JPS63282640A - Automatic inspecting instrument for foreign matter in powder - Google Patents

Abstract

PURPOSE:To facilitate the discrimination of a foreign matter by providing a first optical fiber bundle from an upper direction, a second optical fiber bundle from a lower direction and a reflecting plate provided in an upper direction for illuminating a powder from its back side and emphasizing a contrast. CONSTITUTION:An inspecting instrument is constituted by first optical fiber bundles 8 and 8A, second optical fiber bundles 9 and 9A, a reflecting plate 10 and a camera 6. The optical fiber bundles 8 and 8A illuminate a powder 2 and a foreign matter 3 in a vial 1 from an upper direction. The optical fiber bundles 9 and 9A illuminate the thick portion of the powder 2 from a lower direction. Receiving a light from the optical fiber bundles 9 and 9A, the reflecting plate 10 illuminates the powder 2 and the foreign matter 3 from their back side. The illuminated portions are photographed by the camera 6. A contrast between the powder 2 and the foreign matter 3 is emphasized by using both a diffusion system and a transmission system regardless of the condition of the powder 2. Thus, the mixed foreign matter can be easily and surely detected.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention automatically removes foreign matter by using the difference in contrast between a nearly white powder when illuminated and a nearly black solid foreign matter mixed into this powder. This invention relates to an automatic inspection device for detecting particles in powder.

(Prior Art) Fig. 3 is a schematic diagram of a conventional foreign matter inspection device in powder. In the figure, 1 is, for example, Via A Albin, and the spout 1
A powder 2 that is almost white in color is contained in the liquid.

3 is a nearly black solid foreign substance mixed into the powder 2. A lighting device 4.4A is placed in front of (upward) the powder 2, and illuminates the powder 2 through a diffuser plate 5.5A.

A camera 6 is provided above the powder 2, and a lighting device 4.
4A, the foreign matter 3 can be identified by the difference between the powder 2 with high diffusivity and the foreign matter 3 with low diffusivity.

(Problems to be Solved by the Invention) However, in such a detection device, depending on the state of the powder 2 and how it gathers, shadows are produced in the image taken by an image processing device (not shown) that uses the camera 6, and it may be difficult to identify foreign objects. There was a problem that it was difficult to distinguish between

As shown in FIG. 4, light diffusion is reduced in the area A where the powder 2 is handled, and a shadow is created in the image 7 that is subjected to image processing 8, making it difficult to distinguish it from the foreign object 3. In addition, there was a problem in that the foreign matter 3 buried in the powder 2 was slightly removed. Note that since only the foreign matter 3 that appears above the powder 2 is visible, the vial 1 must be rotated! However, foreign object 3
on the surface? It was necessary to raise the price by 7 years. 8. In addition, this inspection device has a space Kj occupied by the illumination devices 4 and 4A, and a space shown in the figure 8 which is designed for transporting the vial 1.
It was difficult to load and fix the material onto the conveyor Kr15 that had not been installed.

In view of the above-mentioned points, Kikomei has effectively solved the problems of the conventional technology, and the detection is clear and reliable, the handling is easy, and the product is small. The purpose of the present invention is to provide an automatic inspection device for foreign substances in powder to be processed.

(Means for solving the problem) In order to achieve this purpose, we will examine the near-white powder and the near-black solid foreign matter mixed in this powder from above. The first light source illuminates the powder and foreign matter.
an illumination means, a second illumination means for illuminating the powder and foreign matter from below, and a second illumination means provided above the powder and foreign matter for illuminating the powder and foreign matter from below;
= J and a reflecting plate that transmits the powder and foreign matter; the foreign matter is detected by the difference in the transmittance of the powder and foreign matter by the first illumination means, and the powder and foreign matter are detected by the second illumination means. The contrast of the foreign matter is produced by the difference in diffusibility of the powder and the foreign matter by illumination from behind the powder and the foreign matter by the q.1 plate.

(Function) By using such technical means, the part where the powder is removed will be brighter because the illumination is transmitted through it, and the part where the powder is thicker will be diffused and brighter, and the contrast of the tribute will be improved regardless of the state of the powder. can be obtained reliably and effectively.

(Example) Next, an example of the present invention will be described in detail based on the drawings.

FIG. 1 is a schematic 18 block diagram of an embodiment of the present invention, and FIG. 2 is a schematic explanatory diagram of 33 processed images in FIG. 1. In Figures 1 and 2,
Parts that have the same functions as those shown in the figures are given the same reference numerals +J. The automatic inspection device 20 for foreign substances in powder mainly includes a lighting device (in this embodiment, an optical fiber 8.8A), other lighting devices (in this embodiment, a light) 71 fiber 9.9A, and a reflection plate 1.
0 and a camera 6. Of these, the Hikanoaiba 8, 8A is the powder 2J in the vial bottle 1 from above.
Illuminate j and foreign object 3. Camera 6 is optical fiber 8°8
Illumination from the optical fiber 8.8A placed on the opposite side of A and transmitting the powder 2J3 and three foreign objects is carried out.

The optical fibers 9 and 9A are arranged on the opposite side from the optical fiber 8.8A, and a part of the light is diffused by the B powder 2 or the foreign object 3 and transmitted to the camera 6.

Further, the reflection plate 10 is disposed on the same side as the optical fiber 8.8A, and reflects the light from the optical fiber 9.9A, illuminates the powder 215 and the foreign object 3 from behind, and provides a positive image to the camera 6. .

The automatic foreign matter inspection device 20 configured in this manner places the camera 6 on the opposite side of the optical fiber 71 and the fibers 8, 8A, and shines light toward the medium heat of the powder 2 mainly through the optical fiber 8.8A. As a result, as shown in FIG. 2, the part A of the powder 2 is transmitted through, and the shadow is removed from the image 7, making it brighter. Further, the illumination of the optical fiber 9° 9A is applied to the thick part of the powder 2 or the surrounding shadow part, and is diffused to remove the shadow from the image 7 and brighten it. Note that the reflector 10
uses the illumination to the optical fiber 9.9 to illuminate the powder 2 from behind, making the image 7 even brighter. Therefore,
Regardless of the state of the powder 2, the contrast between the transparent and diffusible powder 2 and the transparent and non-diffusible foreign object 3 can be emphasized, making it easy to identify the foreign object 3 and ensure reliable inspection. obtain.

The powder 2 contained in the vial 1 is homogenized by λ9 while avoiding rotation of the vial 1, and then passed through the optical fiber 8.
By applying strong lighting of 8A and 9.9A,
The foreign matter 3 can be effectively removed from the second part 1 to the last part 1. At this time, determine how many times the powder 2 rotates with the full bottle 1 into the bin f'? I especially want to make inspection of objects more reliable.
That's a monkey.

Furthermore, the 8,8△ yukufu iba as illumination means.

9.9AJ> and the reflection plate 10 are applied, the inspection 120 is made more compact and can be easily installed in the vial transport device.

(Effect of the North Gate) As explained above, if J and J are present, the first optical fiber from the -F direction of the powder and foreign matter, the second optical fiber from the downward direction, and the The problems of the prior art are effectively solved by providing a plate from behind the powder and foreign matter, and the diffusion method and the penetrating power method are This allows for easy and reliable detection of mixed foreign substances regardless of the state of the powder, and the advantages include the fact that this device is compact8 and can be easily installed in a vial bottle conveying device. play.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of Tribute #4 of one embodiment of Mokuhoku Gate, Figure 2 is an image processed image in Figure 1 (schematic illustration of an elephant,
Figure t is a schematic ff8 conjunctive diagram of a conventional automatic foreign object detection device, No. 4.
The figure is a schematic explanatory diagram of the image in FIG. 3. 1: Pycelbin, 2: Powder, 3: Foreign matter, 6: Camera,
8.8A, 9.9A: Optical fiber, 10; Reflector, 2
0: Automatic foreign matter detection device in powder. Special applicant: Fuji Electric Co., Ltd. Patent attorney: Takehito Yokoya/, 9.
',. Figure 2 Figure 4

Claims (1)

[Scope of Claims] 1) A first illumination means for illuminating an almost white powder and an almost black solid foreign matter mixed in the powder from above, and a first illumination means for illuminating the powder and foreign matter from above; a second illumination means for illuminating the powder and the foreign matter; and a reflecting plate provided above the powder and the foreign matter to reflect the light from the second illumination means and transmit the powder and the foreign matter; The foreign matter is detected based on the difference in the transmittance of the foreign matter, and the contrast of the foreign matter is detected by the difference in the diffusivity of the powder and the foreign matter by the second illumination means and the illumination from behind the powder and the foreign matter by the reflector. An automatic inspection device for detecting foreign substances in powder. 2) In the inspection device according to claim 1,
1. An automatic foreign matter inspection device in powder, characterized in that an optical fiber is used for the first illumination means or the second illumination means.