CN108801183A - A kind of concrete void detecting system - Google Patents
A kind of concrete void detecting system Download PDFInfo
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- CN108801183A CN108801183A CN201810257825.XA CN201810257825A CN108801183A CN 108801183 A CN108801183 A CN 108801183A CN 201810257825 A CN201810257825 A CN 201810257825A CN 108801183 A CN108801183 A CN 108801183A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B15/00—Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B15/00—Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons
- G01B15/02—Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons for measuring thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N23/005—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 neutrons
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
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Abstract
The present invention is suitable for neutron detection technical field, provides concrete void detecting system, including：Measuring instrument and host, measuring instrument include neutron source；Neutron source is positioned on the steel plate of concrete surface covering, for emitting fast neutron to concrete；Measuring instrument is for measuring steel plate, and the thermal neutron counting rate of neutron source position at different two, and the count rate ratio of the thermal neutron counting rate of position at be calculated two is sent to host；Host is used to obtain the thickness of steel plate, and the correspondence of the count rate ratio and concrete void depth that receive is searched according to thickness；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 neutron detection technical field more particularly to a kind of concrete void detecting systems.
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 reduction of thermal neutron counting rate caused by the higher cavity at this time of the water content of concrete can cause because of high-moisture herein
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 off-line analysis of point determine to exist come to nothing or the position in cavity after, the depth that could carry out coming to nothing is sentenced
It is disconnected, the very complicated inconvenience of operational circumstances, while replacement detection scene need to re-start model construction and determination experiment again every time, imitate
Rate is low.
Invention content
In view of this, an embodiment of the present invention provides concrete void detecting system, to solve utilizing in the prior art
The problem of Neutron Scattering Method detection comes to nothing and when empty depth, the very complicated inconvenience of operation sequence, inefficiency.
The first aspect of the embodiment of the present invention provides a kind of concrete void detecting system, including：
Measuring instrument and host, the measuring instrument include neutron source；
The neutron source is positioned on the steel plate of concrete surface covering, for emitting fast neutron to the concrete；
The measuring instrument is for measuring the steel plate, from the thermal neutron meter of neutron source position at different two
Digit rate, and the count rate ratio of the thermal neutron counting rate of position at be calculated described two is sent to the host；
The host is used to obtain the thickness of the steel plate, and the counting rate ratio received is searched according to the thickness
The correspondence of value and concrete void depth；Determine that the count rate ratio is corresponding described mixed according to the correspondence
Solidifying soil comes to nothing depth.
The second aspect of the embodiment of the present invention provides a kind of concrete void detecting system, including：
Measuring instrument and host, the measuring instrument include neutron source；
The neutron source is positioned on the steel plate of concrete surface covering, for emitting fast neutron to the concrete；
The measuring instrument is for measuring the steel plate, from the thermal neutron meter of neutron source position at different two
Digit rate, and the thermal neutron counting rate of position at be calculated described two is sent to the host；
The host is used to calculate the count rate ratio of the thermal neutron counting rate of position at described two received, obtains institute
The thickness of steel plate is stated, and searches the correspondence of the count rate ratio and concrete void depth according to the thickness；According to
The correspondence determines the corresponding concrete void depth of the count rate ratio.
Existing advantageous effect is the embodiment of the present invention compared with prior art：It is fast due to being sent out for same neutron source
Neutron via at the two of identical coagulation soil interaction slowing down for different positions, the counting of received thermal neutron
Although rate by steel plate thickness, concrete moisture content and can also come to nothing or empty depth is influenced, for same coagulation
For soil, water content is fixed to the slowing down and scattering power of neutron, i.e., to measuring instrument, station acquisition arrives at two
The influence of thermal neutron counting rate is consistent, and coming to nothing in concrete or cavity can make thermal neutron more accessible to from neutron source
It comes to nothing simultaneously so that the thermal neutron counting rate that measuring instrument is received two positions generates larger difference farther position
The difference of depth can make this difference further generate variation, and this bigger difference of the depth value that comes to nothing is bigger.Therefore logical
It crosses and the thermal neutron counting rate measured apart from different positions from neutron source at two is subjected to ratio calculation, can eliminate well mixed
The influence of solidifying soil water content, so that the embodiment of the present invention need to only consider steel plate thickness and the depth come to nothing to counting rate ratio
The influence of value.Therefore, only heat need to be carried out apart from different positions from neutron source using two in embodiments of the present invention
The acquisition of neutron count rate and the count rate ratio for calculating the two, then it is de- to inquire concrete based on preset correspondence
The size of empty depth, you can realize to the direct detection of concrete void and empty depth value, broken away from necessary in the prior art
The case where being modeled for the water content of concrete, and also needing water content practical according to the concrete of measure field is come to obtaining
The data arrived carry out exceptional value judgement and the amendment of Site Detection data and Off-line data analysis, a large amount of numerous to save
Trivial operation greatly improves the practical efficiency to concrete void depth survey.
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.
Fig. 1 is the system interaction figure for the concrete void detecting system that the embodiment of the present invention one provides；
Fig. 2 is the structural schematic diagram of measuring instrument provided by Embodiment 2 of the present invention；
Fig. 3 is the implementation process schematic diagram measured to measuring instrument that the embodiment of the present invention three provides；
Fig. 4 A are the structural schematic diagrams for the measuring instrument that the embodiment of the present invention four provides；
Fig. 4 B are the implementation process schematic diagrames that the thermal-neutron detector that the embodiment of the present invention four provides is chosen；
Fig. 5 is the structural schematic diagram for the measuring instrument that the embodiment of the present invention five provides；
Fig. 6 is the implementation process schematic diagram of six thermal-neutron detector of embodiment of the present invention screening；
Fig. 7 is the system interaction figure for the concrete void detecting system that the embodiment of the present invention seven provides；
Fig. 8 is the system structure diagram for the concrete void detecting system that the embodiment of the present invention eight 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 steel plate at a distance from concrete surface, 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, 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 has different.The processing method of the prior art is first to contain the engineering measured on-site concrete to be measured
Water is compared with the concrete sample water content in determination experiment, analysis and immediate concrete sample water content difference
How, if difference is smaller, directly as reference with the immediate corresponding relation data table of concrete sample water content, to realize
Detection to concrete void depth, although doing so the detection that can be realized to concrete void depth, its number detected
According to larger error is certainly existed, cause accidentally to beat irrigation hole.And when differing greatly, the correspondence number that is obtained in determination experiment
It can not directly refer to and use according to table, need first to carry out unified survey comprehensively to entire engineering scene to be measured at this time in the prior art
After amount, the relatively relatively low abnormal point of thermal neutron counting rate therein is found out, then come to nothing actual grade to abnormal point hole measurement of drilling,
And data correction is carried out to the corresponding relation data table obtained in determination experiment using obtained depth data, it later could be normal
Depth survey of coming to nothing is carried out using revised corresponding relation data table.However in actual conditions, the engineering of required measurement waits for
Survey that the general area in scene is all bigger, but for detect the measuring instrument volume of depth of coming to nothing often it is smaller can measure every time show
Scene product is smaller, and thermal neutron counting rate statistics is required for the regular hour when each measurement, such as assumes that measuring instrument every time can
The area of measurement is 30cm × 30cm, and the area measured needed for engineering scene to be measured is 200m2, measure be required for 1-2 points every time
Clock time, practical concrete moisture content difference is excessive at this time, needs practical measurement that could complete at least 2000 times to be measured to engineering
The measurement at scene takes at least 50 hours or more, after the completion of engineering in-site measurement to be measured, it is also necessary to manually enter data and calculate
Machine program is for statistical analysis just to provide the specific distributed data that comes to nothing, it is therefore desirable to expend a large amount of manpower and materials and time
The detection come to nothing to engineering on-site concrete to be measured, the extremely huge inefficiency of workload could be completed, 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 vacant analysis system, to promote the efficiency detected to concrete void.
Fig. 1 shows the system interaction figure for the concrete void detecting system that the embodiment of the present invention one provides, and details are as follows：
Concrete void detecting system includes：Measuring instrument and host, measuring instrument include neutron source.
In order to improve the efficiency detected to concrete void, used in the embodiment of the present invention at two with neutron source distance
Different positions, which synchronizes, to carry out thermal neutron detection and seeks the mode of count rate ratio to carry out concrete void detection, and principle is such as
Under：
The fast neutron sent out for same neutron source via at the two of identical coagulation soil interaction slowing down apart from different
For position, although the counting rate of received thermal neutron also can by steel plate thickness, concrete moisture content and come to nothing or
The influence of empty depth, but for same block concrete, water content is consistent to the slowing down and scattering power of neutron
, i.e., to measuring instrument at two station acquisition to thermal neutron counting rate influence be it is fixed, and coming to nothing in concrete or
Cavity can make thermal neutron more accessible to from the farther position of neutron source, so that the heat that measuring instrument is received two positions
Neutron count rate generates larger difference, while the difference for depth of coming to nothing can make this difference further generate variation, and de-
Empty depth value is bigger, and this difference is bigger.Therefore by the way that sub-count will be hankered apart from what different positions measured from neutron source at two
Rate carries out ratio calculation, the influence of concrete moisture content can be eliminated well, so that the embodiment of the present invention only needs to consider
The influence of steel plate thickness and the depth come to nothing to count rate ratio.Therefore, two need to be only utilized in embodiments of the present invention
It is a to carry out the acquisition of thermal neutron counting rate apart from different positions from neutron source and calculate the count rate ratio of the two, then base
The size of concrete void depth is inquired in the correspondence set, you can realize to concrete void and empty depth
The direct detection of value.
Neutron source is positioned on the steel plate of concrete surface covering, for emitting fast neutron to concrete.
Based on above-mentioned principle, in order to realize that the detection to concrete void, the embodiment of the present invention begin with neutron source
Emit fast neutron to the concrete for being covered with steel plate.Wherein, it is real as the present invention that the common neutron source of some in nuclear technology can be selected
The neutron source in example is applied, including but not limited to such as241Am-Be neutron sources,239Pu-Be neutron sources and252Cf neutron sources etc..
As a preferred embodiment of the present invention, neutron source includes shield external layer.In view of neutron scattering may be right
Human body causes certain injury, while excessive scattering can make the thermal neutron counting rate that thermal-neutron detector obtains by certain
Influence so that the concrete void result that measuring instrument of the embodiment of the present invention finally measures can be by a degree of shadow
It rings, the accuracy of detection is reduced, therefore can one layer of shielded layer be set in neutron source outer layer in the embodiment of the present invention, to realize guarantor
While protecting worker safety, the accuracy detected to concrete void is improved.The material of wherein shield external layer includes but not
It is limited to such as paraffin or polyethylene.
S101, measuring instrument is for measuring steel plate, and the thermal neutron counting rate of neutron source position at different two, and
The count rate ratio of the thermal neutron counting rate of position at be calculated two is sent to host.
After control neutron source emits fast neutron to the concrete for being covered with steel plate, measuring instrument can be read in the embodiment of the present invention
It takes the thermal neutron counting rate data of position at two and calculates its ratio so that follow-up host uses, wherein two positions and neutron
The specific distance in source can be set by technical staff according to actual demand.Wherein, in order to realize the thermal neutron to position at two
The measurement of counting rate data, the measuring instrument in the embodiment of the present invention need to include that at least two can carry out the thermal neutron of thermal neutron detection
Detector.
After obtaining the count rate ratio of thermal neutron counting rate of position at two, count rate ratio is sent to master by measuring instrument
Machine carries out the judgement of concrete void depth for host.Wherein, not to the data of measuring instrument and host in the embodiment of the present invention
Transmission mode is defined, and can carry out selection setting according to Practical Project field condition to be measured and demand by technical staff.
As a kind of specific implementation of measuring instrument and host data transmission, in embodiments of the present invention measuring instrument and master
The mode of wired connection may be used to carry out data transmission in machine, such as using the data line of plug type by measuring instrument and host
It is attached and carries out data transmission.
As measuring instrument and host data transmission another specific implementation, in embodiments of the present invention measuring instrument with
The mode of wireless connection may be used to carry out data transmission in host, such as is realized using bluetooth or radio frequency wireless communication technique
Measuring instrument is attached and is carried out data transmission with host.
As another specific implementation of measuring instrument and host data transmission, wired connection and wireless can also be used
Connect and the mode deposited is used as measuring instrument and the connection type of host is attached, and carry out data transmission, at this time can by with
Family is according to the demand at Practical Project scene to be measured come the selected mode finally used.
S102, host is used to obtain the thickness of steel plate, and the count rate ratio and concrete received is searched according to thickness
The correspondence for depth of coming to nothing.
Wherein, host is mainly used for detecting concrete void the processing transmission of related data, can be common electricity
Brain terminal or dedicated Engineering Control terminal etc..The thickness data of steel plate can be by technical staff in the steel plate to engineering scene to be measured
After carrying out thickness measure or consulting construction drawing, it is manually entered into host.As shown in the above description, meeting in the embodiment of the present invention
Experiment is measured to the correspondence of count rate ratio in the case of different steel plate thickness and concrete void depth in advance, and right
Determination experiment result carries out record storage to be used for subsequent inquiry, and therefore, the embodiment of the present invention is getting counting rate ratio
After value, the correspondence needed for this time detecting need to be only found out from stored determination experiment result according to the thickness of steel plate
?.The method of wherein specific determination experiment can voluntarily be selected by technical staff, not be limited herein, it is preferable that can refer to this
Inventive embodiments three are 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 counting rate need to be carried out apart from different positions using two from neutron source
The count rate ratio of the two is acquired and calculates, then big to inquire concrete void depth based on the correspondence set
It is small, you can to realize that concrete must be directed in the prior art by having broken away to the direct detection of concrete void and empty depth value
Water content is different to be carried out to obtained data the case where modeled, and also need water content practical according to measure field concrete
Constant value judges and the amendment of field data, to save a large amount of cumbersome operations, greatly improves practical to concrete
It comes to nothing the efficiency of 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 can be visited on the basis of the embodiment of the present invention one in conjunction with single thermal neutron is based in the prior art in the embodiment of the present invention
The detection method for surveying the thermal neutron counting rate of device acquisition single location is respectively detected engineering scene to be measured, obtains two groups and mixes
Solidifying soil vacant analysis is as a result, and carrying out the come to nothing synthesis of situation of engineering on-site concrete to be measured based on two groups of obtained results and commenting
It is fixed, i.e., in the embodiment of the present invention one, further include：
Measuring instrument measures the thermal neutron counting rate on the steel plate of concrete surface covering at single location and is sent to host.
Wherein, single location is either one at collected two in the embodiment of the present invention one in position, at this time only
It needs that the thermal neutron counting rate obtained in the embodiment of the present invention one is directly sent to host, single location can also be independence
Position at the third of position, host is sent to after needing independent measurement at this time at two in the embodiment of the present invention one.
Host finds out the thermal neutron counting rate received pass corresponding with concrete void depth according to the thickness of steel plate
System, and the corresponding concrete void depth of thermal neutron counting rate is determined according to correspondence.
Based on the corresponding concrete void depth of thermal neutron counting rate to the corresponding concrete void depth of count rate ratio
It is modified processing, required concrete void depth is calculated.
Wherein, the method for correcting process is not limited herein, is including but not limited to such as averaged, it specifically can be by skill
Art personnel set.
As the embodiment of the present invention two, as shown in Fig. 2, measuring instrument further includes：Processing unit, the first thermal-neutron detector with
And second thermal-neutron detector.
Wherein, processing unit is communicated to connect with the first thermal-neutron detector and the second thermal-neutron detector respectively, so that
The first thermal-neutron detector and the second thermal-neutron detector thermal neutron counting rate data can be got by obtaining processing unit.
First thermal-neutron detector and the second thermal-neutron detector are placed on the steel plate of concrete surface covering, the first heat
Neutron detector and the second thermal-neutron detector are respectively used to obtain and the thermal neutron of neutron source position at different two
Counting rate N1 and thermal neutron counting rate N2.
Wherein, the first heat that some common thermal-neutron detectors in nuclear technology are used as in the embodiment of the present invention can be selected
Neutron detector 12 and the second thermal-neutron detector 13, including but not limited to as THGEM thermal-neutron detectors, lithium glass flicker
Detector,3He direct ratios gaseous counter and BF3Direct ratio gaseous counter etc..
Processing unit is for reading thermal neutron counting rate N1 and thermal neutron counting rate N2, and by the N1 being calculated and N2
Count rate ratio be sent to host.
Wherein, count rate ratio, specifically can be by technology people either the form of N1/N2 can also be the form of N2/N1
Member is voluntarily set.
Processing unit is mainly used for carrying out the operations such as processing transmission to thermal neutron counting rate in measuring instrument, so that measuring instrument
The acquisition and transmission to count rate ratio can be normally completed.In embodiments of the present invention, processing unit is by processor and phase
The surrounding hardware circuit answered is built-up, wherein processor 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 crystal
Pipe logical device, discrete hardware components etc..General processor can be embedded microprocessor, can also be any conventional place
Device etc. is managed, can specifically be chosen according to actual demand by technical staff.
As the embodiment of the present invention three, as shown in figure 3, on the steel plate that measuring instrument measures concrete surface covering, in
Before thermal neutron counting rate of the component apart from position at different two, further include：Measuring instrument is measured, to obtain different steel
The correspondence of count rate ratio and concrete void depth in the case of plate thickness：
Measuring instrument is measured, to obtain count rate ratio and concrete void depth in the case of different steel plate thickness
Correspondence, including：
S301, processing unit are calculated when being covered in the steel plate sample thickness H=H1 of concrete surface, steel plate sample with it is mixed
The thermal neutron counting rate of corresponding first thermal-neutron detector of distance d values on solidifying soil surface and hankering for the second thermal-neutron detector
The count rate ratio of sub-count rate, and count rate ratio is sent to host.
S302, host count pick up rate ratio, and thickness H and count rate ratio are associated storage, it obtains in steel plate
When sample thickness is H1, the correspondence of count rate ratio and concrete void depth d, light plate sample and concrete surface
Distance d be concrete void depth d.
In embodiments of the present invention, need technical staff using the steel plate in steel plate sample simulation engineering scene to be measured, it will
Steel plate sample is covered in concrete surface, is come to nothing with concrete surface distance d simulation concretes using steel plate sample and empty
Depth, to realize the simulation at scene to be measured to engineering, then measuring instrument is placed on steel plate sample surface on this basis, and sharp
Data correlation storage is carried out with host, to be measured to measuring instrument.Due in the embodiment of the present invention to the survey of concrete void
Amount eliminates the influence of concrete moisture content, therefore when being measured experiment, and to the selection of concrete, water content is not wanted
It asks, 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.
S303, processing unit is when H is adjusted, calculating steel plate sample corresponding first heat with concrete surface distance d values
The count rate ratio of the thermal neutron counting rate of neutron detector and the thermal neutron counting rate of the second thermal-neutron detector is simultaneously sent to
Host.Host count pick up rate ratio, and thickness H and count rate ratio are associated to the operation of storage, to obtain different H's
In the case of, 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 needs to use multiple hairs simultaneously at this time to promote the efficiency of determination experiment
Measuring instrument in bright embodiment one.The determination experiment method of actual use can be determined by technical staff according to actual conditions,
It not limits herein.
Wherein should explanatorily, in embodiments of the present invention thermal-neutron detector at a distance from neutron source either fixed
, the position of thermal-neutron detector and neutron source is cured such as in measuring instrument and is arranged, while thermal-neutron detector and neutron source
Distance can also freely be arranged, such as by thermal-neutron detector using signal wire or wirelessly with measuring instrument main body into
Row connection, need to be specifically configured, but which kind of either above-mentioned mode is arranged, and is carried out in the embodiment of the present invention two by technical staff
The first thermal-neutron detector is at a distance from neutron source when determination experiment and the second thermal-neutron detector is at a distance from neutron source,
At a distance from the first thermal-neutron detector and neutron source when should all be used with the measuring instrument of the embodiment of the present invention two and second
Thermal-neutron detector is identical at a distance from neutron source, and to ensure the accuracy detected to concrete void, detailed description are 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
It surveys in Site Detection, no matter thermal-neutron detector is fixed at a distance from neutron source or can freely be arranged, and is carrying out work
When the concrete void detection acquisition neutron count rate at journey scene to be measured, in order to ensure that the accurate of collected neutron count rate has
Effect, it is necessary to placement is fixed in thermal-neutron detector and neutron source, therefore when each concrete void detects, thermal neutron
Detector is fixed at a distance from neutron source.Therefore, in order to ensure the accuracy detected to concrete void, it is preferable that
The embodiment of the present invention needs synthesis to examine when the correspondence to count rate ratio and concrete void depth is set
Two thermal-neutron detectors are considered at a distance from neutron source.But in actual conditions, if when Practical Project Site Detection to be measured with
Two when determination experiment are apart from identical, you can this error are eliminated together, so determination experiment in the embodiment of the present invention
Two distances when use actually detected with measuring instrument should be identical.
Wherein, be at a distance from neutron source when thermal-neutron detector can freely be arranged when, need to carried out by technical staff
Experiment is measured respectively apart from situation to different, and measurement is being used by engineering field technician to be measured when determination experiment
When instrument is tested, chooses determination experiment result corresponding with actual range situation and be detected as the data source of correspondence.
As the embodiment of the present invention four, as shown in Figure 4 A, measuring instrument includes and the fixed multiple first kind in neutron source position
Thermal-neutron detector, and with the fixed multiple second class thermal-neutron detectors in neutron source position, first kind thermal-neutron detector
Thermal neutron probe area be more than the second class thermal-neutron detector, first kind thermal-neutron detector and the second class thermal neutron detection
Device is placed in the steel plate of concrete surface covering.
Wherein, processing unit is communicated to connect with each thermal-neutron detector respectively, so that processing unit can be got respectively
The neutron count rate data of a thermal-neutron detector heat.
As shown in Figure 4 B, obtain concrete surface covering steel plate on, from neutron source at different two position
Before thermal neutron counting rate N1 and thermal neutron counting rate N2, further include：
S401, host obtain the thickness of steel plate, and judge whether the thickness of steel plate is more than preset thickness.
S402, if the thickness of steel plate is more than preset thickness, host selects the from multiple first kind thermal-neutron detectors
One thermal-neutron detector and the second thermal-neutron detector.
S403, if the thickness of steel plate is less than or equal to preset thickness, host is selected from multiple second class thermal-neutron detectors
Take out the first thermal-neutron detector and the second 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
The reliability of rate includes that acquisition area is different to promote the reliability finally detected, in the measuring instrument in the embodiment of the present invention
Two class thermal-neutron detectors, and be used as alternatively comprising multiple thermal-neutron detectors per a kind of, wherein thermal neutron acquisition area is big
First kind thermal-neutron detector be mainly used for steel plate thickness it is larger when thermal neutron acquisition, thermal neutron acquire area it is small second
Class thermal-neutron detector be mainly used for steel plate thickness it is smaller when thermal neutron acquisition.Therefore, in embodiments of the present invention, first can
Judge whether the actual (real) thickness of engineering live light plate to be measured is more than preset thickness, if more than the irradiated area of thermal neutron is then illustrated
It is larger, select first kind thermal-neutron detector to be used as the selection pair of two thermal-neutron detectors needed for this time detecting at this time
As.Conversely, the second class thermal-neutron detector is then selected to be used as the selection pair for this time detecting two required thermal-neutron detectors
As.Wherein, the occurrence of preset thickness can be chosen by technical staff according to actual conditions, it is preferable that 40mm can be selected and make
For required preset thickness.
As a kind of possible realization method of the present invention, measuring instrument includes multiple thermal neutron detections in the embodiment of the present invention
Device, and required the first thermal-neutron detector and the second thermal-neutron detector are therefrom selected, to improve the counting rate used
The validity of ratio, promotes the accuracy detected to concrete void, concrete principle and realization method, and details refer to following realities
Apply example：
As the embodiment of the present invention five, as shown in figure 5, measuring instrument further includes：Processing unit and multiple thermal neutron detections
Device.
Wherein, processing unit is communicated to connect with each thermal-neutron detector respectively, so that processing unit can be got respectively
The neutron count rate data of a thermal-neutron detector heat.
Multiple thermal-neutron detectors are placed on the steel plate of concrete surface covering, the steel for obtaining concrete surface covering
On plate, the thermal neutron counting rate from neutron source apart from different plurality of positions.
Processing unit from multiple thermal-neutron detectors for filtering out required the first thermal-neutron detector and second
Thermal-neutron detector.
Processing unit is used to read the thermal neutron counting rate N1 and the second thermal-neutron detector of the first thermal-neutron detector
Thermal neutron counting rate N2, and the count rate ratio of the N1 being calculated and N2 is sent to host.
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 four, 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.Wherein, originally
The selection of thermal-neutron detector and processing unit in inventive embodiments is identical with the embodiment of the present invention two, not superfluous herein
It states.Wherein, the embodiment of the present invention is not defined thermal-neutron detector screening technique, can specifically be set by technical staff
It is fixed.
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.
As the embodiment of the present invention six, as shown in fig. 6, measuring instrument further includes：Processing unit and multiple thermal neutron detections
Device.
Multiple thermal-neutron detectors are placed on the steel plate of concrete surface covering, the steel for obtaining concrete surface covering
On plate, the thermal neutron counting rate from neutron source apart from different plurality of positions.
S601, processing unit read thermal neutron counting rate corresponding with multiple thermal-neutron detectors and are sent to master
Machine.
S602, host carry out combination of two to multiple thermal-neutron detectors, and according to the multiple thermal neutron detections received
The corresponding thermal neutron counting rate of device, 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 difference meter by S603, host
It calculates, and using the thermal-neutron detector in the maximum combination of absolute difference as the first thermal-neutron detector and the second thermal neutron
Detector.
S604, processing unit read the thermal neutron counting rate N1 and the second thermal-neutron detector of the first thermal-neutron detector
Thermal neutron counting rate N2, and the count rate ratio of the N1 being calculated and N2 is sent to host.
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.
It is visited as the first required thermal-neutron detector and the second thermal neutron is filtered out from multiple thermal-neutron detectors
Survey device another specific implementation, can also on the basis of the embodiment of the present invention six, by S601 and S602 to heat
The acquisition of neutron count rate and the calculating combined to count rate ratio, are disposed as being responsible for processing by computing unit, at this time
The screening scheme arrived is as follows：
Processing unit reads thermal neutron counting rate corresponding with multiple thermal-neutron detectors, to multiple thermal neutron detections
Device carries out combination of two and calculates separately the count rate ratio of each combination, then the count rate ratio for each of obtaining combining is sent out
It send to host.
Host, which each of will receive the count rate ratio combined, to be distinguished corresponding standard proportional threshold value and carries out difference
It calculates, and the thermal-neutron detector in the maximum combination of absolute difference is hankered as the first thermal-neutron detector and second
Sub- detector.
Its principle related description is identical as the embodiment of the present invention six, and it will not go into details herein.
It is visited as the first required thermal-neutron detector and the second thermal neutron is filtered out from multiple thermal-neutron detectors
Another specific implementation of device is surveyed, the execution processing of all steps in the embodiment of the present invention six can also be disposed as locating
Unit is managed, i.e., the screening to the first thermal-neutron detector and the second thermal-neutron detector is only completed by processing unit, at this time
Obtained screening scheme is as follows：
Processing unit reads thermal neutron counting rate corresponding with multiple thermal-neutron detectors, to multiple thermal neutron detections
Device carries out combination of two and calculates separately the count rate ratio of each combination.
The count rate ratio of each combination is distinguished corresponding standard proportional threshold value and carries out mathematic interpolation by processing unit,
And it is visited the thermal-neutron detector in the maximum combination of absolute difference as the first thermal-neutron detector and the second thermal neutron
Survey device.
Its principle related description is identical as the embodiment of the present invention six, and it will not go into details herein.
It is visited as the first required thermal-neutron detector and the second thermal neutron is filtered out from multiple thermal-neutron detectors
Another specific implementation for surveying device, can also directly be chosen manually by technical staff required first thermal-neutron detector and
Second thermal-neutron detector, measuring instrument further include：Processing unit and multiple thermal-neutron detectors.
Multiple thermal-neutron detectors are placed in the steel plate of concrete surface covering, the steel plate for obtaining concrete surface covering
On, the thermal neutron counting rate from neutron source apart from different plurality of positions.
Host is additionally operable to receive detector selection instruction input by user, and chooses instruction according to detector and hanker from multiple
Required the first thermal-neutron detector and the second thermal-neutron detector are filtered out in sub- detector.
Processing unit is used to read the thermal neutron counting rate N1 and the second thermal-neutron detector of the first thermal-neutron detector
Thermal neutron counting rate N2, and the count rate ratio of the N1 being calculated and N2 is sent to host.
In view of that may also can have thermal-neutron detector exception in actual conditions, obtained thermal neutron counting rate exception
If situation may result in obtain the data of mistake, therefore in the present invention implement at this time according to count rate ratio come automatic screening
The function of choosing manually is provided to the user in example, 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：
The position for the concrete void that host record detects every time, and the position of the concrete void obtained based on record
Generate concrete void areally-distributed data.
Since common engineering live area to be measured is all bigger, and the volume of the measuring instrument of actual concrete void detection
It is general all smaller, therefore the concrete for being only capable of detection engineering live sub-fraction position to be measured in the embodiment of the present invention one every time is de-
Air situation condition.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 are implemented
Host can record position of the point of this detection in this engineering scene to be measured and specific after the completion of each detection in example
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 areally-distributed data, so that after being fully completed to entire engineering Site Detection to be measured, i.e.,
The case where can get the concrete void area distribution at entire engineering scene to be measured data come to nothing as which place exists, come to nothing
How is depth.
Fig. 7 shows the system interaction for the concrete void detecting system that the embodiment of the present invention seven provides, and details are as follows：
Concrete void detecting system, including：Measuring instrument and host, measuring instrument include neutron source.
Neutron source is positioned on the steel plate of concrete surface covering, for emitting fast neutron to concrete.
S701, measuring instrument is for measuring steel plate, and the thermal neutron counting rate of neutron source position at different two, and
The thermal neutron counting rate of position at be calculated two is sent to host.
S702, host are used to calculate the count rate ratio of the thermal neutron counting rate of position at two received, obtain steel plate
Thickness, and according to thickness search count rate ratio and concrete void depth correspondence.
S703 determines the corresponding concrete void depth of count rate ratio according to correspondence.
It will be to data in the embodiment of the present invention in order to reduce the design cost of measuring instrument as far as possible for cost consideration
The function setting of processing is among host, so that need to only be can be completed using some low side embedded chips pair in measuring instrument
Work is transmitted in the processing of data.Therefore, with the embodiments of the present invention one the difference is that, the embodiment of the present invention to count
Host has been given in the calculating of rate ratio, and measuring instrument is merely responsible for measurement and transmission to position thermal neutron counting rate at two at this time.
Wherein, since the systems technology principle of the embodiment of the present invention seven is identical as the embodiment of the present invention one, herein
It will not go into details.Similarly, the related refinement of the concrete void detecting system embodiment of the present invention seven provided and extended mode, also
The embodiments of the present invention one be can refer to the embodiment of the present invention six and other related embodiments, it will not go into details herein.
As the embodiment of the present invention eight, as shown in figure 8, in order to further meet the needs of practical application, in above-mentioned implementation
On the basis of the concrete void detecting system that example provides, further include：
Concrete void detecting system, including：Host and multiple measuring instruments.
Each measuring instrument is positioned on the measurement steel plate at engineering live different zones to be measured, and for measuring corresponding region
On steel plate, the counting of position thermal neutron counting rate at the thermal neutron counting rate or two from neutron source apart from position at different two
Rate ratio, and the thermal neutron counting rate of position at be calculated two or count rate ratio are sent to host.
Host for receiving what each measuring instrument sended over, two on the steel plate of corresponding region at position thermal neutron counting rate
Or count rate ratio, and the concrete void depth of each measuring instrument corresponding region is determined respectively.
Wherein, it is specifically determined pair according to the thermal neutron counting rate of position at two on the steel plate of region or count rate ratio
The scheme of the concrete void depth in region is answered, the related description of the embodiment of the present invention one to seven can be referred to, it is not superfluous herein
It states.The embodiment of the present invention focuses on：Data processing of the host to multiple and different region measuring instruments may be implemented, with reality
Now to the detection of the concrete void depth in multiple and different regions, details are as follows：
Due to there is a situation where that engineering scene to be measured is larger in actual conditions or having multiple and different engineerings scene to be measured,
If only carrying out depth detection of coming to nothing, the efficiency inevitable very low required time expended using only a measuring instrument at this time
Will be long, therefore, in order to further meet practical application request, on the basis of the above embodiments, meeting in the embodiment of the present invention
Multiple measuring instruments are arranged in different zones in engineering scene to be measured, and control these measuring instruments come carry out thermal neutron counting rate or
The acquisition of count rate ratio, then the judgement of the detection to the final concrete void depth in each region is completed by host.Wherein survey
The specific placement quantity of instrument and specific regional location are measured, technical staff is needed according to actual demand to set, not limits herein
It is fixed.
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.
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.
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 detecting system, which is characterized in that including：Measuring instrument and host, during the measuring instrument includes
Component；
The neutron source is positioned on the steel plate of concrete surface covering, for emitting fast neutron to the concrete；
The measuring instrument is for measuring the steel plate, and sub-count is hankered in position at different two from the neutron source
Rate, and the count rate ratio of the thermal neutron counting rate of position at be calculated described two is sent to the host；
The host is used to obtain the thickness of the steel plate, and searched according to the thickness count rate ratio that receives with
The correspondence of concrete void depth；The corresponding concrete of the count rate ratio is determined according to the correspondence
It comes to nothing depth.
2. concrete void detecting system as described in claim 1, which is characterized in that the measuring instrument further includes：Processing is single
Member, the first thermal-neutron detector and the second thermal-neutron detector；
First thermal-neutron detector and second thermal-neutron detector are placed on the steel plate of concrete surface covering, institute
It states the first thermal-neutron detector and second thermal-neutron detector is respectively used to obtain from the neutron source apart from different
The thermal neutron counting rate N1 of position and thermal neutron counting rate N2 at two；
The processing unit is for reading the thermal neutron counting rate N1 and thermal neutron counting rate N2, and the N1 that will be calculated
It is sent to the host with the count rate ratio of N2.
3. concrete void detecting system as claimed in claim 2, which is characterized in that measure the coagulation in the measuring instrument
On the steel plate of native surface covering, before the thermal neutron counting rate from the neutron source apart from position at different two, further include：It is right
The measuring instrument is measured, to obtain the count rate ratio and the concrete void depth in the case of different steel plate thickness
Correspondence：
It is described that the measuring instrument is measured, to obtain the count rate ratio and the coagulation in the case of different steel plate thickness
Soil comes to nothing the correspondence of depth, including：
The processing unit is calculated when being covered in the steel plate sample thickness H=H1 of concrete surface, and steel plate sample is mixed with described
The thermal neutron counting rate and second thermal neutron detection of corresponding first thermal-neutron detector of distance d values on solidifying soil surface
The count rate ratio of the thermal neutron counting rate of device, and the count rate ratio is sent to the host；
The host receives the count rate ratio, and the thickness H and the count rate ratio are associated storage, obtains
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 is concrete void depth d with concrete surface distance d；
The processing unit calculates steel plate sample and the concrete surface distance d values corresponding described first when H is adjusted
The count rate ratio of the thermal neutron counting rate of the thermal neutron counting rate of thermal-neutron detector and second thermal-neutron detector is simultaneously
It is sent to the host；The host receives the count rate ratio, and the thickness H is closed with the count rate ratio
The operation for joining storage, in the case of obtaining different H, the count rate ratio is corresponding with the concrete void depth d to close
System.
4. concrete void detecting system as claimed in claim 2, which is characterized in that the measuring instrument includes and the neutron
The fixed multiple first kind thermal-neutron detectors in source position, and with the fixed multiple second class thermal neutrons in the neutron source position
The thermal neutron probe area of detector, the first kind thermal-neutron detector is more than the second class thermal-neutron detector, described
First kind thermal-neutron detector and the second class thermal-neutron detector are placed in the steel plate of concrete surface covering；
On the steel plate for obtaining the concrete surface covering, from the thermal neutron meter of neutron source position at different two
Before digit rate N1 and thermal neutron counting rate N2, further include：
The host obtains the thickness of the steel plate, and judges whether the thickness of the steel plate is more than preset thickness；
If the thickness of the steel plate is more than the preset thickness, the host is selected from the multiple first kind thermal-neutron detector
Take out first thermal-neutron detector and second thermal-neutron detector；
If the thickness of the steel plate is less than or equal to the preset thickness, the host is from the multiple second class thermal neutron detection
First thermal-neutron detector and second thermal-neutron detector are selected in device.
5. concrete void detecting system as described in claim 1, which is characterized in that the measuring instrument further includes：Processing is single
First and multiple thermal-neutron detectors；
The multiple thermal-neutron detector is placed on the steel plate of concrete surface covering, for obtaining the concrete surface covering
Steel plate on, the thermal neutron counting rate from the neutron source apart from different plurality of positions；
The processing unit for filtered out from the multiple thermal-neutron detector the first required thermal-neutron detector and
Second thermal-neutron detector；
The processing unit is additionally operable to read the thermal neutron counting rate N1 of first thermal-neutron detector and second heat
Neutron detector thermal neutron counting rate N2, and the count rate ratio of the N1 being calculated and N2 is sent to the host.
6. concrete void detecting system as described in claim 1, which is characterized in that the measuring instrument further includes：Processing is single
First and multiple thermal-neutron detectors；
The multiple thermal-neutron detector is placed on the steel plate of concrete surface covering, for obtaining the concrete surface covering
Steel plate on, the thermal neutron counting rate from the neutron source apart from different plurality of positions；
The processing unit reads thermal neutron counting rate corresponding with the multiple thermal-neutron detector and is sent to described
Host；
The host carries out combination of two to the multiple thermal-neutron detector, and is visited according to the multiple thermal neutron received
The corresponding thermal neutron counting rate of device is surveyed, the count rate ratio of each combination is calculated separately；
The count rate ratio of each combination is distinguished corresponding standard proportional threshold value and carries out mathematic interpolation by the host, and will
Thermal-neutron detector in the maximum combination of absolute difference is hankered as first thermal-neutron detector and described second
Sub- detector；
The processing unit reads the thermal neutron counting rate N1 of first thermal-neutron detector and second thermal neutron is visited
Device thermal neutron counting rate N2 is surveyed, and the count rate ratio of the N1 being calculated and N2 is sent to the host.
7. concrete void detecting system as described in claim 1, which is characterized in that the measuring instrument further includes：Processing is single
First and multiple thermal-neutron detectors；
The multiple thermal-neutron detector is placed in the steel plate of concrete surface covering, for obtaining the concrete surface covering
On steel plate, the thermal neutron counting rate from the neutron source apart from different plurality of positions；
The host is additionally operable to receive detector selection instruction input by user, and is chosen and instructed from described according to the detector
Required first thermal-neutron detector and second thermal-neutron detector are filtered out in multiple thermal-neutron detectors；
The thermal neutron counting rate N1 and described second that the processing unit is used to read first thermal-neutron detector hankers
Sub- detector thermal neutron counting rate N2, and the count rate ratio of the N1 being calculated and N2 is sent to the host.
8. concrete void detecting system as described in claim 1, which is characterized in that the host is according to the correspondence
Determine 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.
9. concrete void detecting system as described in claim 1, which is characterized in that in the host according to the corresponding pass
After system determines the corresponding concrete void depth of the count rate ratio, further include：
The position for the concrete void that the host record detects every time, and the concrete void obtained based on record
Position generates concrete void areally-distributed data.
10. a kind of concrete void detecting system, which is characterized in that including：Measuring instrument and host, during the measuring instrument includes
Component；
The neutron source is positioned on the steel plate of concrete surface covering, for emitting fast neutron to the concrete；
The measuring instrument is for measuring the steel plate, and sub-count is hankered in position at different two from the neutron source
Rate, and the thermal neutron counting rate of position at be calculated described two is sent to the host；
The host is used to calculate the count rate ratio of the thermal neutron counting rate of position at described two received, obtains the steel
The thickness of plate, and search according to the thickness correspondence of the count rate ratio and concrete void depth；According to described
Correspondence determines the corresponding concrete void depth of the count rate ratio.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810257825.XA CN108801183B (en) | 2018-03-27 | 2018-03-27 | A kind of concrete void detection system |
| PCT/CN2018/081734 WO2019183995A1 (en) | 2018-03-27 | 2018-04-03 | Concrete void detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810257825.XA CN108801183B (en) | 2018-03-27 | 2018-03-27 | A kind of concrete void detection system |
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| CN108801183B CN108801183B (en) | 2019-10-29 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109507743A (en) * | 2018-12-04 | 2019-03-22 | 南京航空航天大学 | A kind of high-precision scanning detecting a mine device and scanning detection method |
| 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 |
| CN112345566A (en) * | 2020-11-25 | 2021-02-09 | 安徽省城建设计研究总院股份有限公司 | Portable building wall connection neutron scattering imaging system for quality detection |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4092536A (en) * | 1976-05-27 | 1978-05-30 | Texaco Inc. | Method for detecting cement voids or borehole washouts |
| CN1073013A (en) * | 1992-11-17 | 1993-06-09 | 水利部交通部能源部南京水利科学研究院 | Detect the method for concrete porosity under steel plate with neutron technology |
| JP2002221503A (en) * | 2001-01-25 | 2002-08-09 | Mirai Group Co Ltd | Distinction method for concrete-unfilled part and distinction method for tile detachment from concrete |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3831812B2 (en) * | 1999-06-25 | 2006-10-11 | 株式会社竹中工務店 | Radiation shielding performance monitoring method and equipment of concrete structure for radiation shielding after curing |
| JP2002214392A (en) * | 2001-01-19 | 2002-07-31 | Ishikawajima Harima Heavy Ind Co Ltd | Vitrified storage facility |
| JP5389555B2 (en) * | 2009-07-14 | 2014-01-15 | 株式会社竹中工務店 | Method for calculating the thickness of a gap generated in a filler inside a board to be inspected of a building member, and a computer program and an inspection apparatus suitable for executing this calculation method |
| CN108693201B (en) * | 2018-03-27 | 2020-07-07 | 深圳市中核共创科技有限公司 | Measuring instrument for concrete void detection |
| CN108548833B (en) * | 2018-03-27 | 2020-07-07 | 深圳市中核共创科技有限公司 | Concrete void detection method and device and terminal equipment |
-
2018
- 2018-03-27 CN CN201810257825.XA patent/CN108801183B/en active Active
- 2018-04-03 WO PCT/CN2018/081734 patent/WO2019183995A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4092536A (en) * | 1976-05-27 | 1978-05-30 | Texaco Inc. | Method for detecting cement voids or borehole washouts |
| CN1073013A (en) * | 1992-11-17 | 1993-06-09 | 水利部交通部能源部南京水利科学研究院 | Detect the method for concrete porosity under steel plate with neutron technology |
| JP2002221503A (en) * | 2001-01-25 | 2002-08-09 | Mirai Group Co Ltd | Distinction method for concrete-unfilled part and distinction method for tile detachment from concrete |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109507743A (en) * | 2018-12-04 | 2019-03-22 | 南京航空航天大学 | A kind of high-precision scanning detecting a mine device and scanning detection method |
| CN112345566A (en) * | 2020-11-25 | 2021-02-09 | 安徽省城建设计研究总院股份有限公司 | Portable building wall connection neutron scattering imaging system for quality detection |
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| WO2019183995A1 (en) | 2019-10-03 |
| CN108801183B (en) | 2019-10-29 |
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