TWI802732B - Grain quality distinguishing device - Google Patents

Abstract

An object of the present invention is to provide a grain quality distinguishing device capable of accurately distinguishing the quality of the external appearance of a grain placed on a transparent sample tray by preventing the appearance of light source glare on a bottom section of the sample tray. The grain quality distinguishing device of the present invention irradiates light onto a grain placed on a sample tray with a transparent bottom such that light passes through the grain, and distinguishes the quality of the external appearance of the grain based on the light transmitted through the grain, wherein an illumination mechanism having a light source is disposed beneath the sample tray, and the illumination mechanism irradiates indirect light onto the grain placed on the sample tray. In the present invention, it is preferable that the illumination mechanism has light source blocks disposed at an oblique angle below the sample tray, light sources are disposed inside the light source blocks, and the illumination mechanism reflects the light from the light sources inside the light source blocks, thereby illuminating the grain placed on the sample tray from below at an oblique angle with indirect light.

Description

Grain Grade Discrimination Device

The present invention relates to a grain grade discriminating device for discriminating the appearance grades of grains such as rice, wheat, beans, and corn. In particular, the present invention relates to a grain grade judging device that has an illumination mechanism that prevents light from being reflected on the bottom of the sample tray, and that can judge the appearance grade of the grains placed on the sample tray with good accuracy.

In the past, the following devices have been widely known: irradiating light to grains, causing the light to penetrate the grains and/or reflect on the grains, and discriminate the light based on the transmitted light and/or reflected light from the grains. Appearance grades of grains (see Patent Documents 1 and 2).

Patent Document 1 describes a device including an imaging mechanism, which is equipped with an upper imaging lighting unit, a lower lighting unit, and a tray on which an arbitrary number of grains, which are objects of discrimination, are arranged between them, and photographs the image of the lighting unit from above. The upper light-emitting part irradiates light to the grains placed on the tray and uses the upper photographing lighting unit to photograph the reflected light, or the lower light-emitting part of the lower lighting unit irradiates light to the above-mentioned grains. Grain and use the upper shooting lighting unit to shoot its penetrating light, and obtain the image data formed by the reflected light or penetrating light from the aforementioned grain.

In addition, Patent Document 2 describes a device comprising: a base member; a rotating member disposed rotatably inside the base member and having a light source on one side; The base member together forms an outer frame, and is located above the rotating member, and has an opening for receiving a sample tray loaded with grains; and the sample tray loaded with a plurality of grains is arranged on the cover member. The opening part is used to irradiate light from obliquely below to the transparent bottom surface of the aforementioned sample tray by means of the aforementioned light source, so that the light can penetrate the plurality of grains placed on the aforementioned sample tray from obliquely below.

According to the device described in the above-mentioned patent document 1, it is possible to judge by comparing the image data formed by the reflected light or transmitted light from the grain obtained by the camera mechanism with the reference image data for grain inspection. The appearance grade of the aforementioned grains.

Moreover, according to the device described in the above-mentioned Patent Document 2, the presence or absence of shadows in the grains can be observed from the top of the sample pan by the operator's vision, etc., and the cracked rice and the like can be detected.

However, the device described in Patent Document 1 is a device in which the tray is placed on the lower light-emitting part, which has the following problem: the lower light-emitting part is reflected on the bottom of the tray, and the valley obtained by the camera mechanism Because of the influence of image data of grains, it is impossible to judge the appearance grade of grains with good accuracy.

On the other hand, in the device described in Patent Document 2, the light source is arranged on the lower side of the sample plate, and the light is irradiated to the bottom surface of the sample plate from obliquely below, but the light source is not directed to the side of the sample plate. In the case of a remote configuration, there will be the following problems: the aforementioned light source is reflected on the bottom of the aforementioned sample tray, which will affect the observation of the grain by the operator from above the sample tray, etc., and thus cannot be detected correctly. Measuring carcass cracked rice and so on.

[Prior Technical Literature] 〔Patent Document〕

Patent Document 1: Japanese Patent Laid-Open No. 2015-7606

Patent Document 2: Japanese Patent Laid-Open No. 2014-173884

Therefore, the object of the present invention is to provide a grain grade judging device, which can judge the appearance grade of the grains placed on the above-mentioned sample pan with good accuracy by avoiding the light source from being reflected on the bottom of the transparent sample pan.

In order to achieve the above object, one embodiment of the present invention is a grain grade discrimination device, which irradiates light to the grains placed on a sample tray with a transparent bottom, so that the light penetrates the grains, and based on the The penetrating light of grains is used to judge the appearance grade of the aforementioned grains, which is characterized in that a lighting mechanism with a light source is arranged under the aforementioned sample plate, The aforementioned lighting mechanism irradiates indirect light to the grains placed on the aforementioned sample tray.

One embodiment of the present invention is preferably as follows.

The lighting mechanism has a light source block arranged obliquely below the sample tray, and the light source is arranged inside the light source block, and the lighting mechanism reflects light from the light source on the inside of the light source block, and The grains placed on the sample pan were irradiated from obliquely below as indirect light.

One embodiment of the present invention is preferably as follows.

The aforementioned light source block is provided with: a fixing part, which fixes the aforementioned light source; a light guide part, which is located on the upper part of the aforementioned fixing part, and extends toward the center side of the aforementioned sample tray, and directs the direct light from the aforementioned light source toward the bottom of the aforementioned sample tray. (direct light) to block and reflect it; and the reflecting part, located at the lower part of the aforementioned fixing part, reflects the direct light from the aforementioned light source or the reflected light from the aforementioned light guide part; and the aforementioned lighting mechanism makes the light from the aforementioned light source The light is reflected on the inner surfaces of the respective parts of the light source block, and is irradiated as indirect light to the grains placed on the sample tray from obliquely below.

One embodiment of the present invention is preferably as follows.

A black reflector serving as the background is arranged under the sample tray, and on the other hand, the lighting mechanism is arranged adjacent to the outside of the black reflector, and the inside of each part of the light source block is placed The sides are set to white.

One embodiment of the present invention is preferably as follows.

The said illuminating means is arrange|positioned plurally at the oblique bottom of the said sample tray, and the light from the said light source is irradiated to the grain mounted on the said sample tray from a plurality of directions as indirect light.

One embodiment of the present invention is preferably as follows.

The aforementioned grain grade discriminating device irradiates light onto the grains placed on the sample tray with a transparent bottom surface, makes the light penetrate the aforementioned grains and/or reflect on the aforementioned grains, and based on the penetration from the aforementioned grains Light and/or reflected light are used to judge the appearance grade of the above-mentioned grains, wherein, an upper lighting mechanism with an upper light source is arranged obliquely above the aforementioned sample tray, and the aforementioned upper lighting mechanism has: a fixing part for fixing the aforementioned upper light source; The side light-shielding part is located under the upper light source, and blocks the direct light from the upper light source toward the sample plate and makes it reflect upward; the upper side light-shielding part is located above the upper light source, and The direct light from the upper light source facing upward and the reflected light reflected by the lower light shielding part are blocked and reflected downward; Indirect light is irradiated from obliquely above to the grains placed on the sample tray.

One embodiment of the present invention is preferably as follows.

The above-mentioned upper lighting mechanism is provided with multiple ones on the inner surface of a cylindrical body, and the light from the above-mentioned upper light source is used as indirect light to irradiate the grains placed on the above-mentioned sample tray from multiple directions.

One embodiment of the present invention is preferably as follows.

Each of the light-shielding parts is made black, and on the other hand, the inner surface of the cylindrical body is white below the upper side light-shielding part and black above the upper side light-shielding part.

One embodiment of the present invention is preferably as follows.

Above the above-mentioned upper side light-shielding part, and inside the above-mentioned cylindrical body, a black light-shielding plate has a circular opening, and has a function to adjust the amount of transmitted light and/or reflected light from the aforementioned grains. Aperture function.

In the grain grade discriminating device according to one embodiment of the present invention, since the illumination mechanism irradiates the light from the light source as indirect light to the grains placed on the sample tray from obliquely below, it is possible to prevent the light source from being reflected on the sample tray. bottom of.

Therefore, according to the grain grade discriminating device of one embodiment of the present invention, based on the transmitted light from the grain, the appearance grade of the grain placed on the sample tray can be discriminated with good accuracy.

In addition, in the grain grade discriminating device according to one embodiment of the present invention, since the lighting mechanism irradiates the grains placed on the sample tray from obliquely below with the light from the light source as indirect light, it is not necessary to avoid the reflection of the light source. On the bottom of the sample tray, the illumination mechanism is arranged sideways away from the center of the sample tray.

Therefore, according to the grain grade discrimination|determination apparatus which concerns on one Embodiment of this invention, it can prevent that an apparatus enlarges in order to prevent a light source from being reflected on the bottom of a sample pan.

In the grain grade discriminating device according to an embodiment of the present invention, since the lighting mechanism has a light source block arranged obliquely below the sample tray, and the light source is arranged inside the light source block, the lighting mechanism will The light from the light source is reflected on the inside of the light source block, and is irradiated obliquely from below to the grains placed on the sample tray as indirect light. Therefore, the lighting mechanism can transmit the light from the light source with a simple configuration. Defined as indirect light.

In addition, the grain grade discriminating device according to one embodiment of the present invention is suitable for detecting cracked grains and the like because the light from the light source is irradiated obliquely downward to the grains placed on the sample tray.

The grain grade discriminating device of one embodiment of the present invention only needs to determine that the light source block has: a fixing part for fixing the light source; a light guide part located on the upper part of the fixing part and extending toward the center side of the sample tray , to block and reflect the direct light (direct light) from the aforementioned light source towards the bottom of the aforementioned sample plate; The reflected light of the light part is reflected; and the aforementioned lighting mechanism reflects the light from the aforementioned light source on the inner surface of each of the aforementioned parts of the aforementioned light source block, and irradiates the grains placed on the aforementioned sample tray from obliquely below as indirect light, Then, the range where the light source is reflected on the bottom of the sample plate can be narrowed by the light guide part, so the device can be miniaturized.

In addition, in the grain grade discriminating device according to one embodiment of the present invention, since the lighting mechanism can guide most of the light from the light source to the reflection portion of the light source block, effective use of light can be achieved.

In the grain grade discrimination device according to one embodiment of the present invention, a black reflector serving as a background is arranged under the sample pan, and on the other hand, the illuminating mechanism is arranged adjacent to the black reflector. The outside of the board, and the inner surfaces of the aforementioned parts of the light source block are set to white, then the light of the aforementioned light source can be effectively reflected by the white inner surfaces of the aforementioned parts of the light source block for effective application. In addition, most of the light incident from the illuminating unit to the black reflection plate as the background is indirect light, so that reflection from the black reflection plate can prevent the light source from being reflected on the bottom of the sample plate.

In the grain grade discrimination device according to one embodiment of the present invention, as long as the illumination means are arranged in plural at the obliquely below the sample pan, the light from the light source is irradiated to the sample pan from plural directions as indirect light. The placed grains can detect cracked grains, etc. with good accuracy regardless of the orientation of the grains.

In the grain grade discrimination device according to one embodiment of the present invention, the upper illuminating mechanism should reflect the light from the upper light source on the lower light shielding part and the upper light shielding part, and irradiate it as indirect light from obliquely above to the sample plate placed on it. grains, it can avoid the aforementioned upper light source from being reflected on the aforementioned sample plate.

Therefore, according to the grain grade discriminating device of one embodiment of the present invention, the appearance grade of the grains placed on the sample tray can be discriminated with good accuracy based on the transmitted light and/or reflected light from the grains.

In addition, in the grain grade discriminating device according to one embodiment of the present invention, as long as the upper lighting mechanism reflects the light from the upper light source on each light-shielding part, and irradiates it as indirect light from obliquely above to the sample tray. If the grain is placed, it is not necessary to arrange the above-mentioned upper lighting mechanism from the center of the sample tray to the side 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 device of one embodiment of the present invention, it is possible to prevent the size of the device from being reflected on the bottom of the sample pan in order to avoid the light source.

The grain grade discriminating device according to one embodiment of the present invention is provided that the above-mentioned upper lighting mechanism is provided in plural on the inner surface of the cylinder, and the light from the above-mentioned upper light source is irradiated to the above-mentioned sample tray from a plurality of directions as indirect light. The placed grains can be used to judge the appearance grade with good accuracy regardless of the orientation of the grains.

In the grain grade discriminating device according to one embodiment of the present invention, it is only necessary that each of the light-shielding parts is set in black, and on the other hand, among the inner surfaces of the cylinder body, the lower part than the upper side light-shielding part is set in white. If the upper side of the upper side light shielding part is set to be black, the light of each of the aforementioned upper light sources can be effectively used by the white inner surface of the aforementioned cylindrical body below the aforementioned upper side light shielding part. Also, the present invention acquires the images of the grains placed on the sample tray from above the cylinder body, but because the black inner surface above the upper side light-shielding part prevents the above-mentioned upper light sources from being blurred. The light goes around the top of the aforementioned cylinder so that a sharp image of the aforementioned grains can be obtained.

The grain grade discriminating device of one embodiment of the present invention is provided above the above-mentioned upper side light-shielding part and inside the above-mentioned cylindrical body: a black light-shielding plate has a circular opening, and has The aperture function to adjust the amount of transmitted light and/or reflected light; when the image of the grains placed on the sample plate is obtained from the top of the cylinder, the sharpness of the grains can be obtained. image. And, can utilize the size of the aforementioned opening of changing aforementioned black light-shielding plate, and adjustment can obtain. The scope of the image of the grains placed on the aforementioned sample tray effectively prevents the aforementioned light source or the aforementioned upper light source from being reflected on the bottom of the aforementioned sample tray.

According to the present invention, a grain grade judging device is provided, which can judge the appearance grade of the grains placed on the above-mentioned sample pan with high precision by avoiding the light source from being reflected on the bottom of the transparent sample pan.

1: Grain grade discrimination 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 Department

23: Black reflector (background)

24: Opening

3: Cylinder for upper lighting

30: Upper lighting mechanism

31: Upper light source (LED)

32: Lower side shading block

321: fixed part

322: lower side shading part

33: Upper side shading block

331: upper side shading part

34: cover body

35: opening

4: transparent basin

5: Image acquisition mechanism (sensor)

101: Grain grade discrimination device

A-A: section line (indicating the section position and viewing direction in Figure 3)

B-B: section line (indicates the section position and viewing direction of Figure 5)

Fig. 1 is a schematic explanatory diagram of a grain grade discrimination device.

Fig. 2 is an explanatory diagram of the lower lighting mechanism.

Fig. 3 is a sectional view of A-A of Fig. 2 .

Fig. 4 is an explanatory diagram of the upper lighting mechanism.

Fig. 5 is a B-B sectional view of Fig. 4 .

Fig. 6 is an explanatory diagram of another example of the lower lighting mechanism.

Fig. 7 is a schematic explanatory diagram of another grain grade discriminating device.

Fig. 8 is a schematic explanatory diagram of a modified example of the grain grade discriminating device of Fig. 1 .

[Preferable form of implementing the invention]

Embodiments of the present invention will be described based on the drawings.

Fig. 1 shows a schematic explanatory diagram of a grain grade discriminating device in an embodiment of the present invention.

The grain grade discrimination|determination apparatus 1 shown in FIG. 1 is provided with the storage part 2 for lower lighting, and the cylinder 3 for upper lighting.

The lower lighting storage unit 2 has a rectangular space in plan view, and accommodates the lower lighting mechanism 20 along the side surface. Here, an example in which two sets of lower lighting mechanisms 20 are housed is shown.

A circular opening 24 is provided at the center of the upper portion of the lower lighting storage unit 2 , and a circular transparent basin 4 made of a transparent material is placed on the opening 24 . In addition, a black reflection plate 23 serving as a background is arranged at the bottom of the storage unit 2 for lower lighting and below the transparent basin 4 .

The lower lighting mechanism 20 is arranged obliquely below the transparent pot (sample tray with a transparent bottom) 4, and irradiates light to the grains placed in the transparent pot 4 from obliquely below.

The aforementioned lower lighting mechanism 20 may also be disposed directly under the aforementioned transparent basin 4 as shown in FIG. 8 described later. In this case, the lower lighting mechanism 20 is configured using a member of the same color as the black reflector 23 and functions as a background.

The upper illuminating cylinder 3 has a cylindrical shape, and is disposed on the upper portion of the lower illuminating housing 2 so as to be concentric with the opening 24 .

An upper lighting mechanism 30 is provided on the inner surface of the upper lighting cylinder 3 . Here, four sets of upper lighting mechanisms 30 (one set is omitted from illustration) are shown in the circumferential direction.

Among the above-mentioned upper illuminating cylinders 3, the upper part is closed by a cover 34, and through the opening 35 provided in the center of the cover 34, the above-mentioned transparency is obtained by an image acquisition mechanism (sensor) 5 such as a camera. Image data of the grains placed on the pot 4.

The above-mentioned upper lighting mechanism 30 is arranged obliquely above the above-mentioned transparent pot 4, and irradiates light to the grains placed on the above-mentioned transparent pot 4 from obliquely above.

Fig. 2 is an explanatory diagram of the lower lighting mechanism, and shows a light source block. FIG. 3 shows a sectional view along line A-A of FIG. 2 .

The aforementioned lower lighting mechanism 20 has a lower light source 21 and a strip-shaped light source block 22 .

The aforementioned light source block 22 has: a fixing part 221, which fixes the aforementioned lower light source 21; 21 The direct light (direct light) towards the bottom of the aforementioned transparent basin 4 is blocked and reflected downward.

Also, the aforementioned light source block 22 has: a reflecting portion 223, positioned at the lower portion of the aforementioned fixing portion 221, and the upper surface is inclined downward toward the center side of the aforementioned transparent basin 4, so that the direct light from the aforementioned lower light source 21 or from the The reflected light of the aforementioned light guiding portion 222 is reflected.

The lower lighting mechanism 20 reflects the light from the lower light source 21 on the aforementioned parts of the light source block 22, and irradiates the light from the reflecting portion 223 or through the black reflecting plate 23 as indirect light from obliquely below to the transparent basin. 4. The grains contained therein.

The aforementioned lower lighting mechanism 20 can reduce the area where the aforementioned lower light source 21 is reflected on the bottom of the transparent basin 4 by the aforementioned light guide portion 222, thus contributing to the miniaturization of the device.

In addition, the lower lighting mechanism 20 can guide most of the light from the lower light source 21 to the reflection portion 223 of the light source block 22 , so that the light can be effectively used.

Here, in the light source block 22 , the inner surfaces of the fixed part 221 , the light guide part 222 , and the reflective part 223 are set in white.

Moreover, the said lower lighting mechanism 20 is arrange|positioned adjacent to the bottom part of the said lower lighting storage part 2, and is arrange|positioned outside the said black reflector 23. As shown in FIG.

The aforementioned lower lighting mechanism 20 can effectively reflect the light of the aforementioned lower light source 21 through the white inner surfaces of the aforementioned parts of the aforementioned light source block 22 for effective application.

Also, because most of the light incident from the lower lighting mechanism 20 to the black reflector 23 becomes indirect light, it is possible to prevent the reflection from the black reflector 23 from causing the lower light source 21 to be reflected on the bottom of the transparent basin 4 .

The above-mentioned lower lighting mechanism 20 only needs to have more than one lower light source 21 , and if there are multiple lower light sources 21 , it can be linearly fixed in the long-side direction of the light source block 22 .

Moreover, although the LED (light emitting diode) light source was used for the said lower light source 21, the light source other than an LED light source can also be used.

In addition, the aforementioned lower lighting mechanism 20 irradiates the light from the aforementioned lower light source 21 to the grains placed in the transparent basin 4 from obliquely below, so it is suitable for detecting cracked grains and the like.

Fig. 4 shows an explanatory view of the upper lighting mechanism. Fig. 5 shows a B-B sectional view of Fig. 4 .

The upper lighting mechanism 30 includes: an upper light source 31 ; a lower shading block 32 fixed to the inner surface of the upper lighting cylinder 3 ; and an upper shading block 33 .

The above-mentioned lower side light-shielding block 32 has: a fixing part 321, which fixes the above-mentioned upper light source 31; Direct light from the basin 4 is blocked and reflected upwards.

The lower side shading block 32 is fixed to the inner surface of the upper illuminating cylinder 3 at the fixing portion 321 .

The above-mentioned upper side light-shielding block 33 is equipped with: an upper side light-shielding part 331, which is set to be placed or fixed on the above-mentioned upper light source 31 and on the aforementioned fixing part 321 of the aforementioned lower side light-shielding block 32. Direct light (direct light) directed upward and reflected light reflected by the lower side light shielding portion 322 are blocked and reflected downward.

Here, the above-mentioned upper side light-shielding block 33 uses a ring-shaped member defined to have a circular opening in the center and is common to the four upper lighting mechanisms 30, but it can also be used for each upper lighting mechanism 30. Individually independent.

The upper lighting mechanism 30 reflects the light from the upper light source 31 on the light shielding parts 322, 331 of the lower light shielding block 32 and the upper light shielding block 33, and irradiates the light from obliquely above to the transparent light as indirect light. The grains placed in the basin 4 can prevent the aforementioned upper light source 31 from being reflected on the bottom of the aforementioned transparent basin 4 .

Here, the lower side light-shielding block 32 and the aforementioned upper side light-shielding block 33 are set in black.

Moreover, among the inner surfaces of the above-mentioned upper illuminating cylinder 3, the lower surface of the upper side light-shielding block 33 (upper side light-shielding part 331) is set to be white, and the lower surface of the above-mentioned upper side light-shielding block 33 (upper side light-shielding part 331) is white. ) is set to black on the lower surface and above.

The upper lighting mechanism 30 can effectively use the light from the upper light sources 31 through the white inner surface of the upper lighting cylinder 3 that is lower than the lower surface of the upper light shielding block 33 .

Again, though the opening 35 provided at the center of the aforementioned cover body 34 from the top of the above-mentioned upper illuminating cylinder 3, the image data of the grains placed on the aforementioned transparent basin 4 are obtained by an image acquiring mechanism 5 such as a camera. However, because the light of each of the above-mentioned upper light sources 31 is prevented from going around above the above-mentioned upper illuminating cylinder 3 by the black inner surface above the lower surface of the above-mentioned upper side light-shielding block 33, the vividness of the aforementioned grains can be obtained. image data.

In addition, although the cylinder body 3 for upper lighting is used, the thing of the rectangular cylinder shape, such as a square cylinder shape, can also be used, for example.

In addition, although LED (light emitting diode) light sources are used for the above-mentioned upper light source 31, light sources other than LED light sources may be used.

The action of the grain grade discriminating device in the embodiment of the present invention will be described.

First, the transparent pot 4 on which grains are placed is positioned on the opening 24 provided in the upper center of the storage part 2 for lower lighting.

Next, in the lower lighting mechanism 20 and/or the upper lighting mechanism 30, the LEDs of the lower light source 21 and/or the upper light source 31 are lighted respectively, and the light is irradiated to the above-mentioned grains placed in the above-mentioned transparent basin 4, so that the light passes through. through the aforementioned grains and/or reflect in the aforementioned grains.

And, through the opening 35 provided on the lid body 34 of the cylinder body 3 for upper lighting, the penetration image and/or reflection image of the grains placed in the transparent basin 4 are obtained by the image acquisition mechanism 5 .

The aforementioned grain grade discriminating device 1 extracts shape information such as shape, area, length, width, and color (color information (R, G, B) , Milky white, etc.), cracks and other optical information, and based on the reflection image obtained above, shape information such as shape, area, length, width, etc. are extracted, and then the appearance of the aforementioned grains is judged based on the shape information and optical information extracted above. class.

The lower lighting mechanism 20 irradiates the grains placed in the transparent basin 4 obliquely from below with the light from the lower light source 21 as indirect light, so that the reflection of the lower light source 21 on the transparent basin 4 can be avoided. bottom.

Also, the above-mentioned upper lighting mechanism 30 can prevent the above-mentioned upper light source 31 from being reflected on the above-mentioned transparent basin because the light from the above-mentioned upper light source 31 is irradiated to the grains placed on the aforementioned transparent basin 4 from obliquely above as indirect light. 4 bottom.

Therefore, according to the aforementioned grain grade discriminating device 1 , the appearance grade of the grains placed in the transparent basin 4 can be discriminated with high precision based on the transmitted light and/or reflected light from the grains.

In the aforementioned grain grade discriminating device 1, because the aforementioned lower lighting mechanism 20 irradiates the light from the aforementioned lower light source 21 as indirect light to the grains placed in the aforementioned transparent basin 4 from obliquely below, it is not necessary to prevent the aforementioned The lower light source 21 is reflected on the bottom of the transparent basin 4 and the lower lighting mechanism 20 is arranged sideways from the center of the transparent basin 4 .

Also, in the above-mentioned grain grade discriminating device 1, because the above-mentioned upper lighting mechanism 30 irradiates the light from the above-mentioned upper light source 31 as indirect light to the grains placed on the above-mentioned transparent basin 4 from obliquely above, it is not necessary to To prevent the upper light source 31 from being reflected on the bottom of the transparent basin 4 , the upper lighting mechanism 30 is arranged sideways from the center of the transparent basin 4 .

Therefore, according to the said grain grade discrimination|determination apparatus 1, in order to prevent the bottom light source 21 and the upper part light source 31 from being reflected on the bottom of the transparent basin 4, it can prevent that an apparatus enlarges.

In addition, the above-mentioned grain grade discriminating device 1 can be arranged above the above-mentioned upper side light-shielding block 33 and inside the cylinder body 3 for the above-mentioned upper lighting: a black light-shielding plate has a circular opening and has a An aperture function (not shown) for adjusting the amount of transmitted light and/or reflected light from the aforementioned grains.

As long as the above-mentioned grain grade discriminating device 1 is provided with the aforementioned black shading plate with a diaphragm function inside the above-mentioned upper illuminating cylinder 3, the opening 35 provided on the cover 34 of the above-mentioned upper illuminating cylinder 3 When the transmission image and/or reflection image of the said grain placed on the said transparent basin 4 are acquired by the image acquisition means 5, the clear image of the said grain can be acquired. Also, the size of the aforementioned opening of the aforementioned black shading plate with aperture function can be changed to adjust the range in which the image of the grains placed in the aforementioned transparent basin 4 can be obtained, so it is effective in avoiding the aforementioned lower light source 21 or the aforementioned The upper light source 31 is reflected on the bottom of the aforementioned transparent basin 4 .

Among the above-mentioned embodiments of the present invention, the situation in which the aforementioned grain grade discriminating device 1 stores two sets of lower lighting mechanisms 20 in the aforementioned lower lighting storage portion 2 is taken as an example, but at least one set of lower lighting mechanisms 20 only needs to be accommodated. . Also, in the case where the aforementioned lower lighting storage unit 2 accommodates four groups of lower lighting mechanisms 20 at equal intervals of 90 degrees, if the light sources of the four groups of lower lighting mechanisms 20 are sequentially turned on to obtain each penetrating image, or a simultaneous point Bright four groups of light sources of the aforementioned lower lighting mechanism 20 and obtain the penetrating image, then can detect the cracked grain etc. with good precision regardless of the orientation of the grain.

FIG. 6 is an explanatory diagram of another example of the lower lighting mechanism, and shows a cross-sectional view of a light source block.

In the lower lighting mechanism 20 shown in FIG. 6 , the upper surface of the reflector 223 of the light source block 22 is roughly parallel to the bottom of the lower lighting storage portion 2 , which is the same as that shown in FIG. 2 and FIG. 3 . Institutions 20 are different.

The lower lighting mechanism 20 shown in FIG. 6 is also the same as the lower lighting mechanism 20 shown in FIG. 2 and FIG. The reflective plate 23 irradiates the grain placed on the transparent tub 4 from obliquely below as indirect light.

Fig. 7 shows a schematic explanatory diagram of a grain grade discriminating device in another embodiment of the present invention.

The grain grade discriminating device 101 shown in FIG. 7 is equipped with the storage part 2 for the lower lighting, and only has the lower lighting mechanism 20, and does not have the cylinder for the upper lighting. This point is the same as the grain grade shown in FIG. 1 The discrimination device 1 is different.

The grain grade discrimination device 101 shown in FIG. 7 is similar to the device described in Japanese Patent Application Laid-Open No. 2014-173884, and is suitable for visual inspection of cracked rice and the like.

The grain grade discriminating device 101 shown in Figure 7 also uses the light from the lower light source 21 as indirect light to irradiate the grains placed in the transparent basin 4 from obliquely below, so that the above-mentioned lower light source 21 can be avoided. The bottom of the aforementioned transparent pot 4, and based on the penetrating light from the grains, the appearance grade of the aforementioned grains can be judged with good accuracy.

Fig. 8 is a schematic explanatory diagram showing a modified example of the grain grade discriminating device shown in Fig. 1 .

Among the grain grade discriminating device 1 shown in Fig. 8, the lower lighting mechanism 20 is arranged directly under the transparent basin 4, which is different from the grain grade discriminating device shown in Fig. 1 . In this case, the aforementioned lower lighting mechanism 20 is configured such that a circular cup-shaped light source block 22 that fixes the lower light source 21 on the inside is stored in the lower lighting storage portion 2 in an upside-down manner, and the aforementioned light source area The outer surface of the block 22 is set in black to function as a background. The accommodating portion 2 for lower lighting may also be defined as a circular space in plan view.

In the grain grade discriminating device 1 shown in FIG. 8 , the aforementioned lower lighting mechanism 20 reflects the light from the aforementioned lower light source 21 on the inner surface of the aforementioned light source block 22 and the aforementioned lower lighting storage portion 2, and acts as an indirect light. The light is irradiated to the grains placed in the aforementioned transparent basin 4 from below.

The grain grade discriminating device 1 shown in FIG. 8 can also prevent the aforementioned lower light source 21 from being reflected on the bottom of the aforementioned transparent basin 4, so the appearance of the aforementioned grains can be discriminated with good accuracy based on the penetrating light from the grains. class.

In addition, in the example shown in FIG. 8 , the upper lighting mechanism 30 is omitted, but it can also be determined that the upper lighting mechanism 30 is provided on the inner surface of the upper lighting cylinder 3 similarly to the grain grade discrimination device shown in FIG. 1 . .

Also, the grain grade discriminating device 1 shown in FIG. 8 may also be configured without the cylinder body 3 for upper illumination as the grain grade discriminating device 101 shown in FIG. 7 .

The grain grade discriminating device in the embodiment of the present invention is not limited to discriminating the appearance grade of rice grains, but can be used to discriminate the appearance grades of various grains.

The present invention is not limited to the above-mentioned embodiments, and its configuration can be appropriately changed without departing from the scope of the invention.

〔Industrial Utilization〕

The grain grade judging device of the present invention can judge the appearance grade of the grains placed on the sample tray with good accuracy by avoiding the light source being reflected on the bottom of the transparent sample tray, and has excellent practicability.

1: Grain grade discrimination device

2: Storage part for lower lighting

20: Lower lighting mechanism

23: Black reflector (background)

24: Opening

3: Cylinder for upper lighting

30: Upper lighting mechanism

34: cover body

35: opening

4: transparent basin

5: Image acquisition mechanism (sensor)

Claims (8)

A device for classifying grain grades, which irradiates light onto grains placed on a sample tray with a transparent bottom, makes the light penetrate the grains, and judges the appearance of the grains based on the penetrating light from the grains grade, wherein an illumination mechanism with a light source is arranged below the sample tray, the illumination mechanism has a light source block arranged obliquely below the sample tray, and the light source is arranged inside the light source block, The lighting mechanism reflects the light from the light source on the inner side of the light source block, and irradiates the grains placed on the sample tray from obliquely below as indirect light, so as to prevent the light source from being reflected on the transparent surface of the sample tray. bottom surface. For example, the grain grade discrimination device of item 1 of the scope of the patent application, wherein, the light source block is equipped with: a fixed part, which fixes the light source; extending to block and reflect the direct light from the light source toward the bottom of the sample plate; and the illumination mechanism reflects the light from the light source on the inner surfaces of the above-mentioned parts of the light source block, and irradiates the grains placed on the sample tray from obliquely below as indirect light. The grain grade discrimination device of claim 2 of the scope of the patent application, wherein a black reflective plate serving as a background is arranged under the sample pan, and on the other hand, the lighting mechanism is arranged adjacent to the black reflective plate and set the inner surfaces of the aforementioned parts of the light source block to white. The grain grade discrimination device according to any one of items 1 to 3 in the scope of the patent application, wherein, the lighting mechanism is arranged in a plurality of obliquely below the sample tray, and the light from the light source is used as indirect light from the plurality of lighting mechanisms. Direction to irradiate the grains placed on the sample tray. The grain grade discriminating device according to any one of items 1 to 3 of the scope of the patent application, wherein the grain grade discriminating device irradiates light onto the grains placed on a sample tray with a transparent bottom surface, and uses The light penetrates the grain and/or is reflected on the grain, and judges the appearance grade of the grain based on the penetrating light and/or reflected light from the grain. The upper lighting mechanism on the upper light source, the upper lighting mechanism has: a fixing part, which fixes the upper light source; a lower light-shielding part, which is located below the upper light source, and blocks the direct light from the upper light source towards the sample tray and make it reflect upward; and the upper light shielding part is located above the upper light source, and blocks the direct light upward from the upper light source and the reflected light reflected by the lower light shielding part and makes it go toward reflection from below; and the upper lighting mechanism reflects the light from the upper light source on each of the light-shielding parts, and irradiates the grains placed on the sample tray from obliquely above as indirect light. For example, the grain grade discriminating device of item 5 of the scope of the patent application, wherein the upper lighting mechanism is provided with a plurality of sets on the inner surface of the cylinder, and the light from the upper light source is irradiated to the sample from multiple directions as indirect light The grains placed on the plate. Such as the grain grade discrimination device of item 6 of the scope of the patent application, wherein, Each of the light shielding parts is made black, and on the other hand, of the inner surface of the cylindrical body, the lower side than the upper side light shielding part is made white, and the upper side than the upper side light shielding part is made black. For example, the grain grade discriminating device of item 6 of the patent scope of the application, wherein, above the upper side shading part and inside the cylinder, a black shading plate with a circular opening is arranged to adjust the The amount of light transmitted and/or reflected by the grain.

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