CN108801183B - A kind of concrete void detection system - Google Patents
A kind of concrete void detection system Download PDFInfo
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- CN108801183B CN108801183B CN201810257825.XA CN201810257825A CN108801183B CN 108801183 B CN108801183 B CN 108801183B CN 201810257825 A CN201810257825 A CN 201810257825A CN 108801183 B CN108801183 B CN 108801183B
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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 detection system, comprising: measuring instrument and host, measuring instrument include neutron source；Neutron source is placed 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 corresponding relationship 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 corresponding relationship.The embodiment of the present invention saves a large amount of cumbersome operations, greatly improves the practical efficiency to concrete void depth measurement.
Description
Technical field
The invention belongs to neutron detection technical field more particularly to a kind of concrete void detection systems.
Background technique
In the building such as modern large-scale hydroelectric project, traffic engineering, Chang Huiyou concrete structure needs to make back boxing with steel plate
Or composite force structure, generally there are pressure tunnel or pipe hole, Large-sized Communication immersed tunnel structure, high-speed rail plate etc..For there is pressure tunnel
Hole, Large-sized Communication immersed tunnel structure etc. make to be poured matter due to unavoidable some technological problems in construction and field working conditions limitation
Amount, which is affected, causes concrete to be difficult to fill closely knit, is especially easy to produce 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 project inputs operation when deformation instability damage it is huge hidden
Suffer from, it will seriously threaten engineering operation safety.In order to guarantee the safety of engineering, it is necessary to a kind of scientific, efficient, accurate, safety
Detection method go detection come to nothing and cavity position and depth, with for the punching in later period 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 and 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 by gravel aggregate, coarse sand and cement plus one
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 such as steel plate of atomic weight 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, wear fast neutron by neutron source sending
Coagulation soil interaction under certain thickness steel plate and steel plate is crossed, fast neutron can be decelerated at this time, slowing down forms thermal neutron, then benefit
Thermal neutron counting rate is detected with thermal-neutron detector, if due to the concrete that is poured under steel plate in the plane with a depthkeeping
Non-uniform mass in range is spent, i.e., cavity or cavity defect, the thermal neutron counting rate of the site tests will be sent out if it exists
Changing, therefore handled based on the thermal neutron counting rate detected, it can be realized 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 benefit
Detecting cavity with Neutron Scattering Method or coming to nothing 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 lower,
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
Will cause perforations adding 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, the steel plate and coagulation that are used due to different detection scenes
The actual conditions difference of soil, therefore the live steel plate thickness for required detection, concrete are all needed not before each detection
The measurement 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
Point thermal neutron counting rate off-line analysis determine exist come to nothing or cavity position after, just can be carried out sentencing for depth of coming to nothing
It is disconnected, the very complicated inconvenience of operational circumstances, while replacement detection scene need to re-start model construction and measurement experiment again every time, imitate
Rate is low.
Summary of the invention
In view of this, the embodiment of the invention provides concrete void detection 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 detection system, comprising:
Measuring instrument and host, the measuring instrument include neutron source；
The neutron source is placed 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 corresponding relationship of value and concrete void depth；Determine that the count rate ratio is corresponding described mixed according to the corresponding relationship
Solidifying soil comes to nothing depth.
The second aspect of the embodiment of the present invention provides a kind of concrete void detection system, comprising:
Measuring instrument and host, the measuring instrument include neutron source；
The neutron source is placed 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 corresponding relationship of the count rate ratio Yu concrete void depth according to the thickness；According to
The corresponding relationship determines the corresponding concrete void depth of the count rate ratio.
Existing beneficial effect is the embodiment of the present invention compared with prior art: fast due to issuing 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 also will receive steel plate thickness, concrete moisture content and come to nothing or the influence of empty depth, for same coagulation
For soil, water content to the slowing down and scattering power of neutron be it is fixed, i.e., to measuring instrument, station acquisition is arrived at two
The influence of thermal neutron counting rate is consistent, and coming to nothing in concrete or empty meeting so that thermal neutron more accessible to from neutron source
It comes to nothing simultaneously so that measuring instrument generates larger difference in the thermal neutron counting rate that two positions receive farther position
The different meetings of depth are so that this difference further generates variation, and this bigger difference of the depth value that comes to nothing is bigger.Therefore logical
Ratio calculation will be carried out apart from the thermal neutron counting rate that different positions measures from neutron source at two by crossing, and can be eliminated 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 concrete is inquired based on preset corresponding relationship and is taken off
The size of empty depth can be realized the direct detection to concrete void and empty depth value, get rid of 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 come to
The data arrived carry out exceptional value judgement and the amendment of on-site test data and Off-line data analysis, to save a large amount of numerous
Trivial operation greatly improves the practical efficiency to concrete void depth measurement.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the system interaction figure for the concrete void detection 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 to measuring instrument measurement that the embodiment of the present invention three provides；
Fig. 4 A is the structural schematic diagram for the measuring instrument that the embodiment of the present invention four provides；
Fig. 4 B is the implementation process schematic diagram 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 detection system that the embodiment of the present invention seven provides；
Fig. 8 is the system structure diagram for the concrete void detection system that the embodiment of the present invention eight provides.
Specific embodiment
In being described below, for illustration and not for limitation, the tool of such as particular system structure, technology etc is proposed
Body details, to understand thoroughly the embodiment of the present invention.However, it will be clear to one skilled in the art that there is no these specific
The present invention also may be implemented in the other embodiments of details.In other situations, it omits to well-known system, device, electricity
The detailed description of road and method, in case unnecessary details interferes description of the invention.
In order to illustrate technical solutions according to the invention, the following is a description of specific embodiments.
The existing technology detected using neutron to concrete void is all to be launched using neutron source to steel plate and concrete
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 according to single thermal-neutron detector the detection come to nothing
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 respectively and build, 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 establish different steel plates
In the case where 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, and each independent variable must be weighed when changing since three kinds of factors belong to the independent variable factor in experiment
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 thermal neutron counting rate and the corresponding relation data table for depth of coming to nothing that single thermal-neutron detector receives
Become huge, needs to expend a large amount of manpower and material resources and go to carry out repeating experimental record, efficiency is very low.
On the other hand, on the basis of above-mentioned prior art measurement experiment, staff carries out to engineering scene to be measured
When concrete void detects, need to make needed for being determined 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, the concrete for scene to be measured for most of engineering, in actual concrete moisture content and measurement 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 measurement experiment, analysis and immediate concrete sample water content difference
How, if difference is smaller, directly using the immediate corresponding relation data table of concrete sample water content as reference, Lai Shixian
Detection to concrete void depth, although doing so the detection being able to achieve to concrete void depth, its number detected
According to biggish error is certainly existed, cause accidentally to beat irrigation hole.And when differing greatly, corresponding relationship number obtained in measurement experiment
It can not need first to carry out unified survey comprehensively to entire engineering scene to be measured at this time in the prior art directly with reference to using according to table
After amount, the relatively relatively low abnormal point of thermal neutron counting rate therein is found out, then come to nothing actual depth to abnormal point hole measurement of drilling,
And data correction is carried out to corresponding relation data table obtained in measurement experiment using obtained depth data, it later could be normal
Depth measurement of coming to nothing is carried out using revised corresponding relation data table.However in actual conditions, the engineering of required measurement is waited for
Survey that the general area in scene is all bigger, but the measuring instrument volume for detecting depth of coming to nothing often it is smaller can measure every time show
Scene product is smaller, and thermal neutron counting rate statistics requires 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, measurement requires 1-2 points every time
Clock time, practical concrete moisture content difference is excessive at this time, needs to complete for actual measurement at least 2000 times to be measured to engineering
The measurement at scene, it is at least 50 hours or more time-consuming, 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 distributed data that specifically comes to nothing, it is therefore desirable to expend a large amount of manpower and material resources 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, concrete progress vacant analysis is mixed the invention proposes a kind of
Solidifying soil vacant analysis system, to promote the efficiency detected to concrete void.
Fig. 1 shows the system interaction figure of the concrete void detection system of the offer of the embodiment of the present invention one, and details are as follows:
Concrete void detection system includes: measuring instrument and host, and measuring instrument includes neutron source.
Used in order to improve the efficiency to concrete void detection, in the embodiment of the present invention at two with neutron source distance
Different positions is synchronous 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 issued 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 will receive 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
Empty meeting so that 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 different meetings for depth of coming to nothing are so that this difference further generates variation, and takes off
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
A count rate ratio for the acquisition of thermal neutron counting rate being carried out apart from different positions from neutron source and calculate the two, then base
The size that concrete void depth is inquired in the corresponding relationship set can be realized to concrete void and empty depth
The direct detection of value.
Neutron source is placed on the steel plate of concrete surface covering, for emitting fast neutron to concrete.
Based on the above principles, in order to realize the detection to concrete void, the embodiment of the present invention begins with neutron source
Emit fast neutron to the concrete for being covered with steel plate.Wherein, it is real as the present invention that some common neutron sources in nuclear technology can be selected
The neutron source in example is applied, including but not limited to such as241Am-Be neutron source,239Pu-Be neutron source and252Cf neutron source 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, at the same excessive scattering meeting so that the obtained thermal neutron counting rate of thermal-neutron detector by certain
Influence so that the concrete void result that measuring instrument of the embodiment of the present invention finally measures will receive a degree of shadow
It rings, reduces the accuracy of detection, therefore one layer of shielded layer can 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.Wherein the material of 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 subsequent host uses, wherein two positions and neutron
The specific distance in source can be set according to actual needs by technical staff.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 contain at least two the thermal neutron that can carry out 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
Machine can be carried out data transmission by the way of wired connection, such as use 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
Host can be by the way of being wirelessly connected to carry out data transmission, 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 be attached as the connection type of measuring instrument and host, 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 corresponding relationship 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 corresponding relationship of count rate ratio in the case of different steel plate thickness and concrete void depth in advance, and right
Measurement experiment result carries out record storage so that for subsequent inquiry use, therefore, the embodiment of the present invention is getting counting rate ratio
After value, the corresponding relationship needed for this time detecting need to be only found out from stored measurement experiment result according to the thickness of steel plate
.Wherein the method for specific measurement 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 corresponding relationship.
After finding out the corresponding relationship needed for this time detecting, according to each count rate ratio recorded in corresponding relationship
Corresponding concrete void depth is searched, you can learn that this time in the 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 corresponding relationship
When depth, further includes:
If non-recording gauge digit rate ratio in corresponding relationship, using interpolation method in corresponding relationship and 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 to different steel plate thickness count rate ratio and concrete void depth pair
It should be related to that the concrete void depth profile that can be simulated all is limited and discrete value, corresponding when being measured experiment
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 corresponding relationship, for example, it is assumed that count rate ratio and concrete void that measurement experiment obtains are deep
The corresponding relationship of degree is table 1, and the count rate ratio surveyed is 0.71, can not be found out using obtained corresponding relationship 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 guarantee in the case where measured count rates ratio is not present in corresponding relationship, detection concrete is remained to
It comes to nothing depth, the embodiment of the present invention will use interpolation method to handle the data in corresponding relationship, 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 corresponding relationship it
In situation occur, improve the accuracy that detect to concrete void, understand obtaining in the embodiment of the present invention based on measurement 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, required concrete void depth can be obtained.
In the embodiment of the present invention only thermal neutron counting rate need to be carried out apart from different positions from neutron source using two
The count rate ratio for acquiring and both calculating, then to inquire based on the corresponding relationship set concrete void depth big
It is small, the direct detection to concrete void and empty depth value can be realized, concrete must be directed in the prior art by getting rid of
Water content is different to carry out the case where modeled, and also need water content practical according to measure field concrete to obtained data
Constant value judgement and the amendment of field data greatly improve practical to concrete to save a large amount of cumbersome operations
It comes to nothing the efficiency of depth measurement.
As another embodiment of the invention, in order to further increase to engineering on-site concrete vacant analysis to be measured
Accuracy, can be on the basis of the embodiment of the present invention one, in conjunction with being visited in the prior art based on single thermal neutron in the embodiment of the present invention
The detection method for surveying the thermal neutron counting rate of device acquisition single location respectively detects 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 includes:
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 thermal neutron counting rate obtained in the embodiment of the present invention one is directly sent to host, single location is also possible to independence
Position at the third of position, is sent to host 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 corresponding relationship.
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 include: 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, it is hot as first in the embodiment of the present invention that some common thermal-neutron detectors in nuclear technology can be selected
Neutron detector 12 and the second thermal-neutron detector 13, including but not limited to as THGEM thermal-neutron detector, lithium glass flash
Detector,3He direct ratio 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 is also possible to the form of N2/N1
Member is voluntarily set.
Processing unit is mainly used for carrying out thermal neutron counting rate in measuring instrument the operations such as processing transmission, 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), 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, be also possible to any conventional place
Device etc. is managed, can specifically be chosen according to actual needs by technical staff.
As the embodiment of the present invention three, as shown in figure 3, on the steel plate of measuring instrument measurement concrete surface covering, in
Before thermal neutron counting rate of the component apart from position at different two, further includes: be measured to measuring instrument, to obtain different steel
The corresponding relationship 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
Corresponding relationship, comprising:
S301, processing unit are calculated when being covered on the steel plate sample thickness H=H1 of concrete surface, steel plate sample and mixed
The thermal neutron counting rate of corresponding first thermal-neutron detector of distance d value 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 corresponding relationship 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 on concrete surface, is come to nothing using steel plate sample with concrete surface distance d simulation concrete 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 is 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 corresponding relationship, it is preferable that can be by the concrete void surveyed in practical engineering application depth
As the basis d value range, then in basic value range, multiselect takes different d values to be measured reality to angle value as much as possible
It tests.
S303, processing unit is when H is adjusted, calculating steel plate sample corresponding first heat with concrete surface distance d value
The count rate ratio of the thermal neutron counting rate of the thermal neutron counting rate and the second thermal-neutron detector of 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 corresponding relationship 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 corresponding relationship 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 also be unlike in the embodiment of the present invention two when being measured experiment as another 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 measurement experiment of the steel plate sample of different-thickness needs to use multiple hairs simultaneously at this time to promote the efficiency of measurement experiment
Measuring instrument in bright embodiment one.The measurement experiment method of actual use can be determined according to the actual situation by technical staff,
It not limits herein.
Wherein should explanatorily, thermal-neutron detector is at a distance from neutron source either fixed in embodiments of the present invention
, the position of thermal-neutron detector and neutron source is solidified 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 carries 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 measurement experiment and the second thermal-neutron detector is at a distance from neutron source,
All should with the measuring instrument of the embodiment of the present invention two use when the first thermal-neutron detector and neutron source at a distance from and second
Thermal-neutron detector is identical at a distance from neutron source, and to guarantee the accuracy detected to concrete void, detailed description are as follows:
Since thermal-neutron detector can also make the thermal neutron quantity that thermal-neutron detector receives at a distance from neutron source
At influence, i.e., can the thermal neutron counting rate to thermal-neutron detector have an impact, but the design and engineering of actual measurement instrument wait for
It surveys in on-site test, 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 guarantee accurately having for collected neutron count rate
Effect, it is necessary to placement is fixed in thermal-neutron detector and neutron source, therefore in the detection of each concrete void, thermal neutron
Detector is fixed at a distance from neutron source.Therefore, in order to guarantee to concrete void detect accuracy, it is preferable that
The embodiment of the present invention needs synthesis to examine when the corresponding relationship 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 on-site test to be measured with
Two when measurement experiment apart from identical, can eliminate together this error, so measurement 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 when measurement experiment, and measurement is being used by engineering field technician to be measured
When instrument is tested, chooses measurement experiment result corresponding with actual range situation and detected as the data source of corresponding relationship.
As the embodiment of the present invention four, as shown in Figure 4 A, measuring instrument includes the multiple first kind fixed with neutron source position
Thermal-neutron detector, and the multiple second class thermal-neutron detectors fixed with neutron source position, first kind thermal-neutron detector
Thermal neutron probe area be greater 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 includes:
S401, host obtain the thickness of steel plate, and judge whether the thickness of steel plate is greater than preset thickness.
S402, if the thickness of steel plate is greater 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 it is every it is a kind of comprising multiple thermal-neutron detectors as alternative, 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 greater than preset thickness, if more than the irradiated area for then illustrating thermal neutron
It is larger, select first kind thermal-neutron detector as the selection pair of two thermal-neutron detectors needed for this detection at this time
As.Conversely, then selecting the second class thermal-neutron detector as the selection pair of two thermal-neutron detectors needed for this detection
As.Wherein, the occurrence of preset thickness can be chosen according to the actual situation by technical staff, it is preferable that 40mm can be selected and make
For required preset thickness.
As a kind of possible implementation of the 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 implementation, and details refer to following realities
Apply example:
As the embodiment of the present invention five, as shown in figure 5, measuring instrument further include: 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, for obtaining the steel of concrete surface covering
Thermal neutron counting rate on plate, 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
It may cause the collected thermal neutron counting rate of thermal-neutron detector and generate variation, to the counting rate ratio of two thermal-neutron detectors
Value generates certain influence.Therefore, it in order to improve the validity of the count rate ratio used, is promoted and concrete void is detected
Accuracy can preset multiple thermal-neutron detectors in the embodiment of the present invention, and therefrom select two optimal groups when in use
It closes as original thermal neutron count rate ratio data source.Such as in the embodiment of the present invention four, for every 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 guarantee the validity of count rate ratio.
As the embodiment of the present invention six, as shown in fig. 6, measuring instrument further include: processing unit and multiple thermal neutron detections
Device.
Multiple thermal-neutron detectors are placed on the steel plate of concrete surface covering, for obtaining the steel of concrete surface covering
Thermal neutron counting rate on plate, 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 each combined count rate ratio.
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！].
Each combined count rate ratio 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 in measurement experiment, two heat when the concrete void depth d of simulation is 0
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 measured experiment respectively in advance for every kind of combination, with true
It is corresponding under different steel plate thickness to make the combination, the corresponding relationship 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 for 6 kinds of combined situation difference
It is measured experiment, to obtain 6 groups of different corresponding relationships.But it should explanatorily, as needed for the embodiment of the present invention only
It is the value of current count rate ratio and the difference ideally of d=0, therefore chooses carrying out corresponding relationship 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
Corresponding relationship under stack pile.When difference maximum absolute value, due to the fixed shadow to thermal-neutron detector of steel plate thickness
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 can be realized in Practical Project scene to be measured as required the first thermal-neutron detector and the second thermal-neutron detector
Concrete come to nothing or cavity situation it is complex when, also can preferably guarantee to concrete void detect accuracy, mention
The efficiency of high detection.
It is visited as the first thermal-neutron detector and the second thermal neutron for filtering out required 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 each combined count rate ratio, then obtained each combined count rate ratio is sent out
It send to host.
The each combined count rate ratio received is distinguished corresponding standard proportional threshold value and carries out difference by host
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 thermal-neutron detector and the second thermal neutron for filtering out required from multiple thermal-neutron detectors
Another specific implementation of device is surveyed, the execution of steps all in the embodiment of the present invention six can also be handled and be disposed as locating
Unit is managed, i.e., only completes the screening to the first thermal-neutron detector and the second thermal-neutron detector 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 each combined count rate ratio.
Each combined count rate ratio is distinguished corresponding standard proportional threshold value and carries out difference calculating 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 thermal-neutron detector and the second thermal neutron for filtering out required 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, for obtaining the steel plate of concrete surface covering
On, the thermal neutron counting rate from neutron source apart from different plurality of positions.
The detector that host is also used to receive user's input chooses instruction, 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
Situation, if may result in obtain the data of mistake, therefore implement in the present invention at this time according to count rate ratio come automatic screening
The function of choosing manually is provided for user in example, to provide further guarantee to detect 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 includes:
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.In order to facilitate technical staff use and it is subsequent come to nothing the analysis of situation to engineering scene to be measured, the present invention is 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 on-site test 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 of the concrete void detection system of the offer of the embodiment of the present invention seven, and details are as follows:
Concrete void detection system, comprising: measuring instrument and host, measuring instrument include neutron source.
Neutron source is placed 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 corresponding relationship.
S703 determines the corresponding concrete void depth of count rate ratio according to corresponding relationship.
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 of processing is arranged among host, so that some low side embedded chips need to only be used to can be completed 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 is to counting
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 detection 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, for the demand of further satisfaction practical application, in above-mentioned implementation
On the basis of the concrete void detection system that example provides, further includes:
Concrete void detection system, comprising: host and multiple measuring instruments.
Each measuring instrument is placed on the measurement steel plate at engineering live different zones to be measured, and for measuring corresponding region
On steel plate, from the counting of position thermal neutron counting rate at thermal neutron counting rate or two of the 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 depth detection of coming to nothing only is carried out using only a measuring instrument at this time, the efficiency inevitable very low required time expended
Will be too long, therefore, for further satisfaction 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 amount instrument and specific regional location, need technical staff to set according to actual needs, not limit 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 function
Can unit, module division progress for example, in practical application, can according to need and by above-mentioned function distribution by different
Functional unit, module are completed, i.e., the internal structure of described device is divided into different functional unit or module, more than completing
The all or part of function of description.Each functional unit in embodiment, module can integrate in one processing unit, can also
To be that each unit physically exists alone, can also be integrated in one unit with two or more units, it is above-mentioned integrated
Unit both can take the form of hardware realization, can also realize in the form of software functional units.In addition, each function list
Member, the specific name of module are also only for convenience of distinguishing each other, the protection scope 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 be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician
Described function can be specifically realized using distinct methods to each, but this realization is it is not considered that beyond this
The range of invention.
In embodiment provided by the present invention, it should be understood that disclosed terminal device and method can pass through it
Its mode is realized.For example, terminal device embodiment described above is only schematical.For example, the module or list
Member division, only a kind of logical function partition, there may be another division manner in actual implementation, for example, 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
Show or the mutual coupling or direct-coupling or communication connection that discusses can be through some interfaces, between device or unit
Coupling or communication connection are connect, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although referring to aforementioned reality
Applying example, invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features；And these are modified
Or replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution should all
It is included within protection scope of the present invention.
Claims (10)
1. a kind of concrete void detection system characterized by comprising measuring instrument and host, during the measuring instrument includes
Component；
The neutron source is placed 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 for measuring the thermal neutron counting rate of position at described two obtained 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 corresponding relationship of concrete void depth, wherein be measured in advance with the measuring instrument, in the case of obtaining different steel plate thickness
The corresponding relationship of count rate ratio and concrete void depth, concrete void depth refer to the de- of steel plate and concrete intersection
Empty depth；The corresponding concrete void depth of the count rate ratio is determined according to the corresponding relationship.
2. concrete void detection system as described in claim 1, which is characterized in that the measuring instrument further include: 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
The host is sent to the ratio of N2.
3. concrete void detection system as claimed in claim 2, which is characterized in that described to be surveyed with the measuring instrument
It is fixed, to obtain the corresponding relationship of the count rate ratio and the concrete void depth in the case of different steel plate thickness, comprising:
The processing unit is calculated when being covered on steel plate sample thickness H=H1 of concrete surface, steel plate sample and the coagulation
The thermal neutron counting rate and second thermal-neutron detector of corresponding first thermal-neutron detector of the distance d value on native surface
Thermal neutron counting rate count rate ratio, 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 corresponding relationship 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 value 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 where obtaining different H, the count rate ratio is corresponding with the concrete void depth d to be closed
System.
4. concrete void detection 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 the multiple second class thermal neutrons fixed with the neutron source position
Detector, the thermal neutron probe area of the first kind thermal-neutron detector are greater than the probe of the second class thermal-neutron detector
Area, the first kind thermal-neutron detector and the second class thermal-neutron detector are placed in the steel of concrete surface covering
Plate；
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 includes:
The host obtains the thickness of the steel plate, and judges whether the thickness of the steel plate is greater than preset thickness；
If the thickness of the steel plate is greater 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 detection system as described in claim 1, which is characterized in that the measuring instrument further include: 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 be used to filter out from the multiple thermal-neutron detector required the first thermal-neutron detector and
Second thermal-neutron detector；
The processing unit be also used to read first thermal-neutron detector thermal neutron counting rate N1 and it is described 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 detection system as claimed in claim 2, which is characterized in that the measuring instrument further include: 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, each combined count rate ratio is calculated separately；
Each combined count rate ratio is distinguished corresponding standard proportional threshold value and carries out difference calculating 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 detection system as claimed in claim 2, which is characterized in that the measuring instrument further include: 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
Thermal neutron counting rate on steel plate, from the neutron source apart from different plurality of positions；
The detector that the host is also used to receive user's input chooses instruction, 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 detection system as described in claim 1, which is characterized in that the host is according to the corresponding relationship
Determine the corresponding concrete void depth of the count rate ratio, comprising:
If the count rate ratio is not recorded in the corresponding relationship, using interpolation method in the corresponding relationship with the counting
Data similar in rate ratio are handled, to obtain the corresponding concrete void depth of the count rate ratio.
9. concrete void detection system as described in claim 1, which is characterized in that in the host according to the corresponding pass
System determines after the corresponding concrete void depth of the count rate ratio, further includes:
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 detection system characterized by comprising measuring instrument and host, during the measuring instrument includes
Component；
The neutron source is placed 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 for measuring position at described two obtained 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 corresponding relationship of the count rate ratio Yu concrete void depth, wherein in advance
It is measured with the measuring instrument, obtains count rate ratio pass corresponding with concrete void depth in the case of different steel plate thickness
System, concrete void depth refer to the depth of coming to nothing of steel plate Yu concrete intersection；It is determined according to the corresponding relationship described
The corresponding concrete void depth of 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 |
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| 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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| CN108801183A CN108801183A (en) | 2018-11-13 |
| CN108801183B true CN108801183B (en) | 2019-10-29 |
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| CN201810257825.XA Active CN108801183B (en) | 2018-03-27 | 2018-03-27 | A kind of concrete void detection system |
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| WO (1) | WO2019183995A1 (en) |
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| 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 |
| CN109507743B (en) * | 2018-12-04 | 2020-04-28 | 南京航空航天大学 | A high-precision scanning mine detection device and scanning detection method |
| CN112345566B (en) * | 2020-11-25 | 2024-07-26 | 安徽省城建设计研究总院股份有限公司 | Neutron scattering imaging system for detecting connection quality of portable building wall |
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| 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 |
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| 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 |
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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 |
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| WO2019183995A1 (en) | 2019-10-03 |
| CN108801183A (en) | 2018-11-13 |
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