JP4643848B2 - Mounting component inspection method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an appearance inspection method for components mounted on a circuit board, and component inspection data when multiple types of components having the same characteristics but different appearances are mounted at the same position on a plurality of substrates. It is related with the mounting component inspection method and its apparatus which do not need to replace.
[0002]
[Prior art]
In recent years, in the case of mass production, it has become difficult to stably purchase parts from the same parts manufacturer. Therefore, multi-company purchasing, in which parts with the same characteristics are purchased from a plurality of parts manufacturers, is widely adopted so that parts can be purchased at a low price as much as possible to avoid shortage of delivery date and quantity. In this way, when parts are mounted using parts purchased from multiple parts manufacturers using the multi-company purchasing method, even if the characteristics are the same, due to differences in appearance such as differences in polarity marks and differences in external dimensions In the appearance inspection of the mounted component, it has become difficult to perform the inspection using the same component inspection data.
Therefore, parts inspection data corresponding to the types of purchased parts from multiple parts manufacturers is created in advance for each type, and when mounting parts are mounted on the board, the board inspection data is classified by manufacturer. Inspected by changing to the part inspection data corresponding to.
[0003]
[Problems to be solved by the invention]
However, if there are many types of purchased parts and the replacement is severe, every time the parts are replaced and mounted on the board, the inspection device must be stopped and the board inspection data must be changed to the part inspection data that matches the mounted part. Don't be. Therefore, if there are many types of purchased parts and their replacement is frequently performed, unnecessary time for process change occurs, and mistakes in changing the board inspection data are likely to occur.
[0004]
In addition, when multiple types of purchased parts are mounted at multiple positions on multiple boards, the number of combinations increases, and it is necessary to prepare as many board inspection data as the number of combinations, which requires time for preparation. .
For example, when 10 component types are mounted at the mounting position A, 5 component types are mounted at the mounting position B, and 2 component types are mounted at the mounting position C, the number of combinations is 10 × 5 × 2 = 100. Also become.
[0005]
The present invention provides a mounted component appearance inspection method that does not require replacing board inspection data by performing inspection using a plurality of types of component inspection data stored in the storage means even when there are many types of purchased parts. And an apparatus for the method.
[0006]
[Means for Solving the Problems]
The mounting component inspection method of the present invention is an inspection method for inspecting the appearance of a component in which a plurality of types of components having the same characteristics but different appearances are mounted at the same corresponding position on a plurality of substrates. A step of storing in a storage means component inspection data corresponding to each type of component, a number of types determination step of determining the number of types of components to be inspected at a position mounted based on the component inspection data, and the components to be inspected A feature amount extracting step of extracting a feature amount of the appearance of the device, a type determining step of determining the type of the component based on the feature amount of the inspection target component, and component inspection data matching the determined type of the inspection target component It has the process of selecting from a memory | storage means and performing an external appearance inspection based on the component inspection data.
[0007]
According to this configuration, in the inspection of a mounting board in which a plurality of types of components having the same characteristics but different appearances are mounted at the same corresponding position on a plurality of boards, the multi-company purchasing parts are previously stored as board inspection data in the storage means. As many parts inspection data as the number of types are stored. Then, when inspecting the position where a plurality of types of parts are mounted, the feature amount of the component is automatically determined first, and the component inspection data that matches the component is automatically selected based on the determined feature amount. Mounting component inspection can be performed.
As a result, even if the type (manufacturer) of the parts mounted at the same position changes, it is not necessary to replace the board inspection data, and the troublesome work when temporarily stopping the inspection apparatus or replacing the board inspection data And prevent mistakes.
[0008]
In the mounting component inspection method having the above-described configuration, when a plurality of substrates are sequentially inspected, the inspection is performed using the component inspection data selected in the inspection of the n−1th substrate in the inspection of the nth and subsequent substrates. When the defect is determined as a result of the inspection, the feature amount extraction step and the type determination step are performed, and the inspection is performed by selecting the component inspection data that matches the determined type of the inspection target component. preferable. Since there is almost no difference in the type of components mounted for each sheet, the feature quantity extraction step and the type determination step for the nth and subsequent sheets can be omitted.
[0009]
A mounting component inspection method according to another aspect of the present invention is an inspection method for performing an appearance inspection of a component in which a plurality of types of components having the same characteristics but different appearances are mounted at the same corresponding position on a plurality of substrates, A step of storing in a storage means component inspection data corresponding to each type of the plurality of types of components in advance, a number of types determination step of determining the number of types of components to be inspected at positions mounted based on the component inspection data, When inspecting an inspection target part at a position where the plurality of types of parts are mounted, a step of sequentially inspecting the inspection target part using a plurality of types of part inspection data, and the respective part inspection data It has a pass / fail discrimination step of discriminating pass / fail of the part to be inspected from the inspection result.
[0010]
According to this configuration, since inspection is sequentially performed using a plurality of types of component inspection data, subsequent inspection can be omitted when the product becomes a non-defective product. Further, the type determination step by feature amount extraction can be omitted.
In the mounted component inspection method having the above-described configuration, it is preferable that a predetermined weighting is performed on the inspection result based on the respective component inspection data in the quality determination step, and the quality of the inspection target component is determined from the weighted inspection result. As a result, it is possible to reduce the discrimination error that occurs when discriminating the type of component, and the inspection accuracy can be further improved.
In addition, a feature amount extraction step is added to the inspection method, (1) the weight of the inspection result of the part determined by the feature amount extraction is increased, (2) or according to the degree of correlation with the feature amount. The inspection accuracy can be further improved by changing the weight of the inspection result of the component.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the mounting component inspection method of the present invention will be described below with reference to the accompanying drawings.
[0012]
Example 1
FIG. 1 is a block diagram illustrating a configuration of a mounting board visual inspection apparatus according to a mounting component inspection method according to a first embodiment of the present invention.
In FIG. 1, components A 11, B 12, C 13, and D 14 mounted at four locations on the mounting substrate 2 are respectively measured by an appearance measuring sensor 1 that moves by a moving mechanism (not shown). The sensor 1 outputs measurement data 3.
In the case of Example 1, the component A 11 mounted on the mounting board 2 is a purchased part from four companies (Ap, Aq, Ar, As), and the mounting board 2 includes four types of parts. A11 is implemented. The part D is a purchased part from two companies (Dp company and Dq company), and two types of parts D14 are mounted on the mounting substrate 2. The parts B and C are purchased parts from one company (Bp company and Cp company), and the same kind of parts B 12 and C 13 are mounted on each board.
[0013]
On the other hand, component inspection data (11a to 14b) corresponding to a plurality of types of components A 11 to D 14 to be mounted is stored in the storage device 5 in advance as substrate inspection data 4.
The number-of-types discriminating unit 6a discriminates the number of types of components mounted at respective positions on the board from the board inspection data 4 stored in the storage device 5.
When there are a plurality of discriminated types of parts, the feature quantity extraction unit 6b extracts feature quantities from the measurement data 3 such as dimensions and brightness measured by the appearance measurement sensor 1. The type discriminating unit 6c compares the feature amount extracted by the feature amount extracting unit 6b with each component inspection reference data in the board inspection data 4, and discriminates the type of the inspection target component.
The inspection unit 7 compares the reference data for component inspection corresponding to the type of component to be inspected with the measurement data 3 from the substrate inspection data 4, determines the quality, and obtains the inspection result 8.
[0014]
FIG. 2 is a block diagram illustrating a configuration of the board inspection data 4 stored in the storage device 5 in the mounting component inspection method according to the first embodiment.
The four types of component inspection data 11a to 11d of the component A and the two types of component inspection data 14a to 14b of the component D include a plurality of data representing the feature quantities of the components of the respective suppliers (Ap to Dq) Data corresponding to inspection items is stored. These feature amount data are, for example, reflected light data from the component surface, label print data, polarity mark type data, component height data, and the like.
[0015]
Next, the mounted component inspection method according to the first embodiment will be described with reference to the flowchart of FIG.
As shown in FIG. 3, in step S <b> 1, for part inspection including the respective feature amounts of the parts A of 4 companies, the parts B of 1 company, the parts C of 1 company, and the parts D of 2 companies. The reference data 11a to 14b are extracted and stored in the storage device 5. In step S2, it is determined whether or not the parts A to D mounted on the board are purchased parts from a plurality of companies. This determination is performed using, for example, the number of component inspection reference data 11a to 11d stored in the substrate inspection data of the component A. In step S3, parts that are not purchased parts from a plurality of companies, such as part B and part C, are inspected using one kind of part inspection data 12a and 13a, respectively, and a discrimination result is output.
[0016]
In step S3, in the case of parts purchased from a plurality of companies, such as part A and part D, the feature quantity of the inspection target part is extracted from the appearance measurement data 3 shown in FIG. In step S4, these feature amounts are compared with the feature amount data stored in the respective component inspection data 11a to 14b to determine which company the component is. In the type discrimination step S5, component inspection data of the discriminated type is extracted. In the component inspection step S6, inspection is performed using the extracted component inspection data, and the inspection result is output.
[0017]
As described above, according to the inspection method of the first embodiment, the type of component mounted is determined based on the feature amount data, and the component of that type is determined from the board inspection data stored in the storage device 5 (FIG. 1). Inspection data can be selected and inspected. As a result, it is not necessary to replace the component inspection data suitable for the type of mounted component as the substrate inspection data, and it is not necessary to temporarily stop the inspection apparatus. Therefore, the inspection time can be shortened, and complicated operations and mistakes when replacing the substrate inspection data can be prevented.
[0018]
In the mounting component inspection method of the first embodiment, when a plurality of substrates are sequentially inspected, first, feature amount extraction is performed in the first substrate inspection. In the subsequent board inspection for the second and subsequent sheets, inspection is performed using the component inspection data extracted for the first sheet.
In such an inspection method, it is preferable to extract the feature amount only when the inspection result is defective and to use the component inspection reference data suitable for the feature amount. By doing so, it is possible to shorten the time spent for feature extraction and further reduce the inspection time.
[0019]
In this case, when the part inspection data determined by extracting the feature quantity is the same as the first part inspection data, it is possible to further reduce the inspection time by discriminating the defect without performing re-inspection. Since purchased parts from a plurality of manufacturers are not usually changed in type for each board, inspection time can be shortened by omitting feature amount extraction in this way.
[0020]
Example 2
FIG. 4 is a flowchart of the mounting component inspection method according to the second embodiment of the present invention. The second embodiment is different from the first embodiment only in the flow of inspection after the step determined to be a purchased part from a plurality of companies. Therefore, the overlapping description of the same parts as those in the first embodiment in FIGS.
As shown in FIG. 4, in the mounted component inspection method of the second embodiment, in the case of purchased parts from a plurality of companies in step S6, the component inspection data 11a to 11a stored in the storage device 5 in advance as board inspection data. Steps S6a to S6d are inspected using 11d sequentially. Here, for example, if the inspection using the Ap company part inspection data 11a results in a non-defective product, the mounted part is determined to be acceptable as the Ap company part A.
[0021]
As described above, when it is determined that the product is non-defective by at least one component inspection data 11a, the inspection result of the inspection target component is accepted, and the subsequent steps 6a to 6d using the component inspection data 11b to 11d are performed. Inspection can be omitted. As a result, the inspection time can be shortened. Further, since feature quantity extraction is not performed, time spent for steps such as feature quantity extraction and part inspection data discrimination can be omitted.
[0022]
In the mounted component inspection method of the second embodiment shown in FIG. 4, as a method of comprehensively judging from the inspection results based on the respective component inspection data, there is a method of weighting the inspection results by the weighting unit 9 indicated by a dotted line in FIG. is there.
As a weighting method, for example, there is a method of extracting feature amounts from measurement data and increasing the weight of inspection results based on component inspection data determined by the feature amounts. Specifically, as shown in FIG. 2, if the type of the part determined from the reflected light data from the part surface extracted from the measurement data of the part A is from Aq, the inspection result based on the part inspection data 11b Increase the weight of.
[0023]
As another weighting method, the feature quantity extracted from the measurement data is compared with the feature quantity of each part inspection data to obtain a correlation, and each part inspection is performed according to the strength of the correlation. There is a method of weighting inspection results based on data. Specifically, when the reflected light data from the component surface extracted from the measurement data of the component A has a strong correlation with that of Ar in the reflected light data of the respective component inspection data 11a to 11d, The weight of the inspection result based on the component inspection data 11c is increased.
As a result, it is possible to reduce the discrimination error that occurs when discriminating the type of the component based on the feature amount, and the inspection accuracy can be further improved.
[0024]
Example 3
The mounted component inspection method of the third embodiment takes into consideration the inspection time, the number of types of multi-company purchased parts, and the inspection accuracy, and the mounting board inspection method of the first and second embodiments for each inspection target part purchased by the multi-company. It is a method of setting which method to use. As a result, it is possible to perform an inspection optimal for the inspection of the mounting board.
For example, when the type of multi-company purchase parts used on the day is known, the inspection time can be shortened and the inspection accuracy can be improved by preliminarily determining the parts inspection data not to be used.
[0025]
【The invention's effect】
As explained in detail in the above embodiment, in the inspection of a board in which a plurality of types of purchased parts are mounted on a plurality of boards, even if a replacement of different types of parts from different parts manufacturers occurs, the board inspection The mounting board can be inspected without replacing data.
As a result, it is possible to eliminate the time loss that occurs when the board inspection data is replaced and the mistake in replacing the board inspection data, thereby enabling highly efficient and highly accurate inspection.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a mounting board visual inspection apparatus according to an embodiment of the present invention. FIG. 2 is a block diagram showing a configuration of board inspection data according to the first embodiment. Flow diagram of substrate inspection method [FIG. 4] Flow diagram of mounting substrate inspection method of embodiment 2 of the present invention [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Appearance measurement sensor 2 Mounting board 3 Measurement data 4 Board inspection data 5 Storage device 6a Type number discrimination | determination part 6b Feature-value extraction part 6c Type discrimination | determination part 7 Inspection part 9 Weighting part 11 Parts A
11a Ap part inspection data 11b Aq part inspection data 11c Ar part inspection data 11d As part inspection data 12 Part B
12a Bp parts inspection data 13 Part C
13a Cp parts inspection data 14 Part D
14a Dp parts inspection data 14b Dq parts inspection data

Claims (5)

An inspection method for inspecting the appearance of parts mounted on the same corresponding position on a plurality of substrates with a plurality of different types of parts having the same characteristics,
A step of storing in a storage means component inspection data corresponding to each type of the plurality of types of components in advance, a number of types determination step of determining the number of types of components to be inspected at positions mounted based on the component inspection data, A feature amount extraction step for extracting the feature amount of the appearance of the inspection target component, a type determination step for determining the type of the component based on the feature amount of the inspection target component, and a component that matches the determined type of the inspection target component select test data from said storage means, have a step of performing a visual inspection based on the component inspection data,
When sequentially inspecting the appearance of a plurality of substrates, the appearance inspection is performed using the component inspection data selected in the appearance inspection of the (n-1) th substrate in the appearance inspection of the nth and subsequent substrates. If the result of the failure is determined, the feature amount extraction step and the type determination step are performed, and the appearance inspection is performed by selecting component inspection data that matches the determined type of the inspection target component.
Mounting component inspection method.   The mounting component inspection method according to claim 1, wherein the feature amount of the appearance of the component to be inspected is a difference in light reflection amount depending on a surface state of the component.   2. The mounting component inspection method according to claim 1, wherein the feature amount of the appearance of the inspection target component is a difference amount of a pattern printed on the surface of the component.   2. The mounting component inspection method according to claim 1, wherein the feature amount of the appearance of the component to be inspected is a difference amount of the display state of the polarity mark of the component.   The mounted component inspection method according to claim 1, wherein the feature amount of the appearance of the component to be inspected is a difference amount of the height dimension of the component.

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