CN107194915A - The evaluation method of deleterious particle in aggregate particle - Google Patents
The evaluation method of deleterious particle in aggregate particle Download PDFInfo
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- CN107194915A CN107194915A CN201710266654.2A CN201710266654A CN107194915A CN 107194915 A CN107194915 A CN 107194915A CN 201710266654 A CN201710266654 A CN 201710266654A CN 107194915 A CN107194915 A CN 107194915A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0004—Industrial image inspection
- G06T7/0006—Industrial image inspection using a design-rule based approach
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/13—Edge detection
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Abstract
The evaluation method of deleterious particle, comprises the following steps in a kind of aggregate particle that the present invention is provided：S1. the image of aggregate particle is gathered, and aggregate particle image edge information is obtained according to acquired image；S2. the evaluating of deleterious particle is obtained according to aggregate particle image edge information；S3. the content of deleterious particle and deleterious particle is filtered out according to the evaluating of deleterious particle, wherein, deleterious particle includes elongated piece and sheet-like particle；Pass through the present invention; the accuracy of the result that deleterious particle is evaluated in aggregate particle can be effectively improved; so that it is guaranteed that the performance such as the intensity of concrete, rutting resistance, workability and uniformity; and human intervention is effectively reduced in whole evaluation procedure; while improving evaluation result accuracy; efficiency is greatly improved, human cost is reduced.
Description
Technical field
The present invention relates to a kind of building material evaluation method, more particularly in a kind of aggregate particle deleterious particle evaluation side
Method.
Background technology
Gather materials also known as aggregate, is one of main material of concrete, the Traits of aggregate particle to concrete workability,
Uniformity, wherein, the elongated piece, sheet-like particle in gathering materials are very big to the performance impact of concrete, if elongated piece and piece
Shape particle is mutually overlapped, the gap for causing the fine particle of the other materials in concrete to cannot be introduced between aggregate particle, from
And intensity, rutting resistance, workability and the uniformity of concrete are badly influenced, in the prior art, for aggregate particle
The maximum gauge, minimum straight that shape evaluation takes is manual detection mode, aggregate particle is detected by slide measure method
The parameter value such as footpath and thickness, then judges the gill shape degree of aggregate particle again, filters out deleterious particle and determines harmful
The content of particle, this method workload is big, and efficiency is extremely inefficient, it is even more important that due to excessive in detection process
The participation of human factor, and the factor such as influenceed by the degree of fatigue of staff, its accuracy rate of testing result is low, so that
Cause final concrete performance by serious influence.
Therefore, need badly and propose that a kind of new method solves above-mentioned technical problem.
The content of the invention
In view of this, can be effective it is an object of the invention to provide a kind of evaluation method of deleterious particle in aggregate particle
Improve aggregate particle in deleterious particle evaluate result accuracy, so that it is guaranteed that the intensity of concrete, rutting resistance and easily
Property and the performance such as uniformity, and effectively reduce human intervention in whole evaluation procedure, improve evaluation result accuracy
Meanwhile, efficiency is greatly improved, human cost is reduced.
The evaluation method of deleterious particle, comprises the following steps in a kind of aggregate particle that the present invention is provided：
S1. the image of aggregate particle is gathered, and aggregate particle image edge information is obtained according to acquired image；
S2. the evaluating of deleterious particle is obtained according to aggregate particle image edge information；
S3. the content of deleterious particle and deleterious particle is filtered out according to the evaluating of deleterious particle, wherein, harmful
Grain includes elongated piece and sheet-like particle.
Further, evaluating includes the flat shape index Y of aggregate particlei, particle maximum dimension Dimax, particle it is minimum
Diameter Dimin, particle thickness HiAnd the average diameter D of particleimean, wherein, the flat shape index Y of aggregate particleiRefer to
The major axis of the equivalent ellipsoidal of aggregate particle and the ratio of short axle, i represent i-th each particle in sample.
Further, in step S3, elongated piece is evaluated according to following method：
S3a1. aggregate particle i maximum gauge and the ratio X of minimum diameter are asked fori：
S3a2. the ratio X of all aggregate particles is asked foriError σ between plane shape index1：
S3a3. calculation error correction factor δ：
S3a4. needle-like coefficient Z is calculatedi：
Work as σ1>σ′1, then：Zi=Yi+δ；
Work as σ1≤σ′1, then：Zi=Yi, wherein, σ '1For setting error threshold；
S3a5. according to needle-like coefficient ZiWhether judge aggregate particle is elongated piece：
If 1≤Zi<2, then current aggregate particle is ideal granule；
If 2≤Zi<2.4, then current aggregate particle is needle-like trend particle；
If Zi>=2.4, then current aggregate particle is elongated piece.
Further, in step S3, sheet-like particle is evaluated according to following method：
S3b1. the sheet FACTOR P of aggregate particle is calculatedi：
S3b2. according to sheet FACTOR PiWhether judge aggregate particle is sheet-like particle：
If：0<Pi≤ 0.4, current aggregate particle is sheet-like particle；
If：0.4<Pi≤ 0.5, current aggregate particle is sheet trend particle；If：0.5<Pi≤ 1, current aggregate particle is
Ideal granule.
Further, the joint judge index of flat-elongated particles is set up：
The needle-like degree of aggregate particle is represented by equation below：
The sheet degree of aggregate particle is represented by equation below：
The gill shape degree of aggregate particle is then represented by equation below：
Wherein, i represents i-th of aggregate particle, works as ciWhen=0, it is preferable full particle to show the particle；Work as ci=1
When, it is slight needle-like or slight sheet-like particle to show the particle；Work as ciWhen=2, it is slight flat-elongated particles, pin to show the particle
Shape particle or sheet-like particle；Work as ciWhen=3, show that the particle adds slight sheet-like particle or sheet to add slight needle-like for needle-like
Grain；Work as ciWhen=4, it is flat-elongated particles to show the particle；And work as ciAggregate particle is deleterious particle when >=2.
Further, the content of deleterious particle in aggregate particle is evaluated by the following method：
Wherein, α represents content of the deleterious particle in aggregate particle, VzRepresent the volume of aggregate particle；ViRepresent harmful
The volume of grain.
Further, aggregate particle image edge information is obtained according to following method：
S11. gradient vectors of the aggregate particle image f (x, y) in pixel (x, y) is set up
Wherein, Gx(x, y) represents grain edges point in image
First-order difference in the x direction, Gy(x, y) represents the first-order difference of grain edges point in y-direction in image；
S12. gradient amplitude is calculated
Wherein, mag { } is amplitude function；
S13. by the gradient magnitude calculatedIt is compared with the threshold value of setting, ifGreatly
In the threshold value of setting, then it is assumed that pixel (x, y) is the marginal point of image of gathering materials.
Beneficial effects of the present invention：By means of the invention it is possible to effectively improve the result that deleterious particle is evaluated in aggregate particle
Accuracy, so that it is guaranteed that the performance such as the intensity of concrete, rutting resistance, workability and uniformity, and entirely commenting
Human intervention is effectively reduced during valency, while improving evaluation result accuracy, efficiency is greatly improved, reduces human cost.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples：
Fig. 1 is flow chart of the invention.
Fig. 2 is the schematic diagram of the flat shape index of the present invention.
Fig. 3 for the present invention in introduce correction factor before ratio XiWith flat shape index YiCurve map.
Fig. 4 for the present invention in introduce correction factor after ratio XiWith flat shape index YiCurve map.
Embodiment
Fig. 1 for the present invention flow chart, as illustrated, in a kind of aggregate particle for providing of the present invention deleterious particle evaluation
Method, comprises the following steps：
S1. the image of aggregate particle is gathered, and aggregate particle image edge information is obtained according to acquired image；This hair
In bright, the image of aggregate particle is gathered by video camera etc., and when gathering image, image scaled is set to 1:1 pattern；
S2. the evaluating of deleterious particle is obtained according to aggregate particle image edge information；
S3. the content of deleterious particle and deleterious particle is filtered out according to the evaluating of deleterious particle, wherein, harmful
Grain includes elongated piece and sheet-like particle；By means of the invention it is possible to effectively improve the result that deleterious particle is evaluated in aggregate particle
Accuracy, so that it is guaranteed that the performance such as the intensity of concrete, rutting resistance, workability and uniformity, and entirely commenting
Human intervention is effectively reduced during valency, while improving evaluation result accuracy, efficiency is greatly improved, reduces human cost.
In the present embodiment, evaluating includes the flat shape index Y of aggregate particlei, particle maximum dimension Dimax, particle
Minimum diameter Dimin, particle thickness HiAnd the average diameter D of particleimean, wherein, the flat shape index Y of aggregate particlei
Refer to the major axis of the equivalent ellipsoidal of aggregate particle and the ratio of short axle, i represents i-th each particle in sample；The collection of above-mentioned parameter,
Input an image into IPP (the English Integrated Performance Primitives abbreviations in software platform function storehouse),
By IPP to being analyzed and processed according to image edge information, above-mentioned parameter is obtained, belongs to prior art, wherein, flat shape refers to
Number refers to the ratio between major axis and short axle of the equivalent ellipsoidal of aggregate particle image, and the equivalent ellipsoidal and particle figure of aggregate particle image
As having identical area, identical first order and second order moments；As shown in Fig. 2 the white portion in wherein Fig. 2 is to gather materials
The image of grain, and the ellipse of grey is the equivalent ellipsoidal of the aggregate particle.
In the present embodiment, in step S3, elongated piece is evaluated according to following method：
S3a1. aggregate particle i maximum gauge and the ratio X of minimum diameter are asked fori：
S3a2. the ratio X of all aggregate particles is asked foriError σ between plane shape index1：
S3a3. calculation error correction factor δ：
S3a4. needle-like coefficient Z is calculatedi：
Work as σ1>σ′1, then：Zi=Yi+δ；
Work as σ1≤σ′1, then：Zi=Yi, wherein, σ '1For setting error threshold, in general, σ '1For 5%, that is to say, that
As error σ1During less than 5%, then error current can be neglected, directly makes Zi=Yi；
S3a5. according to needle-like coefficient ZiWhether judge aggregate particle is elongated piece：
If 1≤Zi<2, then current aggregate particle is ideal granule；
If 2≤Zi<2.4, then current aggregate particle is needle-like trend particle；
If Zi>=2.4, then current aggregate particle is elongated piece；, can be exactly by aggregate particle by the above method
In elongated piece screen, so that it is guaranteed that the shape of aggregate particle meets the performance requirement of concrete；In the present embodiment,
As shown in Figures 2 and 3, before correction factor is introduced, ratio XiError is larger between plane shape index curve, width in Fig. 2
The larger curve of value is ratio Xi, the less curve of amplitude is flat shape exponential curve, after correction factor is introduced, two songs
Line is substantially coincident, so that error is efficiently reduced, so as to ensure the accuracy of final appraisal results.
In the present embodiment, in step S3, sheet-like particle is evaluated according to following method：
S3b1. the sheet FACTOR P of aggregate particle is calculatedi：
S3b2. according to sheet FACTOR PiWhether judge aggregate particle is sheet-like particle：
If：0<Pi≤ 0.4, current aggregate particle is sheet-like particle；
If：0.4<Pi≤ 0.5, current aggregate particle is sheet trend particle；
If：0.5<Pi≤ 1, current aggregate particle is ideal granule.
In the present embodiment, the joint judge index of flat-elongated particles is set up：
The needle-like degree of aggregate particle is represented by equation below：
The sheet degree of aggregate particle is represented by equation below：
The gill shape degree of aggregate particle is then represented by equation below：
Wherein, i represents i-th of aggregate particle, works as ciWhen=0, it is preferable full particle to show the particle；Work as ci=1
When, it is slight needle-like or slight sheet-like particle to show the particle；Work as ciWhen=2, it is slight flat-elongated particles, pin to show the particle
Shape particle or sheet-like particle；Work as ciWhen=3, show that the particle adds slight sheet-like particle or sheet to add slight needle-like for needle-like
Grain；Work as ciWhen=4, it is flat-elongated particles to show the particle；And work as ciAggregate particle is deleterious particle when >=2, in fact, in reality
In the aggregate particle on border, aggregate particle can both show acicular nature, and laminar character can be shown again, by the above method, from
And the flat-elongated particles in aggregate particle can be found out exactly, it is ensured that final concrete performance；In the present embodiment, Zi
Span is small, and this is due to the screening stringency that this processing mode improves elongated piece, and with the present embodiment
Span is optimal, can both ensure the quality of final screening, is also prevented from excessive value and causes final competition
As a result abnormality, that is to say, that span is too small, causes the aggregate particle for meeting construction requirement in aggregate particle to be missed
It is considered deleterious particle.
In the present embodiment, the content of deleterious particle in aggregate particle is evaluated by the following method：
Wherein, α represents content of the deleterious particle in aggregate particle, VzRepresent the volume of aggregate particle；ViRepresent harmful
The volume of grain, wherein：
In the definition of deleterious particle content：
In formula：α is the flat-elongated particles content gathered materials；
mzFor the quality of flat-elongated particles in the sample that gathers materials；
M is the quality of sample of gathering materials；
In the prior art, filtered out first using slide measure method after deleterious particle, then by weighing deleterious particle matter
The gross mass of amount and sample, finally draws deleterious particle content, and this method has the disadvantage all exist during screening, weighing
The collective effect of larger error, i.e. instrument error and human error is so as to cause the inaccuracy of final result.
In general, the density of aggregate particle that the same collection field that gathers materials gathers out be substantially it is consistent, herein
On the basis of, the volume of aggregate particle can be calculated using equation below：
In formula：ViFor the volume of i-th of aggregate particle；
SiTo pass through the area of IPP i-th of the aggregate particle measured；
HiTo pass through the thickness value of the IPP aggregate particles measured；
According to the mass formula of object：mi=ρ × Vi, wherein, ρ is the density of aggregate particle, miFor the i-th aggregate particle
Quality；Therefore, the content of deleterious particle:
By above-mentioned
Method, can substantially reduce human cost and improve operating efficiency, and can improve the accuracy of content assessment.
In the present embodiment, aggregate particle image edge information is obtained according to following method：
S11. gradient vectors of the aggregate particle image f (x, y) in pixel (x, y) is set up
Wherein, Gx(x, y) represents grain edges in image
The first-order difference of point in the x direction, Gy(x, y) represents the first-order difference of grain edges point in y-direction in image；
S12. gradient amplitude is calculated
Wherein, mag { } is amplitude function；
S13. by the gradient magnitude calculatedIt is compared with the threshold value of setting, ifGreatly
In the threshold value of setting, then it is assumed that pixel (x, y) is the marginal point for the image that gathers materials, and in the present invention, passes through sobel gradient operators
Calculate Gx(x, y) and Gy(x, y), so as to finally draw gradient magnitudeAnd sobel gradient operators and amplitude
Function is prior art, and not in this to go forth.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
The present invention is described in detail good embodiment, it will be understood by those within the art that, can be to skill of the invention
Art scheme is modified or equivalent substitution, and without departing from the objective and scope of technical solution of the present invention, it all should cover at this
Among the right of invention.
Claims (7)
1. the evaluation method of deleterious particle in a kind of aggregate particle, it is characterised in that：Comprise the following steps：
S1. the image of aggregate particle is gathered, and aggregate particle image edge information is obtained according to acquired image；
S2. the evaluating of deleterious particle is obtained according to aggregate particle image edge information；
S3. the content of deleterious particle and deleterious particle is filtered out according to the evaluating of deleterious particle, wherein, deleterious particle bag
Include elongated piece and sheet-like particle.
2. according to claim 1 in aggregate particle deleterious particle evaluation method, it is characterised in that：Evaluating includes collection
Expect the flat shape index Y of particlei, particle maximum dimension Dimax, particle minimum diameter Dimin, particle thickness HiAnd particle
Average diameter Dimean, wherein, the flat shape index Y of aggregate particleiRefer to the major axis of the equivalent ellipsoidal of aggregate particle and short
The ratio of axle, i represents i-th each particle in sample.
3. according to claim 2 in aggregate particle deleterious particle evaluation method, it is characterised in that：In step S3, according to
Following method evaluates elongated piece：
S3a1. aggregate particle i maximum gauge and the ratio X of minimum diameter are asked fori：
S3a2. the ratio X of all aggregate particles is asked foriError σ between plane shape index1：
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S3a3. calculation error correction factor δ：
S3a4. needle-like coefficient Z is calculatedi：
Work as σ1>σ′1, then：Zi=Yi+δ；
Work as σ1≤σ′1, then：Zi=Yi, wherein, σ '1For setting error threshold；
S3a5. according to needle-like coefficient ZiWhether judge aggregate particle is elongated piece：
If 1≤Zi<2, then current aggregate particle is ideal granule；
If 2≤Zi<2.4, then current aggregate particle is needle-like trend particle；
If Zi>=2.4, then current aggregate particle is elongated piece.
4. according to claim 3 in aggregate particle deleterious particle evaluation method, it is characterised in that：In step S3, according to
Following method evaluates sheet-like particle：
S3b1. the sheet FACTOR P of aggregate particle is calculatedi：
S3b2. according to sheet FACTOR PiWhether judge aggregate particle is sheet-like particle：
If：0<Pi≤ 0.4, current aggregate particle is sheet-like particle；
If：0.4<Pi≤ 0.5, current aggregate particle is sheet trend particle；
If：0.5<Pi≤ 1, current aggregate particle is ideal granule.
5. according to claim 4 in aggregate particle deleterious particle evaluation method, it is characterised in that：Set up flat-elongated particles
Joint judge index：
The needle-like degree of aggregate particle is represented by equation below：
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The sheet degree of aggregate particle is represented by equation below：
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The gill shape degree of aggregate particle is then represented by equation below：
Wherein, i represents i-th of aggregate particle, works as ciWhen=0, it is preferable full particle to show the particle；Work as ciWhen=1, table
The bright particle is slight needle-like or slight sheet-like particle；Work as ciWhen=2, it is slight flat-elongated particles, needle-like to show the particle
Grain or sheet-like particle；Work as ciWhen=3, show that the particle adds slight sheet-like particle or sheet to add slight elongated piece for needle-like；Work as ci
When=4, it is flat-elongated particles to show the particle；And work as ciAggregate particle is deleterious particle when >=2.
6. according to claim 5 in aggregate particle deleterious particle evaluation method, it is characterised in that：Comment by the following method
The content of deleterious particle in valency aggregate particle：
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Wherein, α represents content of the deleterious particle in aggregate particle, VzRepresent the volume of aggregate particle；ViRepresent deleterious particle
Volume.
7. according to claim 1 in aggregate particle deleterious particle evaluation method, it is characterised in that：Obtained according to following method
Take aggregate particle image edge information：
S11. gradient vectors of the aggregate particle image f (x, y) in pixel (x, y) is set up
Wherein, Gx(x, y) represents that grain edges point is in x in image
First-order difference on direction, Gy(x, y) represents the first-order difference of grain edges point in y-direction in image；
S12. gradient amplitude is calculated
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Wherein, mag { } is amplitude function；
S13. by the gradient magnitude calculatedIt is compared with the threshold value of setting, ifMore than setting
Fixed threshold value, then it is assumed that pixel (x, y) is the marginal point of image of gathering materials.
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