JPH01312447A - Method for judging quality of rice grain - Google Patents

Abstract

PURPOSE:To make judgment accurately by performing detections for eight items such as the average amount of reflected light based on data which are obtained by fine linear scanning of rice grains, combining the values of the eight items, and performing various analyses which are the bases for judging the quality of the rice grains. CONSTITUTION:Rice grains which are conveyed on a belt conveyer 19 is linearly scanned in the direction perpendicular to the conveying direction with lighting devices 44 and 45 and a linear image sensor 51. The average amount of reflected light, the light amount of the brightest point, the light amount of the darkest point, the light amount of the difference between the brightest point and the darkest point, the area of a region which is brighter (darker) than the average amount of the reflected light by a specified amount, a total projected area and an elliptical shape are detected based on many data at the minute detecting points of the rice grains. The detected items are appropriately combined. Skin chafed grains, immature grains, defective grains, dead grains, colored grains, foreign matters and the like which are bases for judging the quality of the rice are judged. The ratios of the values are obtained. Thus, the quality of the sample rice is automatically judged.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rice grain quality determination method for determining the quality of brown rice, polished rice, or unhulled rice.

(Prior Art) Grains such as rice grains are inspected in accordance with the agricultural product standards regulations based on the Agricultural Products Inspection Act, and compared with standard products to determine the grade. This inspection is carried out by an agricultural product inspector. The inspectors are people who are experts in grain inspection, and are trained to always make correct grading decisions, but because the inspection is done visually, it cannot be said to be perfect.

Therefore, as an apparatus for determining the powder quality of brown rice, for example,
125664, and the same method is published in Japanese Unexamined Patent Publication No. 125664.
It is disclosed in JP-153249 or JP-61-150141.

That is, in JP-A No. 56-125664, - by irradiating each grain of brown rice with visible light and measuring the difference between the reflected light and transmitted light of the light, grain size adjustment, which is the powder quality of brown rice; There is a powder quality determination device C for brown rice that attempts to distinguish between milky grains, old rice, brown rice, and North American rice.The one in JP-A No. 57-153249 uses a single grain of brown rice. In this method, the transmittance is measured, and the transmittance is compared with a predetermined threshold value to determine whether or not the grain is defective. Shino in Japanese Patent Application Laid-Open No. 62-1550141 irradiates each grain of brown rice with light, and calculates the amount of diffusely transmitted light, the amount of diffused light, and the amount of light of two arbitrary wavelengths in the diffusely reflected light. The amount of transmitted light at two positions of one grain of brown rice σ is detected, and the ratio of the amount of diffusely transmitted light to the amount of diffusely reflected light, the ratio of the amount of light at any two wavelengths in the diffusely reflected light, and the amount of light transmitted at each grain of brown rice are determined. The ratio of the amount of transmitted light at each position is calculated and the ratio of each light amount is determined and processed to determine the quality of brown rice, such as regular grains, inside the belly, milky white grains, blue immature grains, split grains, damaged grains, colored grains, and grains. This is a method for determining white dead grains.

(Problem to be solved by the invention) However, in these conventional devices and methods, the detection items that are the basis for quality judgment are only the light intensity of reflected light and transmitted light, and accurate judgment cannot be made. . In other words, it is a regular grain (normal grain), and since there are differences in reflected light and transmitted light depending on the variety, production area, or growth conditions, it is classified as a regular grain. I can't expect a verdict, so that's you.

Furthermore, in the measurement, an expert was required to set the boundary line for quality judgment. For example, (, (, foreign matter, colored grains, powdery material)
) The frequency distribution of each grade of brown rice is shown in Figure 9.1
．． Each brown rice is XN! Since the boundaries overlap in terms of direction, brightness, and amount of reflected light), it is impossible to accurately judge each quality no matter where the boundary line is placed.

In view of the above points, the technical object of the present invention is to provide a method for determining the quality of rice grains that can more accurately determine the quality of rice grains.

[Means for solving the problem] In order to solve and overcome the above-mentioned problem, in the rice grain quality determination method 1 of Honzasoaki, a. The image sensor scans and covers the rice grains in a linear direction perpendicular to the right direction of the conveyance.

[], and the average reflected light amount: the light amount of the brightest point, the light amount of the darkest point, the difference between the brightest point and the darkest point (light 1), the area of the area that is brighter by a certain maximum than the average reflected light amount, and the average reflected light amount. The area of the region darker than the setting ψ, the total projected area, and the elliptical shape are detected.

C. By appropriately combining these detected values, analysis is performed for each judgment category for quality judgment.

2. Based on the results of this analysis, the quality of the rice grains of the Zambul is determined.

For conveying the rice grains, a belt conveyor with a large number of grooves for arranging the rice grains is recommended.

In addition, there are cases in which rice grains are immediately sorted based on the analysis results of a certain quality classification category.

[Function]) The rice grains being fed are scanned linearly by a linear image sensor, and based on the data of numerous minute detection points on the rice grains, the average amount of reflected light, the amount of light at the brightest point, and the amount of light at the darkest point are determined. , detect the difference in light intensity between the brightest point and the darkest point, the area of the area that is brighter than the average reflected light amount by a certain amount or more, the area of the area that is darker than the average reflected light amount by a certain amount or more, the total projected area, and the elliptical shape, and detect these. Combining items as appropriate, it determines the grains with rough skin, immature grains, damaged grains, North American grains, colored grains, foreign substances, etc., which are the basis for determining the grade of rice, and calculates their ratios, and automatically determines the quality of the sample rice. It is something.

〔Effect of the invention〕

As described above, according to the present invention, eight items of average reflected light a'G are detected using data obtained by finely scanning rice grains in a linear manner, and these eight items are combined to perform various analyzes that serve as the basis for determining the quality of rice grains. This makes it much more accurate than conventional judgments based on single data on the entire rice grain. By combining these eight items with the detection of split grains, which have traditionally been relatively easy to detect, it becomes possible to quickly and accurately determine the grade in place of the inspection by rice inspectors.

(Embodiments of the Invention) Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

A supply hopper 2 is provided near one side of the upper surface of a cabinet 1 having a substantially rectangular parallelepiped shape, and the lower end of the supply hopper 2 is connected to the upper end of a supply 13 extending downward. A rough screening screen 4 for removing large foreign matter is installed in the upper part of the supply hopper 2, and a shutter 5 is installed in the lower part. Further, a series of weir plates 6 are provided at the upper part of the supply gutter 3 to make the flow of rice grains slow and uniform, and a wind screening section 7 is formed below the weir 6. That is, a part of the supply gutter 3 is enlarged and a branch passage 9 extending horizontally is provided, and the branch passage 9 faces outside the cabinet 1 and is further lowered to be connected to the small foreign matter receiving box 8. The small foreign matter receiving box 8 is placed on a receiving box mounting stand 1o fixed to the back surface of the cabinet 1, and the upper opening of the small foreign matter receiving box 8 and the end of the branch path 9F are detachably attached. A part of the small foreign matter receiving box 8 is covered with a filter made of cloth or the like. On the other hand, a slit 11 for blowing air is opened in the horizontal direction in the road wall located above the enlarged part of the supply gutter 3 and facing the branch path 9, and air is blown into the supply gutter 3 from this slit 11 for blowing air. An air blower t112 is provided.

A contamination prevention valve 13 is provided below the air passage section 7 in the supply gutter 3. This contamination prevention valve 13 is opened at the start of operation, and is closed after a certain period of time, so that the rice grains that return to the supply gutter 3 after the first measurement are removed from the unmeasured rice grains flowing down the lower part of the feed gutter 3. Works to prevent it from getting mixed in.

The lower end of the supply gutter 3 faces above the vibrating feeder 15. That is, the rectifying plate 14 is mounted on the vibrator 16 fixed on the base 17 via a buffer plate, and the long sleeves of rice grains are aligned in the latter half of the conveying direction of the rectifying plate 14 so as to face the conveying direction. A large number of grooves are formed. In this example, the diameter is 3 m.
15 rows of semicircular grooves with a diameter of 4 mm were formed at intervals of 4 mm. Also,
A brush 18 for aligning rice grains one by one in the groove is horizontally mounted slightly above the current plate 14.

A grooved belt conveyor 19 is provided with a very small gap from the conveyance n end of the vibrating feeder 15 . One grooved belt conveyor is composed of a timing belt, and is an endless belt having grooves in the same shape and number as the grooves formed in the rectifying plate 14 on the conveying surface. A passive pulley 20 is provided horizontally and parallel to the rectifying plate 14 at the same height.
21 and a driving pulley 22 provided approximately halfway below the driven pulley 20.21. The drive pulley 22 has two threads, and the other thread is connected to a small diameter pulley of a two thread intermediate pulley 24 via a timing belt 23, and the large diameter pulley of the intermediate pulley 24 is connected to the timing belt. Motor 2 through 25
6 motor pulley 27. Each of the pulleys is formed with teeth corresponding to each timing belt, and the rotation speed of the motor 26 (approximately 25 rpm) is lower than that of the intermediate pulley 2.
4, the speed is reduced in two stages at a gear ratio of 10:1 and transmitted to the drive pulley 22. Furthermore, a tachometer 29 is connected to the intermediate shaft 28 that supports the intermediate pulley 24.

The conveyance terminal end of the grooved belt conveyor 19 is connected to the conveyance start end of the circulation belt conveyor 31 by a connecting gutter 3o provided in a direction perpendicular to the conveyance direction of one of the grooved belt conveyors. That is, the supply port of the connecting gutter 30 is opened slightly below the conveyance terminal end of the grooved belt conveyor 19, and the gutter bottom slopes downward toward the starting end of the circulation belt conveyor 31. The circulation belt conveyor 31 is formed to have a high conveyance end side so as to return the rice grains flowing out from the grooved belt conveyor 31 into the supply gutter 3.

A passive pulley 32 is provided on the high side, and a drive pulley 33 and a passive pulley 34 are provided on the low side, and the circulating belt conveyor 31 is passed around the drive pulley 33, the motor pulley 27 of the motor 26, and the like. A motor pulley 35 which is pivoted on the side is connected to a belt 36 having a circular cross section by crossing it. Since the conveying surface of the circulation belt conveyor 31 has an upward slope of about 30'', a large number of bumps 1 are formed on the surface to prevent rice grains from being transferred.

The apex conveyance end of the circulating belt conveyor 31 is connected to a discharge gutter 37 that can separate the rice grains into two directions. That is, the discharge end of the discharge gutter 37 is
It protrudes outward and is provided with a low slope on the discharge end side, and a switching valve 3 for communicating with the supply gutter 3 is provided in the middle thereof.
8 and three circulation paths. Note that a partition wall 40 is provided between the grooved belt conveyor 19 and the circulation belt conveyor 31, standing on the base 17, in order to fix each component.

The above explanation was mainly based on the flow of rice grains, but next,
The detection device etc. will be explained in detail. Grooved belt conveyor 19
A main illumination device 44 consisting of a pair of light sources 41 and an umbrella 42 with a slit 43 opened at the center of the top is provided above.The grooved bell l at the P position is provided above. - It is formed so that the light beam is irradiated uniformly in the width direction of the conveyor 19 and from directly above. A body-side lighting device 45 is provided near the main lighting device 44 .

The trunk side illumination device 45 consists of a light source 46 and an umbrella 47,
The umbrella 47 is provided so as to be inclined so that the light from the light source 46 obliquely illuminates the P position rF1.

A lens barrel 49 containing a condensing lens 48 is provided facing downward above the slit 43 provided in the umbrella 42 of the main illumination device 44, and connected to the upper end of the lens barrel 49, a sensor box 50 is provided.

In the sensor box 50, 4096 linear image sensors are arranged in parallel, and a near image sensor array 51 is installed.
The surface of the rice grains conveyed by one grooved belt conveyor is imaged on the linear image sensor array 51 when the rice grains pass through position 1]. Note that on the back side of the grooved belt conveyor 19 at the P position, a vibration isolation roller 52 is provided to prevent the grooved belt conveyor 19 from shaking.

The items to be detected by the second eye sensor array 51 are A: average reflected light ω, B: light intensity of the brightest point, C: light intensity of the darkest point, D: the brightest point. The light amount of the difference between the point and the darkest point, E...The area of the area that is brighter than the average amount of reflected light by a certain amount or more, F...The area of the area that is darker than the average amount of reflected light by a certain amount or more, G...The total projected area and H...Oval shape. In addition, by combining these detection values, the analysis classification for determining the quality of rice grains (brown rice) obtained by -) is: - Grain size: completely good quality;
Items with no skin deviation, *Skinned grains: Brown rice with peeled or loose skin, and the area is 1mm2 or more and 3ff1m2 or less (the area of one side of one grain is 14~
15mm2), ■Immature grains: white-heart grains with a white opaque area (powdery substance) in the center, white-bellied grains with a white opaque area in the abdomen and back (the area of the powdery substance in both cases is 4 mto2 ~
8mm2) or the fruit part is not fully filled and the fruit part turns green prematurely and has no powdery appearance. Damaged grains: Damaged grains other than the split grains described below, insect damaged grains, and germination. grains, diseased grains,
Sprouted grains, brown rice, crushed grains (1/3 to 2/3 of the grain area)
3), etc., and the size of the colored part is 0.5 to 1.0 mm2
Or the grain size is 1/4 to 2/3 (4 to 1
0m1), ■ North America: The size of the powdery part is more than 1/2 (8 mm2) of the grain, and there are white dead rice and blue dead rice, ■ Colored grains: insects, It refers to grains whose surface is brown or black in whole or in part due to heat, mold, or bacteria, and the size of the colored part is 1ml12 or more, or the amount of reflected light is less than 70% of normal grains (in other words, the whole grain is Foreign matter: grains other than the rice grains to be measured, soil and sand, etc.

The relationship between the detection items and analysis categories is as shown in Table 1, and grain size adjustment and grain deviation are analyzed according to the previous detection items, and other analysis categories are performed by appropriately combining detection items. It is something.

Table 1 and above are the items detected by irradiating rice grains from the main illumination device 44 and the categories in which these items are analyzed in combination. A passing rice grain is irradiated with light from diagonally above, and the diffused reflection of the light beam by cracks that occur horizontally or vertically in the endosperm of the rice grain is detected, and cracks of 1.5+ nm or more are considered split grains. Note that this detection of the split grains is performed prior to all detection items, and the grains are immediately removed from the grooved belt conveyor 19 by a selection and removal device 53, which will be described later.

To explain in more detail with reference to the block diagram in FIG. 8, the linear image sensor array 51 linearly captures the cut surface of the rice grains at a certain moment on the P position of one grooved belt conveyor, and This linear image sensor array 51 is used as an A/D for whiteness measurement.
strange? ! ! ! 54 and a general A/D converter 55, and the whiteness measurement A/D converter 54 is connected to an image normalizing device 56.
is connected to the gray value averaging device 57 via the general A/
The D converter 55 is connected to five general-use calibrators via an image normalizing device 58. The general comparator 59 and gray value averaging device 57 are connected to an arithmetic and control device 61 via an encoder 60. On the other hand, a skin deviation comparator 62 is connected to the image normalization device 58.
2 is connected to the arithmetic and control unit 61 via an encoder 63. Further, a comparator 64 for the shell side for detecting split grains prior to these detections is connected to the image normalization device 58, and this comparator 64 for the shell side is connected to the arithmetic and control unit via the encoder 65. 61. Note that the arithmetic and control device 61 is equipped with a storage section.

Next, the sorting and removing device 53 will be described in detail (see FIG. 7). The sorting/removal device 53 is provided closer to the rear half of the conveyance than the P position of the grooved belt conveyor 19, and the suction port 67 of the suction pipe 66 faces each groove of one grooved belt conveyor. The suction pipe 66 either hangs down at right angles to the conveyance surface of the grooved bell 1 to the conveyor 19, or is provided in an inclined manner with the suction port 67 shifted toward the conveyance starting end side of the grooved bell 1 to the conveyor 19. The upper end of each suction tube 66 is connected to a conveying tube 68 that is horizontally suspended, and both the suction tube 66 and the conveying tube 68 have an inner diameter that is sufficient to allow rice grains to pass through. Further, one end of each conveying pipe 68 is connected to an air compressor (not shown), and the other end faces into six rice grain receiving boxes placed in appropriate spaces within the cabinets 1 to 1. Note that, in the cabinet 1, an opening and a door for taking out the rice grain receiving box 69 outside the machine are not shown.)
will be established. A solenoid valve 69 is interposed in each conveying pipe 68 closer to the air compressor than the suction pipe 66, and each solenoid valve 69 is configured to be operated by an output signal from the arithmetic and control device 61. In addition, a nozzle part 70 is provided in each conveying pipe 68 immediately before the suction pipe 66 is attached to the injector (1
njector). From this, when the arithmetic and control unit 61 analyzes the detection values of the linear image sensor array 51 and determines that a certain rice grain is a split grain, the six solenoid valves are activated by the signal from the arithmetic and control unit 61, and the compressed air is passes through the nozzle section 70. At this time, the pressure inside the suction pipe 66 becomes low, and the rice grains are sucked through the suction port 67 and transported to the rice grain receiving box 69 through the transport pipe 68.

Note that it is preferable that a large number of ventilation holes 71 be provided at the bottom of each groove of the grooved belt conveyor 19 to suck air from below the groove, thereby preventing rice grains other than the split grains from being sucked in.

Next, the outside of the cabinet 1 will be explained. The top surface of the cabinet 1 is provided with a supply hopper 2 which is already flat, and the four corners of the bottom surface are provided with horizontal adjustment screws 72, so that the cabinet 1 can be installed horizontally.

A power switch, an hour meter/printer paper outlet, and a discharge port at the end of the discharge gutter 37 (all not shown) are provided on the back side. On the other hand, the front panel is provided with various lamps and operation buttons (details will be described later), as well as a liquid crystal display 73 and a keyboard 74.

The specific operation in the above configuration will be explained below. 1 is installed horizontally in the cabinet 1 using the horizontal adjustment screw 72, and the power switch is turned on.

When the power is turned on, the orange WA f r lamp 7
5 lights up. The WAIT lamp 75 lights up for several minutes to make the attached air compressor etc. ready for operation.
At the same time as the IT lamp 75 goes out, the green REΔDY lamp 76 lights up, indicating that the vehicle is ready for operation.

When ready for operation, press CLEAR button 77, INC.
Operate the setting buttons consisting of button 78 and 7 ENTER buttons to select whether the sample is brown rice or white rice (TYPE).
E), and whether or not to sort (SORT ING>
Configure settings.

Depending on the operation of the setting button, the white L provided at the top of the panel
The corresponding L F D of the ED group 80 and the red LED group 81 lights up. For example, press the ENTER button 82 and press the red L
After lighting -rYPE LED 87 of ED group 81,
Press the CL E A R button 77 to turn on the white LED group 80
Turn on the RESET LED 83, then turn on the I-NC
Press button 78 and BROWN-LED84 and W+-1
Among 1TE and LED85, BROWN and L E D
84 and press the ENTER button 82 again. Similarly, 5ORTING-LED86 and RESET
-After lighting LED88, YES-LED89 and O
If you do not wish to sort among the N.I-E D 90, press the INGNC button 78 to select No. I-E D 90, and press the E N T E R button 82 to select brown rice as a sample. Set "No sorting".

In this way, after completing the settings before operation, the supply hopper 2
Add in the brown rice. Approximately 1,
A mark is set to indicate where to put 000 grains of brown rice. Further, large foreign matter such as straw waste is removed by a rough screening screen 4 stretched in the supply hopper 2. Then, S
Press the T A RT button 91 and the LCD display 73
While looking at the screen, input sample No. 1 and the moisture content of the number using the keyboard 74. When these data are input, the READY lamp 76 goes out and the yellow RIJN lamp 92 turns on.
Piebreak 16 and motor 26 are activated.

When the RUN lamp 92 lights up, the rice setter 5 is opened and the rice grains flow out into the supply gutter 3. The rice grains in the supply gutter 3 are slowed down by the weir plate 6 and become uniform. When passing through the first selection section 7, the sample is not blown out from the air blowing slit 11, but is subjected to the wind selection effect, and small foreign substances such as rice husks mixed in the sample are blown away toward the branching path 9. It is dropped into the foreign object receiving box 8.

The rice grains that have been screened to remove small foreign matter fall onto the current plate 14 of the perturbation feeder 16 and are gradually conveyed by the vibration action. In other words, the rice grains that have been photographed are expected to pass on the rectifying plate 14 with their long axes facing the grooved belt conveyor 19 side, but all the rice grains are directed to one of the 15 strips by the rectifying brush 18. It is inserted into the groove and transported.

The conveyance speed is 18 to 20111111/SeC.

The rice grains that have reached the end of conveyance on the rectifying plate 14 are transferred directly into the grooves of one grooved belt conveyor.
Since the speed is 25 ml/SeC, which is faster than that of No. 5, the rice grains in one groove of the grooved belt conveyor are transported one grain at a time.

In the first measurement, the split grains are analyzed, so the light source 46 of the lighting device 45 for the trunk side is turned on, and the rice grains passing through the P position are illuminated from diagonally above.

When the cracked grain passes through the P position, the light is refracted on the crack surface and diffusely reflected, creating a difference in brightness and darkness across the crack surface.The linear image sensor array 51 detects this difference in light intensity and detects the crack. If it is 1.5II1m or more, it is determined that it is a split grain. That is, data obtained by linear scanning by the linear image sensor array 51 is converted into a digital signal by a general A/'D exchanger 55, and after being corrected by an image normalization device @58. In the body side comparator 64, the edge of the rice grain is detected from the difference in light intensity between the rice grain and the grooved belt conveyor 19 to confirm the identity of the rice grain, and the brightness of the signal from the endosperm part that has cut this end is determined. The encoder 65 processes the signal into a signal that can be quickly calculated by the arithmetic and control unit 61 and outputs it to the arithmetic and control unit 61 every moment. When there is a difference in brightness before and after the rice grain in the traveling direction, the rice grain is regarded as a split grain, and the sorting and removing device 53 is activated. That is, the solenoid valve 69 on the groove that conveys the rice grains is turned on for about 20 msec, and compressed air is supplied to the nozzle section 70. As a result, the suction tube 66
The surrounding area becomes low pressure, and the rice grains are sucked in from the suction port 67 and fall into the rice grain receiving box 69 via the conveyance pipe 68. Needless to say, the electromagnetic valve 69 is configured to operate after one second, which is the time required for the rice grains to reach directly below the suction pipe 66 from the P position. Further, the number of whole grains and the number of grains to be divided into shells transported by the grooved belt conveyor 19 are counted and stored by the arithmetic and control device 61.

In this way, the sample from which the split grains have been sorted and removed is conveyed from the conveyance end of one grooved belt conveyor via the communication gutter 30 and upwardly conveyed by the circulation belt conveyor 31 to the discharge gutter 37.
carried to. At this time, the switching valve 38 of the discharge gutter 37 is open, so the rice grains are circulated through the circulation path 39 into the supply gutter 3. On the other hand, the rice grains are stored at the bottom of the feed gutter 3 after the first measurement. There are rice grains that have not been mixed, and in order to distinguish between them, the contamination prevention valve 13 is closed when, for example, 10 seconds have elapsed after the start of operation. In addition, the mixing prevention valve 13
The switching valve 38 is opened and closed by an electromagnetic solenoid, a servo motor (not shown), or the like.

The time required for all the rice grains at the bottom of the supply gutter 3 to be measured;
For example, after 15 seconds have elapsed, the contamination prevention valve 13 opens and the rice grains flow down onto the current plate 14, and a second measurement is performed. The second time, all detection items other than the body side were measured, and these were combined based on the relationships in Table 1 above, and the number of grains for each analysis category and the ratio (%) to the total number of grains were calculated.
Calculate.

That is, to measure the average reflected light interval (A>), data from the linear image sensor array 51 is used for whiteness measurement A/
After being processed by the D converter 54 and the image normalizing device 56, it is averaged by the gray scale averaging device 57, and the encoder 6
0 to the arithmetic and control unit 61, and the average amount of reflected light of the entire rice grain is calculated. In addition, the signals processed by the general A/D converter 55 and the image normalization device 58 are branched and input to the general comparator 59 and the skin deviation comparator 62, thereby making it difficult to distinguish. Detection of grains that are out of alignment is processed using a unique comparator, making it possible to speed up the overall measurement. Similar to other comparators, the skin deviation comparator 62 confirms the rice grains on the grooved belt conveyor 19, and also detects rice grain data on the body side for all detection items (A to H in Table 1). It is processed by comparing it with a threshold value for use, and is input to the arithmetic and control unit 61 via the encoder 63, and it is determined whether or not there is a skin deviation grain from the detection results of all detection items.

Similarly, in the general comparator 59, analysis categories (■■■■■) other than the skin deviation grains (■) in Table 1 are processed every moment using the data from the linear image sensor array 51. The arithmetic and control unit 6 analyzes the entire rice grain and determines it into one of the analysis categories. These are processed at the same speed as the linear image sensor array 51 scans.

The rice grains that have been detected for the second time are taken out of the machine through the discharge gutter 37, and the liquid crystal display 3 and printer (not shown) display (print) the determination results. In other words, sample number, inspection date, moisture content (%), grain size (%), grains with skin deviation (%), immature grains (%), damaged grains (%)
, split grains (%), North America (%), colored grains (%), foreign matter/foreign grains (%), and the grades obtained by comparing these measurement results with rice inspection standards are recorded on a designated paper. It is printed and displayed on the liquid crystal display 73.

[Brief explanation of the drawing]

1 is a left sectional view of an embodiment of the present invention, FIG. 2 is a right sectional view, FIG. 3 is a sectional view taken along the line A-Δ in FIG. 1, FIG. 4 is a sectional view taken along the line B-B in FIG. The figure is an enlarged front view, Fig. 6 is a partially omitted perspective view of the internal mechanism, Fig. 7 is an enlarged perspective view of the sorting device, Fig. 8 is a block diagram, and Fig. 9 shows the conventional detection method. It is a graph. 1... Cabinet, 2... Supply hopper, 3...
・Supply gutter, 4... Rough selection net, 5... Shutter, 6.
... Weir plate, 7... Wind selection section, 8... Small foreign object receiving box, 9
... Branching path, 10 ... Receiving box mounting stand, 11 ... Air blower sulin 1-112 ... Air blower, 13 ... Contamination prevention valve, 14 ... Grain regulating plate, 15 ... Vibration feeder, 16
... Pie break-117... Base, 18... Brush, 19... Grooved belt conveyor, 20.21...
- Passive pulley, 22... Drive pulley, 23...
Timing belt, 24... Intermediate pulley, 25...
・Timing belt, 26...Motor, 27...
Motor pulley, 28... Intermediate shaft, two... Tachometer, 30... Connection gutter, 31... Circulating belt conveyor, 32... Passive pulley, 33... Drive pulley, 34... ...Passive pulley, 35...Motor pulley, 36...Belt, 37...Discharge gutter, 38
...Switching valve, 3...Circulation path, 40...Bulkhead, 4
1...Light source, 42...Umbrella, 43...Slit,
44... Lighting device, 45... Body side lighting device, 46
...Light source, 47...Shade, 48...Condenser lens,
4...Lens barrel, 50...Sensor box, 5
DESCRIPTION OF SYMBOLS 1... Linear image sensor array, 52... Anti-scratch roller, 53... Sorting/removal device, 54... A/D converter for whiteness measurement, 55... General A/D conversion vessel,
56... Image normalization device, 57... Gray value averaging device, 58... Image quality normalization device, 59... General use comparator, 60... Encoder, 61... Calculation control device, 62
... Comparator for skin deviation, 63 ... Encoder, 64 ...
Placement comparator, 65... encoder, 66... suction tube,
67... Suction port, 68... Conveying pipe, 69... Rice grain receiving box, 70... Nozzle part, 71... Ventilation hole, 72...
... Horizontal adjustment screw, 73 ... Liquid crystal display, 74
...Keyboard, 75...WA ] T lamp, 7
6...READY lamp, 77...CLEAR button, 78...INc button, 79...ENTINT
1st day button... white ED group, 81... red LE
D group, 82...ENTER button, 83...RE
S E T・LED, 84...BROWN-LED
, 85...WHITE-LED, 86...5ORT
ING-LED, 87...TYPE-LED, 8
8...RESET-LED, 89...YES-LE
D, 90...No-LED, 91, 5TART button, 92-...RUN lamp. Patent applicant: Satake Seisakusho Co., Ltd.

Claims (3)

[Claims] (1) Light is irradiated onto the rice grains that are sequentially transported by the transport means, and the rice grains are scanned linearly in a direction perpendicular to the transport direction using a linear image sensor. The light intensity of a point, the light intensity of the difference between the brightest point and the darkest point, the area of a region that is brighter by a certain amount or more than the average reflected light amount, the area of a region that is also darker than the average reflected light amount by a certain amount or more, the overall shadow area, and the elliptical shape. A method for determining the quality of rice grains, which is characterized in that the items are detected, and these detected values are appropriately combined to perform an analysis for each determination category that is the basis of quality determination, and the quality of the sample is determined based on the analysis results. . (2) The rice grain quality determining method according to claim (1), wherein the rice grains are conveyed by a conveyor having a plurality of grooves for arranging the rice grains. (3) Claim (1) or (3), wherein the rice grains are immediately sorted and removed based on the analysis results of a certain quality classification category;
2) Method for determining rice grain quality as described.