JPS5850453A - Inspection system of article - Google Patents

Abstract

PURPOSE:To form a composite image without joint for inspection of a large object by an image processing of detection signals from a plurality of detectors based on signals of an inspection object movement detector when article in transit detected therewith by irradiation of X rays. CONSTITUTION:A conveying equipment 2 is operated through a console 4 and a controller 3 to move an object 1 to be inspected to the inspection position, where X rays are irradiated thereon from an X rays generator 5. The X rays are detected with a detector block 32 in which a plurality of X rays detectors 31 are arranged and processed with an image processor 33 to be indicated on a display unit 34. The image processing is performed synchronizing the input of the inspection image by detecting the movement distance of the inspection object with an inspection object movement distance detector 36. Images are inputted from the detectors 31 in the orders as shown by 1, 2, 3.... Images inputted are memorized into corresponding positions of a pattern memory in the processor 33 to form a jointless image as the full composite picture.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a system that streamlines and saves labor in the inspection and identification work of large articles during production or distribution processes.

Conventionally, this kind of equipment is shown in Fig. 1. In Fig. 0, fil is the object to be inspected, (2) is the conveyance equipment, and (31) is the inspection object.
is the transport equipment (2+ control device, (41σ operation vehicle υ,
The inspection article (11) can be moved to a predetermined inspection position via this console (4). (5) is an X-ray generator, f6
The image of the inspection object (1) obtained by X-ray irradiation sent from the X-ray generator (5) via the operation console (4) is an X-ray fluorescent display device. Fluorescent display device (6)
K can be displayed.

Next, the operation will be explained in detail. First, the staff operates the transport equipment (2) via the operation console (41) and control device (3) to move the inspection object (1) f to the predetermined inspection position #.Next, the operation console (4) Instructions or control device given by staff +
31 Inspection position arrival detection signal K of inspection article (1) by K
x', pX-rays are sent out from the X-ray generator ar f5+. When these X-rays are irradiated onto the inspection object (11), the intensity of the X-rays that reach the
9 Display device (6) K, is this X-ray your eyes? J! It is converted into possible light. The result display device (61) displays an X-ray perspective view of the inspection object (1).Furthermore, when information collection for the inspection is completed.

Operation console (41 operations or control devices) at the discretion of the staff
31, the inspection article (1) is transferred to the next process.

The staff member visually inspects the hk diagram displayed on display # (6).

By making judgments based on experience, it becomes possible to detect the presence of foreign substances in the object (1) to be inspected without dismantling the article (1) or changing its packaging.

Also, if the fi+ to be inspected is a large container (e.g. 24m high)
x Width 24m x Length 12m)
There is a limit to the size of the generally available X-ray display device (6), and a large X-ray generator that can cover the entire inspection object (1) with one irradiation is not practical. Because there is no such thing.

If a large inspection object (+l f) is normally inspected using a system with the system configuration shown in Figure 1, which includes 11 XS generators (5) and one Xa fluorescent display device (6111),
To see a large area with a small field of view.

Either move the combination of the X-ray generator (5) and the X-ray fluorescent display (6) (so that they do not move relative to each other) or Written inspection target (11 and X-ray generator (5) and X11i
i! Line connecting fluorescent display device (6) #l'2 diagram ++3+
It is necessary to perform the inspection so that the trajectory of the (irradiated field of view 02) is as shown in Fig. The disadvantage of the price inspection system is that of conventional inspection equipment.
There was.

In order to solve the above-mentioned shortcomings, we took the idea one step further and installed multiple X-ray fluorescent display devices + 61 fr #(
Inspection object (1) When moving completely horizontally, install multiple xm sensors at right angles to the direction of movement. A method of moving the inspection object f (horizontally) and sequentially capturing the images into memory to capture the entire image of the inspection object (1), and displaying it on a separate display device # for inspection later. However, the drawback of this method is that the effective detection field of view of each sensor (41) is 311.
The invalid field of view (c) such as Iz creates a range that cannot be inspected as a discontinuous part (seam) of the entire image (Fig. 3).

Conventional inspection of goods relies on the above-mentioned VC configuration, so a simple gray-scale image display or, in the case of inspection of a large object to be inspected, a set of X-ray generator and X-ray fluorescent display as shown in Figure 2. This may be due to the long distance movement of the equipment relative to the inspection target, long hours of work due to wide range inspection using a simple X-ray fluorescent display and arrangement (Figure 3 A), or the fact that there are areas that cannot be inspected. There were many shortcomings such as the inspection department.

In order to eliminate the drawbacks of the conventional ones as described above, this invention is based on [3, 77-], in which the X-ray detector required to cover a large area is installed in the direction perpendicular to the moving direction of the inspection object fl+. The effective detection parts of adjacent X-ray detectors are arranged so that they are not stacked together and there are no gaps (so that they are in contact with each other),
The inspection is performed by capturing the entire inspection image in synchronization with the movement of the inspection object so that the detection range of each XIviI sensor is exactly in contact with the detection timing of the front shoulder, making the entire large composite screen an image with no seams or gaps. The purpose of this invention is to provide a system that eliminates the need for image-based inspections and ineffective areas.

Examples of the present invention will be described below.

In Figure 4, CIl+ is one X-ray detector, (to)
is a detector group in which a plurality of X-ray detectors ci11 are arranged as shown in FIG. , (to) is a processing electronics that performs image processing and other processing on the video signal from the Xi detector, and 0
A display device that displays 41 image processing results.

Cl51 is various peripheral devices (e.g. printer, etc.), (to)
is a distance detector that detects the moving distance of the transport device #C21 to be moved by the inspection object (1) f. (11(21(31(
41f5) This is the same as mentioned above.

When inspecting large objects using X-ray fluoroscopy.

X-ray strength and penetrating power), dose (number of particles - related to image quality), and X-ray spread (radiation) angle (this is due to shape distortion of objects with depth in the direction of X-ray emission - near the X-ray source) Since the inspection ability is affected by There is a most practical size for each type, subject to size limitations (electrical conversion/electrical conversion). When performing a fluoroscopic inspection of a large article using these inspection devices of limited size (a combination of an X-ray generator (5) and an X-ray detector f311), a set of inspection devices t is used as shown in Figure 2. Either move the KX-ray detector so that it covers the entire surface of the object to be inspected, or place the K Move it in a direction perpendicular to this (H direction) (on the contrary, you can also move the fixed inspection device) and divide it into several times as shown in Figure 3 (■, ■, ■ indicate the number of times). There are two ways to do this: to inspect each item individually, or to combine ① to ② and view them as a whole later. The method of FIG. 2 is too time consuming to be practical. The problem with the method shown in Figure 3 is that if the entire X-ray detector is like the sensitive part (effective part) Q]), it is impossible to create a seamless overall image as shown in Figure 7. Although it is simple, since the X-ray detector generally has strength, the effective part C1l+ is surrounded by the frame VC. Since this causes an invalid and uninspectable field of view at the opening in Figure 3, we decided to arrange the X-ray detectors as shown in Figure 5 (a) and store the images of each detector in the image memory as shown at the opening in Figure 5. In order to invent a method to obtain an entire image without any seams, let's briefly explain the case where the effective part of 0 (for inspection equipment) is a rectangle of pxq. ~
6) The effective fields of view (21) of adjacent detectors are placed at a position where they are in contact with each other. In this case, there is no need to specify the distance between the nine rows as long as the rFi frames intersect and there is a sufficient distance.

Now, the nostem configuration of the entire inspection device is as shown in Figure i@4. The operation of this diagram rC will be explained.

In order to create a composite image with complete VC joints in the lateral (horizontal--inspection object movement) direction of the figure as shown in FIG. 5, it is necessary to synchronize the input of the inspection image and the movement of the inspection object. As shown in Fig. 4 (also Fig. 1l-j, Fig. 8), a method for achieving this synchronization is to attach a moving distance detector to the conveying device that moves the inspection object, and measure the moving distance in the horizontal direction - the screen of the previous layer. Either make the input pitch PK as shown in Fig. 5, or keep the moving speed of the transport device constant so that the input pitch in the horizontal direction - PKf
There are two methods, one is to time the processing device to input the information on the screen, and the explanation in this specification will focus on the former.

As shown in FIG. 8, the X-ray irradiation range covers the entire 2 rows and 6 stages. The screen inputs from each detector Cl1l are shown in Figure 5.

■ The order shown is... If these input images are determined in advance and stored in a corresponding portion of the pattern memory of the processing device tc13, the two composite images will be a seamless overall surface. The image information to be stored in the pattern memory includes two copies: the address of the pixel constituting each screen f, and the 11 degree information of each pixel h.

After that, various image processing is performed based on the information stored in the pattern memory. Distortion compensation for one screen, noise cancellation, and image enhancement processing are performed.
-Example Binarization 9 Contour emphasis, pseudo color display, smoothing processing-
After processing the enlargement by 9 fl-minutes, the image display C341
Display K, fully assist the inspector in making decisions, various contents wJ inspection,
Subject to inspection? It is possible to perform VC inspection without having to open it and take out the contents, resulting in significant automation and labor savings.

In the above embodiment, adjacent detectors (31) are used as shown in FIG.
The VCs were arranged so that the underlines were in contact with each other above the effective field of view, but the Vs were placed so that they only crossed from the bottom of the effective field of view C11l between each stage. When entering the valley painting area.

A seamless whole screen can be synthesized in the same way by determining and storing addresses in the memory so that the area shown by the broken line in the figure becomes a tangent line.

As described above, according to the present invention, the overall system is configured as shown in FIG. 4, and the arrangement of the X-edge detectors is configured as shown in FIG. A seamless composite image can be created in a short time using the Xi detector RC, and fluoroscopic inspection of the entire overlooked curve can be performed in a short time.
It is possible to achieve an improvement in inspection speed by increasing the degree of inspection.

[Brief explanation of the drawing]

Figure 7 is a diagram of a conventional article inspection system, Figure 2 is a three-dimensional diagram showing how a set of inspection equipment performs a fluoroscopic inspection of a large inspection object, and Figure 3 A is a conventional multiple X-ray detector. Figure 4 is a system configuration diagram of the invented article inspection device, and Figure 5 A is a layout diagram of the invented X-ray detector. Figure 6 shows the procedure for inputting images using the X@detector and a composite diagram; Figure 8 is a three-dimensional diagram showing the inspection status of the main inspection area, Figure 9 is a layout diagram when inspecting all large-sized inspection objects by arranging multiple units with only the effective field of view. This is another embodiment in which a plurality of X-ray detectors are arranged to obtain a composite image. The code (1) in the figure is the inspection target, (21 pieces of transport equipment, (5 pieces of
) (11) iX-ray generator, O]) σχ-ray detector, (33+ is image processing device, 041 is display device, G51 is peripheral device 1
The can is a distance detector. Agent Shin Kuzuno - (12) Figure 3 A (32) Roy (32)
) Figure 4 Figure 6 Figure 7 A
Letter of amendment to procedures in Figure 8 Figure q (voluntary) Mr. Commissioner of the Japan Patent Office■, Small case indication Patent Application No. 56-149246 2, Title of invention Article inspection system 3, To the representative of the person making the amendment Hitoshi Katayama Part 5 , the column for detailed description of the invention in the specification to be amended, and the drawings. 6. Contents of amendment (1) The "number of times" on page 7, line 15 of the specification is corrected to "order." (2) Correct "-an example" in the negative first line of No. 10 to "(example:"). (3) Correct "smoothing process-" in the second line of page 10 of Doho to "smoothing process." ” he corrected. (4) In the 10th negative line of Douyo No. 10, correct "from the top and the underline" to "the top and the underline are S". (5) Figures 2 and 5 of the drawings shall be revised as attached. that's all

Claims (1)

[Claims] Equipment used in the production and distribution process of goods, including means for transporting the goods, means for generating energy waves that can pass through the inside of the goods, and means for generating energy waves that can pass through the inside of the goods. A plurality of detectors that detect the energy level, a movement distance detection device for the inspection object that determines the input timing of the detection surface of this detector, and an output signal from this detection device that generates a synchronized sound based on the signal from the movement distance detection device. and an image processing device that inputs the image information into an image memory and performs predetermined image processing, and the grayscale signals of image information indicating the transmission characteristics of the article are all processed by the processing device, thereby disassembling the article. An article inspection system characterized in that the article is inspected or identified without changing its packaging.