CN2935138Y - Concrete test piece crack detecting device - Google Patents
Concrete test piece crack detecting device Download PDFInfo
- Publication number
- CN2935138Y CN2935138Y CN 200620096879 CN200620096879U CN2935138Y CN 2935138 Y CN2935138 Y CN 2935138Y CN 200620096879 CN200620096879 CN 200620096879 CN 200620096879 U CN200620096879 U CN 200620096879U CN 2935138 Y CN2935138 Y CN 2935138Y
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- China
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- screw mandrel
- crack
- concrete sample
- concrete
- movable platform
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Abstract
The utility model is a concrete test piece crack detection device, comprising a crack image collecting device and a computer installed with image processing program. The crack image collecting device consists of an industrial camera (6) and a scanning mechanism, the industrial camera is fixed on a movable platform (5); the scanning mechanism consists of a motor (1), a speed reducer box (2) , a slide rob (4) , a screw mandrel (3) and a movable platform. The motor is connected with the input shaft of the speed reducer box, the output shaft of the speed reducer box is connected with the screw mandrel, the slide rod and the screw mandrel are connected with the movable platform and arranged in parallel with the central axis of the concrete test piece (8), and the slide rod and the screw mandrel are supported by a bearing seat (7). The utility model is capable of analyzing the width, length and distribution of the concrete test piece, and the non-uniformity of locally applied forces on the test piece, which is beneficial to disclose the relationship among the force bearing condition of the concrete, crack size and distribution, and environment, and has applicable value in preventing the generation and expansion of concrete cracks.
Description
Technical field
The utility model relates to the equipment of concrete sample Crack Detection device, specifically is the Crack Detection device about constraint adjustable single axle temperature-pressure tester.
Background technology
Constraint adjustable single axle temperature-pressure tester is a kind ofly to study the early stage hydration characteristics of concrete, stress development, deformation modulus and the equipment of characteristic such as creep.Testing machine applies certain pressure and constraint to concrete sample or changes the temperature of test specimen, and the concrete sample surface all will produce certain deformation.This distortion meeting shows by the crack on surface.
At present, the means in domestic detection concrete sample crack mainly are the manual measurement methods, measure length, the orientation distance in every crack as adopting steel tape; Adopt the scale magnifier to measure fracture width; Adopt approximate shape and the tendency of describing the crack of ocular estimate.The concrete test cycle is long, and the crack is more, and this manual method inefficiency, labour intensity height, detection speed is slow, resultant error is big.Although minority university and company are carrying out distress in concrete photography and automatic identification technology research, modern digital image processing is applied to the technical scheme of distress in concrete identification, does not possess this Crack Detection function but retrain adjustable single axle temperature-pressure tester at present both at home and abroad.
Summary of the invention
Technical problem to be solved in the utility model is: a kind of concrete sample Crack Detection device is provided, and this equipment can fast detecting and is reflected concrete crack in the testing machine in real time, exactly.
The technical scheme that its technical matters that solves the utility model adopts is: comprise crack image collecting device and the computer that has imgae processing software, the crack image collecting device is made up of industrial camera and scanning mechanism, and industrial camera is fixed on the movable platform; Scanning mechanism is made up of motor, reducer casing, slide bar, screw mandrel and movable platform, motor links to each other with the input shaft of reducer casing, the output shaft of reducer casing links to each other with screw mandrel, slide bar links to each other with movable platform with screw mandrel, and be arranged in parallel with the axis of concrete sample, slide bar, screw mandrel are supported by supporting base, and supporting base and concrete sample are installed on the base.
The utility model can be analyzed width, length and the distribution in concrete sample crack, and the unevenness of test specimen local pressure is analyzed.This will help to disclose the relation between concrete stressing conditions, crack size and distribution and the environment three, have actual application value on to the generation that prevents distress in concrete and expansion.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the cross sectional representation of movable platform 5 among Fig. 1.
Embodiment
The utility model will be further described below in conjunction with accompanying drawing.
The utility model provides a kind of concrete sample Crack Detection device, its structure as shown in Figure 1 to Figure 3: comprise the crack image collecting device and have the computer of imgae processing software, the crack image collecting device is made up of industrial camera 6 and scanning mechanism.Industrial camera 6 is fixed on the movable platform 5.Scanning mechanism is made up of motor 1, reducer casing 2, screw mandrel 3, slide bar 4 and movable platform 5, motor 1 links to each other with the input shaft of reducer casing 2, the output shaft of reducer casing 2 links to each other with screw mandrel 3, screw mandrel 3 links to each other with movable platform 5 with slide bar 4, and be arranged in parallel with the axis of concrete sample 8, slide bar 4, screw mandrel 3 are by supporting base 7 supportings, and supporting base 7 and concrete sample 8 are installed on the base 11.Base 11 links to each other with ground.
Above-mentioned crack image collecting device is not less than 0.01um to the sweep length and the precision in the crack of concrete sample.Motor 1 can adopt stepper motor.The cross section of screw mandrel 3, slide bar 4 is circle, and its diameter is 0.5cm～1cm, and length is 1～2m.
Shown in Fig. 2 and 3: slide bar 4 and screw mandrel 3 pass the guide hole 9 and the guide hole 10 of movable platform 5 respectively.Wherein slide bar 4 can be free movable in guide hole 9, and guide hole 10 inside and screw mandrel 3 are by threaded engagement.By rotary screw rod 3, movable platform 5 can be moved on screw mandrel 3 and slide bar 4, and travel direction is relevant with the rotation direction of screw mandrel 3.Screw mandrel 3 links to each other with the output shaft of reducer casing 2, and motor 1 links to each other with the input shaft of reducer casing 2.Motor 1 drives screw mandrel 3 after slowing down by reducer casing 2, can realize that movable platform 5 does linear motion, and screw mandrel 3 can rotate freely in supporting base 7.
The direction of scanning of industrial camera 6 is parallel with concrete sample 8 axis.Under the driving of motor, movable platform 5 ceaselessly moves back and forth above concrete sample 8, and industrial camera is ceaselessly scanned the outside surface of concrete sample 8 back and forth.
The data of scanning are handled by computer, for example by the desk-top or notebook computer processing that image pick-up card is installed and image processing software is installed.The computer expert crosses the image acquisition card, the view data on concrete sample 8 surfaces that industrial camera 6 is collected is saved in the computer hard disc, image processing software scans according to the average gray of the every width of cloth image gray scale to image, the point that is lower than average gray is a bright spot, and the point that is higher than average gray is a dim spot.After handling in this way, original image has become the easy-to-handle black white image of computing machine.Because the crack shows as a continuous dim spot on image.Therefore computer further scans dim spot, therefrom finds out continuous dim spot, can obtain the statistical indicator of length of width in the crack of entire image.As mean breadth and length, the length of minimum and maximum width etc. are estimated the index of distress in concrete.
Claims (5)
1. concrete sample Crack Detection device, it is characterized in that: comprise the crack image collecting device and have the computer of handling imgae processing software, the crack image collecting device is made up of industrial camera (6) and scanning mechanism, and industrial camera (6) is fixed on the movable platform (5); Scanning mechanism is made up of motor (1), reducer casing (2), screw mandrel (3), slide bar (4) and movable platform (5), motor (1) links to each other with the input shaft of reducer casing (2), the output shaft of reducer casing (2) links to each other with screw mandrel (3), slide bar (4) links to each other with movable platform (5) with screw mandrel (3), and be arranged in parallel with the axis of concrete sample (8), slide bar (4), screw mandrel (3) are by supporting base (7) supporting, and supporting base (7) and concrete sample (8) are installed on the base (11).
2. concrete sample Crack Detection device according to claim 1 is characterized in that: the crack image collecting device is not less than 0.01um to the sweep length and the precision in the crack of concrete sample (8).
3. concrete sample Crack Detection device according to claim 1 is characterized in that: the cross section of slide bar (4) is for circular, and its diameter is 0.5cm～1cm, and length is 1～2m.
4. concrete sample Crack Detection device according to claim 1 is characterized in that: the cross section of screw mandrel (3) is for circular, and its diameter is 0.5cm～1cm, and length is 1～2m.
5. concrete sample Crack Detection device according to claim 1 is characterized in that: motor (1) is a stepper motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620096879 CN2935138Y (en) | 2006-05-25 | 2006-05-25 | Concrete test piece crack detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620096879 CN2935138Y (en) | 2006-05-25 | 2006-05-25 | Concrete test piece crack detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2935138Y true CN2935138Y (en) | 2007-08-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 200620096879 Expired - Fee Related CN2935138Y (en) | 2006-05-25 | 2006-05-25 | Concrete test piece crack detecting device |
Country Status (1)
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| CN (1) | CN2935138Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102243063A (en) * | 2011-04-14 | 2011-11-16 | 华中科技大学 | Concrete bridge bottom crack detecting device |
| CN102607431A (en) * | 2012-03-30 | 2012-07-25 | 北京智博联科技有限公司 | High-precision continuous crack width scanner |
| CN103808368A (en) * | 2014-03-10 | 2014-05-21 | 广州展亚土木工程技术有限公司 | Portable reinforced concrete detector |
| CN106645171A (en) * | 2016-12-22 | 2017-05-10 | 江苏工程职业技术学院 | Method for detecting concrete cracks by using wall-climbing robot |
| CN108195290A (en) * | 2017-12-29 | 2018-06-22 | 上海建工集团股份有限公司 | A kind of crack measuring apparatus and measuring method based on image procossing |
| CN112611754A (en) * | 2020-10-26 | 2021-04-06 | 中国水利水电第三工程局有限公司 | Method for evaluating appearance quality of fair-faced concrete |
-
2006
- 2006-05-25 CN CN 200620096879 patent/CN2935138Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102243063A (en) * | 2011-04-14 | 2011-11-16 | 华中科技大学 | Concrete bridge bottom crack detecting device |
| CN102607431A (en) * | 2012-03-30 | 2012-07-25 | 北京智博联科技有限公司 | High-precision continuous crack width scanner |
| CN102607431B (en) * | 2012-03-30 | 2014-06-04 | 北京智博联科技有限公司 | High-precision continuous crack width scanner |
| CN103808368A (en) * | 2014-03-10 | 2014-05-21 | 广州展亚土木工程技术有限公司 | Portable reinforced concrete detector |
| CN106645171A (en) * | 2016-12-22 | 2017-05-10 | 江苏工程职业技术学院 | Method for detecting concrete cracks by using wall-climbing robot |
| CN108195290A (en) * | 2017-12-29 | 2018-06-22 | 上海建工集团股份有限公司 | A kind of crack measuring apparatus and measuring method based on image procossing |
| CN112611754A (en) * | 2020-10-26 | 2021-04-06 | 中国水利水电第三工程局有限公司 | Method for evaluating appearance quality of fair-faced concrete |
| CN112611754B (en) * | 2020-10-26 | 2023-12-29 | 中国水利水电第三工程局有限公司 | Method for evaluating appearance quality of bare concrete |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070815 Termination date: 20120525 |