JP2006208091A - Inspection device and method for nucleus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To quickly determine a nucleus, as to an inspection device and method for the nucleus, capable of determining a pearl nucleus or the like. <P>SOLUTION: This device/method comprises a support means 3 of a nonmagnetic substance capable of imparting vibration to the nucleus 13 supported removably onto a support part 15, a magnetic susceptibility inspection means 5, capable of impressing a magnetic field to the nucleus 13 to detect a magnetic susceptibility of the nucleus 13, and a determination means 7 for determining the nucleus 13, based on the weight magnetic susceptibility calculated from the detected magnetic susceptibility of the nucleus 13 and the weight of the nucleus 13. The weight magnetic susceptibility is calculated from the detected magnetic susceptibility of the nucleus 13 and the weight of the nucleus 13 by the magnetic susceptibility inspection means 5, and the nucleus 13 is determined quickly and exactly, based on the difference in the weight magnetic susceptibilities. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a nuclear inspection apparatus and method capable of discriminating pearl nuclei and the like.

  There are various types of pearl nuclei, such as those using shellfish, those using giant clams, and those using artificial nuclei.

  Of these, oyster shellfish are prohibited from being exported from the country except for the government's permit under the Washington Convention, and pearl nuclei of oyster shellfish and pearls with pearl oyster shells as pearl nuclei are accurately identified and exported without permission. Need to be prevented. Pearls using artificial nuclei are low in value and must be accurately identified and removed to ensure the quality of the pearls.

  In this case, if the pearl nucleus itself is not formed with a pearl layer, it can be roughly distinguished by its appearance.

  However, there is a difficulty in discrimination accuracy in visual discrimination of appearance. Further, there are a large number of pearls to be discriminated, and a large number of inspectors are required for visual discrimination of the appearance. In view of the number and discrimination accuracy, it is impossible to discriminate in reality.

  Furthermore, it is almost impossible to determine the material of the pearl nucleus after the pearl layer is formed.

  In order to solve such a problem, there is a nuclear inspection apparatus that discriminates the material of the pearl nucleus by irradiating the pearl with light. In this apparatus, a light emitting unit and a light receiving unit are arranged to face each other, and light from the light emitting unit that has passed through the nucleus is received by the light receiving unit, thereby obtaining a light transmittance distribution and generating an optical CT image.

  However, with such an apparatus, it was not possible to quickly identify the pearl nucleus.

Japanese Patent Laid-Open No. 10-260136

  The problem to be solved is that the nucleus cannot be quickly determined.

  In order to quickly identify the nucleus, the present invention provides a nonmagnetic support means capable of imparting vibration to the nucleus removably supported by the support portion, and a magnetic field is applied to the nucleus to determine the magnetic susceptibility of the nucleus. The main feature is that it comprises detectable magnetic susceptibility inspection means and discrimination means for discriminating the nucleus based on the weight magnetic susceptibility calculated from the detected magnetic susceptibility and weight of the nucleus.

  The nuclear inspection apparatus of the present invention comprises a nonmagnetic support means capable of imparting vibration to a nucleus removably supported by a support portion, and a magnetization capable of detecting the magnetic susceptibility of the nucleus by applying a magnetic field to the nucleus. And a discriminating means for discriminating the nucleus based on the weight magnetic susceptibility calculated from the detected magnetic susceptibility and the weight of the nucleus. Can be determined.

  When the support means rotatably supports the nucleus and the rotation position of the magnetic field applied to the nucleus can be changed by the rotation, it is possible to obtain the weight magnetic susceptibility of the nucleus at a plurality of locations, and more accurately the nucleus. Can be determined.

  When the support means rotates the nucleus within a range of 180 degrees, the nucleus can be discriminated more accurately.

  The nucleus inspection method of the present invention is characterized in that a nucleus is discriminated by comparing the magnetic susceptibility obtained from the magnetic susceptibility and weight of the nucleus.

  Therefore, the nuclei can be roughly classified according to the difference in weight magnetic susceptibility.

  When a primary process for primary determination based on a difference in weight magnetic susceptibility and a secondary process for secondary determination based on a comparison of specific gravities for the nuclei extracted in the primary process are provided, due to a difference in weight magnetic susceptibility in the primary process. Nuclei can be broadly classified quickly, and only the nuclei extracted by such broad classification can be discriminated by the difference in specific gravity in the secondary process, and nuclei can be discriminated quickly and accurately.

  A secondary step of secondarily discriminating between a nucleus having anisotropy and a core having no anisotropy in the material by detecting anisotropy in the biaxial direction of the nucleus extracted in the primary step; In this case, the nucleus can be discriminated in more detail in the secondary process, and the nucleus can be discriminated more accurately.

  When detecting the anisotropy of the secondary process using rotation by buoyancy in the liquid of the nucleus, or the magnetic susceptibility of the nucleus, or the light transmittance of the nucleus, or the light reflectance of the nucleus It is possible to reliably and quickly detect the anisotropy of the two crossing axes of the nucleus and discriminate the nucleus.

  The purpose of quickly discriminating nuclei was realized by discrimination based on gravitational susceptibility.

  1 to 3 relate to a first embodiment of the present invention, FIG. 1 is a perspective view of a nuclear inspection device, FIG. 2 is a schematic overall view, FIG. 3 is an enlarged schematic view of the main part, and FIG. It is a front view which shows the nucleus at the time of applying a magnetic field, (a) is a case where a magnetic field is applied in the direction along a stripe pattern, (b) is a case where a magnetic field is applied in the direction which crosses a stripe pattern. is there.

  As shown in FIGS. 1 and 2, the nuclear inspection apparatus 1 includes a support unit 3, a magnetic susceptibility inspection unit 5, and a controller 7 as a determination unit.

  The support means 3 is provided on the machine base 9 via a frame 11. The support means 3 removably supports the spherical pearl nucleus 13 on the support portion 15 and is rotatable while vibrating the pearl nucleus 13 supported on the support portion 15. The support portion 15 is a nonmagnetic material, and is formed of, for example, a resin hollow flexible pipe. The pearl nucleus 13 is detachably supported at the tip of the support portion 15 by air suction force or the like.

  The pearl nucleus 13 is vibrated by the vibration generator 17 of the support means 3. The vibration generator 17 is mounted on the frame 11 and the end of the support portion 15 is coupled thereto. The vibration generator 17 is connected to the controller 7 and driven and controlled by the controller 7.

  The pearl nucleus 13 is rotated by the motor 19 of the support means 3. The motor 19 is disposed on the vibration generator 17 and rotates the vibration generator 17. By this rotation, the pearl nucleus 13 can be rotated via the support portion 15. The rotation by the motor 19 is controlled by the controller 7 and is performed in a range of 180 degrees. However, the rotation angle can be arbitrarily set according to the relationship between the discrimination accuracy and the discrimination speed, for example, 90 degrees. It is also possible to configure so that the pearl nucleus 13 is not rotated. In this case, the motor 19 can be omitted.

  The magnetic susceptibility inspection means 5 includes a small magnet coil 21, a detection coil 23, a comparison coil 25, and a magnetic pole 27 as comparative samples.

  The small magnet coil 21 is attached to the end side of the support portion 15 in the housing 29. The detection coil 23 is disposed around the pearl nucleus 13 at the tip of the support portion 15. The comparison coil 25 is disposed around the small magnet coil 21. Output signals from the detection coil 23 and the comparison coil 25 are input to the controller 7. The magnetic poles 27 are attached to the frame 11 and arranged to face each other. Control of the magnetic pole 27 is performed by the controller 7.

  Next, the operation of the nuclear inspection apparatus of this embodiment will be described together with the nuclear inspection method.

  In the present embodiment, primary discrimination is performed based on the magnetic susceptibility and weight magnetic susceptibility obtained from the magnetic susceptibility and weight of the pearl nucleus 13 in the primary process, and the pearl nucleus 13 extracted by primary discrimination in the secondary process is subjected to secondary discrimination by comparing the specific gravity. To do.

  The primary process is performed using the nuclear inspection apparatus 1. That is, as shown in FIGS. 2 and 3, a magnetic field is applied in the direction of arrow A to the pearl nucleus 13 between the magnetic poles 27 while the pearl nucleus 13 at the tip of the support portion 15 is vibrated by the vibration generator 17. At this time, the magnetic susceptibility of the pearl nucleus 13 can be measured by signals from the detection coil 23 and the comparison coil 25. The measurement of the magnetic susceptibility is performed while rotating the pearl nucleus 13 within a range of 180 degrees by changing the position of the magnetic field applied to the pearl nucleus 13 as shown in FIG. The measured magnetic susceptibility is divided by the weight of the pearl nucleus 13 to be measured for magnetic susceptibility by the controller 7 and converted to a weight magnetic susceptibility. The weight of the pearl nucleus 13 is, for example, measured in advance and input to the controller 7, or when supported by the support unit 15 as shown in FIG.

  Further, in this embodiment, the measurement of the weight magnetic susceptibility is performed on two intersecting axes of the axis along the stripe pattern 30 of the pearl nucleus 13 and the axis intersecting the stripe pattern 30, thereby obtaining a measurement value as shown in FIG. I was able to get it.

  FIG. 5 shows a change in weight magnetic susceptibility on two intersecting axes of nuclei using shellfish or giant clam. The vertical axis in FIG. 5 indicates the weight magnetic susceptibility, and the horizontal axis indicates the rotation angle of the pearl nucleus 13 by the motor 19.

  In FIG. 5, a line segment 31 shows a change when a magnetic field is applied along the stripe pattern 30 to the pearl nucleus using the shellfish. A line segment 33 shows a change when a magnetic field is applied to the pearl nucleus using the shellfish so as to cross the streak pattern 30. A line segment 35 shows a change when a magnetic field is applied to the pearl nucleus using the clam shell so as to follow the streaks 30. A line segment 37 shows a change when a magnetic field is applied to the pearl nucleus using a clam shell so as to cross the streak pattern 30.

  In FIG. 5, snail line segments 31 and 33 are in the range between about −5.00E-08 to −1.50E-07, and clam line segments 35 and 37 are about −3.50E-07. It is in the range of -4.00E-07. Therefore, it is possible to quickly and accurately determine the nucleus using the clam shell based on whether or not the line segment indicating the change in weight magnetic susceptibility is in the range of about −3.50E-07 to −4.00E-07. it can.

  Fig. 6 shows the average weight magnetization obtained by measuring the change in weight magnetic susceptibility multiple times at the crossed two axes of the nucleus using clam shellfish, white butterfly shell, shellfish shellfish, or spotted shellfish, and averaging the measurement results. It is a graph which shows distribution of a rate. In each figure, the vertical axis represents the distribution ratio of the average weight magnetic susceptibility, and the horizontal axis represents the distribution area of the average weight magnetic susceptibility. FIG. 6A shows a case where a clam shell is used as a nucleus, FIG. 6B shows a case where a white butterfly shell is used as a nucleus, FIG. 6C shows a case where a shellfish is used as a nucleus, and FIG. It is a graph at the time of using a so-called spotted shellfish as a nucleus.

  As is apparent from FIG. 6, in this embodiment, the average weight magnetic susceptibility of the clam shellfish and the white butterfly shell is distributed in a range of about −3.50E-07 to −4.00E-07. The average weight magnetic susceptibility of mussel is about -2.50E-07-2.25E-07, and the average weight susceptibility of mussel-filled snail is about -3.00E-07-0.75E-07. Is distributed. Accordingly, when the average weight magnetic susceptibility is in the range of −3.00E-07 to 2.25E-07, it can be determined as a shellfish or a shellfish containing a spot, and approximately −3.50E-07 to −4. If it is within the range of .00E-07, it can be determined to be a clam shell or a white butterfly shell. Therefore, in the primary process, the pearl nuclei 13 can be classified roughly at high speed by primary discrimination in which the weight magnetic susceptibility is compared by the inspection apparatus 1. In addition, a nacreous layer is formed in the nacreous nucleus 13 by measuring the weight magnetic susceptibility with a vibrating sample magnetometer, an AC magnetometer, a magnetic balance, a nuclear magnetic resonance apparatus (NMR / MRI), and an electron spin resonance apparatus (ESR). Even if it is, high-speed categorization becomes possible.

  The pearl nucleus 13 that has been primarily discriminated in this way is appropriately extracted and a secondary process is performed. In this embodiment, shellfish and white butterfly are extracted.

  FIG. 7 is a graph showing the distribution of weight magnetic susceptibility of nuclei using clam shellfish or white butterfly shells. The vertical axis of FIG. 7 indicates the distribution ratio of the weight magnetic susceptibility, and the horizontal axis indicates the distribution area of the weight magnetic susceptibility. FIG. 7A shows a case where a clam shell is used as a nucleus, and FIG. 7B shows a case where a white clam shell is used as a nucleus.

  As can be seen from FIG. 7, the distribution of the weight magnetic susceptibility of nuclei using clam shellfish and white butterfly shells is close to each other. Determine next.

  The specific gravity of the pearl nucleus 13 is calculated by, for example, the weight of the pearl nucleus 13 and the weight measured by the weight measuring device 39 shown in FIG. The measured weight in FIG. 8 is the weight of the pearl nucleus 13 in the pure water 41.

  The weight measuring device 39 suspends the pearl nucleus 13 from a suspended pillar 45 erected on a weighing pan 43 with pure water 41, and sinks the pearl nucleus 13 in the pure water 41 in a container 49 supported by a column 47. It is.

  The result shown in FIG. 9 was obtained by calculating the specific gravity by dividing the weight of the pearl nucleus 13 by the value measured by the weight measuring device 38.

  FIG. 9 is a graph showing the specific gravity distribution of nuclei using giant clams or white butterflies. The vertical axis in FIG. 9 indicates the distribution ratio of the specific gravity of the nucleus, and the horizontal axis indicates the specific gravity of the nucleus. FIG. 9A shows the case of a nucleus using a clam shell, and FIG. 9B shows the case of a nucleus using a white butterfly shell.

  As is clear from FIG. 9, the specific gravity of the clam shell is distributed in the range of about 2.85 to 2.91, and the specific gravity of the white butterfly is distributed in the range of about 2.73 to 2.81. Therefore, when the specific gravity of the pearl nucleus 13 is in the range of about 2.85 to 2.91, it can be determined as a clam shell, and the specific gravity of the pearl nucleus 13 is in the range of about 2.73 to 2.81. If there is, it can be judged as a clam shellfish. For this reason, in the secondary process, the clam shellfish and the white butterfly shell extracted by the high-speed classification in the primary process can be quickly and accurately discriminated.

  As described above, in this embodiment, the pearl nuclei 13 can be roughly classified according to the difference in weight magnetic susceptibility calculated from the measured magnetic susceptibility and weight, and the pearl nucleus 13 can be discriminated quickly and accurately. Since the measurement of the weight magnetic susceptibility can be performed at a high speed, an apparatus capable of performing a large number of inspections of several tens of thousands per hour can be realized.

  The calculation of the weight magnetic susceptibility is performed while rotating the pearl nucleus 13 by the support means 3 and changing the position of application of the magnetic field to the pearl nucleus 13, so that the weight susceptibility at a plurality of positions can be calculated more accurately. The pearl nucleus 13 can be discriminated.

  Moreover, since the rotation of the pearl nucleus 13 is performed in a range of 180 degrees, a magnetic field can be applied over the entire pearl nucleus 13, and the pearl nucleus 13 can be discriminated more accurately.

  In the present embodiment, the pearl nuclei 13 are roughly classified by primary discrimination based on the difference in weight magnetic susceptibility in the primary process, and the pearl nuclei 13 extracted by the major classification in the secondary process are secondarily distinguished based on the difference in specific gravity. In the next process, it is only necessary to discriminate the pearl nucleus 13 extracted by the main classification in the primary process, and the discrimination of the pearl nucleus 13 can be performed quickly and accurately.

  In addition, since the secondary process is performed by comparing the specific gravity, the weight of the pearl nucleus 13 used in the primary process can be used, and the identification of the pearl nucleus 13 can be performed more quickly and accurately. .

  In the said Example, although the primary process and the secondary process were performed, it is also possible to perform only a primary process.

  Further, the pearl nucleus 13 is discriminated based on the weight magnetic susceptibility of the pearl nucleus 13 in the two intersecting axes, but the pearl nucleus 13 can also be discriminated based on the uniaxial weight magnetic susceptibility.

  FIGS. 10 and 11 relate to Embodiment 2 of the present invention, FIG. 10 is a schematic plan view of a nuclear inspection apparatus used in the secondary process, and FIG. 11 is a schematic side view of the main part.

  In the present embodiment, in the secondary process, by detecting the anisotropy in the intersecting biaxial axis, the material is anisotropically discriminated from the nucleus having no anisotropy.

  As shown in FIGS. 10 and 11, the nuclear inspection apparatus 1 </ b> A constitutes a test liquid tank 51, lamps 53 and 54 constituting a light emitting unit, CCD cameras 55 and 56 constituting a light receiving unit, and a determination unit. It consists of a controller 7A.

  The test liquid tank 51 is formed of, for example, a transparent material that transmits light, and includes a supply unit 57, a flow channel unit 59, a first sorting channel unit 61, and a second sorting channel unit 63.

  The supply unit 57 receives a large number of pearl nuclei 13 as spherical nuclei and supplies the pearl nuclei 13 to the flow channel unit 59 one by one.

  The flow path part 59 continuously flows the pearl nucleus 13 one by one.

  The first and second sorting path portions 61 and 63 are branched from the downstream end of the flow path portion 59. A sorting door 65 is provided between the first and second sorting path portions 61 and 63. The sorting door 65 is rotationally controlled so as to switch between the first sorting path portion 61 closed state and the second sorting path portion 63 closed state by driving the motor 67. The driving of the motor 67 is controlled by the controller 7A.

  The lamp 53 is disposed on the lower surface side of the flow path portion 59 of the test liquid tank 51. The lamp 53 emits light from below to above the flow path portion 59. The lamp 54 is disposed on the side of the flow path 59 of the test liquid tank 51. The lamp 54 emits light from one side of the flow path portion 59 to the other side. Therefore, the lamps 53 and 54 emit light in the vertical and horizontal directions with respect to the test liquid tank 51.

  The CCD camera 55 is disposed on the upper side of the flow path portion 59 so as to face the lamp 53. The CCD camera 55 can receive light from the lamp 53 through the pearl nucleus 13. The signal from the CCD camera 55 is input to the controller 7A. The CCD camera 56 is disposed opposite to the lamp 54 on the other side in the horizontal direction of the flow path portion 59. The CCD camera 56 can receive light from the lamp 54 through the pearl nucleus 13. The signal from the CCD camera 56 is input to the controller 7A.

  In the test solution tank 51, for example, tetrabromoethane is accommodated as a liquid 69 having a specific gravity larger than that of the pearl nucleus 13 and having a low toxicity. The liquid 69 flows from the supply unit 57 to the first and second sorting path units 61 and 63 and circulates. Accordingly, the pearl nucleus 13 floats in the test liquid tank 51 as shown in FIG. 11 and flows from the supply unit 57 side to the first sorting path unit 61 or the second sorting path unit 63 side through the channel unit 59.

  Corresponding to the CCD cameras 55 and 56, the flow path portion 59 is provided with a first passage sensor light emitting portion 71 and a first passage sensor light receiving portion 73 that constitute a passage sensor. The first passage sensor light emitting unit 71 and the first passage sensor light receiving unit 73 are connected to the controller 7A.

  Accordingly, the light emission of the first passage sensor light-emitting unit 71 under the control of the controller 7A is received by the first passage sensor light-receiving unit 73, and a light reception signal is input to the controller 7A. When the pearl nucleus 13 passes between the first passage sensor light-emitting portion 71 and the first passage sensor light-receiving portion 73, the amount of light received by the first passage sensor light-receiving portion 73 disappears or decreases. Is detected to have passed between the first passage sensor light emitting portion 71 and the first passage sensor light receiving portion 73.

  On the downstream end side of the flow path portion 59, a second passage sensor light emitting portion 75 and a second passage sensor light receiving portion 77 constituting a passage sensor are provided. The second passage sensor light emitting unit 75 and the second passage sensor light receiving unit 77 are connected to the controller 7A.

  Accordingly, the light emitted from the second passage sensor light-emitting unit 75 under the control of the controller 7A is received by the second passage sensor light-receiving unit 77, and the received light signal is input to the controller 7A. When the pearl nucleus 13 passes between the second passage sensor light emitting portion 75 and the second passage sensor light receiving portion 77, the controller 7A performs the same as in the case of the first passage sensor light emitting portion 71 and the first passage sensor light receiving portion 73. Then, the passage of the pearl nucleus 13 is detected.

  In this apparatus 1 </ b> A, a large number of pearl nuclei 13 extracted in the primary process are supplied from the supply unit 57 side and flow from the supply unit 57 to the flow channel unit 59 at a constant speed together with the liquid 69 flowing through the test liquid tank 51. In the flow path part 59, first, the pearl nucleus 13 passes between the first passage sensor light-emitting part 71 and the first passage sensor light-receiving part 73, whereby the light reception by the passage sensor light-receiving part 29 is blocked, and the signal is sent to the controller 7A. Is sent and the passage of the pearl nucleus 13 is detected. When passage detection is performed by the first passage sensor light emitting unit 71 and the first passage sensor light receiving unit 73, the controller 7A also counts up simultaneously.

  The pearl nucleus 13 is positioned between the passage sensor light emitting portion 71 and the passage sensor light receiving portion 73 according to the positional relationship between the first passage sensor light emitting portion 71 and the first passage sensor light receiving portion 73 and the CCD camera 55 and the flow velocity of the liquid 69. Then, the controller 7A sends an operation signal to the lamps 53 and 54 and the CCD cameras 55 and 56. In response to this operation signal, the lamps 53 and 54 emit light, and the CCD cameras 55 and 56 take an image of the pearl nucleus 13 from directly below and from the side.

  The imaging signals of the CCD cameras 55 and 56 are input to the controller 7A, and it is determined whether or not there is material anisotropy of the nucleus of the pearl nucleus 13 as will be described later.

  Next, the passage of the pearl nucleus 13 is detected by the second passage sensor light emitting portion 75 and the second passage sensor light receiving portion 77 on the downstream side of the flow path portion 59. When passage detection is performed by the second passage sensor light emitting unit 75 and the second passage sensor light receiving unit 77, the controller 7A also counts up simultaneously.

  In the controller 7A, the second pass sensor light emitting unit 75 and the second pass sensor light receiving unit 77 count up at the time of passage detection, and the first pass sensor light emitting unit 71 and the first pass sensor light receiving unit 73 at the time of pass detection. The motor 23 is driven and controlled in accordance with the discrimination information.

  When it is determined that the pearl nucleus 13 has anisotropy, the sorting door 21 rotates so as to close the second sorting path portion 63 side, and the pearl nucleus 13 flows toward the first sorting path portion 61 side. When it is determined that the pearl nucleus 13 has no anisotropy, the sorting door 65 rotates so as to close the first sorting path portion 61 side and flows toward the second sorting path portion 63 side.

  In the first and second sorting passages 61 and 63, the core 13 is taken out by a scooping machine or the like. The liquid 69 circulates as it is.

  In this way, the material of the core of the pearl nucleus 13 can be selected and taken out in large quantities accurately and continuously.

  As described above, the secondary process of the nuclear inspection method by the nuclear inspection apparatus 1A detects the anisotropy of the spherical core in the intersecting biaxial direction, and the anisotropic core of the material is detected. This discriminates a nucleus having no anisotropy. Specifically, an anisotropic shellfish or white butterfly shell is distinguished from a shellfish shell having no anisotropy. In this embodiment, white butterfly shells and clam shells are extracted in the primary process, but the case of discrimination between shellfish and clam shells will be described as an example. In this embodiment, the anisotropy is detected using the light transmittance of the nucleus.

  FIGS. 12A and 12B show a light transmission state in two intersecting axes of a nucleus using a shellfish, FIG. 12A is a light transmission state diagram in one axis direction, and FIG. 12B is a light transmission state diagram in another axis direction. . That is, (a) shows the case where light is applied to the X-axis direction as one axis direction, and (b) shows the case where light is applied to the Y-axis direction orthogonal to the other axis direction.

  As shown in FIG. 12, when the light is transmitted in the X-axis direction, the nucleus looks bright, and when the light is transmitted in the Y-axis direction, it looks dark as shown in (b).

  On the other hand, FIG. 13 shows a light transmission state of a nucleus using a clam shell, (a) is a light transmission state diagram in one axis direction, and (b) is a light transmission state diagram in another axis direction. That is, (a) shows a case where light is applied in the X-axis direction, and (b) shows a case where light is applied in the Y-axis direction.

  As shown in FIG. 13, the pearl nuclei 13 of the clam shell showed almost no difference in light transmittance when light was applied in either the X-axis direction or the Y-axis direction.

  Therefore, by comparing the change in the light transmittance of FIGS. 12 (a) and 12 (b) with that of FIGS. 13 (a) and 13 (b), it is possible to use the clam shell to see if it is a nacre using a shellfish. It can be determined whether it is a pearl nucleus. Other artificial nuclei have no anisotropy and can be similarly identified.

  Similarly, it is also possible to determine whether the pearl nucleus is a pearl nucleus using a white butterfly or a pearl nucleus using a clam shell.

  14A is a schematic cross-sectional view of a pearl nucleus using a shellfish, FIG. 14B is an enlarged cross-sectional view of the main part, and FIG. 14C is a schematic view showing a cross plate structure.

  As shown in FIG. 14, the shellfish has an intersecting plate structure and has anisotropy in the intersecting two axes XY. Accordingly, the light transmittance is high in the X-axis direction, which is a direction parallel to the stripe pattern, and the light transmittance is reduced in the Y-axis direction orthogonal to the stripe pattern.

  Then, as described above, when the pearl nucleus 13 is floated on the liquid 69, the pearl nucleus 13 using the pearl nucleus of the shellfish floats so that the stripes are in the horizontal direction (X-axis direction). When images are taken by the CCD cameras 55 and 56 when light is applied, two types of images having different light transmittances can be obtained as shown in FIGS. The image in FIG. 12A is captured by the CCD camera 56, and the image in FIG. 12B is captured by the CCD camera 55.

  The controller 7A uses the imaging signals from the CCD cameras 55 and 56 to compare the image signals as shown in FIGS. 12 (a) and 12 (b), and the nacreous shell of the shellfish, as shown in FIGS. 13 (a) and 13 (b). By comparing the video signals as described above, it is determined that the pearl nucleus is other than that, such as a clam shell, and the pearl nucleus 13 can be continuously sorted as described above.

  In addition, when the shellfish and the shellfish containing a spot are extracted in the said primary process, it floats so that a stripe pattern may become a perpendicular direction (Y-axis direction). Accordingly, the image captured by the CCD camera 55 is shown in FIG. 12A, and the image captured by the CCD camera 56 is shown in FIG. 12B. Accordingly, it is possible to discriminate similarly in the case of a shellfish containing a stain.

  In the present embodiment, since the direction of the pearl nucleus 13 is determined in the test liquid tank 51 and only two directions are measured, early detection can be performed.

  That is, the pearl nucleus 13 extracted by classifying the pearl nucleus 13 according to the difference in weight magnetic susceptibility in the primary process is detected, and the anisotropy of the material in the secondary process is detected by detecting the anisotropy in the intersecting biaxial direction. And non-anisotropy nuclei can be secondarily discriminated. Therefore, only the pearl nuclei 13 extracted by high-speed classification in the primary process can be discriminated in more detail in the secondary process, and the nuclei can be discriminated quickly and accurately.

  In addition, when liquid is stored in the test liquid tank in a stationary state and pearl nuclei and the like are levitated from the bottom side of the test liquid layer, in the case of anisotropic pearl nuclei, a rotational moment is generated due to buoyancy and the surface Rotate while. By imaging this rotation with a CCD camera, it is possible to discriminate between anisotropic and non-anisotropic.

  The lamps 53 and 54 and the CCD cameras 55 and 56 may be of any form that can receive emitted light, and the CCD cameras 55 and 56 can be replaced with photodetectors. The lamps 53 and 54 and the CCD cameras 55 and 56 can be replaced with a combination of a light emitting element and a light receiving element.

  In the above-described embodiment, the nacreous shell of the shellfish and the nacreous shell of the giant clam shell, etc. are discriminated, but the present invention can also be applied to the material inspection of anisotropic nuclei other than the pearl nucleus. In this case, if the anisotropic spherical core has a property that the streaks or the like are regularly lifted only in one of the X-axis direction and the Y-axis direction, the lamp 53, which is the issuing unit and the light-receiving unit, 54 and CCD cameras 55 and 56 may be provided in at least one of the vertical and horizontal directions with respect to the test solution tank 51.

  The determination is made by comparing the video signals, but it can also be determined by directly measuring the light transmittance or reflectance.

  FIG. 15 is a graph showing a measurement result of light transmittance according to the wavelength of transmitted light of a pearl nucleus using a shellfish or a shellfish containing a shellfish and a pearl nucleus using a giant clam shellfish. The transmittance was measured by irradiating the sample with visible light / infrared light from ultraviolet light, and measuring the wavelength dependence of the transmittance from the ratio of the transmitted light and the reference light.

  In FIG. 15, a line segment 79 shows a change when light is applied to the pearl nucleus using the shellfish from the Y-axis direction of FIG. A line segment 80 shows a change when light is applied to the pearl nucleus using the shellfish from the X-axis direction (vertical as viewed from the streak pattern) of FIG. A line segment 81 shows a change when light is applied to the nucleus using the giant clam shell from the same Y-axis direction (sideways for convenience). A line segment 82 shows a change when light is applied to the pearl nucleus using the clam shell from the X-axis direction (vertical for convenience). A line segment 83 shows a change when light is applied to the pearl nuclei containing a spotted mussel from the Y-axis direction (horizontal when viewed from the stripe pattern). A line segment 84 shows a change when light is applied to the pearl nuclei with spots from the same X-axis direction (vertical as viewed from the stripe pattern).

  In FIG. 15, the transmittance anisotropy is compared with the wavelength characteristics of the transmittance, for example, the longitudinal and horizontal transmittances of the mussel line segments 80 and 79 at 600 nm and 700 nm are compared with the line segment 82 and 81 of the giant clam shell. From the comparison of the vertical and horizontal transmittances in the case, it is possible to determine that the difference is larger as a pearl nucleus using shellfish.

  Therefore, it can also be determined whether it is a pearl nucleus using a white butterfly shell or a pearl nucleus using a clam shellfish.

  It is possible to discriminate pearl nuclei with stains by a similar method.

  In this case as well, early detection can be performed by determining the direction of the pearl nucleus 13 in the test liquid tank 51 and measuring only two directions as described above.

  It should be noted that, in the mode of discriminating by the transmittance, pearls in which a relatively transparent nacreous layer such as a white mussel is thinly formed in the nacreous can be discriminated in the same manner as the nacreous nucleus, but the nacreous layer is formed thickly. In other words, it is not possible to distinguish pearls of opaque nacre such as black butterfly shells.

  FIG. 16 is a graph showing the measurement results of the light reflectance according to the wavelength of the pearl nucleus using a shellfish or a shellfish containing a shellfish and the pearl nucleus using a giant clam shellfish. The reflectance was measured by irradiating the sample with visible light / infrared light from ultraviolet light and measuring the wavelength dependence of the reflectance from the ratio of the reflected light to the reference light.

  In FIG. 16, a line segment 85 shows a change when light is applied to the pearl nucleus using the shellfish from the Y-axis direction of FIG. A line segment 86 shows a change when light is applied to the pearl nucleus using the shellfish from the X-axis direction of FIG. 14 (vertical as viewed from the streak pattern). A line segment 87 shows a change when light is applied to the pearl nucleus using a clam shell from the Y-axis direction (sideways for convenience). A line segment 88 shows a change when light is applied to the pearl nucleus using a clam shell from the X-axis direction (vertical for convenience). A line segment 89 shows a change in the case where light is applied to the pearl nuclei containing a spotted mussel from the same Y-axis direction (lateral as viewed from the stripe pattern). A line segment 90 shows a change when light is applied to the pearl nuclei with spots from the same X-axis direction (vertical as viewed from the stripe pattern).

  In FIG. 16, the reflectance in the shorter wavelength region than the wavelength characteristic of the reflectance, for example, the comparison of the longitudinal and lateral reflectances of the snail line segments 86 and 85 at 300 nm and 400 nm, and the line segment 88 of the clam shell, From the comparison of the vertical and horizontal reflectivities at 87, it is possible to determine that the difference is larger as a pearl nucleus using shellfish.

  Therefore, it can also be determined whether it is a pearl nucleus using a white butterfly shell or a pearl nucleus using a clam shellfish.

  Thus, only the pearl nuclei 13 extracted by high-speed classification in the primary process can be discriminated in more detail in the secondary process, and the nuclei can be discriminated quickly and accurately.

  It is possible to discriminate pearl nuclei with stains by a similar method.

  In this case as well, early detection can be performed by determining the direction of the pearl nucleus 13 in the test liquid tank 51 and measuring only two directions as described above.

  Moreover, in the aspect discriminate | determined by a reflectance, although a pearl cannot be discriminate | determined, it is effective for the discrimination of the perforated pearl with which the hole for letting a string pass to a pearl was made. In this case, the reflected light is received by applying light to the pearl hole.

  FIG. 17: has shown the schematic plan view of the nuclear inspection apparatus 1B which concerns on Example 3 of this invention. Note that components corresponding to those in the second embodiment will be described with the same reference numerals or B added to the same reference numerals.

  In the present embodiment, as in the second embodiment, in the secondary process, anisotropy nuclei and non-anisotropy nuclei are secondarily detected by detecting the anisotropy in the intersecting two axes. It is to be determined. In this embodiment, the case of shellfish and clam shell will be described as an example.

  The nuclear inspection apparatus 1B of the present embodiment includes an inspection passage 95, first and second inspection units 91 and 93, and a controller 7B as a determination unit.

  The inspection passage 95 includes a supply portion 57B, a flow passage portion 59B, and first and second sorting passage portions 61B and 63B.

  In the inspection passage 95, the pearl nucleus 13 is not caused to flow by the liquid, but the pearl nucleus 13 is rolled along the flow path portion 59B.

  A sorting door 65 driven by a motor 67 is provided at the downstream end of the flow path portion 59B as in the second embodiment.

  The first and second inspection parts 91 and 93 are arranged at a certain interval along the flow path part 59 </ b> B, and detect light transmittances of light having different wavelengths that pass through the pearl nucleus 13.

  Specifically, the first and second inspection units 91 and 93 include lamps 97 and 99, light receiving units 101 and 103, and interference filters 105 and 107. When the lamps 97 and 99 are driven by the control of the controller 7B, the light passes through the pearl nucleus 13 and reaches the interference filters 105 and 107. In the interference filters 105 and 107, only light of a specific wavelength is passed and received by the light receiving units 101 and 103. Signals from the light receiving units 101 and 103 are input to the controller 7B.

  For example, the interference filter 105 transmits only light having a wavelength of λ = 600 nm, and the interference filter 107 is set to transmit only light having a wavelength of λ = 700 nm.

  In the controller 7B, the material of the pearl nucleus 13 is determined by comparing the light transmittance of a specific wavelength received by the light receiving units 101 and 103.

  The operation timing of the first and second inspection units 91 and 93 is performed according to the passage detection timing by the first passage sensor light emitting unit 71 and the first passage sensor light receiving unit 73, and the selection door 65 is driven in the embodiment. 2 is performed according to the timing of passage detection by the second passage sensor light emitting unit 75 and the second passage sensor light receiving unit 77 in the same manner. In addition, the 1st passage sensor light emission part 71 and the 1st passage sensor light-receiving part 73 can also be set as the structure provided corresponding to each of the 1st, 2nd test | inspection parts 91 and 93. FIG.

  Further, as shown in FIG. 15, the slope of the transmittance change is different between the shells of the shellfish, the shells of the shellfish containing the spots, and the shells of the shellfish.

  Therefore, in the first and second inspection units 91 and 93 as described above, when the pearl nucleus 13 passes through the first and second inspection units 91 and 93, respectively, the lamps 97 and 99 are irradiated with light, respectively. By receiving light of a specific wavelength at 101 and 103, it is possible to continuously determine whether the controller 7B is the pearl nucleus 13 using the shellfish or the pearl nucleus 13 using the clam shellfish. .

  Therefore, it is possible to continuously determine whether the nucleus is a pearl nucleus using a white butterfly shell or a pearl nucleus using a clam shellfish.

  For this reason, as in the second embodiment, only the pearl nuclei 13 extracted by high-speed classification in the primary process can be determined in more detail in the secondary process, and the nuclei can be determined quickly and accurately.

  In addition, in this determination, the pearl nucleus 13 may be simply rolled and moved on the flow path portion 59B without flowing using liquid as in the first embodiment. It can be done more quickly.

  As in the first embodiment, the flow is selectively caused to flow through the first and second sorting flow path portions 61B and 63B based on the determination result.

  The first inspection is performed by using a semiconductor laser without using the interference filters 105 and 107 and applying a laser beam having a specific wavelength to the pearl nucleus 13 or incorporating a diffraction grating spectrometer in the first inspection unit 91. It is also possible to configure only the part 91.

  FIG. 18 shows a modification of the present embodiment. In this embodiment, the laser beam output from the laser output unit 109 is reflected by the pearl nucleus 13 and received by the light receiving unit 111.

  Further, as shown in FIG. 16, the slope of the reflectance change is different between the shellfish, the pearl nuclei of spotted shellfish, and the pearl nuclei of clam shellfish.

  Therefore, by comparing the light reflectance of specific wavelengths (for example, 300 nm and 400 nm) detected by the first and second inspection units 91 and 93, it is possible to determine whether the shell is a pearl nucleus 13 using shellfish. It is possible to determine whether the pearl nucleus 13 is used.

  Therefore, it can also be determined whether the pearl nucleus 13 using white butterfly or the pearl nucleus 13 using clam shell.

  For this reason, only the pearl nucleus 13 extracted by the high-speed classification in the primary process can be discriminated in more detail in the secondary process, and the nucleus can be discriminated quickly and accurately.

  In addition, cores of isotropic materials such as artificial cores other than clam shells can be handled in the same way as clam shells, and whether they are cores made of shellfish or other materials. Can be determined.

  Even in this embodiment, it cannot be discriminated when a pearl layer is formed in the pearl nucleus, but it is effective for discriminating a perforated pearl in which a hole for passing a string through the pearl is formed.

  Hereinafter, Example 4 of the present invention will be described with reference to FIGS.

  In the present embodiment, the nucleus inspection apparatus 1 is used to discriminate between an anisotropic nucleus and no nucleus based on the magnetic susceptibility in the secondary process. In this embodiment, the case of shellfish and clam shell will be described as an example.

  That is, in the present embodiment, the magnetic susceptibility of the pearl nucleus 13 is measured by signals from the detection coil 23 and the comparison coil 25 while vibrating the pearl nucleus 13 at the tip of the support portion 15 by the vibration generator 17. The measurement of the magnetic susceptibility is performed by changing the strength of the magnetic field by controlling the magnetic pole 27 by the controller 7.

  As a result, measured values as shown in FIG. 19 were obtained.

  19 (a) and 19 (b) are detection results when using shellfish as a nucleus, (c) and (d) are detection results when using shellfish as a nucleus, and (e) and (f) are It is a detection result at the time of using a spotted shellfish as a nucleus, (a), (c), (e) is a graph which shows the magnetization change of the X-axis direction which is a uniaxial direction, (b), (d) , (F) is a graph showing the magnetization change in the Y-axis direction, which is the other-axis direction. The XY axes are two orthogonal axes. However, in the case of the shell of the shellfish and the shell of the shellfish containing spots, the X axis direction is the direction parallel to the stripe pattern described in FIG. 14, and the Y axis direction is orthogonal to the stripe pattern. The direction to do.

  As shown in this measurement result, when a shellfish is used for the pearl nucleus 13, when a clam shell is used for the pearl nucleus 13, it exhibits diamagnetic characteristics, and when a spotted shellfish is used for the pearl nucleus 13. Showed paramagnetic properties. When a shell with anisotropy in material was used for the pearl nucleus 13, a difference was found in the measurement results obtained by changing the support state with respect to the support portion 15.

  Specifically, in the comparison between (a) and (b), the value when going from the 0 point of (a) to the third stage is equal to the value of the fourth stage of (b), ( In e), the value from the 0 point to the 3rd step is the same as the value from the 0 point to the 2.5th step in (f). As is clear from this result, in the pearl nucleus 13 of the shellfish, a change appeared in the measured values of magnetic susceptibility in the X-axis direction and the Y-axis direction. On the other hand, in the measurement results of (c) and (d) using the clam shell for the pearl nucleus 13, both showed the same value, and the difference in the measured value could not be seen.

  As a result, the magnetization direction is measured by changing the support direction of the pearl nucleus 13 with respect to the support portion 15 in FIG. 2, and when the change in the magnetic susceptibility appears as described above, the pearl nucleus 13 using the shellfish is obtained. If it is discriminated and no difference is found, it can be discriminated that it is a pearl nucleus 13 using a clam shellfish.

  Similarly, it is also possible to determine whether the pearl nucleus 13 is a pearl nucleus 13 using a white butterfly shell or a pearl nucleus 13 using a clam shellfish.

  Therefore, as in the second embodiment, only the pearl nuclei 13 extracted by high-speed classification in the primary process can be determined in more detail in the secondary process, and the nuclei can be determined quickly and accurately.

  In this case, as in the case of the test liquid tank 51 of the second embodiment, when the pearl nucleus 13 is floated on the liquid and its direction is determined and only two directions are measured, early detection can be performed.

  FIG. 20 shows the results of measurement on a pearl having a pearl layer formed around the pearl nucleus, (a) and (b) are the results of detection of a pearl using a black butterfly shell as the pearl nucleus. d) is a result of pearl detection using a clam shell as a pearl nucleus, and (a) and (c) are graphs showing magnetization changes in the X-axis direction, which is a uniaxial direction, and (b) and (d). These are graphs showing the detection result of the magnetization change in the Y-axis direction which is the other axis direction.

Also in this case, as in the case of the test liquid tank 51 of the second embodiment, the pearl is floated on the liquid, and when the direction is determined and only the two directions are measured, the early detection can be performed. Even in the results, in the case of black pearls using black butterfly shells as pearl nuclei, there is a difference in the measurement results of (a) and (b) due to the anisotropy of the material, using clam shells as pearl nuclei. In the case of pearls, there was no difference as in (c) and (d).

  FIG. 21 is a chart showing numerical values of the ratio of magnetic susceptibility due to the change of the support state with respect to the support portion 15 based on the measurement results of FIGS. 19 and 20. In addition, in FIG. 21, the numerical value is also added about the white butterfly pearl using the white butterfly as a pearl nucleus.

  In FIG. 21, the susceptibility aspect ratio is a ratio obtained by changing the mounting state in the X-axis and Y-axis directions to the support portion 15 in FIG. 2 as described above. As a result, the shellfish core (the pearl nucleus of the shellfish) has a magnetic susceptibility aspect ratio of 15.6 to 83.0%, and the shellfish containing the shellfish (the pearl nucleus of the shelled shellfish) is 13.1 to 65.6. The white butterfly pearl is 34.40% and the black butterfly pearl is 9.20%, whereas the clam shell (the clam pearl nucleus) is 1.4 to 8.4%, and the clam pearl is It was 1.25 to 2.62%. Based on the difference in the detected values, the clam shell or the clam pearl can be clearly distinguished and discriminated.

  As a result, the controller 7 reads the detection results as shown in FIG. 19 and FIG. 20, and compares them as described above to convert isotropic nuclei such as pearl oyster shells and artificial nuclei into anisotropic nuclei. Can be discriminated against.

  FIG. 22 is a schematic overall plan view of a nuclear inspection apparatus 1C according to the fifth embodiment.

  The nuclear inspection apparatus 1C according to the present embodiment includes an outer coil 113, first and second inspection coils 115 and 117, a movable positioning body 121, and a controller 7C as a determination unit.

  The outer coil 113 is connected to a low frequency generator 119. The first and second inspection coils 115 and 117 are wound in opposite directions and arranged in the outer coil 113, and are connected to a balanced circuit on the controller 7C side. The controller 7C measures the voltage, and the measured voltage is the detected magnetization.

  The movable positioning body 121 is configured to support the spherical pearl nucleus 13 and to arrange and move the pearl nucleus 13 in the first and second inspection coils 115 and 117. The movable positioning body 121 includes a support frame 123. A connecting shaft 125 is connected to the support frame 123. The connecting shaft 125 is driven by a linear drive unit (not shown). The support frame 123 can be moved via the connecting shaft 125, and the pearl nucleus 13 can be arranged and moved in the first inspection coil 115 or the second inspection coil 117.

  When the controller 7C operates the connecting shaft 125 to position the pearl nucleus 13 in one of the first and second inspection coils 115, 117, the controller 7C adjusts the detected value of the other magnetization to zero. . After this zero adjustment, the pearl nucleus 13 is moved to a position where the detected value of the other magnetization of the first and second inspection coils 115 and 117 becomes zero (a position symmetrical with respect to the center and a position shown by a chain line in FIG. 22). The material of the pearl nucleus 13 is discriminated based on the magnetization in the intersecting two axes of the pearl nucleus 13 detected at the position.

  The detection of magnetization in the two intersecting axes is performed by rotating the pearl nucleus 13 on the support frame 123 and changing the directions of the X axis and the Y axis shown in FIG.

  23 and 24 show the rotational drive unit 133 of the movable positioning body 121, FIG. 23 is a cross-sectional view of the front end side of the support frame 123, and FIG. 24 is a cross-sectional view taken along the arrow SA-SA in FIG.

  As shown in FIGS. 23 and 24, a tray 127 is provided on the support frame 123. A rubber roller 131 is attached to a shaft 129 supported on the lower surface side of the support frame 123. The outer peripheral portion of the rubber roller 131 passes through the support frame 123 and the tray 127 and is in contact with the pearl nucleus 13. The shaft 129 is connected to a driving unit (not shown).

  Accordingly, when the shaft 129 is rotated by the drive of the drive unit, the rubber roller 131 is interlocked. When the rubber roller 131 is rotated, the pearl nucleus 13 in contact with the rubber roller 131 is also rotated. When the X axis of the pearl nucleus 13 is directed in the vertical direction before the rotation, the pearl nucleus 13 can be directed in the horizontal direction by the rotation.

  For determination, first, zero adjustment is performed in FIG. For example, the connecting shaft 125 is driven in the axial direction by a drive signal from the controller 7C. By this driving, the pearl nucleus 13 is positioned in the second inspection coil 117 via the support frame 123 and adjusted so that the detected magnetization on the first inspection coil 115 side becomes zero. This adjustment is performed under the control of the controller 7C, and the position at which the detected magnetization on the first inspection coil 115 side becomes zero is stored by the controller 7C.

  Next, the axial drive of the connecting shaft 125 is returned under the control of the controller 7C. With this driving return, the pearl nucleus 13 is arranged at the position of zero magnetization in the first inspection coil 115 via the support frame 123. At this time, since the first inspection coil 115 side has an opposite magnetic field, the difference magnetization is detected.

  This detection is measured by rotating the pearl nucleus 13 by driving the rotational drive unit 133 and changing the XY axis direction. The controller 7C compares the ratios of the measured values to determine whether the pearl nucleus 13 using an anisotropic shellfish or the pearl nucleus 13 using an isotropic clam shell or the like.

  FIG. 25 is a graph showing a shape index indicating the anisotropy of magnetization.

  In FIG. 25, a point 135 is a shape index obtained from the measurement ratio when the shellfish is a pearl nucleus, and a point 137 is a shape index obtained from the measurement ratio of the pearl using the shellfish pearl nucleus. , 139 is a shape index obtained from the measurement ratio when the clam shell is a pearl nucleus.

  As shown in FIG. 25, when the clam shell is a pearl nucleus, the shape index is collected within a certain range. For this reason, the pearl nucleus using the shellfish other than the clam shell and the pearl nucleus using the clam shell can be clearly distinguished and discriminated.

  Therefore, as in the second embodiment, only the pearl nuclei 13 extracted by high-speed classification in the primary process can be determined in more detail in the secondary process, and the nuclei can be determined quickly and accurately.

  In the nuclear inspection method and apparatus of the present invention, the pearl nuclei used in each of the above examples are the pearl nuclei after the pearl layer is formed, or the nuclei used other than the pearls, It can also be used to inspect the material of the core covered with the covering material.

1 is a perspective view of a nuclear inspection apparatus (Example 1). FIG. 1 is a schematic overall view of a nuclear inspection apparatus (Example 1). (Example 1) which is the principal part expansion schematic of a nuclear inspection apparatus. It is a front view which shows the nucleus at the time of applying a magnetic field to a nucleus, (a) is a case where a magnetic field is applied in the direction along a stripe pattern, (b) is applying a magnetic field in the direction which crosses a stripe pattern. (Example 1). It is a graph which shows the change state of the weight magnetic susceptibility in the cross | intersection 2 axis | shaft of the nucleus using a shellfish or a clam shell (Example 1). It is a graph which shows the distribution of the average weight magnetic susceptibility of the nucleus using a clam shell, a white butterfly shell, a shellfish, or a shellfish containing a shellfish, (a) when using a giant clam shell as a nucleus, (b) is white When a butterfly shell is used as a nucleus, (c) shows a case where a shellfish is used as a nucleus, and (d) shows a case where a so-called spotted shellfish having a stain on the surface or the like is used as a nucleus. It is a graph which shows distribution of the weight magnetic susceptibility of the nucleus using a clam shell or a white butterfly shell, (a) shows the case where a clam shell is used as a nucleus, and (b) shows the case where a white shellfish is used as a nucleus. ing. 1 is an overall view of a weight measuring device (Example 1). It is a graph which shows the specific gravity distribution of the nucleus using a clam shell or a white butterfly shell, (a) shows the case of the nucleus using a clam shell, and (b) shows the case of the nucleus using a white clam shell ( Example 1). (Example 2) which is a schematic plan view of the nuclear inspection apparatus used for a secondary process. (Example 2) which is a principal part schematic side view of the nuclear inspection apparatus used for the following process. The light transmission state in the crossing 2 axis | shafts of the nucleus using a shellfish is shown, (a) is the light transmission state figure of a uniaxial direction, (b) is the light transmission state figure in the other-axis direction (Example 2) ). The light transmission state of the nucleus using a clam shell is shown, (a) is a light transmission state diagram in one axis direction, (b) is a light transmission state diagram in the other axis direction (Example 2). (A) is a schematic sectional drawing of the pearl nucleus using a shellfish, (b) is the principal part expanded sectional view, (c) is a schematic diagram which shows a crossing board structure (Example 2). It is a graph which shows the relationship between the light transmittance of a nucleus, and a wavelength (Example 2). It is a graph which shows the relationship between the light reflectivity of a nucleus, and a wavelength (Example 2). (Example 3) which is a schematic plan view of the nuclear inspection apparatus which concerns on this invention. It is the principal part schematic which concerns on a modification (Example 3). (A), (b) are detection results when shellfish are used as nuclei, (c), (d) are detection results when shellfish shells are used as nuclei, (e), (f) are spotted It is a detection result when using a shellfish as a nucleus, (a), (c), (e) are graphs showing changes in magnetic force in one axis direction, (b), (d), (f) are It is a graph which shows the magnetic force change in an other axis direction (Example 4). (A), (b) are pearl detection results using black butterfly shells as nuclei, (c), (d) are pearl detection results using clam shells as nuclei, (a), ( c) is a graph showing the magnetic force change in one axis direction, and (b) and (d) are graphs showing the detection result of the magnetic force change in the other axis direction (Example 4). It is a graph which shows the magnetic susceptibility aspect ratio by the nucleus of each material (Example 4). (Example 5) which is a general | schematic whole plan view of the inspection apparatus of the nucleus which concerns on this invention. (Example 5) which is sectional drawing which shows a rotation drive part. (Example 5) which is sectional drawing which shows the rotational drive part seen from the SA-SA arrow direction of FIG. It is a graph which shows the shape index calculated | required from the measurement ratio of magnetization (Example 5).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inspection apparatus 3 Support means 5 Magnetic susceptibility inspection means 7 Controller (discriminating means)
13 Pearl nucleus 15 Support part

Claims (7)

A non-magnetic support means capable of imparting vibration to the core removably supported by the support section;
Magnetic susceptibility inspection means capable of detecting a magnetic susceptibility of the nucleus by applying a magnetic field to the nucleus;
An inspection apparatus for a nucleus comprising: discrimination means for discriminating the nucleus based on a weight magnetic susceptibility calculated from the detected magnetic susceptibility of the nucleus and the weight of the nucleus. The nuclear inspection apparatus according to claim 1,
The nucleus inspection apparatus is characterized in that the support means rotatably supports the nucleus, and the rotation position of the magnetic field applied to the nucleus can be changed by the rotation. The nuclear inspection apparatus according to claim 2,
The nucleus inspection apparatus, wherein the support means rotates the nucleus within a range of 180 degrees.   A nucleus inspection method for distinguishing nuclei by comparing the susceptibility and weight susceptibility obtained from the nuclei. A primary step of primary discrimination by comparing the magnetic susceptibility obtained from the magnetic susceptibility and weight of the nucleus;
A nucleus inspection method, comprising: a secondary step of secondaryly discriminating the nuclei extracted in the primary step by comparing specific gravity. A primary step of primary discrimination by comparing the magnetic susceptibility obtained from the magnetic susceptibility and weight of the nucleus;
A secondary step of secondarily discriminating between a nucleus having anisotropy and a core having no anisotropy in the material by detecting anisotropy in the intersecting two axes of the nucleus extracted in the primary step; Nuclear inspection method characterized by that. The nuclear inspection method according to claim 6,
The detection of anisotropy in the secondary process is performed using rotation of the nucleus due to buoyancy in the liquid, or the magnetic susceptibility of the nucleus, the light transmittance of the nucleus, or the light reflectance of the nucleus. Characteristic nuclear inspection method.

Images