JPH05259700A - Circuit board inspecting apparatus - Google Patents

Abstract

PURPOSE:To shorten an forming operation of inspection reference data by reading data of a type, a position, a mounting angle, etc., of a mounting component corresponding to each inspection field from memory means based on a position of the field input through input means. CONSTITUTION:Data of a shape, a size, a position, etc., of a mounting component of an entire circuit board 1 with a mark 1a of the board 1 as a basic point are read from memory means 9. A plurality of positions of the field for imaging the board l by a second camera 4 is input through a keyboard 5, and data to become a reference when a type, the position, a mounting angle, etc., of the component mounted in the same field are inspected are formed. Then, the reference data is corrected by using an actual circuit board 1 having no mounting malfunction. Accordingly, a forming operation can be easily conducted in a short time as compared with manual operating input of the reference data, and the position of the field may be reset when the field is altered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit board inspection device for inspecting the mounting state of electronic components mounted on a circuit board.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional component mounting system for automatically mounting electronic components on a circuit board and inspecting the mounting state.

In the figure, 21 is a circuit board and 22 is X.
-A movement table composed of a Y-table, 23 a first camera for mark detection, 24 a second camera for mounting state inspection, 25 a keyboard, 26 a monitor, 27 Is an inspection device for performing positioning and mounting inspection of the circuit board 1, 28
Is a table drive circuit.

The inspection device 27 program-processes a series of inspections with an image memory for storing image data obtained through the cameras 23 and 24, a reference data memory for storing inspection reference data. It is equipped with a micro computer and the like.

The inspection procedure in the mounting system will be described with reference to FIG.

First, the basics of inspection prior to mounting and inspection,
A reference teaching data is input (S1). Here, the positions of a plurality of inspection fields of view imaged by the second camera 24 on the circuit board 21, and the inspection reference data in each inspection field, that is, the types, positions and mounting angles of the components mounted in the inspection fields of view. With the reference data when inspecting etc.,
Key the judgment allowable value and the position reference data etc. of the circuit board 21.
Input each through the board 25.

After inputting the teaching data, the unmounted circuit board 21 is carried onto the movable table 22 in the recognition station NS and the circuit board 21 is positioned (S2, S3). .. Specifically, the circuit board 21 on the moving table 22 is imaged by the first camera 23,
The moving table 22 is driven so that the mark 21a provided on the above-mentioned position coincides with the position reference data.

After the completion of positioning, the moving table 22 is moved to the mounting station SS, and various components are mounted on the circuit board 21 by a component mounting mechanism (not shown) (S).
4, S5).

After the mounting is completed, the movable table 22 is returned to the recognition station NS, and the circuit board 21 is fixed to the second camera 24.
Then, the circuit board 21 is positioned in the same manner as above (S6, S7).

After the completion of positioning, one of the inspection fields of view is selected, the same inspection field of view is picked up by the second camera 24, and the image data obtained here is compared with the above-mentioned inspection reference data to determine the mounting state. The quality of is determined (S8, S9). Since the quality judgment is well known, a detailed description thereof will be omitted. However, if the mounted component is erroneously mounted or if the mounting position has a deviation exceeding an allowable range, it is determined to be defective mounting.

The above-mentioned inspection of the mounting state is performed on the entire inspection visual field, and after the inspection is completed, the inspection result is outputted and the circuit board 21 is carried out from the moving table 22 (S10, S1).
1, S12). The carried-out defective circuit board 21 is removed from the line in a later step based on the above output result.

[0012]

However, in the above-mentioned prior art, it is necessary to manually input the position of the inspection visual field and the inspection reference data for each inspection visual field for each circuit board to be inspected. In particular, there is a problem that it takes a considerable amount of time and labor to input the inspection standard data relating to the type, position and mounting angle of the mounted parts. Further, even when the inspection visual field position is changed, all the inspection reference data must be recreated, which makes the work extremely troublesome.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a circuit board inspecting apparatus which can easily produce inspection reference data.

[0014]

In order to achieve the above object, according to a first aspect of the present invention, a camera capable of picking up an image of a circuit board after component mounting for each of a plurality of inspection visual fields, and an imaging device obtained for each inspection visual field through the camera. A circuit board provided with image judging means for judging whether the mounting state of the component is good or bad by comparing the data with inspection standard data concerning the type, position, mounting angle, etc. of the mounted component which are defined in advance in each inspection visual field. In the inspection device, storage means for storing the design data of the circuit board and the mounted components,
Input means for inputting the position of each inspection visual field, and inspection standard data for reading the data of the type, position, mounting angle, etc. of the mounted component in each inspection visual field from the storage means to create the inspection standard data. -Providing means for creating data.

According to the second aspect of the present invention, a camera capable of picking up images of the circuit board after component mounting for each of a plurality of inspection fields of view and imaging data obtained through the camera for each inspection field of view are defined in advance for each of the inspection fields of view. In the circuit board inspection device, which is equipped with an image determination means for determining whether the mounted state of the component is good or bad by comparing it with the inspection reference data relating to the type, position and mounting angle of the mounted component, the design of the circuit board and the mounted component. Storage means for storing data, inspection visual field position setting means for setting the position of the inspection visual field with respect to the circuit board from the visual field size of the camera,
There is provided inspection reference data creating means for reading the data of the type, position, mounting angle, etc. of the mounted component in each inspection visual field from the storage means to create the inspection reference data.

[0016]

In the circuit board inspection apparatus according to the first aspect of the present invention, based on the position of the inspection visual field input through the input means, the data such as the type, position and mounting angle of the mounted component corresponding to each inspection visual field is stored. The inspection standard data is created by reading out from the means. That is, in this apparatus, the inspection reference data can be automatically created only by inputting the position of the inspection visual field.

Further, in the circuit board inspection apparatus according to the present invention, the position of the inspection field of view with respect to the circuit board is set from the size of the field of view of the camera, and the inspection field of view is made to correspond to each of the set inspection field of view. Data such as the type, position, and mounting angle of the mounted component is read from the storage means to create inspection reference data. In other words, this apparatus can automatically set the inspection visual field position and create the inspection reference data.

[0018]

1 and 2 show an embodiment of the present invention. FIG. 1 is a block diagram of the essential parts of a component mounting system, and FIG. 2 is a flow chart relating to the creation of teaching data. is there.

In FIG. 1, 1 is a circuit board, and 2 is XY.
A moving table composed of a table or the like, 3 a first camera for mark detection, 4 a second camera for mounting state inspection, 5 a keyboard, 6 a monitor, 7 an inspection A device, 8 is a table drive circuit, and 9 is a memory device. The configuration excluding the inspection device 7 and the storage device 9 is the same as that of the conventional example shown in FIG.

The storage device 9 is for storing the design data of the circuit board and the mounting parts to be inspected, and a storage device using a magnetic tape, a magnetic disk or the like is used. The storage device 9 stores data when the circuit board and the mounted components are designed by CAD.

The inspection device 7 program-processes a series of inspections, and an image memory for storing image data obtained through the cameras 3 and 4, a reference data memory for storing inspection reference data. It has a microcomputer and the like, and has a function of creating teaching data in addition to the functions of positioning and mounting inspection of the circuit board 1.

The procedure for creating this teaching data will be described in detail below with reference to FIG.

First, the data such as the shape, size and position of the mounted components in the entire circuit board 1 based on the mark 1a of the board 1 is read from the storage means 9 (ST1).

When the reading is completed, the position setting of the inspection visual field is prompted (ST2). Here, the positions (coordinates) of a plurality of inspection fields to be imaged by the second camera 4 are input to the circuit board 1 through the keyboard 5.

When the input of the inspection visual field position is completed,
From the data read in ST1, the inspection reference data in the inspection visual field, that is, the type of parts mounted in the inspection visual field,
Data to be a reference when inspecting the position, the mounting angle, etc. is created (ST3).

Next, the inspection reference data is corrected using an actual circuit board having no mounting defect (hereinafter referred to as a teaching board) (ST4). Specifically, the inspection field of view of the teaching board is imaged by the second camera 4, and the position of the component in the image data and the position of the component in the inspection reference data are compared to find a positional deviation between them. In some cases, the inspection data is corrected by the amount of deviation and stored as normal inspection reference data.

The processing from ST2 to ST4 is performed for the entire inspection visual field, and the preparation of the teaching data is completed (ST5). After creating the teaching data,
The mounting of components and the inspection of the mounting state are performed by the procedure from S2 shown in FIG.

As described above, according to this embodiment, only by inputting the position of the inspection visual field through the keyboard 5, the data such as the type, position and mounting angle of the mounted component corresponding to each inspection visual field can be obtained. The inspection reference data can be automatically created by reading the data from the storage device 9, and the creation work can be completed in a shorter time than the conventional method in which the inspection reference data is manually input. Can be done easily.

Further, when the inspection visual field is changed, the inspection reference data is set in the same manner as above by merely resetting the position of the inspection visual field.
It is extremely convenient to create data.

Moreover, the design data stored in the storage device 9 is stored.
Since the data used when the circuit board and the mounted components are designed by CAD can be used as the data, there is no need to separately prepare the design data.

In the above embodiment, the position of the inspection visual field with respect to the circuit board is manually input, but the entire circuit board is covered based on the visual field size of the second camera. If the position of the inspection visual field is determined, it is possible to automate the work for setting the position of the inspection visual field.

The contents of the inspection standard data can be changed according to the number and form of electronic components mounted on the circuit board, and other data such as the component size and the judgment allowable value can be used as the inspection standard. It may be included in the data.

[0033]

As described in detail above, according to the circuit board inspection apparatus of the first aspect, it is possible to input the position of the inspection visual field through the input means, and to sort the type of mounted component corresponding to each inspection visual field. The inspection reference data can be automatically created by reading the data such as the position and the mounting angle from the storage device, and the inspection reference data can be manually input as compared with the conventional one. The creation work can be easily performed in a short time. Further, even when the inspection visual field is changed, the inspection reference data can be created in the same manner as described above simply by resetting the position of the inspection visual field, which is extremely convenient.

According to the circuit board inspection apparatus of the second aspect, the position of the inspection field of view with respect to the circuit board can be automatically set from the size of the field of view of the camera, thus eliminating the work of inputting the inspection field of view. Therefore, a series of operations can be performed more simply.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a component mounting system showing an embodiment of the present invention.

FIG. 2 is a flow chart for creating teaching data.

FIG. 3 is a block diagram of a component mounting system showing a conventional example.

FIG. 4 is a flowchart showing an inspection procedure.

[Explanation of symbols]

1 ... Circuit board, 4 ... Second camera, 5 ... Keyboard, 7 ...
Computer, 9 ... Storage device.

Claims (2)

[Claims] 1. A type of mounting component, in which a camera capable of capturing an image of a circuit board after mounting components in a plurality of inspection fields and imaging data obtained through the camera for each inspection field are defined in advance in each inspection field. , A circuit board inspecting device equipped with an image judging means for judging the quality of the component mounting state by comparing with inspection standard data relating to position and mounting angle etc., and storing design data of the circuit board and mounting components. Storage means, input means for inputting the position of each inspection field of view, and data of the type, position, mounting angle, etc. of the mounted component in each inspection field of view are read out from the storage means and the inspection reference data is obtained. A circuit board inspection device, comprising: an inspection standard data creating means to be created. 2. A type of mounting component preliminarily defined in each inspection field of view, and a camera capable of capturing an image of the circuit board after mounting the component for each of the inspection fields of view and imaging data obtained for each inspection field of view through the camera. , A circuit board inspecting device equipped with an image judging means for judging the quality of the component mounting state by comparing with inspection standard data relating to position and mounting angle etc., and storing design data of the circuit board and mounting components. Storage means, an inspection visual field position setting means for setting the position of the inspection visual field with respect to the circuit board from the visual field size of the camera, and data such as the type, position and mounting angle of the mounted component in each inspection visual field are read from the storage means. And an inspection reference data creating means for creating the inspection reference data described above.