CN1865950A - Automatic aligning method for printed circuit board - Google Patents
Automatic aligning method for printed circuit board Download PDFInfo
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- CN1865950A CN1865950A CN 200610074585 CN200610074585A CN1865950A CN 1865950 A CN1865950 A CN 1865950A CN 200610074585 CN200610074585 CN 200610074585 CN 200610074585 A CN200610074585 A CN 200610074585A CN 1865950 A CN1865950 A CN 1865950A
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Abstract
The related auto positioning method for a PCB when detecting comprises: setting a feature location area on the standard image, storing the data; for locating the PCB, scanning the feature area to collect data and match the standard image, using mathematic logic calculation to obtain the offset and rotation angle.
Description
Technical field
The present invention relates to a kind of automatically to method for position, relate in particular to a kind of printed circuit board (PCB) in detecting automatically to method for position.
Background technology
Pcb board, also be referred to as printed circuit board (PCB), at present, printed circuit board (PCB) has had widely in field of electronic devices to be used, they both had been useful in the main equipment of picture guided missile and industrial control equipment and so on, also were useful in the midget plants such as picture phone, radio and personal computer.The printed circuit board (PCB) of moulding generally comprises effective image-region and invalid image-region.Printed circuit board (PCB) behind the formation circuit, can cause defective through overexposure, corrosion because of a variety of causes, therefore need printed circuit board (PCB) be detected by relevant checkout equipment.In circuit board is detected, generally handle respectively at each circuit board to be detected, comprise following operation: the printed circuit board (PCB) that earlier printed circuit board (PCB) to be detected is fixed in detection zone, detect printed circuit board (PCB), will detect shifts out detection zone.Usually, when detecting, need in the invalid image-region of printed circuit board (PCB), get two pilot holes earlier, by tommy printed circuit board (PCB) is fixed on detection zone again, carry out image-capture with camera then by automatic contraposition tapping and plugging machine.In above-mentioned steps, then in the testing process of printed circuit board (PCB), just need many one and beat dowel hole and the step of laying fixed printed circuit board by register pin, need to be exclusively used in the device (for example: adopt the pneumatic photoelectric positioning PS plate contraposition of CCD tapping and plugging machine) of beating dowel hole simultaneously, and in beating the process of dowel hole, occur deviation easily or dowel hole is beaten in the zone of effective image, cause the waste of printed circuit board (PCB), and when positioning printed circuit board (PCB), need take a long time, and when carrying out the location of printed circuit board (PCB), can be owing to the wearing and tearing of dowel hole cause the degree of accuracy that detects not high, make that the operation of whole detection is loaded down with trivial details, the efficient that detects is not high, and the error rate height.
Summary of the invention
The technical problem to be solved in the present invention is to solve printed circuit board (PCB) to simplify working process, improve the degree of accuracy when detecting and improve detection efficiency in testing process.
In order to solve above-mentioned technical matters, the present invention adopts following method:
A kind of printed circuit board (PCB) is carried out in the testing process automatically to method for position, comprise the steps:
(a) set the feature location zone: set a feature location zone in the standard picture of printed circuit board (PCB), the particular data that extraction feature location zone is relevant also is stored in the storage device of pick-up unit;
(b) gather real image: the related data of gathering the real image of printed circuit board (PCB) to be detected and taking real image on pick-up unit is in the temporary storage location of pick-up unit;
(c) compare and search: the matched and searched particular data is carried out in the feature location zone to standard picture and real image, finds out the real offset and/or the anglec of rotation;
(d) finish the location: find the real offset and/or the anglec of rotation, standard picture is moved or rotary manipulation, finish the location.
In (a) step, the particular data storage of extracting can be deposited in the memory storage of PCB detecting device;
(c) real offset of step indication and/or the anglec of rotation are meant side-play amount and/or the anglec of rotation of real image with respect to standard picture;
Described method for position is also included step (f): can not find the side-play amount and the anglec of rotation of (c) step, prompting contraposition failure is withdrawed from from newly searching;
(d) in the step, further comprised again and found the real offset and the anglec of rotation, write down the related data of its side-play amount and the anglec of rotation; According to the real offset of record and the related data of the anglec of rotation, in pick-up unit, standard picture is carried out offset and angle rotation, finish the contraposition process.
As a kind of preferred version, wherein (a) step can be entered the feature location zone by first process software and sets, and its correlation step is as follows:
The unlatching of process software;
The feature location zone is set: the feature location zone to standard picture is provided with, and extracts the relevant particular data in feature location zone;
Compare and search, the characteristic area of standard picture and real image is carried out the matched and searched particular data,, find out the real offset and/or the anglec of rotation by the mathematical logic computing;
Data processing finishes, and withdraws from.
As a kind of preferred version, wherein (c) step can be entered the feature location zone by second process software and sets, and its correlation step is as follows:
The unlatching of process software;
The initialization of motion: make the X/Y motion of pick-up unit when beginning, be in init state.
Compare and search: the characteristic area to standard picture and real image carries out the matched and searched particular data, by the mathematical logic computing, finds out the real offset and/or the anglec of rotation;
Data processing finishes, and withdraws from.
As a kind of preferred version, described first process software and second process software are designed to same software.
Wherein, after the feature location zone is set, compare search before, can carry out initialization earlier by software to the X/Y motion of pick-up unit, by to the moving of Y mechanism, carry out mobile real image again, the particular data of gathering real image simultaneously is to the buffer area.
In actual mechanical process, (a) the described feature location of step zone can be a block feature graphics field, and (a) the described particular data of step is the planimetric coordinates position of this feature pattern zone in standard picture; In addition, (a) the described feature location of step zone also can be at least two reference points, be labeled as reference point A and reference point B respectively, (a) the described particular data of step is planimetric coordinates value and reference point B the planimetric coordinates value in standard picture of reference point A in standard picture.And as a kind of optimal way of the present invention, preferential employing feature location zone is two reference points, be respectively reference point A and reference point B, described particular data is planimetric coordinates value and reference point B the planimetric coordinates value in standard picture of reference point A in standard picture.
Printed circuit board (PCB) is being carried out in the practical operation of contraposition, the real image of the printed circuit board (PCB) of being put and the position that is stored in the standard picture in the pick-up unit have certain position deviation and/or angle rotation change to some extent to some extent, therefore, in operation, should allow certain position deviation and/or angle rotating range, in the optimal way of the present invention, (c) range of tolerable variance of the horizontal direction of the described side-play amount of step is 0-15mm; (c) range of tolerable variance of the vertical direction of the described side-play amount of step is 0-15mm; (c) range of tolerable variance of the horizontal direction of the described side-play amount of step is 0-15mm, and the range of tolerable variance of vertical direction is 0-15mm.
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of circuit board printed circuit board (PCB) in detecting the contraposition process, need on printed circuit board (PCB), not beat dowel hole, also saved simultaneously and be exclusively used in the device of beating dowel hole, and cost reduces accurate positioning and efficient height.
Description of drawings
Fig. 1 is the printed circuit board (PCB) to be detected of tradition location.
Fig. 2 is a printed circuit board (PCB) to be detected of the present invention.
Fig. 3 is the standard picture of printed circuit board (PCB) of the present invention.
Fig. 4 is the real image of printed circuit board (PCB) to be detected of the present invention.
Fig. 5 is of the present invention to method for position testing process figure.
Fig. 6 is the processing flow chart of process software of the present invention.
Embodiment
See also Fig. 1 and Fig. 2, Fig. 1 is the printed circuit board (PCB) to be detected of tradition location, and Fig. 2 is a printed circuit board (PCB) to be detected of the present invention.Wherein, Fig. 1 is the printed circuit board (PCB) under traditional positioned detection technology, include PCB housing 1, invalid image-region 2 and effective image-region 3, between invalid image-region 2 and effective image-region 3, also get through two pilot holes 41,42 (two pilot holes on the printed circuit board (PCB) can be holed with the automatic contraposition tapping and plugging machine of the CCD of a special use).Two pilot holes 41,42 are on same the perpendicular line, and the size of pilot hole is suitable with the scope that does not take effective image.When the printed circuit board (PCB) among Fig. 1 detects, two register pins are installed earlier on the test platform of pick-up unit, the distance at the interval of two register pins is consistent with dowel hole, by two dowel holes on the printed circuit board (PCB) printed circuit board (PCB) is placed on the test platform of pick-up unit again, and then printed circuit board (PCB) is carried out the collection and the detection of image.Adopt traditional detection technique, because the wearing and tearing between pilot hole and the register pin, make the location of printed circuit board (PCB) on the test platform of pick-up unit uncertain, can influence the bearing accuracy when detecting, and the processing procedure cost height of printed circuit board (PCB), complex procedures, want many one drilling process and a CCD contraposition tapping and plugging machine, and complicated operation, pilot hole to be aimed at and put into locating pin, putting a printed circuit board approximately needed for 5 seconds, also occurred easily when making register pin problem such as scrapping because of the printed circuit board (PCB) that inclined to one side hole causes.Fig. 2 is a printed circuit board (PCB) to be detected of the present invention, include PCB housing 1, invalid image-region 2 and effective image-region 3, in effective image-region 3, set the feature location zone, this feature location zone is respectively reference point A51 and reference point B52 for setting two reference points, its particular data is the coordinate of the X/Y axle of reference point A51, the coordinate of the X/Y axle of reference point B52, in the present embodiment, this two reference point is provided with on the same perpendicular line.
See also Fig. 3 and Fig. 4, Fig. 3 is the standard picture of printed circuit board (PCB) of the present invention, and Fig. 4 is the real image of printed circuit board (PCB) to be detected of the present invention.When carrying out the PCB detecting location, printed circuit board (PCB) is put on the test platform of pick-up unit, level one side of PCB housing 1 is close to the X of test platform by bar 61, and a vertical side of PCB housing 1 is close to the Y of test platform by bar 62.At this moment, the particular data of the characteristic area of standard picture (as the coordinate figure of the X-axis and the Y-axis of two reference points) is stored in the memory storage of pick-up unit, as a normal data; Afterwards, pick-up unit carries out image scanning to the real image of printed circuit board (PCB) again, the related data of the X-axis of two reference points of elder generation's scanning collection real image and the coordinate of Y-axis, again scanning collection from real image to the data of two benchmark carry out logical operation relatively with the data that are stored in two reference points in the memory storage, draw between the two the position offset and/or the anglec of rotation, again by these position offsets and/or the anglec of rotation, adjust the data of two reference points in the standard picture in the memory storage, the planimetric coordinates of two reference points of planimetric coordinates and real image of two reference points in the standard picture in the memory storage is consistent, and this moment, the location finished.(afterwards, pick-up unit carries out the scanning of whole image again to real image, search the related defects that printed circuit board (PCB) produces in processing procedure.) use of the present invention to method for position, by scan feature locating area (as reference point), do not adopt register pin to position, accurate positioning, its precision is unaffected, the about 0.02mm of precision, when detection and location, printed circuit board (PCB) only need keep to the side to align, and both saves time, efficient is high again, the time that puts a printed circuit board only needed for 1 second, can improve the speed and the efficient of contraposition in the testing process greatly, simultaneously, also can avoid the problem of scrapping of the printed circuit board (PCB) that causes because making register pin that in traditional detection technique, occurs, save cost.Adopt of the present invention to method for position, it should be noted that, real image is when putting, the position of two reference points of two reference point and standard picture deviation and/or angle to some extent rotates to some extent, therefore, real image has the scope of a permission when scanning, in the present embodiment, the range of tolerable variance of the X-axis of two reference points of the X-axis of two reference points of real image and the coordinate of Y-axis and standard picture and the coordinate of Y-axis is 15mm.
See also Fig. 5, Fig. 5 is localization method testing process figure of the present invention.As shown in Figure 5, testing process of the present invention is as follows: (a) set feature location zone 11: set the feature location zone by process software in the standard picture of printed circuit board (PCB) earlier, and the particular data in feature location zone is stored in the memory storage of pick-up unit; (b) printed circuit board (PCB) put 12: by operator's manually-operated, the printed circuit board (PCB) of location to be detected kept to the side to align to be placed on the test platform of pick-up unit; (c) extracting 13 of image: the moving of X/Y mechanism by pick-up unit reaches the image-capture device to carrying out the extracting of real image near the characteristic area of printed circuit board (PCB) to be detected; (d) template matches searches 14: by process software the characteristic area of standard picture and real image is carried out the matched and searched particular data, by the mathematical logic computing, calculate side-play amount and/or the anglec of rotation of real image with respect to standard picture; (e) failure----withdraws from 15: if can not find the side-play amount and the anglec of rotation of step (d), prompting contraposition failure is withdrawed from from newly searching; (f) success----finishes contraposition 16: if successfully find the side-play amount and the anglec of rotation of step (d), write down the related data of its side-play amount and the anglec of rotation, again according to the side-play amount of record and the related data of the anglec of rotation, in pick-up unit, standard picture is carried out offset and angle rotation, finish the contraposition process of printed circuit board (PCB) afterwards.
See also Fig. 6, Fig. 6 is the processing flow chart of process software of the present invention.As shown in Figure 6, process software is in the process of carrying out software processes, and its flow process is as follows: 1. open 21: open process software earlier; 2. set feature location zone 22: the feature location zone to standard picture is provided with, and particular data is set, and is A (X such as X-axis coordinate that reference point A is set and Y-axis coordinate
1, Y
1), X-axis coordinate and Y-axis coordinate that reference point B is set are B (X
2, Y
2); 3. the motion initialization 23: with the X/Y motion initialization of pick-up unit; 4. actual image acquisition 24: carry out mobile real image by motion Y mechanism, the particular data of gathering real image simultaneously is to buffer zone; 5. template matches searches 25: the characteristic area to standard picture and real image carries out the matched and searched particular data, and by the mathematical logic computing, (∠ a) with respect to the side-play amount (Δ X, Δ Y) of standard picture and/or the anglec of rotation to calculate real image; 6. dispose----withdraw from 26: finish back and withdraw from process software of data processing.
Although the present invention has done detailed explanation and has quoted embodiment as proof, but for those of ordinary skill in the art, obviously can make various replacement schemes, modification and change according to above-mentioned explanation, therefore, all these replacement schemes, correction and change all should be included within the spirit and scope of claim.
Claims (8)
1, a kind of printed circuit board (PCB) is carried out in the testing process automatically to method for position, comprise the steps:
(a) set the feature location zone: set a feature location zone in the standard picture of printed circuit board (PCB), the particular data that extraction feature location zone is relevant also is stored in the storage device of pick-up unit;
(b) gather real image: the related data of gathering the real image of printed circuit board (PCB) to be detected and taking real image on pick-up unit is in the temporary storage location of pick-up unit;
(c) compare and search: the matched and searched particular data is carried out in the feature location zone to standard picture and real image in pick-up unit, finds out the real offset and/or the anglec of rotation;
(d) finish the location: find the real offset and/or the anglec of rotation, standard picture is moved or rotary manipulation, finish the location.
2, as claimed in claim 1 automatically to method for position, it is characterized in that: describedly automatically method for position is also comprised step:
(f) the contraposition failure is withdrawed from: can not find the real offset and/or the anglec of rotation in (c) step, pick-up unit is then pointed out the contraposition failure, withdraws from from newly searching.
3, as claimed in claim 1 automatically to method for position, it is characterized in that: (a) the described feature location of step zone is a block feature graphics field.
4, as claimed in claim 3 automatically to method for position, it is characterized in that: (a) the described particular data of step is the planimetric coordinates position of feature pattern zone in standard picture.
5, as claimed in claim 1 automatically to method for position, it is characterized in that: (a) the described feature location of step zone is at least two reference points, is labeled as reference point A (51) and reference point B (52).
6, as claimed in claim 5 automatically to method for position, it is characterized in that: (a) the described particular data of step is planimetric coordinates value and reference point B (52) the planimetric coordinates value in standard picture of reference point A (51) in standard picture.
7, as claimed in claim 1 automatically to method for position, it is characterized in that: (c) range of tolerable variance of the horizontal direction of the described side-play amount of step is 0-15mm.
8, as claimed in claim 1 automatically to method for position, it is characterized in that: (c) range of tolerable variance of the vertical direction of the described side-play amount of step is 0-15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610074585 CN1865950A (en) | 2005-04-25 | 2006-04-20 | Automatic aligning method for printed circuit board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510034432 | 2005-04-25 | ||
| CN200510034432.5 | 2005-04-25 | ||
| CN 200610074585 CN1865950A (en) | 2005-04-25 | 2006-04-20 | Automatic aligning method for printed circuit board |
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| CN1865950A true CN1865950A (en) | 2006-11-22 |
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| CN 200610074585 Pending CN1865950A (en) | 2005-04-25 | 2006-04-20 | Automatic aligning method for printed circuit board |
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