CN103290766A - Pavement crack detection system - Google Patents
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Abstract
The invention discloses a pavement crack detection system which comprises an information acquisition system, a data storage and display system, a power management system, a data processing system and a GPS (global positioning system). The information acquisition system is used for recording pavement damage information in a video mode, the GPS of the GPS positioning system and the highway mileage stake number are combined to position the position of the disease, and the digital image processing technology of the data storage and display system is used for identifying the disease, so that an objective and stable detection result can be obtained, and the disease can be quickly and accurately positioned and measured. Aiming at the pavement crack detection work, the invention realizes the requirements of real-time monitoring of related information, data storage and playback, real-time association of GPS information and mileage stake marks, crack state information measurement and the like, designs a vehicle-mounted detection system and meets the application requirement of actual pavement crack detection.
Description
Technical field
The present invention relates to automatic detection range technology, refer in particular to a kind of pavement crack detection system.
Background technology
Speedway is owing to the influence of traffic load effect and natural cause, and the road surface can produce various breakages gradually.Wherein, pavement crack is as the key character of pavement disease, and its detection method receives publicity always.
The traditional asphalt pavement crack identification work of China mainly relies on manual detection, and there are 4 obvious defects in it: rely on staff's experience, measurement result does not have unified standard; The duration of work personal security is poor, and measurement environment is abominable; Gather, measure length consuming time, operating efficiency is low; Firsthand information is imperfect, and survey data is difficult to check and approve.Just set about launching correlative study one after another as far back as the middle and later periods eighties 20th century abroad, but product is subject to many limitations in quoting: import equipment is expensive, is difficult to promote; Poor consistency with the domestic technique standard; Work such as maintenance of equipment, maintenance, the demarcation dependence that possesses skills.For these reasons, on the basis that has been fruitful, carry out research, development and the application of flexible pavement fast detecting and maintenance technology at home and abroad, for the pipe of the comprehensive raising highway in China level of supporting very important practical sense is arranged.
Summary of the invention
In view of this, the present invention is directed to the disappearance of prior art existence, its main purpose provides a kind of pavement crack detection system, at the pavement crack testing, realize having finished that relevant information is monitored in real time, demand such as real-time related, the crack state measure information of data storage playback, GPS information and mileage pile No..
For achieving the above object, the present invention adopts following technical scheme:
A kind of pavement crack detection system includes information acquisition system, data storage display system, power-supply management system, data handling system, GPS navigation system;
This information acquisition system comprises the CCD line scan camera and the road lighting system of light source is provided for the CCD line scan camera;
This data storage display system comprises main frame, the main frame pci bus that connects main frame, be connected to the SATA hard disk that is used for storing data information of main frame pci bus, the PCI-Express that is used for communication, the demonstration front end that is used for demonstration, be serially connected with the image pick-up card of main frame pci bus, the external trigger adapter, the triggering signal frequency multiplier circuit, this image pick-up card is connected in the CCD line scan camera and gathers vision signal, this triggering signal frequency multiplier circuit receives garage's synchronizing signal, this external trigger adapter is complementary CCD line scan camera camera speed and inspection vehicle travel speed, realizes that vehicular speeds and camera speed are synchronous;
This GPS navigation system is connected in the main frame pci bus, realizes the location of pavement crack position, will deposit main frame on the locating information by the main frame pci bus;
This data handling system comprises pci bus, be connected to being used for that the road pavement crack is analyzed, the data processing platform (DPP) of localization process, being used for PCI-Express and the data backup hard disk of communication of pci bus;
Described power-supply management system provides power supply for information acquisition system, data storage display system, data handling system.
Preferably, described CCD line scan camera uses resolution ratio to reach the electric charge coupling camera of 4m as 2k, bicycle road surface image fabric width.
Preferably, 4 automobile-used 12V DC xenon lamps that power is 36W of described road lighting system's employing, light angle is adjustable in vertical 0 °～75 ° scopes.
Preferably, described IMAQ integrated circuit board embedded digital decoder, A/D converter, proportional zoom module, reduction module, look space-variant die change piece, the vision signal of input passes to host memory through the main frame pci bus and stores through processing such as digital decoder, A/D converter, proportional zoom, reduction, look space-variant change.
Preferably, described triggering signal frequency multiplier circuit comprises the input circuit of series connection successively, optocoupler electrical isolation circuit, the phase demodulation comparison circuit, LPF LPF circuit, voltage-controlled concussion VCO circuit, output circuit, insert 1/N frequency divider between the input of this voltage-controlled concussion VCO circuit and phase demodulation comparison circuit, 1/N frequency divider connects toggle switch, input signal is obtained by the Transistor-Transistor Logic level of inspection vehicle Hall vehicle speed sensor output, through the optocoupler electrical isolation, enter phaselocked loop, it is by phase demodulation PD, LPF LPF, 3 links of voltage-controlled concussion VCO are formed, insert 1/N frequency divider between voltage controlled oscillator and the phase demodulation comparison input, frequency N is controlled by toggle switch.
Preferably, described power-supply management system adopts valve-control sealed lead acid battery to be respectively data acquisition display system and lighting source and differential GPS 12 VDC is provided uninterrupted voltage; Gathering display system Industrial Personal Computer (IPC) equipment needs to change into 220 required V electric mains through 12VDC～220 VAC inverters; The high power UPS of the strict sinusoidal signal of output is used in the camera power supply; After collecting work finished, the off-line type charge circuit by 15 V voltage stabilizings, output current 6 A charged.
Preferably, described main frame is built-in with the program module to the crack processing and identification, comprise pavement image acquisition module and image analysis module, this pavement image acquisition module is mainly finished record and the working state of system function for monitoring of road surface video acquisition and storage, the storage of GPS information, the input of demarcation information and relevant information thereof; This offline image analysis module is mainly finished seamless spliced to image, and the non-linear convergent-divergent of image is browsed, and the enhancing of image is handled, and calculates the location, road surface, according to crack location inquiry original image, and the export function of single image.
The present invention compared with prior art has tangible advantage and beneficial effect, particularly, as shown from the above technical solution, by videograph road surface breakage information, in conjunction with GPS and highway mileage pile No. the disease position is positioned, utilize digital image processing techniques that disease is identified, both can obtain objective stable testing result, can position, measure disease rapidly and accurately again.The present invention is directed to the pavement crack testing, demands such as realization has finished that relevant information is monitored in real time, real-time related, the crack state measure information of data storage playback, GPS information and mileage pile No., design vehicle-mounted detection system, satisfied the application requirements that actual pavement crack detects.
For more clearly setting forth architectural feature of the present invention and effect, the present invention is described in detail below in conjunction with accompanying drawing and specific embodiment.
Description of drawings
Fig. 1 is the system architecture theory diagram of the present invention's embodiment;
Fig. 2 is the schematic diagram of image pick-up card among the present invention's the embodiment;
Fig. 3 is the schematic diagram of triggering signal frequency multiplier circuit among the present invention's the embodiment;
Fig. 4 is image analysis software working interface among the present invention's the embodiment;
Fig. 5 is that inspection vehicle carries out state parameter in Tongzhou Zhang Cailu K5～K10 kilometer highway section to the crack and measures the form that the back statistics generates among the present invention's the embodiment.
The accompanying drawing identifier declaration:
10, information acquisition system 11, CCD line scan camera
12, road lighting system 20, data storage display system
21, main frame 22, main frame pci bus
23, SATA hard disk 24, PCI-Express
25, show front end 26, image pick-up card
261, digital decoder 262, A/D converter
263, proportional zoom module 264, reduction module
265, look space-variant die change piece 27, external trigger adapter
28, triggering signal frequency multiplier circuit 281, input circuit
282, optocoupler electrical isolation circuit 283, phase demodulation comparison circuit
284, LPF LPF circuit 285, voltage-controlled concussion VCO circuit
286, output circuit 287,1/N frequency divider
288, toggle switch 29, garage's synchronizing signal
30, power-supply management system
40, data handling system 41, pci bus
42, data processing platform (DPP) 43, PCI-Express
44, data backup hard disk 50, GPS navigation system
The specific embodiment
Please refer to shown in Figure 1ly, the concrete structure that it has demonstrated the present invention's preferred embodiment includes information acquisition system 10, data storage display system 20, power-supply management system 30, data handling system 40, GPS navigation system 50.
Wherein, this information acquisition system 10 comprises CCD line scan camera 11 and the road lighting system 12 of light source is provided for CCD line scan camera 11.This data storage display system 20 comprises main frame 21, the main frame pci bus 22 that connects main frame 21, be connected to the SATA hard disk 23 that is used for storing data information of main frame pci bus 22, the PCI-Express 24 that is used for communication, the demonstration front end 25 that is used for demonstration, be serially connected with the image pick-up card 26 of main frame pci bus 22, external trigger adapter 27, triggering signal frequency multiplier circuit 28, this image pick-up card 26 is connected in CCD line scan camera 11 and gathers vision signal, this triggering signal frequency multiplier circuit 28 receives garage's synchronizing signal 29, this external trigger adapter 27 is complementary CCD line scan camera 11 camera speeds and inspection vehicle travel speed, realizes vehicle-mounted detection.This GPS navigation system 50 is connected in main frame pci bus 22, realizes the location of pavement crack position, will deposit main frame 21 on the locating information by main frame pci bus 22.This data handling system 40 comprises pci bus 41, be connected to being used for that the road pavement crack is analyzed, the data processing platform (DPP) 42 of localization process, being used for PCI-Express 43 and the data backup hard disk 44 of communication of pci bus 41.Described power-supply management system 30 provides power supply for information acquisition system 10, data storage display system 20, data handling system 40.
System set of the present invention IMAQ, storage, triggering signal frequency multiplier circuit 28, GPS locate related a plurality of function.
Wherein, the collection of data and transmission are to adopt industrial digital camera (CCD line scan camera 11), replace human eye to obtain road surface raw information, many drawbacks such as significantly overcome the fatiguability that visual detection is brought, be subjected to disturb, precision is low.System of the present invention uses resolution ratio to be linear array scanning CCD (electric charge coupling) the camera record pavement image data of 2k.Bicycle road surface image fabric width H reaches 4m, can satisfy the requirement of road surface test width.
During use, CCD line scan camera 11 is fixed on the solid frame of video acquisition, video acquisition sets up admittedly counts plug-type rail structure, the slide rail top utilizes the spiral jackscrew to fix, when having guaranteed the rigidity of structure, taken into account adjustability (the longest tailstock 1. 5m places that place of slide rail can be used for equipment expansion is installed, and have good collection fornt-end compatibility); Adopt the solid plated construction in plane to connect slide rail and vehicle frame, effectively prevent the rail frame vibration influence that shooting causes to camera.For avoiding being subjected to dark space influences such as shade, non-object projection, road lighting system 12 adopts 4 automobile-used 12VDC xenon lamps that power is 36W, all row are installed on the solid frame of the long illumination of 1. 8m, light angle is adjustable in vertical 0 °～75 ° scopes, opened and closed by 5 circuit breakers control light source, wherein 1 the tunnel as power supply master control switch, all the other 4 tunnel corresponding 4 illuminator lamps.
The pavement image signal of ccd video camera collection is analog quantity, finishes analog quantity to the conversion of digital quantity by the IMAQ integrated circuit board of data storage display system 20.As shown in Figure 2, this IMAQ integrated circuit board comprises digital decoder 261, A/D converter 262, proportional zoom module 263, reduces module 264, look space-variant die change piece 265, thereby the vision signal of input passes to main frame 21 internal memories through main frame pci bus 22 and stores through processing such as digital decoder 261, A/D converter 262, proportional zoom, reduction, look space-variant change.Vision signal is transmitted between camera and integrated circuit board by Camera Link bus.
In addition, when the detection speed of a motor vehicle is carried out the detection of bicycle road surface with the speed of 120 km/h, in order to guarantee the strict real-time storage of view data, the not frame losing of information of gathering, system of the present invention adopts RA D0 technology, and storage speed reaches more than 100,000,000, satisfies the real-time storage requirement.
Described triggering signal frequency multiplier circuit 28 can be avoided the storage information redundancy problem brought by the camera programm exposure settings, makes system reach garage and exposure image mates synchronously.During enforcement, integrate Hall Sensitive Apparatus and discharge circuit at the used Hall element of the electronic mileometer of inspection vehicle.The side-play amount of the stepper motor amount of spin in the electronic mileometer movement and the instantaneous mileage pointer of indication all is controlled by the square wave number of hall probe output.All numbers that output shaft rotates are directly proportional with all numbers that driving wheel rotates.The square-wave signal that Hall element produces when utilizing the output of odometer can draw the wheel rotation, control camera triggering through nursing one's health after.Through calculating gained, can satisfy the requirement of inspection vehicle camera exposure frequency under 120km/h speed through 83 frequencys multiplication from the Hall element signal output part.
External trigger exposure signal and the speed of a motor vehicle are mated frequency multiplier circuit principle (as shown in Figure 3) synchronously.Described triggering signal frequency multiplier circuit 28 comprises the input circuit 281 of series connection successively, optocoupler electrical isolation circuit 282, phase demodulation comparison circuit 283, LPF LPF circuit 284, voltage-controlled concussion VCO circuit 285, output circuit 286, insert 1/N frequency divider 287 between the input of this voltage-controlled concussion VCO circuit 285 and phase demodulation comparison circuit 283,1/N frequency divider 287 connects toggle switch 288, input signal is obtained by the Transistor-Transistor Logic level of inspection vehicle Hall vehicle speed sensor output, through the optocoupler electrical isolation, enter phaselocked loop, it is by phase demodulation PD, LPF LPF, 3 links of voltage-controlled concussion VCO are formed, voltage controlled oscillator and phase demodulation relatively insert 1/N frequency divider 287 between the input, frequency N is by toggle switch 288 controls.
Described power-supply management system 30 is followed the design principles of Classification Management, safety isolation, and according to electrical characteristic and power supply signal degree classification in neat formation power supply, Electrical Safety is guaranteed in the control of similar power supply employing total points.Valve-control sealed lead acid battery (maintenance-free battery), have advantages such as voltage is stable, power supply is reliable, conveniently moving, adopt 2 100AH batteries to be respectively data acquisition display system and lighting source and differential GPS in this onboard system 12 VDC are provided uninterrupted voltage.Gathering display system Industrial Personal Computer (IPC) equipment needs to change into 220 required V electric mains through 12VDC～220 VAC inverters.The high power UPS of the strict sinusoidal signal of output is used in the camera power supply.After collecting work finished, the off-line type charge circuit by 15 V voltage stabilizings, output current 6 A charged.
The main frame 21 of this data storage display system 20 is built-in with the program module to the crack processing and identification, comprise pavement image acquisition module and image analysis module, this pavement image acquisition module is mainly finished record and the working state of system function for monitoring of road surface video acquisition and storage, the storage of GPS information, the input of demarcation information and relevant information thereof; This offline image analysis module is mainly finished seamless spliced to image, and the non-linear convergent-divergent of image is browsed, and the enhancing of image is handled, and calculates the location, road surface, according to crack location inquiry original image, and the export function of single image.
The pavement detection system that the design finishes can be taken the coefficient of having a lot of social connections by adjusting shooting angle and setting and the bicycle road be carried out the road surface details collection of different accuracy to the view picture road surface according to the actual requirements.The image capture software of using establishment with the related location of positional information of the image information of gathering and GPS real-time Transmission time and mileage pile No. representative, store, science, record pavement image raw information exactly; Utilize the image analysis software instrument of establishment, can realize GPS, pile No., the mutual retrieval and inquisition of image information, the distortionless convergent-divergent of different proportion is carried out in the crack, and key elements such as its length, width, area are demarcated, calculate, record, export measurement result by software.Fig. 4 is the image analysis software working interface; Fig. 5 measures the form that the back statistics generates for inspection vehicle carries out state parameter in Tongzhou Zhang Cailu K5～K10 kilometer highway section to the crack.The position error of statistics and actual measurement has proved the reliability of system in engineering is used less than 0. 8 m.
The containing much information of Road Detection of the present invention, data volume are big, so when improving precision, solve the contradiction of the big and processing speed of data volume.Introduce parallel processing technique and will improve the speed that image is handled to a great extent.Parallel processing is exactly that finger processor, memory, IO equipment and supporting concurrent software are operated a plurality of process data of same problem simultaneously at synchronization.Parallel processing system (PPS) can adopt the LAN form, selects the quantity of slave as required, the protocol transmission data that basis configures between main frame 21 and the slave.
Main frame 21 is mainly finished control system duty, image taking, storage, demonstration, pretreated work, simultaneously the data based needs that need slave to handle is distributed to each slave, and carries out function such as information fusion; Slave is mainly finished the post processing of image, comprises the calculating of crack identification and characteristic value, then result is sent to main frame 21.System handles speed and disposal ability have so just been guaranteed to a certain extent.
In addition, the data of utilizing GIS (geographical information system) technology to carry out fast detecting are handled automatically, set up highway pavement quality condition GIS network more intuitively, realize detecting data to the direct importing of GIS, from GIS, obtain the road essential information, realize reading automatically of basic detection information.
In sum, design focal point of the present invention is, it is by videograph road surface breakage information, in conjunction with GPS and highway mileage pile No. the disease position is positioned, utilize digital image processing techniques that disease is identified, both can obtain objective stable testing result, and can position, measure disease rapidly and accurately again.The present invention is directed to the pavement crack testing, demands such as realization has finished that relevant information is monitored in real time, real-time related, the crack state measure information of data storage playback, GPS information and mileage pile No., design vehicle-mounted detection system, satisfied the application requirements that actual pavement crack detects.
The above, it only is preferred embodiment of the present invention, be not that technical scope of the present invention is imposed any restrictions, so every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any trickle modification, equivalent variations and modification that above embodiment does.
Claims (7)
1. a pavement crack detection system is characterized in that: include information acquisition system, data storage display system, power-supply management system, data handling system, GPS navigation system;
This information acquisition system comprises the CCD line scan camera and the road lighting system of light source is provided for the CCD line scan camera;
This data storage display system comprises main frame, the main frame pci bus that connects main frame, be connected to the SATA hard disk that is used for storing data information of main frame pci bus, the PCI-Express that is used for communication, the demonstration front end that is used for demonstration, be serially connected with the image pick-up card of main frame pci bus, the external trigger adapter, the triggering signal frequency multiplier circuit, this image pick-up card is connected in the CCD line scan camera and gathers vision signal, this triggering signal frequency multiplier circuit receives garage's synchronizing signal, this external trigger adapter is complementary CCD line scan camera camera speed and inspection vehicle travel speed, realizes that vehicular speeds and camera speed are synchronous;
This GPS navigation system is connected in the main frame pci bus, realizes the location of pavement crack position, will deposit main frame on the locating information by the main frame pci bus;
This data handling system comprises pci bus, be connected to being used for that the road pavement crack is analyzed, the data processing platform (DPP) of localization process, being used for PCI-Express and the data backup hard disk of communication of pci bus;
Described power-supply management system provides power supply for information acquisition system, data storage display system, data handling system.
2. pavement crack detection system according to claim 1 is characterized in that: described CCD line scan camera uses resolution ratio to reach the electric charge coupling camera of 4m as 2k, bicycle road surface image fabric width.
3. pavement crack detection system according to claim 1 is characterized in that: described road lighting system adopts 4 automobile-used 12V DC xenon lamps that power is 36W, and light angle is adjustable in vertical 0 °～75 ° scopes.
4. pavement crack detection system according to claim 1, it is characterized in that: described IMAQ integrated circuit board embedded digital decoder, A/D converter, proportional zoom module, reduction module, look space-variant die change piece, the vision signal of input passes to host memory through the main frame pci bus and stores through processing such as digital decoder, A/D converter, proportional zoom, reduction, look space-variant change.
5. pavement crack detection system according to claim 1, it is characterized in that: described triggering signal frequency multiplier circuit comprises the input circuit of series connection successively, optocoupler electrical isolation circuit, the phase demodulation comparison circuit, LPF LPF circuit, voltage-controlled concussion VCO circuit, output circuit, insert 1/N frequency divider between the input of this voltage-controlled concussion VCO circuit and phase demodulation comparison circuit, 1/N frequency divider connects toggle switch, input signal is obtained by the Transistor-Transistor Logic level of inspection vehicle Hall vehicle speed sensor output, through the optocoupler electrical isolation, enter phaselocked loop, it is by phase demodulation PD, LPF LPF, 3 links of voltage-controlled concussion VCO are formed, insert 1/N frequency divider between voltage controlled oscillator and the phase demodulation comparison input, frequency N is controlled by toggle switch.
6. pavement crack detection system according to claim 1 is characterized in that: described power-supply management system adopts valve-control sealed lead acid battery to be respectively data acquisition display system and lighting source and differential GPS 12 VDC is provided uninterrupted voltage; Gathering display system Industrial Personal Computer (IPC) equipment needs to change into 220 required V electric mains through 12VDC～220 VAC inverters; The high power UPS of the strict sinusoidal signal of output is used in the camera power supply; After collecting work finished, the off-line type charge circuit by 15 V voltage stabilizings, output current 6 A charged.
7. pavement crack detection system according to claim 1, it is characterized in that: described main frame is built-in with the program module to the crack processing and identification, comprise pavement image acquisition module and image analysis module, this pavement image acquisition module is mainly finished record and the working state of system function for monitoring of road surface video acquisition and storage, the storage of GPS information, the input of demarcation information and relevant information thereof; This offline image analysis module is mainly finished seamless spliced to image, and the non-linear convergent-divergent of image is browsed, and the enhancing of image is handled, and calculates the location, road surface, according to crack location inquiry original image, and the export function of single image.
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| CN103669184A (en) * | 2013-12-25 | 2014-03-26 | 河南省高远公路养护技术有限公司 | Invisible disease detection method of pavement structure layer |
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Denomination of invention: Pavement Crack Detection System Effective date of registration: 20220830 Granted publication date: 20160113 Pledgee: Zhejiang Nanxun Rural Commercial Bank branch Shuanglin Limited by Share Ltd. Pledgor: Huzhou Nanxun Phoenix Cultural Tourism Development Group Co.,Ltd. Registration number: Y2022330001965 |