CN109307679A - A kind of detection method, detection device and the terminal device of concrete void depth - Google Patents
A kind of detection method, detection device and the terminal device of concrete void depth Download PDFInfo
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- CN109307679A CN109307679A CN201811348590.1A CN201811348590A CN109307679A CN 109307679 A CN109307679 A CN 109307679A CN 201811348590 A CN201811348590 A CN 201811348590A CN 109307679 A CN109307679 A CN 109307679A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/20—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by using diffraction of the radiation by the materials, e.g. for investigating crystal structure; by using scattering of the radiation by the materials, e.g. for investigating non-crystalline materials; by using reflection of the radiation by the materials
Abstract
The present invention is suitable for concrete void detection technique field, provide detection method, detection device and the terminal device of a kind of concrete void depth, wherein, method includes: the first thermal neutron counting rate for obtaining thermal-neutron detector and detecting in the first preset duration of current location；According to the first thermal neutron counting rate, judges that the concrete whether there is and come to nothing；It comes to nothing if the concrete that the concrete there is no coming to nothing, detects the next position whether there is；It comes to nothing if the concrete exists, quantitative detection is carried out to the depth of coming to nothing of the concrete；The detection duration for shortening concrete void depth, improve the detection efficiency of concrete void depth.
Description
Technical field
The invention belongs to concrete void detection technique field more particularly to a kind of detection sides of concrete void depth
Method, detection device and terminal device.
Background technique
In the building such as modern large-scale hydroelectric project, traffic engineering, often has concrete structure and need to make back boxing with steel plate
Or composite force structure, generally there are pressure tunnel or pipe hole, Large-sized Communication immersed tunnel structure, high-speed rail plate etc..For there is pressure tunnel
Hole, Large-sized Communication immersed tunnel structure etc. make to be poured matter due to unavoidable some technological problems in construction and field working conditions limitation
Amount, which is affected, causes concrete to be difficult to fill closely knit, is especially easy to produce cavity defect in steel plate and concrete joint surface.
These cavity defects are the huge hidden danger for directly contributing back lining of steel plate deformation instability damage in project inputs operation, it will serious
Threaten engineering operation safety.In order to guarantee the safety of engineering, it is necessary to a kind of science, efficiently, accurate, safety detection method goes
The position come to nothing and depth are detected, to provide scientific basis for the punching in later period grouting.
After the atomic nucleus of fast neutron and measured medium that neutron source emits collides, it can be slowed down to form heat by slowing down
Neutron simultaneously converges around neutron source.Fast neutron and when material effect, the substance big to atomic weight, which has, very strong penetrates energy
Power, but be easy by the small deceleration of atomic weight and slowing down to form thermal neutron, and since hydrogen atom atomic weight is minimum, it is fast in
Son with easily become thermal neutron after hydrogen atom multiple impacts.Concrete is by gravel aggregate, coarse sand and cement plus a certain amount of
Water mix forms, these water are most of to become water of constitution with cement generation hydration, and a small amount of remaining water is deposited with free state
, therefore include a large amount of hydrogen atoms in concrete, it is a kind of good fast neutron moderator.Since fast neutron is big to atomic weight
Substance has stronger penetration capacity, but can form thermal neutron by the small deceleration of atomic weight and slowing down, and therefore, fast neutron holds very much
Easily through the big substance such as steel plate of atomic weight and with following coagulation soil interaction, and hankered by the formation of concrete deceleration slowing down
Son.Neutron source and thermal-neutron detector are placed in surface of steel plate according to this feature, issue fast neutron across one by neutron source
Determine coagulation soil interaction under the steel plate and steel plate of thickness, fast neutron can be decelerated at this time, slowing down forms thermal neutron, recycle heat
Neutron detector detects thermal neutron counting rate, if steel plate and concrete joint surface generate cavity defect, which is surveyed
The thermal neutron counting rate of examination will change.Specifically, cavity defect depth is bigger, the thermal neutron counting rate detected is lower.
Therefore it based on the thermal neutron counting rate detected, may be implemented to test point with the presence or absence of coming to nothing and the inspection for depth of accordingly coming to nothing
It surveys, here it is the Neutron Scattering Method principles for being used for concrete void detection in the prior art, in architectural engineering, water conservancy and hydropower etc.
Field has played important function.
However, the general area in engineering scene to be measured is all bigger, for detecting concrete void depth in practical application
The concrete area that terminal device can measure every time is smaller, and the statistics of thermal neutron counting rate requires centainly when each measurement
Time, for example, it is assumed that the area that can measure every time of measuring instrument is 30cm × 30cm, the face measured needed for engineering scene to be measured
Product is 200m2, measurement needs 2 minutes every time, then needs to complete for actual measurement at least 2000 times to be measured to engineering existing
The measurement of field, it is at least 50 hours or more time-consuming, therefore, when currently, detecting concrete void depth using Neutron Scattering Method have
The lower problem of efficiency.
Summary of the invention
In view of this, the embodiment of the invention provides detection method, detection device and the ends of a kind of concrete void depth
End equipment, when can solve in the prior art using Neutron Scattering Method detection concrete void depth, the lower problem of efficiency.
First aspect of the embodiment of the present invention provides a kind of detection method of concrete void depth, and this method is applied to eventually
End equipment, the terminal device include neutron source and thermal-neutron detector, and the neutron source is used to be covered with steel plate to surface
Concrete emits fast neutron, and the thermal-neutron detector is located on the steel plate, slow through the concrete for detecting fast neutron
Change becomes the thermal neutron counting rate after thermal neutron；The detection method of the concrete void depth includes:
Obtain the first thermal neutron counting rate that thermal-neutron detector detects in the first preset duration of current location；
According to the first thermal neutron counting rate, judges that the concrete whether there is and come to nothing；
It comes to nothing if the concrete that the concrete there is no coming to nothing, detects the next position whether there is；
It comes to nothing if the concrete exists, quantitative detection is carried out to the depth of coming to nothing of the concrete current location.
Second aspect of the embodiment of the present invention provides a kind of detection device of concrete void depth, which is configured at end
End equipment, including neutron source and thermal-neutron detector, the concrete transmitting that the neutron source is used to be covered with steel plate to surface are fast
Neutron, the thermal-neutron detector are located on the steel plate, become thermal neutron through the concrete slowing down for detecting fast neutron
Thermal neutron counting rate afterwards；The detection device of the concrete void depth includes:
Acquiring unit is hankered for obtaining thermal-neutron detector detects in the first preset duration of current location first
Sub-count rate；
Judging unit, for judging that the concrete whether there is and coming to nothing according to the first thermal neutron counting rate；
First detection unit, if whether the concrete for detecting the next position is deposited for the concrete there is no coming to nothing
It is coming to nothing；
Second detection unit is come to nothing if existing for the concrete, to the depth of coming to nothing of the concrete current location
Degree carries out quantitative detection.
The third aspect of the embodiment of the present invention provides a kind of terminal device, including memory, processor and is stored in institute
The computer program that can be run in memory and on the processor is stated, the processor executes real when the computer program
The step of existing above-mentioned first aspect the method.
Fourth aspect of the embodiment of the present invention provides a kind of computer readable storage medium, the computer-readable storage medium
Matter is stored with computer program, and the computer program realizes the step of above-mentioned first aspect the method when being executed by processor
Suddenly.
In the embodiment of the present invention, since in engineering scene to be measured, the concrete in generally only a small amount of region, which exists, to come to nothing now
As, most of region concrete there is no come to nothing phenomenon therefore, can be first to coagulation when detecting concrete void depth
Soil depth of coming to nothing carries out rapidly qualitative detection, that is, first obtains thermal-neutron detector and examines in the first preset duration of current location
The the first thermal neutron counting rate measured, and judge that the concrete whether there is according to the first thermal neutron counting rate and come to nothing,
Then, judge concrete exist come to nothing when, then with longer time to the concrete current location come to nothing depth into
Row quantitative detection is come to nothing judging that the concrete whether there is there is no the concrete for when coming to nothing, directly detecting the next position,
Concrete void is improved without the quantitative detection for depth of coming to nothing so as to shorten the detection duration of concrete void depth
The detection efficiency of depth；In addition, being carried out due to when judging concrete in the presence of coming to nothing to the depth of coming to nothing of the concrete
Therefore relatively accurately quantitative detection while improving the detection efficiency of concrete void depth, also improves concrete void
The detection accuracy of depth.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the implementation process schematic diagram of the detection method of concrete void depth provided in an embodiment of the present invention；
Fig. 2 is the first application scenarios schematic diagram of detection concrete void depth provided in an embodiment of the present invention；
Fig. 3 is that judgement concrete provided in an embodiment of the present invention whether there is the implementation process schematic diagram to come to nothing；
Fig. 4 is the implementation process schematic diagram provided in an embodiment of the present invention that quantitative detection is carried out to concrete void depth；
Fig. 5 is the implementation process of acquisition thermal neutron counting rate and the corresponding relationship for depth of coming to nothing provided in an embodiment of the present invention
Schematic diagram；
Fig. 6 is the second application scenarios schematic diagram of detection concrete void depth provided in an embodiment of the present invention；
Fig. 7 is the third application scenarios schematic diagram of detection concrete void depth provided in an embodiment of the present invention；
Fig. 8 is the schematic diagram of the detection device of concrete void depth provided in an embodiment of the present invention；
Fig. 9 is the schematic diagram of the terminal device of the detection provided in an embodiment of the present invention for concrete void depth.
Specific embodiment
In being described below, for illustration and not for limitation, the tool of such as particular system structure, technology etc is proposed
Body details, to understand thoroughly the embodiment of the present invention.However, it will be clear to one skilled in the art that there is no these specific
The present invention also may be implemented in the other embodiments of details.In other situations, it omits to well-known system, device, electricity
The detailed description of road and method, in case unnecessary details interferes description of the invention.
In order to illustrate technical solution of the present invention, the following is a description of specific embodiments.
It is all using neutron source to steel currently, in the technology detected to concrete void depth using neutron scattering
After plate and concrete launch fast neutron, thermal neutron inspection is carried out using single thermal-neutron detector or multiple thermal-neutron detectors
It surveys, to judge in concrete with the presence or absence of coming to nothing and corresponding depth profile.Wherein, mixed using thermal-neutron detector detection
With the presence or absence of coming to nothing and when corresponding depth profile in solidifying soil, generally in such a way that region is detected one by one, to each
Region all spends identical time to carry out causing concrete de- with the presence or absence of coming to nothing and the detection of corresponding depth in concrete
The detection efficiency of empty depth is lower.
In the embodiment of the present invention, since in engineering scene to be measured, the concrete in generally only a small amount of region, which exists, to come to nothing now
As, most of region concrete there is no come to nothing phenomenon therefore, can be first to coagulation when detecting concrete void depth
Soil depth of coming to nothing carries out rapidly qualitative detection, that is, first obtains thermal-neutron detector and examines in the first preset duration of current location
The the first thermal neutron counting rate measured, and judge that the concrete whether there is according to the first thermal neutron counting rate and come to nothing,
Then, it when judging concrete in the presence of coming to nothing, then is carried out quantifying inspection with depth of coming to nothing of the longer time to the concrete
It surveys, comes to nothing judging that the concrete whether there is there is no the concrete for when coming to nothing, directly detecting the next position, without de-
The quantitative detection of empty depth improves the inspection of concrete void depth so as to shorten the detection duration of concrete void depth
Survey efficiency；In addition, having been carried out relatively accurately due to when judging concrete in the presence of coming to nothing to the depth of coming to nothing of the concrete
Therefore quantitative detection while improving the detection efficiency of concrete void depth, also improves the inspection of concrete void depth
Survey precision.
Specifically, a kind of reality of the detection method of concrete void depth provided in an embodiment of the present invention as shown in figure 1
Existing flow diagram, this method are applied to terminal device, can be by the detection of the concrete void depth configured on terminal device
Device executes, suitable for that need to improve the situation of the efficiency using Neutron Scattering Method detection concrete void depth.The concrete
The detection method for depth of coming to nothing includes step 101 to step 104.
Step 101, the first thermal neutron meter that thermal-neutron detector detects in the first preset duration of current location is obtained
Digit rate.
Wherein, as shown in Fig. 2, the terminal device includes neutron source 21 and thermal-neutron detector 22, the neutron source 21
Concrete 24 for being covered with from steel plate 23 to surface emits fast neutron, and the thermal-neutron detector 22 is located at the steel plate 23
On, for detecting thermal neutron counting rate of the fast neutron after the concrete slowing down becomes thermal neutron.
The first thermal neutron counting rate that above-mentioned acquisition thermal-neutron detector detects in the first preset duration of current location
Refer to that terminal device obtains the first thermal neutron counting rate that thermal-neutron detector detects in the first preset duration of current location.
Wherein, current location refers to that thermal-neutron detector is carrying out the concrete region of thermal neutron counting rate detection, for example, the coagulation
Native region is the concrete region of 30cm × 30cm size.
In the embodiment of the present application, above-mentioned first preset duration can according to practical experience set duration, as long as can
Qualitatively detection concrete, which whether there is, comes to nothing, also, first preset duration is less than quantitative detection concrete void depth
The detection duration of degree.
For example, generally the detection of concrete void depth when a length of 1min-2min, above-mentioned first preset duration can be
15s, 20s or 30s.
Step 102, according to the first thermal neutron counting rate, judge that the concrete whether there is and come to nothing.
In the embodiment of the present invention, since in engineering scene to be measured, there is phenomenon of coming to nothing in the concrete in only a small amount of region, greatly
There is no phenomenons of coming to nothing for the concrete of partial region, therefore, when detecting concrete void depth, can first obtain thermal neutron spy
The first thermal neutron counting rate that device detects in the first preset duration of current location is surveyed, and hankers sub-count according to described first
Rate judges that the concrete with the presence or absence of coming to nothing, is realized and carries out rapidly qualitative detection to concrete void depth.
Specifically, judging that the concrete with the presence or absence of when coming to nothing, carries out concrete void depth due to only fast
Therefore first thermal neutron counting rate of acquisition can be directly compared by fast ground qualitative detection with preparatory numerical value, in the first heat
When neutron count rate is greater than or equal to the preparatory numerical value, determine that concrete there is no coming to nothing, is less than in the first thermal neutron counting rate
When the preparatory numerical value, determines that concrete exists and come to nothing.Wherein, which can be the numerical value obtained according to practical experience,
It is also possible to the numerical value measured before engineering survey starts.
Step 103, if the concrete is there is no coming to nothing, the concrete for detecting the next position, which whether there is, to come to nothing.
Step 104, it comes to nothing if the concrete exists, the depth of coming to nothing of the concrete current location is quantified
Detection.
In the embodiment of the present invention, by judge concrete exist come to nothing when, then with longer time to the coagulation
Soil come to nothing depth carry out quantitative detection, judge the concrete there is no come to nothing when, directly detection the next position coagulation
Soil is mentioned with the presence or absence of coming to nothing without the quantitative detection for depth of coming to nothing so as to shorten the detection duration of concrete void depth
The high detection efficiency of concrete void depth；In addition, due to when judging concrete in the presence of coming to nothing, to the concrete
Depth of coming to nothing has carried out relatively accurately quantitative detection, therefore, while improving the detection efficiency of concrete void depth, also mentions
The high detection accuracy of concrete void depth.
Optionally, as shown in figure 3, in some embodiments of the application, in above-mentioned steps 102, according to described first
Thermal neutron counting rate judges that the concrete whether there is and comes to nothing and can specifically include: step 301 to step 302.
Step 301, obtaining thermal-neutron detector, there is no examine in the first preset duration of position come to nothing in the concrete
The the second thermal neutron counting rate measured.
For example, choosing concrete in engineering scene to be measured is not present the position come to nothing, and neutron source is placed in the position
On the steel plate of concrete surface covering, emit fast neutron to concrete, is detected by thermal-neutron detector anti-in the first preset duration
The thermal neutron for injecting detector, obtains above-mentioned second thermal neutron counting rate.
In another example by the concrete sample for obtaining engineering scene to be measured, and it is tight by the surface in the concrete sample
After identical with the steel plate thickness at the engineering scene to be measured steel plate of close covering, it is measured, is hankered using thermal-neutron detector
The the second thermal neutron counting rate detected in the first preset duration of position come to nothing is not present in the concrete for sub- detector.
Step 302, whether the first thermal neutron counting rate is greater than or equal to the second thermal neutron counting rate, if
The first thermal neutron counting rate is greater than or equal to the second thermal neutron counting rate, it is determined that there is no de- for the concrete
It is empty；If the first thermal neutron counting rate is less than the second thermal neutron counting rate, it is determined that the concrete, which exists, to come to nothing.
For example, the first thermal neutron counting rate is A, the second thermal neutron counting rate is B, when A is greater than or equal to B, is determined mixed
Solidifying soil, when A is less than B, determines that concrete exists and comes to nothing there is no coming to nothing.
In the embodiment of the present invention, above-mentioned second thermal neutron counting rate is obtained by measuring before engineering survey starts, in turn
According to the size relation between the first thermal neutron counting rate and the second thermal neutron counting rate, determines that concrete whether there is and comes to nothing,
It can make more accurate with the presence or absence of the qualitative detection come to nothing to concrete.
Optionally, if the above-mentioned first thermal neutron counting rate is less than the second thermal neutron counting rate, it is determined that described
Concrete, which exists, to come to nothing, if can also include: that the first thermal neutron counting rate is less than the second thermal neutron counting rate, counts
Calculate the difference between the first thermal neutron counting rate and the second thermal neutron counting rate；If the difference is greater than or equal to the
One preset threshold, it is determined that the concrete, which exists, to come to nothing；If the difference is less than first preset threshold, it is determined that described
There is no come to nothing concrete.
For example, the first thermal neutron counting rate is A, the second thermal neutron counting rate is B, when A is greater than or equal to B, is determined mixed
Solidifying soil, when A is less than B, calculates B and subtracts A whether less than the first preset threshold C, if B subtracts A more than or equal to first there is no coming to nothing
Preset threshold C, it is determined that the concrete, which exists, to come to nothing；If B subtracts A less than the first preset threshold C, it is determined that the concrete is not
In the presence of coming to nothing.It further improves and determines that the concrete whether there is the accuracy come to nothing.
Optionally, as shown in figure 4, the depth of coming to nothing to the concrete carries out quantitative detection, comprising: step 401
To step 405.
Step 401, obtaining thermal-neutron detector, there is no the positions the come to nothing between the concrete and the steel plate
The thickness and the thermal-neutron detector of the third thermal neutron counting rate, the steel plate that detect in two preset durations are described
The 4th thermal neutron counting rate detected in the second preset duration of current location；Wherein, second preset duration is greater than described
First preset duration.
Above-mentioned second preset duration is the detection duration of quantitative detection concrete void depth, and above-mentioned third hankers sub-count
Rate and the detection method of above-mentioned third thermal neutron counting rate are similar with the detection method of above-mentioned second thermal neutron counting rate, only
Detection duration is changed to the detection duration (the second preset duration) of quantitative detection concrete void depth.
In the embodiment of the present application, terminal device can be connect when determining concrete in the presence of coming to nothing by extending detection time
Obtain the 4th thermal neutron counting rate.
Wherein, the thickness data of steel plate can carry out thickness measure in the steel plate to engineering scene to be measured by technical staff or look into
After readding construction drawing, inputted manually.
Step 402, the corresponding relationship of thermal neutron counting rate corresponding with the thickness of the steel plate with depth of coming to nothing is searched.
Wherein, above-mentioned thermal neutron counting rate and the corresponding relationship for depth of coming to nothing refer to pre-stored and hot steel plate thickness
The corresponding relationship of corresponding neutron count rate and depth of coming to nothing.
Optionally, in above-mentioned steps 402, according to the thickness of steel plate, lookup is corresponding with the thickness of steel plate to hanker sub-count
Rate may include: to be measured to the steel plate of different-thickness, obtain and store every kind of thickness with before the corresponding relationship for depth of coming to nothing
The corresponding relationship of the thermal neutron counting rate of the steel plate of degree and depth of coming to nothing.
Specifically, as shown in figure 5, the above-mentioned steel plate to different-thickness is measured, the heat of the steel plate of every kind of thickness is obtained
Neutron count rate and the corresponding relationship of depth of coming to nothing may include: step 501 to step 502.
Step 501, obtain different-thickness steel plate be closely covered on there is no come to nothing concrete surface when thermal neutron visit
The thermal neutron counting rate that device detects is surveyed, the corresponding benchmark thermal neutron counting rate of steel plate of every kind of thickness is obtained.
For example, as shown in fig. 6, the steel plate sample of thickness H=H1 is closely covered on the concrete sample of surfacing,
The thermal neutron counting rate that thermal-neutron detector detects is collected and recorded, the corresponding benchmark thermal neutron of steel plate with a thickness of H1 is obtained
Counting rate.
Step 502, the steel plate for obtaining different-thickness respectively is closely covered on the concrete surface that there are different depth of coming to nothing
When the thermal neutron counting rate that detects of thermal-neutron detector, obtain the corresponding thermal neutron counting rate of steel plate of every kind of thickness and come to nothing
The corresponding relationship of depth.
For example, as shown in fig. 7, the steel plate sample of thickness H=H1, which is closely covered on surface, comes to nothing depth d's in the presence of difference
On concrete sample, the corresponding thermal neutron counting rate of steel plate and the corresponding relationship for depth of coming to nothing with a thickness of H1 are obtained.
It should be noted that obtaining the thermal neutron counting rate of the steel plate of every kind of thickness and depth of coming to nothing in the embodiment of the present invention
When the corresponding relationship of degree, closely it is covered on by steel plate on the concrete for depth of coming to nothing in the presence of difference and carries out thermal neutron counting rate
Detection, that is, the thermal neutron counting rate of the steel plate of every kind of thickness is measured using the concrete that surface has recess and depth of coming to nothing
Corresponding relationship, rather than heat is measured in such a way that steel plate and concrete surface interval come to nothing depth d similar to as shown in Figure 2
The corresponding relationship of neutron count rate and depth of coming to nothing, so that thermal neutron counting rate and the corresponding relationship for depth of coming to nothing that measurement obtains
More closing to reality application scenarios reduce the error occurred in continuous mode, and further increase concrete void depth
The detection accuracy of degree.
It in the embodiment of the present invention, is measured in the steel plate to different-thickness, obtains the thermal neutron of the steel plate of every kind of thickness
When counting rate and the corresponding relationship for depth of coming to nothing, for the validity of the corresponding relationship improved, the thickness of steel plate can be selected
With steel plate thickness common in engineering, for example, 30mm, 40mm and 50mm etc..Also, concrete surface comes to nothing depth d's
Value range can be defined according to the concrete void depth value surveyed in practical engineering application, and in value range
Inside multiselect takes the different depth d that comes to nothing to be measured respectively to the steel plate of different-thickness as much as possible.
It should be noted that being herein only the thermal neutron counting rate to the steel plate for how obtaining different-thickness and depth of coming to nothing
The corresponding relationship of degree is illustrated, and in practical applications, obtains the thermal neutron counting rate of the steel plate of different-thickness and comes to nothing
The method of the corresponding relationship of depth can be determined according to the actual situation by technical staff, not be limited herein.
For example, in certain embodiments of the present invention, different thickness can also be obtained by way of founding mathematical models
The corresponding relationship of the corresponding thermal neutron counting rate of the steel plate of degree and depth of coming to nothing.
Optionally, above-mentioned thermal neutron counting rate corresponding with the thickness of steel plate with come to nothing depth corresponding relationship can be with
The mapping table of the corresponding thermal neutron counting rate of the thickness of steel plate and depth of coming to nothing.For example, the mapping table is such as 1 institute of table
The mapping table shown.
Optionally, above-mentioned thermal neutron counting rate corresponding with the thickness of steel plate with come to nothing depth corresponding relationship can be with
The curvilinear function of the corresponding thermal neutron counting rate of the thickness of steel plate and depth of coming to nothing.
For example, by thermal neutron counting rate and every group of thermal neutron counting rate in the mapping table for depth of coming to nothing and right therewith
The concrete void depth answered carries out curve fitting, and obtains thermal neutron counting rate corresponding with the thickness of steel plate and depth of coming to nothing
Curvilinear function.
Step 403, the benchmark thermal neutron counting rate in the corresponding relationship is extracted, and calculates the third and hankers sub-count
Ratio between rate and the benchmark thermal neutron counting rate.
In the embodiment of the present invention, detected obtaining the thermal-neutron detector being located on the steel plate of concrete surface covering
Third thermal neutron counting rate N11, and thermal neutron counting rate corresponding with the thickness of steel plate and the corresponding relationship of depth of coming to nothing
Later, by extracting the benchmark thermal neutron counting rate N21 in corresponding relationship, the third thermal neutron counting rate can be calculated
Ratio E=N11/N21 or F=N21/N11 between N11 and benchmark thermal neutron counting rate N21.
Step 404, the 4th thermal neutron counting rate is modified using the ratio, obtains the 5th and hankers sub-count
Rate.
For example, the ratio N11/N21 between third thermal neutron counting rate N11 and benchmark thermal neutron counting rate N21, is being detected
When concrete void depth, the 4th thermal neutron counting rate that thermal-neutron detector detects be N12, N13 ..., N1n, at this point, sharp
The 4th thermal neutron counting rate that thermal-neutron detector detects is modified with ratio, available 5th thermal neutron counting rate
For N12/E, N13/E ..., N1n/E, wherein n is integer greater than 3.
Step 405, the corresponding depth of coming to nothing of the 5th thermal neutron counting rate is determined according to the corresponding relationship.
Wherein, above-mentioned that the corresponding depth of coming to nothing of 5th thermal neutron counting rate is determined according to corresponding relationship, comprising: according to steel
The corresponding thermal neutron counting rate of the thickness of plate determines that the 5th thermal neutron counting rate is corresponding de- with the mapping table for depth of coming to nothing
Empty depth.
For example, the thermal neutron counting rate corresponding with the thickness of steel plate according to shown in above-mentioned table 1 is corresponding with depth of coming to nothing
Relation table indicates the depth of coming to nothing for the concrete that thermal-neutron detector detects as the 5th thermal neutron counting rate N12/E=8000
Degree is 2.5mm.
Optionally, the is determined according to the mapping table of thermal neutron counting rate corresponding with the thickness of steel plate and depth of coming to nothing
The corresponding depth of coming to nothing of five thermal neutron counting rates, comprising: if not recording the 5th thermal neutron counting rate and the 5th in mapping table
The corresponding depth of coming to nothing of thermal neutron counting rate utilizes the 5th thermal neutron counting rate pair of interpolation calculation then according to mapping table
The depth of coming to nothing answered.
Since the steel plate to different-thickness is measured, obtain and store the thermal neutron counting rate of the steel plate of every kind of thickness with
When the corresponding relationship for depth of coming to nothing, the concrete void depth profile that can be simulated all is limited and discrete value, corresponding
Thermal neutron counting rate also necessarily limited and discrete value, therefore, in practical applications, it is most likely that will appear the 5th thermal neutron
Counting rate is not present in the mapping table of pre-stored thermal neutron counting rate corresponding with the thickness of steel plate with depth of coming to nothing
In, for example, pre-stored thermal neutron counting rate corresponding with the thickness of steel plate and the mapping table for depth of coming to nothing are above-mentioned
Mapping table shown in table 1, if the 5th thermal neutron counting rate is 6000, in the mapping table as shown in above-mentioned table 1
The corresponding depth d that comes to nothing of thermal neutron counting rate 6000 has not been recorded, and therefore, it is necessary to hanker sub-count using interpolation calculation the 5th
The corresponding depth d=2.5+ that comes to nothing of rate 6000 [(5.8-2.5)/(8000-5000)] × (8000-6000)=4.7 (mm).
Further, it when being not recorded in above-mentioned mapping table in order to avoid above-mentioned 5th thermal neutron counting rate, needs
It is above-mentioned according to corresponding relationship in the embodiment of the present invention using the corresponding depth of coming to nothing of the 5th thermal neutron counting rate of interpolation calculation
It determines the corresponding depth of coming to nothing of the 5th thermal neutron counting rate, can also include: to be substituting to the 5th thermal neutron counting rate and steel plate
The corresponding thermal neutron counting rate of thickness and the curvilinear function of depth of coming to nothing, it is corresponding de- that the 5th thermal neutron counting rate is calculated
Empty depth.
That is, the embodiment of the present invention only need to choose corresponding curve according to the thickness for the steel plate that concrete surface covers
Function, then count rate ratio is substituting in curvilinear function and is calculated, required concrete void depth can be obtained.
It is above-mentioned to determine that the 5th thermal neutron counting rate is corresponding de- according to corresponding relationship as one embodiment of the present invention
After empty depth, comprising: the position for the concrete void that record detects every time, and the position based on the concrete void being recorded
It sets and generates concrete void areally-distributed data.
Since common engineering scene area to be measured to be measured is all bigger, and the terminal device of actual concrete void detection
Volume it is generally all smaller, therefore the coagulation of detection engineering live sub-fraction position to be measured is only capable of in the embodiment of the present invention every time
Soil comes to nothing situation.In order to facilitate technical staff use and it is subsequent come to nothing the analysis of situation to engineering scene to be measured, the present invention
Position of the point of this detection in this engineering scene to be measured and specific can be recorded in embodiment after the completion of each detection
What state of coming to nothing, and the data of the position detected before recorded and situation of coming to nothing are updated, obtain engineering
On-site concrete to be measured comes to nothing distributed data, so that can obtain after being fully completed to entire engineering on-site test to be measured
The case where obtaining the concrete void distribution at entire engineering scene to be measured data, come to nothing, how is depth of coming to nothing if which place exists.
It should be understood that the size of the serial number of each step is not meant that the order of the execution order in above-described embodiment, each process
Execution sequence should be determined by its function and internal logic, the implementation process without coping with the embodiment of the present application constitutes any limit
It is fixed.
Corresponding to the method for above-described embodiment, Fig. 8 shows the inspection of concrete void depth provided in an embodiment of the present invention
The structural block diagram of device is surveyed, for ease of description, only parts related to embodiments of the present invention are shown.
The detection device of the exemplary concrete void depth of Fig. 8 is configured at terminal device, and the terminal device includes neutron
Source and thermal-neutron detector, the concrete that the neutron source is used to be covered with steel plate to surface emit fast neutron, the thermal neutron
Detector is located on the steel plate, hankers sub-count after the concrete slowing down becomes thermal neutron for detecting fast neutron
Rate；The detection device of the concrete void depth may include: acquiring unit 801, judging unit 802, first detection unit 803
With second detection unit 804.
Acquiring unit 801, first detected in the first preset duration of current location for obtaining thermal-neutron detector
Thermal neutron counting rate；
Judging unit 802, for judging that the concrete whether there is and coming to nothing according to the first thermal neutron counting rate；
First detection unit 803, if for the concrete there is no coming to nothing, detect the next position concrete whether
In the presence of coming to nothing；
Second detection unit 804 comes to nothing if existing for the concrete, comes to nothing to the concrete current location
Depth carries out quantitative detection.
Optionally, above-mentioned acquiring unit is also used to obtain thermal-neutron detector and the position come to nothing is not present in the concrete
Set the second thermal neutron counting rate detected in the first preset duration；The judging unit is also used to described in comparison first and hankers
Whether sub-count rate is greater than or equal to the second thermal neutron counting rate, if the first thermal neutron counting rate is greater than or equal to institute
State the second thermal neutron counting rate, it is determined that there is no come to nothing the concrete；If the first thermal neutron counting rate is less than described
Second thermal neutron counting rate, it is determined that the concrete, which exists, to come to nothing.
Further, above-mentioned judging unit, if being less than second heat also particularly useful for the first thermal neutron counting rate
Neutron count rate then calculates the difference between the first thermal neutron counting rate and the second thermal neutron counting rate；If described
Difference is greater than or equal to the first preset threshold, it is determined that the concrete, which exists, to come to nothing；If it is pre- that the difference is less than described first
If threshold value, it is determined that there is no come to nothing the concrete.
Above-mentioned second detection unit 804 is also used to obtain thermal-neutron detector between the concrete and the steel plate
There is no the third thermal neutron counting rates detected in the second preset duration of position come to nothing, the thickness of the steel plate and described
The 4th thermal neutron counting rate that thermal-neutron detector detects in second preset duration of current location；Wherein, described
Two preset durations are greater than first preset duration；Search thermal neutron counting rate corresponding with the thickness of the steel plate and depth of coming to nothing
The corresponding relationship of degree；The benchmark thermal neutron counting rate in the corresponding relationship is extracted, and calculates the third thermal neutron counting rate
With the ratio between the benchmark thermal neutron counting rate；The 4th thermal neutron counting rate is modified using the ratio,
Obtain the 5th thermal neutron counting rate；The corresponding depth of coming to nothing of the 5th thermal neutron counting rate is determined according to the corresponding relationship.
Above-mentioned second detection unit 804, be also used to search corresponding with the thickness of steel plate thermal neutron counting rate and
Before the corresponding relationship for depth of coming to nothing, the steel plate of different-thickness is measured, obtains and store the heat of the steel plate of every kind of thickness
The corresponding relationship of neutron count rate and depth of coming to nothing.
Above-mentioned second detection unit 804, be also used to obtain different-thickness steel plate be closely covered on it is mixed there is no what is come to nothing
The thermal neutron counting rate that thermal-neutron detector detects when solidifying soil surface, obtains the corresponding benchmark thermal neutron of steel plate of every kind of thickness
Counting rate；Thermal neutron is visited when the steel plate for obtaining different-thickness respectively is closely covered on the concrete surface that there are different depth of coming to nothing
The thermal neutron counting rate that device detects is surveyed, the corresponding thermal neutron counting rate of steel plate for obtaining every kind of thickness is corresponding with depth of coming to nothing
Relationship.
It should be noted that for convenience and simplicity of description, the detection device of the concrete void depth of foregoing description
Specific work process can refer to the corresponding process of above-mentioned Fig. 1 method into Fig. 7, and details are not described herein.
Fig. 9 shows the signal of the terminal device of the detection for concrete void depth of one embodiment of the invention offer
Figure.The terminal device 9 may include: processor 90, memory 91 and be stored in memory 91 and can be on processor 90
The computer program 92 of operation.Processor 90 realizes above-mentioned each detection concrete void depth when executing computer program 92
Step in embodiment of the method, such as step 101 shown in FIG. 1 is to step 104.Alternatively, processor 90 executes computer program
The function of each module/unit in above-mentioned each Installation practice, such as the function of unit 801 to 804 shown in Fig. 8 are realized when 92.
Alleged processor 90 can be central processing unit (Central Processing Unit, CPU), can also be
Other general processors, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor, be also possible to any conventional processor etc..
Memory 91 can be the internal storage unit of the terminal device 9 for the detection of concrete void depth, such as
The hard disk or memory of the terminal device 9 of detection for concrete void depth.Memory 91 is also possible to de- for concrete
The External memory equipment of the terminal device 9 of the detection of empty depth, such as the terminal device 9 of the detection for concrete void depth
The plug-in type hard disk of upper outfit, intelligent memory card (Smart Media Card, SMC), secure digital (Secure Digital,
SD) block, flash card (Flash Card) etc..Further, memory 91 can also both include for concrete void depth
The internal storage unit of the terminal device 9 of detection also includes External memory equipment.Memory 91 is for storing above-mentioned computer journey
Other programs and data needed for sequence and the terminal device of the detection for concrete void depth.
Above-mentioned computer program can be divided into one or more module/units, and said one or multiple modules/mono-
Member is stored in above-mentioned memory 91, and is executed by above-mentioned processor 90, to complete the present invention.Said one or multiple moulds
Block/unit can be the series of computation machine program instruction section that can complete specific function, the instruction segment by describe it is above-mentioned based on
Implementation procedure of the calculation machine program in the terminal of the detection of above-mentioned carry out concrete void depth.For example, above-mentioned computer program
Acquiring unit, judging unit, first detection unit and second detection unit can be divided into, each unit concrete function is as follows:
Acquiring unit hankers sub-count for obtaining thermal-neutron detector detects in the first preset duration of current location first
Rate；Judging unit, for judging that the concrete whether there is and coming to nothing according to the first thermal neutron counting rate；First detection
Unit, if the concrete for detecting the next position, which whether there is, to come to nothing for the concrete there is no coming to nothing；Second detection is single
Member is come to nothing if existing for the concrete, carries out quantitative detection to the depth of coming to nothing of the concrete.
It is apparent to those skilled in the art that for convenience of description and succinctly, only with above-mentioned each function
Can unit, module division progress for example, in practical application, can according to need and by above-mentioned function distribution by different
Functional unit, module are completed, i.e., the internal structure of device are divided into different functional unit or module, to complete above description
All or part of function.Each functional unit in embodiment, module can integrate in one processing unit, be also possible to
Each unit physically exists alone, and can also be integrated in one unit with two or more units, above-mentioned integrated unit
Both it can take the form of hardware realization, can also realize in the form of software functional units.In addition, each functional unit, mould
The specific name of block is also only for convenience of distinguishing each other, the protection scope being not intended to restrict the invention.It is single in above system
Member, the specific work process of module, can refer to corresponding processes in the foregoing method embodiment, details are not described herein.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in detail or remembers in some embodiment
The part of load may refer to the associated description of other embodiments.
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician
Described function can be specifically realized using distinct methods to each, but this realization is it is not considered that beyond this
The range of invention.
In embodiment provided by the present invention, it should be understood that disclosed terminal device and method can pass through it
Its mode is realized.For example, terminal device embodiment described above is only schematical.For example, module or unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components
It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling or direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit
Conjunction or communication connection can be electrical property, mechanical or other forms.
Unit may or may not be physically separated as illustrated by the separation member, shown as a unit
Component may or may not be physical unit, it can and it is in one place, or may be distributed over multiple networks
On unit.It can some or all of the units may be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If integrated module/unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, the present invention realizes above-described embodiment side
All or part of the process in method can also instruct relevant hardware to complete by computer program, computer program
It can be stored in a computer readable storage medium, the computer program is when being executed by processor, it can be achieved that above-mentioned each side
The step of method embodiment.Wherein, computer program includes computer program code, and computer program code can be source code shape
Formula, object identification code form, executable file or certain intermediate forms etc..Computer-readable medium may include: that can carry meter
Any entity or device of calculation machine program code, recording medium, USB flash disk, mobile hard disk, magnetic disk, CD, computer storage, only
Read memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), electricity load
Wave signal, telecommunication signal and software distribution medium etc..It should be noted that the content that computer-readable medium includes can root
Increase and decrease appropriate is carried out according to the requirement made laws in jurisdiction with patent practice, such as in certain jurisdictions, according to vertical
Method and patent practice, computer-readable medium do not include electric carrier signal and telecommunication signal.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of detection method of concrete void depth is applied to terminal device, the terminal device includes neutron source and heat
Neutron detector, the concrete that the neutron source is used to be covered with steel plate to surface emit fast neutron, the thermal-neutron detector
On the steel plate, for detecting thermal neutron counting rate of the fast neutron after the concrete slowing down becomes thermal neutron；It is special
Sign is that the detection method of the concrete void depth includes:
Obtain the first thermal neutron counting rate that thermal-neutron detector detects in the first preset duration of current location；
According to the first thermal neutron counting rate, judges that the concrete whether there is and come to nothing；
It comes to nothing if the concrete that the concrete there is no coming to nothing, detects the next position whether there is；
It comes to nothing if the concrete exists, quantitative detection is carried out to the depth of coming to nothing of the concrete current location.
2. detection method as described in claim 1, which is characterized in that described according to the first thermal neutron counting rate, judgement
The concrete is with the presence or absence of before coming to nothing, comprising:
It obtains thermal-neutron detector and the second heat detected in the first preset duration of position come to nothing is not present in the concrete
Neutron count rate；
Correspondingly, it is described according to the first thermal neutron counting rate, judge that the concrete includes: with the presence or absence of coming to nothing
Compare whether the first thermal neutron counting rate is greater than or equal to the second thermal neutron counting rate, if described first hankers
Sub-count rate is greater than or equal to the second thermal neutron counting rate, it is determined that there is no come to nothing the concrete；If described first
Thermal neutron counting rate is less than the second thermal neutron counting rate, it is determined that the concrete, which exists, to come to nothing.
3. detection method as claimed in claim 2, which is characterized in that if the first thermal neutron counting rate is less than described
Second thermal neutron counting rate, it is determined that the concrete, which exists, to come to nothing, comprising:
If the first thermal neutron counting rate is less than the second thermal neutron counting rate, the first thermal neutron counting rate is calculated
With the difference between the second thermal neutron counting rate；
If the difference is greater than or equal to the first preset threshold, it is determined that the concrete, which exists, to come to nothing；If the difference is less than
First preset threshold, it is determined that there is no come to nothing the concrete.
4. detection method as claimed in any one of claims 1-3, which is characterized in that the depth of coming to nothing to the concrete
Degree carries out quantitative detection, comprising:
Obtaining thermal-neutron detector, there is no in the second preset duration of position come to nothing between the concrete and the steel plate
The thickness and the thermal-neutron detector of the third thermal neutron counting rate, the steel plate that detect are in the current location second
The 4th thermal neutron counting rate detected in preset duration；Wherein, second preset duration is greater than first preset duration；
Search the corresponding relationship of thermal neutron counting rate corresponding with the thickness of the steel plate with depth of coming to nothing；
The benchmark thermal neutron counting rate in the corresponding relationship is extracted, and calculates the third thermal neutron counting rate and the benchmark
Ratio between thermal neutron counting rate；
The 4th thermal neutron counting rate is modified using the ratio, obtains the 5th thermal neutron counting rate；
The corresponding depth of coming to nothing of the 5th thermal neutron counting rate is determined according to the corresponding relationship.
5. detection method as claimed in claim 4, which is characterized in that search heat corresponding with the thickness of the steel plate described
Before neutron count rate and the corresponding relationship for depth of coming to nothing, comprising:
The steel plate of different-thickness is measured, obtains and store the thermal neutron counting rate of the steel plate of every kind of thickness and depth of coming to nothing
Corresponding relationship.
6. detection method as claimed in claim 5, which is characterized in that the steel plate to different-thickness is measured, and is obtained
The corresponding relationship of the thermal neutron counting rate of the steel plate of every kind of thickness and depth of coming to nothing, comprising:
Thermal-neutron detector detects when the steel plate of acquisition different-thickness is closely covered on the concrete surface for being not present and coming to nothing
Thermal neutron counting rate obtains the corresponding benchmark thermal neutron counting rate of steel plate of every kind of thickness；
The thermal neutron detection when steel plate for obtaining different-thickness respectively is closely covered on the concrete surface that there are different depth of coming to nothing
The thermal neutron counting rate that device detects obtains the corresponding thermal neutron counting rate of the steel plate pass corresponding with depth of coming to nothing of every kind of thickness
System.
7. a kind of detection device of concrete void depth, is configured at terminal device, the terminal device includes neutron source and heat
Neutron detector, the concrete that the neutron source is used to be covered with steel plate to surface emit fast neutron, the thermal-neutron detector
On the steel plate, for detecting thermal neutron counting rate of the fast neutron after the concrete slowing down becomes thermal neutron；It is special
Sign is that the detection device of the concrete void depth includes:
Acquiring unit, by obtaining based on the first thermal neutron that thermal-neutron detector detects in the first preset duration of current location
Digit rate；
Judging unit, for judging that the concrete whether there is and coming to nothing according to the first thermal neutron counting rate；
First detection unit, if detecting the concrete of the next position with the presence or absence of de- for the concrete there is no coming to nothing
It is empty；
Second detection unit, if for the concrete exist come to nothing, to the concrete current location come to nothing depth into
Row quantitative detection.
8. detection device as claimed in claim 7, which is characterized in that
The acquiring unit is also used to obtain thermal-neutron detector when the concrete is not present the position first come to nothing and presets
The the second thermal neutron counting rate detected in length；
The judging unit, is also used to whether the first thermal neutron counting rate described in comparison is greater than or equal to the second thermal neutron meter
Digit rate, if the first thermal neutron counting rate is greater than or equal to the second thermal neutron counting rate, it is determined that the concrete is not
In the presence of coming to nothing；If the first thermal neutron counting rate is less than the second thermal neutron counting rate, it is determined that the concrete exists
It comes to nothing.
9. a kind of terminal device, including memory, processor and storage are in the memory and can be on the processor
The computer program of operation, which is characterized in that the processor realizes such as claim 1 to 6 when executing the computer program
The step of any one the method.
10. a kind of computer readable storage medium, the computer-readable recording medium storage has computer program, and feature exists
In when the computer program is executed by processor the step of any one of such as claim 1 to 6 of realization the method.
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