JP2000097866A - Detector for defective, and separator using same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate troublesome work operation requiring many labors and times for inclination adjustment for a reflection face when the type of an inspection object is changed, so as to conduct proper detection for a defective, and to properly separate the defective from fair articles. SOLUTION: Detected light from a particle group (k) illuminated by an illumination means 4 in a planed existence portion J is received in a light receiving means 5 provided with a plurality of light receiving parts having as respective light receiving ranges ranges smaller than respective particle sizes, and plural kinds of reflection faces (hm) for reflecting toward the receiving means 5 light having brightness same or substantially same to the detected light from a fair article out of inspection objects after change are arranged in a backpart side portion of the portion J while used in an alternative way in response to type change of the inspection object. Whether received light quantity of the receiving means 5 for receiving the detected light from the particle group (k) and reflected light from the reflection faces (hm) is out of a fair light quantity range or not is determined in each light receiving part in the plural receiving parts provided in the receiving means 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illumination means for illuminating a place where an inspection object is supposed to exist with a group of granular objects as an inspection object, and detection from the inspection object illuminated by the illumination means. A light receiving means for receiving light; and a light receiving direction of the light receiving means, which is installed at a position on the back side of the expected location, and which has the same or substantially the same brightness as detection light from a proper one of the inspection objects. A light-reflecting surface for reflecting the light toward the light-receiving means, and a light-receiving amount based on light-receiving information of the light-receiving means for receiving detection light from the inspection object and light reflected from the reflection surface. A defect detection device provided with a determination unit for determining whether or not a detection light from a proper one of inspection objects is out of a proper light amount range; and a separation device using the defect detection device. .

[0002]

2. Description of the Related Art In the above-mentioned defective object detection apparatus, when a group of, for example, rice grains as a group of particles of an inspection object is transferred to an expected location along a predetermined transfer path, a light source such as a fluorescent lamp, which is an illuminating means, is used. The rice grain group is illuminated, and at the same time, the reflection surface arranged in the light receiving direction of the light receiving means such as a photo sensor and the back side of the expected location is illuminated by the light source or the like,
Light having the same or substantially the same brightness as the detection light from a proper one of the rice grain groups is reflected from the reflection surface toward the light receiving means. Then, the detection light from the rice grain group reflected by the rice grain group or transmitted through the rice grain group and the reflected light from the reflection surface are received by the light receiving means, and the amount of light received is an appropriate amount of light for a predetermined appropriate object. If it is out of the range, it is determined that defective rice such as colored rice or defective such as stone or plastic exists (for example, see Japanese Patent Application Laid-Open No. 22980/1990). still,
The defective object whose presence has been determined is blown by air by an injection nozzle or the like at a position on the lower side of the route from the position of the expected existence portion, and is separated into a route different from the route of the proper product.

[0003] In the above-mentioned defective object detection apparatus, in many cases, a light receiving means provided with a detection unit (a light detection unit such as a photo sensor) having a size similar to that of each rice grain is used. In addition, the above-mentioned inspection target rice grain group may be changed to a different type such as brown rice or polished rice, in which case, the light amount of the detection light from the proper object of each inspection target, It changes depending on the difference in reflectance and transmittance of each inspection object with respect to illumination light. Therefore, conventionally, when the inspection object is changed, the light reflected toward the light receiving means from the reflection surface installed on the back side of the expected location of the inspection object is changed to the appropriateness of the inspection object to be changed. The inclination of the reflection surface is adjusted so that the light has the same or substantially the same brightness as the detection light from the object, so that the defective object is properly detected.

[0004]

However, in the above-mentioned prior art, the light receiving means is formed so as to have a detection unit having a size approximately equal to the size of each grain. In the case of a defective object, the difference in the amount of light between the detection light from the defective object and the detection light from the proper object (normal grain) is small. Therefore, in order to accurately detect the difference in the amount of light, it is necessary to use a reflective surface. The light reflected from the
It is necessary to adjust as much as possible the same brightness as the detection light from the proper inspection object to be changed, and the work of adjusting the inclination of the reflection surface is troublesome, and requires much labor and time. There was a defect.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to adjust the inclination of the reflecting surface when the type of the inspection object is changed in order to eliminate the above-mentioned disadvantages of the prior art. The object of the present invention is to obtain a defective object detection device that can perform appropriate discrimination processing by eliminating the troublesome and time-consuming work that is required, and furthermore, in each of the changed types of the inspection target, detecting the defective object, Another object of the present invention is to provide a separation device capable of appropriately separating a defective product from a proper product.

[0006]

According to the first aspect of the present invention, a portion where the inspection object is to be present is illuminated by illumination means using the group of granular objects as an inspection object, and the particles are illuminated by the illumination means. The detection light is provided with a plurality of light receiving portions that are each a light receiving target range with a range smaller than the size of each particle of the granular body group over the entire expected location. While being received, the light having the same or substantially the same brightness as the detection light from the proper one of the inspection objects after the change in the light receiving direction of the light receiving means and on the back side of the expected existence position is described above. A plurality of types of reflecting surfaces that reflect toward the light receiving means are selectively used and installed in accordance with a change in the type of the inspection object, and light reflected from the reflecting surface is received by the light receiving means. Is done. Then, it is determined whether or not the amount of light received by the light receiving unit that has received the detection light from the particulate group and the reflection light from the reflection surface is out of the appropriate light amount range for the detection light from the appropriate one of the inspection objects. The determination is performed for each of the plurality of light receiving units provided in the light receiving unit.

That is, the determination as to whether or not the light amount of the detection light from the granular body group has deviated from the appropriate light amount range is performed for a range smaller than the size of each particle of the granular body group.
Even if there is a partially defective portion such as partial coloring, the amount of light detected from the defective portion will vary greatly.Therefore, select from a plurality of types of reflective surfaces according to the type of inspection object. Even if the reflected light from the reflecting surface arranged on the back side of the expected location of the particulate group is slightly different from the brightness of the detection light from the appropriate object of the particulate group, It is possible to reliably determine that the detection light is out of the appropriate light amount range. Therefore, when the type of the inspection object is changed, by using the reflection surface corresponding to the inspection object to be changed from among the plurality of types of reflection surfaces, the reflection object from the changed inspection object is used. It is possible to appropriately determine whether the detection light is out of the appropriate light amount range, and the light reflected from the reflection surface toward the light receiving means is changed every time the type of the inspection object is changed, as in the related art. The troublesome and time-consuming work of adjusting the inclination of the reflecting surface so that the brightness of the inspection object to be detected is the same as the detected light from the appropriate object is eliminated, and proper discrimination processing is possible. A possible defective object detection device is obtained.

According to a second aspect of the present invention, in accordance with the first aspect, the wavelength of the illumination light of the illumination means is changed to a different wavelength in accordance with the change of the type of the inspection object. Therefore, when the type of the inspection object is changed, good defective object detection is performed by using illumination light having a wavelength suitable for determining the presence of a defective object with respect to a proper inspection object to be changed. Can be performed, and the preferable means of claim 1 can be obtained.

According to a third aspect, in the first or second aspect,
A reflecting member having a plurality of types of reflecting surfaces is installed with its installation state changed such that the plurality of types of reflecting surfaces are selectively switched to a use state. Therefore, for example, when a plurality of types of reflecting surfaces are provided on separate reflecting members, and a reflecting member having a reflecting surface to be used is selected and installed, a large number of reflecting members are required, and the number of reflecting members becomes large. For example, by providing all of a plurality of types of reflective surfaces to be used in one reflective member, the storage and management becomes troublesome and there is a possibility that only some of the reflective surfaces may be lost. Storage and management can be simplified, and the possibility that only a part of the reflecting surface is lost can be appropriately avoided, whereby the preferable means of claim 1 or 2 can be obtained.

[0010] In claim 4, in claim 1 or 2,
Among the plurality of types of reflecting surfaces, a plurality of reflecting members each having a different type of reflecting surface are separately installed, and the use state of the plurality of types of reflecting surfaces is selectively switched.
Accordingly, for example, if all of a plurality of types of reflecting surfaces to be used are provided in one reflecting member, the reflecting member becomes large and a large installation space is required. Thus, for example, by providing a plurality of types of reflecting surfaces to be used on separate reflecting members, each of the reflecting members can be reduced in size and the installation space can be reduced, and the defective object detection device can be miniaturized as much as possible. Thus, the preferred means of claim 1 or 2 is obtained.

According to a fifth aspect, in the first or second aspect,
Of the plurality of types of reflective surfaces, a reflective member provided with a part of the reflective members is mounted, and the reflective surface provided on the reflective member is used, while a portion exposed when the reflective member is detached. And a reflection surface of a type different from the reflection surface of the reflection member among the plurality of types of reflection surfaces is used in a state where the reflection member is separated. Therefore, the number of reflection surfaces provided on the reflection member that is detachably installed is reduced, and while the reflection member is configured to be simple, the reflection surface is formed by effectively using the members inside the apparatus, and As a result, it is possible to secure a necessary number of reflecting surfaces, thereby obtaining the preferable means of claim 1 or 2.

[0012] In claim 6, any one of claims 1 to 5 is provided.
In the separation device provided with the defective object detection device according to the item, the granular material group as an inspection object is located along the expected transfer path, that is, the expected existence position, that is, the light receiving position of the light receiving means, and the position of the expected existence position. While being transferred to the separation point on the lower side of the route, based on the determination information on whether or not the amount of light received by the light receiving means is out of the appropriate light amount range for the detection light from the appropriate one of the inspection objects, When the type of the inspection object is changed, the control unit that controls the operation of the separation unit that separates the proper object and the defective object out of the group of granular materials transferred to the separation point into different paths is changed. It is alternatively possible to switch to a plurality of test modes with different control parameters. Therefore, for example, in order to perform the defect detection and the separation of the defect without transferring the particulate group, for example, it is necessary to configure the apparatus to be movable. By arranging each part of the equipment rationally so that it can be sequentially transported to the separation point where the defective and proper parts are separated, the type of granular material group as the inspection object can be configured while simplifying the equipment in a non-movable manner. Is changed, an appropriate control parameter corresponding to each inspection object after the change can be used to detect a defective product and to obtain a separation device capable of appropriately separating the defective product from an appropriate product. .

According to a seventh aspect of the present invention, in the sixth aspect, when the control means is selectively switched to the plurality of inspection modes, in each of the switched inspection modes, a defective product is detected at the expected location. After the presence is determined, a time interval until the separation unit is operated is set to a different value according to the type of the inspection object. Therefore, depending on the type of the inspection object to be changed, when the transfer speed in the planned transfer path is different, according to the difference in the transfer speed,
In the inspection object having a high transfer speed, the time interval is shortened as compared with the inspection object having a low transfer speed, so that appropriate separation can be performed at the separation point. Suitable measures are obtained.

According to claim 8, in claim 6 or 7,
The expected location of the inspection object is set to be linear, and the plurality of light receiving units provided in the light receiving unit are:
The control unit determines that the light receiving amount of the set number of light receiving units arranged continuously in the line is out of the proper light amount range in a line shape corresponding to the expected position of the linear shape. Only when this is the case, the connection determination processing for determining the presence of a defective is performed, and when the mode is selectively switched to the plurality of inspection modes, the light receiving unit in the connection determination processing is switched in each of the switched inspection modes. Set the value of the set number to a different value. Therefore, in the case where the detection light amount partially deviates from the appropriate light amount range in a proper inspection object, even one light receiving amount of each light receiving unit provided in the light receiving unit is out of the appropriate light amount range. In the normal process of determining that a proper object is defective, the proper process may be erroneously determined to be defective. In the case where the size of the area differs depending on the type of the inspection object, the value of the set number of light receiving units in the connection determination processing is set to an appropriate value according to the difference. Claim 6
Or 7 suitable means are obtained.

In a ninth aspect, any one of the sixth to eighth aspects is provided.
In the paragraph, while changing the group of granules as the inspection object to rice milling and brown rice, the illumination light from the illumination means is reflected detection light reflected by the inspection object, the light receiving direction of the reflected light receiving means, The reflected light from the reflective surface for reflected light provided on the back side of the expected existence location is received by the reflected light receiving means, while the granular group is changed to polished rice and brown rice, In the light receiving direction of the transmitted light receiving means and on the reflection surface for transmitted light provided on the back side of the expected location, the reflection surface for brown rice and the brown rice formed and provided so as to correspond to rice and brown rice respectively. Reflective surface is used as an alternative, and the illumination light from the illuminating means is transmitted through the inspection object, and the transmission detection light is transmitted from the selectively used rice reflective surface and the brown rice reflective surface. The reflected light is received by the transmitted light receiving means. Then, based on the respective light receiving information of the reflected light receiving means and the transmitted light receiving means, the amount of light received by each light receiving means deviates from an appropriate light amount range for each detection light of reflection and transmission from a proper one of the inspection objects. A determination is made as to whether or not it has occurred. Therefore, when detecting the defective while changing the granular body group to milled rice and brown rice, only the transmitted light reflecting surface is changed to the milled rice reflecting surface and brown rice reflecting surface corresponding to the milled rice and brown rice respectively, Since the same reflecting surface is used without changing the reflecting surface for reflected light, the device configuration can be simplified as compared with changing both reflecting surfaces, and thus any one of claims 6 to 8 can be used. The preferred means of paragraph 1 is obtained.

According to a tenth aspect of the present invention, in the ninth aspect, the control means switches to the rice inspection mode and the brown rice inspection mode in accordance with the change of the inspection object to the rice polishing and the brown rice inspection mode, respectively. And the connection determining process is performed only on the light receiving information of the plurality of light receiving units provided in the transmitted light receiving unit. Therefore, unlike the polished rice, unlike the polished rice, a portion of the germ having poor light transmittance remains, and when the light amount of the transmitted light from the germ region is out of the appropriate light amount range, the transmitted light of the brown rice inspection mode is used. By setting the number of light receiving portions corresponding to the embryo regions in the light receiving information and performing the connection determination process, the reflected light from the brown rice is prevented while avoiding erroneous determination of an appropriate brown rice as a defective one. With the information and the transmitted light and reflected light information from the germ-free rice, it is possible to accurately inspect even a fine defective portion without performing the connection discrimination processing, and thus the preferable means of claim 9 is obtained. Can be

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a defective object detecting device and a separating device according to the present invention will be described. Meanwhile, the case where the defective object detection and separation processing is performed will be described with reference to the drawings.

As shown in FIGS. 1 to 3 (note that FIG. 3 is an explanatory diagram of the operation of the defective object detection and separation process, and the arrangement of the device configuration is different from that of FIGS. 1 and 2). A wide plate-like shooter 1 is installed at a predetermined angle (for example, 60 degrees) with respect to a horizontal plane, and is conveyed and supplied by a feeder 9 from a storage tank 7 provided on an upper side of the shooter 1. The rice grain group k is transported while being guided downward in a state where the upper surface of the chute 1 is spread in the horizontal direction in a single state. Here, the shooter 1 is a plane shooter formed on a flat guide surface over the entire width in the width direction. Here, since the purpose is to transfer the particles in a single layer state, even if the particles partially overlap depending on the flow state to form a two-layer state or the like, it is included in the concept of a single layer state.

The storage tank 7 stores inspection objects such as brown rice supplied from an external huller and milled rice supplied from a rice mill, and also subjects the inspection objects from outside to a primary sorting process. The proper or defective product obtained is stored for re-sorting. The tank 7 is formed in a tapered cylindrical shape toward the lower end, and the supply amount of the rice grains k dropped from the tank 7 onto the feeder 9 to the shooter 1 is adjusted by changing the transport speed of the rice grains k by the vibration of the feeder 9. Is done.

Rice grains k flowing down from the lower end of shooter 1
In the flow-down path, the rice grain group k is expected to be present in a wide state in a straight line.
) Are set, and the linear light sources 4A and 4B made of fluorescent lamps and the like as illumination means for illuminating the detection position J are provided.
And a reflection line sensor 5B as reflected light receiving means for receiving the reflected light of the illumination light from the linear light sources 4A and 4B at the rice grain group k at the detection position J. On the same side. On the other hand, the illumination light from the linear light sources 4A and 4B receives the transmitted light transmitted through the rice grain group k at the detection position J on the opposite side of the detection position J from the installation position of the linear light sources 4A and 4B. A transmission line sensor 5A is provided as transmitted light receiving means. As described above, as the light receiving means for receiving the detection light from the rice grain group k illuminated by the linear light sources 4A and 4B,
A transmission line sensor 5A and a reflection line sensor 5B are provided.

As shown in FIG.
A and 5B denote a plurality of light receiving portions 5a each having a range p (for example, about one-tenth of the size of the rice grain k) smaller than the size of each rice grain k of the rice grain group as the light receiving target range, by the straight line. The entirety of the detection positions J are arranged in a line so as to correspond to the detection positions J in a straight line. Specifically, a monochrome CCD sensor 5 in which light receiving elements as a plurality of light receiving portions 5a are arranged in a straight line.
0, and an optical system 51 for forming an image of the rice grain group k at the detection position J on each light receiving element of the CCD sensor. In the line sensors 5A and 5B, for example, in FIG. 3, each light reception information is sequentially extracted from each light reception unit 5a from the left end to the right end of the detection position J.

The linear light sources 4A and 4B obliquely lower the detection position J so as to illuminate the rice grain group k from a plurality of directions inclined with respect to the light receiving direction of the transmission line sensor 5A and the reflection line sensor 5B. Light source 4A that illuminates from above
And two linear light sources 4A and 4B of an upper light source 4B for illuminating the detection position J from obliquely above.
A and 4B are held by the frame 22 while maintaining the inclined illumination angle. And, since the detection position J is illuminated from different directions by changing the illumination angle of the illumination light, even if the rice grain k is shifted from the normal detection position J in the lateral direction, it is preferably in a uniform state as much as possible. You will be able to illuminate.

The linear light sources 4A and 4B are provided with a rice grain group k.
As the type of rice is changed to, for example, brown rice and milled rice,
The wavelength of the illumination light can be changed to a different wavelength. That is, as shown in FIG.
Compared to blue light with a short wavelength, red light with a long wavelength is much lower, but the absorbance of brown rice is much less for blue light with a short wavelength and red light with a long wavelength. No big difference. So, when inspecting rice polishing,
For example, use a blue fluorescent lamp to properly identify defective rice that has been burnt red and black against the appropriate polished rice (good rice). On the other hand, a daylight-colored or light-bulb-colored fluorescent lamp is used so that foreign substances such as black burnt rice and opaque dead rice can be identified.

In the light receiving direction of the light receiving means 5A and 5B and on the back side of the detection position J, the same or substantially the same brightness as the detection light from a proper one (normal rice) of the rice grain group k is provided. A reflecting surface hm for reflecting light toward the light receiving means 5A, 5B is provided. Specifically, as the reflection surface hm, the transmitted light transmitted through a proper one of the rice grain group k (normal rice) in the light receiving direction of the transmission line sensor 5A and on the back side of the detection position J. A transmitted light reflection plate 8A having a transmitted light reflection surface hm that reflects light having the same or substantially the same brightness toward the transmission line sensor 5A is provided.
On the other hand, in the light receiving direction of the reflection line sensor 5B and on the back side of the detection position J, light having the same or substantially the same brightness as the reflected light reflected by a proper one (normal rice) of the rice grain group k is applied. A reflected light reflector 8A having a reflected light reflection surface hm that reflects toward the reflection line sensor 5B is provided.
The linear light sources 4A and 4B are connected to the respective reflecting surfaces h.
m, hm.

The linear light sources 4A and 4B, the reflection line sensor 5B, and the transmitted light reflection plate 8A are
The transmission line sensor 5 is stored in one of the storage portions 13B.
A and the reflection plate for reflected light 8B are stored in the other storage portion 13A. In addition, both storage parts 13A, 13B are formed in an integral box body having a common side plate, and both storage parts 13A, 13B.
Each is provided with window portions 14A and 14B for light transmission made of plate-shaped transparent glass on the side facing the detection position J. Here, the two windows 14A and 14B are arranged in a state (V-shape) in which the distance from each other decreases toward the lower side.

Next, the reflection plate for transmitted light 8A will be described. As shown in FIGS. 7 and 8 (a) and (b), a long bracket 22a having a U-shaped cross section is fixed to the light source supporting frame 22 by screws.
At the corner of the bracket 22a on the opposite side to the portion fixed to the frame 22, a long-shaped light-reflecting plate for transmission 8A having an L-shaped cross section is bent at 90 degrees to each of the surfaces h1 and h1.
h2 while being replaced with a position to be used as the reflection surface hm for transmitted light,
Attached to. Then, the transmitted light reflecting plate 8A
The surfaces h1 and h2 provided in the above correspond to a rice-reflecting reflective surface h1 and a brown rice reflective surface h2 formed so as to correspond to rice and brown rice, respectively. From the above, a plurality of types of reflecting surfaces h1,
h2, the transmitted light reflecting plate 8A as a reflecting member provided with
The installation state is configured to be changeable so that the plurality of types of reflection surfaces h1 and h2 are selectively switched to the use state.

When replacing the linear light sources 4A and 4B and replacing the surfaces h1 and h2 of the transmitted light reflecting plate 8A, as shown in FIG. 1
Put your hand in a state where the lid plate 13f on the upper surface side of 3B is raised,
By rotating the frame 22 upward about the fulcrum 22b by about 90 degrees, the linear light sources 4A and 4B and the transmitted light reflecting plate 8 are rotated.
The work is performed with A facing upward.

Further, as shown in FIG. 8C, the lateral surface of the bracket 22a located at the back of the reflecting surfaces h1 and h2 has a different specification from the reflecting surfaces h1 and h2 for milled rice and brown rice. It is formed on the third reflecting surface h3. That is, the rice-reflecting surface h1 is formed in a relatively bright color (for example, cream), the brown rice-reflecting surface h2 is formed in a slightly darker color than the rice-reflecting surface h1, and the third reflecting surface h is formed.
Reference numeral 3 is used when, for example, good rice is selected from defective products, and is formed in a black color. In addition, each reflection surface is formed as a coating film by printing or the like on the surface of the base member. As described above, a plurality of types of reflecting surfaces h1, h2, h
3, the transmitted light reflecting plate 8A as a reflecting member having some of the types (reflecting surfaces h1 and h2) is detachably installed, and the transmitted light reflecting plate 8A is detached. In the exposed portion (the surface of the bracket 22a), a reflection surface h3 of a different type from the reflection surfaces h1, h2 provided in the transmitted light reflection plate 8A among the plurality of types of reflection surfaces h1, h2, h3 is provided. Will be done.

On the other hand, the reflected light reflecting surface hm provided on the reflected light reflecting plate 8B is a group of rice grains illuminated by the linear light sources 4A and 4B in a region 8a having the same reflectance as the good rice of the rice grains k. k so as to form a longitudinal shape corresponding to the entire width of k, and form black regions 8b on both sides of the longitudinal region 8a.
It is formed as a coating by printing or the like on the inner surface of the window 14A. Here, even if the inspection object is changed to brown rice and polished rice, the reflection plate 8B for reflected light is used so that the amount of illuminating light from the light sources 4A and 4B is the same so that the reflection detection light from brown rice and polished rice is the same. Are adjusted and the same reflector is used. That is, when the inspection object is changed to brown rice and polished rice, only the transmitted light reflecting surface hm provided on the transmitted light reflecting plate 8A is connected to the polished rice reflecting surface h1 and the brown rice reflecting surface h2. In addition, they are alternatively configured to be freely used.

Next, the cleaning means C for cleaning the windows 14A and 14B will be described. As shown in FIGS. 9 and 10, a pair of wiper members 23 abutting on the surfaces of both windows 14A, 14B are fixed to the support plate 24 in a V-shaped arrangement corresponding to the gap between the windows 14A, 14B. The support plate 24 is attached to the lower end of an arm 25 that faces vertically. A cylindrical upper portion 25A attached to an upper portion of the arm 25 is slidably fitted to a rodless cylinder 26 in a laterally oriented posture, and is engaged with a magnet 30 provided on a piston 29 in the cylinder 26 by a magnetic force. I agree. At both ends of the rodless cylinder 26, there are provided air supply ports 26B for intermittently supplying air supplied from an air tank 15 to be described later by a solenoid valve 26A (see FIG. 4). The air is supplied alternately to the cylinder 26 from the
6, the upper portion 25A moves in conjunction with the piston 29, and each wiper member 2
3 cleans both windows 14A, 14B. A pair of left and right limit switches LS1 and LS2 for detecting that the upper portion 25A has reached each end of the rodless cylinder 26 is provided (see FIG. 4).

Left and right guides 4 supported by the machine frame
A pair of left and right vertically long members 3 inserted from above with respect to
1, the left and right ends of the rodless cylinder 26 are held, and a third illumination light source 4C that is turned on for a special purpose is held via a mounting plate member 28 or the like. The light source 4C and the light source 4C are configured to be detachably attached to and removed from the apparatus in the vertical direction. At the time of mounting, the holding knob 33 is screwed into the nut 42 on the machine frame side to prevent rattling in the vertical direction, and at the time of detachment, the screwing of the knob 33 with the nut 42 is released. It is configured so that it can be lifted.

Air is blown to the downstream of the detection position J of the two line sensors 5A and 5B to the rice k or foreign matter determined to be defective on the basis of the light reception information at the detection position J. An air blowing device 6 for separating the rice grains k in the horizontal direction from the flow direction is provided. The air blowing device 6 arranges a plurality of spray nozzles 6a side by side in a state corresponding to each section formed by dividing the granular material group into a plurality of sections with a predetermined width, and ejecting the section where a defective object exists. The nozzle 6a is configured to be operated.

As described above, the shooter 1 moves the rice grain group k along the predetermined transfer path (the flow path of the rice grain group k on the chute and the fall path of the rice grain group k falling from the lower end of the chute) on the two line sensors 5A and 5B. Of the rice grain group k transferred to the separation position, the transfer means H configured to transfer the detection position J to the detection position J and the separation position on the lower side of the route than the detection position J. A separating means for separating an object and a defective object into different paths is provided.

Then, of the rice grains k flowing down from the lower end of the chute 1 along a predetermined path, the spray nozzle 6
The receptacle 2B for good rice, which collects normal rice grains k that proceed as they are without being blown by air from a, and is separated from the flow of normal rice grains k by blowing air. A receiving portion 3B for collecting defective rice such as colored rice or cracked rice or a foreign matter such as stone or glass fragments is provided, and a receiving portion 2B for good rice is formed in a tubular shape elongated in the width direction. A defective receiving port 3B is formed so as to surround the good rice receiving port 2B. Note that the rice grains k collected at the good rice receiving portion 2B and the defectives collected at the defective product receiving portion 3B are stored in the tank 7 of the inspection apparatus for re-sorting or the like. Or, it is transported to another inspection device.

As shown in FIG. 1, vertical frames F2 and F standing upright on a bottom plate F1 having jack bolt type legs F0.
3, F4 are connected by horizontal frames F5, F6, F7 to form a machine frame. An operation console 21 for displaying and inputting information is installed in the upper oblique portion of the front vertical frame F4, a vibration generator 9A for the feeder 9 is installed on the horizontal frame F5, and a power supply box is installed on the bottom plate F1. 17 and an air tank 15 for supplying air to the air blowing device 6 and the rodless cylinder 26. The box-shaped storage portions 13A and 13B are supported by the vertical frame F4 on the front side and the vertical frame F3 on the rear side, respectively.
Are supported on the upper side by the horizontal frame F6 and on the lower side by the storage section 13B, and the control box 16 is installed on the horizontal frame F7. A rotary light 18 for alarm (referred to as a "patlight") is installed at the upper part of the apparatus, and a cover 12 that covers the outer surface of the apparatus is attached to the machine frame.

Actually, as shown in FIG. 11, four inspection apparatuses (units) SU1, SU2, SU3, and SU4 are arranged in a horizontal direction to constitute an inspection system.
The operation console 21 installed on the table SU1 is configured to perform a driving operation for all units.
As shown in FIG. 1, a cover 1 on the front side of each unit is provided.
The upper cover 12A of the second unit is configured to be openable and closable in the vertical direction. With the upper cover 12A raised, the work of replacing the reflection surface hm of the reflection plate 8A for transmitted light and the operation of the line light sources 4A and 4B are performed. Replacement work and inspection of the inside of the device are performed.

As shown in FIG. 12, the display console 21 has a display operation panel 21a formed on a touch panel.
And a main power switch 21b for turning on / off the power of the apparatus
, A feeder switch 21c, and an exclusion switch 21d. Here, when the feeder switch 21c is turned on, the feeders 9 of all units operate collectively, and when the elimination switch 21d is turned on, the air blowing devices 6 of all units operate collectively.
Each unit is provided with an LED panel 20 for displaying information during operation and the like, and a pressure gauge 32 indicating the pressure of air supplied from each air tank 15.

To explain the control structure, as shown in FIG. 4, a control device 10 using a microcomputer is provided, and the control device 10 includes the image signals from both line sensors 5A and 5B and the console 21. Operation information from
Detection signals from the limit switches LS1 and LS2 are input. On the other hand, from the control device 10, each drive signal for display on the console 21 and the LED panel 20, a drive signal for a lighting circuit 19 for lighting the linear light sources 4A, 4B, 4C, and the rotary lamp 18 are transmitted. A drive signal to be actuated, a drive signal to a plurality of solenoid valves 11 for turning on and off each air supply to each injection nozzle 6a, a drive signal to the feeder vibration generator 9A, and air flow to the rodless cylinder 26 And a drive signal for the electromagnetic valve 26A that turns on and off the power supply.

The light receiving means 5 which receives the detection light (transmission detection light and reflection detection light) from the rice grain group k and the reflection light from each reflection surface hm using the control device 10.
Based on the light reception information of the (transmission and reflection line sensors 5A, 5B), it is determined whether or not the amount of received light is out of the appropriate light amount range for the detection light from the proper one (good rice) in the rice grain group k. A determination unit 100 for performing the determination is configured.
More specifically, the determination means 100 determines, for each of the light receiving units 5a provided in each of the line sensors 5A and 5B, each light receiving unit based on the light receiving information of the transmission line sensor 5A and the reflection line sensor 5B. The light receiving amount of 5a is within an appropriate light amount range (ΔEt for transmitted light, ΔEh for reflected light).
Is determined.

Further, control means 101 for controlling the operation of the air blowing device 6 based on the discrimination information of the discrimination means 100 using the control device 10 is constituted.
The control means 101 is configured to be selectively switchable to a plurality of inspection modes having different control parameters according to a change in the type of the inspection object.

More specifically, as a different control parameter provided in the plurality of inspection modes, after the presence of a defective object is detected at the detection position J, the air blowing device 6
The time interval before activating is included. That is,
The transfer speed in the planned transfer path (the flow path of the rice grain group k on the chute and the fall path of the rice particle group k falling from the lower end of the chute) differs depending on the inspection object. This is because the transfer time until the transfer is different. For example, in the case of brown rice, the transfer time is about 20% faster than in the case of milled rice. Therefore, the control means 101 switches to the rice polishing mode and the brown rice inspection mode in accordance with the change of the inspection target to the rice polishing and the brown rice, respectively. It is set to be about 20% shorter than in the mode.

The control means 101 causes the discriminating means 100 to set the number of light receiving sections 5a arranged in a line.
Only when it is determined that the amount of received light is out of the proper light amount range continuously, a connection determination process for determining the presence of a defective object is performed, and the plurality of inspection modes are different. The control parameter includes the value of the set number of the light receiving units 5a in the connection determination processing. Specifically, as illustrated in FIG. 13A, in the brown rice k, a portion of the germ kg that is opaque to the transmitted light remains, so that it is avoided to determine the germ kg as a defective. For this reason, the control unit 101 determines that the light receiving amount of the set number (for example, five) of the light receiving units 5a is the only one in the brown rice inspection mode and the light receiving information of the plurality of light receiving units 5a provided in the transmission line sensor 5A. When it is determined that the proper light amount range has been continuously deviated, a connection determination process for determining the presence of a defective object is performed. In other words, the number of the light receiving portions 5a that are continuously out of the appropriate light amount range when the portion of the embryo kg is received is set to a maximum of four, and as a result of the above connection discrimination processing, the four light receiving portions 5a as shown in FIG. When 5a continuously deviates from the appropriate light amount range, it is prevented from being erroneously determined to be defective. Therefore, the line sensor 5B for reflection in the brown rice inspection mode, and the line sensor 5A for transmission and reflection in the rice inspection mode,
The connection determination processing is not performed on the light reception information of the light receiving unit 5a of 5B.

Next, a description will be given of a correction process for setting the appropriate light amount range for each inspection object (polished rice and brown rice). In a state where the illumination light amounts from the illumination light sources 5A and 5B are sufficiently stable, as shown in FIGS. 14 and 15, a long product having the same transmittance and reflectance as the proper product (normal rice) in the rice grain group k is used. Is positioned at the detection position J, and the transmission and reflection line sensors 5A, 5A,
Each piece of light receiving information received by 5B is obtained as reference light receiving amount information. That is, for each light receiving section 5a of each sensor 5A, 5B,
Reference received light amount Si of transmitted light and reference received light amount Si 'of reflected light
(I = 0 to [the number of light-receiving parts-1]), and at the same time, average values Sm, Sm for the reference light-receiving amounts Si, Si '.
m ′ is obtained (this process is called “reference data creation”). Here, the inspection reference material Kj is formed of a resin plate or the like of a color corresponding to each inspection object (polished rice and brown rice), and is provided for each inspection object (polished rice and brown rice).
Are exchanged, and the above-mentioned “reference data creation” is performed.

Also, a change in the amount of illumination light from the illumination light sources 5A and 5B is detected. Specifically, in a state where the illumination light amount is sufficiently stable, as shown in FIG.
The output voltage r [i] (i = 0 to [the number of light-receiving portions−1]) of each light-receiving portion 5a of the reflection line sensor 5B that receives the reflected light from B is measured as a reference illumination light amount value. An average value rm for all light receiving units is obtained in advance (this process is referred to as “illumination light correction data creation”). On the other hand, at the latest time when the actual inspection is performed, the output voltage r '[i] of each light receiving section 5a of the reflection line sensor 5B that receives the reflected light from the reflection reflector 8B is measured, and the total light reception is performed. The average value rm 'of the part is obtained, and the ratio (rm' / rm) of the average value rm of the reference illumination light value to the average value rm 'of the latest illumination light value is defined as the change rate of the illumination light amount.

In order to obtain a stable state of the illumination light quantity, the reference light quantity is measured after a sufficient time elapses after lighting at the time of shipment adjustment or the like. At the time of the actual inspection operation, a time interval for performing the cleaning operation is set (for example, 3.
0 minutes) After performing the inspection and the time of the cleaning interval elapses,
Since the windows 14A and 14B are cleaned by the cleaning unit C, the illumination light amount is measured after the cleaning.

Then, for each sensor output voltage j of the transmitted light and the reflected light, the reference light receiving amount Si, Si 'of each light receiving section 5a with respect to the average value Sm, Sm' of the reference light receiving amount is cancelled. In order to multiply the average value Sm, Sm 'of the light quantity by the ratio of the reference light receiving quantity Si, Si' of each light receiving section 5a, and to cancel the influence of the fluctuation of the light quantity, the change rate of the light quantity (rm '/ rm) ), The corrected output voltage jt of the transmitted light sensor 5B (sensor correction output) and the corrected output voltage jh of the reflected light sensor 5A (sensor correction output) Get.

[0047]

## EQU1 ## Sensor correction output jt = j × (Sm / Si) ×
(Rm / rm ′) Sensor correction output jh = j × (Sm ′ / Si ′) × (rm
/ Rm ')

Next, a sensitivity correction process is performed on the sensor correction outputs jt and jh. Here, the sensitivity value is set to a standard value (100). When the sensitivity value is set to a value larger than 100 (for example, 110) during the actual inspection operation, the deviation (jt−Sm) of each sensor correction output jt, jh from the average value Sm, Sm ′ of the reference light receiving amount. ), (Jh-
When the sensitivity value is set to a value smaller than 100 (for example, 90), the deviations (jt-Sm) and (jh-Sm ') are reduced. Then, the sensitivity correction outputs jk and jk 'of the transmitted light and the reflected light whose detection light reception amount is corrected to decrease are obtained.

[0049]

## EQU2 ## Sensitivity correction output jk = (sensitivity value / 100) × (j
t−Sm) + (Sm) Sensitivity correction output jk ′ = (sensitivity value / 100) × (jh−S
m ') + (Sm')

That is, the controller 10 changes and sets a correction coefficient (sensitivity value) for increasing or decreasing the amount of light received from the transmission and reflection line sensors 5A and 5B (jt and jh in the above equation). , The sensitivity of the received light amount with respect to the appropriate light amount range is corrected. Then, when the sensitivity value is increased to more than 100 and the amount of received light is increased,
The increased amount of received light is likely to be out of the appropriate light amount range, and the sensitivity of defect determination is increased. On the other hand, if the sensitivity value is reduced to less than 100 and the amount of received light is reduced, the decreased corrected amount of received light becomes the appropriate amount of light. The sensitivity of the received light amount to the appropriate light amount range of the transmitted light and the reflected light is corrected so that it is difficult to deviate from the range and the sensitivity of the defect determination is reduced.

Next, the setting of the appropriate light quantity range will be described in detail. Using the operation panel 21a provided on the console 21, the units SU1 to SU4 are sequentially selected to set the appropriate light quantity range. Perform the operation. First, when the main power switch 21b is turned on and operated, the operation panel 2 is turned on.
1a is the initial screen shown in FIG. 17, and the initial screen includes four unit number displays 60, each unit S
U1, 2, 3, 4 processing speed set value 61, feeder 9
The current state of the set value 62 of the flow rate and the set value 63 of the sensitivity is shown. Here, the three units SU1, SU2, and SU3 are used for inspection objects from outside.
The primary sorting is performed at a high processing speed, and for the defectives after the primary sorting by the three units SU1, SU2, and SU3, the process of secondary sorting of non-defective products is performed at the unit SU4 at a low processing speed. I have. Further, at the lower part of the screen, a display location 65 of the cumulative use time of the light source and a display location 66 of the current operation mode (in the figure, “Brown rice 1” is illustrated) are provided. In the exclusion rate display area 64, when the exclusion operation is actually performed, the frequency of the exclusion operation is displayed as a bar graph.

Then, a setting change key 6 at the lower right of the initial screen
When a finger or the like is touched on the screen 7, the screen is switched to a setting change screen shown in FIG. 18. The setting change screen includes an operation mode switching setting key 70, a feeder key 71 for setting the flow rate of the feeder 9, and a feeder / exclusion switch. An ON / OFF key 72, a clock key 73 for time adjustment, a key 74 for setting the sensitivity, a key 75 for setting a light source stabilization time, a key 75 for setting a cleaning interval, and a manual exclusion key 77 are provided. A monitor screen key 78 for returning to the original initial screen is provided. Here, when the operation mode key 70 is touched, the screen is switched to an operation mode setting screen shown in FIG.

On the operation mode setting screen, a current mode display section 80 indicating the current operation mode (in the figure, the “Yakeuchi” mode is illustrated) and a change mode display section 81 indicating the operation mode to be changed are shown. The left and right sides of the change mode display section 81 are operated by operating the up / down key type display changes 81a and 81b provided to change the change mode display section 81.
Is switched to the display of the desired operation mode (“Brown rice 2” is illustrated in the figure), and then the setting key 83 at the lower right of the screen is displayed.
When is touched, the operation mode is switched to the operation mode displayed on the change mode display section 81. If the user touches the menu key 82 at the lower left of the screen, the screen returns to the original setting change screen.

Touching the sensitivity setting key 74 on the setting change screen (FIG. 18) switches to the sensitivity value setting screen shown in FIG. In the figure, the sensitivity values of the four units are set to the standard sensitivity value (100). The sensitivity value setting screen displays a unit display unit 34 that displays the number of each unit and is configured on a touch panel, a sensitivity display unit 35 that displays the sensitivity value of each unit, and a sensitivity that increases or decreases the sensitivity value. A value increase / decrease key 36 is provided. Then, when the user selects a unit whose sensitivity value is to be set by touching the unit display section 34 with a finger or the like, the display is inverted from positive to negative to indicate that the selection has been made. In this state, the sensitivity display section 35 is displayed.
The sensitivity value is changed and set by operating the sensitivity value increase / decrease key 36 while checking the sensitivity value. The menu key 82 is provided at the lower left of the screen, and the identification level key 84 is provided at the lower right of the screen.

When the identification level key 84 is touched, the screen is switched to an identification level setting screen shown in FIG. A unit number is displayed on the upper side of the identification level setting screen, and a unit display section 37 formed on a touch panel is provided.
, A display unit 45 for the current operation mode (in the figure, "Brown rice 1" is displayed), and a transmission / reflection key 46 for switching between transmission and reflection. In the center of the screen, a graphic display unit 47 displaying a frequency distribution (histogram) hg of the received light data, an upper limit mark 49a indicating the upper limit of the appropriate light amount range, and a lower limit mark 48a indicating the lower limit.
Are provided. At the bottom of the screen is an O for the feeder.
N key 38a, OFF key 38b, measurement key 44,
A setting key 39 and movement keys 48 and 49 for moving the upper limit display 49a and the lower limit display 48a are provided.

Then, one unit is selected in the unit display section 37, and the feeder ON key 38a and the OFF
By pressing the key 38b ON / OFF to cause a predetermined amount of rice grains k to flow down for a predetermined time, the measurement key 44 is pressed to select a measurement state, and a data group of each light reception information in the transmitted light and the reflected light is selected. Get. Then, for the received light data, the sensor correction output processing described above and the standard sensitivity value (10
A sensitivity correction output process in step 0) is performed, and a frequency distribution hg for each light reception amount from the dark side to the light side is obtained for each light reception data of the transmitted light and the reflected light after the correction.
Next, when transmission or reflection is selected with the transmission / reflection key 46, the frequency distribution hg in which the horizontal axis represents the amount of received light and the vertical axis represents the frequency for each amount of received light in the transmitted or reflected light is represented by the graphic display unit 47. Will be displayed. Then, the upper limit mark (vertical line) and the lower limit mark (vertical line) are
At 8 and 49, the mark is moved to the light side or the dark side to adjust the position of each mark with respect to the frequency distribution to an appropriate position, and then the setting key 44 is pressed. An upper limit value and a lower limit value of the appropriate light amount range are set. That is, in each of the transmitted or reflected light, the upper limit mark 4
9a and the lower limit mark 48a, the appropriate light amount range ΔEt for transmitted light or the appropriate light amount range ΔEh for reflected light
Is determined.

Next, the appropriate light amount range ΔEt,
Based on ΔEh, as shown in FIG. 22, a memory LUT (a transmitted light LUT and a transmitted light LUT) that stores determination data at the time of actual defect detection processing as a look-up table is as follows. Created. This memory LUT (LUT for transmitted light and LUT for transmitted light)
Is first created for brown rice specified in the operation mode. Similarly, the operation mode is switched to milled rice, and milled rice is also created. (1) For each light receiving unit 5a represented by position data i (i = 0 to [number of light receiving units-1]), the output voltage j of each line sensor 5A, 5B can be obtained as in the following equation. The average value Sm, Sm 'of the above-mentioned reference light receiving amount and the reference light receiving amount Si of each light receiving unit 5a are added to each value j while changing the value within a range of all values (for example, 256 levels when an 8-bit signal is used). , Si '
And the rate of change of the illumination light quantity (rm ′)
/ Rm) to obtain a correction value of the output voltage j. If the correction value is within the appropriate light amount range ΔEt, ΔEh, the memory L
"0" is stored as the judgment output in the corresponding address (i, j) of the UT, and if the value is out of the appropriate light amount range ΔEt, ΔEh,
“1” is stored as a judgment output at the corresponding address (i, j) of the memory LUT. In the actual operation, the illumination light amount is different from the first one. Therefore, the data of the change rate (rm '/ rm) of the illumination light amount is obtained for each inspection operation, and the data of the memory LUT is changed accordingly. Rewrite and use.

[0058]

## EQU3 ## Correction value of transmitted light output j = j × (Sm / Si) ×
(Rm / rm ') Correction value of reflected light output j = j * (Sm' / Si ') * (r
m / rm ')

(2) The memory LUT created above
With respect to the position data i (i = 0 to [the number of light receiving units−1]) of the light receiving unit 5a and the line sensors 5 at the position i.
When the output voltage j of each A and 5B is input, each light receiving unit 5
Regarding a, the judgment output “0” is output for a normal rice grain, and the judgment output “1” is output for a defective rice.

Next, a specific description will be given of the determination of a defective object in the light receiving output of each of the line sensors 5A and 5B for transmitted light and reflected light.

In the case of transmitted light, as shown in the corrected output waveform of the transmitted light line sensor 5A in FIG.
When the corrected output voltage corresponding to the received light amount a is within the appropriate light amount range ΔEt for the rice grain group k, the presence of normal rice grains is determined. When the output voltage is out of the set appropriate range ΔEt, defective rice grains or foreign matter is detected. Determine existence. In the figure, e0 is an output voltage level for standard transmitted light from normal rice grains. When the light amount is smaller than the appropriate light amount range ΔEt,
The presence of defective rice grains, foreign matter, etc. (for example, black stones) having a transmittance lower than that of normal rice grains is determined, and if the transmittance is larger than the appropriate light amount range ΔEt, a light having a transmittance higher than that of normal rice grains k. The presence of the defective rice grain k or the foreign matter on the side is determined. Examples of the defective rice grain k or foreign matter on the light side include:
Light colored transparent glass pieces. In FIG. 23, the output voltage (light reception amount) of the light receiving unit 5a is determined by the position where a part of the rice grain k is colored, the position of a black stone or the like (indicated by e1), and the position where a cracked body is present. (Indicated by e2), when there is a foreign substance or the like located below the appropriate light amount range ΔEt and having a transmittance higher than that of normal rice grains,
As shown in a position e <b> 4, a state where the position is located above the appropriate light amount range ΔEt is illustrated.

On the other hand, in the case of reflected light, as shown in the corrected output waveform of the line sensor 5B for reflected light in FIG.
When the corrected output voltage corresponding to the amount of light received by each light receiving unit 5a is within the appropriate light amount range ΔEh, the presence of a normal rice grain is determined. Is determined. In the figure, e0 'is an output voltage level for standard reflected light from normal rice grains. FIG. 24 shows 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 (e1).
2 ′) illustrates a state deviating downward from the appropriate light amount range ΔEh, and when a foreign substance such as a glass piece exists, the position e3 ′ is moved to the position e3 ′ by strong direct reflected light from the foreign substance. As shown in the figure, a state where the light amount deviates upward from the appropriate light amount range ΔEh is illustrated. Although not shown, the reflectance of a black stone or the like is very small, so that the waveform deviates greatly from the appropriate light amount range ΔEh downward.

The control means 101 controls the rice grain group k transferred to the detection position J of the line sensors 5A and 5B.
Among them, when it is determined that a defective rice grain or foreign matter is present, as the adjusted time interval elapses, the position of the defective rice grain or foreign matter flowing down corresponds to that position. Air is blown from each spray nozzle 6a in the section to separate the section from the path of normal rice grains.

Next, a separation operation for detecting a defective object and removing the defective object will be described with reference to flowcharts shown in FIGS. At the time of shipment adjustment (Fig. 25),
After turning on the power of the apparatus, after confirming that the illumination light amount is sufficiently stable, the following processing is performed for each inspection object (polished rice and brown rice). First, the above-mentioned “reference data creation” is performed, and further, each process of the first “illumination light correction data creation” is performed. Next, a predetermined amount of received light data is collected, sensor output correction and sensitivity correction (standard sensitivity value) are performed on the collected data, and a frequency distribution with respect to the received light amount is displayed. Then, the appropriate light amount range ΔEt,
The upper limit value and the lower limit value for ΔEh are set (“threshold value setting”), and a memory LUT is created based on the appropriate light amount ranges ΔEt and ΔEh. Finally, after a defective object is determined at the light receiving position J, a time interval until each nozzle of the air blowing device 6 is operated is set and adjusted.

At the time of normal inspection operation (FIG. 25), first,
After turning on the power of the device, various settings such as the operation mode and the sensitivity value are performed according to the inspection object (polished rice or brown rice, etc.), and the warm-up operation is performed for the set time. After that, perform the latest "illumination light correction data creation" at that time to calculate the data of the change rate of the illumination light amount,
The change rate data of the illumination light amount and the appropriate light amount range Δ
The data in the memory is rewritten using Et and ΔEh to create a memory LUT. Then, the inspection is started by supplying the rice grain group k to the chute 1 using the memory LUT after the correction. And the set cleaning interval (for example, 30 minutes)
After the lapse of time, the supply of the rice grain group k is stopped to stop the inspection, the wiper 23 is operated to clean the windows 14A and 14B, and "cleaning of illumination light correction data" after cleaning is performed to reduce the amount of illumination light. The data of the change rate is calculated, and the data in the memory is rewritten in the same manner as described above to create a memory LUT. Then, thereafter, the inspection is started by supplying the rice grain group k to the shoot 1 again using the memory LUT after the correction.

[Alternative Embodiment] In the above-described embodiment, a case is described in which one detachable reflecting member (reflecting plate for transmitted light 8A) having a plurality of types of reflecting surfaces is provided. Can be provided. For example, FIG.
As shown in the figure, the reflecting surfaces h1 and h
2 is provided with another reflecting member 8A 'having a reflecting surface h4 used for inspecting an inspection object different from the reflecting member 8A.
Or alternately install it, or
The reflecting surfaces h1 and h2 provided on the one reflecting member 8A are
Further, it can be provided in two reflecting members or can be implemented in various forms. That is, in these cases, among the plurality of types of reflecting surfaces h1, h2, and h4, the plurality of reflecting members 8A and 8A 'each having different types of reflecting surfaces h1, h2, and h4 are used. Reflective surface h
So that 1, h2 and h4 can be switched to the use state alternatively.
Alternatively, it is provided to be freely installed.

In the above embodiment, the reflection surface hm for transmitted light is used.
Is configured such that different reflecting surfaces are selectively used in accordance with the change in the type of the inspection object. However, the reflection surface hm for the reflected light is similarly changed in the type of the inspection object. May be configured such that different reflecting surfaces are used alternatively.

In the above embodiment, the light receiving means is constituted by the transmitted light receiving means (transmitted light line sensor 5A) and the reflected light receiving means (reflected light line sensor 5B). Of light receiving means. The line sensor may be an image pickup tube type television camera other than the monochrome type CCD line sensor.
Instead of a monochrome type CCD sensor, a color type CCD sensor may be used to determine the presence or absence of defective rice or foreign matter for each of the color information R, G, and B with higher accuracy.

In the above-described embodiment, the transfer means H transfers the group of granular objects as the inspection object in a state of a large number of rows extending in the width direction along the predetermined transfer path. The expected location is configured in a linear wide state, but is not limited to this. For example, the granular material group may be transported in a single line, and the portion where the single granular material group is expected to exist may be configured to have a narrow width.

Further, in the above embodiment, the separating means is constituted by the air blowing device 6 which blows air to a defective product to separate the defective product into a route different from a proper product. However, the present invention is not limited to this. For example, a means for sucking and separating defectives by air may be used.

In the above-described embodiment, the control means 101 determines the different control parameters provided in accordance with the change in the type of the inspection object in each of the inspection modes switched in accordance with the change in the type of the inspection object. It is not limited to the time interval until the separation operation after the discrimination or the value of the set number of the light receiving units in the connection discrimination processing.

Next, another embodiment of the cleaning means for cleaning the windows 14A and 14B is shown in FIGS. 27 and 28. FIG. A pair of nozzle tubes 90 for blowing air from one end of each of the windows 14A and 14B in the longitudinal direction along the longitudinal direction to remove dust and the like on the surface of the window is a mounting plate member for the light source 4C. It is attached to 28 extensions. And
Air from the air tank 15 is supplied to the nozzle pipes 90 via an air tube 91 after being interrupted by an electromagnetic valve (not shown), and the air is supplied to each nozzle pipe 90 in two rows in the vertical direction. It is configured to eject from the formed nozzle hole 90a.

In the above embodiment, the case where the granular material group as the inspection object is the rice particle group k such as polished rice or brown rice is exemplified. However, the present invention is not limited to this. Also applicable to

[Brief description of the drawings]

FIG. 1 is an overall side view of a defective object detection device and a separation device.

FIG. 2 is a side view of the main part.

FIG. 3 is a perspective view of the main part.

FIG. 4 is a block diagram of a control configuration.

FIG. 5 is a diagram showing a light receiving range of a line sensor.

FIG. 6 is a graph showing the absorbance of polished rice and brown rice.

FIG. 7 is a side view showing a sectional structure of the reflection member.

FIG. 8 is a perspective view showing a reflection surface.

FIG. 9 is a plan view showing a main part of the cleaning unit.

FIG. 10 is a side view showing a cleaning unit.

FIG. 11 is an overall front view of the inspection apparatus.

FIG. 12 is a front view of a console.

FIG. 13 is an explanatory diagram of a light receiving unit connecting process in a light receiving unit.

FIG. 14 is a side view showing a detection arrangement for creating reference data.

FIG. 15 is an output waveform diagram when creating reference data.

FIG. 16 is an output waveform diagram showing illumination light change data.

FIG. 17 is a front view showing a display example of the display panel of the console.

FIG. 18 is a front view showing a display example of a display panel.

FIG. 19 is a front view showing a display example of a display panel.

FIG. 20 is a front view schematically showing a display example of a display panel.

FIG. 21 is a front view schematically showing a display example of a display panel.

FIG. 22 is a block diagram of a memory for determining a defect;

FIG. 23 is an output waveform diagram after correction of the transmitted light line sensor.

FIG. 24 is an output waveform diagram after correction of the reflected light line sensor.

FIG. 25 is a flowchart of a control operation.

FIG. 26 is a flowchart of a control operation.

FIG. 27 is a side view showing a cleaning unit according to another embodiment.

FIG. 28 is a schematic cross-sectional plan view showing an operation state of a cleaning unit of another embodiment.

[Explanation of symbols]

 Reference Signs List 4 illuminating means 5 light receiving means 5a light receiving section 5A transmitted light receiving means 5B reflected light receiving means 6 separating means 8A reflecting member 8A 'reflecting member 100 discriminating means 101 control means hm reflecting surface hm reflecting surface for reflected light hm reflecting surface for transmitted light h1 Reflection surface for rice polishing h2 Reflection surface for brown rice h3 Reflection surface h4 Reflection surface H Means of transport J Planned location

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2G051 AA04 AB02 BA01 BA08 BB01 CA03 CA07 CB01 CB02 CC11 DA01 DA05 DA13 EA11 EA12 EA14 EA24 EA26 EB01 EB09 EC01 EC02 EC03 FA01 3F079 AC15 BA06 CA32 CA44 CB25 CB30 CB30 CB32 CB30 CB30 CC11 DA06 EA11 EA19

Claims (10)

[Claims] An illumination unit configured to illuminate a portion where the inspection object is expected to be located with the group of granular objects as an inspection object; and a light receiving unit receiving light detected by the illumination object from the inspection object. A light receiving direction of the light receiving unit, which is installed at a position on the back side of the expected existence position, and receives the light having the same or substantially the same brightness as detection light from a proper one of the inspection objects. A reflection surface that reflects toward the means, based on light receiving information of the light receiving unit that receives the detection light from the inspection object and the reflection light from the reflection surface, the amount of received light is included in the inspection object. A determination unit for determining whether or not a proper light amount range for the detection light from the proper object is out of the range, wherein the light receiving unit is configured to detect each of the granular material groups as the inspection object. Range smaller than the size of the grain A plurality of light-receiving sections as respective light-receiving target ranges are provided over the entire expected location; and the determination section performs the determination for each of the plurality of light-receiving sections provided in the light-receiving section. The reflection surface is changed as the type of the inspection object is changed, and is the same or substantially the same as the detection light from the proper object in the changed inspection object. A defective object detection device in which a plurality of types of reflection surfaces for reflecting light of brightness toward the light receiving means are selectively used. 2. The defective object detection device according to claim 1, wherein the illumination means is configured to be able to change the wavelength of the illumination light to a different wavelength in accordance with a change in the type of the inspection object. apparatus. 3. A reflecting member having a plurality of types of reflecting surfaces is provided so as to be capable of changing an installation state so as to selectively switch the plurality of types of reflecting surfaces to a use state.
Or the defective object detection device according to 2. 4. A plurality of reflecting members each having a different type of reflecting surface among the plurality of types of reflecting surfaces, so that the plurality of types of reflecting surfaces are selectively switched to a use state.
The defective object detecting device according to claim 1, wherein the defective object detecting device is provided so as to be selectively installed. 5. A reflecting member having a part of the plurality of types of reflecting surfaces is detachably installed, and the plurality of reflecting surfaces are provided at portions exposed when the reflecting member is detached. The defective object detection device according to claim 1, wherein a reflection surface of a type different from a reflection surface provided in the reflection member is provided among the types of reflection surfaces. 6. A separating apparatus provided with the defective object detecting device according to claim 1, wherein the particle group as the inspection object is set along the predetermined transfer path. A transfer means for transferring to an existing location and a separation location on the lower side of the route than the location of the planned existing location; and transferring a proper product and a defective product of the group of granular bodies transferred to the separation location to different routes. Separating means for separating, and control means for controlling the operation of the separating means based on the discrimination information of the discriminating means are provided, wherein the control means responds to a change in the type of the inspection object. A separation device configured to be selectively switched to a plurality of inspection modes having different control parameters. 7. The different control parameters provided in the plurality of inspection modes include a time interval from when the presence of a defective object is determined at the expected location to when the separating unit is operated. 7. The separation device according to 6. 8. The planned existence position is set in a straight line, and the plurality of light receiving portions provided in the light receiving means are arranged in a line corresponding to the linear planned existence position. The control means determines the presence of a defective object only when the determination means determines that the light receiving amount of the set number of light receiving portions arranged in a line continuously falls outside the appropriate light amount range. The separation device according to claim 6, wherein the connection determination process is performed, and the different control parameters included in the plurality of inspection modes include a value of a set number of light receiving units in the connection determination process. 9. A reflection light receiving means for receiving reflected light of the illumination light from the illumination means reflected by the inspection object as the light receiving means, and an illumination light from the illumination means transmitting through the inspection object. Transmitted light receiving means for receiving the transmitted light, and a reflection surface for reflected light is provided as the reflection surface, in the light receiving direction of the reflected light reception means and on the back side of the expected existence position, and A reflection surface for transmitted light is provided in a light receiving direction of the transmitted light receiving unit and on a back side of the expected location; The granular material group as the inspection object is changed to polished rice and brown rice, and only the reflection surface for transmitted light corresponds to each of the polished rice and brown rice. The spirit formed as And a use reflecting surface and brown rice reflecting surface, they are separating apparatus according to any one of claims 6-8, which is configured to freely alternatively used. 10. The control means switches to a rice inspection mode and a brown rice inspection mode in response to the inspection object being changed to the milled rice and brown rice, respectively.
10. The separation apparatus according to claim 9, wherein in the brown rice inspection mode, the connection determining process is performed only on light reception information of the plurality of light receiving units provided in the transmitted light receiving unit.