in case of necessity, the shape information of Real-time Collection concrete in stirring machine when the process of mixing and stirring is carried out.
Fig. 1 is the schematic diagram that stirring machine mixes and stirs the concrete image information of Real-time Collection in process.As shown in Figure 1, at the other support 1002 that arranges of concrete mixer 1001.Still image collecting device 1003(arranges lighting source 1004 in case of necessity on support), make image capture device can photograph by the material outlet of stirring machine the stirring machine internal image.Use stirring machine to mix and stir concrete, when the process of mixing and stirring is carried out, use image capture device take the realtime graphic of the process of mixing and stirring and image transmitting is arrived in coupled opertaing device (computer) 1005.Opertaing device utilizes the workability of image processing method real time discriminating stirring machine inner concrete.
Step 2: shape facility concrete according to concrete image information acquisition.Shape facility concrete according to concrete image information acquisition be specifically: from concrete image information, inner edge boundary line and boundary line, outside are separated.
Fig. 2 is a frame key frame images of the process of mixing and stirring of image capture device shooting.As shown in Figure 2, inner edge boundary line and boundary line, outside refer to that the concrete mixer blade stirs the concrete part of carrying and the separatrix between background in whipping process.Being boundary line, outside (solid white line in Fig. 2) away from the border of stirring arbor, is inner edge boundary line (white dashed line in Fig. 2) near the border of stirring arbor.
(1) obtain boundary line, concrete image information China and foreign countries.
At first, utilize image and its former frame image in Fig. 3 to carry out the image reducing, obtain the poor Δ of two two field pictures, as shown in Figure 3.
Afterwards, the adaptive threshold split plot design of utilizing single threshold is carried out global threshold to Δ and is cut apart and obtain the bianry image Δ
BAs shown in Figure 4.
At last, for Δ
B, obtain the peak of each row in the display foreground pixel as outer boundary, as shown in white lines in Fig. 5.
(2) obtain inner edge boundary line in concrete image information.
At first, utilize the adaptive threshold of dual threshold to cut apart two threshold values of height of finding the solution image shown in Figure 2.
Secondly, use two threshold values calculating to carry out watershed segmentation to image shown in Figure 2.
At last, with the net result of watershed algorithm as the inner edge boundary line, as shown in Fig. 6 solid line.
Step 3: judge concrete slump divergence according to inner edge boundary line and boundary line, outside.
Utilize the concrete slump divergence of the common judgement in inner edge boundary line and boundary line, outside specifically:
At first, the average height difference between calculating inner edge boundary line and boundary line, outside.
Average height difference between inner edge boundary line and boundary line, outside adopts formula:
Calculate.As shown in Figure 7, A is the area of enclosing region between inner edge boundary line and boundary line, outside, and d is regional transverse width for this reason.
Then, calculate concrete slump divergence according to the average height difference between inner edge boundary line and boundary line, outside.Its formula is as follows:
Wherein, H
avgBe the inner and outer boundary line average height difference of utilizing formula (1) to obtain, a, b and c are the constant (in the present embodiment, a=285, b=0.3011, c=-0.4116) that test is determined, W/C is concrete volume water-cement ratio.The inner and outer boundary average height difference that obtains from image in the present embodiment is 208mm, and the slump divergence that calculates according to formula (2) is 697mm, and the actual tests result of using the test of slump divergence to obtain is 690mm.The slump divergence can judge that concrete slump divergence meets the demands within the scope of regulation and stipulation.
Embodiment 2: utilize the boundary line, outside to judge the concrete V funnel time.
Concrete implementation step comprises:
Step 1: mix and stir the concrete image information of Real-time Collection in process at stirring machine.Detailed implementation process is described with the step 1 of embodiment 1.Fig. 8 is a frame key frame images of using the process of mixing and stirring of image capture device shooting in the present embodiment.
Step 2: shape facility concrete according to concrete image information acquisition.Shape facility concrete according to concrete image information acquisition be specifically:
From concrete image information, the boundary line, outside is separated.Detailed implementation process is with embodiment 1 step 2(1) described in.
Step 3: judge the concrete V funnel time according to the boundary line, outside.
At first, utilize least square method external boundary line to carry out match, the flex point horizontal ordinate in the boundary line, outside after digital simulation.
Utilize the Logistic equation to carry out least square regression to outer boundary, wherein the Logistic equation form is as follows:
A, b, c and d are regression parameter.
For the boundary line, outside from Fig. 8, utilize least square fitting to become the Logistic curve.The curve equation of match is:
Fitting result as shown in Figure 9.Point range on the boundary line, outside that the figure orbicular spot represents to obtain with the image treating method, curve is for returning the Logistic curve that obtains.
Secondly, the Logistic point of inflexion on a curve horizontal ordinate that digital simulation goes out, its computing formula is as follows:
Wherein, X
infBe the flex point horizontal ordinate in the boundary line, outside after match, c and d are corresponding regression parameter in formula (4).In Fig. 9, the triangle form point is the outer boundary point of inflexion on a curve after match.
At last, judge the concrete V funnel time according to boundary line, the outside flex point horizontal ordinate after match.
According to test findings, work as X
inf＞200 o'clock, the V funnel time will over 25s, namely surpass the requirement of standard.Can use formula (5) to calculate the flex point horizontal ordinate X of the present embodiment outer boundary
inf=607.Therefore judge that in the present embodiment, the concrete V funnel time surpasses 25s.The actual tests result of using the V funnel testing to obtain is 76.5s, thereby concrete workability exceeds code requirement.
Should be noted that, in above-described embodiment 1 and 2, obtaining the process in concrete image information boundary line, China and foreign countries and inner edge boundary line, is only the example that the present invention proposes, and obtains concrete image information boundary line, China and foreign countries and inner edge boundary line and is not limited to said process.In addition, the slump divergence of using in the present invention and V funnel Method Of Time Measurement are formulated " self-compacting concrete application technology rules " (CECS203:2006) according to China Engineering Construction Standardization Association.
The beneficial effect of method provided by the invention is:
1. the method that the workability when having proposed to utilize shape information to mixing concrete is analyzed possesses real-time, robotization and contactless characteristics.
2. utilize concrete inner and outer boundary wire shaped information that blade of stirrer stirs to differentiate the method for concrete work degree, can replace traditional concrete work degree to detect test, be applied to engineering site and laboratory examination.
3. the concrete work degree method of discrimination of the present invention's proposition has been simplified trace routine, can save a large amount of manpowers and time, for concrete production robotization and serialization truly provides the foundation.
4. the concrete work degree method of discrimination of the present invention's proposition can carry out the differentiation of workability in mixing concrete, can the adjustment for match ratio provide decision-making foundation in whipping process on this basis, can greatly improve the efficient of laboratory mix-design and reduce building-site due to the defective economy that causes of concrete work degree and temporal waste.
The above; only for the better embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement are within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (4)
1. the method that procedural image real time discriminating concrete work degree is mixed and stirred in utilization, is characterized in that, described method comprises:
Step 1: mix and stir the concrete image information of Real-time Collection in process at stirring machine;
Step 2: shape facility concrete according to concrete image information acquisition;
Step 3: differentiate concrete workability according to concrete shape facility.
2. method according to claim 1, is characterized in that, the inner edge boundary line that described concrete shape facility is concrete image information and/or the boundary line, outside of concrete image information.
3. method according to claim 2, it is characterized in that, describedly differentiate concrete workability according to concrete shape facility and specifically judge concrete workability according to the inner edge boundary line of concrete image information and the boundary line, outside of concrete image information.
4. method according to claim 2, it is characterized in that, describedly differentiate concrete workability according to concrete shape facility and specifically judge concrete workability according to the inner edge boundary line of concrete image information or the boundary line, outside of concrete image information.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN112892823A (en) * | 2021-01-15 | 2021-06-04 | 清华大学 | Sand making control method and system based on artificial intelligence algorithm |
| CN115890915A (en) * | 2023-01-06 | 2023-04-04 | 山东天意装配式建筑装备研究院有限公司 | Image recognition method for concrete mixing process |
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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 |
| CN112892823A (en) * | 2021-01-15 | 2021-06-04 | 清华大学 | Sand making control method and system based on artificial intelligence algorithm |
| CN115890915A (en) * | 2023-01-06 | 2023-04-04 | 山东天意装配式建筑装备研究院有限公司 | Image recognition method for concrete mixing process |
| CN115890915B (en) * | 2023-01-06 | 2023-05-09 | 山东天意装配式建筑装备研究院有限公司 | Image recognition method in concrete mixing process |
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