CN101021413A - Automatic measuring system for vehicle external profile - Google Patents
Automatic measuring system for vehicle external profile Download PDFInfo
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- CN101021413A CN101021413A CN 200610023866 CN200610023866A CN101021413A CN 101021413 A CN101021413 A CN 101021413A CN 200610023866 CN200610023866 CN 200610023866 CN 200610023866 A CN200610023866 A CN 200610023866A CN 101021413 A CN101021413 A CN 101021413A
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- external profile
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Abstract
The invention relates to measurement of motorcar outline dimension, especially an automatic measuring system. The system is composed of a PC with measuring and controlling functions, tow digital cameras, an output unit and some correlation tie cables. During measuring, PC controls digital cameras to get front and side images of the motorcar, identifies its outline from images automatically and achieves its length, width and height by non-linear mapping. Images must be adjusted before measuring. The invention solves the problems of lower working efficiency and precision in existed motorcar outline measuring technique, which has strong system function and supports information system.
Description
Technical field:
The present invention relates to the measurement of car conour size, particularly a kind of automatic measuring system for vehicle external profile.
Background technology:
Along with developing of automobile industry, and automobile daily production, the life in universal day by day, adopt under the conventional art regular detection, safeguard and caused huge working load to relevant departments to a large amount of vehicles, to efficient, accurately, the vehicle detection of robotization, measuring technique demand be urgent day by day.This type of development of technologies, utilization will be saved a large amount of human resources, shorten and measure regularly detection, maintenance time, improve the work efficiency and the work quality of relevant departments, finally bring great technical economic benefit.
Theoretical circles and industry member are particularly also done a lot to profile identification detection to vehicle detection.People such as Tao Qingping are (microelectronics and computing machine 1999 in " based on the car conour recognition system and the application thereof of fuzzy neural network " literary composition, 16) the utilization fuzzy neural network has been carried out theoretic discussion and research to the contour of the vehicle recognition technology, but does not relate to specific implementation.Therefore, existing metering system remains the hand dipping mode that rests on, and like this, not only inefficiency, and precision is not high.
Summary of the invention:
The purpose of this invention is to provide a kind of automatic measuring system for vehicle external profile, the existing car conour size measurement technique inefficiency of solution, the technical matters that measuring accuracy is not high, systemic-function is powerful, and the support of infosystem is provided.
For solving the problems of the technologies described above, technical scheme of the present invention is:
A kind of automatic measuring system for vehicle external profile is characterized in that: this system forms by having PC, two digital cameras, output device and relevant connection cables of measuring with control function; During detection, this PC is controlled the image that digital camera obtains automobile front and side respectively, automatically from image, identify the profile of automobile then, obtain length, width and the height dimension of automobile, and the result is shown by output device by the computing method of Nonlinear Mapping; Before the detection, must carry out image calibration.
This image calibration comprises side camera position calibration and the calibration of front camera position; The side calibration step is:
1. place video camera, determine datum line;
2. display image;
3. access and proofread and correct the interface;
4. adjust flag-rod (this flag-rod is in the software the inside, and it is to adjust, and purpose is to improve measuring accuracy) about the figure the inside
5. proofread and correct;
Positive calibration steps is:
1. place video camera, determine datum line;
2. display image;
3. access and proofread and correct the interface;
4. adjust flag-rod (this flag-rod is in the software the inside, and it is to adjust up and down in the figure the inside, and purpose is to improve measuring accuracy)
5. proofread and correct.
By the computing method of Nonlinear Mapping obtain length, width and the height dimension of automobile and deposit in the database the concerned countries standard relatively, whether exceed standard with the contour dimension of judging detected vehicle, and deposit all correlated results in Database Systems, be used for inquiry, show, output.
The result who records compares with national standard if exceed standard, and then points out by sound and light alarm.
This transmission control element can be the Network Transmission controller, also can be general peripheral hardware transmission control element.
This general peripheral hardware transmission control element is USB controller or 1394 controllers.
This output device is display and/or printer.
Compared with prior art, technique effect of the present invention is:
1, the present invention relies on computer system, can realize the automatic identification and the measurement of vehicle external profile shape and size (length, width and height).
2, the present invention has been owing to adopted the computing method of image pre-calibration technology and Nonlinear Mapping, therefore, vehicle external profile dimensional measurement precision height, measuring accuracy can improve more than 5 times than traditional measurement mode, the accuracy requirement that is up to state standards.
Description of drawings:
Fig. 1 is a system architecture diagram of the present invention.
Fig. 2 is a testing process synoptic diagram of the present invention.
Among the figure:
The 1-PC machine;
The 11-transmission control element;
12-camera calibration module; The 13-image capture module;
14-gabarit identification module; 15-size computing module;
16-relevant national standard maintenance module; 17-is discrimination module relatively;
18-detection record management maintenance module; The 19-Database Systems;
21,22-digital camera;
The 31-display; The 32-printer.
Embodiment:
The invention provides a kind of automatic measuring system for vehicle external profile that is applied to vehicle inspection and test station.
1, system forms
System is made up of measurement and Control Software, a PC 1 (having transmission control element), two digital cameras 21,22, output device (display 31 and/or printer 32) and relevant connection cables etc., wherein transmission control element 11 is according to different digital camera interfaces, it can be the Network Transmission controller, also can be general peripheral hardware transmission control element, as USB controller or 1394 controllers.Total system constitutes as shown in Figure 1.
System can control the image that digital camera obtains automobile front and side respectively by the software in the PC, automatically from image, identify the profile of automobile then, obtain length, width and the height equidimension of automobile by the computing method of Nonlinear Mapping, whether the contour dimension that can judge detected vehicle with the comparison of concerned countries standard exceeds standard, and deposit all correlated results in Database Systems, be used for inquiry, demonstration, output etc.Wherein, measure with Control Software and be its function of realization, by camera calibration module 12, image capture module 13, gabarit identification module 14, size computing module 15, relevant national standard maintenance module 16, comparison discrimination module 17, compositions such as detection record management maintenance module 18 and Database Systems 19.Mutual relationship between each module of measurement and Control Software can be referring to Fig. 1.
2, the feature that possesses of system
The principal character that this automatic measuring system for vehicle external profile possessed is as follows.
(1) image acquisition and recognition function
Measure with Control Software and can control digital camera, directly obtain the digital picture of vehicle by the transmission control element of PC main frame.After image carried out intelligentized discriminance analysis, can detect the appearance profile of automobile automatically.The image of digital camera 1 is obtained the profile in automobile front, obtain the profile of automobile side by identification the image of digital camera 2.
(2) digital camera calibration function
In measurement and Control Software, have corresponding digital camera calibration module, cooperate the adjustment of digital camera angle, focal length, aperture can finish the calibration of digital camera.By software calibration, can make the measuring accuracy of system can improve more than 5 times.
System surpasses 26cm to the total measuring error of automobile width before calibration, and the measuring error total to the automobile height surpasses 28cm, and the measuring error total to motor vehicle length surpasses 85cm.System is no more than 5cm to the total measuring error of automobile width after the calibration, and measuring accuracy is better than 2%; System is no more than 8cm to the total measuring error of automobile height, and measuring accuracy is better than 3%; System is no more than 20cm to the total measuring error of motor vehicle length, when motor vehicle length during greater than 15cm measuring accuracy be better than 1.5%, measuring accuracy is better than 2.5% when motor vehicle length is between 8m-15m, measuring accuracy is better than 4% when motor vehicle length is between 5m-8m, when motor vehicle length during less than 5m measuring accuracy be better than 5%.
This image calibration comprises side camera position calibration and the calibration of front camera position; The side calibration step is:
1. place video camera, determine datum line;
2. display image;
3. access and proofread and correct the interface;
4. adjust flag-rod; (this flag-rod is in the software the inside, and it is to adjust about the figure the inside, and purpose is to improve measuring accuracy)
5. proofread and correct;
Positive calibration steps is:
1. place video camera, determine datum line;
2. display image;
3. access and proofread and correct the interface;
4. adjust flag-rod; (this flag-rod is in the software the inside, and it is to adjust about the figure the inside, and purpose is to improve measuring accuracy)
5. proofread and correct;
(3) Nonlinear Mapping between image pixel and physical size is calculated the vehicle external profile size
Distortion can appear in the image that collects from digital camera, therefore, the visual range of digital camera has been carried out distortion proofreaied and correct.Pixel in the image and actual object position are set up Nonlinear Mapping, improve the precision of measuring.By Nonlinear Mapping, the measuring accuracy of system can be improved more than 2 times.
Before mapping, the measuring error of automobile width is surpassed 5cm, the measuring error of automobile height is surpassed 5cm, the error of motor vehicle length is surpassed 15cm because of what anamorphose produced.Because of anamorphose is no more than 2cm to the measuring error of automobile width, the measuring error of automobile height is no more than 2cm after the mapping, the error of motor vehicle length is no more than 5cm.
(4) the manual setting automobile is measured the function of appearance profile
When receiving that interference or other reason cause the car conour profile measurement inaccurate, can use the manual adjustment function that provides in the software to adjust, to extract correct automobile profile, improve the precision of measuring.
Whether (5) differentiate vehicle contour dimension according to national standard exceeds standard
The system integration regulation of relevant national standard to vehicle contour dimension, with the vehicle length of actual measurement, width and height and national standard relatively, judge automatically whether it exceeds standard.
(6) preservation of measurement result and output function
After measurement is finished, can be with the contour dimensions of measuring such as vehicle length, width and height, the result whether every size exceeds standard, information such as the license plate number of vehicle, car owner, affiliated unit, manufacturing plant, detection unit, detection person are together with two width of cloth vehicle images, the one logical detection record database of taking that deposits in.Under the support of Database Systems, detection record management maintenance module can conveniently realize interpolation, inquiry, deletion and demonstration and the output of detection information.
3, the flow process (see figure 2) of Jian Ceing
(1) obtains the image of digital camera and digital camera simultaneously by the button control transmission control element;
(2) measured automobiles gabarit;
(3) according to vehicle external profile, carry out Nonlinear Mapping and calculate, obtain the three-dimensional dimension of the length of vehicle;
(4) select the tested vehicle type, obtain the contour dimension of such vehicle of concerned countries standard code;
(5) the prompting warning that exceeds standard and differentiate and be correlated with;
(6) information such as detected vehicle of input and detection unit;
(7) preserve related data;
(8) show, print correlated results.
Repeat above-mentioned steps, can carry out the detection of next car.In addition, the management that data base management system (DBMS) is carried out detection record can be entered at any time in the testing process, also help can be obtained at any time.
Claims (7)
1, a kind of automatic measuring system for vehicle external profile is characterized in that: this system forms by having PC (1), two digital cameras (21), (22), output device (31), (32) and the relevant connection cable measured with control function; During detection, this PC (1) is controlled digital camera (21), (22) obtain the image of automobile front and side respectively, automatically from image, identify the profile of automobile then, obtain length, width and the height dimension of automobile by the computing method of Nonlinear Mapping, and the result is shown by output device (31), (32); Before the detection, must carry out image calibration.
2, automatic measuring system for vehicle external profile according to claim 1 is characterized in that: this image calibration comprises side camera position calibration and the calibration of front camera position; The side calibration step is:
1. place video camera, determine datum line;
2. display image;
3. access and proofread and correct the interface;
4. adjust flag-rod;
5. proofread and correct;
Positive calibration steps is:
1. place video camera, determine datum line;
2. display image;
3. access and proofread and correct the interface;
4. adjust flag-rod;
5. proofread and correct.
3, automatic measuring system for vehicle external profile according to claim 1 and 2, it is characterized in that: by the computing method of Nonlinear Mapping obtain length, width and the height dimension of automobile and deposit in the database the concerned countries standard relatively, whether exceed standard with the contour dimension of judging detected vehicle, and deposit all correlated results in Database Systems, be used for inquiry, show, output.
4, automatic measuring system for vehicle external profile according to claim 3 is characterized in that: the result who records compares with national standard if exceed standard, and then points out by sound and light alarm.
5, automatic measuring system for vehicle external profile according to claim 1 and 2 is characterized in that: this transmission control element can be the Network Transmission controller, also can be general peripheral hardware transmission control element.
6, automatic measuring system for vehicle external profile according to claim 5 is characterized in that: this general peripheral hardware transmission control element is USB controller or 1394 controllers.
7, automatic measuring system for vehicle external profile according to claim 1 and 2 is characterized in that: this output device is display and/or printer.
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| CN 200610023866 CN101021413A (en) | 2006-02-14 | 2006-02-14 | Automatic measuring system for vehicle external profile |
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| CN 200610023866 CN101021413A (en) | 2006-02-14 | 2006-02-14 | Automatic measuring system for vehicle external profile |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102116610A (en) * | 2010-11-29 | 2011-07-06 | 科达斯特恩(常州)汽车塑件系统有限公司 | Automatic on-line detection method and device for size of automobile parts based on machine vision |
| CN101685005B (en) * | 2008-09-23 | 2011-08-10 | 廊坊市威达科技发展有限公司 | Machine for measuring outline dimension of vehicle |
| CN102044155B (en) * | 2009-10-20 | 2012-10-17 | 西安费斯达自动化工程有限公司 | Vehicle configuration dimension image detection and analysis device based on field programmable gate array (FPGA) |
| CN102887155A (en) * | 2011-07-22 | 2013-01-23 | 天津思博科科技发展有限公司 | Freight train transfinite computer vision inspection system |
| CN104457576A (en) * | 2014-12-18 | 2015-03-25 | 成都主导软件技术有限公司 | Method for object size re-checking |
| CN104931023A (en) * | 2015-05-28 | 2015-09-23 | 中国核电工程有限公司 | Photogrammetric method of cooling tower outlet fog plume |
| CN105157608A (en) * | 2015-08-31 | 2015-12-16 | 浙江大华技术股份有限公司 | Detection method, apparatus, and system of oversized vehicle |
| CN106705908A (en) * | 2016-12-12 | 2017-05-24 | 广西壮族自治区计量检测研究院 | Calibration device for vehicle overall dimension measuring instrument |
| CN107999402A (en) * | 2017-11-28 | 2018-05-08 | 商丘星林电子产业有限公司 | Tile-type product detection device |
| CN110360947A (en) * | 2019-06-24 | 2019-10-22 | 广州市奥特创通测控技术有限公司 | A kind of vehicle's contour measurement method based on vector image measurement |
| CN110660226A (en) * | 2019-10-30 | 2020-01-07 | 浙江大华技术股份有限公司 | Method, system and equipment for detecting vehicle safety standard and storage device |
| US10681257B2 (en) | 2015-08-26 | 2020-06-09 | Zhejiang Dahua Technology Co., Ltd. | Methods and systems for traffic monitoring |
| CN112268548A (en) * | 2020-12-14 | 2021-01-26 | 成都飞机工业（集团）有限责任公司 | Airplane local appearance measuring method based on binocular vision |
-
2006
- 2006-02-14 CN CN 200610023866 patent/CN101021413A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685005B (en) * | 2008-09-23 | 2011-08-10 | 廊坊市威达科技发展有限公司 | Machine for measuring outline dimension of vehicle |
| CN102044155B (en) * | 2009-10-20 | 2012-10-17 | 西安费斯达自动化工程有限公司 | Vehicle configuration dimension image detection and analysis device based on field programmable gate array (FPGA) |
| CN102116610B (en) * | 2010-11-29 | 2012-10-17 | 科达斯特恩(常州)汽车塑件系统有限公司 | Automatic on-line detection method and device for size of automobile parts based on machine vision |
| CN102116610A (en) * | 2010-11-29 | 2011-07-06 | 科达斯特恩(常州)汽车塑件系统有限公司 | Automatic on-line detection method and device for size of automobile parts based on machine vision |
| CN102887155A (en) * | 2011-07-22 | 2013-01-23 | 天津思博科科技发展有限公司 | Freight train transfinite computer vision inspection system |
| CN104457576A (en) * | 2014-12-18 | 2015-03-25 | 成都主导软件技术有限公司 | Method for object size re-checking |
| CN104931023A (en) * | 2015-05-28 | 2015-09-23 | 中国核电工程有限公司 | Photogrammetric method of cooling tower outlet fog plume |
| US10681257B2 (en) | 2015-08-26 | 2020-06-09 | Zhejiang Dahua Technology Co., Ltd. | Methods and systems for traffic monitoring |
| US11514680B2 (en) | 2015-08-26 | 2022-11-29 | Zhejiang Dahua Technology Co., Ltd. | Methods and systems for traffic monitoring |
| CN105157608A (en) * | 2015-08-31 | 2015-12-16 | 浙江大华技术股份有限公司 | Detection method, apparatus, and system of oversized vehicle |
| CN105157608B (en) * | 2015-08-31 | 2018-12-07 | 浙江大华技术股份有限公司 | A kind of detection method of overrun vehicle, apparatus and system |
| CN106705908A (en) * | 2016-12-12 | 2017-05-24 | 广西壮族自治区计量检测研究院 | Calibration device for vehicle overall dimension measuring instrument |
| CN107999402A (en) * | 2017-11-28 | 2018-05-08 | 商丘星林电子产业有限公司 | Tile-type product detection device |
| CN110360947A (en) * | 2019-06-24 | 2019-10-22 | 广州市奥特创通测控技术有限公司 | A kind of vehicle's contour measurement method based on vector image measurement |
| CN110660226A (en) * | 2019-10-30 | 2020-01-07 | 浙江大华技术股份有限公司 | Method, system and equipment for detecting vehicle safety standard and storage device |
| CN112268548A (en) * | 2020-12-14 | 2021-01-26 | 成都飞机工业（集团）有限责任公司 | Airplane local appearance measuring method based on binocular vision |
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Open date: 20070822 |