CN201364143Y - Bridge moving displacement measuring device based on machine vision - Google Patents
Bridge moving displacement measuring device based on machine vision Download PDFInfo
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- CN201364143Y CN201364143Y CNU2008202410960U CN200820241096U CN201364143Y CN 201364143 Y CN201364143 Y CN 201364143Y CN U2008202410960 U CNU2008202410960 U CN U2008202410960U CN 200820241096 U CN200820241096 U CN 200820241096U CN 201364143 Y CN201364143 Y CN 201364143Y
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Abstract
The utility model provides a novel bridge moving displacement measuring device based on machine vision. By continuously sending laser beams to a target of a to-be-measured point which is arranged on a bridge by a laser source arranged on a bank, laser faculae generated on the target are shot and converted into digital image signals after continuous image shooting and A/D conversion acted by an integrated imaging unit similarly arranged on the bank behind the target of the to-be-measured point, the digital image signals are transmitted to a PC computer or a data storage card by means of a USB, and after target identification and calculation performed by the PC computer operating imaging processing software, moving displacement of the bridge can be obtained through system calibration before measurement. As the target and the integrated imaging unit are arranged on the bridge at the position of the to-be-measured point via the same machine, relative stationary is ensured between the target and the integrated imaging unit, thereby clear images can be shot and following-up analysis and processing of the images can be favored. Besides, system calibration is finished before measurement, thereby real displacement values represented by each pixel on a CCD can be obtained.
Description
Technical field
The utility model relates to a kind of moving displacement measuring device of bridge that is used for science of bridge building, both be applicable to that instant bridge moved displacement measurement, be applicable to the long-term monitoring in real time of amount of deflection of continuous bridge, continuous rigid frame bridge, cable-stayed bridge and the suspension bridge of large span again, belong to the science of bridge building building field, specifically relate to a kind of real-time monitoring device that is applicable to the moving displacement of science of bridge building.
Background technology
In the prior art, moving displacement measurement in the science of bridge building structure, total powerstation method, catoptron method and spirit-leveling instrument method and acceleration transducer method, GPS method and machine vision method are generally adopted in the monitoring of bridge vertical displacement, total powerstation method, catoptron method and spirit-leveling instrument method all are static measurements, can't realize dynamic, the Continuous Observation of bridge displacement, also can't realize the robotization processing of the moving displacement of bridge, can only be as a kind of means of bridge periodic monitoring, and exist in and increase the defective that error produces in the artificial participation link; And the acceleration transducer method is poor for low frequency static displacement identification result, must carry out integration twice to it for obtaining displacement, and precision is not high, can't be real-time yet; The GPS method adopts Global Positioning System (GPS), utilizes to receive the Navsat carrier phase to carry out the real-time phase difference be the RTK technology, and the displacement of The real time measure bridge exists that measuring accuracy is not high, shortcoming such as cost an arm and a leg.Machine vision metrology has merged optics, electronics, machinery, sensor, computing machine, Flame Image Process, the communication technology in one, utilize the moving displacement of method dynamic measurement bridge of graphical analysis, have precision height, real-time, noncontact, advantage such as steady operation for a long time.At present, the machine vision method in the principle of the moving displacement measurement of bridge is: utilize photoelectricity and image processing method to find the solution the moving displacement of bridge, the specific implementation method is to place target (pointolite) at place, bridge measured point, detector makes target imaging on the CCD photosensitive unit by the optics amplification system of looking in the distance on the coast, by system calibrating, detect the moving displacement of bridge at vertical and direction across bridge.System calibrating carried out before measuring, and promptly solved the actual displacement value of each pixel representative on the line array CCD.The shortcoming that this method exists is: because target (pointolite) and detector can reach hundreds of rice apart from far away, this just requires optical system must select long focal length lens or telescopic system for use in order to obtain clearly data image.Therefore the nearmis in Installation and Debugging and the measuring process is easy to produce bigger measuring error later through telephoto lens or the amplification of telescopic system high power, and this metering system not only involves great expense, and causes bigger measuring error easily.
Summary of the invention
The utility model provides a kind of novel bridge based on machine vision moving displacement measuring device, by being arranged on the bank lasing light emitter constantly to the target emission of lasering beam that is arranged on measured point on the bridge, on target, produce laser facula, carry out image taking and A/D conversion back continuously by the integration imaging unit that is arranged on target back in measured point on the bridge equally and form data image signal, be transferred on PC or the data storage card through the USB mode, PC by runs image processing software carries out identification of targets and computing again, system calibrating by before measuring obtains the moving displacement of bridge.Because target and integration imaging unit are arranged at place, measured point on the bridge by same facility, have guaranteed the relative static of target and integration imaging unit, thereby can shoot distinct image, are beneficial to the analysis and the processing of successive image.System calibrating carried out before measuring, and promptly solved the actual displacement value that CCD goes up each pixel representative.
The technical solution of the utility model is achieved in that
Mainly form based on the moving displacement measuring device of the bridge of machine vision by the PC h of lasing light emitter a, target b, erecting frame c, integration imaging unit and runs image processing software.The integration imaging unit pack contains optical lens d, industrial camera e, image pick-up card f, data storage card g, the front end of integration imaging unit is provided with one and carries out the optical lens d that optics amplifies, an industrial camera e who carries out opto-electronic conversion is set behind the optical lens d, industrial camera e is connected to the PC h or the data storage card g of runs image processing software by image pick-up card f.Target b is made of translucent, non-transmission, material that shock resistance is good.Be arranged on the bank lasing light emitter a constantly to the target b emission of lasering beam that is arranged on measured point on the bridge, laser beam a imaging on target b, and produce laser facula at the another side of target b, behind optical lens d amplification imaging, carrying out continuous acquisition by industrial camera e takes, the vision signal of gathering is at first carried out filtering through image pick-up card f, the A/D conversion becomes Digital Image Data output, Digital Image Data both can be input among the PC h by USB interface, the imaging point of laser beam on target b carried out the extraction and the identification of target signature by the corresponding digital image processing algorithm, and, finally obtain the moving shift value of bridge in real time according to coordinate demarcation carrying out related operation; Also Digital Image Data can be stored among the data storage card g, with PC h view data be taken out, calculate the moving shift value of bridge through measurement after a while, and add up accordingly, analyze, assessment etc.Because must guarantee can blur-free imaging at target b another side laser facula, and laser can not transmission target b, in case the CCD photosensitive unit is caused damage, should select translucent, non-transmission, material that shock resistance is good for use, the size of target b is selected according to the moving displacement actual conditions of bridge and is changed, the installation of target b should make the center of laser beam and target b as far as possible on same horizontal line, in order to avoid target b laser beam under with the bridge vibration condition departs from target b scope; The center of the optical lens d of integration imaging unit and the center of industrial camera e and target b should be on same horizontal line, and target b and integration imaging unit all are installed on the same erecting frame c, make them with vibrating with the identical width of cloth frequently, to guarantee the two no relative displacement.
Advantage of the present utility model:
1) can carry out two-dimensional measurement simultaneously, measure perpendicular bridge to the moving displacement of direction across bridge bridge;
2) with industrial camera with target is integrated is placed on the bridge floor, avoided use long focal length lens or optical telescope, not only reduced system cost but also improved measuring accuracy;
3) measuring accuracy height adopts high resolution CCD and digital image processing techniques, and measuring accuracy can reach 1% of measurement range;
4) measuring distance can reach infinity in theory.As long as LASER Light Source emitted laser bundle blur-free imaging in the target range of receiving just can accurately be measured moving displacement;
5) Hz-KHz is wide, and Hz-KHz can be determined according to the frame frequency of industrial camera.Select the high industrial camera of frame frequency can obtain wideer frequency response range;
6) can select and the replacing target according to the actual conditions of the moving displacement of bridge easily, be applicable to that various types of bridges move displacement measurement.
Description of drawings
Fig. 1 is the composition synoptic diagram of the utility model based on the moving displacement measuring device of bridge of machine vision.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is further specified, this embodiment is 400 meters prestressed concrete cable-stayed bridges of a main span.According to the bridge deformation of designing requirement among this embodiment size and bridge deformation form, lasing light emitter a is positioned on the bank on the position of bridge floor roadside 1m among this embodiment, and the transmitting range of lasing light emitter a is 250m; Target b and integration imaging unit are installed on the erecting frame c that is positioned at the main span span centre, and lasing light emitter a height and integration imaging cell height are positioned on the same horizontal line.Target b size is 500mm*100mm, demarcates the cell into 1mm*1mm, and target b is 600mm apart from optical lens d, the industrial camera e of integration imaging unit; The apolegamy focal length is the varifocal optical lens d of 5～50mm; Industrial camera e adopts the MV camera, MV industrial camera e adopts 1/3 " CCD; highest resolution is 752 * 480; maximum frame rate is 60fps, industrial camera e is inner integrated image pick-up card f, directly output digital image signal; carry out the computing of image by the image processing software on the upper PC h; identification of targets, finally calculate bridge vibration perpendicular bridge to direction across bridge on component, promptly perpendicular bridge to the direction across bridge both direction on moving displacement.
Claims (4)
1, the moving displacement measuring device of a kind of bridge based on machine vision, mainly by lasing light emitter (a), target (b), erecting frame (c), the PC of integration imaging unit and runs image processing software (h) is formed, it is characterized in that: the integration imaging unit pack contains optical lens (d), industrial camera (e), image pick-up card (f), data storage card (g), the front end of integration imaging unit is provided with one and carries out the optical lens (d) that optics amplifies, an industrial camera (e) of carrying out opto-electronic conversion is set behind the optical lens (d), industrial camera (e) is connected to the PC (h) or the data storage card (g) of runs image processing software by image pick-up card (f); Target (b) and integration imaging unit all are installed on the same erecting frame (c), and are arranged at measured point on the bridge; Lasing light emitter (a) is arranged on the bank.
2, the moving displacement measuring device of the bridge based on machine vision according to claim 1 is characterized in that: target (b) is selected translucent, non-transmission, material that shock resistance is good for use.
3, the moving displacement measuring device of the bridge based on machine vision according to claim 1, it is characterized in that: the installation of target (b) should make the center of laser beam and target (b) as far as possible on same horizontal line, in order to avoid target (b) laser beam under with the bridge vibration condition departs from target (b) scope.
4, the moving displacement measuring device of the bridge based on machine vision according to claim 1, it is characterized in that: the center of optical lens of integration imaging unit (d) and industrial camera (e) and the center of target (b) should be on same horizontal lines.
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2008202410960U CN201364143Y (en) | 2008-12-30 | 2008-12-30 | Bridge moving displacement measuring device based on machine vision |
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| CNU2008202410960U CN201364143Y (en) | 2008-12-30 | 2008-12-30 | Bridge moving displacement measuring device based on machine vision |
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| CN101819024A (en) * | 2010-03-22 | 2010-09-01 | 中南大学 | Machine vision-based two-dimensional displacement detection method |
| CN101943573A (en) * | 2010-07-15 | 2011-01-12 | 哈尔滨工程大学 | Helicopter rotary wing common conicity measuring device and method based on light spot size |
| CN102003942A (en) * | 2010-10-12 | 2011-04-06 | 北京林业大学 | Image-based method for detecting tree diameter |
| CN102706283A (en) * | 2012-02-27 | 2012-10-03 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Online real-time detecting method for dynamic displacement of contact system of electric railway |
| CN102798350A (en) * | 2012-07-10 | 2012-11-28 | 中联重科股份有限公司 | Method, device and system for measuring deflection of arm support |
| CN102944177A (en) * | 2012-11-15 | 2013-02-27 | 西安交通大学 | Method for calibrating and replacing laser or displacement sensor in long-term measurement system |
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| CN103940345A (en) * | 2014-04-11 | 2014-07-23 | 西安敏文电子科技有限公司 | Remote displacement measurement system and method |
| CN103994724A (en) * | 2014-05-13 | 2014-08-20 | 滕军 | Method for monitoring two-dimensional displacement and strain of structure based on digital image processing technology |
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| CN105067208A (en) * | 2015-08-14 | 2015-11-18 | 哈尔滨工业大学 | Multi-channel bridge flexibility monitoring system based on CCD and method |
| CN105115588A (en) * | 2015-08-24 | 2015-12-02 | 江西飞尚科技有限公司 | Laser range finding method for monitoring large bridge vibration |
| CN105333831A (en) * | 2014-08-15 | 2016-02-17 | 西安星展测控科技股份有限公司 | Laser imaging flexibility and displacement monitoring method |
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| CN106441108A (en) * | 2016-09-14 | 2017-02-22 | 苏州市建筑科学研究院集团股份有限公司 | Vision displacement measurement system and method |
| CN107228627A (en) * | 2017-05-09 | 2017-10-03 | 上海数久信息科技有限公司 | A kind of measuring system of bridge tunnel displacement structure |
| ES2684134R1 (en) * | 2017-03-24 | 2018-11-15 | Universidad De Burgos | SYSTEM AND PROCEDURE FOR THE MONITORING OF STRUCTURES |
| CN109596053A (en) * | 2019-01-14 | 2019-04-09 | 中山大学 | A method of measurement high-speed rail bridge vertically moves degree of disturbing |
| CN111649816A (en) * | 2020-05-28 | 2020-09-11 | 长安大学 | Structural vibration mode testing system and method based on digital image recognition |
| CN111721212A (en) * | 2020-07-22 | 2020-09-29 | 沈阳云仿致准科技股份有限公司 | Target device and method for displacement measurement based on image recognition |
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| CN117387491A (en) * | 2023-12-11 | 2024-01-12 | 南京理工大学 | Binocular vision marker positioning device and method suitable for bridge girder erection machine |
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2008
- 2008-12-30 CN CNU2008202410960U patent/CN201364143Y/en not_active Expired - Lifetime
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| CN102003942B (en) * | 2010-10-12 | 2012-01-25 | 北京林业大学 | Image-based method for detecting tree diameter |
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| CN105333831A (en) * | 2014-08-15 | 2016-02-17 | 西安星展测控科技股份有限公司 | Laser imaging flexibility and displacement monitoring method |
| CN105333831B (en) * | 2014-08-15 | 2018-05-11 | 星展测控科技股份有限公司 | Laser imaging amount of deflection and displacement monitoring method |
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| CN105115588A (en) * | 2015-08-24 | 2015-12-02 | 江西飞尚科技有限公司 | Laser range finding method for monitoring large bridge vibration |
| CN105387811A (en) * | 2015-10-21 | 2016-03-09 | 陕西省地质环境监测总站 | Photoelectric type landslide mass dynamic online monitoring all-in-one machine and monitoring method thereof |
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| CN106225708A (en) * | 2016-08-30 | 2016-12-14 | 北京航空航天大学 | A kind of generic video deflection metrology system insensitive to ambient light |
| CN106441108A (en) * | 2016-09-14 | 2017-02-22 | 苏州市建筑科学研究院集团股份有限公司 | Vision displacement measurement system and method |
| CN106441108B (en) * | 2016-09-14 | 2020-02-14 | 苏州市建筑科学研究院集团股份有限公司 | Visual displacement measurement system and measurement method thereof |
| CN106338335A (en) * | 2016-11-07 | 2017-01-18 | 西华大学 | Image based online sleeper vibration monitoring method |
| ES2684134R1 (en) * | 2017-03-24 | 2018-11-15 | Universidad De Burgos | SYSTEM AND PROCEDURE FOR THE MONITORING OF STRUCTURES |
| CN107228627A (en) * | 2017-05-09 | 2017-10-03 | 上海数久信息科技有限公司 | A kind of measuring system of bridge tunnel displacement structure |
| CN109596053B (en) * | 2019-01-14 | 2019-10-01 | 中山大学 | A method of measurement high-speed rail bridge vertically moves degree of disturbing |
| CN109596053A (en) * | 2019-01-14 | 2019-04-09 | 中山大学 | A method of measurement high-speed rail bridge vertically moves degree of disturbing |
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| CN111721212A (en) * | 2020-07-22 | 2020-09-29 | 沈阳云仿致准科技股份有限公司 | Target device and method for displacement measurement based on image recognition |
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| CN112378507A (en) * | 2020-11-05 | 2021-02-19 | 浙江大学 | Computer vision structure vibration monitoring method based on motion compensation |
| CN112378507B (en) * | 2020-11-05 | 2021-10-01 | 浙江大学 | Computer vision structure vibration monitoring method based on motion compensation |
| CN117387491A (en) * | 2023-12-11 | 2024-01-12 | 南京理工大学 | Binocular vision marker positioning device and method suitable for bridge girder erection machine |
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Owner name: GROUP CO., LTD., ZHONGTIE DAQIAO BUREAU Free format text: FORMER OWNER: CHINA ZHONGTIE MAJOR BRIDGE ENGINEERING CO., LTD. Effective date: 20150215 |
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Effective date of registration: 20150215 Address after: 103 No. 430034 Hubei Province in Qiaokou District of Wuhan city road construction Patentee after: China Zhongtie Major Bridge Engineering Group Co., Ltd. Patentee after: Group Co., Ltd., Zhongtie Daqiao Bureau Address before: 103 No. 430034 Hubei Province in Qiaokou District of Wuhan city road construction Patentee before: China Zhongtie Major Bridge Engineering Group Co., Ltd. Patentee before: China Zhongtie Major Bridge Engineering Co., Ltd. |
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Address after: No. 103 430000 Qiaokou District in Hubei province Wuhan city road construction Patentee after: BRIDGE SCIENCE AND TECHNOLOGY INSTITUTE CO., LTD., CHINA RAILWAY ENGINEERING GROUP Patentee after: Group Co., Ltd., Zhongtie Daqiao Bureau Address before: 103 No. 430034 Hubei Province in Qiaokou District of Wuhan city road construction Patentee before: China Zhongtie Major Bridge Engineering Group Co., Ltd. Patentee before: Group Co., Ltd., Zhongtie Daqiao Bureau |
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