CN108548833A - A kind of concrete void detection method, device and terminal device - Google Patents
A kind of concrete void detection method, device and terminal device Download PDFInfo
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- CN108548833A CN108548833A CN201810259594.6A CN201810259594A CN108548833A CN 108548833 A CN108548833 A CN 108548833A CN 201810259594 A CN201810259594 A CN 201810259594A CN 108548833 A CN108548833 A CN 108548833A
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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
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N23/09—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 transmitting the radiation through the material and measuring the absorption the radiation being neutrons
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Abstract
The present invention is suitable for neutron detection technical field, provides concrete void detection method, device and terminal device, the method includes：Read the thermal neutron counting rate N1 of the first thermal-neutron detector and thermal neutron counting rate N2 of the second thermal-neutron detector, and the count rate ratio of N1 and N2 are calculated, the first thermal-neutron detector is less than the second thermal-neutron detector at a distance from neutron source at a distance from neutron source；The thickness of the steel plate of concrete surface covering is obtained, and finds out the correspondence of count rate ratio and concrete void depth according to the thickness of steel plate；The corresponding concrete void depth of count rate ratio is determined according to correspondence.The embodiment of the present invention saves a large amount of cumbersome operations, greatly improves the practical efficiency to concrete void depth survey.
Description
Technical field
The invention belongs to a kind of neutron detection technical field more particularly to concrete void detection method, device and terminals
Equipment.
Background technology
In the buildings 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 cast matter since some unavoidable technological problems in construction and field working conditions limit
Amount, which is affected, causes concrete to be difficult to fill closely knit, especially easy tos produce and comes to nothing or cavity in steel plate and concrete joint surface
Defect.These come to nothing with cavity blemish be directly contribute back lining of steel plate when project inputs are run deformation instability damage it is huge hidden
Suffer from, it will seriously threaten engineering operation safety.In order to ensure the safety of engineering, it is necessary to a kind of science, efficiently, accurate, safety
Detection method go detection come to nothing and cavity position and depth, with for the punching in later stage grouting scientific basis is provided.
After the atomic nucleus of fast neutron ray and measured medium that neutron source emits collides, can be slowed down shape by slowing down
At thermal neutron and converge around neutron source.When fast neutron is with material effect, the substance big to atomic weight has very strong wear
Saturating ability, but be easy to form thermal neutron by the small deceleration of atomic weight and slowing down, and since hydrogen atom atomic weight is minimum,
Fast neutron with easily become thermal neutron after hydrogen atom multiple impacts.Concrete is to add one by gravel aggregate, coarse sand and cement
Gauge 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 with the shape that dissociates
State exists, therefore includes a large amount of hydrogen atoms in concrete, is a kind of good fast neutron moderator.Since fast neutron is to atomic weight
Big substance has stronger penetration capacity, but can form thermal neutron by the small deceleration of atomic weight and slowing down, therefore, fast neutron
Be easy to through the big substance of atomic weight such as steel plate and with following coagulation soil interaction, and formed by concrete deceleration slowing down
Thermal neutron.Neutron source and thermal-neutron detector are placed in surface of steel plate according to this feature, so that fast neutron is sent out by neutron source and wears
Certain thickness steel plate and coagulation soil interaction under steel plate are crossed, fast neutron can be decelerated at this time, slowing down forms thermal neutron, then profit
Thermal neutron counting rate is detected with thermal-neutron detector, if due to the concrete poured into a mould under steel plate in the plane with a depthkeeping
Non-uniform mass in range is spent, even there is cavity or cavity defect, the thermal neutron counting rate of the site tests will send out
Changing, therefore handled based on the thermal neutron counting rate detected, you can it realizes to test point with the presence or absence of empty or de-
Empty and respective depth detection, here it is the Neutron Scattering Method principle for being used for concrete void detection in the prior art,
The fields such as architectural engineering, water conservancy and hydropower have played important function.Wherein and cavity or cavity defect depth are bigger, the heat detected
Neutron count rate is lower.
Contain since the content of hydrogen atom in the albedo and concrete of neutron is closely related, namely with water in concrete
Measure it is closely related, therefore, according to Neutron Scattering Method testing principle, at test point thermal neutron counting rate size not only with steel under the point
Plate depth of coming to nothing is related, while also being influenced by steel plate thickness and the practical water content size of concrete.Therefore, the prior art is in profit
Cavity is detected with Neutron Scattering Method or is come to nothing and whether there is and when its depth, not by different test point positions concrete moisture content
Uniformly be affected, for example, have under steel plate at one it is deeper come to nothing or cavity, the thermal neutron counting rate of probe detection should be relatively low,
But if the water content of concrete is higher herein, the reduction of thermal neutron counting rate caused by cavity at this time can cause because of high-moisture
The raising of thermal neutron counting rate and offset each other, large error is caused to testing result, reduce this method accuracy and can
Repeatability, when steel plate thickness is larger or when depth of coming to nothing is shallower, can not Accurate Determining come to nothing position and depth, unavoidably
Meeting cause perforations adding to increase, destroy steel plate structure and original intensity, the overall security of building adversely affected.And
The prior art using Neutron Scattering Method detection when being come to nothing or empty depth, due to the steel plate and coagulation of different detection onsite applications
The actual conditions difference of soil, therefore all need before each detection to be directed to the live steel plate thickness of required detection, concrete not
The determination experiment of complicated detection model is carried out with water content and different depth of coming to nothing, and needs all detections according to actual measurement
The thermal neutron counting rate of point determine to exist come to nothing or the position in cavity after, the judgement for the depth that could carry out coming to nothing operates feelings
The very complicated inconvenience of condition, while replacing detection scene every time and model construction and determination experiment, inefficiency need to be re-started.
Invention content
In view of this, an embodiment of the present invention provides concrete void detection method, device and terminal device, it is existing to solve
Have in technology when being come to nothing using Neutron Scattering Method detection and empty depth, the very complicated inconvenience of operation sequence, inefficiency
Problem.
The first aspect of the embodiment of the present invention provides a kind of concrete void detection method, including：
The thermal neutron counting rate N1 and second thermal-neutron detector for reading the first thermal-neutron detector hanker sub-count
Rate N2, and the count rate ratio of N1 and N2 are calculated, first thermal-neutron detector is less than described second at a distance from neutron source
Thermal-neutron detector is at a distance from the neutron source；
The thickness of the steel plate of concrete surface covering is obtained, and the counting rate ratio is found out according to the thickness of the steel plate
The correspondence of value and concrete void depth；
The corresponding concrete void depth of the count rate ratio is determined according to the correspondence.
The second aspect of the embodiment of the present invention provides a kind of concrete void detection device, including：
Ratio calculation module, thermal neutron counting rate N1 and the second thermal neutron for reading the first thermal-neutron detector are visited
The thermal neutron counting rate N2 for surveying device, and calculates the count rate ratio of N1 and N2, first thermal-neutron detector and neutron source
Distance is less than second thermal-neutron detector at a distance from the neutron source；
Relationship searching module, the thickness of the steel plate for obtaining concrete surface covering, and according to the thickness of the steel plate
Find out the correspondence of the count rate ratio and concrete void depth；
Depth determining module, for determining the corresponding concrete of the count rate ratio according to the correspondence
It comes to nothing depth.
The third aspect of the embodiment of the present invention provides a kind of computer readable storage medium, including：It is stored with computer
Program, which is characterized in that the computer program realizes concrete void detection method as described above when being executed by processor
The step of.
Existing advantageous effect is the embodiment of the present invention compared with prior art：The embodiment of the present invention and the prior art are not
It is with place, due to receiving that same neutron source is sent out for two and obtaining heat via identical coagulation soil interaction slowing down
For the thermal-neutron detector of neutron, although the counting rate of received thermal neutron can also be contained by steel plate thickness, concrete
Water and come to nothing or the influence of empty depth, but for same block concrete, water content to the slowing down of neutron and
Scattering power is fixed, i.e., the influence to two thermal-neutron detector thermal neutron counting rates synchronizes consistent, and concrete
In come to nothing or cavity can make thermal neutron more accessible to from the farther thermal-neutron detector of neutron source, to make two thermal neutrons
The thermal neutron counting rate that detector receives generates larger difference, while the difference for depth of coming to nothing can make this difference further
Changing of real estate, and this bigger difference of the depth value that comes to nothing is bigger.Therefore hankered by measure two thermal-neutron detectors
Sub-count rate carries out ratio calculation, can eliminate the influence of concrete moisture content well, so that the embodiment of the present invention is only
It need to consider the influence of steel plate thickness and the depth come to nothing to count rate ratio.Therefore, it only needs in embodiments of the present invention
The acquisition of thermal neutron counting rate is carried out apart from different thermal-neutron detectors and calculate the two using two from neutron source
Count rate ratio, then the size of concrete void depth is inquired based on the correspondence set, you can it realizes to coagulation
Soil comes to nothing and the direct detection of empty depth value, and having broken away from must be built in the prior art for the water content of concrete
Mould, and exceptional value judgement is carried out to obtained data the case where also need water content practical according to the concrete of measure field, with
And the amendment of field data greatly improves practical to the survey of concrete void depth to save a large amount of cumbersome operations
The efficiency of amount.
Description of the drawings
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 be only the present invention some
Embodiment for those of ordinary skill in the art without having to pay creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Figure 1A is the implementation process schematic diagram for the concrete void detection method that the embodiment of the present invention one provides；
Figure 1B is the principle schematic for the concrete void detection method that the embodiment of the present invention one provides；
Fig. 2A is the implementation process schematic diagram of concrete void detection method provided by Embodiment 2 of the present invention；
Fig. 2 B are the implementation process schematic diagrames of concrete void detection method provided by Embodiment 2 of the present invention；
Fig. 3 is the implementation process schematic diagram for the concrete void detection method that the embodiment of the present invention three provides；
Fig. 4 is the implementation process schematic diagram for the concrete void detection method that the embodiment of the present invention four provides；
Fig. 5 is the schematic diagram for the concrete void detection device that the embodiment of the present invention five provides；
Fig. 6 is the schematic diagram for the concrete void detection terminal equipment that the embodiment of the present invention six provides.
Specific implementation mode
In being described below, for illustration and not for limitation, it is proposed that such as tool of particular system structure, technology etc
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 can also be realized 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 solutions according to the invention, illustrated below by specific embodiment.
The existing technology detected to concrete void using neutron is launched to steel plate and concrete using neutron source
After fast neutron, thermal neutron detection is carried out using single thermal-neutron detector, to judge in concrete with the presence or absence of coming to nothing or empty
Hole and corresponding depth profile.It, just must be simultaneously in order to realize the detection come to nothing according to single thermal-neutron detector
Consider that the steel plate thickness of concrete surface covering, the water content of different concrete and difference come to nothing three kinds of factors of depth to hankering
Son conversion and the influence that thermal neutron is received to thermal-neutron detector.Due to the possibility of three kinds of factors in Practical Project scene to be measured
Situation is more, therefore is all to be measured experiment to measuring instrument in the lab in advance in the prior art, i.e., with regard to different steel
Plate thickness, the water content of different concrete and difference depth of coming to nothing carry out sample pattern and build respectively, to simulate different works
Journey field condition to be measured.For example, first preparing the concrete of different moisture content in the lab, then covered in these concrete surfaces
The steel plate of different-thickness, and adjust the distance between steel plate and concrete, recycle on this basis neutron source on the steel plate to
Concrete emits fast neutron, and records the thermal neutron counting rate that single thermal-neutron detector receives, and establishes different steel plates
In the case of the water content of thickness and different concrete, thermal neutron counting rate that single thermal-neutron detector receives with come to nothing
The corresponding relation data table of depth.
In actual conditions, the thickness of common steel plate is relatively limited, such as common 30mm, 40mm and 50mm, therefore
When steel plate is carried out sample preparation or chosen, workload is smaller.But concrete moisture content is by engineering field fabrication to be measured
What actual conditions when concrete determined, possible situation is more more complicated, therefore, carries out concrete sample system in the lab
When making, the sample of some relatively conventional concrete moisture contents can only be made, and all possibility situations cannot be covered.I.e.
Make in this way, since three kinds of factors belong to the independent variable factor in experiment, and each independent variable must be weighed when changing
Corresponding data are newly tested and are recorded, the case where this makes the water content to different steel plate thickness and different concrete
Under, the acquisition workload of the corresponding relation data table of thermal neutron counting rate and depth of coming to nothing that single thermal-neutron detector receives
Become huge, needs to expend a large amount of manpower and materials and go to carry out repeating experimental record, efficiency is very low.
On the other hand, on the basis of above-mentioned prior art determination experiment, engineering staff carries out to engineering scene to be measured
When concrete void detects, need to determine required make according to the steel plate thickness situation at scene and concrete moisture content situation
The corresponding relation data table of thermal neutron counting rate and depth of coming to nothing, however since the water content of concrete in actual conditions can
There are many energy situation, for most of engineering scene to be measured, actual concrete moisture content and the concrete in determination experiment
Sample moisture content still has certain difference.The processing method of the prior art is first by the engineering measured on-site concrete to be measured
Water content is compared with the concrete sample water content in determination experiment, and analysis is poor with immediate concrete sample water content
It is different how, if difference is smaller, directly as reference with the immediate corresponding relation data table of concrete sample water content, come real
Now to the detection of concrete void depth, although doing so the detection that can be realized to concrete void depth, what it was detected
Data certainly exist larger error.And when differing greatly, the corresponding relation data table obtained in determination experiment can not
Directly with reference to using, needs in the prior art at this time after first carrying out unified measurement comprehensively to entire engineering scene to be measured, find out it
In the relatively relatively low abnormal point of thermal neutron counting rate, then come to nothing actual grade to abnormal point hole measurement of drilling, and using obtaining
Depth data data correction is carried out to the corresponding relation data table that is obtained in determination experiment, later could be after normal use corrects
Corresponding relation data table carry out depth survey of coming to nothing.However in actual conditions, the engineering scene to be measured of required measurement is general
Area is all bigger, but for detect the measuring instrument volume of depth of coming to nothing often the smaller live area that can be measured every time compared with
It is small, and thermal neutron counting rate statistics is required for the regular hour when each measurement, such as assumes the face that measuring instrument can measure every time
Product is 30cm × 30cm, and the area measured needed for engineering scene to be measured is 200m2, it measures be required for 1-2 minutes every time, this
Shi Shiji concrete moisture content differences are excessive, need at least 2000 times surveys that could complete scene to be measured to engineering of practical measurement
Amount takes at least 50 hours or more, after the completion of engineering in-site measurement to be measured, it is also necessary to by data manually enter computer program into
Row statistical analysis can just provide the specific distributed data that comes to nothing, it is therefore desirable to which expending a large amount of manpower and materials and time could complete
To the detection that engineering on-site concrete to be measured comes to nothing, the extremely huge inefficiency of workload, and accuracy is not also high.
It is based on drawbacks described above in the prior art, the present invention, which proposes, a kind of to be carried out vacant analysis to concrete and mix
Solidifying soil Method of Void, to promote the efficiency detected to concrete void.
Figure 1A shows the implementation flow chart for the concrete void detection method that the embodiment of the present invention one provides, and is described in detail such as
Under：
S101 reads the thermal neutron counting rate N1 of the first thermal-neutron detector and the thermal neutron of the second thermal-neutron detector
Counting rate N2, and the count rate ratio of N1 and N2 are calculated, the first thermal-neutron detector is hankered at a distance from neutron source less than second
Sub- detector is at a distance from neutron source.
In order to improve the efficiency detected to concrete void, double thermal-neutron detectors are used in the embodiment of the present invention and are synchronized
It carries out thermal neutron detection and seeks the mode of count rate ratio to carry out concrete void detection.Figure 1B is that the embodiment of the present invention one carries
The testing principle schematic diagram of the concrete void detection method of confession, principle are as follows：
Thermal neutron that is that same neutron source is sent out and being obtained via same coagulation soil interaction slowing down is received for two
Thermal-neutron detector for, although the counting rate of received thermal neutron also can be by steel plate thickness, concrete moisture content
And come to nothing or the influence of empty depth, but in Interal fixation, for same block concrete, water content is to neutron
Slowing down and scattering power be it is fixed, i.e., the influence to two thermal-neutron detector thermal neutron counting rates be synchronize it is fixed,
And coming to nothing in concrete or cavity can make thermal neutron more accessible to from the farther thermal-neutron detector of neutron source, to make two
The thermal neutron counting rate that a thermal-neutron detector receives generates larger difference, while the difference for depth of coming to nothing can so that this is poor
It is different further to generate variation, and this bigger difference of the depth value that comes to nothing is bigger.Therefore, when steel plate thickness is fixed, pass through by
Two thermal-neutron detector thermal neutron counting rates carry out ratio calculation, can eliminate the influence of concrete moisture content well.Cause
This, need to only carry out hankering sub-count in embodiments of the present invention from neutron source using two apart from different thermal-neutron detectors
The acquisition of rate and the count rate ratio both calculated, then inquired based on the correspondence under the fixation steel plate thickness set
Go out the size of concrete void depth, you can realize the direct detection to concrete void and empty depth value.Wherein, two heat
The specific distance of neutron detector and neutron source can be set by technical staff according to actual demand.
Based on above-mentioned principle, in order to realize that the detection to concrete void, the embodiment of the present invention can read two heat first
The thermal neutron counting rate data of neutron detector simultaneously calculate its ratio, for subsequently using, wherein count rate ratio either
The form of N1/N2 can also be the form of N2/N1, specifically can voluntarily be set by technical staff.
S102, obtains the thickness of the steel plate of concrete surface covering, and finds out count rate ratio according to the thickness of steel plate
With the correspondence of concrete void depth.
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.
As shown in the above description, it to count rate ratio in the case of different steel plate thickness and can be mixed in advance in the embodiment of the present invention
The come to nothing correspondence of depth of solidifying soil is measured experiment, and carries out record storage to determination experiment result with for subsequent inquiry
It uses, therefore, the embodiment of the present invention, only need to be according to the thickness of steel plate from stored measurement after getting count rate ratio
The correspondence needed for this time detecting is found out in experimental result.The method of wherein specific determination experiment can be by technical staff
It voluntarily selectes, not limits herein, it is preferable that can refer to the embodiment of the present invention two and be measured experiment.
S103 determines the corresponding concrete void depth of count rate ratio according to correspondence.
After finding out the correspondence needed for this time detecting, according to each count rate ratio described in correspondence
Corresponding concrete void depth is searched, you can is known in this time concrete of detection with the presence or absence of coming to nothing and come to nothing pair
The depth (when concrete void depth is 0, that is, illustrating that there is no come to nothing in concrete) answered.
As an embodiment of the present invention, the corresponding concrete void of count rate ratio is being determined using correspondence
When depth, further include：
If non-recording gauge digit rate ratio in correspondence, using interpolation method in correspondence with similar in count rate ratio
Data are handled, to obtain the corresponding concrete void depth of count rate ratio.
In view of in actual conditions in pair to different steel plate thickness count rate ratios and concrete void depth
It should be related to the value that the concrete void depth profile that when being measured experiment, can be simulated all is limited and discrete, it is corresponding
Count rate ratio also necessarily limited and discrete value, therefore, in actual application, it is most likely that will appear the meter of actual measurement
Digit rate ratio is not present among correspondence, for example, it is assumed that count rate ratio and concrete void that determination experiment obtains are deep
The correspondence of degree is table 1, and the count rate ratio surveyed is 0.71, can not be found out using obtained correspondence at this time
Corresponding concrete void depth.
Table 1
| Concrete void depth d (mm) | Count rate ratio N2/N1 |
| 0 | 0.5 |
| 2 | 0.6 |
| 5 | 0.7 |
| 7 | 0.74 |
| 10 | 0.78 |
Therefore, in order to ensure in the case where measured count rates ratio is not present in correspondence, detection concrete is remained to
It comes to nothing depth, the embodiment of the present invention can be handled the data in correspondence using interpolation method, required mixed to obtain
Solidifying soil comes to nothing depth.Still by taking above-mentioned table 1 as an example, when measured count rates ratio is 0.71, concrete is obtained finally using interpolation method
It comes to nothing depth：D=5+ (7-5) × (0.71-0.70)/(0.74-0.70)=5.5 (mm).
As another embodiment of the present invention, in order to avoid the count rate ratio of above-mentioned actual measurement be not present in correspondence it
In situation occur, improve the accuracy that detect to concrete void, understand obtaining in the embodiment of the present invention based on determination experiment
Count rate ratio carries out curve fitting with concrete void depth data in the case of different steel plate thickness, thick to obtain different steel plates
The curvilinear function relationship of count rate ratio and concrete void depth in the case of degree.At this point, the embodiment of the present invention only need to be according to mixed
The thickness of the steel plate of solidifying soil surface covering chooses corresponding curvilinear function, then count rate ratio is substituting in curvilinear function and is carried out
It calculates, you can obtain required concrete void depth.
In the embodiment of the present invention only thermal neutron need to be carried out apart from different thermal-neutron detectors using two from neutron source
The acquisition of counting rate and the count rate ratio both calculated, then concrete void is inquired based on the correspondence set
Depth size, you can realize that having broken away from must be directed in the prior art to the direct detection of concrete void and empty depth value
Concrete moisture content come the case where modeled, and also need water content practical according to measure field concrete come to obtained data
Exceptional value judgement and the amendment of field data are carried out, to save a large amount of cumbersome operations, it is practical right to greatly improve
The efficiency of concrete void depth survey.
As another embodiment of the present invention, in order to further increase to engineering on-site concrete vacant analysis to be measured
Accuracy, the detection method of the embodiment of the present invention one can be utilized in the embodiment of the present invention simultaneously, and is based in the prior art single
The detection method of thermal-neutron detector is respectively detected engineering scene to be measured, obtains two groups of concrete void testing results,
And the Comprehensive Assessment for situation of being come to nothing based on obtained two groups of results progress engineering on-site concrete to be measured.Wherein single thermal neutron detection
Thermal-neutron detector used in the detection method of device, either the thermal neutron detection used in the embodiment of the present invention one
Device can also be independently arranged, and the method for Comprehensive Assessment is including but not limited to such as averaged, and can specifically be carried out by technical staff
Setting.
As the embodiment of the present invention two, as shown in Figure 2 A, a pair of concrete of the embodiment of the present invention carry out vacant analysis it
Before, it is also necessary to the measuring instrument for detection is measured, including：
S100 is measured measuring instrument, to obtain count rate ratio and concrete void in the case of different steel plate thickness
The correspondence of depth：
As shown in Figure 2 B, S100 is measured measuring instrument, with obtain in the case of different steel plate thickness count rate ratio with
The correspondence of concrete void depth, including：
The steel plate sample of thickness H=H1 is covered in concrete surface, adjusts steel plate sample and concrete surface by S1001
Distance d value, acquire and record the thermal neutron counting rate and the second thermal neutron detection of corresponding first thermal-neutron detector of d values
The count rate ratio of the thermal neutron counting rate of device is obtained when steel plate sample thickness is H1, count rate ratio and concrete void
The correspondence of depth d, light plate sample are concrete void depth d with concrete surface distance d.
In embodiments of the present invention, using steel plate sample simulation engineering it is to be measured scene in steel plate, using steel plate sample with
The distance d simulation concretes of concrete surface come to nothing and the depth in cavity, to realize the simulation at scene to be measured to engineering.Due to this
The influence of concrete moisture content is eliminated in inventive embodiments to the measurement of concrete void, therefore when being measured experiment,
The requirement for choosing not water content to concrete, i.e., to the preparation of concrete or acquisition without considering its water content situation.
Wherein, H1 refers to being measured steel plate thickness used in experiment for the first time, and occurrence can be by technical staff voluntarily
It chooses.When being adjusted the different concrete void depth profiles of simulation with concrete surface distance d to steel plate sample, it is
Improve the validity of obtained correspondence, it is preferable that can be by the concrete void surveyed in practical engineering application depth
Angle value is as the bases d value range, then multiselect takes different d values to be measured reality as much as possible in basic value range
It tests.
S1002 is adjusted H, and after each adjustment, repeats the value of adjustment d, acquires and records d values correspondence
The first thermal-neutron detector thermal neutron counting rate and the second thermal-neutron detector thermal neutron counting rate count rate ratio
Operation, in the case of obtaining different H, the correspondence of count rate ratio and concrete void depth d.
After completing First Determination experiment, replaces the steel plate sample of different-thickness and repeats the experimental procedure of above-mentioned adjustment d,
It can be obtained the correspondence of count rate ratio and concrete void depth d under different steel plate thickness.Wherein, in order to as full as possible
The demand at sufficient Practical Project scene to be measured, it is preferable that the value of H should cover that Practical Project scene to be measured is all as much as possible can
The depth information for the practical steel plate that can be used.
It, can not also be as in the embodiment of the present invention two when being measured experiment as an alternative embodiment of the invention
Different-thickness steel plate sample is tested one by one, but builds the environment of multiple above-mentioned simulations simultaneously, and synchronous progress is multiple
The determination experiment of the steel plate sample of different-thickness, to promote the efficiency of determination experiment.The determination experiment method of actual use can be by
Technical staff is determined according to actual conditions, not limits herein.
As a preferred embodiment of the present invention, one layer can be arranged around neutron source by materials such as paraffin or polyethylene
Expect the shielded layer made.In view of neutron scattering may cause human body certain injury, while excessive scattering can make
The thermal neutron counting rate that thermal-neutron detector obtains is affected to some extent, so that the embodiment of the present invention is finally obtained mixed
Solidifying soil result of coming to nothing can be reduced the accuracy of detection by a degree of influence, therefore can be in neutron in the embodiment of the present invention
One layer of shielded layer is set around source, to realize while protecting user security, the accuracy that raising detects concrete void.
Wherein should explanatorily, the first thermal-neutron detector and neutron source when being measured experiment in the embodiment of the present invention two
Distance and the second thermal-neutron detector at a distance from neutron source, should be with the first thermal neutron in the embodiment of the present invention one
Detector is at a distance from neutron source and the second thermal-neutron detector is identical at a distance from neutron source, de- to concrete to ensure
The accuracy of sky detection, is described as follows：
Since thermal-neutron detector can also be made the thermal neutron quantity that thermal-neutron detector receives at a distance from neutron source
At influence, i.e., the thermal neutron counting rate of thermal-neutron detector can be had an impact, but the design and engineering of practical measuring instrument wait for
Survey in Site Detection, no matter thermal-neutron detector and neutron source be separation module formula design or unitary design in measuring instrument
In, in the concrete void detection acquisition neutron count rate for carrying out engineering scene to be measured using measuring instrument, in order to ensure to acquire
The accurate and effective of the neutron count rate arrived, it is necessary to placement is fixed in thermal-neutron detector and neutron source, therefore each
When concrete void detects, thermal-neutron detector is fixed at a distance from neutron source.Therefore, de- to concrete in order to ensure
The accuracy of sky detection, it is preferable that the embodiment of the present invention to the correspondence of count rate ratio and concrete void depth into
When row setting, need to consider two thermal-neutron detectors at a distance from neutron source.But in actual conditions, as long as real
Two when being tested with two range determinations when border engineering Site Detection to be measured are apart from identical, you can this error is eliminated together
, so in the embodiment of the present invention determination experiment with it is actually detected when two distances should be identical.
As the present invention alternatively possible realization method, it is contemplated that in actual conditions the thermal-neutron detector of measuring instrument with
The distance of neutron source may have unfixed situation, if measuring instrument may be the design of separate type, i.e. thermal-neutron detector
It can freely be placed by technical staff at a distance from neutron source, should also be as abiding by above-mentioned first thermal neutron when being measured experiment at this time
Detector is at a distance from neutron source and the second thermal-neutron detector is at a distance from neutron source, should be with the embodiment of the present invention one
In the first thermal-neutron detector at a distance from neutron source and the second thermal-neutron detector identical original at a distance from neutron source
Then, to ensure the accuracy of detection.Specifically, can be divided apart from situation different when being measured experiment by technical staff
When not being measured experiment, and being tested by engineering field technician to be measured, it is real to choose measurement corresponding with actual range situation
The data source that result is tested as correspondence is detected.
As the embodiment of the present invention three as shown in figure 3, reading the heat of the first thermal-neutron detector in the embodiment of the present invention one
Before the thermal neutron counting rate N2 of neutron count rate N1 and the second thermal-neutron detector, further include：
S301, obtains the thickness of steel plate, and judges whether the thickness of steel plate is more than preset thickness.
S302 is visited from neutron source apart from fixed multiple first kind thermal neutrons if the thickness of steel plate is more than preset thickness
It surveys in device and selects the first thermal-neutron detector and the second thermal-neutron detector.
S303, if the thickness of steel plate is less than or equal to preset thickness, from neutron source apart from fixed multiple second classes heat
The first thermal-neutron detector and the second thermal-neutron detector, the heat of first kind thermal-neutron detector are selected in neutron detector
Neutron acquires area and is more than the second class thermal-neutron detector.
Since actual conditions light plate thickness is bigger, by coagulation soil interaction and the shadow surface of thermal neutron that reflects
Product is also bigger, so that collected can hanker that subnumber is also fewer, i.e., thermal-neutron detector is collected on unit area
The reliability of thermal neutron counting rate data is also lower.In view of above-mentioned actual conditions, in order to which that improves hankers sub-count
It is different to preset two class thermal neutrons acquisition area to promote the reliability finally detected for the reliability of rate in the embodiment of the present invention
Thermal-neutron detector be used as alternatively, wherein the big first kind thermal-neutron detector of thermal neutron acquisition area is mainly used for steel plate
The acquisition of thermal neutron when thickness is larger, small the second class thermal-neutron detector of thermal neutron acquisition area be mainly used for steel plate thickness compared with
The acquisition of hour thermal neutron.Therefore, in embodiments of the present invention, the actual (real) thickness of engineering live light plate to be measured can be judged first
Whether it is more than preset thickness, if more than then illustrating that the irradiated area of thermal neutron is larger, selects first kind thermal-neutron detector at this time
It is used as the selection object of two thermal-neutron detectors needed for this time detecting.Conversely, then selecting the second class thermal-neutron detector
It is used as the selection object of two thermal-neutron detectors needed for this time detecting.Wherein, the occurrence of preset thickness can be by technology
Personnel choose according to actual conditions, it is preferable that 40mm can be selected as required preset thickness.
As the embodiment of the present invention four, as shown in figure 4, in the embodiment of the present invention one or three, the first thermal neutron detection is obtained
Before the thermal neutron counting rate N1 of the device and thermal neutron counting rate N2 of the second thermal-neutron detector, further include：
S401 filters out the first required thermal-neutron detector and the second heat from preset multiple thermal-neutron detectors
Neutron detector：
Due in Practical Project scene to be measured concrete come to nothing or the situation in cavity may complex, possibility of such as coming to nothing
Will not be very smooth, while neutron source may also be not located at the surface in cavity when placing measuring instrument, and these situations are all
The collected thermal neutron counting rate of thermal-neutron detector may be caused to generate variation, to the counting rate ratio of two thermal-neutron detectors
Value generates certain influence.Therefore, in order to improve the validity of the count rate ratio used, what promotion detected concrete void
Accuracy can preset multiple thermal-neutron detectors in the embodiment of the present invention, and therefrom select two optimal groups when in use
Conjunction is used as original thermal neutron count rate ratio data source.Such as in the embodiment of the present invention three, for per a kind of thermal neutron detection
Device all default at least two, and therefrom screened after the thermal-neutron detector type used needed for determining or this hair
In bright embodiment one, directly presets multiple thermal-neutron detectors and screened.
It should be noted that carrying out the principle of vacant analysis to concrete it is found that when two thermal neutrons according to embodiments of the present invention
Its count rate ratio is not used to the vacant analysis of concrete when detector is identical at a distance from neutron source, and therefore, the present invention is real
The multiple thermal-neutron detectors applied in example should be different at a distance from neutron source, to ensure the validity of count rate ratio.
Required the first thermal-neutron detector and the second thermal neutron are filtered out from preset multiple thermal-neutron detectors
Detector, including：
S4011 reads thermal neutron counting rate corresponding with multiple thermal-neutron detectors.
S4012 carries out combination of two to multiple thermal-neutron detectors, and calculates separately the count rate ratio of each combination.
Where it is assumed that thermal-neutron detector number is I, then the combination I thermal-neutron detector combination of two obtained
Number is C (I, 2)=I！/[(I-2)！×2！].
The count rate ratio of each combination is distinguished corresponding standard proportional threshold value and carries out mathematic interpolation by S4013, and
Using the thermal-neutron detector in the maximum combination of absolute difference as the first thermal-neutron detector and the second thermal neutron detection
Device.
Wherein, standard proportional threshold value refers to two heat when the concrete void depth d of simulation is 0 in determination experiment
The corresponding count rate ratio of neutron detector.The thermal neutron count rate ratio that two thermal-neutron detectors receive as d=0
It is only related to the thickness of steel plate, it therefore, in the embodiment of the present invention needs to be that each combination is measured experiment respectively in advance, with true
It is corresponding under different steel plate thickness to make the combination, the correspondence of count rate ratio and concrete void depth, for mark
The inquiry of quasi- proportion threshold value.Such as I=4, there are 6 kinds of possible combination of two, it is therefore desirable to distinguish for 6 kinds of combined situations
It is measured experiment, to obtain 6 groups of different correspondences.But it should explanatorily, due to needed for the embodiment of the present invention
It is the value of current count rate ratio and the difference ideally of d=0, therefore is chosen carrying out correspondence to determine often
When the group corresponding standard proportional threshold value of thermal-neutron detector, there is no particular requirement to specific steel plate thickness, only need to all choose phase
Correspondence under stack pile.When difference maximum absolute value, since steel plate thickness fixes the shadow to thermal-neutron detector
It rings and fixes, illustrate that the influence for the concrete void that this group of thermal-neutron detector is subject to is maximum, at this time by absolute difference maximum one
Group is as required the first thermal-neutron detector and the second thermal-neutron detector, you can realizes in Practical Project scene to be measured
Concrete come to nothing or cavity situation it is complex when, also can preferably ensure the accuracy detected to concrete void, carry
The efficiency of high detection.
As an embodiment of the present invention, it is default it is multiple from neutron source apart from the basis of different thermal-neutron detectors
On, it can also directly choose required first thermal-neutron detector and the second thermal-neutron detector manually by technical staff.Consider
To may also can exist in actual conditions thermal-neutron detector exception, the situation of obtained thermal neutron counting rate exception, if at this time
It according to count rate ratio come automatic screening, may result in obtain the data of mistake, therefore be user in embodiments of the present invention
The function of choosing manually is provided, to provide further guarantee to be detected to concrete void.
As an embodiment of the present invention, the concrete void of the point of detection is determined every time in the embodiment of the present invention one
After depth, further include：
Record the position of the concrete void detected every time, and the position generation of the concrete void obtained based on record
Concrete void distributed data.
Since common engineering scene area to be measured to be measured is all bigger, and the measuring instrument of actual concrete void detection
Volume is generally all smaller, therefore is only capable of the coagulation of detection engineering live sub-fraction position to be measured in the embodiment of the present invention one every time
Soil comes to nothing situation.The analysis for situation of in order to facilitate the use of technical staff and subsequently coming to nothing 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 after being fully completed to entire engineering Site Detection to be measured, you can obtain
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.
The embodiment of the present invention and the prior art the difference is that, due to receiving what same neutron sources were sent out for two
And for via identical coagulation soil interaction slowing down obtaining the thermal-neutron detector of thermal neutron, the meter of received thermal neutron
Although digit rate by steel plate thickness, concrete moisture content and can also come to nothing or empty depth is influenced, mixed for same
For solidifying soil, water content is fixed to the slowing down and scattering power of neutron, i.e., to two thermal-neutron detector thermal neutrons
The influence of counting rate is to synchronize fixed, and coming to nothing in concrete or cavity can make thermal neutron more accessible to more from neutron source
Remote thermal-neutron detector, to which the thermal neutron counting rate for making two thermal-neutron detectors receive generates larger difference, simultaneously
The difference for depth of coming to nothing can make this difference further generate variation, and this bigger difference of the depth value that comes to nothing is bigger.Cause
This can eliminate concrete moisture content well by the way that two thermal-neutron detector thermal neutron counting rates are carried out ratio calculation
It influences, so that the embodiment of the present invention need to only consider the influence of steel plate thickness and the depth come to nothing to count rate ratio i.e.
It can.Therefore, need to only be hankered in embodiments of the present invention apart from different thermal-neutron detectors from neutron source using two
The acquisition of sub-count rate and the count rate ratio both calculated, then the correspondence tested based on measured in advance and insert
Value method obtains the size of concrete void depth, you can realizes the direct detection to concrete void and empty depth value, pendulum
Having taken off must be modeled in the prior art for the water content of concrete, and also be needed practical according to the concrete of measure field
The case where water content, carries out exceptional value judgement and the amendment of field data to obtained data, a large amount of numerous to save
Trivial operation greatly improves the practical efficiency to concrete void depth survey.Simultaneously, it is contemplated that steel plate thickness is to hankering
The influence of sub- detector carries out selection acquisition provided with the different size thermal-neutron detector of thermal neutron acquisition area, ensures
The validity of collected thermal neutron counting rate data, and in view of Practical Project on-site concrete to be measured comes to nothing the possibility of situation
Influence, be provided with it is multiple from neutron source apart from different thermal-neutron detectors, and according to the counting of the combination of two actually obtained
Rate ratio is screened, to promote the accuracy to depth detection of coming to nothing.
Corresponding to the method described in foregoing embodiments, Fig. 5 shows concrete void detection provided in an embodiment of the present invention
The structure diagram of device illustrates only and the relevant part of the embodiment of the present invention for convenience of description.The exemplary concrete of Fig. 5
Vacant analysis device can be the executive agent for the concrete void detection method that previous embodiment one provides.
With reference to Fig. 5, which includes：
Ratio calculation module 51, thermal neutron counting rate N1 and the second thermal neutron for reading the first thermal-neutron detector
The thermal neutron counting rate N2 of detector, and the count rate ratio of N1 and N2 are calculated, first thermal-neutron detector and neutron source
Distance be less than second thermal-neutron detector at a distance from the neutron source.
Relationship searching module 52, the thickness of the steel plate for obtaining concrete surface covering, and according to the thickness of the steel plate
Degree finds out the correspondence of the count rate ratio and concrete void depth.
Depth determining module 53, for determining the corresponding coagulation of the count rate ratio according to the correspondence
Soil comes to nothing depth.
Further, the concrete void detection device further includes：Module is measured, for being measured to measuring instrument, with
Obtain the correspondence of the count rate ratio and the concrete void depth in the case of different steel plate thickness.
The measurement module, including：
Unitary determination module adjusts the steel plate sample for the steel plate sample of thickness H=H1 to be covered in concrete surface
The value of this and the concrete surface distance d, acquires and records the thermal neutron of corresponding first thermal-neutron detector of d values
The count rate ratio of counting rate and the thermal neutron counting rate of second thermal-neutron detector obtains in steel plate sample thickness being H1
When, the correspondence of the count rate ratio and the concrete void depth d, wherein the steel plate sample and concrete surface
Distance d be concrete void depth d.
Adjustment measures module, for being adjusted to H, and after each adjustment, repeats the value of adjustment d, acquisition is simultaneously
Record the thermal neutron of the thermal neutron counting rate and second thermal-neutron detector of corresponding first thermal-neutron detector of d values
The operation of the count rate ratio of counting rate, in the case of obtaining different H, the count rate ratio is deep with the concrete void
Spend the correspondence of d.
Further, the concrete void detection device further includes：
Thickness judgment module, the thickness for obtaining the steel plate, and it is default to judge whether the thickness of the steel plate is more than
Thickness.
First detector chosen module, if for the steel plate thickness be more than the preset thickness, from the neutron
Source selects first thermal-neutron detector and second heat in fixed multiple first kind thermal-neutron detectors
Neutron detector.
Second detector chosen module, if for the steel plate thickness be less than or equal to the preset thickness, from institute
It states neutron source and selects first thermal-neutron detector and described in fixed multiple second class thermal-neutron detectors
The thermal neutron acquisition area of second thermal-neutron detector, the first kind thermal-neutron detector is visited more than the second class thermal neutron
Survey device.
Further, the concrete void detection device further includes：
Screening module, for filtering out required first thermal neutron detection from preset multiple thermal-neutron detectors
Device and second thermal-neutron detector：
The screening module, including：
Counting rate read module, for reading thermal neutron counting rate corresponding with the multiple thermal-neutron detector.
Combinations of detectors module for carrying out combination of two to the multiple thermal-neutron detector, and calculates separately each
The count rate ratio of combination.
Detector screening module, for by the count rate ratio of each combination distinguish corresponding standard proportional threshold value into
Row mathematic interpolation, and using the thermal-neutron detector in the maximum combination of absolute difference as first thermal-neutron detector with
And second thermal-neutron detector.
Further, depth determining module 53, including：
Interpolation evaluation module, if for not recording the count rate ratio in the correspondence, using interpolation method to institute
It states in correspondence and is handled with data similar in the count rate ratio, to show that the count rate ratio is corresponding described
Concrete void depth.
Further, the concrete void detection device further includes：
It comes to nothing distribution record module, the position for recording the concrete void detected every time, and obtained based on record
The concrete void position generate concrete void distributed data.
Each module realizes the process of respective function in concrete void detection device provided in an embodiment of the present invention, specifically may be used
With reference to the description of the aforementioned embodiment of the present invention one to four and other related embodiments, details are not described herein again.
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 invention constitutes any limit
It is fixed.
Fig. 6 is the schematic diagram for the concrete void detection terminal equipment that one embodiment of the invention provides.As shown in fig. 6, should
The concrete void detection terminal equipment 6 of embodiment includes：It processor 60, memory 61 and is stored in the memory 61
And the computer program 62 that can be run on the processor 60.The processor 60 is realized when executing the computer program 62
Step in above-mentioned each concrete void detection method embodiment, such as step 101 shown in FIG. 1 is to 104.Alternatively, described
Processor 60 realizes the function of each module/unit in above-mentioned each device embodiment, such as Fig. 6 when executing the computer program 62
The function of shown module 51 to 53.
Alleged processor 60 can be central processing unit (Central Processing Unit, CPU), can also be
Other general processors, digital signal processor (Digital Signal Processor, DSP), application-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, can also be any conventional processor etc..
The memory 61 can be the internal storage unit of the concrete void detection terminal equipment 6, such as coagulation
The hard disk or memory of native vacant analysis terminal device 6.The memory 61 can also be that the concrete void detection terminal is set
Standby 6 External memory equipment, such as the plug-in type hard disk that is equipped in the concrete void detection terminal equipment 6, intelligent storage
Block (Smart Media Card, SMC), secure digital (Secure Digital, SD) card, flash card (Flash Card) etc..
Further, the memory 61 can also both include the concrete void detection terminal equipment 6 internal storage unit or
Including External memory equipment.The memory 61 is for storing the computer program and the concrete void detection terminal
Other programs needed for equipment and data.The memory 61, which can be also used for temporarily storing, have been exported or will export
Data.
It is apparent to those skilled in the art that for convenience of description and succinctly, only with above-mentioned each work(
Can unit, module division progress for example, in practical application, can be as needed and by above-mentioned function distribution by different
Functional unit, module are completed, i.e., the internal structure of described device are divided into different functional units or module, more than completion
The all or part of function of description.Each functional unit, module in embodiment can be integrated in a processing unit, also may be used
It, can also be above-mentioned integrated during two or more units are integrated in one unit to be that each unit physically exists alone
The form that hardware had both may be used in unit is realized, can also be realized in the form of SFU software functional unit.In addition, each function list
Member, the specific name of module are also only to facilitate mutually distinguish, the protection domain being not intended to limit this application.Above system
The specific work process of middle unit, module, can refer to corresponding processes in the foregoing method embodiment, and 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 realize that lists 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, depends on the specific application and design constraint of technical solution.Professional technician
Specifically described function can be realized using distinct methods, but this realization is it is not considered that beyond this to each
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, the module or list
Member division, only a kind of division of logic function, formula that in actual implementation, there may be another division manner, such as multiple units or
Component can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point is shown
The mutual coupling or direct-coupling or communication connection shown or discussed can be by between some interfaces, device or unit
Coupling or communication connection are connect, can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, you can be located at a place, or may be distributed over multiple
In network element.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also
It is that each unit physically exists alone, it can also be during two or more units be integrated in one unit.Above-mentioned integrated list
The form that hardware had both may be used in member is realized, can also be realized in the form of SFU software functional unit.
If the integrated module/unit be realized in the form of SFU software functional unit and as independent product sale or
In use, can be stored in a computer read/write memory medium.Based on this understanding, the present invention realizes above-mentioned implementation
All or part of flow in example method, can also instruct relevant hardware to complete, the meter by computer program
Calculation machine program can be stored in a computer readable storage medium, the computer program when being executed by processor, it can be achieved that on
The step of stating each embodiment of the method.Wherein, the computer program includes computer program code, the computer program generation
Code can be source code form, object identification code form, executable file or certain intermediate forms etc..The computer-readable medium
May include：Any entity or device, recording medium, USB flash disk, mobile hard disk, magnetic of the computer program code can be carried
Dish, CD, computer storage, read-only memory (Read-Only Memory, ROM), random access memory (Random
Access Memory, RAM), electric carrier signal, telecommunication signal and software distribution medium etc..It should be noted that the meter
The content that calculation machine readable medium includes can carry out increase and decrease appropriate according to legislation in jurisdiction and the requirement of patent practice,
Such as in certain jurisdictions, according to legislation and patent practice, computer-readable medium does not include electric carrier signal and telecommunications
Signal.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although with reference to aforementioned reality
Applying example, invention is explained in detail, it will be understood by those of ordinary skill in the art that：It still can be to aforementioned each
Technical solution recorded in embodiment is modified or equivalent replacement of some of the technical features；And these are changed
Or replace, the spirit and scope for various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution should all
It is included within protection scope of the present invention.
Claims (10)
1. a kind of concrete void detection method, which is characterized in that including：
The thermal neutron counting rate N1 of the first thermal-neutron detector and thermal neutron counting rate N2 of the second thermal-neutron detector is read,
And the count rate ratio of N1 and N2 are calculated, first thermal-neutron detector is less than second thermal neutron at a distance from neutron source
Detector is at a distance from the neutron source；
Obtain concrete surface covering steel plate thickness, and according to the thickness of the steel plate find out the count rate ratio with
The correspondence of concrete void depth；
The corresponding concrete void depth of the count rate ratio is determined according to the correspondence.
2. concrete void detection method as described in claim 1, which is characterized in that in the first thermal neutron detection of the reading
Before the thermal neutron counting rate N1 of the device and thermal neutron counting rate N2 of the second thermal-neutron detector, further include：To measuring instrument into
Row measures, to obtain the correspondence of the count rate ratio and the concrete void depth in the case of different steel plate thickness：
It is described that measuring instrument is measured, it is taken off with the concrete with obtaining the count rate ratio in the case of different steel plate thickness
The correspondence of empty depth, including：
The steel plate sample of thickness H=H1 is covered in concrete surface, adjusts the steel plate sample and the concrete surface
The value of distance d, acquires and the thermal neutron counting rate for recording corresponding first thermal-neutron detector of d values is hankered with described second
The count rate ratio of the thermal neutron counting rate of sub- detector, obtain steel plate sample thickness be H1 when, the count rate ratio with
The correspondence of the concrete void depth d, wherein the steel plate sample is that concrete is de- with concrete surface distance d
Empty depth d；
H is adjusted, and after each adjustment, repeats the value of adjustment d, acquire and record d values corresponding described first
The thermal neutron counting rate of thermal-neutron detector and the count rate ratio of the thermal neutron counting rate of second thermal-neutron detector
Operation, in the case of obtaining different H, the correspondence of the count rate ratio and the concrete void depth d.
3. concrete void detection method as described in claim 1, which is characterized in that in the first thermal neutron detection of the reading
Before the thermal neutron counting rate N1 of the device and thermal neutron counting rate N2 of the second thermal-neutron detector, further include：
The thickness of the steel plate is obtained, and judges whether the thickness of the steel plate is more than preset thickness；
If the thickness of the steel plate be more than the preset thickness, from the neutron source apart from fixed multiple first kind thermal neutrons
First thermal-neutron detector and second thermal-neutron detector are selected in detector；
If the thickness of the steel plate be less than or equal to the preset thickness, from the neutron source apart from fixed multiple second classes
First thermal-neutron detector and second thermal-neutron detector, the first kind heat are selected in thermal-neutron detector
The thermal neutron acquisition area of neutron detector is more than the second class thermal-neutron detector.
4. the concrete void detection method as described in claim 1 or 3, which is characterized in that in the first thermal neutron of the reading
Before the thermal neutron counting rate N1 of the detector and thermal neutron counting rate N2 of the second thermal-neutron detector, further include：From default
Multiple thermal-neutron detectors in filter out required first thermal-neutron detector and second thermal-neutron detector：
It is described that required first thermal-neutron detector and described are filtered out from preset multiple thermal-neutron detectors
Two thermal-neutron detectors, including：
Read thermal neutron counting rate corresponding with the multiple thermal-neutron detector；
Combination of two is carried out to the multiple thermal-neutron detector, and calculates separately the count rate ratio of each combination；
The count rate ratio of each combination is distinguished into corresponding standard proportional threshold value and carries out mathematic interpolation, and difference is absolute
It is worth the thermal-neutron detector in maximum combination as first thermal-neutron detector and second thermal-neutron detector.
5. concrete void detection method as described in claim 1, which is characterized in that described to be determined according to the correspondence
Go out the corresponding concrete void depth of the count rate ratio, including：
If the count rate ratio is not recorded in the correspondence, using interpolation method in the correspondence with the counting
Data are handled similar in rate ratio, to obtain the corresponding concrete void depth of the count rate ratio.
6. concrete void detection method as described in claim 1, which is characterized in that described true according to the correspondence
After making the corresponding concrete void depth of the count rate ratio, further include：
Record the position of the concrete void detected every time, and the position generation of the concrete void obtained based on record
Concrete void distributed data.
7. a kind of concrete void detection device, which is characterized in that including：
Ratio calculation module, thermal neutron counting rate N1 and the second thermal-neutron detector for reading the first thermal-neutron detector
Thermal neutron counting rate N2, and calculate the count rate ratio of N1 and N2, first thermal-neutron detector is at a distance from neutron source
Less than second thermal-neutron detector at a distance from the neutron source；
Relationship searching module, the thickness of the steel plate for obtaining concrete surface covering, and searched according to the thickness of the steel plate
Go out the correspondence of the count rate ratio and concrete void depth；
Depth determining module, for determining the corresponding concrete void of the count rate ratio according to the correspondence
Depth.
8. concrete void detection device as claimed in claim 7, which is characterized in that further include measuring module, for surveying
Amount instrument is measured, corresponding with the concrete void depth to obtain the count rate ratio in the case of different steel plate thickness
Relationship；
The measurement module, including：
Unitary determination module, for the steel plate sample of thickness H=H1 to be covered in concrete surface, adjust the steel plate sample with
The value of the distance d of the concrete surface, acquires and record corresponding first thermal-neutron detector of d values hankers sub-count
The count rate ratio of rate and the thermal neutron counting rate of second thermal-neutron detector is obtained when steel plate sample thickness is H1,
The correspondence of the count rate ratio and the concrete void depth d, wherein the steel plate sample and concrete surface
Distance d is concrete void depth d；
Adjustment measures module, for being adjusted to H, and after each adjustment, repeats the value of adjustment d, acquires and record d
Be worth the thermal neutron counting rate of corresponding first thermal-neutron detector and second thermal-neutron detector hankers sub-count
The operation of the count rate ratio of rate, in the case of obtaining different H, the count rate ratio and the concrete void depth d
Correspondence.
9. a kind of concrete void detection terminal equipment, including memory, processor and it is stored in the memory and can
The computer program run on the processor, which is characterized in that the processor is realized when executing the computer program
Such as the step of any one of claim 1 to 6 the method.
10. a kind of computer readable storage medium, the computer-readable recording medium storage has computer program, feature to exist
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.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810259594.6A CN108548833B (en) | 2018-03-27 | 2018-03-27 | Concrete void detection method and device and terminal equipment |
| PCT/CN2018/081735 WO2019183996A1 (en) | 2018-03-27 | 2018-04-03 | Concrete void detection method and apparatus, terminal device, and medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810259594.6A CN108548833B (en) | 2018-03-27 | 2018-03-27 | Concrete void detection method and device and terminal equipment |
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| Publication Number | Publication Date |
|---|---|
| CN108548833A true CN108548833A (en) | 2018-09-18 |
| CN108548833B CN108548833B (en) | 2020-07-07 |
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| CN201810259594.6A Active CN108548833B (en) | 2018-03-27 | 2018-03-27 | Concrete void detection method and device and terminal equipment |
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| CN109307679A (en) * | 2018-11-13 | 2019-02-05 | 深圳市中核共创科技有限公司 | A kind of detection method, detection device and the terminal device of concrete void depth |
| CN109444176A (en) * | 2018-11-29 | 2019-03-08 | 水利部交通运输部国家能源局南京水利科学研究院 | Concrete void depth detection method under a kind of steel shell |
| WO2019183996A1 (en) * | 2018-03-27 | 2019-10-03 | 深圳市中核共创科技有限公司 | Concrete void detection method and apparatus, terminal device, and medium |
| WO2019183995A1 (en) * | 2018-03-27 | 2019-10-03 | 深圳市中核共创科技有限公司 | Concrete void detection system |
| CN115369934A (en) * | 2022-09-27 | 2022-11-22 | 安徽智立通科技股份有限公司 | Visual control system based on static pressure pile construction quality |
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| WO2019183996A1 (en) * | 2018-03-27 | 2019-10-03 | 深圳市中核共创科技有限公司 | Concrete void detection method and apparatus, terminal device, and medium |
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| WO2019183996A1 (en) | 2019-10-03 |
| CN108548833B (en) | 2020-07-07 |
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