CN112534244A - Grain grade discriminating device - Google Patents
Grain grade discriminating device Download PDFInfo
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- CN112534244A CN112534244A CN201980052351.8A CN201980052351A CN112534244A CN 112534244 A CN112534244 A CN 112534244A CN 201980052351 A CN201980052351 A CN 201980052351A CN 112534244 A CN112534244 A CN 112534244A
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- light
- light source
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/85—Investigating moving fluids or granular solids
Abstract
The invention aims to provide a grain grade discriminating device which can discriminate the appearance grade of grains carried on a transparent sample plate with good precision by avoiding the light source from showing on the bottom of the sample plate. The present invention is a grain grade discrimination device for irradiating light to grains placed on a sample tray having a transparent bottom surface, allowing the light to penetrate the grains, and discriminating the appearance grade of the grains based on the penetration light from the grains, wherein an illumination means having a light source is disposed below the sample tray, and the illumination means irradiates indirect light to the grains placed on the sample tray. In the present invention, it is preferable that the illumination mechanism includes a light source block disposed obliquely below the sample plate, the light source is disposed inside the light source block, and the illumination mechanism reflects light from the light source inside the light source block and irradiates grain placed on the sample plate obliquely below as indirect light.
Description
Technical Field
The present invention relates to a grain grade discriminating device for discriminating the appearance grade of grains such as rice, wheat, beans, and corn. The invention particularly relates to a grain grade discriminating device which comprises: the device is provided with an illuminating mechanism which can avoid the light source from showing on the bottom of the sample plate, and can judge the appearance grade of the grains carried on the sample plate with good precision.
Background
Conventionally, the following devices are known: the method is a method of judging the appearance grade of grain by irradiating the grain with light, transmitting the light to the grain and/or reflecting the light to the grain, and discriminating the appearance grade of the grain based on the transmitted light and/or the reflected light from the grain (see patent documents 1 and 2).
Further, patent document 2 describes an apparatus including: a base member; a rotating member rotatably disposed in the base member and having a light source on one side; and a cover member attached to the base member to form an outer frame together with the base member, the cover member being positioned above the rotary member and having an opening for supporting a sample tray on which grains are placed, the sample tray on which a plurality of grains are placed being provided in the opening of the cover member, and the light source being configured to irradiate light onto a transparent bottom surface of the sample tray from obliquely below and to transmit light through the plurality of grains placed on the sample tray from obliquely below.
According to the device described in patent document 1, the appearance grade of the grain can be determined by comparing image data obtained by reflected light or transmitted light from the grain and acquired by the imaging means with reference image data for grain inspection.
Further, according to the apparatus described in patent document 2, the operator can visually observe the presence or absence of a shadow in grains from above the sample tray to detect broken rice or the like in the main body.
However, the device described in patent document 1 has the following problems in that the tray is placed on the lower light emitting section: the lower light emitting unit is displayed on the bottom of the tray, and affects the image data of the grain acquired by the imaging unit, so that the appearance grade of the grain cannot be determined with high accuracy.
On the other hand, in the apparatus described in patent document 2, the light source is disposed on the side of the lower portion of the sample plate, and the light is irradiated to the bottom surface of the sample plate from obliquely below, but when the light source is not disposed so as to be distant to the side of the sample plate, there is a problem as follows: the light source is reflected on the bottom of the sample plate, and affects observation of grains by visual observation of an operator above the sample plate, and thus, broken rice or the like cannot be accurately detected.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2015-7606
Patent document 2: japanese patent laid-open No. 2014-173884
Disclosure of Invention
Problems to be solved by the invention
Accordingly, an object of the present invention is to provide a grain grade discriminating device capable of discriminating the external appearance grade of grains placed on a transparent sample tray with high accuracy by preventing a light source from being reflected on the bottom of the sample tray.
Means for solving the problems
In order to achieve the above object, one embodiment of the present invention is a grain grade discriminating device for irradiating light to grains placed on a sample tray having a transparent bottom surface, allowing the light to penetrate the grains, and discriminating the appearance grade of the grains based on the penetration light from the grains,
an illumination mechanism having a light source is disposed below the sample plate,
the illumination means irradiates indirect light to the grains placed on the sample tray.
One embodiment of the present invention is preferably as follows.
The illumination mechanism has a light source block arranged obliquely below the sample plate, and the light source is arranged inside the light source block,
the illumination mechanism reflects light from the light source inside the light source block and irradiates the grain placed on the sample tray from obliquely below as indirect light.
One embodiment of the present invention is preferably as follows.
The light source block includes: a fixing part for fixing the light source; a light guide portion that is positioned above the fixing portion and extends toward the center of the sample plate to shield and reflect direct light (direct light) directed from the light source toward the bottom of the sample plate; and a reflection unit located below the fixing unit and reflecting the direct light from the light source or the reflected light from the light guide unit,
the illumination mechanism reflects light from the light source on the inner surface of each portion of the light source block, and irradiates the grain placed on the sample tray obliquely from below as indirect light.
One embodiment of the present invention is preferably as follows.
A black reflecting plate serving as a background is disposed below the sample tray, the illumination means is disposed adjacent to the outside of the black reflecting plate, and the inner side surfaces of the respective portions of the light source block are white.
One embodiment of the present invention is preferably as follows.
The illumination means is disposed in plurality obliquely below the sample plate, and irradiates the grain placed on the sample plate with light from the light source as indirect light from a plurality of directions.
One embodiment of the present invention is preferably as follows.
The grain grade discrimination device irradiates light to grains placed on a sample tray having a transparent bottom surface, transmits and/or reflects the light to the grains, and discriminates the appearance grade of the grains based on the transmitted and/or reflected light from the grains,
an upper illumination mechanism having an upper light source is disposed obliquely above the sample plate,
the upper illumination mechanism includes: a fixing part for fixing the upper light source; a lower light shielding part located below the upper light source, and configured to shield direct light from the upper light source toward the sample tray and reflect the direct light upward; an upper light shielding portion located above the upper light source, for shielding direct light directed upward from the upper light source and reflected light reflected by the lower light shielding portion and reflecting downward;
the upper illumination means reflects light from the upper light source at each of the light-shielding portions, and irradiates the grain placed on the sample tray from obliquely above as indirect light.
One embodiment of the present invention is preferably as follows.
The upper illumination means is provided in plurality on the inner surface of the cylindrical body, and irradiates the grains placed on the sample tray with light from the upper light source as indirect light from a plurality of directions.
One embodiment of the present invention is preferably as follows.
The light-shielding portions are black, and the inner surface of the cylindrical body is white below the upper light-shielding portion and black above the upper light-shielding portion.
One embodiment of the present invention is preferably as follows.
A black light shielding plate having a circular opening and having a diaphragm function for adjusting the amount of transmitted and/or reflected light from the grain is disposed above the upper light shielding portion and inside the cylindrical body.
In the grain grade discrimination apparatus according to an embodiment of the present invention, the illumination means illuminates the grain placed on the sample tray from below with light from the light source as indirect light, so that the light source is prevented from being reflected on the bottom of the sample tray.
Therefore, according to the grain grade discrimination device of the embodiment of the present invention, the appearance grade of the grain placed on the sample tray can be discriminated with high accuracy based on the penetrating light from the grain.
In the grain grade determination device according to the embodiment of the present invention, the illumination means is configured to illuminate the grain placed on the sample tray from below as indirect light, and therefore, the illumination means does not need to be disposed so as to be laterally extended from the center of the sample tray in order to avoid the light source from being reflected on the bottom of the sample tray.
Therefore, according to the grain grade discrimination apparatus of an embodiment of the present invention, it is possible to prevent the apparatus from being enlarged in order to prevent the light source from being reflected on the bottom of the sample plate.
In the grain grade determination device according to an embodiment of the present invention, the illumination means has a light source block disposed obliquely below the sample plate, the light source is disposed inside the light source block, and the illumination means reflects light from the light source inside the light source block and irradiates grain placed on the sample plate obliquely from below as indirect light.
Further, the grain grade discrimination apparatus according to an embodiment of the present invention is suitable for detecting broken grains or the like in the main body by irradiating the grain placed on the sample tray with light from the light source obliquely downward.
The grain grade determination device according to an embodiment of the present invention is provided as long as the light source block includes: a fixing part for fixing the light source; a light guide unit which is positioned above the fixing unit, extends toward the center of the sample plate, and shields and reflects direct light (direct light) directed from the light source toward the bottom of the sample plate; and a reflecting portion located below the fixing portion and reflecting direct light from the light source or reflected light from the light guide portion, wherein the illumination mechanism reflects light from the light source on an inner surface of each portion of the light source block and irradiates grain placed on the sample tray from obliquely below as indirect light, and the light guide portion can reduce a range in which the light source is reflected on the bottom portion of the sample tray, thereby enabling the device to be miniaturized.
In the grain grade determination device according to an embodiment of the present invention, the illumination means may guide most of the light from the light source to the reflection portion of the light source block, and thus, effective light utilization may be realized.
In the grain grade discrimination device according to an embodiment of the present invention, the illumination means is disposed adjacent to the outside of the black reflector, and the inner side surfaces of the respective portions of the light source block are white, so that the light from the light source can be effectively reflected by the white inner side surfaces of the respective portions of the light source block, and the grain grade discrimination device can be effectively applied. Further, since most of the light incident from the illumination means on the black reflecting plate serving as a background is indirect light, the light source is prevented from being reflected by the black reflecting plate and being reflected on the bottom of the sample tray.
In the grain grade discrimination apparatus according to an embodiment of the present invention, when the illumination means is provided in plurality in an obliquely lower position of the sample plate, and irradiates the grain placed on the sample plate with the light from the light source as indirect light from a plurality of directions, the cracked grain or the like of the main body can be detected with high accuracy regardless of the orientation of the grain.
In the grain grade discrimination device according to an embodiment of the present invention, the upper light source is prevented from being reflected on the sample plate as long as the upper illumination mechanism reflects light from the upper light source at the lower light-shielding portion and the upper light-shielding portion and irradiates grain placed on the sample plate from obliquely above as indirect light.
Therefore, according to the grain grade discrimination device of an embodiment of the present invention, the appearance grade of the grain placed on the sample tray can be discriminated with high accuracy based on the penetrating light and/or the reflected light from the grain.
Further, in the grain grade discrimination apparatus according to an embodiment of the present invention, as long as the upper illumination means reflects light from the upper light source at each of the light-shielding portions and irradiates grain placed on the sample tray obliquely from above as indirect light, it is not necessary to arrange the upper illumination means so as to be laterally extended from the center of the sample tray in order to avoid the upper light source from being reflected on the bottom of the sample tray.
Therefore, according to the grain grade discrimination apparatus of an embodiment of the present invention, it is possible to prevent the apparatus from being enlarged in order to prevent the light source from being reflected on the bottom of the sample plate.
In the grain grade discrimination device according to an embodiment of the present invention, the upper illumination means is provided in plural on the inner surface of the cylindrical body, and irradiates the grain placed on the sample tray with the light from the upper light source as indirect light from plural directions, so that the grain grade can be discriminated with high accuracy regardless of the orientation of the grain.
In the grain grade discrimination device according to an embodiment of the present invention, if each of the light-shielding portions is black, and on the other hand, if the lower portion of the inner surface of the cylindrical body than the upper light-shielding portion is white and the upper portion of the inner surface of the cylindrical body is black, the light of each of the upper light sources can be effectively applied through the white inner surface of the cylindrical body below the upper light-shielding portion. Further, in the present invention, an image of grain placed on the sample tray is obtained from above the cylinder, but since light from the upper light sources can be prevented from being diffracted above the cylinder by the black inner surface above the upper light-shielding portion, a clear image of the grain can be obtained.
The grain grade discrimination device according to an embodiment of the present invention is arranged above the upper light shielding part and inside the cylinder: a black light shielding plate having a circular opening and having a diaphragm function of adjusting the amount of transmitted light and/or reflected light from the grain; the clear image of the grain can be obtained when the image of the grain placed on the sample tray is obtained from above the cylinder. In addition, the size of the opening of the black light shielding plate can be changed to adjust the range for acquiring the images of the grains carried on the sample plate, thereby effectively preventing the light source or the upper light source from being reflected on the bottom of the sample plate.
Effects of the invention
The present invention provides a grain grade discriminating device which can discriminate the appearance grade of grains placed on a transparent sample plate with good precision by preventing a light source from being reflected on the bottom of the sample plate.
Drawings
FIG. 1 is a schematic explanatory view of a grain grade discriminating device.
Fig. 2 is an explanatory view of the lower illumination mechanism.
Fig. 3 is a sectional view a-a of fig. 2.
Fig. 4 is an explanatory view of the upper illumination mechanism.
Fig. 5 is a sectional view B-B of fig. 4.
Fig. 6 is an explanatory diagram of another example of the lower illumination mechanism.
FIG. 7 is a schematic explanatory view of another grain grade discriminating device.
Fig. 8 is a schematic explanatory view of a modification of the grain grade discriminating device of fig. 1.
Detailed Description
Embodiments of the present invention are explained based on the drawings.
Fig. 1 is a schematic explanatory view of a grain grade discriminating device according to an embodiment of the present invention.
The grain grade discrimination device 1 shown in fig. 1 includes a lower illumination housing part 2 and an upper illumination cylinder 3.
The lower illumination housing section 2 has a rectangular space in a plan view, and houses the lower illumination mechanism 20 along a side surface. Here, an example of housing two sets of lower illumination mechanisms 20 is shown.
A circular opening 24 is provided at the center of the upper portion of the lower illumination housing 2, and a circular transparent bowl 4 made of a transparent material is placed on the opening 24. Further, a black reflecting plate 23 serving as a background is disposed on the bottom of the lower illumination housing section 2 and below the transparent bowl 4.
The lower illumination means 20 is disposed obliquely below the transparent pot (sample plate having a transparent bottom) 4, and irradiates the grains placed on the transparent pot 4 with light from obliquely below.
As shown in fig. 8, the lower illumination means 20 may be disposed directly below the transparent tub 4. In this case, the lower illumination means 20 is formed of a member having the same color as the black reflecting plate 23, and functions as a background.
The upper illumination cylinder 3 is cylindrical and is disposed concentrically with the opening 24 at the upper portion of the lower illumination housing 2.
An upper illumination mechanism 30 is provided on the inner surface of the upper illumination cylinder 3. Here, four sets (one set is not shown) of the upper illumination means 30 are provided in the circumferential direction.
The upper part of the upper illumination cylinder 3 is closed by a cover 34, and image data of grains placed on the transparent pot 4 is acquired by an image acquisition means (sensor) 5 such as a camera through an opening 35 provided at the center of the cover 34.
The upper illumination mechanism 30 is disposed obliquely above the transparent pot 4, and irradiates the grains placed on the transparent pot 4 with light from obliquely above.
Fig. 2 is an explanatory view of the lower illumination mechanism, and shows a light source block. Fig. 3 shows a cross-sectional view a-a of fig. 2.
The lower illumination mechanism 20 includes a lower light source 21 and an elongated light source block 22.
The light source block 22 includes: a fixing part 221 for fixing the lower light source 21; and a light guide unit 222 located at the upper end of the fixing unit 221, extending toward the center of the transparent pot 4, and reflecting direct light (direct light) directed from the lower light source 21 toward the bottom of the transparent pot 4 downward while blocking the direct light.
In addition, the light source block 22 includes: and a reflection unit 223 positioned below the fixing unit 221, having an upper surface inclined downward toward the center of the transparent tub 4, and reflecting the direct light from the lower light source 21 or the reflected light from the light guide unit 222.
The lower illumination means 20 reflects the light from the lower light source 21 at each of the light source blocks 22, and irradiates the grain placed on the transparent pot 4 obliquely downward from the reflection portion 223 or as indirect light via the black reflection plate 23.
The lower illumination means 20 can reduce the range of the lower light source 21 reflected on the bottom of the transparent pot 4 by the light guide part 222, thereby contributing to the miniaturization of the device.
In addition, since the lower illumination means 20 can guide most of the light from the lower light source 21 to the reflection portion 223 of the light source block 22, the light can be effectively used.
Here, the inner surfaces of the fixing portion 221, the light guide portion 222, and the reflection portion 223 of the light source block 22 are white.
The lower illumination means 20 is disposed adjacent to the outer side of the black reflecting plate 23 at the bottom of the lower illumination housing section 2.
The lower illumination means 20 can effectively reflect the light of the lower light source 21 by the white inner surfaces of the respective portions of the light source block 22 and can be effectively applied.
Further, since most of the light incident on the black reflecting plate 23 from the lower illumination mechanism 20 is indirect light, the lower light source 21 is prevented from being reflected by the black reflecting plate 23 and being reflected on the bottom of the transparent pot 4.
The lower illumination mechanism 20 may have one or more lower light sources 21, and in the case of having a plurality of lower light sources 21, the lower illumination mechanism may be fixed linearly in the longitudinal direction of the light source block 22.
The lower light source 21 is an LED (light emitting diode) light source, but a light source other than an LED light source may be used.
The lower illumination means 20 irradiates the grain placed on the transparent pot 4 with light from the lower light source 21 from obliquely below, and is therefore suitable for detecting a broken grain or the like in the body.
Fig. 4 is an explanatory view of the upper illumination mechanism. Fig. 5 shows a cross-sectional view B-B of fig. 4.
The upper illumination mechanism 30 includes: an upper light source 31; a lower light shielding block 32 fixed to the inner surface of the upper illumination cylinder 3; and an upper light-shielding block 33.
The lower light-shielding block 32 includes: a fixing portion 321 for fixing the upper light source 31; and a lower light shielding portion 322 provided in an L shape below the fixing portion 321, for shielding direct light from the upper light source 31 toward the transparent bowl 4 and reflecting the direct light upward.
The lower light shielding block 32 is fixed to the inner surface of the upper illumination cylinder 3 at the fixing portion 321.
The upper light-shielding block 33 includes: the upper light shielding portion 331 is provided so as to be placed or fixed above the upper light source 31 and the fixing portion 321 of the lower light shielding block 32 blocks direct light (direct light) directed upward from the upper light source 31 and reflected light reflected by the lower light shielding portion 322 and reflects the direct light and the reflected light downward.
Here, the upper light-shielding block 33 is a single annular member having a circular opening at the center and is common to the four upper illumination mechanisms 30, but a member different from each of the upper illumination mechanisms 30 may be used.
The upper illumination mechanism 30 reflects the light from the upper light source 31 by the light shielding portions 322 and 331 of the lower light shielding block 32 and the upper light shielding block 33, and irradiates the grain placed on the transparent pot 4 obliquely from above as indirect light, thereby preventing the upper light source 31 from being reflected on the bottom of the transparent pot 4.
Here, the lower light-shielding block 32 and the upper light-shielding block 33 are black.
Further, the lower surface of the inner surface of the upper illumination cylinder 3 with respect to the lower surface of the upper light-shielding block 33 (upper light-shielding portion 331) is white, and the upper surface of the inner surface of the upper illumination cylinder 3 with respect to the lower surface of the upper light-shielding block 33 (upper light-shielding portion 331) is black.
The upper illumination mechanism 30 can effectively use the light of the upper light sources 31 by the white inner surface of the upper illumination cylinder 3 below the lower surface of the upper light-shielding block 33.
Further, although the image data of the grain placed on the transparent pot 4 is acquired from above the upper illumination cylinder 3 through the opening 35 provided at the center of the cover 34 by the image acquiring means 5 such as a camera, the clear image data of the grain can be acquired because the light of each upper light source 31 can be prevented from being detoured above the upper illumination cylinder 3 by the black inner surface above the lower surface of the upper light shielding block 33.
The upper illumination cylindrical body 3 is cylindrical, but may be square, for example, rectangular.
The upper light source 31 is an LED (light emitting diode) light source, but a light source other than an LED light source may be used.
The operation of the grain grade discrimination device in the embodiment of the present invention will be described.
First, the transparent pot 4 on which grains are placed is provided so as to be positioned on the opening 24 provided in the center of the upper portion of the lower illumination housing 2.
Next, the lower illumination means 20 and/or the upper illumination means 30 respectively turn on the LEDs of the lower light source 21 and/or the upper light source 31, and irradiate the grains placed on the transparent pot 4 with light so that the light passes through and/or is reflected by the grains.
Then, a transmission image and/or a reflection image of the grain placed on the transparent pot 4 is acquired by the image acquiring means 5 through the opening 35 of the cover 34 provided in the upper illumination cylinder 3.
The grain grade discrimination apparatus 1 extracts, by a microcomputer (not shown), shape information such as an outer shape, an area, a length, and a width, optical information such as a color (color information (R, G, B), a milky white color), and a body break from the obtained through image, extracts shape information such as an outer shape, an area, a length, and a width from the obtained reflected image, and discriminates the outer appearance grade of the grain based on the extracted shape information and optical information.
The lower illumination means 20 irradiates the grain placed on the transparent pot 4 obliquely from below with the light from the lower light source 21 as indirect light, so that the lower light source 21 is prevented from being reflected on the bottom of the transparent pot 4.
Further, since the upper illumination means 30 irradiates the grain placed on the transparent pot 4 obliquely from above with the light from the upper light source 31 as indirect light, the upper light source 31 is prevented from being reflected on the bottom of the transparent pot 4.
Therefore, according to the grain grade discrimination device 1, the appearance grade of the grain placed on the transparent pot 4 can be discriminated with high accuracy based on the transmitted light and/or the reflected light from the grain.
Since the lower illumination means 20 of the grain grade determination device 1 irradiates the grain placed on the transparent pot 4 obliquely downward with the light from the lower light source 21 as indirect light, it is not necessary to arrange the lower illumination means 20 so as to be laterally extended from the center of the transparent pot 4 in order to avoid the lower light source 21 from being reflected on the bottom of the transparent pot 4.
Further, since the upper illumination means 30 of the grain grade determination device 1 irradiates the grain placed on the transparent pot 4 obliquely from above as indirect light from the upper light source 31, it is not necessary to arrange the upper illumination means 30 so as to be laterally extended from the center of the transparent pot 4 in order to avoid the upper light source 31 from being reflected on the bottom of the transparent pot 4.
Therefore, according to the grain grade discrimination apparatus 1, it is possible to prevent the apparatus from being enlarged in size in order to prevent the lower light source 21 and the upper light source 31 from being reflected on the bottom of the transparent pot 4.
Further, the grain grade discrimination device 1 may be configured such that a black light shielding plate having a circular opening and having a diaphragm function not shown for adjusting the amount of light of transmitted light and/or reflected light from the grain is disposed above the upper light shielding block 33 and inside the upper illumination cylinder 3.
In the grain grade discriminating device 1, if the black light blocking plate having a diaphragm function is disposed inside the upper illumination cylinder 3, a clear image of the grain can be obtained when the penetration image and/or the reflection image of the grain placed on the transparent pot 4 is obtained by the image obtaining means 5 through the opening 35 of the cover 34 provided in the upper illumination cylinder 3. Further, since the size of the opening of the black shade plate having the aperture function can be changed to adjust the range in which the image of the grain placed on the transparent pot 4 can be obtained, it is effective to prevent the lower light source 21 or the upper light source 31 from being reflected on the bottom of the transparent pot 4.
In the above-described embodiment of the present invention, the grain grade discrimination device 1 is exemplified as a case where two sets of the lower illumination means 20 are housed in the lower illumination housing section 2, but at least one set of the lower illumination means 20 may be housed. In the case where four sets of the lower illumination means 20 are housed in the lower illumination housing section 2 at equal intervals of 90 degrees, if the light sources of the four sets of the lower illumination means 20 are sequentially turned on to obtain the respective penetration images, or the light sources of the four sets of the lower illumination means 20 are simultaneously turned on to obtain the penetration images, the subject cracked grains and the like can be detected with high accuracy regardless of the orientation of the grains.
Fig. 6 is an explanatory view of another example of the lower illumination mechanism, showing a cross-sectional view of the light source block.
The lower illumination mechanism 20 shown in fig. 6 is different from the lower illumination mechanism 20 shown in fig. 2 and 3 in that the upper surface of the reflection portion 223 of the light source block 22 of the lower illumination mechanism 20 is substantially parallel to the bottom of the lower illumination housing portion 2.
The lower illumination mechanism 20 shown in fig. 6 is also similar to the lower illumination mechanism 20 shown in fig. 2 and 3, and reflects light from the lower light source 21 inside the light source block 22, and irradiates grain placed on the transparent pot 4 obliquely from below as indirect light via the reflection portion 223 or the black reflection plate 23.
Fig. 7 is a schematic explanatory view of a grain grade discriminating device according to another embodiment of the present invention.
The grain grade discriminating device 101 shown in fig. 7 is different from the grain grade discriminating device 1 shown in fig. 1 in that it includes the lower illumination storage part 2, only the lower illumination means 20, and no upper illumination cylinder.
The grain grade discrimination apparatus 101 shown in fig. 7 is suitable for visual inspection of broken rice or the like in a main body, as in the apparatus described in japanese patent application laid-open publication No. 2014-173884.
The grain grade discriminating device 101 shown in fig. 7 also irradiates the grain placed on the transparent pot 4 obliquely downward with the light from the lower light source 21 as indirect light, so that the lower light source 21 is prevented from being reflected on the bottom of the transparent pot 4, and the grain grade can be discriminated with high accuracy based on the transmitted light from the grain.
Fig. 8 is a schematic explanatory view of a modification of the grain grade discriminating device shown in fig. 1.
The grain grade discriminating device 1 shown in fig. 8 differs from the grain grade discriminating device shown in fig. 1 in that the lower illumination means 20 is disposed directly below the transparent pot 4. In this case, the lower illumination mechanism 20 is configured to store a circular cup-shaped light source block 22, for example, in which the lower light source 21 is fixed inside, in the lower illumination storage portion 2 in an upside-down state, and to make the outer side surface of the light source block 22 black to function as a background. The lower illumination housing 2 may have a circular space in a plan view.
In the grain grade discrimination apparatus 1 shown in fig. 8, the lower illumination means 20 reflects light from the lower light source 21 on the inner surfaces of the light source block 22 and the lower illumination housing section 2, and irradiates grain placed on the transparent pot 4 from below as indirect light.
In the grain grade discrimination apparatus 1 shown in fig. 8, since the lower light source 21 is not reflected on the bottom of the transparent pot 4, the grain can be discriminated with high accuracy in terms of the external appearance grade based on the transmitted light from the grain.
In the example shown in fig. 8, the upper illumination means 30 is omitted, but the upper illumination means 30 may be provided on the inner surface of the upper illumination cylinder 3 in the same manner as the grain grade determination device shown in fig. 1.
The grain grade discriminating device 1 shown in fig. 8 may not include the upper illumination cylinder 3, as in the grain grade discriminating device 101 shown in fig. 7.
The grain grade discrimination device in the embodiment of the present invention is not limited to discriminating the appearance grade of rice grains, and can be used to discriminate the appearance grade of various grains.
The present invention is not limited to the above embodiment, and the configuration thereof may be modified as appropriate without departing from the scope of the invention.
Industrial applicability is as follows.
The grain grade discriminating device of the present invention can discriminate the appearance grade of grains placed on a transparent sample plate with good accuracy by preventing a light source from being reflected on the bottom of the sample plate, and is excellent in practicability.
Description of the symbols
1-grain grade determination device, 2-storage part for lower lighting, 20-lower lighting mechanism, 21-lower light source (LED), 22-light source block, 221-fixed part, 222-light guide part, 223-reflection part, 23-black reflection plate (background), 24-opening part, 3-upper lighting cylinder, 30-upper lighting mechanism, 31-upper light source (LED), 32-lower shading block, 321-fixed part, 322-lower shading part, 33-upper shading block, 331-upper shading part, 34-cover, 35-opening, 4-transparent basin, 5-image acquisition mechanism (sensor), 101-grain grade determination device.
Claims (9)
1. A grain grade discriminating device for irradiating light to grains placed on a sample tray having a transparent bottom surface, transmitting the light to the grains, and discriminating the appearance grade of the grains based on the transmitted light from the grains, the grain grade discriminating device being characterized in that,
an illumination mechanism having a light source is disposed below the sample plate,
the illumination means irradiates indirect light to the grains placed on the sample tray.
2. The grain grade discriminating device according to claim 1,
the illumination mechanism has a light source block arranged obliquely below the sample plate, and the light source is arranged inside the light source block,
the illumination mechanism reflects light from the light source inside the light source block and irradiates the grain placed on the sample tray obliquely downward as indirect light.
3. The grain grade discriminating device according to claim 2,
the light source block includes: a fixing part for fixing the light source; a light guide unit which is positioned above the fixing unit, extends toward the center of the sample plate, and shields and reflects direct light from the light source toward the bottom of the sample plate; and a reflection unit which is located below the fixing unit and reflects direct light from the light source or reflected light from the light guide unit,
the illumination means reflects light from the light source on the inner surface of each of the light source blocks and irradiates the grain placed on the sample disk obliquely downward as indirect light.
4. The grain grade discriminating device according to claim 3,
a black reflecting plate serving as a background is disposed below the sample tray, the illumination means is disposed adjacent to the outside of the black reflecting plate, and the inner side surfaces of the respective portions of the light source block are white.
5. The grain grade discriminating device according to any one of claims 1 to 4,
the illumination means is disposed in plurality obliquely below the sample plate, and irradiates the grain placed on the sample plate with light from the light source as indirect light from a plurality of directions.
6. The grain grade discriminating device according to any one of claims 1 to 5,
the grain grade discriminating device irradiates light to the grain placed on the sample tray having a transparent bottom surface, transmits and/or reflects the light to the grain, and discriminates the appearance grade of the grain based on the transmitted and/or reflected light from the grain,
an upper illumination mechanism having an upper light source is disposed obliquely above the sample plate,
the upper illumination mechanism includes: a fixing part for fixing the upper light source; a lower light shielding part located below the upper light source, for blocking direct light from the upper light source to the sample tray and reflecting the direct light upward; and an upper light shielding part located above the upper light source, for shielding direct light directed upward from the upper light source and reflected light reflected by the lower light shielding part and reflecting downward,
the upper illumination means reflects light from the upper light source at the light-blocking portions, and irradiates the grain placed on the sample tray obliquely upward as indirect light.
7. The grain grade discriminating device according to claim 6,
the upper illumination means is provided in plurality on the inner surface of the cylindrical body, and irradiates the grain placed on the sample disk with light from the upper light source as indirect light from a plurality of directions.
8. The grain grade discriminating device according to claim 7,
the light-shielding portions are black, and the inner surface of the cylindrical body is white below the upper light-shielding portion and black above the upper light-shielding portion.
9. The grain grade discriminating device according to claim 7 or 8,
a black light shielding plate having a circular opening and adjusting the amount of transmitted light and/or reflected light from the grain is disposed above the upper light shielding portion and inside the cylindrical body.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-150179 | 2018-08-09 | ||
| JP2018150179A JP6981381B2 (en) | 2018-08-09 | 2018-08-09 | Grain grade discriminator |
| PCT/JP2019/030239 WO2020031847A1 (en) | 2018-08-09 | 2019-08-01 | Grain quality determination device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112534244A true CN112534244A (en) | 2021-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980052351.8A Pending CN112534244A (en) | 2018-08-09 | 2019-08-01 | Grain grade discriminating device |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6981381B2 (en) |
| CN (1) | CN112534244A (en) |
| BR (1) | BR112021002386A2 (en) |
| TW (1) | TWI802732B (en) |
| WO (1) | WO2020031847A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112888927A (en) | 2018-07-03 | 2021-06-01 | 英飞康公司 | Method for displaying substance concentration data and related device |
| JP7404895B2 (en) * | 2020-01-29 | 2023-12-26 | 株式会社サタケ | grain discriminator |
| JP7044150B1 (en) * | 2020-12-18 | 2022-03-30 | 株式会社サタケ | Reference member and grain discriminator |
| JP7355258B2 (en) * | 2020-12-23 | 2023-10-03 | 株式会社サタケ | Grain discrimination device |
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- 2019-08-01 WO PCT/JP2019/030239 patent/WO2020031847A1/en active Application Filing
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Also Published As
| Publication number | Publication date |
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| JP2020026963A (en) | 2020-02-20 |
| TW202012915A (en) | 2020-04-01 |
| TWI802732B (en) | 2023-05-21 |
| WO2020031847A1 (en) | 2020-02-13 |
| JP6981381B2 (en) | 2021-12-15 |
| BR112021002386A2 (en) | 2021-05-04 |
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