CN106645288A - Nondestructive test system for defects of bridge concrete structure and test method thereof - Google Patents
Nondestructive test system for defects of bridge concrete structure and test method thereof Download PDFInfo
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- CN106645288A CN106645288A CN201610874102.5A CN201610874102A CN106645288A CN 106645288 A CN106645288 A CN 106645288A CN 201610874102 A CN201610874102 A CN 201610874102A CN 106645288 A CN106645288 A CN 106645288A
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- 230000007547 defect Effects 0.000 title claims abstract description 26
- 238000012360 testing method Methods 0.000 title abstract description 7
- 238000010998 test method Methods 0.000 title abstract 2
- 238000010438 heat treatment Methods 0.000 claims abstract description 67
- 238000001228 spectrum Methods 0.000 claims abstract description 31
- 238000012545 processing Methods 0.000 claims abstract description 29
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims description 17
- 238000010276 construction Methods 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000013461 design Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 2
- 238000010025 steaming Methods 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 230000005855 radiation Effects 0.000 description 6
- 230000002950 deficient Effects 0.000 description 5
- 238000009659 non-destructive testing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000001931 thermography Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013100 final test Methods 0.000 description 1
- 230000001976 improved effect Effects 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/72—Investigating presence of flaws
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention relates to the technical field of bridge detection and especially relates to a nondestructive test system for defects of a bridge concrete structure. The system comprises a heating unit, a camera unit and an image processing unit, wherein the heating unit is used for quickly heating a to-be-tested bridge concrete structure part; the camera unit is used for acquiring an infrared image spectrum of the surface of the heated bridge concrete structure; the image processing unit is used for receiving the infrared image spectrum acquired by the camera unit and then analyzing and treating the infrared image spectrum so as to obtain bridge defect information. The invention also discloses a test method thereof. When the defect exists in the bridge structure, a difference in temperature exits between the infrared image spectrums acquired by the camera unit; the difference is small under the change state of the natural environmental temperature; the heating unit is used for quickly heating the to-be-tested bridge concrete structure, so that a large temperature difference can be caused; the camera unit in low precision can be used for acquiring an ideal infrared image spectrum, so that the test accuracy is increased, and meanwhile, the camera unit in high precision is not required so that the cost is greatly lowered.
Description
Technical field
The present invention relates to bridge structure technical field of nondestructive testing, more particularly to a kind of bridge concrete fault of construction is lossless
Detecting system and its detection method.
Background technology
Highway bridge building and service phase, due to being overloaded during construction reason or military service, the possibility such as jump in temperature
The defects such as interior void, crack are produced, the bearing capacity or durability for making structure is affected；If cannot timely detect and
Maintenance and reinforcement, it will affect the operation security of bridge, therefore, necessary detection is carried out to bridge concrete inner-defect, show
Obtain very necessary, also there is its realistic meaning.
Infrared thermal imaging technique, is that the infra-red radiation that object sends is received using various detectors, then carries out optical telecommunications
Breath process, finally shown in modes such as numeral, signal, images, and be used find out, observe and study various objects
An integrated technology.It is related to Optical System Design, device physicses, material preparation, micromachined, signal transacting and shows
Show, encapsulate with assembling etc. a series of know-how.The technology can be widely applied to industry, agricultural, medical treatment, fire-fighting, archaeology, friendship
Logical, geology field.
Infrared Non-destructive Testing is a kind of method that the mass of object is identified in measurement by the heat and hot-fluid of object, works as thing
When in vivo portion has crack and defect, it will change the heat transfer of object, make body surface Temperature Distribution create a difference, using red
Outer imager measures its different heat radiations, it may be determined that the defective locations of object, to reach the purpose of detection defect.Using red
Outer thermal imaging method, can delicately detect that thermal conductivity factor is little, the infra-red radiation of the big concrete material of surface thermal emissivity rate.When
When xoncrete structure has certain defect, because defect type form and distribution difference cause material thermal conductivity, mass specific heat
The localized variation of performance and affect amount of infrared radiation, directly resulting in surface temperature changes, and makes occur temperature difference etc. on thermography
Difference.When defective concrete is subject to solar radiation, defective xoncrete structure is due to the presence of defect, substantial amounts of sky
Gas is mixed into, and compared with closely knit position, hot-fluid is incoming hindered, causes skin temperature to raise and occurs " heat on infrared thermal imagery
Spot ", its scope and degree reflect the extent of injury and scope at the position.There is many deficiencies in this detection mode：First, too
The bridge concrete structure that sun radiation is caused heats up not enough substantially, and the infrared thermal imagery in defective region and flawless region is poor
Heteropole is little, also may not necessarily be detected using the very high instrument of precision, and high-precision instrument price is very expensive,
Also result in being significantly increased for testing cost；Second, due to defective region and the infrared thermal imagery difference pole in flawless region
It is little, cause testing result not accurate enough, or even erroneous judgement, it is impossible to the defect of bridge is reflected well；Third, the detection method must
Must carry out when variation of ambient temperature is fast, detection time is limited, it is impossible to bridge is detected at any time.Therefore, even if making
With the infrared thermal imagery instrument of high precision, it is also difficult in being used in detection work.
The content of the invention
The primary and foremost purpose of the present invention is to provide a kind of high precision, the bridge concrete fault of construction Non-Destructive Testing of low cost
System.
To realize object above, the technical solution used in the present invention is：A kind of bridge concrete fault of construction Non-Destructive Testing
System, including heating unit, image unit and graphics processing unit, described heating unit is used for bridge concrete to be detected
Structure division is quickly heated, and image unit is used to obtain the bridge concrete body structure surface infrared image spectrum after heating, figure
As the infrared image that processing unit is used to receive image unit acquisition is composed and obtains bridge defect information after being analyzed and processed.
Compared with prior art, there is following technique effect in the present invention：When bridge concrete inside configuration to be detected is present
During defect, the temperature of infrared image that image unit gets spectrum has differences, under natural environment temperature change state this
Difference is little, by arranging heating unit, bridge structure to be checked is quickly heated, and forms the larger temperature difference, can use low precision
Image unit can just get preferable infrared image spectrum, the accuracy of detection is on the one hand improve, on the other hand because need not
Using high-precision image unit, cost is greatly reduced.
Further object is that providing the lossless inspection of bridge concrete fault of construction of a kind of high precision, low cost
Survey method.
To realize object above, the technical solution used in the present invention is：A kind of bridge concrete fault of construction Non-Destructive Testing
Method, comprises the steps：(A) heating unit is heated to bridge concrete structure to be detected, be heated to design temperature or
Stop heating after time；(B) the bridge concrete structure infrared image that image unit is obtained after heating is composed and exported to image
Processing unit；(C) graphics processing unit is analyzed after process to infrared image spectrum and obtains bridge defect information.
Compared with prior art, there is following technique effect in the present invention：When bridge concrete inside configuration to be detected is present
During defect, the temperature of infrared image that image unit gets spectrum has differences, under natural environment temperature change state this
Difference is little, by arranging heating unit, bridge structure to be checked is quickly heated, and forms the larger temperature difference, can use low precision
Image unit can just get preferable infrared image spectrum, the accuracy of detection is on the one hand improve, on the other hand because need not
Using high-precision image unit, cost is greatly reduced.
Description of the drawings
Fig. 1 is the structural representation of the present invention.
Specific embodiment
With reference to Fig. 1, the present invention is described in further detail.
Refering to Fig. 1, a kind of bridge concrete fault of construction nondestructive detection system, including heating unit 10, image unit 20
With graphics processing unit 30, described heating unit 10 is used to quickly heat bridge concrete structure division to be detected,
Image unit 20 is used to obtain the bridge concrete body structure surface infrared image spectrum after heating, and graphics processing unit 30 is used to receive
Bridge defect information is composed and obtained after being analyzed and processed to the infrared image that image unit 20 is obtained.When bridge concrete to be detected
During inside configuration existing defects, the temperature of infrared image that image unit 20 gets spectrum exist it is variant, in natural environment temperature
This difference is little under degree variable condition, by arranging heating unit 10, bridge structure to be checked is quickly heated, and is formed larger
The temperature difference, just can get preferable infrared image spectrum using the image unit 20 of low precision, on the one hand improve the standard of detection
True property, on the other hand because without using high-precision image unit 20, greatly reducing cost.
The structure of heating unit 10 has many kinds, can be adopted in the present embodiment using various mode of heatings such as electrical heating
Mode of heating that is a kind of more convenient and working well, that is, steam is heated.Preferably, described heating unit
10 include steam engine 12, steam force (forcing) pump 13 and air accumulator 14, and water source 40 is connected by the first valve 11 with steam engine 12, first
The setting of valve 11 and water source 40, convenient to add water in steam engine 12, water turns after the heating and gasifying of heating unit 10 and pressurization
It is changed into steam, by duct injection bridge is heated to the top layer of bridge concrete structure to be detected.By high temperature
Steam carries out heating to bridge structure many benefits：First, in irrigation process, steam has been at bridge knot
The top layer of structure, to bridge continuous heating is carried out；Second, heated due to using steam here, no matter so bridge
What kind of the structure of beam is, can be suitable for, and then not all right by the way of electric boiling plate；Third, the temperature ratio of steam
Higher, heating effect is good；Fourth, vapours can form one layer of thermal insulation layer, it is to avoid heat volatilization in heating process, heating is improved
Effect.
Preferably, heating effect is monitored for convenience, and temperature biography is provided with described bridge concrete structure to be detected
The temperature of bridge, the heating unit when temperature that temperature sensor 50 is collected exceedes given threshold when sensor 50 is used to gather heating
10 stop heating and the start-up operation collection infrared image spectrum of image unit 20.After temperature sensor 50 is set, in that context it may be convenient to
The bridge structure temperature after heating is got, heating also just can be stopped when suitable, be for further processing.Certainly,
Temperature sensor 50 can be not provided with, stopping heating is also possible after heating certain hour, but such precision can be less than
The scheme of temperature sensor 50 is set.
Specifically, image unit 20 and graphics processing unit 30 can be realized by many circuits or components and parts, this reality
In applying example, described image unit 20 is thermal infrared imager, and graphics processing unit 30 is computer or industrial computer, thermal infrared imager
The infrared image spectrum output for collecting to computer or industrial computer, computer or industrial computer the infrared image for receiving is composed into
Row analysis, process obtain bridge defect information.
The invention also discloses a kind of detection method of foregoing bridge concrete fault of construction nondestructive detection system,
Comprise the steps：(A) heating unit 10 is heated to bridge concrete structure to be detected, is heated to design temperature or time
Stop heating afterwards；(B) the bridge concrete structure infrared image that image unit 20 is obtained after heating is composed and exported to image procossing
Unit 30；(C) graphics processing unit 30 is analyzed after process to infrared image spectrum and obtains bridge defect information.Similarly, should
In step, by arranging heating unit 10, bridge concrete structure to be detected is heated, improve this species diversity, reused
The image unit 20 of low precision can just get preferable infrared image spectrum, on the one hand improve accuracy of detection, on the other hand without
High-precision image unit 20 need to be used, cost is reduced.
Preferably, in described step A, described heating unit 10 includes steam engine 12, steam force (forcing) pump 13 and gas storage
Tank 14, water source 40 is connected by the first valve 11 with steam engine 12, and water changes after the heating and gasifying of heating unit 10 and pressurization
For steam, by duct injection bridge is heated to the top layer of bridge concrete structure to be detected.So arrange and add
The benefit of hot cell 10, before described in detail, just repeat no more here.
Preferably, in described step B, image unit 20 is thermal infrared imager, and in step C, graphics processing unit 30 is
Computer or industrial computer；Computer or industrial computer are analyzed process to infrared image spectrum as follows：(C1) operator
Member is input into the basic parameter of bridge concrete structure to be detected in graphics processing unit 30, and graphics processing unit 30 is according to basic
Parameter sets up flawless master pattern；(C2) operating personnel by the heating location in step A, heating-up temperature or time be input into
In graphics processing unit 30, graphics processing unit 30 will obtain standard according to the information for receiving after master pattern simulation heating red
Outer image spectrum；(C3) reality of the survey bridge concrete structure to be detected that graphics processing unit 30 exports image unit 20 is infrared
Image is composed to be composed with the standard IR image in step C2 and carries out color and compare；(C4) by the color difference of the upper each position of infrared image spectrum
Different to correspond in bridge structure, heterochromia is bigger, represents that the defect of bridge structure at the position is bigger, and heterochromia is less than and sets
Determine threshold value, represent bridge structure zero defect at the position.Because when heating is implemented, shower nozzle 16 may be fixed by other supports
At a certain position of bridge structure, so, certain temperature difference is there is also between the position of shower nozzle 16 and other positions, this meeting
Final testing result precision is had influence on, in order to eliminate this influence factor, standard is set up in graphics processing unit 30 here
Defect-free model, be then nested into the master pattern according to heating location, heating-up temperature or time, calculate acquisition standard it is red
Outer image spectrum, finally by the infrared image for collecting spectrum and the spectrum contrast of standard IR image, the precision of such testing result just has
Ensure, the difference of testing result will not be caused because of the difference of heating source position or heating-up temperature.
Claims (7)
1. a kind of bridge concrete fault of construction nondestructive detection system, it is characterised in that：Including heating unit (10), image unit
(20) and graphics processing unit (30), described heating unit (10) to bridge concrete structure division to be detected for carrying out soon
Speed heating, image unit (20) is composed for obtaining the bridge concrete body structure surface infrared image after heating, graphics processing unit
(30) obtain bridge defect information after process for receiving the infrared image spectrum of image unit (20) acquisition and it being analyzed.
2. bridge concrete fault of construction nondestructive detection system as claimed in claim 1, it is characterised in that：Described heating list
First (10) include steam engine (12), steam force (forcing) pump (13) and air accumulator (14), and water source (40) are by the first valve (11) and steaming
Steam turbine (12) is connected, and water is changed into steam after heating unit (10) heating and gasifying and pressurization, is arrived by duct injection
Bridge is heated on the top layer of bridge concrete structure to be detected.
3. bridge concrete fault of construction nondestructive detection system as claimed in claim 1 or 2, it is characterised in that：Described treats
The temperature of bridge, temperature sensor when being provided with temperature sensor (50) for gathering heating in detection bridge concrete structure
(50) heating unit (10) stops heating and image unit (20) is started working and gathered when the temperature for collecting exceedes given threshold
Infrared image is composed.
4. bridge concrete fault of construction nondestructive detection system as claimed in claim 3, it is characterised in that：Described shooting list
First (20) are thermal infrared imager, and graphics processing unit (30) is computer or industrial computer, the infrared figure that thermal infrared imager is collected
As spectrum output is to computer or industrial computer, computer or industrial computer are analyzed, process to the infrared image spectrum for receiving
To bridge defect information.
5. a kind of detection method of bridge concrete fault of construction nondestructive detection system as claimed in claim 1, including it is as follows
Step：
(A) heating unit (10) is heated to bridge concrete structure to be detected, is heated to design temperature or is stopped after the time
Heating；
(B) the bridge concrete structure infrared image that image unit (20) is obtained after heating is composed and exported to graphics processing unit
(30)；
(C) graphics processing unit (30) is analyzed after process to infrared image spectrum and obtains bridge defect information.
6. bridge concrete fault of construction lossless detection method as claimed in claim 5, it is characterised in that：Described step A
In, heating unit (10) includes steam engine (12), steam force (forcing) pump (13) and air accumulator (14), and water source (40) are by the first valve
(11) it is connected with steam engine (12), water is changed into steam after heating unit (10) heating and gasifying and pressurization, by pipe
Road is ejected into the top layer of bridge concrete structure to be detected and bridge is heated.
7. bridge concrete fault of construction lossless detection method as claimed in claim 6, it is characterised in that：Described step B
In, image unit (20) is thermal infrared imager, and in step C, graphics processing unit (30) is computer or industrial computer；Computer or
Industrial computer is analyzed process to infrared image spectrum as follows：
(C1) basic parameter of operating personnel's input bridge concrete structure to be detected in graphics processing unit (30), at image
Reason unit (30) sets up flawless master pattern according to basic parameter；
(C2) operating personnel are input into the heating location in step A, heating-up temperature or time into graphics processing unit (30), figure
As processing unit (30) will obtain standard IR image spectrum according to the information for receiving after master pattern simulation heating；
(C3) reality of the survey bridge concrete structure to be detected that graphics processing unit (30) exports image unit (20) is infrared
Image is composed to be composed with the standard IR image in step C2 and carries out color and compare；
(C4) heterochromia of the upper each position of infrared image spectrum is corresponded in bridge structure, heterochromia is bigger, represents the position
The defect for putting place's bridge structure is bigger, and heterochromia is less than given threshold, represents bridge structure zero defect at the position.
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| CN201610874102.5A CN106645288A (en) | 2016-09-30 | 2016-09-30 | Nondestructive test system for defects of bridge concrete structure and test method thereof |
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| CN201610874102.5A CN106645288A (en) | 2016-09-30 | 2016-09-30 | Nondestructive test system for defects of bridge concrete structure and test method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107085012A (en) * | 2017-06-22 | 2017-08-22 | 鲁东大学 | A kind of monitoring device for extent of steel corrosion in armored concrete |
| CN107505351A (en) * | 2017-09-07 | 2017-12-22 | 湖南联智智能科技有限公司 | A kind of prestress hole path pressure grouting plumpness detection method and system |
| CN108982571A (en) * | 2018-05-23 | 2018-12-11 | 徐州工程学院 | A kind of non-destructive testing armored concrete becomes rusty the method for swollen degree |
| CN109202926A (en) * | 2018-09-13 | 2019-01-15 | 武汉轻工大学 | Suspension cable type crack detection robot |
| CN109781740A (en) * | 2019-03-13 | 2019-05-21 | 水利部交通运输部国家能源局南京水利科学研究院 | Remote control checks the method and apparatus of concrete microcrack |
| CN110672822A (en) * | 2019-09-23 | 2020-01-10 | 郑州航空工业管理学院 | Nondestructive testing system for structural defects of bridge concrete |
| CN111060558A (en) * | 2020-01-02 | 2020-04-24 | 青岛国信海天中心建设有限公司 | Steel pipe concrete compactness detection system and method |
| CN112731555A (en) * | 2021-01-29 | 2021-04-30 | 上海化学工业区公共管廊有限公司 | Method for detecting accumulated water of closed steel column |
| CN113358698A (en) * | 2021-06-11 | 2021-09-07 | 中国计量大学 | Concrete filled steel tube void detection system and method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107085012A (en) * | 2017-06-22 | 2017-08-22 | 鲁东大学 | A kind of monitoring device for extent of steel corrosion in armored concrete |
| CN107505351A (en) * | 2017-09-07 | 2017-12-22 | 湖南联智智能科技有限公司 | A kind of prestress hole path pressure grouting plumpness detection method and system |
| CN108982571A (en) * | 2018-05-23 | 2018-12-11 | 徐州工程学院 | A kind of non-destructive testing armored concrete becomes rusty the method for swollen degree |
| CN109202926A (en) * | 2018-09-13 | 2019-01-15 | 武汉轻工大学 | Suspension cable type crack detection robot |
| CN109781740A (en) * | 2019-03-13 | 2019-05-21 | 水利部交通运输部国家能源局南京水利科学研究院 | Remote control checks the method and apparatus of concrete microcrack |
| CN110672822A (en) * | 2019-09-23 | 2020-01-10 | 郑州航空工业管理学院 | Nondestructive testing system for structural defects of bridge concrete |
| CN111060558A (en) * | 2020-01-02 | 2020-04-24 | 青岛国信海天中心建设有限公司 | Steel pipe concrete compactness detection system and method |
| CN112731555A (en) * | 2021-01-29 | 2021-04-30 | 上海化学工业区公共管廊有限公司 | Method for detecting accumulated water of closed steel column |
| CN113358698A (en) * | 2021-06-11 | 2021-09-07 | 中国计量大学 | Concrete filled steel tube void detection system and method |
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Application publication date: 20170510 |