JP5030244B2 - Method for producing test sample in optical granular sorter - Google Patents

Description

The present invention relates to a method of manufacturing a test sample in an optical granular object sorting machine.

  A schematic configuration of a general optical granular material sorter installed in a rice milling facility will be described with reference to FIG. FIG. 3 is a schematic configuration diagram of an optical granular material sorter. A storage tank 101 that temporarily stores a material to be sorted, a vibration feeder 102 that conveys the material to be sorted while being vibrated, and the vibration feeder 102 are supplied. A chute 103 that diffuses the object to be sorted while flowing downwardly, an optical inspection unit 104 that identifies the object to be sorted falling from the lower end of the chute 103 as a non-defective product and a defective product, and the optical inspection unit 104 that identifies the product as a good product It is generally known to include an ejector unit 105 that drops the detected product as it is, while the optical inspection unit 104 identifies the defective product in a different direction from the non-defective product. And the optical granular material sorter installed in the rice milling facility has problems of defective products and foreign matter mixed in to the non-defective product side, and in order to avoid this, regular maintenance inspection work of the optical granular material sorter is performed. It must be done reliably and thorough in quality control.

  As work items for maintenance and inspection in the optical granular material sorter, in the optical inspection unit 104, the quality of the detection signals of the optical sensors 106, 106, the operation confirmation, the detection range (field of view) confirmation, the illumination means 107,. As an example, confirmation of the illuminance of the light source, adjustment of the angle of the background 108, 108, and the like can be cited. As mentioned. Such maintenance and inspection work is performed by flowing a test sample from the storage tank 101. However, when the raw colored kernel is used as the test sample, the raw colored kernel is obtained as time passes. In recent years, there is a tendency to perform maintenance and inspection work using a test sample artificially made of an acrylic resin or the like.

  Patent Document 1 relates to a spectroscopic analyzer that measures the components of grains, and describes the effects and effects of using an artificial test sample such as an acrylic resin to prevent aging and to save storage. There is. Further, Patent Document 2 relates to a food quality determination method and apparatus, and there is a description that it is possible to determine a defective product pattern even using an artificial dummy food dough. Further, Patent Document 3 relates to imitation rice for setting the quality discrimination in the rice grain quality discrimination device, and forms a rice grain shape by joining halves formed of artificial materials, and inside the body grain of rice grains There is a description of the action and effect that, by embedding a corresponding imitation crack portion, it can be used as a reference rice for a long time without using raw rice grains.

  However, in the case of a test sample formed of an artificial material, the material is missing or the test sample itself disappears, so that the test sample remains on the conveyance path including the storage tank 101, the vibration feeder 102, and the chute 103. Considering the accident that these residues are mixed into the non-defective product side, there is a problem that it is desirable to avoid making test samples with artificial materials as much as possible.

Japanese Patent Laid-Open No. 10-30984 JP 2002-195816 A JP 2004-251737 A

In view of the above problems, the present invention provides a method for producing a test sample in an optical granular material sorter that is extremely unlikely to cause human health damage even if the test sample is mixed into a non-defective product. Doing this is a technical issue.

In order to solve the above-mentioned problems, the present invention uses pebbles grains as a raw material, passes the pebbles through a sieving machine, sorts the particle size, and passes the pebbled grains sorted by the particle size through an optical granule sorter. In addition, the pebbles selected in the plurality of groups are supplied to the granular article level inspection device to characterize the pebbles, while the characterized pebbles are collected and collected. A non-defective product test sample is prepared, and the defective product test sample is further prepared by mixing with a non-defective product test sample made of pre-sized rice grains at a predetermined ratio.

According to the invention described in claim 2, 20 to 100 parts by weight of the non-defective product test sample is mixed with 1 part by weight of the defective product test sample.

  According to the present invention, the pebbles grains are used as defective product test samples, the pre-sized rice grains are used as good product test samples, and these defective product test samples and non-defective product test samples are mixed and prepared at a predetermined ratio. It is a test sample in an optical granular material sorter, and instead of using artificial materials as in the prior art as a raw material for defective product test samples, for example, a stone remover installed in a rice milling facility By using pebbles discharged from the market, even if a defective test sample may be mixed into the non-defective product side, the possibility of causing a health hazard to humans is extremely low, and a safe and safe test sample is provided. be able to.

Moreover , it is a test sample in the optical granular material sorter in which 20 to 100 parts by weight of the non-defective product test sample is mixed with 1 part by weight of the defective product test sample. For example, a defective product mixing rate of 1% to 5% Test samples arbitrarily adjusted to the range can be provided.

Further, according to the first aspect of the invention, pebbles grains as a raw material, through the small stone particles as well as the particle size screened through the sifter, pebbles grains is the particle diameter screened optical granular object sorting machine In addition, the pebbles selected in the plurality of groups are supplied to the granular article level inspection device to characterize the pebbles, and the characterized pebbles are collected. In this way, a defective test sample is prepared, and the defective test sample is mixed with a non-defective test sample made of pre-sized rice grains at a predetermined ratio to prepare a test sample. A test sample can be produced at a much lower cost than producing a sample. In addition, as a defective product test sample, for example, a group of pebbles that specifically react to a visible light camera (CCD) of an optical granular material sorter and a near infrared light camera (NIR) of an optical granular material sorter Since only the pebble particles that react specifically are collected, maintenance inspection work of the optical granular material sorter can be performed reliably.

According to the second aspect of the present invention, there is provided a test sample in an optical granular material sorter in which 20 to 100 parts by weight of the non-defective product test sample is mixed with 1 part by weight of the defective product test sample. It is possible to provide a method for producing a test sample that is arbitrarily adjusted within the range of the non-defective product mixing rate from 1% to 5%.

It is a schematic diagram of the test sample manufacturing process in an optical granular material sorter. It is a flow figure at the time of optically sorting the pebble grain k. It is a schematic block diagram of an optical granular material sorter.

  A mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram of a test sample manufacturing process in an optical granular material sorter. An embodiment for carrying out the present invention will be described with reference to FIG.

  First, the pebbles used as raw materials are collected. The harvested rice grains may contain pebbles with the same particle size as the rice grains. However, the stone remover 1 installed in the grain preparation and drying facility, the rice milling facility, etc. can change the pebbles from the pebbled rice grains. Therefore, the pebbles K discharged from the stone remover 1 can be used as a raw material. Next, the pebbles K discharged from the stone remover 1 are passed through a sieving machine 2 to roughly classify the particle size, and only the pebbles k having a desired particle size (for example, about the same size as rice grains). Take out diameter, width and thickness of less than 3 mm). The pebbles k after screening by the sieving machine 2 are composed of a visible light camera (CCD) 4a for detecting the color of rice grains and a near-infrared light camera (NIR) 4b for detecting foreign matter. And optically sort through an optical granular material sorter 3.

  FIG. 2 is a flowchart for optically sorting the pebble grains k. First, when the pebble grains k are passed through the near-infrared camera (NIR) 4b arranged in the preceding stage, a group of pebble grains (arrow S1) that flows down without being detected by the near-infrared camera (NIR) 4b. The pebbles are detected by the near-infrared camera (NIR) 4b and separated into pebbles (arrow S2) to be selected (ejected). Then, the pebble grain group (arrow S1) that has flowed down (through) and the pebble grain group (arrow S2) that has been selected (ejected) are respectively passed through the visible light camera (CCD) 4a disposed in the subsequent stage. If the pebbles (arrow S1) that flowed down with the near-infrared camera (NIR) 4b at the front stage are passed through the visible light camera (CCD) 4a at the rear stage, they are not detected by the visible light camera (CCD) 4a at the rear stage. It is separated into a group of pebbles grains (arrow S3) that flows down (through) as it is, and a group of pebbles grains (arrow S4) that is detected and ejected by the subsequent visible light camera (CCD) 4a. As a result, the pebble grains k are not detected by the visible light camera (CCD) 4a and the near-infrared light camera (NIR) 4b, but only on the pebble grain group (1) and the visible light camera (CCD) 4a. There are two types of pebbles (2) that are detected and sorted.

  On the other hand, when a group of pebbles (arrow S2) detected and ejected by the near-infrared camera (NIR) 4b at the front stage is passed through the rear-stage visible light camera (CCD) 4a, the rear-stage visible light camera (CCD) ( A group of pebbles (arrow S5) that flows down (through) without being detected by CCD) 4a, and a group of pebbles (arrow S6) that is detected and ejected by visible light camera (CCD) 4a in the subsequent stage Separated. As a result, the pebbles k are detected and selected by both the visible light camera (CCD) 4a and the near-infrared light camera (NIR) 4b, and the near-infrared light camera (NIR). Two types of pebbles (4), which are detected and selected only by 4b, are selected, and a total of four types of pebbles are selected.

  In FIG. 2, one near-infrared camera (NIR) 4b is disposed as the front optical sensor and two visible light cameras (CCD) 4a are disposed as the rear optical sensors. However, the present invention is not limited to this. Instead of this, one visible light camera (CCD) 4a may be arranged as an optical sensor in the front stage, and two near-infrared cameras (NIR) may be arranged as optical sensors in the rear stage. Even in this arrangement configuration, a total of four types of pebbles are selected as described above.

  The test sample manufacturing process will be described again with reference to FIG. As described above, the pebbles grains grouped into the four types by the optical granular material sorter 3 are supplied to the granular article level inspection device 5 to analyze the shape information and the color information. The granular article level inspection device 5 is composed of, for example, a portable notebook personal computer 5a, an image scanner 5b that is connected to the computer 5a and reads an image of granular materials, and software built in the computer 5a. Is done. As a result, the image obtained by the image scanner 5b analyzes the shape information in the computer 5a. For example, the stone (a) having a larger shape than the rice grain, the shape being smaller than the rice grain, and the weight being the same as the rice grain. It can be classified into three types: stone (b) and stone (c) whose shape is smaller than that of rice grains. In addition, the image obtained by the image scanner 5b is analyzed for color information in the computer 5a. For example, the ratio of the three color modes of RGB called the three primary colors of light and the L * a * b * color system are used. The ratio of the uniform color space can be calculated and classified into blackish stones, gray stones, stones having a color close to the color of rice grains, and the like. As an example, the pebble grain group was classified as shown in Table 1 below, and each characterization could be performed.

  Next, a test sample is prepared by collecting a desired number of stones from the group of pebbles grains classified and characterized according to Table 1 (reference numeral 6 in FIG. 1). In Table 1 above, (3) NIR and CCD stones can be compared with (4) NIR-only stones. Both have the same color information and shape information. (4) NIR The stone that can be removed only by using it as a test sample. In addition, comparing (1) stones that cannot be removed by NIR and CCD with (2) stones that can be removed only by CCD, (1) the percentage of stones that cannot be removed by NIR and CCD is very small. Since it is negligible, (2) stones that can be removed by CCD alone should be used as test samples.

  Table 2 shows how many pebbles it is appropriate to pick up when (2) stones that can be removed only by CCD and (4) stones that can be removed only by NIR are selected as test samples.

  As shown in Table 2, (2) Breakdown of stones that can be removed by CCD alone: (a) 10 stones that are larger than rice grains, (b) stones that are smaller than rice grains and have the same weight as rice grains 10 grains, and (c) 10 grains having a shape smaller than that of the rice grains were made in total 30 grains. On the other hand, (4) Breakdown of stones that can be removed by NIR alone is (a) 10 stones that are larger than rice grains, (b) 10 stones that are smaller than rice grains and have the same weight as rice grains. c) A total of 30 stones of 10 stones smaller in shape than rice grains were used.

  A total of 60 pebbles are used as defective product test samples, which are mixed with a good product test sample made of pre-sized rice grains to form a test sample for an optical granular material sorter. What is necessary is just to determine the mixing ratio of the pebbles used as a defective product test sample, and the rice grain previously sized as a non-defective product test sample, assuming a defective product mixing rate. For example, since the weight of 1000 grains of Koshihikari rice (brown rice) is about 22 grams, about 6000 grains (about 132 grams) are required for 60 pebbles to produce a test sample with a defective product contamination rate of about 1%. In order to produce a test sample with a defective product mixing rate of about 2%, about 3000 rice grains (about 66 grams) should be mixed into 60 pebbles, In order to produce a test sample with a rate of about 3%, about 2000 grains (about 44 grams) of rice grains should be mixed with 60 grains of pebbles. In order to produce a test sample having a defective product contamination rate of about 5%, about 1200 grains (about 26.4 grams) of rice grains should be mixed into 60 pebbles.

  The present invention will be further described based on examples, but the present invention is not limited thereto.

  The pebbles grain K discharged from the stone remover 1 installed in the grain preparation and drying facility, the rice milling facility, etc. is used as the raw material, and the particle size is sorted through the sieving machine 2 to the same size, width and thickness as the rice grain. The pebbles k of less than 3 mm were taken out. Then, the pebbles k were optically sorted through the optical granular material sorter 3 and evaluated by the granular article level inspection device 5, and then stones having a desired number of grains were collected to prepare a test sample. The ratio of the number of pebbles was as shown in Table 2.

  Next, the 60 pebbles in total are used as defective product test samples, which are mixed with good product test samples made of pre-sized rice grains. That is, assuming that the defective product mixing rate was about 1%, about 6000 pre-sized rice grains were mixed. And this test sample is thrown into the storage tank 101 of the optical granular material sorter shown in FIG. 3, the quality of the detection signals of the optical sensors 106 and 106, the operation confirmation, the quality of the jet performance of the ejector unit 105, and the injection timing. The quality of the blast and the length of the blast time were confirmed.

This
1. When a stone having a shape larger than the grain of rice flows, it is possible to confirm whether the ejector portion 105 has good blast capability (whether or not the stone can be blown off).
2. When stones that are smaller in shape than rice grains and have the same weight as rice grains flow, the ejection timing of the ejector unit 105 is good (timing of the drive delay time of the ejector unit 105 after the optical inspection unit 104 detects) And the length of the blast time can be confirmed.
3. When stones smaller in shape than rice grains flow, the quality of the detection signals of the optical sensors 106 and 106 can be confirmed and the operation can be confirmed.
The result was obtained.

  As described above, for example, pebbles discharged from a stone drilling machine installed in a rice milling facility are used as the raw material for the defective product test sample, so that the defective product test sample may be mixed into the non-defective product side. Even in such a case, it is possible to provide a safe and safe test sample and a method for manufacturing the sample that are extremely unlikely to cause a health hazard to humans. Further, using pebbles grains as a raw material, the pebbles grains are passed through a sieving machine to sort the particle size, and the pebbles grains sorted by particle size are optically sorted into a plurality of groups through an optical granule sorter, Further, the pebbles selected in the plurality of groups are supplied to a granular article level inspection device to characterize the pebbles, while the characterized pebbles are collected to produce a defective product test sample, The test method is a test sample production method in which a defective test sample is prepared by mixing with a good quality test sample consisting of pre-sized rice grains at a predetermined ratio, so testing is much cheaper than making test samples with artificial materials. Samples can be made. In addition, as a defective product test sample, for example, a group of pebbles that specifically react to a visible light camera (CCD) of an optical granular material sorter and a near infrared light camera (NIR) of an optical granular material sorter Since only the pebble particles that react specifically are collected, maintenance inspection work of the optical granular material sorter can be performed reliably.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a test sample and its manufacturing method when performing maintenance inspection work on an optical granular material sorter.

DESCRIPTION OF SYMBOLS 1 Stone remover 2 Sieve machine 3 Optical granular material sorter 4a Visible light camera 4b Near-infrared light camera 5 Granular article level inspection apparatus 6 Test sample adjustment process

Claims (2)

  Using the pebbles grains as a raw material, the pebbles grains are passed through a sieving machine to sort the particle size, and the pebbles grains sorted by particle size are optically sorted through an optical granule sorter into a plurality of groups, The pebbles selected in the plurality of groups are supplied to a granular article level inspection device to characterize the pebbles, while the characterized pebbles are collected to produce a defective product test sample. A method for producing a test sample in an optical granular material sorter, characterized in that a test sample is prepared by mixing at a predetermined ratio with a non-defective test sample made of previously sized rice grains. The method for producing a test sample in an optical granular material sorter according to claim 2 , wherein 20 to 100 parts by weight of the non-defective product test sample are mixed with 1 part by weight of the defective product test sample.

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