CN201034949Y - X-ray detection device of printed circuit board - Google Patents
X-ray detection device of printed circuit board Download PDFInfo
- Publication number
- CN201034949Y CN201034949Y CNU2007200482391U CN200720048239U CN201034949Y CN 201034949 Y CN201034949 Y CN 201034949Y CN U2007200482391 U CNU2007200482391 U CN U2007200482391U CN 200720048239 U CN200720048239 U CN 200720048239U CN 201034949 Y CN201034949 Y CN 201034949Y
- Authority
- CN
- China
- Prior art keywords
- ray
- printed circuit
- circuit board
- image
- plc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The utility model discloses a defect X-ray detecting device of a printed circuit board, comprising a rotary X-ray machine, a PLC controller, an image grab card and a PC intelligent system. The rotary X-ray machine is electrically connected with the image grab card which is arranged in a PC machine. The PLC controller is electrically connected with the PC intelligent system and can communicate with each other on line. The PLC controller is electrically connected with the rotary X-ray machine and controls the rotation of the X-ray machine. The PC intelligent system comprises a memory, an image processing module, a control module and a communication module. When the control module of the PC intelligent system finds that one or a plurality of X-ray images do not cover the whole area of the sampling object, the communication module of the PC intelligent system informs the PLC controller to control the rotation of the X-ray machine, thus the relative position adjustment of the X-ray machine and the sampling object printed circuit board can be realized, until the X-ray image covers the whole area of the sampling object. The coverage of the system to the process defect detection of the printed circuit board is increased greatly for the penetrating of the X-ray.
Description
Technical field
The utility model relates to the detection technique of printed circuit board (PCBA) defective that has assembled, is specifically related to the X-ray check device of printed circuit board defect.
Background technology
Along with the develop rapidly of electronic technology, continuing to bring out of the miniaturization of encapsulation and the densification of assembling and various novel encapsulated technology, also more and more higher to the requirement of electronics assembling quality.So method and the technology checked are had higher requirement.The measuring technology of using in electronics assembling test field at present is of a great variety, and have Manual Visual Inspection (MVI), on-line testing (ICT), automated optical commonly used are tested (AOI), X ray test (AXI), functional test (FT) etc. automatically.These detection modes all have oneself advantage and weak point separately.
Different measuring technology characteristics differences.
Manual Visual Inspection (MVI) is a kind of method of with the naked eye checking.Its sensing range is limited, can only check that device neglected loading, direction polarity, model are corrected errors, bridging and part rosin joint.Because Manual Visual Inspection is subject to the influence of people's subjective and objective factor, has very high instability.Manual Visual Inspection is difficult more when handling the thin space chip, and particularly when the BGA device adopted in a large number, to the inspection of its welding quality, Manual Visual Inspection was almost powerless.
Flying probe is a kind of hardware check mode.It is to realize detecting with the method that two probes power up device, and defective such as can detection means lose efficacy, element function is bad.This test mode is to plug-in mounting PCB and to mount the not high PCB of device density more suitable.But the densification of miniaturization of devices and product makes this detection mode obviously show deficiency, can't accurately connect the less probe of area of small size device owing to solder joint.Particularly highdensity consumer electronics product such as mobile phone, probe can can't touch solder joint.It is to adopting shunt capacitance in addition, and the PCB of electric connection mode such as resistance can not accurately measure.So along with the densification and the miniaturization of devices of product, the use amount of flying probe in actual detected work is also fewer and feweri.
The test of ICT needle-bar is a kind of widely used measuring technology.Its advantage is that test speed is fast, is suitable for the large batch of product of single variety.But along with abundant and the raising of packing density and the shortening of new product development cycle of product variety, also utility model is apparent more for its limitation.Its shortcoming mainly shows as following several respects: need specialized designs test point and testing mould, the manufacturing cycle is long, and price is expensive, and the programming time is long; Device miniaturization also causes the test difficulty and tests inaccurate; After PCB carries out change in design, former testing mould can't use.
It is a kind of detection method of rising in recent years that automated optical detects (AOI).It is the image that obtains device or PCB surface visible part by the mode that CCD takes a picture, and relatively judges defective and fault through the processing and the analysis of computing machine then.Its advantage is that detection speed is fast, and the programming time is shorter, can be positioned over the diverse location in the production line, is convenient in time find fault and defective, and production, detection are united two into one.Can shorten and find fault and defective time, in time find out the origin cause of formation of fault and defective.Therefore it is a kind of detection means that adopts often at present.But also there is deficiency in the AOI system, and is as can not the testing circuit mistake, also powerless to the detection of sightless solder joint inner case simultaneously.
There is following deficiency in prior art in the detection technique of printed circuit board: can't invisible solder joint be detected as BGA Package BGA etc., the physical imperfection that some naked eyes can't be seen brings hidden danger of quality to printed circuit board; Can't utilize Flame Image Process and recognition technology that lines a large amount of on the printed circuit board plate and solder joint are carried out quick identification,, improve the reliability of detection speed and quality control to carry out qualitative, quantitative test.
The utility model content
The purpose of this utility model is at above-mentioned the deficiencies in the prior art, and a kind of X-ray check device that possesses the printed circuit board defect of image intelligent analysis is provided.
The X-ray check device of printed circuit board defect of the present utility model comprises rotating X-ray machine, PLC controller, image pick-up card and PC intelligence system; The X-ray machine image pick-up card interior with placing PC is electrically connected; The PLC controller is electrically connected with the PC intelligence system and can online communication; The PLC controller is electrically connected with X-ray machine, the rotation of control X-ray machine;
Described PC intelligence system comprises storer, image processing module, control module, communication module; Defect image classification and numerical characteristic storehouse that described store memory has printed circuit board to occur; The analog picture signal of the X-ray machine of the printed circuit board inherent vice of collection in worksite converts digital picture to by image pick-up card, described digital picture is by image processing module extract real-time feature, and carry out pattern match, thereby defect recognition type and defect size with the feature of storer internal reference image;
When the control module of PC intelligence system finds that one or more x-ray image does not cover the entire area of detected object, then inform the rotation of PLC controller control X-ray machine by PC intelligence system communication module, realize the adjustment of relative position between X-ray machine and the detected object printed circuit board, cover the entire area of detected object up to x-ray image.
Described image processing module comprises zero cross point border seal judge module, significance computing module, Laplce and Gauss (LoG) processing module, threshold value discrimination module; After point of crossing border seal judge module is determined the strong edge of x-ray image of printed circuit board inherent vice, calculated the strong edge of each closed outline that is formed by zero cross point by the significance computing module and count and its ratio of always counting, Laplce and Gauss's processing module produce closed edge and carry out the fast area filling simultaneously; The threshold value discrimination module is differentiated the significance of each closed outline picture element subsequently, determines whether the profile that extracts belongs to object edge.
The communication module of PC intelligence system comprises user's main thread, background work person's thread, serial monitoring thread; User's main thread control background work person's thread and serial monitoring thread; Background work person's thread commander PLC controller carries out a series of actions; The serial monitoring thread is worked in coordination with background work person's thread, guarantees that PLC end correctly carries out according to the instruction of background work person's thread.
The analysis recognition method that adopts said apparatus to carry out printed circuit board inherent vice image comprises the steps: to gather the various defect images that printed circuit board may occur, on the basis of certain sample size, carry out classification of defects and pre-service, extract the numerical characteristic can be used for on-the-spot ONLINE RECOGNITION then, with these classified characteristic storage in PC.After the printed circuit board inherent vice image digitazation with collection in worksite, system carries out feature extraction, pattern match and defect recognition through the automatic analyzing and testing of printed circuit board inherent vice, shows the classification of the defective of surveying and relevant information such as position, size or length on the monitoring screen.
Consider the radiativity of X ray, therefore, the whole zone of x-ray bombardment must be carried out the shielding of large tracts of land strictness by stereotype, the computing machine that is positioned at the shielding house outside is by being electrically connected the x-ray image signal that obtains X-ray machine, and the position of the relative detected object printed circuit board of the X-ray in the lead shield room, it is mutual and implement control then to carry out signal by the PC intelligence system of shielding house outside and Programmable Logic Controller (PLC).
The method that the X-ray check device of above-mentioned printed circuit board defect is used to measure specifically comprises:
---defect image classification that printed circuit board may be occurred is also set up the numerical characteristic storehouse, deposits in the storer of PC;
---the simulating signal of the X-ray machine of the printed circuit board inherent vice of collection in worksite is carried out image digitazation through a high-definition image capture card;
---carry out real-time feature extraction by image processing algorithm at line image;
---resulting feature and the feature that is stored in the reference picture in the described storer are carried out pattern match, defect recognition type and defect size;
---if X-ray can not once cover the entire area of detected object, then passes through the online communication mode by PC intelligence system and PLC controller, realizes the adjustment to relative position between X-ray pipe and the detected object printed circuit board, repeats above-mentioned image detection process;
Described image processing algorithm adopts a kind of algorithm of judging border seal by zero cross point, this algorithm is after determining strong edge, the significance of counting and form with its ratio of always counting in the strong edge that calculates each closed outline that is formed by zero cross point, the closed edge that the method mark that adopts fast area to fill is simultaneously produced by Laplce and Gauss (LoG) operator, passing threshold is differentiated the significance of each closed outline picture element again, determines whether the profile that extracts belongs to object edge.
The online communication method of described PC intelligence system and PLC controller is as follows:
Described communication means utilizes multithreading to realize; PC is by the coordinate synchronization of user's main thread, background work person's thread, the realization of serial monitoring thread and PLC;
The step of described user's main thread comprises:
(1) first making software interface, other modules of initializers;
(2) initialization serial ports is opened the serial monitoring thread;
(3) open background work person's thread, enter printed circuit board and detect link;
The step of described background work person's thread comprises:
(1) size of the current printed circuit board of judgement, the sample that matches in the search database if having, then directly calls this sample parameters; If do not have, then enter the parameter interface manually is set, set up the back and continue thread;
(2) action message of the swing of the X source in the extracting parameter information comprises pendulum angle and X source upper and lower displacement amplitude; By sending these control informations, make X source on correct position, carry out a series of shooting to printed circuit board to PLC; A series of x-ray images that PC obtains carry out Flame Image Process and identification by image processing algorithm; In this process, the each instruction that sends of PC all be receive the serial monitoring thread return carry out the information that last time, the instruction action was finished after;
The step of described serial monitoring thread comprises:
(1) triggering of wait serial ports incident;
(2) receive the data that the PLC end initiatively transmits, judge the data implication that this time transmitted in programming by the judgment rule that the control program of holding with PLC in advance consults; According to the order of PLC operation acts, if the data that transmit are " 1 ", represent that then PLC has completed successfully first element, for example the operation that X source is swung; If the data that transmit represent then that for " 2 " PLC has completed successfully second action, for example finished the action that the control X source up moves; If the data that transmit represent then that for " 3 " PLC has completed successfully the 3rd action, for example finished the control X source to move down;
(3) judge PLC by said method and whether correctly finish required movement, information is returned to background work person's thread, and control is given back background work person's thread.Wait for this thread of serial ports triggering next time simultaneously;
Three big thread dispatching relations are as described below in the described communication means:
Carry out user's main thread of controlling the overall situation earlier, create and startup background work person's thread and serial monitoring thread by main thread; After being created, background work person's thread can command PLC to carry out a series of actions; Just collaborative background work person's thread after the serial monitoring thread is created guarantees that the PLC end correctly carries out according to the instruction of background work person's thread.
Principle of work of the present utility model is as follows: the defect image classification that earlier printed circuit board may be occurred is also set up the numerical characteristic storehouse, deposits in the storer of PC; Then the simulating signal of the X-ray machine of the printed circuit board inherent vice of collection in worksite is carried out image digitazation through a high-definition image capture card, through the automatic analyzing and testing of printed circuit board inherent vice system, carry out real-time feature extraction by the image processing algorithm in the system at line image, then resulting feature and the feature that is stored in the reference picture in the described storer are carried out pattern match, defect recognition type and defect size.If X-ray can not once cover the entire area of detected object, then pass through the online communication mode by PC intelligence system and PLC controller, realization is to the adjustment of relative position between X-ray pipe and the detected object printed circuit board, repeat above-mentioned image detection process, the final testing result that on the monitoring screen, shows whole printed circuit board in real time.
The utility model also provides the system architecture of printed circuit board inherent vice automated image analysis and identification.System comprises X-ray pipe and the X-ray special image booster of taking x-ray image; The printed circuit board inherent vice image of collection in worksite is carried out digitized high-definition image capture card; Finish the PC computing machine of printed circuit board inherent vice automated image analysis and recognizer; Be used to control relative position PLC controller between X source and the detected object printed circuit board, and the stereotype screened room that can place all hardware except PC.
The course of work of system is: after the system power-up, intelligence system on the PC and the control system of PLC are carried out self check and are resetted, this moment, the X-ray pipe was not worked, by the time printed circuit board to be measured is put on the product carriage, shut the stereotype screened room behind the door, start working by PC system control X-ray, when X-ray need be taken in a plurality of positions, instruction in the PC system is directly carried out interactive communication with the PLC controller, and realization is to the position control of X-ray pipe.Finish after the detection of product all sites, close X source earlier, the door of opening the lead shield chamber again takes out detected product.
PC and plc communication design mainly comprise:
(1) confirm that hardware all normally connects by connecting line, both sides adopt the mode of operation coupling of asynchronous serial communication.
(2) the corresponding one group of hardware parameter of a kind of printed circuit board of size and one group of software parameter.Software parameter mainly is the algorithm parameter of using in the image processing, and hardware parameter is the related parameter of PC control PLC, comprises the displacement that X source moves up and down, the angle of X source swing.
(3) after parameter sent PLC to, PLC operated by designated parameter, and in time corresponding state was returned to PC.
(4) printed circuit board of a kind of model of every detection, PC are at first sought the model parameter of coupling from the printed circuit board parameter database.If find coupling, then directly call the parameter indication PLC action in the database; If can not find, then want operating personnel manually to transfer and establish, after accent is established, can add into database.
The utlity model has following technological merit.The one, the higher detection coverage.Can to naked eyes and On line inspection less than the place check that be judged fault such as printed circuit board, suspection is the fracture of printed circuit inner cord cabling, X ray then can very fast checking.Especially X ray can be checked BGA, the hiding device of wafer-level package solder joints such as (CSP).The 2nd, the setup time of test shortens greatly.The 3rd, can observe the defective that other detection means can't reliable detection arrives, such as: rosin joint, airport and moulding are bad etc.Can provide coherent detection information by the computer intelligence system in addition, be used for production process is assessed.As soldering tin amount under solder paste thickness, the solder joint etc.For improving " First Pass Yield " and striving for the target of " zero-fault ", provide a kind of effective detection means.
Description of drawings
Fig. 1 is the structural representation of the utility model device;
Fig. 2 is the block diagram that concerns between the utility model Device Testing functional requirement and the program;
Fig. 3 is the flow chart that the utility model device is used to detect the printed circuit board inherent vice;
Fig. 4 is the flow chart of defects detection function;
Fig. 5 is the flow chart of user's main thread;
Fig. 6 is the flow chart of background work person's thread;
Fig. 7 is the flow chart of serial monitoring thread.
Embodiment
Adopt X-ray check, the inherent vice of printed circuit board is reflected as plane picture.Analysis that the utility model is undertaken by the x-ray image to printed circuit board defect and identification specifically describe the method and system of the automatic analyzing and testing of printed circuit board inherent vice, and method and system of the present utility model can be used for analyzing and discerning any printed circuit board inherent vice image and figure that obtains by electronic method.
The method of method and system available software, hardware or the software and hardware combining of the automatic analyzing and testing of the utility model printed circuit board inherent vice realizes, for example on multi-purpose computer, become system handles software to realize method of the present utility model, or adopt universal or special DSP and on multi-purpose computer, add special-purpose acceleration processor and realize the part software function with Fortran, C language compilation.Below by accompanying drawing method and system of the present utility model is described in detail.It should be noted that at this shape and size in accompanying drawing only are used to make description and interpretation clearer, but not in order to represent strict proportionate relationship.
Fig. 1 is the structural representation of expression the utility model system.PC and the at first POST of PLC controller among the figure guarantee that then the lead shield room closes, again by external power source to the power supply of X-ray pipe, the beginning testing.The annexation of each parts is that high-definition image capture card (can select for use Beijing reach the clouds the high-definition image capture card GrabLink Value model of photon technology group) is installed in the universal slot in the PC; X-ray special image booster (can select the XII75 type of Xi'an optical precision optical machinery research institute for use) and PC are electrically connected; Printed circuit panel products x-ray image check and analysis intelligence system is loaded in the PC as application software, and this systematic analysis and identification are from the x-ray image of the printed circuit board of X-ray special image booster; The X-ray pipe is fixed on the lead shield chamber, can move up and down and swing; PC is electrically connected with the X-ray pipe, and when X-ray can't once cover the entire area of printed circuit board, intelligence system and PLC controller were by the control of interactive communication enforcement to X-ray pipe and printed circuit board relative position to be measured.PC is electrically connected with the PLC of OMRON series via adapter (optional C200H-LK201 model), is electrically connected to the X-ray pipe of the 5000/HP of Oxford company series again.Tested printed circuit panel products is placed on the product carriage that is connected with lead shield chamber mechanical fixation.
Fig. 2 represents the block diagram that concerns between measuring ability demand and the program.
(1) interface operation function comprises with telex network, response message, transmits parameter etc. to intrinsic function and finished by interface dialog box main classes.
(2) finish by the basic operation class of image about the image processing functions such as data field that read, store, show, provide of image.
(3) finish by the data processing class about image detection functions such as edge of image, defects detection, Target Recognition.
(4) communication between Flame Image Process class and the data processing class is finished respectively by two kinds of different matrix class view data is formed generic operation and converts view data to private data format.
Fig. 3 is the process flow diagram that embodies the utility model automatic analyzing detecting method of printed circuit board inherent vice and system handles method.Because the printed circuit board quality testing is main according to the printed circuit board in the storer that pre-deposits PC various taxonomic defficiency images that may occur and the numerical characteristic storehouse of being set up, without the human eye analysis, directly the product image of online acquisition is handled, so that automatic analysis system can be finished pattern match and identification by relative simple numerical computing with computing machine.Program is read the example file parameter earlier from the example storehouse, read in online testing product image again, carries out the image pre-service, checks whether corresponding typical legend is arranged.If find typical legend, then from the example storehouse, read in relevant parameters, press setup parameter partitioned image zone, detect the output testing result according to existing parameter.If the figure of better matching result is arranged, then deposit parameter and image in the legend storehouse, to enlarge the sample storehouse of typical image with typical legend.If not, then direct termination routine.At the legend examination phase,, partitioned parameters then is set and detected parameters is set if do not find typical legend.
Fig. 4 is the main process flow diagram of defects detection function.Comprise certain methods commonly used in many technical field of image processing in this algorithm flow, as: the two-value of the image segmentation that relates in the image pre-service, rim detection, figure image intensifying and image is handled, Laplce and Gauss (LoG) zero passage detection, and the various computing method of analyzing the image geometry feature that relates in the recognizer.At rosin joint, pore, in the number of drawbacks such as device neglected loading, the most significantly target signature is exactly the image closure of defective, the utility model is in algorithm routine, the new algorithm that passes through zero cross point judgement border seal that has adopted the applicant to propose, this algorithm is after determining strong edge, the significance of counting and form with its ratio of always counting in the strong edge that calculates each closed outline that is formed by zero cross point, the closed edge that the method mark that adopts fast area to fill is simultaneously produced by Laplce and Gauss (LoG) operator, passing threshold is differentiated the significance of each closed outline picture element again, determines whether the profile that extracts belongs to object edge.Make algorithm improve accuracy, greatly reduce erroneous judgement Artifact.
Fig. 5 shows when X-ray need be taken in a plurality of positions, directly carries out interactive communication with the PLC controller in the PC system, the user main thread flow process of realization during to the position control of X source or product carriage.The connected mode of the utility model printed circuit board defect detection system PLC control module is that the upper link block (for example connection adaptor C200H-LK201) by RS232 serial ports with the PLC of PC is connected.For realizing communicating by letter of PC and PLC, host computer is a PC, the optional OMRON series of PLC of slave computer, and selecting C200H-LK201 for use is connection adaptor.By adapter, the PLC end can initiatively send data message and hold to PC, informs that PC holds the progress of work of present PLC, and the PC end in time obtains this status information, and makes control corresponding.Fig. 5 has described the unlatching operation of software, and the initialization of module.Promptly when native system software begins to click operation, at first create management and scheduling that user's main thread carries out the overall situation.This thread is other module of initializers system at first, comprises the initialization of database and serial port, guarantees that being connected of host computer and slave computer is errorless.When the user clicked " begin detect " button on the software interface, user's main thread just opens up background work person's thread and the serial monitoring thread carries out collaborative work, the swing of control X source or move to enlarge the shooting area of X-ray.
Fig. 6 shows the course of work of background work person's thread.Be user's main thread when changing background work person's thread over to, background work person's thread is search database at first, mating the area of current printed circuit board, and extracts the parameter of preserving in the database, and this parameter comprises the pendulum angle of X-ray machine ray head or mobile distance.If current printed circuit board is a new model, then need changes parameter over to the manual parameter that is provided with in interface is set.Background work person's thread is dressed up PLC to the parameter information that is obtained according to the plc communication protocol groups and can be sent by the recognition data frame, a series of actions with control PLC, this a series of action is that segmentation is controlled in native system, be some actions that PC will be waited until the intact current indication of PLC correct execution, just can continue to indicate PLC continue to carry out a series of actions down, be free from mistakes in the whole process guaranteeing.PLC is after receiving parameter information and after executing corresponding a series of actions, and the information that PLC meeting active return action is finished is given PC.The serial monitoring thread then is responsible for receiving these return messages and is judged that PLC carries out the situation of action.After getting access to the x-ray image of printed circuit board, the result who obtains analyzing from user's main thread is promptly to the defect recognition classified information of printed circuit board, to carry out the product quality sign.
Figure 7 shows that the course of work flow process of serial monitoring thread.When the operation execution information of PLC end transmission triggered this thread, this thread was judged the execution that PLC is performed by negotiation prior and PLC end program.Owing in programming, reach an agreement on to transmit numeral " 1 " in PLC in advance, " 2 ", " 3 " are represented three kinds of different actions of PLC respectively, represent PLC control X source to swing as " 1 ", on behalf of PLC control X source, " 2 " up move, and on behalf of PLC, " 3 " control X source and moved down etc.When the serial monitoring thread reads out digital that PLC transmits, just can judge the situation of the current execution of PLC.The serial monitoring thread in time returns to background work person's thread to the duty of these PLC, so that allow background work person's thread work on.
X ray can be checked the quality of welding spot of BGA, the hiding device of wafer-level package solder joints such as (CSP), mainly be to utilize the penetrability of X-ray and the small focus of X-ray to carry out accurate shape shooting to the small size position, amplify identification again, reach and detect the purpose surface and multiple different process defective solder joint inside.The defective of rosin joint and pore etc. all are shown as in local background in x-ray image, for example a solder joint as a setting, Ming Liang closed region comparatively, the zero cross point that recognition system provides by the utility model judges that the quality of the algorithm butt welding point of border seal judges, as find the defective of solder joint or bigger pore, then on computer screen, pointed out, and its position on the printed circuit board plate is indicated.
The detection of device neglected loading adopts the method for scanning coupling to detect.The printed circuit board plate that system has conformed to quality requirements model to be detected and assembling earlier passes through scanning sample, deposit calculator memory in, done the coupling that the data of sampling are carried out geometric configuration in the printed circuit board plate that each piece is detected by X-ray machine and the computing machine then, when finding the unmatched zone of shape is arranged, carry out further gray scale and geometric configuration again and judge, the device that determined whether neglected loading at last.
Claims (1)
1. the X-ray check device of a printed circuit board defect, it is characterized in that: described pick-up unit comprises rotating X-ray machine, PLC controller, image pick-up card and PC intelligence system; The X-ray machine image pick-up card interior with placing PC is electrically connected; The PLC controller is electrically connected with the PC intelligence system and can online communication; The PLC controller is electrically connected with X-ray machine, the rotation of control X-ray machine; Defect image classification and numerical characteristic storehouse that the store memory of described PC intelligence system has printed circuit board to occur.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200482391U CN201034949Y (en) | 2007-02-05 | 2007-02-05 | X-ray detection device of printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200482391U CN201034949Y (en) | 2007-02-05 | 2007-02-05 | X-ray detection device of printed circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201034949Y true CN201034949Y (en) | 2008-03-12 |
Family
ID=39195839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200482391U Expired - Fee Related CN201034949Y (en) | 2007-02-05 | 2007-02-05 | X-ray detection device of printed circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201034949Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825658B (en) * | 2010-02-03 | 2012-01-04 | 福建捷联电子有限公司 | System and method for automatically testing power of display equipment on production line |
| CN106897994A (en) * | 2017-01-20 | 2017-06-27 | 北京京仪仪器仪表研究总院有限公司 | A kind of pcb board defect detecting system and method based on layered image |
| CN109934808A (en) * | 2019-03-04 | 2019-06-25 | 佛山市南海区广工大数控装备协同创新研究院 | One kind being based on image Multiple Shape normal direction gradient difference value pcb board defect classification method |
| CN111696104A (en) * | 2020-06-23 | 2020-09-22 | 广东电网有限责任公司计量中心 | Method and device for positioning crystal oscillator load capacitance defects of metering chip of intelligent electric meter |
-
2007
- 2007-02-05 CN CNU2007200482391U patent/CN201034949Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825658B (en) * | 2010-02-03 | 2012-01-04 | 福建捷联电子有限公司 | System and method for automatically testing power of display equipment on production line |
| CN106897994A (en) * | 2017-01-20 | 2017-06-27 | 北京京仪仪器仪表研究总院有限公司 | A kind of pcb board defect detecting system and method based on layered image |
| CN109934808A (en) * | 2019-03-04 | 2019-06-25 | 佛山市南海区广工大数控装备协同创新研究院 | One kind being based on image Multiple Shape normal direction gradient difference value pcb board defect classification method |
| CN111696104A (en) * | 2020-06-23 | 2020-09-22 | 广东电网有限责任公司计量中心 | Method and device for positioning crystal oscillator load capacitance defects of metering chip of intelligent electric meter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100559172C (en) | The X-ray check method of printed circuit board defect | |
| CN103808732B (en) | Capacitive detection system based on machine vision and method | |
| CN101706458A (en) | Automatic detection system and detection method of high resolution printed circuit board | |
| CN209300267U (en) | A kind of cigarette appearance images processing control system and its on-line measuring device | |
| CN109584227A (en) | A kind of quality of welding spot detection method and its realization system based on deep learning algorithm of target detection | |
| CN101532926A (en) | On-line vision detecting system for automatic impact specimen processing device and image processing method thereof | |
| JPS62219632A (en) | Apparatus and method for automatic inspection of soldering state of circuit board | |
| CN109429473A (en) | Automatic check method and device with polarity electronic component in circuit board | |
| CN201034949Y (en) | X-ray detection device of printed circuit board | |
| CN107393270A (en) | A kind of portable vision inspection device and method for electric meter detection | |
| CN104063873A (en) | Shaft sleeve part surface defect on-line detection method based on compressed sensing | |
| CN108627520A (en) | A kind of on-line detecting system and method for heterogeneous solid material presentation quality | |
| CN112014404A (en) | Component detection method, device, system, electronic equipment and storage medium | |
| CN108647677A (en) | The ammeter appearance and performance intelligent detecting method and device that view-based access control model calculates | |
| CN106980099B (en) | A kind of calibration method and system of Automatic Testing System of Circuit Board | |
| CN105891763A (en) | Power meter operation fault intelligent processing system and a method thereof | |
| CN113588653A (en) | System and method for detecting and tracking quality of aluminum anode carbon block | |
| CN114577135B (en) | 3D detection method and system for chip pin warpage based on single lens | |
| CN109773790B (en) | Intelligent detection system and method based on machine vision and BIT technology | |
| CN207147411U (en) | A kind of Size Measuring System based on 3D laser cameras | |
| CN108917595A (en) | Glass on-line measuring device based on machine vision | |
| CN209247652U (en) | Rivet surface defect on-line measuring device on a kind of big shell | |
| CN114486902B (en) | Quality detection system and method | |
| CN109813724A (en) | A kind of capacitor appearance automatic fraction collector | |
| CN110174063A (en) | A kind of neutral pen ink height detecting system and detection method based on machine vision |
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: 20080312 |