JPH03183939A - Infrared-ray image inspecting device - Google Patents

Abstract

PURPOSE:To easily perform inspection even when a body to be inspected moves fast by driving an infrared-ray mirror which reflects infrared rays radiated by the body to be inspected at a speed corresponding to the moving speed of the body to be inspected. CONSTITUTION:The infrared rays 2 radiated by the body 1 to be inspected are reflected by the infrared-ray mirror 3 and then inputted to an infrared-ray camera 6. The mirror 3 is placed in repetitive following-up and returning opera tion by a mirror driving part 5 at the speed corresponding to the moving speed of the body 1 to be inspected detected by a speed detection part 4. Therefore, while the mirror 3 is in the following-up operation, infrared rays 2 radiated from the same position of the body 1 to be inspected are inputted to the camera 6 and an infrared-ray video signal which has no image run is obtained. This video signal is inputted to and stored in an image memory 8 through a video interface 7. Further, the following-up and returning operation of the mirror 3 is performed in synchronism with a vertical synchronizing signal supplied to the driving part 5 through a vertical synchronization part 10 and a processor 9 controls the interface 7 to input image data only in the following-up operation of the mirror 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an infrared image inspection apparatus that inspects the external appearance of an object to be inspected using infrared rays emitted by the object.

[Prior Art] FIG. 3 shows a conventional infrared image inspection apparatus of this type. In Figure 3, (1) is an object to be inspected that has a predetermined temperature and is moving, (2) is an infrared ray emitted from this object (1), and (6) is an input of this infrared ray (2). It is an infrared camera that creates an infrared video signal by
512 vertical rows of light-receiving elements are arranged two-dimensionally, and the vertical frequency is 60) (z). (7) converts the video signal output from this infrared camera (6) into digital image data. A video interface (8) is an image memory for storing image data output by this video interface (7), and (9) is an image memory (9) that performs manual control of image control and analysis processing of image data to this image memory (8). It is a processor that is equipped with various arithmetic processing functions and information storage and input functions. (Ill is a display unit that displays image data stored in the image memory (8).

Next, the operation will be explained. Infrared rays (2) emitted by the object to be inspected (1) are converted into infrared video signals by an infrared camera (6), converted into digital image data by a video interface (7), and input and stored in an image memory (8). A processor (9) analyzes the image data in the image memory (8) to perform an external appearance inspection of the object to be inspected (11), such as the presence or absence of defects.

[Problem to be Solved by the Invention] The conventional infrared image inspection device is configured as described above, and the infrared rays emitted by the object to be inspected are directly input to the infrared camera, so that the object to be inspected is When moving at high speeds, image blurring, which can be seen even with ordinary visible light cameras, occurs, making inspection difficult. In a normal visible light camera, the above problems can be solved by adding a shutter mechanism, but it is generally difficult to add a shutter mechanism to an infrared camera because it needs to receive minute infrared rays.

The present invention has been made to solve the above-mentioned problems, and aims to provide an infrared image inspection apparatus that allows easy inspection even when an object to be inspected moves at high speed.

[Means for Solving the Problems] In addition to the conventional device described above, an infrared image inspection device according to the present invention includes an infrared mirror that reflects infrared cotton emitted by a moving object to be inspected, and detects the moving speed of the object to be inspected. and a mirror drive section that drives the infrared mirror at a speed corresponding to the speed value output by the speed detection section, and an infrared camera is installed at a position where the infrared rays reflected by the infrared mirror are manually transmitted. .

[Function] In this invention, since the infrared mirror is driven by the mirror drive section at a speed corresponding to the moving speed of the object to be inspected detected by the speed detection section, the infrared camera can detect the same or both locations of the object to be inspected. Since infrared rays are manually applied for a certain period of time, it is possible to obtain infrared images that are easy to inspect without image blurring.

[Example 1 FIG. 1 is a diagram showing an embodiment of the present invention.

In Figure 1, +11, (2), f61~
(9) and (11) are exactly the same as the conventional device described above.

(3) is the infrared rays (2) emitted by the moving inspection object i11.
), and is a flat plate-shaped mirror that repeats the following operation and return operation in the moving direction of the object to be inspected (1) at a predetermined angle. (4) is a speed detection unit that detects the moving speed of the inspected object fl+, and (5) is this speed detection unit (4).
L infrared mirror (:
)) is a mirror drive unit that drives the mirror. (lO) transmits the vertical synchronization signal included in the video signal output from the infrared camera (6) to the mirror drive unit (5) and the processor (9).
This is a vertical synchronization section for supplying

In the infrared image inspection apparatus configured as described above, the infrared rays (2) emitted by the inspection object (11) are reflected by the infrared mirror (3) and then input to the infrared camera (6). 3), the mirror driving section (5) repeats the following and returning operations at a speed corresponding to the moving speed of the object to be inspected (11) detected by the speed detecting section (4). Therefore, the infrared mirror (3) While the inspection object (1) is being tracked, infrared rays (2) emitted from the same location on the inspection object fil are input to the infrared camera (6).

An infrared video signal without image blur can be obtained, similar to when the object (1) to be examined is dark. This video signal is input and stored in an image memory (8) where it is converted into digital image data at a video interface (7). A processor (9) analyzes the image data in the image memory (8) to perform an external appearance inspection of the object to be inspected (11), such as the presence or absence of defects.

On the other hand, the following operation and return operation of the infrared mirror (3) to the object to be inspected (11) are performed in synchronization with a vertical synchronization signal supplied to the mirror drive unit (5) via the vertical synchronization unit (1O), Video interface (
7), image data only when the infrared mirror (3) is in the tracking operation is input. FIG. 2 is a diagram showing an example of this operation timing. In Figure 2, (a
) is the vertical direction ! output from the vertical synchronization unit (lO). i11
(Timing of No. M, (b) is the operation timing of the infrared mirror (3) that repeats the tracking and return operation in synchronization with the timing (a) of this vertical synchronization signal, (C) is the image stored in the image memory (8) This is the human power timing of the pig.In this operation timing, the following operation of the infrared mirror (3) and the image data input to the image memory (8) are performed in one cycle of il'F + t'f. The processor (9) synchronizes with this vertical synchronizing signal (a) and performs the return operation in one cycle of the first order.
By performing manual image control once every cycle, it is possible to easily input an infrared image while the infrared mirror (3) is in a tracking operation.

[Effects of the Invention] As described above, according to the present invention, an infrared mirror that reflects infrared rays emitted by an object to be inspected, a speed detecting section that detects the moving speed of the object to be inspected, and a sensor that responds to the detected speed of the speed detecting section. The mirror drive unit that drives the infrared mirror at a speed of 4=1
In addition, by installing the infrared camera at a position where the infrared rays reflected by the infrared mirror are manually generated, it is possible to manually produce infrared images that are easy to inspect without image blurring even when the object to be inspected moves at high speed.

[Brief explanation of drawings]

FIG. 1 is a diagram of an embodiment of the infrared image inspection apparatus of the present invention, FIG. 2 is a diagram of an example of operation timing, and FIG. 3 is a diagram showing a conventional infrared image inspection apparatus. In the figure, (1) is the object to be inspected, and (2) is the infrared rays. (3) is an infrared mirror, (4) is a speed detection unit, (5) is a mirror drive unit, (6) is an infrared camera, (7) is a video interface, (8) is an image memory, and (9) is a processor. , (101 is the vertical synchronization section, (11) is the display section. (al is the timing of the vertical synchronization signal, (b) is the operation timing of the infrared mirror (3), and (C) is the input timing of image data. , the same reference numerals in each figure indicate the same or corresponding parts.

Claims (2)

[Claims] (1) An infrared mirror that reflects infrared rays emitted by a moving object to be inspected, a speed detection section that detects the moving speed of the object to be inspected, and the infrared mirror that moves at a speed corresponding to the speed value output by this speed detection section. an infrared camera that inputs the infrared rays reflected by the infrared mirror to create an infrared video signal; a video interface that converts the video signal output from the infrared camera into digital image data; An infrared image inspection apparatus comprising: an image memory that stores image data output from a video interface; and a processor that performs analysis processing of the image data stored in the image memory. (2) The infrared image inspection apparatus according to claim (1), wherein the mirror drive section is supplied with a vertical synchronization signal for driving the infrared mirror in synchronization with scanning of the infrared camera.