JP2017215145A - Inner quality determination system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inner quality determination system that can highly accurately determine an inner quality even if a size of a plurality of measurement objects having a part not transmitting light such as a seed and the like inside is different.SOLUTION: A light reception unit receiving transmission light transmitting a measurement object is configured to be movable in a prescribed direction by a movement mechanism in a tilting state where the light reception unit is located on an opposite side of a light projection unit across the measurement object and the light reception axis is tilted at a prescribed angle with respect to a light projection axis of the light projection unit. On the basis of size information from a size detection unit and preliminarily stored light reception position data, a control device is configured to decide a light reception position to be located with respect to a prescribed direction by the light reception unit upon detecting inner quality information of the measurement object; and determine the inner quality of the measurement object on the basis of the inner quality information to be detected by the light reception unit in a state causing the movement mechanism to locate the light reception unit at the light reception position.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an internal quality determination system that determines the internal quality of an object to be measured such as agricultural products having large seeds such as mango and avocado.

  An internal quality determination system that irradiates a measurement object with light and receives internal transmitted light and spectrally processes the transmitted light to determine the internal quality of the measurement object is known.

  For example, in the following Patent Document 1, a transport unit that transports an object to be measured so as to pass through an internal quality measurement point, a light projecting unit that irradiates light so as to cross the object to be measured at the internal quality measurement point, and a crossing In an internal quality determination system including a light projecting / receiving unit having a light receiving unit that receives light transmitted in a direction, and a control unit that analyzes the internal quality of an object to be measured based on the light received by the light projecting / receiving unit, Appearance detection means is provided for detecting appearance information of an object to be measured at an appearance inspection measurement position upstream of the internal quality measurement position in the transport direction, and the control device is based on the size information of the object to be measured by the appearance detection means. Thus, it has been proposed to adjust the detection condition when detecting the internal quality information of the object to be measured by the light projecting / receiving unit.

  Specifically, in Patent Document 1, as the adjustment of the detection condition, the light projecting / receiving unit adjusts the light projecting / receiving amount when detecting the internal quality information of the object to be measured (hereinafter referred to as the first adjustment). And / or adjusting the relative position between the light projecting unit and the light receiving unit and the measured object when the light projecting / receiving unit detects the internal quality information of the measured object (hereinafter referred to as the second). Adjustment)).

  However, in the internal quality determination system described in Patent Document 1, when the measurement object has a large species such as mango or avocado, the internal quality of the measurement object cannot be accurately determined due to the influence of the species. There was a problem.

  Specifically, the first adjustment increases the light projection intensity by the light projecting unit as the object to be measured is larger in consideration of the fact that the amount of transmitted light decreases as the object to be measured increases.

  However, this first adjustment does not assume that the object to be measured has a large seed. Therefore, when the object to be measured has a large seed, the size of the object to be measured from the light projecting unit. Even if the object to be measured is irradiated with an appropriate amount of light corresponding to the light, much of the light is blocked by the seed of the object to be measured. It may happen that the light does not reach.

  In addition, the second adjustment is performed by moving the light projecting unit and the light receiving unit integrally according to the size of the object to be measured, regardless of the size of the object to be measured. The transmitted light that has been irradiated to the part and transmitted through the object to be measured is received by the light receiving part.

  However, this second adjustment also does not assume that the object to be measured has a large seed. Therefore, when the object to be measured has a large seed, the light from the light projecting unit is not measured. Although the light is properly irradiated, much of the light that has entered the inside of the object to be measured is blocked by the seed of the object to be measured, and as a result, a sufficient amount of light does not reach the light receiving unit. Can happen.

  Patent Document 2 below discloses a transport unit that transports an object to be measured so as to pass through an internal quality measurement point, and a projection that irradiates light from below the transport unit toward the object to be measured at the internal quality measurement point. In an internal quality determination system comprising an optical part, a light receiving part for receiving light transmitted through the object to be measured, and a control means for analyzing the internal quality of the object to be measured based on the light received by the light receiving part, A size detecting means for detecting the size of the object to be measured at the size measuring position upstream of the internal quality measuring position, and a chopping means disposed between the light projecting unit and the object to be measured; The light receiving unit is configured to receive and accumulate transmitted light from the measurement object at a light receiving timing synchronized with the chopping frequency of the chopping means, and the control device detects the magnitude by the size detecting means. Be configured is disclosed to determine the number of light reception times of said light receiving means in accordance with the size of the object to be measured to be.

  In the internal quality determination system described in Patent Document 2, in view of the fact that the amount of transmission decreases when the object to be measured is large, when the object to be measured is large, the light reception integration time by the light receiving means is increased. The / N ratio is improved, and when the object to be measured is small, the light reception integration time by the light receiving means is shortened so as to avoid the direct reflection of light from the periphery of the object to be measured.

  Although the patent document 2 shows a form in which the light receiving optical axis of the light receiving unit is inclined with respect to the light projecting optical axis from the light projecting unit, the patent document 2 also describes the object to be measured. No consideration is given to the deterioration in accuracy of internal quality judgment due to seeds.

Japanese Patent Laid-Open No. 2002-174582 JP-A-6-300680

  The present invention has been made in view of such a conventional technique, and has an internal portion that does not transmit light such as seeds, and can accurately determine the internal quality of each of a plurality of measurement objects having different sizes. The purpose is to provide an internal quality judgment system.

  In order to achieve the above object, the present invention provides a size detection region and a transport unit that transports a measurement object so as to pass through an internal quality detection region downstream in the transport direction from the size detection region, and the size. A size detector that detects size information of the measurement object in the detection region; an internal quality detection unit that detects internal quality information of the measurement object in the internal quality detection region; and a control device, and the internal quality The detection unit is fixedly installed so as to project measurement light toward the measurement object located in the internal quality detection region, and on the opposite side of the light projection unit across the measurement object. A light receiving unit that receives the transmitted light that has passed through the measurement object in a state where the light receiving optical axis is positioned and the light receiving optical axis is inclined at a predetermined angle with respect to the light projecting optical axis of the light projecting unit; Movable control mechanism, and the control The light receiving position data in which the light receiving position in the predetermined direction of the light receiving unit is set according to the size of the measurement object is stored in the device, and the control device receives the size from the size detecting unit. Internal quality information detected by the light receiving unit in a state where the moving mechanism is operated so that the light receiving unit is positioned at a predetermined light receiving position determined based on information and the light receiving position data An internal quality determination system configured to determine the internal quality of the one measurement object is provided.

  In the first embodiment, the transport unit has a plurality of transport trays arranged in series in the transport direction, and the transport tray is an opening that allows a measurement object to be placed and allows measurement light to pass therethrough. It has a main surface provided with.

  In this case, the light projecting unit is disposed so as to project measurement light onto the measurement object from below the transport unit through the opening, and the light receiving unit is a measurement target placed on the transport tray. The light receiving optical axis is tilted by the predetermined angle to the other side in the transport width direction with respect to the downward direction at a position above the object and displaced from the center of the measurement object in the transport width direction to one side in the transport width direction. The light-receiving optical axis has a downward direction at a position that is displaced above the measurement object placed on the conveyance tray and from the center of the measurement object in the conveyance width direction to the other side in the conveyance width direction. And a second light receiving portion that is inclined to the one side in the transport width direction by the predetermined angle.

  In the second embodiment, the light projecting unit is arranged to project measurement light onto the measurement object from one side in the conveyance width direction, and the light receiving unit is the measurement object placed on the conveyance tray. The light receiving optical axis is inclined toward the downstream side in the transport direction by the predetermined angle with respect to the transport width direction at a position displaced further from the transport direction center of the measurement object to the upstream side in the transport direction. A light receiving optical axis at a position displaced on the other side in the conveyance width direction from the measurement object placed on the conveyance tray and on the downstream side in the conveyance direction from the center in the conveyance direction of the measurement object. And a second light receiving portion inclined by the predetermined angle toward the upstream side in the transport direction with respect to the transport width direction.

  In this case, the transport unit has an opening that allows the measurement light from the light projecting unit to be projected onto the measurement object, and the measurement light from the light projecting unit is the first and A shielding plate that prevents direct entry into the second light receiving unit is provided.

  In the first embodiment, a predetermined direction in which the light receiving unit is moved by the moving mechanism may be a vertical direction.

  In the first and second embodiments, the predetermined direction in which the light receiving unit is moved by the moving mechanism may be the light receiving optical axis direction of the light receiving unit or the conveyance width direction.

  In the second embodiment, the predetermined direction in which the light receiving unit is moved by the moving mechanism may be a transport direction.

  According to the internal quality determination system according to the present invention, the light receiving unit is movable in a predetermined direction by the moving mechanism, and based on the size information and the light receiving position data from the size detecting unit, the control device When detecting the internal quality information of one measurement object, the light receiving unit determines a light receiving position that should be positioned in the predetermined direction, and the light receiving unit is positioned in the light receiving position by the moving mechanism. Since the internal quality of the one measurement object is determined based on the internal quality information detected by the unit, the sizes of the plurality of measurement objects having large species such as mango and avocado are different. Even in such a case, it is possible to accurately determine the internal quality of each of the plurality of measurement objects having different sizes without requiring a complicated mechanism.

FIG. 1 is a schematic plan view of an internal quality determination system according to Embodiment 1 of the present invention. FIG. 2 is a schematic longitudinal sectional view in the internal quality detection area of the internal quality determination system along the line II-II in FIG. 1, and detects the internal quality information of the measurement object of size “large”. It shows the state. FIG. 3 is a schematic longitudinal sectional view corresponding to FIG. 2 and shows a state in which the internal quality information of the measurement object having the size “small” is detected. FIG. 4 is a schematic longitudinal sectional view in the internal quality detection region of the internal quality determination system according to the first modification of the first embodiment, which detects internal quality information of a measurement object having a size “large”. It shows the state. FIG. 5 is a schematic longitudinal sectional view corresponding to FIG. 4 and shows a state in which the internal quality information of the measurement object having the size “small” is detected. FIG. 6 is a schematic longitudinal sectional view in the internal quality detection area of the internal quality determination system according to the second modification of the first embodiment, which detects internal quality information of a measurement object of size “large”. It shows the state. FIG. 7 is a schematic longitudinal sectional view corresponding to FIG. 6 and shows a state in which the internal quality information of the measurement object having the size “small” is detected. FIG. 8 is a schematic plan view of an internal quality determination system according to Embodiment 2 of the present invention. FIG. 9 is a schematic cross-sectional view in the internal quality detection region of the internal quality determination system according to the second embodiment, showing a state in which the internal quality information of the measurement object having the size “large” is detected. ing. FIG. 10 is a schematic cross-sectional view corresponding to FIG. 9 and shows a state in which the internal quality information of the measurement object having the size “small” is detected. FIG. 11 is a schematic cross-sectional view in the internal quality detection region of the internal quality determination system according to the first modification of the second embodiment, and detects the internal quality information of the measurement object having the size “large”. It shows the state. FIG. 12 is a schematic cross-sectional view corresponding to FIG. 11 and shows a state in which internal quality information of a measurement object having a size “small” is detected. FIG. 13 is a schematic cross-sectional view in the internal quality detection region of the internal quality determination system according to the second modification of the second embodiment, and detects the internal quality information of the measurement object having the size “large”. It shows the state. FIG. 14 is a schematic cross-sectional view corresponding to FIG. 13 and shows a state in which the internal quality information of the measurement object having the size “small” is detected.

Embodiment 1
Hereinafter, a preferred embodiment of an internal quality determination system according to the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows a schematic plan view of an internal quality determination system 1A according to the present embodiment.

  As shown in FIG. 1, the internal quality determination system 1 according to the present embodiment detects the size information of the conveyance unit 10 that conveys the measurement object and the measurement object 300 that is conveyed by the conveyance unit 10. A size detection unit (not shown), an internal quality detection unit 30 that detects internal quality information of the measurement object 300, and a control device 100.

  In the present embodiment, as shown in FIG. 1, the transport unit 10 includes a drive rotator 11 such as a drive sprocket, a driven rotator 12 such as a driven sprocket, the drive rotator 11 and the driven rotator. A first endless body 15 (1) such as a chain wound around one side in the transport width direction of the second and a second end such as a chain wound around the other side in the transport width direction of the drive rotator 11 and the driven rotator. An endless body 15 (2) and a tray 20 having a main surface 21 on which the measurement object 300 is placed and supported and conveyed by the first and second endless bodies 15 (1) and 15 (2). have.

  The transport unit 10 transports the tray 20 with the main surface 21 facing upward, and the tray 10 with the main surface 21 facing downward from the end of the transport area to the start of the transport area. 20 and a return area for returning and transporting.

  As shown in FIG. 1, the transport area has a size detection region 10B and an internal quality detection region 10C located downstream in the transport direction from the size detection region 10B, and the size detection unit The size information of the measurement object 300 is detected in the size detection area 10B, and the internal quality detection unit 30 detects the internal quality information of the measurement object 300 in the internal quality detection area 10C.

  As shown in FIG. 1, in the present embodiment, the transport area is further transported from a placement area 10A provided upstream in the transport direction from the size detection area 10B and from the internal quality detection area 10C. And a sorting area 10D provided on the downstream side in the direction.

  The placement area 10A is a work area in which the measurement target 300 is placed on the main surface 21 of the tray 20, and the sorting area 10D is a measurement target on the main surface 21 of the tray 20 based on an internal quality determination result. This is an area where the sorting operation of the objects 300 is performed.

The size detection unit detects information related to the size of the measurement object 300 conveyed by the conveyance unit 10.
The “size” of the measurement object includes a flat area or a height, and the size detection unit may have various forms such as a CCD camera and a photoelectric sensor.

FIG. 2 shows a schematic cross-sectional view along the line II-II in FIG.
As shown in FIG. 2, the internal quality detection unit 30 includes a light projecting unit 31, a light receiving unit 35, and a moving mechanism 40 that moves the light receiving unit 35 in a predetermined direction.

The light projecting unit 31 is fixedly installed so as to project measurement light toward the measurement object 300 located in the internal quality detection region 10C.
As shown in FIG. 2, in the present embodiment, the light projecting unit 31 is disposed so as to project measurement light from below to above the transport unit 10.

  Specifically, as shown in FIG. 2, the main surface 21 of the tray 20 on which the measurement object 300 is placed is provided with an opening 22 that allows measurement light to pass therethrough, and the light projecting unit 31. The measurement light projected from is irradiated to the measurement object 300 from below through the opening 22.

  As the light projecting unit 31, a halogen lamp, a xenon lamp, an LED lamp, or the like that can irradiate light having a wavelength in the near infrared region is used.

The light receiving unit 35 is disposed on the side opposite to the light projecting unit 31 with the measurement object 300 interposed therebetween so as to receive light transmitted through the measurement object 300.
As described above, in the present embodiment, the light projecting unit 31 projects measurement light from the bottom to the top of the transport unit 10, and thus the light receiving unit 35 is configured to transmit the light receiving unit 35. It is arranged so as to be able to receive transmitted light that travels from below to above in the upper part.

  Specifically, as shown in FIG. 2, the light receiving unit 35 has a direction of the measuring object 300 in a state where the light receiving optical axis 35 </ b> X is inclined by a predetermined inclination angle α with respect to the light projecting optical axis of the light projecting unit 31. Thus, the field of view 35V of the light receiving unit 35 can cover the inside of the measuring object 300 as widely as possible while avoiding the seeds of the measuring object 300.

  The inclination angle α of the light receiving optical axis 35X with respect to the light projecting optical axis is based on experience based on the viewing angle of the light receiving unit 35, the size of the measurement object 300, the size of the species of the measurement object 300, and the like. Is set automatically.

When the front end of an optical fiber whose rear end is optically connected to the spectroscopic device 70 described below is used as the light receiving unit 35, the viewing angle of the light receiving unit 35 is about 23 °, for example.
In such a configuration, the light receiving optical axis 35X of the light receiving unit 35 is inclined at an angle of, for example, 30 ° to 40 °, preferably 35 ° with respect to the light projecting optical axis.

  In the internal quality determination system 1A according to the present embodiment, as the light receiving unit 35, a first light receiving unit 35 (1 that receives transmitted light from one side and the other side in the transport width direction from the seed of the measurement object 300, respectively. ) And the second light receiving portion 35 (2).

  In this case, the light receiving optical axis 35 (1) X of the first light receiving unit 35 (1) and the light receiving optical axis 35 (2) X of the second light receiving unit 35 (2) are based on the light projecting optical axis. It is tilted symmetrically.

  That is, the first light receiving unit 35 (1) is displaced from the center of the measurement object 300 in the conveyance width direction to one side in the conveyance width direction, and the light reception optical axis 35 (1) X is based on the downward direction. While the second light receiving portion 35 (2) is inclined to the other side of the conveyance width direction by the predetermined angle α, the second light receiving unit 35 (2) is displaced from the center of the measurement object 300 in the conveyance width direction to the other side of the conveyance width direction. The light receiving optical axis 35 (2) X is inclined by the predetermined angle α to one side in the transport width direction with reference to the downward direction.

The moving mechanism 40 is configured to move the light receiving unit 35 in a predetermined direction.
In the present embodiment, the moving mechanism 40 can move the light receiving unit 35 in a direction parallel to the light projecting optical axis of the light projecting unit 31.

The moving mechanism 40 can take various forms as long as the light receiving unit 35 can be moved in a predetermined direction.
In the present embodiment, the moving mechanism 40 includes a cylinder 41 that is fixedly installed, and a piston 42 that is movable forward and backward along the predetermined direction with respect to the cylinder 41. Since the light receiving part 35 is supported by the free end of the light receiving part 35, the light receiving part 35 can be moved in the predetermined direction.

  Note that the internal quality determination system 1A according to the present embodiment uses the first and second light receiving portions 35 (1) and 35 (2) as the moving mechanism 40 to move in the predetermined direction, respectively. It has 2nd moving mechanism 40 (1) and 40 (2).

  Alternatively, a single moving mechanism 40 may be configured to move the first and second light receiving portions 35 (1) and 35 (2) integrally in the predetermined direction.

  The control device 100 determines the internal quality of the measurement object 300 based on the internal quality information detected by the light receiving unit 35.

As described above, in the present embodiment, a tip portion of an optical fiber is used as the light receiving unit 35.
In this case, the internal quality determination system 1A includes a spectroscopic device 70 to which the rear end of the optical fiber is optically connected.

The spectroscopic device 70 divides the transmitted light of the measuring object 300 received by the light receiving unit 35 to generate spectral information such as a spectral signal.
Then, the control device 10 determines the internal quality of the measurement object 300 based on the spectral information from the spectroscopic device 70.

That is, the control device 100 stores threshold data related to specific internal quality such as sugar content in advance.
The control device 100 determines the internal quality of the measurement target 300 based on the comparison between the spectral information of one measurement target 300 received from the spectroscopic device 70 and the threshold data.

  In addition, the internal quality determination system 1A according to the present embodiment includes a first and second optically connected to the first and second light receiving units 35 (1) and 35 (2) as the spectroscopic device 70, respectively. It has the 2nd spectroscopy apparatus 70 (1) and 70 (2).

  The control device 100 is further configured to perform operation control of the moving mechanism 40 based on size information from the size detection unit.

  Specifically, the control device 100 stores light reception position data in which the light reception position in the predetermined direction of the light receiving unit 35 is set according to the size of the measurement object 300 in advance.

For example, the control device 100 distinguishes the size of the measurement object 300 into two types of “large” and “small” based on the size information from the size detection unit.
In this case, the light receiving position data includes a “large” light receiving position and a “small” light receiving position.

  Of course, the size of the measurement object 300 can be distinguished into three or more types, and the light reception position data has a light reception position set for each size of the measurement object 300 to be distinguished. Is done.

  Here, a case where the control device 100 is configured to distinguish the size of the measurement object 300 into two types of “large” and “small” based on the size information from the size detection unit. As an example, the operation of the internal quality determination system 1A will be described.

For example, it is assumed that a measurement object having a size “large” (hereinafter, referred to as a first measurement object 300 (1)) has reached the size detection region 10B.
In this case, the control device 100 determines that the size of the first measurement object 300 (1) is “large” based on the size information from the size detection unit.

  Note that the control device 100 indicates that the first measurement object 300 (1) has reached the size detection region 10B by, for example, a signal from the size detection region position sensor 111 (see FIG. 1). recognize.

  In this case, upon detecting that the first measurement object 300 (1) has reached the internal quality detection region 10C by the transport unit 10, the control device 100 sets the light receiving unit 35 to the light receiving position data. The internal quality information from the light receiving unit 35 is input in a state of being positioned at the “large” light receiving position grasped based on the first measurement object 300 (1) based on the internal quality information thus input. Perform internal quality judgment.

  Note that the control device 100 indicates that the first measurement object 300 (1) has reached the internal quality detection region 10C, for example, a signal from the internal quality detection region position sensor 112 (see FIG. 1), Alternatively, it can be recognized by the elapsed time from the timing of passing through the size detection region 10 </ b> B and the transport speed of the transport unit 10.

  Here, the light receiving position for “large” is as much as possible while avoiding the seed 310 with respect to the first measuring object 300 (1) whose viewing range 35 V of the light receiving unit 35 is “large”. It is set so as to cover a large internal area (see FIG. 2).

That is, the “large” light receiving position is a position where as much transmitted light as possible from the first measurement object 300 (1) having the size “large” can be received.
This “large” light receiving position is determined by experiments or the like.

  On the other hand, when the measurement object 300 having the size “small” (hereinafter referred to as the second measurement object 300 (2)) has reached the size detection region 10B, the control device 100 detects the size detection. Based on the size information from the part, the size of the second measuring object 300 (2) is determined as “small”.

  In this case, when detecting that the second measurement object 300 (2) has reached the internal quality detection region 10C by the transport unit 10, the control device 100 sets the light receiving unit 35 to the light receiving position data. Internal quality information from the light receiving unit 35 is input in a state where the light receiving position for “small” is determined based on the second measurement object 300 (2) based on the input internal quality information. Perform internal quality judgment.

  Here, the light receiving position for “small” is as much as possible while avoiding the seed 310 with respect to the second measuring object 300 (2) whose field of view range 35 V of the light receiving unit 35 is “small”. It is set by experiments or the like so as to cover a large internal area.

FIG. 3 is a schematic longitudinal sectional view taken along line II-II in FIG. 1 in a state where the second measurement object 300 (2) having the size “small” is positioned in the internal quality detection region 10C.
In FIG. 3, the light receiving portion 35 in the state of being positioned at the “large” light receiving position is indicated by a solid line, and the visual field range 35V at that time is indicated by a broken line, and the light receiving portion in the state of being positioned at the “small” light receiving position. 35 and the visual field range 35V at that time are indicated by a two-dot chain line.

As shown in FIG. 3, when the light receiving unit 35 is positioned at the “large” light receiving position and receives transmitted light from the second measurement object 300 (2) having the size “small”. In the visual field range 35V (see the broken line) of the light receiving unit 35, the seed 310 of the second measurement object 300 (2) is included.
Accordingly, the amount of transmitted light of the second measurement object 300 (2) that can be received by the light receiving unit 35 is reduced, and it is difficult to accurately determine the internal quality of the second measurement object 300 (2).

  In view of this point, in the present embodiment, when the second measurement object 300 (2) having a size “small” reaches the internal quality detection region 10C, the control device 100 causes the moving mechanism 40 to After the light receiving unit 35 is moved to the “small” light receiving position (see the two-dot chain line in FIG. 3), the transmitted light from the second measurement object 300 (2) is received.

Therefore, as shown in FIG. 3, the light receiving unit 35 can receive as much transmitted light as possible from the second measurement object 300 (2), and the inside of the second measurement object 300 (2). Quality judgment can be performed with high accuracy.
In the illustrated embodiment, the “small” light receiving position is a position moved downward by L along the light projecting optical axis as compared with the “large” light receiving position.

  As described above, according to the internal quality determination system 1A according to the present embodiment, the light receiving unit 35 is moved in a predetermined direction (vertical direction in the present embodiment) while having an extremely simple configuration. The light receiving unit 35 can receive as much transmitted light as possible with respect to the measurement object 300 of various sizes, and the accuracy of the internal quality of the measurement object 300 is improved. be able to.

Note that the predetermined direction, which is the moving direction of the light receiving unit 35, may be the light receiving optical axis direction of the light receiving unit 35 instead of the vertical direction along the light projecting optical axis.
4 and 5 are schematic longitudinal sectional views in the internal quality detection region 10C in the internal quality determination system 1B according to the first modification example in which the light receiving unit 35 is movable in the light receiving optical axis direction.

  FIG. 4 shows a state in which the first measurement object 300 (1) having the size “large” is positioned in the internal quality detection region 10C, and the light receiving unit 35 is positioned in the light reception position for “large” accordingly. The visual field range 35V of the light receiving unit 35 is indicated by a broken line.

On the other hand, FIG. 5 shows a state in which the second measurement object 300 (2) having the size “small” is positioned in the internal quality detection region 10C, and the light receiving unit 35 is set to the “large” light receiving position. The state of being positioned is indicated by a solid line and the visual field range 35V at that time is indicated by a broken line, and the state where the light receiving unit 35 is positioned at the “small” light receiving position and the visual field range 35V at that time is indicated by a two-dot chain line. ing.
In the first modification 1B, the “small” light receiving position is a position moved downward by L along the light receiving optical axis as compared to the “large” light receiving position.

  Also in the first modified example 1B, the same effect as in the present embodiment can be obtained.

In addition, the predetermined direction, which is the moving direction of the light receiving unit 35, can be changed to the transport width direction instead of the vertical direction along the light projecting optical axis and the light receiving optical axis direction.
6 and 7 are schematic longitudinal sectional views in the internal quality detection region 10C in the internal quality determination system 1C according to the second modification example in which the light receiving unit 35 is movable in the conveyance width direction.

  FIG. 6 shows a state in which the first measurement object 300 (1) having the size “large” is positioned in the internal quality detection region 10C, and the light receiving unit 35 is positioned in the light reception position for “large” accordingly. The visual field range 35V of the light receiving unit 35 is indicated by a broken line.

On the other hand, FIG. 7 shows a state in which the second measurement object 300 (2) having the size “small” is positioned in the internal quality detection region 10C, and the light receiving unit 35 is set to the “large” light receiving position. The state of being positioned is indicated by a solid line and the visual field range 35V at that time is indicated by a broken line, and the state where the light receiving unit 35 is positioned at the “small” light receiving position and the visual field range 35V at that time is indicated by a two-dot chain line. ing.
In the second modification 1C, the “small” light receiving position is a position moved by L outward in the transport width direction as compared with the “large” light receiving position.

  Also in the second modified example 1C, the same effect as in the present embodiment can be obtained.

Preferably, the internal quality detection area 10 </ b> C can be a dark room space covered with a shielding member 15.
According to such a configuration, the influence of disturbance light can be prevented as much as possible.

  As shown in FIG. 1, the internal quality determination systems 1 </ b> A to 1 </ b> C further include display means 90 such as a monitor for displaying the internal quality determination result of one measurement object 300 by the control device 100. it can.

  In this case, the control device 90 determines that the one measurement object 300 is based on the signal from the sorting area position sensor 113 or the elapsed time from the passing time of the internal quality detection area 10C and the transport speed of the transport unit 10 in the sorting area 10D. Is detected, the determination result of the one measurement object 300 is displayed on the display unit 90.

  According to such a configuration, the worker can sort the one measurement object 300 based on the determination result displayed on the display unit 90.

  Instead, the internal quality determination systems 1A to 1C are provided with a payout mechanism (not shown) that pays out the measurement object 300 from the transport mechanism 10 to the corresponding sorting position in the sorting area 10D. However, it is possible to configure the payout mechanism to operate based on the determination result of the internal quality.

Embodiment 2
Hereinafter, another embodiment of the internal quality determination system according to the present invention will be described with reference to the accompanying drawings.
FIG. 8 is a schematic plan view of the internal quality determination system 2A according to the present embodiment.
In the figure, the same members as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted as appropriate.

  The internal quality determination system 2A according to the present embodiment is arranged such that the light projecting unit 31 projects measurement light from the measurement object 300 toward the measurement object 300 from one side in the transport width direction. The internal quality determination system 1A according to the first embodiment is different in that the light receiving unit 35 is disposed so as to receive transmitted light from the measurement target 300 on the other side in the transport width direction from the measurement target 300. It is different.

  In FIGS. 9 and 10, the first measurement object 300 (1) having a size “large” and the second measurement object 300 (2) having a size “small” are placed in the internal quality detection region 10C, respectively. A schematic cross-sectional view of the internal quality detection region 10C in a positioned state is shown.

  FIG. 9 shows a state in which the light receiving unit 35 is positioned at the “large” light receiving position according to the first measurement object 300 (1) having the size “large”, and the visual field range at that time 35V is indicated by a broken line.

  On the other hand, FIG. 9 shows a state in which the light receiving unit 35 is positioned at the “large” light receiving position by a solid line and a visual field range 35V at that time by a broken line, and the light receiving unit 35 is a “small” light receiving position. And the visual field range 35V at that time are indicated by a two-dot chain line.

  In the present embodiment, the first light receiving unit 35 (1) is on the opposite side of the light projecting unit 31 with the measurement object 300 in the conveyance width direction and the measurement object 300 in the conveyance direction. The light receiving optical axis 35 (1) X is disposed so as to be inclined at the predetermined angle α toward the downstream side in the transport direction with respect to the transport width direction in a state of being displaced upstream from the center in the transport direction.

  On the other hand, the second light receiving unit 35 (2) is opposite to the light projecting unit 31 with respect to the conveyance width direction with respect to the measurement object 300, and downstream from the conveyance direction center of the measurement object 300 with respect to the conveyance direction. The light receiving optical axis 35 (2) X is disposed so as to be inclined by the predetermined angle α toward the upstream side in the transport direction with reference to the transport width direction.

  In the present embodiment, the predetermined direction in which the light receiving unit 35 can be moved by the moving mechanism 40 is a conveyance width direction.

  Specifically, in the case of the first measuring object 300 (1) having the size “large”, the control device 100 causes the light receiving unit 35 to be positioned at the “large” light receiving position as shown in FIG. Thus, the moving mechanism 40 is operated.

  Here, the “large” light receiving position is from the first measuring object 300 (1) while preventing the seed of the first measuring object 300 (1) from entering the visual field range 35 V of the light receiving unit 35. The position is such that it can receive as much transmitted light as possible.

  On the other hand, when the light receiving unit 35 is left in the “large” light receiving position (see the solid line in FIG. 10) with respect to the second measurement object 300 (2) having the size “small”, the light receiving is performed. A region deviating from the second measurement object 300 (2) in the visual field range 35V (see the broken line in FIG. 10) of the part 35 widens, and the amount of light transmitted through the second measurement object 300 (2) is reduced. .

  Therefore, in the present embodiment, when it is determined that the size of the measurement object 300 is “small”, the control device 100 causes the light receiving unit 35 to detect the light receiving position for “small” (in FIG. 10). The moving mechanism 40 is operated so as to move to the alternate long and two short dashes line).

Here, the light receiving position for “small” (see the two-dot chain line in FIG. 10) is the seed of the second measurement object 300 (2) within the visual field range 35V of the light receiving unit 35 (see the two-dot chain line in FIG. 10). The light receiving unit 35 is set to a position where it can receive as much transmitted light as possible from the second measurement object 300 (2).
In the present embodiment, as shown in FIG. 10, the “small” light receiving position moves by L in a direction away from the measurement object 300 in the transport width direction as compared to the “large” light receiving position. It is assumed that the position.

  Thus, according to the internal quality determination system 2A according to the present embodiment, the light receiving unit 35 is moved in a predetermined direction (in the transport width direction along the light projecting optical axis in the present embodiment). With this extremely simple configuration, the light receiving unit 35 can receive as much transmitted light as possible with respect to the measurement object 300 of various sizes, and the inside of the measurement object 300 of various sizes can be obtained. Quality accuracy can be improved.

Note that the predetermined direction, which is the moving direction of the light receiving unit 35, may be the light receiving optical axis direction of the light receiving shaft 35 instead of the transport width direction.
11 and 12 are schematic cross-sectional views in the internal quality detection region 10C in the internal quality determination system 2B according to the first modification example in which the light receiving unit 35 is movable in the light receiving optical axis direction.

  FIG. 11 shows a state in which the first measuring object 300 (1) having the size “large” is positioned in the internal quality detection region 10C, and the light receiving unit 35 is positioned in the “large” light receiving position accordingly. The visual field range 35V is indicated by a broken line.

  On the other hand, FIG. 12 shows a state in which the second measurement object 300 (2) having the size “small” is positioned in the internal quality detection region 10C, and the light receiving unit 35 is positioned at the “large” light receiving position. The state of being positioned is indicated by a solid line and the visual field range 35V at that time is indicated by a broken line, and the state where the light receiving unit 35 is positioned at the “small” light receiving position and the visual field range 35V at that time is indicated by a two-dot chain line. ing.

  In the first modification 2B, the “small” light receiving position is a position moved by L in the direction away from the measuring object 300 along the light receiving optical axis as compared with the “large” light receiving position. ing.

  Also in the first modification 2B, the same effect as in the present embodiment can be obtained.

Further, the predetermined direction, which is the moving direction of the light receiving unit 35, can be changed to the transport direction instead of the transport width direction and the light receiving optical axis direction.
13 and 14 are schematic cross-sectional views in the internal quality detection region 10C in the internal quality determination system 2C according to the second modification example in which the light receiving unit 35 is movable in the transport direction.

  FIG. 13 shows a state in which the first measurement object 300 (1) having the size “large” is positioned in the internal quality detection region 10C, and the light receiving unit 35 is positioned at the light reception position for “large” accordingly. The visual field range 35V is indicated by a broken line.

  On the other hand, FIG. 14 shows a state in which the second measurement object 300 (2) having the size “small” is positioned in the internal quality detection region 10C, and the light receiving unit 35 is set to the “large” light receiving position. The state of being positioned is indicated by a solid line and the visual field range 35V at that time is indicated by a broken line, and the state where the light receiving unit 35V is positioned at the “small” light receiving position and the visual field range 35V is indicated by a two-dot chain line. ing.

  In the second modification 2C, the “small” light receiving position of the first light receiving unit 35 (1) is a position moved by L toward the downstream side in the transport direction compared to the “large” light receiving position. The “small” light receiving position of the second light receiving unit 35 (2) is a position moved by L to the upstream side in the transport direction as compared with the “large” light receiving position.

  In the second modification 2C, the same effect as in the present embodiment can be obtained.

  Preferably, as shown in FIGS. 8 to 14, the transport unit 10 has an opening 82 that allows measurement light from the light projecting unit to be projected onto a measurement object, and A shielding plate 80 for preventing measurement light from the light projecting unit 31 from directly entering the light receiving unit 35 can be provided.

  By providing the shielding plate 80, the ratio of the amount of transmitted light in the light received by the light receiving unit 35 can be increased, and the influence of disturbance light can be prevented as much as possible.

More preferably, the shielding plate 80 is disposed so as to be in contact with the outer surface of the largest measurement object 300 among the assumed measurement objects 300.
By providing such a configuration, it is possible to suppress as much as possible the amount of light reflected from the light projecting unit 31 without passing through the measurement object 300 out of the light passing through the opening 82 of the shielding plate 80. it can.

  In each of the above embodiments, the front end of an optical fiber whose rear end is optically connected to the spectroscopic device 70 is used as the light receiving unit. However, the present invention is not limited to such a form. A hyperspectral camera or a multispectral camera can be used as the light receiving unit. In this case, the spectroscopic device 70 is omitted.

DESCRIPTION OF SYMBOLS 10 Conveyance part 10B Size detection area 10C Internal quality detection area 20 Tray 22 Opening 30 Internal quality detection part 31 Light projection part 35 (1) First light reception part 35 (2) Second light reception part 35X Light reception optical axis 35V Field of view range 40 (1) First moving mechanism 40 (2) Second moving mechanism 80 Shield plate 82 Opening 100 Control device

Claims (7)

A size detection region and a conveyance unit that conveys the measurement object so as to pass through the internal quality detection region downstream in the conveyance direction from the size detection region, and size information of the measurement object is detected in the size detection region A size detection unit, an internal quality detection unit that detects internal quality information of a measurement object in the internal quality detection region, and a control device,
The internal quality detection unit includes a light projecting unit fixedly installed so as to project measurement light toward a measurement object located in the internal quality detection region, and the light projecting unit across the measurement object. A light receiving portion that is positioned on the opposite side and receives a transmitted light that has passed through a measurement object in a state where the light receiving optical axis is inclined at a predetermined angle with respect to the light projecting optical axis of the light projecting portion; and A moving mechanism movable in a predetermined direction,
The control device stores light receiving position data in which the light receiving position of the light receiving unit in the predetermined direction is set in accordance with the size of the measurement object, and the control device receives from the size detection unit. The moving mechanism is operated so that the light receiving unit is located at a predetermined light receiving position determined based on size information and the light receiving position data, and an internal detected by the light receiving unit in a state positioned at the predetermined light receiving position An internal quality determination system characterized by determining an internal quality of the one measurement object based on quality information. The transport unit has a plurality of transport trays arranged in series in the transport direction, and the transport tray has a main surface on which an object to be measured can be placed and an opening that allows measurement light to pass. ,
The light projecting unit is arranged so as to project measurement light onto a measurement object from the lower side of the transport unit through the opening.
The light receiving unit is positioned above the measurement object placed on the conveyance tray and displaced from the center of the measurement object in the conveyance width direction to one side in the conveyance width direction, and the light reception optical axis is based on the downward direction. A first light receiving portion inclined to the other side in the transport width direction by the predetermined angle, and the other side in the transport width direction from the center of the transport width direction of the measurement object above the measurement object placed on the transport tray 2. The interior according to claim 1, further comprising: a second light receiving portion that is inclined to the one side in the transport width direction by the predetermined angle with respect to a downward direction at a position displaced toward the side. Quality judgment system. The light projecting unit is arranged to project measurement light to the measurement object from one side in the conveyance width direction,
The light receiving unit is displaced from the measurement object placed on the conveyance tray to the other side in the conveyance width direction and from the center in the conveyance direction of the measurement object to the upstream side in the conveyance direction, and the light reception optical axis is the conveyance width. A first light-receiving portion that is inclined by the predetermined angle to the downstream side in the transport direction with respect to the direction, and a transport direction center of the measurement object on the other side in the transport width direction from the measurement object placed on the transport tray A light receiving optical axis inclined at the predetermined angle with respect to the transport width direction at a position displaced from the transport direction downstream to the transport direction,
The transport unit has an opening that allows the measurement light from the light projecting unit to be projected onto the measurement object, and the measurement light from the light projecting unit receives the first and second light receptions. The internal quality determination system according to claim 1, further comprising a shielding plate that prevents direct entry into the part.   The internal quality determination system according to claim 2, wherein a predetermined direction in which the light receiving unit is moved by the moving mechanism is a vertical direction.   The internal quality determination system according to claim 2 or 3, wherein a predetermined direction in which the light receiving unit is moved by the moving mechanism is a light receiving optical axis direction of the light receiving unit.   The internal quality determination system according to claim 2 or 3, wherein a predetermined direction in which the light receiving unit is moved by the moving mechanism is a conveyance width direction.   The internal quality determination system according to claim 3, wherein a predetermined direction in which the light receiving unit is moved by the moving mechanism is a conveyance direction.

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