JPH01227006A - Inspecting apparatus for mounting of component parts - Google Patents

Abstract

PURPOSE:To sense an image of a distinct slit pattern of a component parts even when it has a specular surface, by a method wherein slit lights intersecting perpendicularly are applied onto a substrate from above obliquely from two light sources and two image-sensing elements are provided in optical paths of reflected lights. CONSTITUTION:Slit lights intersecting perpendicularly on a substrate 13 are applied onto a component 11 on the substrate on an X-Y table 13, at an angle alphafrom above obliquely from light sources 14 and 15, and two TV cameras 14a and 15a are disposed in optical paths of reflected lights therefrom. In this constitution, the X-Y table 13 is controlled by a control circuit 22 so that the center of the component 11 be positioned at the point of intersection of slit lines intersecting perpendicularly. Then the incident lights from the light sources 14 and 15 are reflected from the component 11 and the substrate 12 and picked up by the TV cameras 14a and 15a. Even when the component part 11 and the substrate 12 have specualr surfaces, an image of a distinct slit pattern is sensed and thus highly-precise inspection of mounting can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention mainly relates to a component mounting inspection device that automatically inspects the mounting state of chip components on a printed circuit board.

(B) Prior Art In this type of conventional component mounting inspection apparatus, as shown in FIG. 4, a board 2 on which a component 1 is mounted is placed on an Then, the X-axis direction slit light source 4 and the Y-axis direction slit light source 5 are respectively installed obliquely upward so as to have an angle α with respect to the substrate 2, and the slits are arranged orthogonally above the substrate 2 and the component I. the light,
An image is taken by an R image 6 provided vertically above the board 2, and the mounting state of the component 1 is detected from the taken image.

(C) Problems to be Solved by the Invention In such a conventional component mounting inspection apparatus, as shown in FIG. 5, slit light SL is incident on the substrate 2 from the light source 4 at an angle α, An image is taken by an image pickup device 6 installed vertically above the part 1. Therefore, if the slit light SL is diffusely reflected on the surfaces of the substrate 2 and the component l, an image having a slit pattern SP as shown in FIG. can get. However, when the component 1 has a mirror-like surface, the slit light SL is reflected by the surface of the component 10 and the slit pattern SP on the component 1 becomes as shown in FIG. 6(b), so that a clear image can be obtained. There was a problem that it was not possible to obtain

This invention was made in consideration of these circumstances,
The present invention provides a component mounting inspection device that can image a clear slit pattern even when the component or board has a mirror-like surface.

(d) Means for Solving the Problems The present invention includes a light source unit that irradiates a board on which a component is mounted with slit light from above, and a V& model for the board and the component! &
In a component mounting inspection device that is equipped with a quadrant and a detection means that detects the mounted state of a component from an image captured by an imaging section, two light sources emit orthogonal slit light onto the board from diagonally above the board, and a This is a component mounting inspection device characterized by comprising an imaging section provided in each optical path of slit light that is reflected in the opposite direction at an angle equal to the angle.

(E) Two light sources are provided to irradiate orthogonal slit light onto the working board from diagonally above the board, and an imaging unit is placed in the optical path of the slit light that is reflected in the opposite direction at an angle equal to the angle of incidence on the board. Since the slit light is provided, even when the slit light is specularly reflected on the components and the substrate, the slit light is sufficiently incident on the imaging section, so that a high-quality slit pattern can be obtained.

(f) Examples The present invention will now be described in detail based on examples shown in the drawings. This does not limit the invention.

FIG. 1 is an explanatory diagram showing the configuration of the present invention, in which 11 is a component mounted on a board 12, and 13 is an X
, an X-Y table that freely moves in the Y direction, and an X-Y table 14 installed obliquely above the X-Y table 13 at an angle α to form a slit line in the Axial slit light source, 15 is printed circuit board 12
To form a slit line in the Y-axis direction on the plane of
- A slit light source in the Y-axis direction installed obliquely above the Y-table 12 at an angle α; reflected light 14a and 15a are reflected at an angle α in a direction opposite to the direction of incidence of the slit light from the light source 14 and 15, respectively; 16.17 is an A/D converter that converts the image signals from cameras +4a and 15a, and 18.19 is an A/D converter 16.
．． A detection circuit detects the mounting state of the component l from the output of 17, 20.21 is an X-axis direction drive circuit and a Y-axis direction drive circuit that drive the X-Y table 13, and 22 is a detection circuit that detects the amount of movement of the X-Y table 13. This is a control circuit that controls the

In such a configuration, the X-axis direction drive circuit 20 and the Y-axis direction drive circuit 21 receive commands from the control circuit 22 to
- The Y table 13 moves and the center of the component 11 to be inspected is located at the X formed by the light source 14° 15 on the surface of the substrate 12.
It is set to be located at the intersection of the axial slit line and the Y-axis slit line. Parts 11 and board 12
has a mirror-like surface, as shown in FIG.
, 15a are installed, the reflected light is imaged as a clear slit pattern SP by the mirrors 14a and 15a as shown in FIG. Furthermore, if the surfaces of the component 11 and the substrate 12 are not mirror-finished, the slit light S
Although L is diffusely reflected on each surface, it goes without saying that the resulting slit pattern can be clearly imaged by the cameras 14a and 15a as before.

(G) Effects of the Invention According to this invention, even if the component to be inspected or the substrate on which the component is installed has a mirror-like surface, the reflected light of the slit light can be efficiently received and a high-quality line can be maintained. Patterns can be imaged, making it possible to inspect component mounting conditions with high precision.

[Brief explanation of the drawing]

FIG. 1 is a configuration explanatory diagram showing the configuration of an embodiment of the present invention;
FIG. 2 is an explanatory diagram showing the effect of FIG. 1, FIG. 3 is an explanatory diagram showing an example of an image obtained by the embodiment shown in FIG. 1, and FIG.
5 is a diagram corresponding to FIG. 1 of the conventional example, FIG. 5 is a diagram corresponding to FIG. 2 of the conventional example, and FIGS. 6(a) and 6(b) are diagrams corresponding to FIG. 3 of the conventional example. 11... Parts, 12... Board, 13.
...X-Y table, 14.15...Light source, 14a, 15a...Camera. 2i51 3Wi 4 Illustration 5 Ceramics 6 (a) (b)

Claims (1)

[Claims] 1. Component mounting inspection equipped with a light source unit that irradiates a board with a component mounted thereon with slit light from above, an imaging unit that captures an image of the board and the component, and a detection means that detects the mounting state of the component from the image taken by the imaging unit. The device includes two light sources that irradiate orthogonal slit light onto the substrate from diagonally above the substrate, and an imaging unit provided in each optical path of the slit light that reflects in the opposite direction at an angle equal to the angle of incidence on the substrate. A parts mounting inspection device characterized by: