JPH1099795A - Defect detector and defective removing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly detect foreign matter and defects whose transmissibility is larger than that of normal objects to be inspected and to surely separate and remove the foreign matter and the like from the normal objects to be inspected. SOLUTION: A group of granules are taken as objects to be inspected. The planned presence place of the objects to be inspected is illuminated and the transmitted light by them is received. When the received quantity thereof is between the upper limit UL and the lower limit LL of a proper light quantity range ΔEt for the granules, the presence e0 of the normal granules is determined. Between the upper limit UL of the proper light quantity range ΔEt and the received light quantity Es when the illuminating light is directly received, a judgment level UL1 on the bright side is set. When the received light quantity is between the upper limit UL of the proper light quantity range ΔEt and the judgment level UL1 on the bright side, the presence e4 of defective granules or foreign matter whose transmissibility is larger than that of normal granules is determined.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to illuminating means for illuminating a predetermined existence position of an inspection object using a group of granular materials as an inspection object, and illuminating light from the illuminating means passing through the predetermined existence position. A defect provided with a light receiving means for receiving the transmitted light, and a discriminating means for discriminating the quality of each granular material in the granular material group or the presence or absence of a foreign substance mixed in the granular material group based on light receiving information of the light receiving device; The present invention relates to a detection device and a defect removal device that removes a defective granular material or foreign matter detected by the defect detection device.

[0002]

2. Description of the Related Art In the above-described defect detecting apparatus, as shown in FIGS. 8 and 9, for example, when a group of granules made of, for example, rice grains k is transported along a predetermined path and arrives at an expected existing point, that is, an inspection position, the path sideways. The light is illuminated from the direction by a light source Lg, which is an illuminating means. The illuminating light from the light source Lg receives the transmitted light transmitted through the rice grain group by a light receiving means Ps such as a photo sensor. If it is within the above appropriate range Δe, it is determined that the rice grain k is normal. On the other hand, if it is below the lower limit value ek, it is determined that defective k ′ such as colored rice grains and foreign matter such as stone and plastic are mixed. Was.

[0003]

That is, in the above-mentioned prior art, when there is no inspection object such as rice grains, the light receiving means Ps receives the illumination light from the light source Lg without passing through the inspection object. Since the light receiving level becomes a high value, it is possible to assume an upper limit value of the proper setting range Δe for a normal inspection object. However, if the upper limit value is actually set, the inspection object is not present. When the illumination light is received, it is erroneously determined that there is a foreign substance or the like having a transmittance higher than that of a normal inspection target. As a result, the presence of a foreign substance or the like having a transmittance higher than that of the normal inspection target is appropriately determined. There was a disadvantage that it could not be detected. As a specific example, when “Uruchi Rice” is a normal test object, “Glass” corresponds to a foreign substance having a higher transmittance than “Uruchi Rice”,
When "sticky rice" is used as a normal inspection target, "sticky rice" and "glass" correspond to foreign substances having higher transmittance than "sticky rice".

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to solve the above-mentioned disadvantages of the prior art by detecting the presence or absence of a foreign substance or a defective substance having a transmittance higher than that of a normal inspection object. Is to be properly determined, and based on the detection result, a defective or foreign substance mixed in the inspection target can be reliably separated and removed from the normal inspection target.

[0005]

According to the first aspect of the present invention, the planned existence position of the group of granular materials as the inspection object is illuminated by the illumination means, and the illuminating light is transmitted light transmitted through the planned existence position. Light is received by the light receiving means, and when the light receiving amount of the light receiving means is between the upper limit value and the lower limit value of the appropriate light amount range for the granular material, the presence of the normal granular material is determined, and the light receiving amount of the light receiving means is When the light-side judgment level set between the upper limit value of the appropriate light amount range and the received light amount when the illumination light is received without passing through the inspection object and the upper limit value of the appropriate light amount range In addition, the presence of a defective granule or a foreign substance having a transmittance higher than that of a normal granule is determined.

Accordingly, a determination level is provided on the side brighter than the upper limit of the appropriate light amount range for a normal granular material, and information on the amount of light received for the bright side determination level and the upper limit of the appropriate light amount range is used. In addition, it is possible to obtain a defect detection device that can appropriately detect the incorporation of a defective granular material having a transmittance higher than that of a normal granular material.

According to the second aspect, in the first aspect, when the light receiving amount of the light receiving means is smaller than the lower limit value of the appropriate light amount range, defective granular material or foreign matter having a transmittance smaller than that of a normal granular material. The presence is determined.

[0008] Therefore, in addition to being able to detect a defective substance having a transmittance higher than that of a normal granular material, for example, colored rice in the case of a group of rice grains and a substance that does not transmit light, such as stones and plastics, are normally detected. Since it is possible to detect by detecting that the transmittance is smaller than that of the granular material, it is possible to detect the mixing of various kinds of defectives out of the appropriate light amount range with respect to the normal granular material, so that the defect detecting device according to claim 1 is suitable. Means can be obtained.

According to a third aspect of the present invention, in the first or second aspect, the transmitted light transmitted through the scheduled existence position of the inspection object can receive light-receiving information separately, and can be obtained over the entire planned existence position. Light is received by a plurality of light receiving units provided,
In each of the light receiving units, a light receiving unit in which the amount of received light is smaller than the bright side determination level and larger than the upper limit value of the appropriate light amount range is obtained, and the obtained continuous number of the light receiving units is the set number. Is determined to be a defective granular material or a foreign material having a transmittance higher than that of a normal granular material.

[0010] Therefore, while the transmitted light transmitted through the predetermined existence location by the plurality of light receiving portions is relatively finely received in a limited range, the amount of transmitted light transmitted through the granular material from the central portion where the thickness is large is increased. In the case where the thickness becomes larger as the thickness becomes smaller, the number of light receiving portions smaller than the light-side determination level is usually larger than the number of light receiving portions larger than the upper limit of the appropriate light amount range. The number of light-receiving sections detected at the light-side determination level and the upper limit of the appropriate light amount range is slightly different, and as a result, the light-side determination level is higher than the light-side determination level corresponding to the edge of the inspection object. Even if the number of light receiving sections that are small and larger than the upper limit value of the appropriate light amount range are adjacent to each other in a small number,
The continuous number does not exceed the set number, and it is possible to avoid being erroneously determined to be a defective granular material or a foreign material having a higher transmittance than a normal granular material. Suitable means for such a failure detection device is obtained.

According to a fourth aspect, in the third aspect, the light receiving amount of the light receiving portion is smaller than the bright side determination level.
Value information and binary information in which the amount of light received by the light receiving unit is larger than the upper limit of the appropriate light amount range, and the amount of received light is smaller than the determination level on the bright side and the appropriate light amount range is calculated. The light receiving unit which is larger than the upper limit of is determined.

Therefore, the light receiving amount of the light receiving unit is smaller than the bright side determination level and larger than the upper limit of the appropriate light amount range by using multi-value information instead of such binary information. When the light receiving unit is obtained, the disadvantage that the processing time becomes long or the control configuration of the process becomes complicated can be appropriately eliminated because the amount of information to be subjected to the determination process is large. Preferred means of the defect detection device according to claim 3 is obtained.

According to a fifth aspect of the present invention, there is provided the defect detecting device according to any one of the first to fourth aspects, wherein the particle group which is the inspection object transported along the predetermined transport path is light receiving means. When transferred to the light receiving position, that is, the planned existence location,
Illumination light from one side of the planned transfer path is transmitted through the planned existence location and received on the other side of the planned transfer path, and the defective granular material determined based on the light receiving information of the light receiving means; The foreign matter is separated and transferred to a path different from the path of the normal granules in the group of granules.

Accordingly, for example, in order to detect the defect and remove the defect without transferring the inspection object (granular body group),
In contrast to the necessity of making the apparatus side movable, the inspection object (granular body group) is sequentially moved from the light receiving position of the light receiving means, that is, the defect detection position, to the separation position on a different path, that is, the defective object removing position. By transferring the defective and foreign matter separately from the normal granular material while transferring,
It is possible to obtain a defective object removing device which can realize a smooth operation by arranging each part of the device rationally while keeping the device side from moving.

According to the sixth aspect, in the fifth aspect, the inspection object being transported in a single layer and a plurality of rows along the predetermined transport path is illuminated in the full width in the arrangement direction, and Light is received by the light receiving means along the arrangement direction with the entire width thereof as a light receiving range, and based on the received light information, the quality of the granular material or the presence or absence of a foreign substance in the entire width in the arrangement direction of the inspection object in a plurality of rows is determined. .

Therefore, it is possible to detect a defect in parallel, that is, with high efficiency, in the entire width in the arrangement direction as compared with, for example, a case in which inspection objects (granular bodies) are transported in a single line state instead of a plurality of lines. Thus, a preferable means of the defect removing apparatus according to claim 5 can be obtained.

According to the seventh aspect, in the fifth or sixth aspect, the particles to be inspected are dropped under their own weight and transported, and the defective particles or foreign matter in the group of particles are removed. Air is blown, and the defective granular material or foreign matter is separated from the transfer path of the normal granular material.

Therefore, the separation of the defective granular material or foreign matter from the normal transporting path of the granular material is performed by the blowing action of air. Therefore, for example, direct contact is made by mechanical means such as a plate that moves in and out. As compared with the case where the soft touch is separated, the separation can be performed satisfactorily with a high response speed and without a risk of damaging the soft touch. Therefore, a preferable means of the defective object removing device according to claim 5 or 6 is obtained.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a defect detecting apparatus and a defective object removing apparatus according to the present invention will be described in detail by transferring a group of rice grains, such as brown rice, as a test object along a predetermined path. A case of performing detection and removal of a defective will be described with reference to the drawings.

As shown in FIGS. 1 and 2, a plate-shaped shooter 1 having a predetermined width is formed at a predetermined angle (for example, 60 degrees) with respect to a horizontal plane.
The rice grain group k supplied from the storage hopper 7 provided on the upper side of the chute 1 is slid and transported in a state in which the rice particle group k is further spread in the lateral direction. Below the shooter 1, a good rice collection box 2 for collecting normal rice grains k of a group of rice grains k naturally falling from the lower end of the shooter at a predetermined speed, and a colored rice (burnt rice) separated from the flow of normal rice grains k ) And a defective product recovery box 3 for recovering defective rice such as broken rice or foreign matter such as stone or glass fragments. As described above, the chute 1 further moves the rice grain group k as the inspection target along the scheduled transfer path (that is, the flow path of the rice grain group k on the chute and the falling path of the rice grain group k jumping out from the lower end of the chute) and The transfer means H is configured to transfer a plurality of rows.

The hopper 7 includes a shooter surface 1a using an upper portion of the shooter 1, an inclined side surface 7a facing the shooter surface 1a and inclined to the opposite side,
The side wall portion 7b and the upper wall portion 7c for surrounding the entire circumference form a cylindrical body tapering toward the lower end as viewed in a direction perpendicular to the paper surface of FIG. In order to discharge the rice grains k in the hopper 7 to the shooter 1, a linear gap along a direction perpendicular to the paper surface of FIG.
And the opening and closing gate 9A formed between
A gate drive motor 9B and other mechanisms for changing the gap by moving A are provided. A level sensor 12 for detecting a storage amount in the hopper 7 is provided on a side wall 7b above the inclined side surface 7a, and an upper wall 7c is provided.
Is provided with an inlet 7A for rice grains supplied from the outside.

As shown in FIG. 2, an expected location J of the rice grain group k is set in the predetermined transfer route, that is, on the falling route of the rice grain group k from the lower end of the chute. That is,
The transfer means H is configured to transfer the rice grain group k to the expected location J, that is, the light receiving position of the later-described inspection line sensors 5A and 5B.

On one side of the falling path of the rice grain group k, a linear light source such as a fluorescent lamp or the like illuminating the entire width of the rice grain group k arranged in a plurality of rows at the expected location J in a row. 4, and a line sensor 5B for receiving the reflected light of the illumination light from the linear light source 4 on the rice grain group k at the expected location J is disposed in a state stored in one of the cases 13B, On the other side, the linear light source 4
A line sensor 5A that receives the transmitted light transmitted through the planned existence location J, and a reflection for receiving the illumination light from the linear light source 4 and reflecting it toward the line sensor 5B for reflected light. The plate 8 is disposed in a state of being stored in the other case 13A.

The sides of the cases 13A and 13B facing the predetermined location J are constituted by windows 14A and 14B made of transparent glass for allowing incident light to pass therethrough. The reflecting plate 8 forms a region 8a having the same reflectance as the rice grains in a longitudinal shape corresponding to the entire width of the rice grain group k illuminated by the linear light source 4, and on both sides of the longitudinal region 8a. The surface on which the black region 8b is formed is fixed while being pressed against the back of the window 14A, and is also used as a fixing plate for the window 14A. The other window 14B is fixed by pressing with a dedicated fixing plate 15.

As described above, the illuminating means for illuminating the expected location J of the rice grain group k is constituted by the linear light source 4 and is configured to illuminate the entire width of the plurality of rows of the rice grain group k in the arrangement direction. The light receiving means for receiving the transmitted light through which the illuminating light from the linear light source 4 has passed through the predetermined location J is constituted by a line sensor 5A for transmitted light, and a plurality of rows of rice grain groups. The light receiving range is set so that the entire width is set as the light receiving range along the arrangement direction of k. still,
The line sensor 5B for reflected light is also provided with the plurality of rows of rice grain groups k.
The entire width of the light receiving area is set as the light receiving range along the direction in which the light receiving elements are arranged.

As shown in FIG.
A and 5B are a plurality of light receiving units 5a from which light receiving information can be separately taken out, with a range p (for example, about one-tenth of the size of the rice grain k) smaller than the size of the rice grain k as each light receiving target range. Is provided over the entire planned existence location J of the rice grain group k. Specifically, a monochrome type CCD sensor in which light receiving elements as a plurality of light receiving portions 5a are linearly juxtaposed along the direction of arrangement of the plurality of rows of rice grain groups k over the entire width thereof, and a rice grain group k Image of C
And an optical system for forming an image on each light receiving element of the CD sensor. As a result, transmission and reflection image information over the entire width of the rice grain group k in the flow direction can be obtained.

Air is blown from the light receiving position (planned existence position J) of the line sensors 5A and 5B on the planned transfer path to the downstream side in the direction of the path to the rice grains k and foreign matters determined to be defective, and the air is blown normally. An air blowing device 6 is provided for separating the rice grains k from the flow direction and collecting them in the defective product collection box 3. The air blowing device 6 includes a plurality of air guns 6a that individually perform blowing operations on each of the rice grain groups k divided into predetermined widths in the width direction with respect to the flow direction of the rice grains k.

To explain the control structure, as shown in FIG. 3, a control device 10 using a microcomputer is provided, and the control device 10 includes the two line sensors 5A and 5A.
Each image signal from B and the detection signal of the level sensor 12 are input. On the other hand, from the control device 10, in order to operate each air gun 6a of the air blowing device 6 separately, a plurality of electromagnetic devices for turning on and off the air flow of each air supply path from a compressor (not shown) to each air gun 6a are provided. A drive signal for the valve 11;
Based on the detection signal of the level sensor 12, a drive signal for the gate drive motor 9B for maintaining the storage amount in the hopper 7 at a set state is output.

Utilizing the control device 10, based on the light receiving information of the transmitted light line sensor 5A, the rice grain group k
The determination means 100 is configured to determine the quality of each rice grain or the presence or absence of foreign matter mixed in the rice grain group k. Specifically, as shown in the output waveform of the transmitted light line sensor 5A in FIG. 5, the determination means 100 corresponds to the amount of light received by the line sensor 5A for transmitted light, that is, the amount of light received by each light receiving unit 5a. Output voltage is appropriate light amount range ΔEt for rice grain group k
Is determined between the upper limit value UL and the lower limit value LL, the presence of a normal rice grain is determined, and when smaller than the lower limit value LL of the set appropriate range ΔEt, the transmittance of the defective rice grain is smaller than that of the normal rice grain. The presence of rice grains, foreign matter, etc. (for example, black stone grains) is determined.

Here, in the case of transmitted light, the light receiving portion 5a corresponding to a position where there is no rice grain k, foreign matter, etc. directly receives the illumination light from the illumination light source 4 and receives the light from the upper limit UL of the set appropriate range ΔEt. Also becomes a large output value Es. Therefore, the determination means 100 determines the upper limit value UL of the appropriate light amount range ΔEt.
And the light receiving amount Es when the illuminating light from the illuminating light source 4 is received without passing through the rice grains k and the like, the light-side determination level U
L1 is set, and the amount of light received by the line sensor 5A is set to the upper limit value UL of the appropriate light amount range ΔEt and the light-side determination level UL1.
In this case, it is configured to determine the presence of the defective rice grain k having a higher transmittance than the normal rice grain k or the presence of the foreign matter. As an example of a defective rice grain k or a foreign substance having a transmittance higher than that of the normal rice grain k, a defect in which “Uruchi rice” when the normal rice grain k is “glutinous rice” has a transmittance higher than that of the normal rice grain k. , And a thin colored transparent glass piece or the like becomes a foreign substance having a higher transmittance than the normal rice grain k.

FIG. 5 shows that the output voltage (light reception amount) of the light receiving portion 5a is different from the position where a part of the rice grain k has a colored portion, a black stone or the like (shown by e1), and the presence of a cracked portion. At a position (indicated by e2), which is located below the appropriate setting range ΔEt, and when there is a foreign substance or the like having a transmittance higher than that of normal rice grains, the appropriate setting is performed as indicated by a position e4. The bright side determination level UL1 above the range ΔEt.
FIG. 3 illustrates a state in which the position is lower than that of FIG.

In order to determine that the amount of light received by the line sensor 5A is between the light-side determination level UL1 and the upper limit value UL of the set appropriate range ΔEt, the determination means 100 includes the line sensor 5A. The light receiving amount (output voltage) of each light receiving section 5a of 5A is determined by the light-side determination level UL1.
Is smaller than the upper limit value UL of the appropriate light amount range ΔEt, and the obtained light receiver 5a is determined.
Is determined such that a portion where the adjacent continuous number exceeds a set number (for example, two) is a defective rice grain k having a higher transmittance than a normal rice grain k or a location where the foreign matter is present.

That is, the discriminating means 100 determines whether the light receiving amount of the light receiving portion 5a is smaller than the bright side determination level UL1 and the binary information that the light receiving amount of the light receiving portion 5a is smaller than the upper limit UL of the appropriate light amount range ΔEt. The light receiving unit 5a is calculated by calculating the binary information which is also large, and the light receiving amount is smaller than the bright side determination level UL1 and larger than the upper limit UL of the appropriate light amount range ΔEt.

Specific processing will be described with reference to FIG.
(A) is a light-side determination level UL in which the amount of light received by the light receiving unit 5a is on the bright side.
The output waveform is defined as 1 when the value is smaller than 1.
It is 1 at locations corresponding to the three positions e0, e1, e2, and e4. (B) is an output waveform (upper limit value U) which is set to 1 when the value is larger than the upper limit value UL of the set appropriate range ΔEt.
(An inverted waveform of the output waveform when the value smaller than L is 1), and only e4 is not output among the above four positions e0, e1, e2, and e4. Then, when the logical product (AND processing) of the waveform (a) and the waveform (b) is calculated,
As shown in (c), a signal waveform corresponding to only e4 is obtained. However, since the width of the waveform detected at UL1 is different from the width of the waveform detected at UL (UL1 is wider than UL), even at positions e0, e1, and e2 other than e4, a narrow pulse before and after. A wave shape appears, which can be removed by a filtering process that cuts the number of waveforms equal to or less than the set number (for example, two). And
As shown in (d), the lower limit value LL of the setting appropriate range ΔEt
The positions e1 and e2 below the position e4 and the position e4 are determined as defective positions.

On the other hand, in the case of reflected light, as shown in the output waveform of the reflected light line sensor 5B in FIG. 7, based on the received light information of the plurality of light receiving sections 5a of the line sensor 5A.
When the output voltage corresponding to the amount of light received by each of the light receiving units 5a is out of the proper setting range ΔEh, it is determined whether the rice grains are defective or the foreign matter is present. Here, the setting appropriate range ΔEh for the reflected light is set to a range of a predetermined width above and below the output voltage level e0 ′ for the standard reflected light from the normal rice grain.

FIG. 7 shows that, at a position where a part of the rice grain k has a colored portion (indicated by e1 ') and a position where a cracked portion exists (indicated by e2'), the rice grain k is below the appropriate setting range ΔEh. Illustrates a state where it is off, and when foreign matter such as a glass piece is present, it is a state where it deviates upward from the proper setting range ΔEh as shown at a position e3 ′ due to strong direct reflection light from the foreign matter. doing. Although not shown, the reflectance of a black stone or the like is very small, so that the waveform greatly deviates from the proper setting range ΔEh downward.

The transfer means H also uses the control device 10 and the air blowing device 6 based on the discriminating information of the discriminating means 100 to transfer the rice grain group k transferred to the expected location J. The normal rice grain k, the defective rice grain, and the foreign matter are separated and transferred to different routes. Specifically, when the discrimination means 100 discriminates the defective rice grain or the presence of the foreign matter, the discrimination from the planned existence location J to a different path for the defective rice grain or the foreign matter in the planned transfer path is performed. As the transfer time to the separation location (the location where the air gun 6a is installed) elapses, the defective rice grain or the foreign matter is separated into a path different from the path of the normal rice grain. That is, the rice grain group k is dropped and transported by its own weight, and the defective rice grains or foreign matter is blown from each air gun 6a corresponding to the position to separate the defective rice grains or foreign matter from the path of the normal rice grains.

[Alternative Embodiment] In the above embodiment, the light receiving means 5A is configured to include a plurality of light receiving portions 5a.
For example, a single sensor such as a photo sensor is used, and the upper limit and the lower limit of the appropriate light amount range and the light-side determination level are set for the output of this sensor. May be performed.

In the above embodiment, the binary information indicating that the amount of light received by the light receiving section 5a is smaller than the bright-side determination level UL1;
By calculating binary information that is larger than the upper limit value UL of the appropriate light amount range, a light receiving unit whose received light amount is smaller than the bright-side determination level and larger than the upper limit value of the appropriate light amount range is obtained. But,
It is not limited to this. For example, the light receiving amount of the light receiving unit 5a represented by the multi-value information is directly compared with the bright-side determination level UL1 and the upper limit value UL of the appropriate light amount range represented by the multi-value information, and is smaller than the bright-side determination level. Alternatively, it may be determined whether the value is larger than the upper limit value of the appropriate light amount range.

Also, in the case of calculating binary information as in the above embodiment, when the amount of light received by the light receiving section is smaller than the bright side determination level, it is set to 1 and the upper limit of the appropriate light amount range is set. Is large, binary information of 1 is obtained.
It is not limited to the one that performs logical AND operation on the value information.

In the above embodiment, the case where the granular material group as the inspection object is the rice particle group k has been described as an example. However, the present invention is not limited to this. For example, the presence or absence of defective or foreign matter in plastic particles or the like is inspected. Also applicable to cases.

In the above embodiment, the illuminating means 4 is constituted by a line-shaped fluorescent lamp so as to illuminate the entire width of a plurality of rows of inspection objects (rice grain group k). )
The specific configuration of the illuminating means can be changed as appropriate according to the expected location and other conditions. Further, in the above embodiment, the lighting means 4 is constituted by a single lighting means. However, separate lighting means may be provided for transmitted light and reflected light. Also, for the purpose of improving the uniformity of the illumination light amount, the light emitted from the illumination means for transmitted light (for example, a fluorescent lamp) is not used as it is as illumination light, but the light reflected by a diffusely reflecting reflector is not used. It can be illumination light.

In the above embodiment, the light receiving means 5A is constituted by using a monochrome type CCD sensor, but may be constituted by using an image pickup tube type television camera. Instead of a monochrome type CCD sensor, a color type CCD sensor may be used, and the presence or absence of defective rice or foreign matter may be more accurately determined from the amount of light received for each of the color information R, G, and B.

In the above-described embodiment, the transfer means H arranges a plurality of rows of granular materials (rice grain groups k) as inspection objects along a predetermined transport path (that is, in a state where they are spread in the horizontal direction).
Although the transfer is performed, the transfer may be performed, for example, in a line (that is, in a straight line) along a predetermined transfer path.

In the above embodiment, the transfer means H for transferring a group of granular materials (rice particle group k) as an object to be inspected in a state of being arranged in a plurality of rows along a predetermined transfer path is constituted.
Although the inclined shooter 1 is provided to slide the granular material group on the surface thereof, in addition to this, for example, a transport device or the like for mounting and transporting the granular material group in a single layer state may be provided. . Air is blown toward defective particles in the group of granular materials (rice particle group k) that are falling under their own weight, so that the defective means is separated from the normal path of the granular material and transported.
However, the present invention is not limited to this. For example, a defective product may be sucked by air.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a defect detection / removal device.

FIG. 2 is a schematic side view of the same.

FIG. 3 is a block diagram of a control configuration.

FIG. 4 is an explanatory diagram of a light reception detection range.

FIG. 5 is an output waveform diagram of transmitted light receiving means.

FIG. 6 is a waveform diagram illustrating a defect detection process in the case of transmitted light.

FIG. 7 is an output waveform diagram of reflected light receiving means.

FIG. 8 is a side view showing a light receiving detection unit in a conventional example.

FIG. 9 is a waveform diagram illustrating a defect detection process in a conventional example.

[Explanation of symbols]

 Reference Signs List 4 illuminating means 5A light receiving means 5a light receiving unit 100 discriminating means H transport means

Claims (7)

[Claims] An illumination means for illuminating a predetermined existence position of an inspection object with a group of granular materials as an inspection object, and a light receiving means for receiving illumination light from the illumination means transmitted through the expected existence position Means, based on the light receiving information of the light receiving means, a defect detection device provided with a determination means for determining the quality of each granular body in the granular body group or the presence of foreign matter mixed in the granular body group, The determining means determines the presence of a normal granular material when the amount of light received by the light receiving means is between the upper limit value and the lower limit value of the appropriate light amount range for the granular material, and determines the upper limit value of the appropriate light amount range. A light-side determination level is set between the amount of light received when the illumination light from the illuminating unit is received without passing through the inspection object, and the amount of light received by the light-receiving unit falls within the appropriate light amount range. Upper limit and the light side judgment level Configured failure detecting apparatus as in some cases, to determine the presence of the granules or the foreign substance transmittance is larger defect than normal granules during. 2. The method according to claim 1, wherein when the light receiving amount of the light receiving unit is smaller than a lower limit value of the appropriate light amount range, the determining unit determines whether there is a defective granular material or a foreign material having a transmittance smaller than a normal granular material. The failure detection device according to claim 1, wherein the failure detection device is configured to determine. 3. The light receiving unit is configured to include a plurality of light receiving units from which light receiving information can be separately taken out over the entirety of the planned existence location, and the determining unit includes: A light receiving portion whose light receiving amount is smaller than the light-side determination level and larger than the upper limit of the appropriate light amount range is determined. 2. The apparatus according to claim 1, wherein the defect is determined to be a defective granular material having a transmittance higher than that of a normal granular material or a location of the foreign matter.
Or the defect detection device according to 2. 4. The binary information that the light receiving amount of the light receiving unit is smaller than the light side determination level, and the light receiving amount of the light receiving unit is larger than an upper limit value of the appropriate light amount range. And calculating the binary information to obtain a light receiving unit in which the received light amount is smaller than the bright side determination level and larger than the upper limit value of the appropriate light amount range. 3. The defect detection device according to 3. 5. A defect removing device comprising the defect detection device according to claim 1, further comprising a transfer unit that transfers the inspection object along a predetermined transfer path. The lighting means is arranged on one side, and the light receiving means is arranged on the other side, with the scheduled transfer path interposed therebetween, and the transferring means transfers the inspection object to a light receiving position of the light receiving means, On the basis of the discrimination information of the discriminating means, the normal granular material, the defective granular material, and the foreign matter among the inspection objects transferred to the light receiving position of the light receiving means are separated and transferred to different paths. The configured defect removal device. 6. The transfer means is configured to transfer the inspection objects in a single-layer state and in a plurality of rows, and the illumination means illuminates the entire width of the plurality of rows of the inspection objects in the arrangement direction. 6. The defective object removing device according to claim 5, wherein the light receiving unit is configured to have a full width as a light receiving range along a direction in which the plurality of rows of inspection objects are arranged. 7. The transfer means drops the test object by its own weight and transfers the test object, and blows air on the defective granular material or the foreign matter so as to separate the defective granular material or the foreign substance from a path of a normal granular material. The defective object removing device according to claim 5 or 6, wherein