CN103424082A - Non-contact type reinforcing steel bar deformation measurement device and measurement method thereof - Google Patents
Non-contact type reinforcing steel bar deformation measurement device and measurement method thereof Download PDFInfo
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- CN103424082A CN103424082A CN2013103249774A CN201310324977A CN103424082A CN 103424082 A CN103424082 A CN 103424082A CN 2013103249774 A CN2013103249774 A CN 2013103249774A CN 201310324977 A CN201310324977 A CN 201310324977A CN 103424082 A CN103424082 A CN 103424082A
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Abstract
The invention discloses a non-contact type reinforcing steel bar deformation measurement device and a measurement method thereof. The measurement method comprises on the basis of two image sensors of charge-coupled devices, photographing tensile conditions of reinforcing steel bars in real time and synchronously sending tension sizes to a computer, recording the measured value of every component in real time through the computer, and performing real-time computing processing through self-designed software to obtain the change conditions of the tensile length of the reinforcing steel bars and the length of the reinforcing steel bars along with the tension. The on-contact type reinforcing steel bar deformation measurement device is simple in structure, can achieve reinforcing steel bar deformation measurement in a non-contact mode, is high in measurement accuracy, wide in measurement range, safe in operation and convenient to operate, saves manpower, and has a wide application prospect.
Description
Technical field
The present invention relates to detection, the measuring technique of reinforcing bar, be specifically related to a kind of contactless reinforcing bar deformation measuring device and measuring method based on the double charge coupled apparatus.
Background technology
Along with the development of China's economic construction and the raising of living standards of the people, detection to existed building, on referred agenda, come gradually, no matter being the aspects such as prospecting, design, construction, use, existed building has defect, still be subject to the weather effect, chemical erosion causes that structure is aging, all can bring hidden dangers in project, reduce security and the permanance of structure.For whether security and the permanance of determining structure meets the demands, need to be detected and be identified engineering structure, its reliability is made to scientific evaluation, then keeped in repair and reinforced, to improve the security of engineering structure, extend its serviceable life.The reinforcing bar material mostly adopted for present buildings, wherein an important test item is exactly that steel bar mechanics performance detects.The detection of reinforcing bar actual strength often adopts the sampling test method.From scene intercepting reinforcing bar sample, send laboratory to do tension test, measure ultimate tensile strength (UTS), yield strength and the extensibility etc. of its reinforcing bar.Traditional measuring method (document " Hu Shuyang, Zhao Qida, He Shiya, Liao Bangquan. metal tube packaged fiber grating is for the measurement [J] of building iron strain. photoelectron. laser, 2004, 15 (6): 688-690 " be) to utilize the displacement transducer be connected on grip of testing machine to measure the whole deformation quantity of reinforcing bar, this method is because sensor directly contacts with the reinforcing bar be stretched, easily damage sensor, operational hazards, and it is affected by human factors greatly, precision is not high, automaticity is low, in drawing process, fixture and reinforcing bar easily produce slippage in addition, the integrally stretching length of measuring also has deviation.
Summary of the invention
For above-mentioned prior art, the technical problem to be solved in the present invention is: existing measuring method directly contacts with the reinforcing bar be stretched because of sensor, easily damage sensor, operational hazards, and it is affected by human factors greatly, precision is not high, and automaticity is low, in drawing process, fixture and reinforcing bar easily produce slippage in addition, and the integrally stretching length of measuring also has deviation.
In order to solve the problems of the technologies described above, the object of the present invention is to provide a kind of easy-to-operate, simple effectively, degree of accuracy is high, measurement range is large, applied widely measurement mechanism, the present invention adopts following technical scheme:
A kind of contactless reinforcing bar deformation measuring device, it is characterized in that, comprise the first optical screen, the second optical screen, the first charge-coupled image sensor, the second charge-coupled image sensor, the first capture card, the second capture card, the puller system that is connected with pressure transducer, light source and computing machine, described the first charge-coupled image sensor is over against the first optical screen, and the second charge-coupled image sensor is over against the second optical screen; The first charge-coupled image sensor and the second charge-coupled image sensor lay respectively at the two ends of reinforcing bar to be measured, described first capture card is connected to the first charge-coupled image sensor, the second capture card is connected to the second charge-coupled image sensor, described reinforcing bar to be measured stretches through puller system, the pulling force size reaches computing machine after the pressure transducer collection, and the tensile deformation amount reaches computing machine after the first capture card and the second capture card collection.
Measuring system adopts the transmission-type metering system, described light source adopts parallel light source, it is placed on the place ahead of the first optical screen, the second optical screen, the first charge-coupled image sensor and the second charge-coupled image sensor, light is walked around the first optical screen and the second optical screen, enters the first charge-coupled image sensor and the second charge-coupled image sensor.
Utilize the measuring method of above-mentioned contactless reinforcing bar deformation measuring device, it is characterized in that, it comprises the following steps:
1. pressure transducer is connected to puller system, and computing machine is connected with pressure transducer, the first capture card and the second capture card;
2. the first optical screen is fixed on the left end of reinforcing bar, the first optical screen produces displacement along with the stretching of reinforcing bar, the first charge-coupled image sensor does not contact reinforcing bar, the position of method dynamic acquisition the first optical screen by digital photography, and the first capture card gathers the displacement information that the first charge-coupled image sensor obtains;
3. the second optical screen is fixed on the right-hand member of reinforcing bar, the second optical screen produces displacement along with the stretching of reinforcing bar, the second charge-coupled image sensor does not contact reinforcing bar, the position of shielding by the method dynamic acquisition second of digital photography, and the second capture card gathers the displacement information that the second charge-coupled image sensor obtains;
4. two displacements subtract each other and obtain the relative displacement deviation, i.e. the amount of tension of reinforcing bar.
Compared with prior art, beneficial effect of the present invention shows:
One, noncontact need not install and measure scale or sensor on object being measured, only need operate on computers, and robotization, efficiency is high, and manual intervention is few;
Two, for required measurement, be unit length reinforcing bar deformation quantity, and in drawing process, the integral body of tested unit length reinforcing bar can be subjected to displacement, the present invention adopts initial point and the terminal of the respectively corresponding steel bar stretching of two charge-coupled image sensors front and back unit length, two diverse locations are measured simultaneously, more accurate than single charge-coupled image sensor measurement result, measurement range is also wider;
Three, by software control, calculate and to make to measure and experimental result can be integrated;
Four, digitizing, can Locale Holding and print measurement result, and prevention is faked, and it can also building database in addition, is inquired about;
Five, utilize a computer-controlled contactless reinforcing bar distortion measurement system, allow the user only need carry out on computers shirtsleeve operation, just can obtain than the more accurate measurement result of manual contact type measurement.
The accompanying drawing explanation
The one-piece construction schematic diagram that Fig. 1 is device of the present invention;
Fig. 2 is the tension variations that obtains by automatic test of device of the present invention and the graph of a relation of reinforcing bar deformation quantity.
Embodiment
Below in conjunction with the drawings and the specific embodiments, the invention will be further described.
A kind of contactless reinforcing bar deformation measuring device and measuring method comprise the following steps:
1. by the pressure transducer connection force-applying device, computing machine is connected with pressure transducer, the first capture card and the second capture card simultaneously;
2. the first optical screen is fixed on the left end of reinforcing bar, the first optical screen produces displacement along with the stretching of reinforcing bar, the first charge-coupled image sensor does not contact reinforcing bar, and by the position of method dynamic acquisition the first optical screen of photography, the first capture card gathers the displacement information that the first charge-coupled image sensor obtains;
3. the second optical screen is fixed on the right-hand member of reinforcing bar, the second optical screen produces displacement along with the stretching of reinforcing bar, the second charge-coupled image sensor does not contact reinforcing bar, the position of shielding by the method dynamic acquisition second of photography, and the second capture card gathers the displacement information that the second charge-coupled image sensor obtains;
4. two displacements subtract each other and obtain the relative displacement deviation, that is to say the amount of tension of reinforcing bar.
Shown in Fig. 1, after system connects, start computer and software, adjust the first charge-coupled image sensor and the second charge-coupled image sensor and other each several parts, the normal operation of assurance system.Puller system is sent to pulling force data on the computing machine of installation data acquisition software and record, simultaneously the first charge-coupled image sensor and the second charge-coupled image sensor dynamically recording are taken the position of the first optical screen and the second optical screen, and the first capture card and the second capture card be their image informations of obtaining of Real-time Collection be sent on computing machine and record by data by communication interface respectively.In order to guarantee gathered reinforcing bar deformation data and the correspondence of pulling force data, computing machine must gather the data from different device simultaneously, and record simultaneously, draws real-time curve.
On the computer software of design, operate, can obtain the relation of deformation quantity, reinforcing bar deformation quantity and the pulling force of reinforcing bar, described computer software, size that can real time record steel bar stretching length, by gathering the data of the first charge-coupled image sensor, the second charge-coupled device and pressure transducer, the relation curve of real-time depiction pulling force and reinforcing bar deformation quantity, preserve image and data, and building database, can realize inquiring about printable function.
Data acquisition software adopts the exploitation of Visual C++ program language, specific code can be write according to the communications protocol of each instrument, and it can be realized, and oolhiu interactive user operation interface, measurement profile screen are drawn, the measurement curve exports the management of printer printing, measurement data to and inquires about and also can do further exploitation to software as required.The tension variations that Fig. 2 obtains by automatic test for this device and the graph of a relation of reinforcing bar deformation quantity.
Claims (3)
1. a contactless reinforcing bar deformation measuring device, it is characterized in that, comprise the first optical screen, the second optical screen, the first charge-coupled image sensor, the second charge-coupled image sensor, the first capture card, the second capture card, the puller system that is connected with pressure transducer, light source and computing machine, described the first charge-coupled image sensor is over against the first optical screen, and the second charge-coupled image sensor is over against the second optical screen; The first charge-coupled image sensor and the second charge-coupled image sensor lay respectively at the two ends of reinforcing bar to be measured, described first capture card is connected to the first charge-coupled image sensor, the second capture card is connected to the second charge-coupled image sensor, described reinforcing bar to be measured stretches through puller system, the pulling force size reaches computing machine after the pressure transducer collection, and the tensile deformation amount reaches computing machine after the first capture card and the second capture card collection.
2. contactless reinforcing bar deformation measuring device according to claim 1, it is characterized in that, measuring system adopts the transmission-type metering system, described light source is parallel light source, it is placed on the place ahead of the first optical screen, the second optical screen, the first charge-coupled image sensor and the second charge-coupled image sensor, light is walked around the first optical screen and the second optical screen, enters the first charge-coupled image sensor and the second charge-coupled image sensor.
3. contactless reinforcing bar deformation measuring device according to claim 1 is measured the measuring method of reinforcing bar deformation, it is characterized in that, comprises the following steps:
1. pressure transducer is connected to puller system, and computing machine is connected with pressure transducer, the first capture card and the second capture card;
2. the first optical screen is fixed on the left end of reinforcing bar, the first optical screen produces displacement along with the stretching of reinforcing bar, the first charge-coupled image sensor does not contact reinforcing bar, the position of method dynamic acquisition the first optical screen by digital photography, and the first capture card gathers the displacement information that the first charge-coupled image sensor obtains;
3. the second optical screen is fixed on the right-hand member of reinforcing bar, the second optical screen produces displacement along with the stretching of reinforcing bar, the second charge-coupled image sensor does not contact reinforcing bar, the position of shielding by the method dynamic acquisition second of digital photography, and the second capture card gathers the displacement information that the second charge-coupled image sensor obtains;
4. two displacements subtract each other and obtain the relative displacement deviation, i.e. the amount of tension of reinforcing bar.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104537191A (en) * | 2015-01-21 | 2015-04-22 | 中国电建集团华东勘测设计研究院有限公司 | Drawing method for three-dimensional rebar model schematic diagram |
| CN107631705A (en) * | 2017-08-28 | 2018-01-26 | 山东大学 | A kind of strand tapered anchorage reinforcing bar amount of recovery test device and method |
| CN109632481A (en) * | 2018-12-19 | 2019-04-16 | 安徽省骏腾工程试验检测有限公司 | A kind of detection system and its operating method of steel bar stretching deformation |
| CN111336929A (en) * | 2020-03-25 | 2020-06-26 | 重庆三峡学院 | Measuring device is used in civil engineering construction |
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| CN1693874A (en) * | 2005-05-27 | 2005-11-09 | 苏州大学 | High precision measuring method for stretching displacement |
| CN101182989A (en) * | 2007-06-19 | 2008-05-21 | 昆明理工大学 | Double microscopic digital speckle strain measurement method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104537191A (en) * | 2015-01-21 | 2015-04-22 | 中国电建集团华东勘测设计研究院有限公司 | Drawing method for three-dimensional rebar model schematic diagram |
| CN107631705A (en) * | 2017-08-28 | 2018-01-26 | 山东大学 | A kind of strand tapered anchorage reinforcing bar amount of recovery test device and method |
| CN107631705B (en) * | 2017-08-28 | 2019-12-24 | 山东大学 | Device and method for testing steel bar retraction amount of clip type anchorage device |
| CN109632481A (en) * | 2018-12-19 | 2019-04-16 | 安徽省骏腾工程试验检测有限公司 | A kind of detection system and its operating method of steel bar stretching deformation |
| CN111336929A (en) * | 2020-03-25 | 2020-06-26 | 重庆三峡学院 | Measuring device is used in civil engineering construction |
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