CN101667222A

CN101667222A - Aoi automatic programming method

Info

Publication number: CN101667222A
Application number: CN200910236017A
Authority: CN
Inventors: 江俭
Original assignee: BEIJING XINGHE TAISHITE TECHNOLOGY Co Ltd
Current assignee: BEIJING XINGHE TAISHITE TECHNOLOGY Co Ltd
Priority date: 2009-10-26
Filing date: 2009-10-26
Publication date: 2010-03-10

Abstract

The invention discloses an AOI automatic programming method, comprising the following steps of memorizing the welding pictures of the elements in a database as library elements, respectively collecting the images of PCB without welding elements and PCB with welding elements and comparing the images so as to determine the different points between the boards, and arranging the obtained library elements corresponding to the different points in the different points according to matching of the image characteristics of the different points with the database, thus completing the automatic programming.

Description

The AOI automatic programming method

Technical field

The present invention relates to art of printed circuit boards, in particular to a kind of AOI automatic programming method.

Background technology

Present AOI (Automatic Optical Inspection, automated optical inspection) when the circuit-under-test plate is tested, at first need the element to be tested and the failure mode of circuit board are programmed, equipment could be tested these programmed point then.

The programming process of prior art generally uses two kinds of methods: a kind of is the method that adopts manual programming, and the position of detecting at needs draws detection block one by one; Another kind method is to adopt the chip data of chip mounter, and (position and component kind information are put in the subsides of element) is in conjunction with the component library system of AOI self, and be automatically that detection window is corresponding with measured device, the realization automated programming.

The process of programming generally is divided into " determining the detected element position ", " obtaining the testing standard image ", " measured parameter settles the standard " three processes, wherein first process is the process that needs most the time, if by artificial programming, usually the time that needs 30 fens kind～2 hour, if can obtain the data of chip mounter, also need about 10～20 minutes time to finish first process.

In the prior art, need the data of chip mounter, such requirement can be accomplished for the factory of SMT, but just differ satisfied surely for the trust factory of consigned processing.And owing to need the conversion and the repositioning process of process document, this is to need certain professional standards, to operating personnel's requirement height.Simultaneously, need be with the element library name in the AOI system with on the element library name in the chip mounter to be corresponding, such requirement can bring a lot of extra work amounts.In addition, the chip data form of different chip mounter producer is different, when a factory has multiple brand chip mounter, uses such method more to bother.

The inventor finds in the prior art the having relatively high expectations of operating personnel's technical merit, and the manual programming of having to when not having the chip mounter data, and artificial programming may cause careless omission.

Summary of the invention

The present invention aims to provide a kind of AOI automatic programming method, can solve in the prior art the having relatively high expectations of operating personnel's technical merit, and the manual programming of when not having the chip mounter data, having to, and artificial programming may cause the problem of careless omission.

In an embodiment of the present invention, provide a kind of AOI automatic programming method, may further comprise the steps:

The welding picture of element is saved as the storehouse element in database;

Collection does not have the image of the pcb board of soldered elements and the pcb board that is welded with soldered elements and compares respectively, determines plate differences point;

According to mating in the characteristics of image of discrepancy and the database, the storehouse element corresponding with discrepancy that obtains is placed on finishes automated programming on the discrepancy.

Preferably, in above-mentioned AOI automatic programming method, characteristics of image comprises: area size, color characteristic and image texture.

In the above-described embodiments, compare by tabula rasa that will not have soldered elements and the pcb board that is welded with soldered elements, on the discrepancy that obtains, place corresponding storehouse element, thereby finish automated programming, having relatively high expectations to operating personnel's technical merit in the prior art, and the manual programming of when not having the chip mounter data, having to, and artificial programming may cause the problem of careless omission.

Description of drawings

Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:

Fig. 1 shows AOI automatic programming method process flow diagram according to an embodiment of the invention;

Fig. 2, Fig. 3, Fig. 4, Fig. 5 show the effect screen sectional drawing of AOI automatic programming method in accordance with a preferred embodiment of the present invention.

Embodiment

Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.

Fig. 1 shows AOI automatic programming method process flow diagram according to an embodiment of the invention, may further comprise the steps:

S102 saves as the storehouse element with the welding picture of element in database;

S104, collection does not have the image of the pcb board of soldered elements and the pcb board that is welded with soldered elements and compares respectively, determines plate differences point;

S106 according to mating in the characteristics of image of discrepancy and the database, is placed on the storehouse element corresponding with discrepancy that obtains and finishes automated programming on the discrepancy.

In the present embodiment, compare by tabula rasa that will not have soldered elements and the pcb board that is welded with soldered elements, on the discrepancy that obtains, place corresponding storehouse element, thereby finish automated programming, having relatively high expectations to operating personnel's technical merit in the prior art, and the manual programming of when not having the chip mounter data, having to, and artificial programming may cause the problem of careless omission.

Preferably, in above-mentioned AOI automatic programming method, characteristics of image comprises: area size, color characteristic and image texture.Each independently part drawing look like to extract, according to area size, color characteristic and image texture, in database, find corresponding element, can determine the test parameter of this element, such process approximately needs 3～5 minutes, has saved the programming time greatly.

Fig. 2, Fig. 3, Fig. 4, Fig. 5 show the effect screen sectional drawing of AOI automatic programming method in accordance with a preferred embodiment of the present invention.As shown in Figure 2, at first in the database of AOI equipment, preserve the welding picture of various elements; When a new circuit board needed programming and testing, " tabula rasa " of soldered elements do not put in the AOI equipment earlier, carries out " tabula rasa image acquisition ", can gather the image of several tabula rasas more, so that the difference between compatible tabula rasa, as shown in Figure 3; And then " loaded board " that will be welded with element put into AOI equipment images acquired, as shown in Figure 4; Afterwards, AOI equipment can find the difference of tabula rasa and loaded board automatically, and these differences are exactly the position of soldered elements, also are the test positions of AOI, is the point that needs programming, as shown in Figure 5; Then, AOI equipment can automatically carry out " coupling " to the storehouse image according to area size, color characteristic, the image texture of discrepancy and find the storehouse element of " similar ", is placed on these " disparity map " positions and has finished " automated programming ".

The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. an AOI automatic programming method is characterized in that, may further comprise the steps:

The welding picture of element is saved as the storehouse element in database;

Collection does not have the image of the pcb board of soldered elements and the PCB that is welded with soldered elements and compares respectively, determines plate differences point;

According to mating in the characteristics of image of described discrepancy and the described database, the storehouse element corresponding with described discrepancy that obtains is placed on the described discrepancy finishes automated programming.

2. AOI automatic programming method according to claim 1 is characterized in that, described characteristics of image comprises:

Area size, color characteristic and image texture.