JPH06160038A - Inspection device for solid shape object - Google Patents

Abstract

PURPOSE:To shorten the inspection processing time and minimize the device size by taking the optical image of a solid shape object with a plurality of optical systems from a plurality of directions and supplying photoelectric conversion means with these optical images as optical image for one screen. CONSTITUTION:An illuminator 12 illuminates an inspection object 1. A plurality of photographing means photographing the optical images of the object 1 from a plurality of directions A to C are placed, which are constituted of lenses 18 to 20 and optical fiber guides 21 to 23 for guiding the optical image taken with a TV camera 24 through each lens. By receiving the optical image transmitted through the optical fiber 21 to 23, the camera spreads and stores the photographed images of a multitude of directions on a memory and unify them on a screen. The image converted from optical image to electric signal by the camera is transmitted to a processing device 25 and used for the inspection. The unified screen consists of three partial screens and the arrangement of partial screens can easily be changed by changing the order of the guides 21 to 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional object inspection apparatus which images a three-dimensional object and inspects the imaged result.

[0002]

2. Description of the Related Art Typical examples of conventional inspection systems for three-dimensionally inspecting an object are shown in FIGS. In FIG. 4, the inspection object 1 is conveyed by the conveyor 2 in the arrow direction. At the inspection station 3, the inspection object 1 is aligned by the aligner 6 so that the observation direction with respect to the inspection object 1 is the direction A in FIG. 5, and the TV camera 9 captures an image of the object 1 illuminated by the illuminator 12. To do. The imaging result is sent to the arithmetic unit 15, and the inspection using the image processing is performed in the arithmetic unit 15.

Similarly, in the inspection station 4, the inspection object is aligned and inspected by the aligner 7 in the observation direction B of FIG. Further, the inspection station 5 performs the inspection from the observation direction C in FIG.

[0004]

When the same three-dimensional object is to be inspected from multiple directions, inspections (stations) must be installed for each observation direction, which causes the following problems. 1) The entire inspection device becomes large-scale and the equipment cost becomes high. 2) The space for installing the inspection device becomes large.

3) The inspection time increases. Therefore, in view of the above points, an object of the present invention is to provide an inspection apparatus for a three-dimensional object that solves the above problems.

[0006]

In order to achieve such an object, the invention of claim 1 provides a plurality of optical systems for obtaining optical images of a three-dimensional object to be inspected from a plurality of directions,
It comprises photoelectric conversion means for converting an incident optical image into an electric signal, and light propagation means for supplying the optical image obtained by the plurality of optical systems to the photoelectric conversion means as an optical image for one screen. Characterize.

According to a second aspect of the present invention, an image pickup device and a mirror for projecting an optical image of a three-dimensional object to be inspected viewed from multiple directions on the image pickup device by changing a reflection angle are provided as a set. And a plurality of image pickup means and an image processing means for integrating the image pickup results of the plurality of image pickup means into one screen.

[0008]

According to the first and second aspects of the present invention, the image of the entire surface of the inspection object can be integrated into one screen, and the inspection processing can be performed collectively.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. <First Embodiment> FIG. 1 shows the arrangement of an image pickup system in the first embodiment. In FIG. 1, the illuminator 12 illuminates the object 1. A plurality of image pickup means for picking up an optical image of the object 1 from the directions corresponding to the directions A, B, and C in FIG. 5 are installed. The image pickup means is a lens (optical system of the present invention) 18 to 20 and an optical image obtained through each lens is the television camera 2.
Optical fiber guide (light propagating means of the present invention) 2 which leads to 4
It is composed of 1 to 23.

TV camera (photoelectric conversion means of the present invention) 2
4 receives the optical images transmitted through the optical fibers 21 to 23 to integrate the imaging screens in multiple directions into one screen. The image converted from the optical image to the electric signal by the television camera 24 is transmitted to the processing device 25 and used for inspection. In this example, the integrated screen 26 is an integration of three partial screens, and the arrangement of the partial screens can be easily changed by changing the arrangement order of the optical fiber guides 21 to 23 in front of the television camera 24.

<Second Embodiment> FIG. 2 shows the arrangement of an image pickup system according to the second embodiment. In FIG. 2, the mirror 50 is driven by a movable mechanism (not shown) that changes the reflection angle, and an optical image of the object 1 viewed from a plurality of directions centering on the C direction is mainly used as a line image sensor (via a lens 51). The image is projected onto the image pickup means of the present invention. Similarly, the above-mentioned optical system and the image pickup means are installed also in the A, B, and D to F directions. Note that, for example, when the crossing angle in the C and F directions is small, that is,
When the surface of the object 1 can be imaged with one mirror, it is needless to say that the surface of the object sandwiched by the mirror and the line image sensor in the C and F directions can be imaged.
The image signals thus acquired by the plurality of image sensors are integrated into one screen by the image processing device. A well-known method can be used for this integration processing. As an example, as shown in FIG. 3, the integration of the screen 26 can be realized by expanding and storing a plurality of imaging results 30 to 35 in the memory.

[0012]

As described above, according to the present invention,
Since the surface of the measurement target is integrated into one screen, the initial processing that was conventionally performed for each inspection processing is 1 in this embodiment.
The inspection processing time is shortened by the number of times. In addition, the alignment mechanism is not required, and the inspection device is downsized and simplified.

[Brief description of drawings]

1A and 1B show an embodiment of the present invention, FIG. 1A is a configuration diagram showing a system configuration, and FIG. 1B is an explanatory diagram showing an example of integration of imaging results.

FIG. 2 is a configuration diagram showing a system configuration of Example 2 of the present invention.

FIG. 3 is an explanatory diagram showing an example of integration of image pickup results.

FIG. 4 is a configuration diagram showing a system configuration of a conventional example.

FIG. 5 is a perspective view showing an imaging direction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Object 2 Conveyor 3-5 Inspection station 6-8 Aligner 9-11 TV camera 12-14 Illuminator 15-17 Computing device

Claims (2)

[Claims] 1. A plurality of optical systems for acquiring optical images of a three-dimensional object to be inspected from a plurality of directions, photoelectric conversion means for converting an incident optical image into an electric signal, and the plurality of optical systems. An inspection apparatus for a three-dimensional object, comprising: a light propagation unit that supplies the obtained optical image as an optical image for one screen to the photoelectric conversion unit. 2. A plurality of image pickup means including an image pickup device and a mirror for projecting an optical image of a three-dimensional object to be inspected, which is viewed from multiple directions, onto the image pickup device by changing a reflection angle. And an image processing unit that integrates the image pickup results of the plurality of image pickup units into one screen.