JP6410199B1 - Object sorting device - Google Patents

Abstract

An object selection apparatus capable of accurately detecting the occurrence of fungi is provided. A first detector that detects visible light emitted from a first light source and applied to a target object, and a first detector that detects near-infrared light emitted from a second light source and applied to the object. A detection unit having two detection units, a third detection unit for detecting ultraviolet light emitted from the third light source and applied to the target, and the target based on the detection result of the first detection device Whether or not the object is a foreign object based on the detection result of the second detection device, and whether the target is based on the detection result of the third detection device It is determined whether or not bacteria are generated in the body. Based on at least one of the determination results, it is determined whether or not the moving object is a defective product. [Selection] Figure 6

Description

  The present invention relates to an object sorting apparatus that discriminates the quality of grains such as rice.

  A granular material sorting device is known as a device for judging the quality of grains such as rice. The granular material sorting device is a device for sorting granular materials (cereal grains) by detecting foreign matters mixed in grains or the like that are granular bodies, or determining the quality of grains. In this granular material sorting apparatus, light in the infrared region is mainly used for detecting foreign matter, and light in the visible region is mainly used for quality determination.

JP-A-11-51845

  In the state where grains such as rice are stored and the temperature and humidity when the grains are transported are appropriately controlled, fungi such as mold fungi are less likely to occur in the grains, and management of the presence or absence of bacteria is particularly important. There was no need to do so, only foreign matter detection and grain quality were judged.

  However, it is possible to assume the possibility of various changes such as changes in the environment such as global warming and changes in the social situation, and the temperature and humidity may vary depending on the storage environment of grains and the import of grains such as imported rice. It may be necessary to manage grains that are not well managed. For this reason, it is necessary to accurately determine whether or not fungi such as mold fungi are generated in the grain.

  This invention is made | formed in view of the above-mentioned point, The place made into the objective is providing the target object selection apparatus which can detect generation | occurrence | production of fungi accurately.

The features of the object sorting apparatus according to the present invention are as follows:
A first light source unit that emits visible light, a second light source unit that emits infrared light, and a third light source unit that emits ultraviolet light, and visible light and red toward a moving object. Light source means for irradiating at least one of external light and ultraviolet light;
A first detection unit that detects visible light emitted from the first light source unit and applied to the object, and an infrared light that is emitted from the second light source unit and applied to the object are detected. Detection means comprising: a second detection unit; and a third detection unit that detects fluorescence emitted from the object based on ultraviolet light emitted from the third light source unit ;
Based on the detection result of the first detection unit, based on the detection result of the first detection unit and the detection unit of the second detection unit to determine whether or not the transmittance of the object is appropriate, A second suitability determination unit that determines whether or not the target object is a foreign object, and a third suitability determination that determines whether or not bacteria are generated in the target object based on the detection result of the third detection unit. A moving object based on at least one determination result of determination results of the first suitability determination unit, the second suitability determination unit, and the third suitability determination unit. Pass / fail determining means for determining whether or not the product is defective;
A moving direction changing means for changing the moving direction of the object determined to be defective,
Light emission control for selecting at least one light source unit from among the first light source unit, the second light source unit, and the third light source unit, and controlling lighting, extinction, and emission intensity of the selected light source unit. Means.
In addition, the feature of the object selection apparatus according to the present invention is as follows.
A first light source unit that emits visible light, a second light source unit that emits infrared light, and a third light source unit that emits ultraviolet light, and visible light and red toward a moving object. Light source means for irradiating at least one of external light and ultraviolet light;
A first detection unit that detects visible light emitted from the first light source unit and applied to the object, and an infrared light that is emitted from the second light source unit and applied to the object are detected. Detection means comprising: a second detection unit; and a third detection unit that detects fluorescence emitted from the object based on ultraviolet light emitted from the third light source unit;
Based on the first suitability determination unit that determines whether the transmittance or reflectance of the object is appropriate based on the detection result of the first detection unit, and the detection result of the second detection unit A second suitability determination unit that determines whether or not the target object is a foreign object, and a third suitability determination that determines whether or not bacteria are generated in the target object based on a detection result of the third detection unit. A determination unit, and based on at least one determination result of determination results of the first suitability determination unit, the second suitability determination unit, and the third suitability determination unit, the moving object Pass / fail determining means for determining pass / fail;
Moving direction changing means for changing the moving direction of the object determined to be defective, the moving direction changing means,
A fluid discharge device for discharging a fluid toward a moving object;
Timing of fluid discharge from the fluid discharge device according to at least one determination result of the determination result of the first suitability determination unit, the determination result of the second suitability determination unit, and the determination result of the third suitability determination unit A discharge timing determination unit for determining

  Generation of fungi can be accurately detected.

1 is a schematic side view showing an entire target object sorting device 10. FIG. Schematic front view schematically showing the arrangement of the chute 140, the rear RGB light emitting diode 222, the rear ultraviolet light emitting diode 224, the rear infrared light emitting diode 226, the exhaust hole 414, and the irradiation region IR. ), Each of the chute grooves 146 of the chute 140, and each of the exhaust holes 414 is a schematic front view (b) showing that they are arranged in the vertical direction. 2 is a schematic side view showing an outline of a conveyance system 100, an optical system 200, and an air gun drive system 400 of the target object sorting apparatus 10. FIG. 3 is a schematic side view showing an outline of an optical system 200 of the target object sorting apparatus 10. FIG. 4 is a schematic side view showing an outline of an optical path, a passing region PR, and an irradiation region IR in the optical system 200 of the target object sorting apparatus 10. FIG. 3 is a functional block diagram illustrating an outline of functions of a target object sorting device 10. FIG. 5 is a flowchart showing signal processing board determination processing executed in the signal processing board 310. 5 is a flowchart showing signal processing board determination processing executed in the signal processing board 310. 5 is a flowchart showing image processing board determination processing executed in the image processing board 320. 5 is a flowchart showing image processing board determination processing executed in the image processing board 320. 5 is a flowchart showing a valve opening / closing control process executed in an air gun control board 330. It is the schematic which shows the moving direction of the grain GR which left | separated from the chute | shoot 140. FIG. It is the schematic which shows the moving direction of the grain GR which left | separated from the chute | shoot 140. FIG. It is the schematic which shows the moving direction of the grain GR which left | separated from the chute | shoot 140. FIG. 4 is a timing chart showing the relationship between “rising part” and “falling part” of a pulse of an NG signal and “timekeeping start timing”, “waiting time”, and “valve opening time”.

<<<<< Overview of the present embodiment >>>>
<< First Embodiment >>
According to the first embodiment,
A first light source unit that emits visible light (for example, a front-side RGB light-emitting diode 212 or a rear-side RGB light-emitting diode 222 described later) and a second light source unit that emits infrared light (for example, a front-side infrared light-emitting diode described later) 216 and rear infrared light emitting diode 226) and a third light source that emits ultraviolet light (for example, a front ultraviolet light emitting diode 214 and a rear ultraviolet light emitting diode 224, which will be described later), Light source means (for example, an optical system 200 to be described later) for irradiating at least one kind of visible light, infrared light, and ultraviolet light toward an object (for example, grain such as rice to be described later) ,
A first detection unit (for example, a CIS232 for visible light range described later) that detects visible light emitted from the first light source unit and applied to the object, and the second light source unit that emits the light second detecting unit for detecting the infrared light irradiated to the subject (e.g., near-like infrared region for CIS234 described later) and ultraviolet irradiated to the subject emitted from the third light source unit A detection unit (detection system 230 or the like) having a third detection unit (for example, a front CMOS camera 236 or a rear CMOS camera 238 described later) that detects light;
A first suitability determination unit (for example, a signal processing board 310 described later and the processing of FIG. 7) that determines whether the transmittance of the target object is appropriate based on the detection result of the first detection unit; A second suitability determination unit (for example, a signal processing board 310 described later and the process of FIG. 8) that determines whether or not the object is a foreign object based on the detection result of the second detection unit; A third suitability determination unit that determines whether or not bacteria are generated in the target object based on the detection result of the third detection unit (for example, the image processing board 320 described later and the processes of FIGS. 9 and 10). And the moving object is a defective product based on at least one determination result among the determination results of the first suitability determination unit, the second suitability determination unit, and the third suitability determination unit. Pass / fail determination means for determining whether or not That such signal processing board 310 and the image processing board 320) and,
There is provided a target object sorting device including movement direction changing means (for example, an air gun drive system 400 described later) that changes the movement direction of the target object determined to be defective.

  As described above, the target object sorting apparatus includes the light source means, the detection means, the pass / fail determination means, and the movement direction change means.

  The light source means includes a first light source unit, a second light source unit, and a third light source unit. The first light source unit emits visible light. The second light source unit emits infrared light. The third light source unit emits ultraviolet light.

  The detection means includes a first detection unit, a second detection unit, and a third detection unit. The first detection unit detects visible light applied to the object. Specifically, the first detection unit irradiates the object and transmits the visible light (visible light transmission component (visible transmitted light)) or the visible light reflected by the object (visible light). The reflection component (visible reflected light) is detected. Only visible transmission light, only visible reflection light, or both visible transmission light and visible reflection light may be detected. What is necessary is just to be able to judge pass / fail accurately according to the type of the object, the type of defect occurring in the object, and the like.

  The second detection unit detects infrared light applied to the object. Specifically, the second detection unit is configured to transmit infrared light (a transmission component of infrared light (infrared transmitted light)) that is irradiated on the target object and transmitted through the target object, or infrared light reflected by the target object. (Reflection component of infrared light (infrared reflected light)) is detected. Only infrared transmitted light, only infrared reflected light, or both infrared transmitted light and infrared reflected light may be detected. What is necessary is just to be able to judge pass / fail accurately according to the type of the object, the type of defect occurring in the object, and the like. Infrared light includes near-infrared light, mid-infrared light, far-infrared light, and the like, and any infrared light that can accurately determine the quality of an object is acceptable.

  The third detection unit detects fluorescence emitted from the object. Specifically, when the object is irradiated with ultraviolet light emitted from the third light source unit and bacteria are generated on the object, fluorescence is emitted from the bacteria according to the irradiated ultraviolet light. The third detection unit detects fluorescence emitted from the bacteria. Ultraviolet light includes deep ultraviolet light, A wave (UVA), B wave (UVB), C wave (UVC), and the like, and any ultraviolet light that can accurately determine the occurrence of bacteria is required.

  The pass / fail determination means includes a first suitability determination unit, a second suitability determination unit, and a third suitability determination unit. The first suitability determination unit determines whether the transmittance and reflectance of the target object are appropriate based on the detection result of the first detection device. Specifically, the first suitability determining unit reflects the object obtained from the transmittance of the object obtained from the visible light transmission component (visible transmission light) or the reflection component of the visible light (visible reflection light). Determine if the rate is appropriate.

  The second suitability determination unit determines whether the target object is a foreign object based on the detection result of the second detection device. Specifically, the first suitability determination unit is obtained from the transmittance of the object obtained from the infrared light transmission component (infrared transmission light) or the infrared light reflection component (infrared reflection light)). It is determined whether or not the reflectance of the object is appropriate.

  The third suitability determination unit determines whether or not bacteria are generated in the target based on the detection result of the third detection device. Furthermore, the quality determination means determines whether the moving object is a defective product based on at least one determination result among the determination results of the first suitability determination unit, the second suitability determination unit, and the third suitability determination unit. Decide whether or not. In particular, by using at least the determination result of the third suitability determination unit, it is possible to determine whether or not a fungus such as mold fungus has occurred in the object.

  Whether or not the product is defective from all three determination results of the first suitability determination unit, the second suitability determination unit, and the third suitability determination unit, depending on the type of the target object and the type of defect occurring in the target object. May be determined, and it may be determined whether or not it is a defective product from any two determination results, or it may be determined whether or not it is a defective product from only one determination result. .

  The moving direction changing means changes the moving direction of the object determined to be defective.

  According to the object selection apparatus according to the first embodiment, in addition to the determination of discoloration, foreign matter, etc., it can also be determined whether or not fungi such as fungi are generated in the object.

  The object selection apparatus according to the first embodiment includes a first detection unit and a first suitability determination unit, a second detection unit and a second suitability determination unit, a third detection unit and a third suitability determination unit. The three types of detection units and the suitability determination unit can determine whether the target object is good or bad. That is, the determination by the first detection unit and the first suitability determination unit, the determination by the second detection unit and the second suitability determination unit, and the determination by the third detection unit and the third suitability determination unit are one target. The body sorting device can be integrated and integrated. For this reason, it is possible to reduce or prevent the object from being damaged, contaminated or shocked by the movement of the object.

  On the other hand, for example, an object selection device having only a first detection unit and a first suitability determination unit, an object selection device having only a second detection unit and a second suitability determination unit, a third detection unit, and When determining an object using an object selection device having only the third suitability determination unit, it is necessary to move the object with each of the three devices, and the object is damaged each time it is moved. There is a possibility of causing contamination, impact and impact. However, as described above, when the target object sorting apparatus according to the first embodiment is used, it is possible to determine the quality of the target object by only one movement, and it is difficult to damage the target object. It is possible to make it easier to maintain the state of the object.

  In the first embodiment, it is preferable to further include a movement adjustment unit (for example, a conveyance system 100 described later) that adjusts the movement speed, movement direction, and movement posture of the object. At the time of detection, the object can be brought into a state suitable for detection, and the object can be selected with stable determination.

  The first detection unit, the first suitability determination unit, the second detection unit, the second suitability determination unit, the third detection unit, and the third suitability determination unit described above detect optical characteristics that are different from each other, thereby detecting the optical characteristics. The suitability of the object is determined in accordance with the characteristics. The optical characteristics include reflection, transmission, absorption, and the like. However, the optical characteristics are not limited to these, and any optical characteristics may be used as long as the suitability of the object can be determined based on characteristics obtained by illuminating the object with various types of light. .

  Further, in the configuration described above, the three types of detection units and propriety of the first detection unit and the first suitability determination unit, the second detection unit and the second suitability determination unit, the third detection unit and the third suitability determination unit are included. Although the example which has a determination part was shown, according to the kind of target object, the kind of malfunction which arises in a target object, etc., a 1st detection part, a 1st suitability determination part, a 2nd detection part, and a 2nd suitability determination A configuration having only the second detection unit, a configuration having only the second detection unit and the second suitability determination unit, the third detection unit and the third suitability determination unit, and the first detection unit and the first suitability determination unit. It can be set as the structure which has only a 3rd detection part and a 3rd suitability determination part. It is possible to provide an object selection apparatus specialized in the type of object and the types of defects that occur in the object.

<< Second Embodiment >>
The second embodiment is the same as the first embodiment.
Light emission control for selecting at least one light source unit from among the first light source unit, the second light source unit, and the third light source unit, and controlling lighting, extinction, and emission intensity of the selected light source unit. It is comprised so that a means (for example, the light source control apparatus 340 mentioned later etc.) may be further provided.

  Select the first light source unit, the second light source unit, and the third light source unit, or turn on / off and control the emission intensity, depending on the type and properties of the target object, the type of defect, etc. Appropriate light can be illuminated on the object, and it can be determined whether or not the object is defective.

<< Third Embodiment >>
The third embodiment is the same as the second embodiment,
The first light source unit is a white light source composed of light sources of a plurality of colors that can independently control light emission,
The light emission control unit is configured to independently control lighting, extinction, and light emission intensity of the light sources of the plurality of colors.

  For visible light, it is possible to further control the lighting, extinction, and emission intensity, so that it is possible to illuminate the object with light of an appropriate color according to the type, properties, and type of failure of the target object. It can be determined whether or not it is defective.

<< Fourth Embodiment >>
The fourth embodiment is the same as the third embodiment,
The plurality of colors are configured to be red, blue, and green. It is possible to illuminate the object by freely emitting light of a desired color.

<< Fifth Embodiment >>
The fifth embodiment is the same as the third embodiment,
The third detection unit detects visible light emitted from the first light source unit and applied to the object,
The pass / fail determination means is a fourth suitability determination unit (for example, described later) that determines whether the reflectance or transmittance of the object is appropriate based on the detection result of visible light by the third detection unit. The image processing board 320 and the processes of FIGS. 9 and 10).

  When the first suitability determination unit described above determines whether the transmittance of the object obtained from the visible light transmission component (visible transmitted light) by the first detection device is appropriate, the fourth suitability is determined. The determination unit preferably determines whether or not the reflectance of the target obtained from the reflected component of visible light (visible reflected light) by the third detection device is appropriate. On the contrary, when the first suitability determination unit described above determines whether or not the reflectance of the target obtained from the visible light reflection component (visible reflected light) by the first detection device is appropriate. Alternatively, the fourth suitability determining unit may determine whether or not the transmittance of the target obtained from the visible light transmission component (visible transmitted light) by the third detection device is appropriate. As described above, since the first suitability determination unit and the fourth suitability determination unit determine the visible light, not only either the transmittance or the reflectance but also the transmittance and the reflectance are determined. Therefore, the type of failure can be determined more accurately.

  In the fifth embodiment, in addition to the first detection unit and the first suitability determination unit, the second detection unit and the second suitability determination unit, the third detection unit and the third suitability determination unit described above, The suitability of the target object is also determined by the third detection unit and the fourth suitability determination unit. As described above, the third detection unit detects both the fluorescent light and the visible light, and the fourth suitability determination unit, based on the detection result when the visible light is used, It is determined whether or not the transmittance is appropriate. The first detection unit and the first suitability determination unit, the second detection unit and the second suitability determination unit, the third detection unit and the third suitability determination unit, the third detection unit and the fourth suitability determination unit, By detecting different optical characteristics, the suitability of the object is determined according to the optical characteristics. As described above, the optical characteristics include reflection, transmission, absorption, etc., but are not limited to these, and the suitability of the object can be determined by the characteristics obtained by illuminating the object with various types of light. I just need it.

  In the above-described configuration, the first detection unit and the first suitability determination unit, the second detection unit and the second suitability determination unit, the third detection unit and the third suitability determination unit, the third detection unit, and the second detection unit Although the example which has 4 types of detection parts and the suitability determination part of 4 suitability determination part was shown, the combination used for determination is changed suitably according to the kind of target object, the kind of malfunction which arises in a target object, etc. be able to. Specifically, a configuration having only the first detection unit, the first suitability determination unit, the second detection unit, and the second suitability determination unit, the first detection unit, the first suitability determination unit, and the third A configuration having only the detection unit and the third suitability determination unit, a configuration having only the first detection unit and the first suitability determination unit, the third detection unit, and the fourth suitability determination unit, and the second detection unit And only the structure which has only a 2nd suitability determination part, a 3rd detection part, and a 3rd suitability determination part, a 2nd detection part, a 2nd suitability determination part, a 3rd detection part, and a 4th suitability determination part A configuration having only the third detection unit, the third suitability determination unit, the third detection unit, and the fourth suitability determination unit, the first detection unit, the first suitability determination unit, and the second A configuration having only the detection unit, the second suitability determination unit, the third detection unit, and the third suitability determination unit, the first detection unit, the first suitability determination unit, and the first The configuration having only the detection unit, the second suitability determination unit, the third detection unit, and the fourth suitability determination unit, the second detection unit, the second suitability determination unit, the third detection unit, and the third suitability determination And a third detection unit and a fourth suitability determination unit. It is possible to provide an object selection apparatus specialized in the type of object and the types of defects that occur in the object.

<< Sixth Embodiment >>
A sixth embodiment is the same as the fifth embodiment,
The moving direction changing means is
A fluid discharge device (for example, an air gun 410 described later) that discharges fluid toward a moving object;
According to at least one determination result of the determination result of the first suitability determination unit, the determination result of the second suitability determination unit, the determination result of the third suitability determination unit, and the determination result of the fourth suitability determination unit, A discharge timing determination unit (for example, an air gun control board 330 described later) that determines the timing of discharging the fluid from the fluid discharge device.

  The timing of fluid discharge can be determined according to the type of defect, so it is possible to prevent the defective target from being accurately excluded or not properly accepting the defective target. Only the target object can be accurately excluded and selected.

  The fluid discharge timing includes, for example, timing for starting fluid discharge, timing for ending fluid discharge, and timing for starting timing. It is also possible to change the flow rate of the fluid to be discharged. The flow rate of the fluid to be discharged can be switched from a large amount to a small amount, or can be switched from a small amount to a large amount. Moreover, the timing which changes discharge intensity | strength may be sufficient. What is necessary is just to be able to change the moving direction of the target object accurately by the fluid to be discharged. These timings can be determined according to the determination result of the first suitability determination unit to the determination result of the fourth suitability determination unit. Specifically, the timing can be changed according to the mass of the object corresponding to the determination result. For example, when the object is light, the moving speed becomes slow, so the timing is delayed, and when the object is heavy, the moving speed becomes fast, so that the timing can be advanced.

  For example, air is used as the fluid. However, the fluid is not limited to air as long as the moving direction of the object can be changed, and other fluids such as water may be used.

<<<<< Details of this embodiment >>>>
Embodiments will be described below with reference to the drawings. In the following, the term “cereals” refers to the seeds of gramineous crops, the seeds of leguminous crops, and the seeds of crops of other families, and the term “cereal” focuses on the grain-like form of the grains.

<<<<< Configuration of Object Sorting Device 10 >>>>
The target object sorting apparatus 10 mainly includes a transport system 100 (movement adjustment unit), an optical system 200, a control processing system 300, and an air gun drive system 400. The transport system 100 is moved to sort grains such as rice that are objects of sorting. The optical system 200 irradiates the grain with light in order to select whether the grain is good or defective, and detects transmitted light, reflected light, fluorescence, and the like generated by the irradiated light. The control processing system 300 detects various kinds of light generated by the irradiated light and determines the quality of the grain. The air gun drive system 400 drives an air gun for removing grains determined to be defective according to the determination result of the control processing system 300. Hereinafter, the transport system 100 (movement adjustment unit), the optical system 200, the control processing system 300, and the air gun drive system 400 will be described in detail.

<<< Structure of Conveyance System 100 (Movement Adjustment Unit) >>>
FIG. 1 is a schematic side view showing the entire object sorting apparatus 10. FIG. 2 is a schematic front view showing the entire object sorting apparatus 10. FIG. 3 is a schematic side view of the outline of the transport system 100 and the optical system 200 of the target object sorting apparatus 10. FIG. 4 is a schematic side view of the outline of the optical system 200 of the target object sorting apparatus 10. FIG. 5 is a schematic side view showing an outline of an optical path in the optical system 200 of the object sorting apparatus 10. FIG. 6 is a functional block diagram illustrating an outline of functions of the target object sorting apparatus 10.

  2A, the positional relationship among the chute 140, the rear RGB light emitting diode 222, the rear ultraviolet light emitting diode 224, the rear infrared light emitting diode 226, the exhaust hole 414, and the irradiation region IR is clearly shown. For the sake of illustration, they are shown at positions separated from each other. These specific arrangements are shown in FIG. 3, FIG. 4 and FIG. The chute 140 has a long shape, but in FIG. 2A, the chute 140 is shown with the middle omitted. In FIG. 2B, in order to clearly show the correspondence between the chute 140 and the exhaust hole 414, only a part of the chute 140 and the exhaust hole 414 is shown enlarged. In FIG. 5, the front CMOS camera 236 and the rear CMOS camera 238 are shown at positions close to the irradiation region IR in order to clearly show the optical path.

  As shown in FIGS. 1 and 3, the transport system 100 mainly includes a tank 120, a feeder 130, and a chute 140.

<Tank 120>
The tank 120 is a container for storing grains such as rice, which is an object to be selected. The tank 120 is disposed on the upper part of the target object sorting apparatus 10. A through hole (not shown) is formed at the bottom of the tank 120. Grains stored in the tank 120 are moved below the tank 120 by the action of gravity, fall from the tank 120 through the through hole at the bottom, and are guided to the feeder 130.

<Feeder 130>
The feeder 130 has an upper end portion 132 and a lower end portion 134, and the through hole of the tank 120 is located above the feeder 130 near the upper end portion 132. Grain dropped from the through hole of the tank 120 is guided near the upper end 132 of the feeder 130. The feeder 130 is inclined downward toward the chute 140 and can be vibrated by an electric motor (not shown). As the feeder 130 vibrates, the grains falling near the upper end 132 of the feeder 130 gradually move toward the lower end 134 of the feeder 130 and are guided to the chute 140 from the lower end 134.

<Shoot 140>
The chute 140 has an upper end 142 and a lower end 144, and the grains that have moved on the feeder 130 due to the vibration of the feeder 130 fall near the upper end 142 of the chute 140.

  The chute 140 is provided with a plurality of long and parallel, for example, 60 chute grooves 146 (see FIG. 2). The cross-sectional shape of the chute groove 146 in the short direction (lateral direction in FIG. 2) is substantially U-shaped, and has a shape adapted to the outer shape of the grain. Each of the chute grooves 146 has a width that is slightly larger than the width of a grain such as rice. When the grain has a long shape such as a substantially long sphere (ellipsoid), the width of the grain means the length of the grain in the short direction. When the grain has a substantially spherical shape, the width of the grain means the length of the diameter of the grain. The chute groove 146 has a smooth surface, and the grain guided by the chute groove 146 can move while sliding smoothly in the chute groove 146.

  The plurality of grains dropped near the upper end 142 of the chute 140 are separately guided into the chute groove 146 while changing their posture while being gradually separated. Grain introduced into the chute groove 146 is guided by the chute groove 146 having a substantially U-shaped cross section, and moves along the chute groove 146. The chute groove 146 serves as a grain guide path, and the grain guided to each of the chute grooves 146 can smoothly move along the longitudinal direction of the chute groove 146. The chute 140 is installed so as to form a predetermined angle (an angle greater than 0 degree and 90 degrees or less), for example, about 70 degrees with respect to the horizontal direction, and the grain guided to the chute groove 146 is separated by gravity. As a result of this action, it moves downward toward the lower end 144 of the chute 140 while being guided by the chute groove 146.

  Grain that has moved downward along the chute groove 146 reaches the lower end 144 of the chute 140 and then leaves the chute 140 and falls freely (hereinafter simply referred to as “fall”). In addition, as shown in FIG.4 and FIG.5, the grain which detach | leaved from the chute | shoot 140 falls along the passage area | region PR.

  The angle of the chute 140 with respect to the horizontal direction can be determined as appropriate according to the type and size of the grain, the speed of dropping, and the like. By adjusting the angle of the chute 140 with respect to the horizontal direction, the speed at which the chute 140 drops from the lower end 144 of the chute 140 can be set to a desired speed. By setting the speed at which the grain falls to a speed suitable for detection, the accuracy of quality detection can be increased.

<Operation panel 160>
As shown in FIGS. 1 and 3, an operation panel 160 is provided on the front surface of the object sorting apparatus 10. The operation panel 160 has a liquid crystal display and a touch panel. Various types of information for controlling the object sorting apparatus 10 are displayed on the liquid crystal display, and the operator visually recognizes the displayed information and operates the object sorting apparatus 10 by operating the touch panel.

  In addition, the liquid crystal display of the operation panel 160 displays in real time the results (photographing results) received by the CIS 232 for visible light region, the CIS 234 for near infrared light region, the front CMOS camera 236, and the rear CMOS camera 238, which will be described later. can do. The operator can determine whether light reception (photographing) is appropriately performed.

<<< Optical System 200 >>>
<< Light type, detection target, and determination contents >>
As described above, in this embodiment, the quality of a good or defective grain is determined using three types of light, visible light, near infrared light, and deep ultraviolet light. For example, it is determined whether or not grains such as rice are in a light color state such as white turbidity using the transmittance with which visible light passes through the grains. Using the reflectance at which visible light is reflected by the grain, it is determined whether or not the grain such as rice is in a dark color state such as black. The presence or absence of moisture is detected by irradiating near infrared light, and it is determined whether or not it is a foreign matter such as plastic. By irradiating deep ultraviolet light, the occurrence of fluorescence is detected and the occurrence of fungi such as mold is determined.

<< Configuration of Optical System 200 >>
As shown in FIGS. 1, 3, 4, 5, 12, 13, and 14, the optical system 200 is arranged so as to sandwich the grains that fall off the chute 140. As shown in FIG. 6, the optical system 200 includes a front light source system 210, a rear light source system 220, and a detection system 230. In addition, the front side in the target object sorting apparatus 10 refers to a side on which an operation panel 160 (see FIGS. 1 and 3) for operation by an operator is installed, and the rear side is a side opposite to the front side. Yes, the depth side. The front light source system 210 and the rear light source system 220 are arranged on the front side and the rear side across the falling grain.

<< Front Light Source System 210 and Rear Light Source System 220 >>
The front light source system 210 includes a front RGB light emitting diode 212, a front ultraviolet light emitting diode 214, and a front infrared light emitting diode 216. The rear light source system 220 includes a rear RGB light emitting diode 222, a rear ultraviolet light emitting diode 224, and a rear infrared light emitting diode 226. Both of the diodes constituting the front light source system 210 and the rear light source system 220 emit light toward the irradiation region IR (see FIGS. 4 and 5) in the passing region PR, and the grains are incident on the irradiation region IR. When positioned, light from the diodes constituting the front light source system 210 and the rear light source system 220 is irradiated. Note that the passing region PR is a region through which the grains separated from the chute 140 fall and pass (see FIGS. 4 and 5), and the irradiation region IR is a partial region included in the passing region PR ( 4 and FIG. 5), an area irradiated with various light emitted from the diodes of the front light source system 210 and the rear light source system 220 (see FIG. 2, FIG. 4 and FIG. 5).

<Front RGB Light Emitting Diode 212 and Rear RGB Light Emitting Diode 222>
The front-side RGB light-emitting diode 212 and the rear-side RGB light-emitting diode 222 are composed of three types of light-emitting diodes: a red light-emitting diode, a green light-emitting diode, and a blue light-emitting diode. Specifically, as shown in FIG. 2, a plurality of, for example, 75 red light emitting diodes are arranged in a row (referred to as a red light emitting diode row), and a plurality of, for example, 75 green light emitting diodes are arranged in a row. A plurality of, for example, 75 blue light emitting diodes are arranged in a row (referred to as a blue light emitting diode row), a red light emitting diode row, a green light emitting diode row, and a blue light emitting diode. The columns are arranged so as to be parallel to each other (see FIG. 2).

  2A schematically shows a positional relationship among the chute 140, the rear RGB light emitting diode 222, the rear ultraviolet light emitting diode 224, the rear infrared light emitting diode 226, the exhaust hole 414, and the irradiation region IR. FIG. FIG. 2B is a schematic front view showing that each of the chute grooves 146 of the chute 140 and each of the exhaust holes 414 are arranged correspondingly in the vertical direction.

  A light source control device 340, which will be described later, controls the lighting and extinguishing states of the front RGB light emitting diode 212 and the rear RGB light emitting diode 222. That is, it is possible to emit red light by operating the red light emitting diodes constituting the red light emitting diode row, and emit green light by operating the green light emitting diodes constituting the green light emitting diode row, Blue light can be emitted by operating the blue light emitting diodes constituting the blue light emitting diode array. Further, when all of the red light emitting diode row, the green light emitting diode row, and the blue light emitting diode row are operated with the same light emission intensity, white light is emitted.

  Furthermore, the light source control device 340 can separately control the light emission intensities of the red light emitting diode row, the green light emitting diode row, and the blue light emitting diode row. This includes the case where no red light emitting diode array emits light (zero light emission intensity), the case where no green light emitting diode array emits light (zero light emission intensity), and the case where no blue light emitting diode array emits light (no light emission intensity). By adjusting the light emission intensity of the red light emitting diode array, the light emission intensity of the green light emitting diode array, and the light emission intensity of the blue light emitting diode array, it is possible to illuminate the falling grain with a desired combination of light emission intensity. By deciding the combination of red, green and blue emission intensities according to the type of grain and the type of malfunction (foreign matter contamination, deterioration, generation of bacteria, etc.) that occurs in the grain, Good or bad can be judged accurately.

<Front Infrared Light Emitting Diode 216 and Rear Infrared Light Emitting Diode 226>
The front infrared light emitting diode 216 and the rear infrared light emitting diode 226 are diodes that emit infrared light. Infrared light mainly consists of three types of near-infrared light, mid-infrared light, and far-infrared light. In the present embodiment, it is preferable to employ near infrared light. Near-infrared light is an electromagnetic wave of 780 to 3,000 nm. By using near-infrared light, it is possible to accurately detect foreign matters such as plastic mixed in the grain. In addition, if it can discover the foreign material mixed in the grain, it will not be limited to near infrared light, but infrared light can be widely used.

<Front UV Light Emitting Diode 214 and Rear UV Light Emitting Diode 224>
The front ultraviolet light emitting diode 214 and the rear ultraviolet light emitting diode 224 are diodes that emit ultraviolet light. For example, a light emitting diode that emits ultraviolet light having a wavelength of 400 nm or less. In particular, in the present embodiment, it is preferable to employ deep ultraviolet light. The wavelength range of deep ultraviolet light refers to ultraviolet light of approximately 250 nm, 300 nm, and 350 nm or less. When fungi such as mold fungi are generated on the surface of the grain, the germs emit fluorescence by irradiating the grain with ultraviolet light in the wavelength range of deep ultraviolet light. When fluorescence is detected, it can be determined that fungi such as fungi are generated in the grain. In addition, if the microbe which arises in a grain can be detected, it will not be restricted to deep ultraviolet light, but ultraviolet light can be widely used.

  When mold fungus grows, it may be confirmed with the naked eye, but it is difficult to check with the naked eye at the stage of mold fungus itself or before it grows sufficiently. If the cereal is contaminated with mold, it is difficult to remove the mold from the cereal, so it is necessary to accurately remove the cereal contaminated with mold. In general, it has been found that most of the fungi that occur in cereals have a fluorescent substance, and when the fungus is irradiated with deep ultraviolet light, it emits fluorescence. For example, it is known that fluorescence is emitted in any wavelength region of 400 nm to 520 nm when irradiated with 310 nm deep ultraviolet light in the state where fungi such as mold fungi are generated on the surface of the grain.

<< Detection System 230 >>
The detection system 230 includes a visible light region CIS 232, a near infrared light region CIS 234, a front CMOS camera 236, and a rear CMOS camera 238.

<CIS232 for visible light region and CIS234 for near infrared light region>
The visible light region CIS 232 and the near-infrared light region CIS 234 are each composed of a contact image sensor. In the present embodiment, the visible light region CIS 232 and the near-infrared light region CIS 234 use contact image sensors having the same characteristics (sensitivity, frequency characteristics, etc.) with respect to light. By placing an infrared cut filter in front of the CIS 232 (not shown), a contact image sensor for the visible light region is provided, and a visible light cut filter is placed in front of the CIS 234 for the near infrared light region. (Not shown), a contact image sensor for near infrared light region. In addition, without using an infrared cut filter or a visible light cut filter, a contact image sensor having characteristics corresponding to the visible light region and a contact image sensor having characteristics corresponding to the near infrared light region are separately selected. May be used.

  In the present embodiment, the visible light region CIS 232 is disposed on the front side of the target object sorting apparatus 10, and the near-infrared light region CIS 234 is disposed on the rear side of the target object sorting apparatus 10. Note that the visible light region sensor and the near infrared light region sensor are not limited to such an arrangement, and may be appropriately arranged according to the type of grain, the type of defect related to the grain, and the like.

<CIS232 for visible light region>
The visible light region CIS 232 is a sensor for detecting visible light transmitted through the grain. The visible light region CIS 232 detects visible light emitted from the front RGB light emitting diode 212 and the rear RGB light emitting diode 222 and transmitted through the grain.

  The visible light emitted from the front RGB light emitting diode 212 first passes through the grain, and is then irradiated to the background body 242, reflected by the background body 242, and headed toward the visible light region CIS 232. The visible light region CIS 232 receives the visible light reflected by the background body 242. The visible light reflected by the background body 242 includes light that has passed through the grain, and the transmittance of the grain can be obtained.

  Further, the visible light emitted from the rear RGB light emitting diode 222 passes through the grain and then travels toward the visible light region CIS 232. The visible light region CIS 232 transmits visible light directly transmitted to the visible light region CIS 232 through the grain.

  As described above, the visible light region CIS 232 is emitted from the front RGB light emitting diode 212, is reflected from the background body 242 and is emitted from the rear RGB light emitting diode 222 to the optical path VF toward the visible light region CIS 232, and the grain. And visible light in two optical paths, the optical path VR toward the CIS 232 for visible light region.

<Background body 242 for CIS232 for visible light region>
The background body 242 is an object serving as a reference for the illuminance of visible light, and is disposed at a position where the visible light emitted from the front RGB light emitting diode 212 is illuminated. The background body 242 is configured by, for example, a white planar body.

<Shielding plate 252 for CIS232 for visible light region>
Further, a shielding plate 252 is provided in front of the CIS 232 for visible light region. The visible light emitted from the front-side RGB light emitting diode 212 may be reflected by the grain and may enter the visible light region CIS 232. The shielding plate 252 is a member for preventing the reflected light from entering, and is a member for blocking a part of light that can be received by the visible light region CIS 232.

<Detection by CIS232 for visible light region>
The visible light region CIS 232 is emitted from the front RGB light emitting diode 212 and the rear RGB light emitting diode 222 when the grain dropped from the chute 140 passes through the irradiation region IR, that is, when the grain exists in the irradiation region IR. The visible light that passes through the grain is detected. When the grain is not present in the irradiation region IR, the visible light region CIS 232 directly receives the visible light emitted from the front RGB light emitting diode 212 and the rear RGB light emitting diode 222.

  Therefore, the received light intensity of the visible light region CIS 232 differs between when the grain exists in the irradiation region IR and when no grain exists in the irradiation region IR. For example, when a grain such as good quality rice that is nearly transparent passes through the irradiation region IR, the transmittance does not change so much and the received light intensity does not change so much. On the other hand, when a grain such as defective white rice that has become cloudy passes, the transmittance changes greatly, and the received light intensity also changes greatly.

  In this way, by receiving visible light with the visible light region CIS 232, it is possible to determine whether the grain is in a light color state such as cloudiness. Note that when visible light transmitted through the light-colored grain is received, a black image is generated as an image of the light-colored grain. That is, it can be determined whether or not the grain is in a light color state depending on whether or not a black image exists.

<CIS234 for near infrared region>
The near infrared light region CIS 234 is a sensor for detecting near infrared light transmitted through the grain. The near infrared light region CIS 234 detects near infrared light emitted from the front infrared light emitting diode 216 and the rear infrared light emitting diode 226 and transmitted through the grain.

  Near-infrared light emitted from the front-side infrared light emitting diode 216 passes through the grain and then travels to the near-infrared light region CIS 234. The near-infrared light region CIS 234 passes through the grain and directly receives near-infrared light directed to the near-infrared light region CIS 234.

  Further, the near infrared light emitted from the rear infrared light emitting diode 226 first passes through the grain, and is then irradiated to the background body 244 and reflected by the background body 244 to be used for the near infrared light region CIS 234. Head for. The near infrared light region CIS 234 receives near infrared light reflected by the background body 244. The near-infrared light reflected by the background body 244 includes light that has passed through the grain, so that the transmittance of the grain can be obtained.

  As described above, the near-infrared light region CIS 234 is emitted from the front infrared light emitting diode 216, passes through the grain, and travels toward the near infrared light region CIS 234, and from the rear infrared light emitting diode 226. It is arranged so as to receive near-infrared light of two optical paths that are emitted and reflected by the background body 244 and directed to the near-infrared light region CIS 234.

<Background body 244 for CIS234 for near infrared light region>
The background body 244 is an object serving as a reference for the illuminance of near-infrared light, and is disposed at a position where the near-infrared light emitted from the rear infrared light-emitting diode 226 is illuminated. The background body 244 is configured by, for example, a white planar body.

<CIS234 shielding plate 254 for near infrared light region>
Further, a shielding plate 254 is provided in front of the CIS 234 for near infrared light region. The near infrared light emitted from the rear infrared light emitting diode 226 may be reflected by the grain and enter the CIS 234 for the near infrared light region. The shielding plate 254 is a member for preventing incidence of the reflected light, and is a member for blocking a part of light that can be received by the near-infrared light region CIS 234.

<Detection by CIS234 for near infrared light range>
The near-infrared light region CIS 234 is a front-side infrared light-emitting diode 216 and a rear-side infrared light-emitting diode when the grain dropped from the chute 140 passes through the irradiation area IR, that is, when the grain exists in the irradiation area IR. Near-infrared light emitted from 226 and transmitted through the grain is detected. When the grain is not present in the irradiation region IR, the near-infrared light region CIS 234 receives the near-infrared light emitted from the front-side infrared light-emitting diode 216 and the rear-side infrared light-emitting diode 226 as it is.

  Therefore, the light reception intensity of the CIS 234 for near-infrared light region differs between when the grain exists in the irradiation region IR and when no grain exists in the irradiation region IR. For example, when a grain such as good quality rice that contains sufficient moisture passes through the irradiation region IR, the transmittance does not change so much and the received light intensity does not change so much. On the other hand, when a foreign substance such as plastic passes through the irradiation region IR, the transmittance changes greatly, and the received light intensity also changes greatly.

  Thus, by receiving near-infrared light with the near-infrared light region CIS 234, for example, it can be determined whether or not a foreign substance such as plastic is mixed. When the near-infrared light region CIS 234 receives near-infrared light that has passed through the foreign matter, a black image or a white image is generated as the foreign matter image depending on the type of the foreign matter. That is, it can be determined whether or not a foreign object is present depending on whether a black image or a white image exists. The type of foreign matter can be determined based on whether the image is a black image or a white image.

<< Front CMOS Camera 236 and Rear CMOS Camera 238 >>
Both the front CMOS camera 236 and the rear CMOS camera 238 are composed of CMOS cameras.

<Front CMOS Camera 236>
When visible light emitted from the front RGB light emitting diodes 212 is applied to the falling grain, it is reflected by the grain. The front CMOS camera 236 receives visible light reflected by the grain. Furthermore, when fungi such as fungi are generated on the cereal when deep ultraviolet light emitted from the front-side ultraviolet light emitting diode 214 is irradiated to the falling cereal, fluorescence is emitted by the fungus on the cereal. It is done. The front CMOS camera 236 receives the fluorescence emitted by the mold.

<Rear CMOS camera 238>
When visible light emitted from the rear RGB light emitting diodes 222 is applied to the falling grain, it is reflected by the grain. The rear CMOS camera 238 receives the visible light reflected by the grain. Further, when deep ultraviolet light emitted from the rear ultraviolet light emitting diode 224 is irradiated to the falling grain, if fungi such as mold fungus are generated on the grain, fluorescence is caused by the mold fungus on the grain. Be emitted. The rear CMOS camera 238 receives the fluorescence emitted by the fungus.

<Detection by front CMOS camera 236 and rear CMOS camera 238>
As described above, the front CMOS camera 236 and the rear CMOS camera 238 receive two types of light: visible light reflected by the grain and fluorescence emitted by mold.

  When the grain dropped from the chute 140 passes through the irradiation area IR, that is, when the grain exists in the irradiation area IR, the visible light emitted from the front RGB light emitting diode 212 is reflected by the grain. The front CMOS camera 236 detects visible light reflected by the grain. Note that when the grain does not exist in the irradiation region IR, the front CMOS camera 236 does not receive visible light emitted from the front RGB light emitting diode 212.

  Similarly, when the grain dropped from the chute 140 passes through the irradiation area IR, that is, when the grain exists in the irradiation area IR, the visible light emitted from the rear RGB light emitting diode 222 is reflected by the grain. . The rear CMOS camera 238 detects visible light reflected by the grain. Note that when the grain is not present in the irradiation region IR, the rear CMOS camera 238 does not receive the visible light emitted from the rear RGB light emitting diode 222.

  For example, the front CMOS camera 236 and the rear CMOS camera 238 receive visible light reflected by the cereal to determine whether, for example, the grain such as rice is in a dark color state such as black. it can. When the front CMOS camera 236 and the rear CMOS camera 238 detect dark-colored grains, a black image is generated as an image of the dark-colored grains. That is, it can be determined whether or not the grain is a dark-colored grain depending on whether or not a black image exists.

  Further, when the grain dropped from the chute 140 passes through the irradiation region IR, that is, when the grain exists in the irradiation region IR, the deep ultraviolet light emitted from the front ultraviolet light emitting diode 214 is irradiated to the grain, and the grain When mold fungi are generated, fluorescence is emitted from the mold fungi. The front CMOS camera 236 receives the fluorescence emitted by the mold. Note that when no grain is present in the irradiation region IR, the front CMOS camera 236 does not receive fluorescence.

  Similarly, when the grain dropped from the chute 140 passes through the irradiation area IR, that is, when the grain exists in the irradiation area IR, the deep ultraviolet light emitted from the rear ultraviolet light emitting diode 224 is irradiated to the grain. When mold fungi are generated in the grain, the mold emits fluorescence. The rear CMOS camera 238 receives the fluorescence emitted by the fungus. Note that when the grain is not present in the irradiation region IR, the rear CMOS camera 238 does not receive the fluorescence.

  When the front CMOS camera 236 and the rear CMOS camera 238 receive the fluorescence, it can be determined that fungi such as fungi are generated on the grain. When the front CMOS camera 236 and the rear CMOS camera 238 receive fluorescence, a white image is generated as an image of fungi such as mold. That is, it is possible to determine whether or not the grain has fungi such as mold fungi generated depending on whether or not a white image exists.

<<< Arrangement of Chute Groove 146 and Optical System 200 >>>

<Irradiation area IR>
As described above, the chute 140 has 60 chute grooves 146 formed therein. Grain falling from the lower end portion 144 of the chute 140 always passes through the passing region PR and the irradiation region IR located at the lower end portion 144 of the chute 140 (as described above, the irradiation region IR is included in the passing region PR). Part area). As shown in FIG. 2A, specifically, the grain falling from the chute groove 146 in the central region SH-M of the chute 140 passes through the central region IR-M of the irradiation region IR, and the left side of the chute 140. Grain falling from the chute groove 146 in the region SH-L passes through the left region IR-L of the irradiation region IR, and the grain falling from the chute groove 146 in the right end SH-R of the chute 140 is in the irradiation region IR. Pass the right region IR-R. Thus, since the grain can fall from all 60 chute grooves 146, the irradiation region IR becomes a long region extending in the horizontal direction (see FIG. 2A).

  Front light source system 210 (front RGB light emitting diode 212, front ultraviolet light emitting diode 214, front infrared light emitting diode 216) and rear light source system 220 (rear RGB light emitting diode 222, rear ultraviolet light emitting diode 224, rear infrared light) Visible light, deep ultraviolet light, and near infrared light emitted from both of the light emitting diodes 226) are illuminated (so as to pass through) the entire irradiation region IR that is long in the horizontal direction. In addition, the front light source system 210 and the rear light source system 220 are configured and arranged. That is, not only the central region IR-M of the irradiation region IR but also the light emitted from the front light source system 210 and the rear light source system 220 in any of the left region IR-L and the right region IR-R, It is necessary to configure so that illumination is performed with substantially uniform illuminance.

  As shown in FIG. 2, the horizontal lengths of the rear light source system 220 (rear RGB light emitting diode 222, rear ultraviolet light emitting diode 224, rear infrared light emitting diode 226) are all horizontal in the irradiation region IR. The left end of the rear light source system 220 is located on the left side of the left end of the irradiation region IR, and the right end of the rear light source system 220 is on the right side of the irradiation region IR. Located on the right side of the edge. With this configuration, the light emitted from the rear ultraviolet light emitting diode 224 and the rear infrared light emitting diode 226 is illuminated uniformly so as to include the entire irradiation region IR (the entire irradiation region IR). It is illuminated so as to spread (cover). The front light source system 210 (front RGB light emitting diode 212, front ultraviolet light emitting diode 214, front infrared light emitting diode 216) can be similarly configured. The light from the front light source system 210 and the rear light source system 220 can be illuminated with a substantially uniform illuminance on the grain passing through the irradiation region IR at any position of the irradiation region IR without depending on the position of the irradiation region IR. The quality of the grain passing through the irradiation area IR can be appropriately determined.

<Light reception range and light reception timing>
Further, as described above, the grain is guided to the chute 140 from the stored tank 120 through the feeder 130. One grain stored in the tank 120 is distributed to any one of the 60 chute grooves 146 by the vibration of the feeder 130. Since the distribution to the chute groove 146 is based on the vibration of the feeder 130, the chute groove 146 to which one grain is guided is randomly determined, and the timing at which one grain is guided to the chute groove 146 is also randomly determined. .

  Therefore, the chute groove 146 through which the grain is guided is also random, and the timing at which the grain starts to fall is also random. For this reason, it is necessary to always detect the grains falling from the 60 chute grooves 146 over the entire 60 chute grooves 146. Thus, the visible light region CIS 232, the near infrared light region CIS 234, the front side CMOS camera 236, and the rear side CMOS camera 238 always receive light for all of the 60 chute grooves 146 and output light reception signals. There is a need. That is, the CIS 232 for visible light region, the CIS 234 for near-infrared light region, the front CMOS camera 236, and the rear CMOS camera 238 are the entire long irradiation region IR extending in the horizontal direction (see FIG. 2A). Is always received (detected, photographed) and a received light signal is output.

<<< Arrangement of Chute Groove 146 and Exhaust Hole 414 >>>
As described above, the grain is randomly distributed to one of the 60 chute grooves 146. That is, one grain is randomly guided to one of the 60 chute grooves 146. Once the grain is guided to one chute groove 146, the grain is guided to the one chute groove 146 and falls from the one chute groove 146. That is, the grain that has been guided by the one chute groove 146 and dropped can be controlled in association with the one chute groove 146 that has been guided. As will be described later, when removing a grain determined to be defective, it is controlled as a grain associated with one guided chute groove 146.

  As shown in FIGS. 2A and 2B, the exhaust holes 414 of the air gun 410 are formed so as to correspond to the 60 chute grooves 146, respectively. That is, 60 exhaust holes 414 are formed corresponding to the 60 chute grooves 146. For example, the 37th exhaust groove 414 is associated with the 37th chute groove 146 (FIG. 2 ( a) See downward arrow).

  When it is determined that the grain falling away from the chute groove 146 is defective, the air gun 410 of the air gun drive system 400 is driven to air from the exhaust hole 414 toward the falling grain. The movement direction of the falling grain is changed, and the grain is guided to the defective product storage tank 154 (see FIGS. 12 and 13 to be described later).

  As described above, the exhaust holes 414 are arranged corresponding to each of the chute grooves 146 (see FIG. 2B), and can change the moving direction of only the grains determined to be defective. The grains determined to be non-defective are dropped as they are without changing the moving direction and stored in the non-defective storage tank 152.

  In this manner, the grains falling from each of the chute grooves 146 are judged as good or bad separately from each other, and air is discharged from the exhaust holes 414 associated with the chute grooves 146 guiding the grains judged to be defective. By doing so, the moving direction of the fall of the defective grain can be changed. By changing the moving direction of the grain, the defective grain can be guided and removed to the defective storage tank 154. In other words, the grain that has been guided and dropped by one chute groove 146 is judged to be defective if it is determined whether the grain is associated with one guided chute groove 146 and is defective. Only the processed grain is removed in association with one guided chute groove 146.

  For example, when it is determined that the grain that has been guided by the 18th chute groove 146 and dropped is defective, the movement direction of the grain by the air discharged from the exhaust hole 414 associated with the 18th chute groove. Is changed and guided to the defective product storage tank 154.

  It should be noted that defective grains can be accurately removed by controlling the exhaust holes 414 to discharge air when the grains determined to be defective pass through the front of the exhaust holes 414. . The timing for discharging air from the exhaust hole 414 will be described in detail later.

<<< Control Processing System 300 >>>
As shown in FIG. 6, the control processing system 300 includes a signal processing board 310, an image processing board 320, an air gun control board 330, and a light source control device 340.

<< Signal Processing Board 310 >>
The signal processing board 310 mainly includes a CPU (central processing unit), ROM (read only memory), RAM (random access memory), I / O port (input / output port), and communication IF (communication interface) ( Not shown).

  The visible light region CIS 232 and the near-infrared light region CIS 234 are connected to the I / O port of the signal processing board 310 so as to communicate with each other. The visible light region CIS 232 and the near infrared light region CIS 234 output a light reception signal based on the received visible light or near infrared light, and are output from the visible light region CIS 232 and the near infrared light region CIS 234. The received light signal is input to the signal processing board 310 via the I / O port.

  The CPU of the signal processing board 310 receives the light reception signals output from the CIS 232 for visible light region and the CIS 234 for near infrared light region, and determines the quality of the grain. Further, when the CPU of the signal processing board 310 determines that the product is defective, it outputs a control signal for driving an air gun valve 412 described later via the communication IF.

<Reception of visible light CIS 232 and near-infrared light CIS 234>
As described above, the chute groove 146 through which the grain is guided is also random, and the timing at which the grain starts to fall is also random, and the grains falling from the 60 chute grooves 146 are all of the 60 chute grooves 146. It is necessary to detect at all times. Thus, the visible light region CIS 232 and the near-infrared light region CIS 234 need to always receive light for all of the 60 chute grooves 146 and output a light reception signal. For this reason, the light reception signals output from the visible light region CIS 232 and the near-infrared light region CIS 234 include information received on all 60 chute grooves 146.

<Light reception signal output from CIS 232 for visible light region>
As described above, the light reception signal output from the visible light region CIS 232 includes information received by the visible light region CIS 232 at a certain timing for each of all 60 chute grooves 146. In other words, in the light receiving signal, when the grain exists in the irradiation region IR at one timing at the timing, the visible light emitted from the front RGB light emitting diode 212 and the rear RGB light emitting diode 222 is the grain. When the other chute groove 146 has no grain in the irradiation region IR, the information is transmitted from the front RGB light emitting diode 212 and the rear RGB light emitting diode 222. Information indicating that the visible light is directly received is included. Thus, the light reception signal includes information indicating the transmittance corresponding to each of all 60 chute grooves 146. The CPU of the signal processing board 310 determines the quality of the grain from the information indicating the transmittance.

<Light reception signal output from CIS 234 for near infrared light region>
The light reception signal output from the near-infrared light region CIS 234 includes information received by the near-infrared light region CIS 234 for each of all 60 chute grooves 146 at a certain timing. In other words, the near-red light emitted from the front-side infrared light-emitting diode 216 and the rear-side infrared light-emitting diode 226 when the grain is present in the irradiation region IR with respect to one chute groove 146 at the timing of the received light signal. In the case where information indicating transmittance when external light passes through the grain is included and no grain exists in the irradiation region IR with respect to the other chute grooves 146, the front infrared light emitting diode 216 and the rear infrared light emitting diode 226 are included. Information indicating that near-infrared light emitted from is directly received is included. Thus, the light reception signal includes information indicating the transmittance corresponding to each of all 60 chute grooves 146. The CPU of the signal processing board 310 determines the quality of the grain from the information indicating the transmittance.

  A ROM (Read Only Memory) is a program for receiving the above-described received light signal, a program for judging the quality of the grain, a program for generating a control signal for driving the valve 412 of the air gun 410, The constants used for these programs are stored.

  A RAM (Random Access Memory) stores values of variables used when executing the various programs described above.

<< Image Processing Substrate 320 >>
Similar to the signal processing board 310, the image processing board 320 mainly includes a CPU (central processing unit), a ROM (read only memory), a RAM (random access memory), an I / O port (input / output port), and a communication IF. (Communication interface) (not shown).

  The front CMOS camera 236 and the rear CMOS camera 238 described above are communicably connected to the I / O port of the image processing board 320. The front CMOS camera 236 and the rear CMOS camera 238 output a light reception signal based on the received visible light and fluorescence, and the light reception signals output from the front CMOS camera 236 and the rear CMOS camera 238 are connected to the I / O port. To the image processing board 320.

  The CPU of the image processing board 320 receives the light reception signals output from the front CMOS camera 236 and the rear CMOS camera 238 and determines whether the grain is good or bad. Further, when the CPU of the image processing board 320 determines that the product is defective, it outputs a control signal for driving a later-described air gun valve 412 via the communication IF.

<Reception of Front CMOS Camera 236 and Rear CMOS Camera 238>
As described above, the chute groove 146 through which the grain is guided is also random, and the timing at which the grain starts to fall is also random, and the grains falling from the 60 chute grooves 146 are all of the 60 chute grooves 146. It is necessary to detect at all times. As described above, the front side CMOS camera 236 and the rear side CMOS camera 238 need to always receive light for all of the 60 chute grooves 146 and output a light reception signal. For this reason, the light reception signals output from the front CMOS camera 236 and the rear CMOS camera 238 include information received on all the 60 chute grooves 146.

<Light reception signal output from front CMOS camera 236>
As described above, the light reception signal output from the front CMOS camera 236 includes information received by the front CMOS camera 236 at a certain timing for each of all 60 chute grooves 146. In other words, in the light receiving signal, when the grain exists in the irradiation region IR at one timing at the timing, the visible light emitted from the front RGB light emitting diode 212 and the rear RGB light emitting diode 222 is the grain. If the other chute grooves 146 contain no grain in the irradiation region IR, the visible light emitted from the front RGB light emitting diode 212 and the rear RGB light emitting diode 222 is included. Information indicating that the light was not reflected by the grain is included. Thus, the light reception signal includes information indicating the reflectance corresponding to each of all 60 chute grooves 146. The CPU of the image processing board 320 determines the quality of the grain from the information indicating the reflectance.

  Further, in the light reception signal, when the grain exists in the irradiation region IR at one timing and the fungus such as fungus is generated in the grain at the timing, the front ultraviolet light emitting diode 214 and the rear side In the case where information indicating that fluorescence is generated by the deep ultraviolet light emitted from the ultraviolet light emitting diode 224 is included and no grain exists in the irradiation region IR with respect to the other chute grooves 146, the front ultraviolet light emitting diode 214 and the rear ultraviolet light emitting diode 214 Information indicating that fluorescence was not generated by the deep ultraviolet light emitted from the side ultraviolet light emitting diode 224 is included. As described above, the light reception signal includes information indicating that fluorescence is generated corresponding to each of all 60 chute grooves 146. The CPU of the image processing board 320 determines the quality of the grain from the information indicating that the fluorescence is generated.

<Light reception signal output from rear CMOS camera 238>
As described above, the light reception signal output from the rear CMOS camera 238 includes information received by the rear CMOS camera 238 at a certain timing for each of all 60 chute grooves 146. In other words, in the light receiving signal, when the grain exists in the irradiation region IR at one timing at the timing, the visible light emitted from the front RGB light emitting diode 212 and the rear RGB light emitting diode 222 is the grain. If the other chute grooves 146 contain no grain in the irradiation region IR, the visible light emitted from the front RGB light emitting diode 212 and the rear RGB light emitting diode 222 is included. Information indicating that the light was not reflected by the grain is included. Thus, the light reception signal includes information indicating the reflectance corresponding to each of all 60 chute grooves 146. The CPU of the image processing board 320 determines the quality of the grain from the information indicating the reflectance.

  Further, in the light reception signal, when the grain exists in the irradiation region IR at one timing and the fungus such as fungus is generated in the grain at the timing, the front ultraviolet light emitting diode 214 and the rear side In the case where information indicating that fluorescence is generated by the deep ultraviolet light emitted from the ultraviolet light emitting diode 224 is included and no grain exists in the irradiation region IR with respect to the other chute grooves 146, the front ultraviolet light emitting diode 214 and the rear ultraviolet light emitting diode 214 Information indicating that fluorescence was not generated by the deep ultraviolet light emitted from the side ultraviolet light emitting diode 224 is included. As described above, the light reception signal includes information indicating that fluorescence is generated corresponding to each of all 60 chute grooves 146. The CPU of the image processing board 320 determines the quality of the grain from the information indicating that the fluorescence is generated.

<< Air gun control board 330 >>
Similar to the signal processing board 310 and the image processing board 320, the air gun control board 330 mainly includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), an I / O port (input / output). Port) and a communication IF (communication interface) (not shown).

  The signal processing board 310 and the image processing board 320 described above are communicably connected to the communication IF of the air gun control board 330. The signal processing board 310 and the image processing board 320 output various information and control signals for driving the air gun valve 412, and are input to the air gun control board 330 via the communication IF.

  The air gun control board 330 starts timing from when the timing to start timing, and outputs an opening control signal to the air gun 410 to open the valve 412 of the air gun when the waiting time has elapsed since the timing was started. The air gun 410 opens the air gun valve 412 in response to the input of the opening control signal.

  The air gun control board 330 outputs a closing control signal for closing the air gun valve 412 to the air gun 410 when the valve opening time has elapsed since the opening control signal was output to the air gun 410. The air gun 410 closes the air gun valve 412 in response to the input of the closing control signal.

<< light source control device 340 >>
The light source control device 340 controls the front light source system 210 and the rear light source system 220. Specifically, the light source control device 340 controls lighting, extinction, emission intensity, and the like of the front RGB light emitting diode 212, the front ultraviolet light emitting diode 214, and the front infrared light emitting diode 216 of the front light source system 210. Similarly, the light source control device 340 controls lighting, extinction, emission intensity, and the like of the rear RGB light emitting diode 222, the rear ultraviolet light emitting diode 224, and the rear infrared light emitting diode 226 of the rear light source system 220.

  The light source control device 340 includes the front RGB light emitting diode 212, the front ultraviolet light emitting diode 214, the front infrared light emitting diode 216, the rear RGB light emitting diode 222, the rear ultraviolet light emitting diode 224, and the rear infrared light emitting diode 226 independently of each other. To control lighting, extinction, emission intensity, etc. That is, the light source control device 340 can turn on or off any of these six light emitting diodes. Further, the light source control device 340 can appropriately control the light emission intensity of any of the six light emitting diodes.

  A combination of any one of the front RGB light emitting diode 212, the front ultraviolet light emitting diode 214, the front infrared light emitting diode 216, the rear RGB light emitting diode 222, the rear ultraviolet light emitting diode 224, and the rear infrared light emitting diode 226 is linked. You may make it control.

  As described above, the front-side RGB light-emitting diode 212 and the rear-side RGB light-emitting diode 222 are composed of three types of light-emitting diodes: a red light-emitting diode, a green light-emitting diode, and a blue light-emitting diode. The light source control device 340 can control the red light emitting diode, the green light emitting diode, and the blue light emitting diode constituting the front RGB light emitting diode 212 and the rear RGB light emitting diode 222 independently of each other. In other words, the light source control device 340 turns on, turns off, and emits light intensity of the red, green, and blue light-emitting diodes constituting the front-side RGB light-emitting diode 212 and the rear-side RGB light-emitting diode 222 independently of each other. Control. Accordingly, since the on / off and emission intensity of the red light emitting diode, the green light emitting diode, and the blue light emitting diode are controlled, light of a desired color can be emitted from the front RGB light emitting diode 212 and the rear RGB light emitting diode 222. .

  As described above, the light source control device 340 can control the light emitting diodes constituting the front RGB light emitting diode 212 and the rear RGB light emitting diode 222 independently of each other. It is possible to illuminate the corresponding light, and it is possible to accurately detect defects that occur according to the type of grain.

  In the above-described example, the light source control device 340 controls the light emitting diodes constituting the front RGB light emitting diode 212 and the rear RGB light emitting diode 222 independently of each other from the signal processing board 310 and the image processing board 320. However, the light source control device 340 is communicably connected to the signal processing board 310, the image processing board 320, and the like, and the light source control device 340 receives the commands from the signal processing board 310, the image processing board 320, etc. You may make it control the light emitting diode which comprises the front side RGB light emitting diode 212 and the back side RGB light emitting diode 222. FIG. With this configuration, it is possible to control lighting, extinction, emission intensity, and the like of the light-emitting diode according to the detection result and the determination result, so that defects that may occur depending on the type of grain are detected more accurately. be able to.

  Further, the signal processing board 310 and the image processing board 320 may directly control the light-emitting diodes constituting the front-side RGB light-emitting diode 212 and the rear-side RGB light-emitting diode 222 without using the light source control device 340. . By doing in this way, while being able to simplify the structure of the target object classification apparatus 10, the light emitting diode which comprises the front side RGB light emitting diode 212 and the back side RGB light emitting diode 222 can be controlled quickly, and it falls. It is possible to accurately judge all of the grains that are being processed.

<<< Control Processing in Control Processing System 300 >>>
In the following, the target object selection device 10 is activated, and initial operations such as initialization in the signal processing board 310, the image processing board 320, and the air gun control board 330 are all completed and are operating steadily. Shall.

<Signal processing board judgment processing>
7 and 8 show signal processing board determination processing executed in the signal processing board 310. FIG.

  First, the CPU of the signal processing board 310 determines one chute groove 146 to be inspected (step S711). As described above, in the present embodiment, there are 60 chute grooves 146 from the first chute groove 146 to the 60th chute groove 146, and the processing of step S711 is performed by assigning one number of the chute groove 146. It is a process to decide. The following processes in steps S713 to S832 are processes for determining a non-defective grain that has fallen from one chute groove 146 whose number is determined by the process in step S711.

  Next, the CPU of the signal processing board 310 determines whether or not the received light intensity of the visible light region CIS 232 is equal to or higher than a first predetermined value (step S713). Here, the first predetermined value is a value relating to the transmittance of visible light, is a value determined by the color of the grain, and can be appropriately determined according to the color of the grain to be removed as a defective product. That is, the determination process in step S713 is a process for determining whether or not a grain is defective for the color of the grain. For example, it is a case where the grain is in a dark color state, and this is a determination for removing the grain in the dark color state as a defective product.

  When the CPU of the signal processing board 310 determines that the received light intensity of the CIS 232 for visible light region is equal to or higher than the first predetermined value (YES) in the determination processing of step S713, it determines the timing to start timing (step S715). A waiting time is determined (step S717), and a valve opening time is determined (step S719).

  The aforementioned “timing start timing”, “waiting time”, and “valve opening time” are parameters used for controlling the opening / closing of the valve 412 of the air gun 410 (see FIG. 15). FIG. 15 is a timing chart showing the relationship between “timing start timing”, “waiting time”, and “valve opening time”.

  “Time measurement start timing” is a start time for starting a timer for determining the timing of opening / closing control of the valve 412. Timing is started by starting the timer, and the timer value is updated. Based on the timer value, it is determined whether the “waiting time” and the “valve opening time” have elapsed.

  The “waiting time” is a time for waiting until the valve 412 is subjected to the opening control. That is, when it is determined in step S713 that the received light intensity of the visible light region CIS 232 is greater than or equal to the first predetermined value, the valve 412 is immediately opened when it is determined that the grain is defective. Instead, the valve 412 is controlled to be opened after the standby time has elapsed (time t3 in FIG. 15). A certain amount of time is required until the grain further falls and reaches the front of the exhaust hole 414 of the air gun 410 after it is determined that the grain is defective. The time from when it is determined that the grain is defective is the waiting time until it reaches the front of the exhaust hole 414 of the air gun 410.

  When the “waiting time” is short, the timing at which the valve 412 is opened is earlier, so that the airflow from the air gun 410 is sprayed on the grain that has fallen before the grain determined to be defective. And the possibility of removing the preceding grain judged to be non-defective arises. In addition, when the “standby time” is long, the timing at which the valve 412 is opened is delayed, and the timing at which air is started to be sprayed on defective grains is delayed. For this reason, an inadequate amount of air can be given to defective grains, and the moving direction cannot be changed sufficiently. As a result, there is a possibility that defective grains cannot be guided to the defective storage tank 154 and defective grains are mixed with non-defective grains. Therefore, in order to accurately remove only the grains determined to be defective, it is necessary to determine an appropriate “waiting time”.

  When the mass is light, the falling speed is slow, and the time until it reaches the front of the exhaust hole 414 becomes long. Therefore, when the grain mass is light, it is necessary to set a long “waiting time”. In addition, when the mass is heavy, the falling speed is increased, and the time required to reach the front of the exhaust hole 414 is shortened. Accordingly, when the grain mass is heavy, it is necessary to set the “waiting time” short.

  The “valve opening time” is the time from when the valve 412 is opened until it is closed (time t4 in FIG. 15), and is the time during which air is discharged from the exhaust hole 414 where the valve 412 is opened. The amount of air discharged is determined by the “valve opening time”, and the force (impulse) applied to the cereal is determined by blowing an air flow on the cereal determined to be defective. Also,

  When the “valve opening time” is short, the timing at which the valve 412 is closed is earlier, and therefore the timing at which air is blown against the grain determined to be defective is earlier. For this reason, an inadequate amount of air can be given to defective grains, and the moving direction cannot be changed sufficiently. As a result, there is a possibility that defective grains cannot be guided to the defective storage tank 154 and defective grains are mixed with non-defective grains. In addition, when the “valve open time” is long, the airflow from the air gun 410 may be sprayed on the grain falling after the grain determined to be defective. There is a possibility of removing grains that are determined to be. Therefore, in order to accurately remove only the grains determined to be defective, it is necessary to determine an appropriate “valve open time”.

  As described above, when the mass is light, the falling speed is slow, and the time for passing in front of the exhaust hole 414 is lengthened. Therefore, when the mass of the grain is light, it is necessary to set a longer “valve opening time”. Further, when the mass is heavy, the falling speed is increased, and the time for passing through the front of the exhaust hole 414 is shortened. Accordingly, when the grain mass is heavy, it is necessary to set the “valve open time” short.

  After executing the processing of step S719, the CPU of the signal processing board 310 outputs the chute groove number, timing start timing, standby time, and valve opening time to the air gun control board 330 (step S721). This chute groove number is the number of the chute groove 412 corresponding to the grain judged to be defective.

  Next, the CPU of the signal processing board 310 outputs to the air gun control board 330 an NG signal indicating that the received light intensity of the visible light region CIS 232 is equal to or higher than the first predetermined value (step S722).

  In the present embodiment, as shown in FIG. 15, the NG signal is a signal composed of one pulse, and the air gun control board 330 receives the NG signal to detect that defective grains have been generated. And a control process for driving the valve 412 is executed. As described above, the NG signal is a signal composed of one pulse, and has a rising portion (time t1) and a falling portion (time t2) of the pulse. The above “timing start timing” is information indicating either the rising edge or the falling edge of the pulse. That is, the “timekeeping start timing” is information for determining whether the rising part of the pulse is the start of timekeeping or the falling part of the pulse is the start of timekeeping.

  As shown in FIG. 15, when the rising edge of the pulse is set to “timing start timing”, the standby time can be lengthened, and when the falling edge of the pulse is set to “timing start timing”, the standby time is set. Time can be shortened.

  When the CPU of the signal processing board 310 determines that the received light intensity of the CIS 232 for visible light region is not equal to or higher than the first predetermined value in the determination process of step S713 described above (NO), or when the process of step S721 is executed, It is determined whether the received light intensity of the visible light region CIS 232 is equal to or lower than a second predetermined value (step S723). Here, the second predetermined value is a value relating to the transmittance of visible light, is a value determined by the color of the grain, and can be appropriately determined according to the color of the grain to be removed as a defective product. For example, it is a case where the grain is in a light color state, and this is a judgment for removing the light grain state as a defective product.

  When the CPU of the signal processing board 310 determines in step S723 that the received light intensity of the visible light region CIS 232 is equal to or lower than the second predetermined value (YES), it determines the timing to start timing (step S725). A standby time is determined (step S727), and a valve opening time is determined (step S729). As described above, the “timing start timing”, “waiting time”, and “valve open time” are parameters used for controlling the opening / closing of the valve 412 of the air gun 410.

  After executing the processing of step S729, the CPU of the signal processing board 310 outputs the chute groove number, timing start timing, standby time, and valve opening time to the air gun control board 330 (step S731).

  Next, the CPU of the signal processing board 310 outputs to the air gun control board 330 an NG signal indicating that the received light intensity of the visible light region CIS 232 is equal to or lower than the second predetermined value (step S732).

  When the CPU of the signal processing board 310 determines that the received light intensity of the visible light region CIS 232 is not equal to or lower than the second predetermined value in the determination process of step S723 described above (NO), or when the process of step S732 is executed, The process moves to step S813.

  The CPU of the signal processing board 310 determines whether or not the light reception intensity of the near-infrared light region CIS 234 is equal to or higher than a first predetermined value (step S813). Here, the first predetermined value is a value related to the transmittance of near-infrared light, is a value determined by the amount of moisture, and can be appropriately determined according to the amount of moisture to be removed as a defective product.

  When the CPU of the signal processing board 310 determines that the amount of water obtained from the light reception signal of the CIS 234 for near-infrared light region is greater than or equal to the first predetermined value in the determination processing of step S813 (YES), the timing of timing start (Step S815), the standby time is determined (step S817), and the valve opening time is determined (step S819). As described above, the “timing start timing”, “waiting time”, and “valve open time” are parameters used for controlling the opening / closing of the valve 412 of the air gun 410.

  After executing the processing of step S819, the CPU of the signal processing board 310 outputs the chute groove number, timing start timing, standby time, and valve opening time to the air gun control board 330 (step S821).

  Next, the CPU of the signal processing board 310 outputs to the air gun control board 330 an NG signal indicating that the received light intensity of the visible light region CIS 232 is equal to or higher than the first predetermined value (step S822).

  When the CPU of the signal processing board 310 determines that the amount of water obtained from the light reception signal of the CIS 234 for near-infrared light region is not greater than or equal to the first predetermined value in the determination processing of step S813 described above (NO), or step When the processing of S821 is executed, it is determined whether or not the amount of water obtained from the light reception signal of the near-infrared light region CIS 234 is equal to or smaller than a second predetermined value (step S823). Here, the second predetermined value is a value related to the transmittance of near-infrared light, is a value determined by the amount of moisture, and can be appropriately determined according to the amount of moisture to be removed as a defective product.

  When the CPU of the signal processing board 310 determines in step S823 that the moisture content obtained from the light reception signal of the near-infrared light region CIS 234 is equal to or less than the second predetermined value (YES), the timing start timing Is determined (step S825), a standby time is determined (step S827), and a valve opening time is determined (step S829). As described above, the “timing start timing”, “waiting time”, and “valve open time” are parameters used for controlling the opening / closing of the valve 412 of the air gun 410.

  After executing the process of step S829, the CPU of the signal processing board 310 outputs the chute groove number, timing start timing, standby time, and valve opening time to the air gun control board 330 (step S831).

  Next, the CPU of the signal processing board 310 outputs to the air gun control board 330 an NG signal indicating that the received light intensity of the visible light region CIS 232 is equal to or lower than the second predetermined value (step S832).

  When the CPU of the signal processing board 310 determines in step S823 that the moisture content obtained from the light reception signal of the near-infrared light region CIS 234 is not less than or equal to the second predetermined value (NO), or in step S832 When the process is executed, the CPU of the signal processing board 310 determines whether or not all the chute grooves 146 to be inspected have been detected (step S833). When it is determined that all the chute grooves 146 to be inspected have not been detected (NO), the process returns to step S711 described above. On the other hand, when it is determined that all the chute grooves 146 to be inspected have been detected (YES), this subroutine is terminated. In this way, all of the 60 chute grooves 146 can be detected.

<Image processing board judgment process>
9 and 10 show image processing board determination processing executed on the image processing board 320. FIG.

  First, the CPU of the image processing board 320 determines one chute groove 146 to be inspected (step S911). As described above, in the present embodiment, there are 60 chute grooves 146 from the first chute groove 146 to the 60th chute groove 146, and the process of step S911 is a process of determining the number of the chute groove 146 It is.

  Next, the CPU of the image processing board 320 determines whether or not the light reception intensity of the front CMOS camera 236 is greater than or equal to a first predetermined value (step S913). Here, the first predetermined value is a value related to the intensity of fluorescence, and is a value determined by the state of the color of the grain and the occurrence of bacteria, and is appropriately determined according to the state of the grain to be removed as a defective product. Can do. That is, the determination process of step S913 is a process of determining whether or not a grain is defective with respect to the state of the grain. For example, it is a process for determining whether or not fungi such as mold fungi are occurring in the grain.

  When the CPU of the image processing board 320 determines in step S913 that the received light intensity of the front CMOS camera 236 is greater than or equal to the first predetermined value (YES), it determines the timing to start timing (step S915) and waits. The time is determined (step S917), and the valve opening time is determined (step S919). Similar to the signal processing board 310, the “timing start timing”, “standby time”, and “valve open time” are parameters used to control the opening / closing of the valve 412 of the air gun 410.

  After executing the processing of step S919, the CPU of the image processing board 320 outputs the chute groove number, timing start timing, standby time, and valve opening time to the air gun control board 330 (step S921). This chute groove number is the number of the chute groove 412 corresponding to the grain judged to be defective.

  Next, the CPU of the image processing board 320 outputs an NG signal indicating that the received light intensity of the front CMOS camera 236 is equal to or higher than the first predetermined value to the air gun control board 330 (step S922).

  When the CPU of the image processing board 320 determines that the received light intensity of the front CMOS camera 236 is not equal to or higher than the first predetermined value in the determination process of step S913 described above (NO) or when the process of step S922 is executed, the front side It is determined whether the received light intensity of the CMOS camera 236 is less than or equal to a second predetermined value (step S923). Here, the second predetermined value is a value related to the intensity of the fluorescence, and is a value determined by the state of the grain color, the occurrence of bacteria, etc., and is appropriately determined according to the state of the grain to be removed as a defective product. Can do. That is, the determination process of step S923 is a process of determining whether or not a grain is defective with respect to the state of the grain. For example, it is a process for determining whether or not fungi such as mold fungi are occurring in the grain.

  When the CPU of the image processing board 320 determines in step S923 that the received light intensity of the front CMOS camera 236 is equal to or lower than the second predetermined value (YES), it determines the timing to start timing (step S925) and waits. The time is determined (step S927), and the valve opening time is determined (step S929). As described above, the “timing start timing”, “waiting time”, and “valve open time” are parameters used for controlling the opening / closing of the valve 412 of the air gun 410.

  After executing the process of step S929, the CPU of the image processing board 320 outputs the chute groove number, timing start timing, standby time, and valve opening time to the air gun control board 330 (step S931).

  Next, the CPU of the image processing board 320 outputs an NG signal indicating that the received light intensity of the front CMOS camera 236 is equal to or lower than the second predetermined value to the air gun control board 330 (step S932).

  When the CPU of the image processing board 320 determines that the received light intensity of the front CMOS camera 236 is not less than or equal to the second predetermined value in the determination process of step S923 described above (NO), or the process of step S932 is executed, To step S1013.

  The CPU of the image processing board 320 determines whether or not the received light intensity of the rear CMOS camera 238 is greater than or equal to a first predetermined value (step S1013). Here, the first predetermined value is a value relating to the reflectance of visible light, and is a value determined by the state of the color of the grain and the occurrence of bacteria, and is appropriately determined according to the state of the grain to be removed as a defective product. Can be determined. That is, the determination process in step S1013 is a process for determining whether or not a grain is defective with respect to the state of the grain. For example, it is a process for determining whether or not fungi such as mold fungi are occurring in the grain.

  When the CPU of the image processing board 320 determines that the received light intensity of the rear CMOS camera 238 is greater than or equal to the first predetermined value in the determination process of step S1013 (YES), it determines the timing to start timing (step S1015). A waiting time is determined (step S1017), and a valve opening time is determined (step S1019). As described above, the “timing start timing”, “waiting time”, and “valve open time” are parameters used for controlling the opening / closing of the valve 412 of the air gun 410.

  After executing the processing of step S1019, the CPU of the image processing board 320 outputs the chute groove number, timing start timing, standby time, and valve opening time to the air gun control board 330 (step S1021).

  Next, the CPU of the image processing board 320 outputs an NG signal indicating that the received light intensity of the rear CMOS camera 238 is equal to or lower than the first predetermined value to the air gun control board 330 (step S1022).

  When the CPU of the image processing board 320 determines that the received light intensity of the rear CMOS camera 238 is not equal to or higher than the first predetermined value in the determination process of step S1013 described above (NO) or when the process of step S1021 is executed, It is determined whether or not the received light intensity of the rear CMOS camera 238 is less than or equal to a second predetermined value (step S1023). Here, the second predetermined value is a value related to the reflectance of visible light, and is a value determined by the state of the color of the grain and the occurrence of bacteria, and is appropriately determined according to the state of the grain to be removed as a defective product. Can be determined. That is, the determination process in step S1023 is a process for determining whether or not a grain is defective with respect to the state of the grain. For example, it is a process for determining whether or not fungi such as mold fungi are occurring in the grain.

  When the CPU of the image processing board 320 determines in step S1023 that the received light intensity of the rear CMOS camera 238 is equal to or lower than the second predetermined value (YES), it determines the timing to start timing (step S1025). A standby time is determined (step S1027), and a valve opening time is determined (step S1029). As described above, the “timing start timing”, “waiting time”, and “valve open time” are parameters used for controlling the opening / closing of the valve 412 of the air gun 410.

  After executing the processing of step S1029, the CPU of the image processing board 320 outputs the chute groove number, timing start timing, standby time, and valve opening time to the air gun control board 330 (step S1031).

  Next, the CPU of the image processing board 320 outputs an NG signal indicating that the received light intensity of the rear CMOS camera 238 is equal to or lower than the second predetermined value to the air gun control board 330 (step S1032).

  When the CPU of the image processing board 320 determines in step S1023 that the received light intensity of the rear CMOS camera 238 is not less than or equal to the second predetermined value (NO) or when the processing of step S1032 is executed, The CPU of the substrate 320 determines whether or not all the chute grooves 146 to be inspected have been detected (step S1033). When it is determined that all the chute grooves 146 to be inspected have not been detected (NO), the process returns to step S911 described above. On the other hand, when it is determined that all the chute grooves 146 to be inspected have been detected (YES), this subroutine is terminated. In this way, all of the 60 chute grooves 146 can be detected.

<Valve open / close control processing>
FIG. 11 is a valve opening / closing control process executed in the air gun control board 330. This valve opening / closing control process is called and executed at predetermined intervals by the timer interrupt process in the air gun control board 330.

  First, the CPU of the air gun control board 330 determines whether or not the chute groove number, timing start timing, standby time, and valve opening time output from the signal processing board 310 and the image processing board 320 have been received (step S1111). ).

  When the CPU of the air gun control board 330 determines that it has received the chute groove number, the timing start timing, the standby time, and the valve opening time output from the signal processing board 310 and the image processing board 320 (YES), it sets the chute groove number. Correspondingly, the timing start timing, the standby time, and the valve opening time are stored in the RAM of the air gun control board 330 (step S1113), and this subroutine is finished.

  The CPU of the air gun control board 330 has determined in step S1111 that it has not received the chute groove number, timing start timing, standby time, and valve opening time output from the signal processing board 310 and the image processing board 320. Sometimes (NO), it is determined whether or not an NG signal has been received (step S1115).

  When the CPU of the air gun control board 330 determines that the NG signal has been received (YES), it starts time measurement in correspondence with the chute groove number (step S1117) and ends this subroutine.

  As described above, the NG signal is composed of one pulse and has a rising portion and a falling portion of the pulse. The “timekeeping start timing” is information for determining whether the rising edge of the pulse is the start of timing or the falling edge of the pulse is the start of timekeeping. This “timing start timing” is stored in the RAM corresponding to the chute groove number in the process of step S1113. In the process of step S1117, the “timing start timing” corresponding to the chute groove number of the NG signal received in the process of step S1115 is read from the RAM, and the rising edge of the pulse or the rising edge of the pulse is determined according to the “timing start timing”. Start timing from the falling part.

  When determining that the NG signal has not been received (NO), the CPU of the air gun control board 330 determines whether there is a chute groove 146 that has passed the standby time (step S1119). The determination process of step S1119 is a process of determining whether or not there is a chute groove 146 that has passed the standby time among the 60 chute grooves 146.

  When the CPU of the air gun control board 330 determines that there is a chute groove 146 that has passed the standby time (YES), it outputs a control signal for opening the valve 412 corresponding to the chute groove 146 to the air gun 410 (step) S1121), this subroutine is terminated. By this processing, the valve 412 of the air gun 410 is opened, and the discharge of air from the exhaust hole 414 is started.

  When the CPU of the air gun control board 330 determines that there is no chute groove 146 that has passed the standby time (NO), it determines whether there is a chute groove 146 that has passed the valve opening time (step S1123). The determination process of step S1123 is a process of determining whether or not there is a chute groove 146 that has passed the valve opening time among the 60 chute grooves 146.

  When the CPU of the air gun control board 330 determines that there is a chute groove 146 that has passed the valve opening time (YES), it outputs a control signal for closing the valve 412 corresponding to the chute groove number to the air gun 410 (step) S1125), this subroutine is terminated. By this processing, the valve 412 of the air gun 410 is closed, and the discharge of air from the exhaust hole 414 is completed.

  By this valve opening / closing control process, an appropriate amount of air is blown onto the grain that has been determined to be defective, so that force can be applied to the grain and guided to the storage tank 154 for defective products.

<<< Specific example of change of grain movement direction >>>
12-14 is the schematic which shows the specific example which changes the moving direction of a grain.

  As shown in FIG. 12, the grain GR separated from the chute 140 falls obliquely downward. When the grain GR is present in the irradiation region IR (black circle), visible light emitted from the front RGB light emitting diode 212, deep ultraviolet light emitted from the front ultraviolet light emitting diode 214, and emitted from the front infrared light emitting diode 216 Near-infrared light, visible light emitted from the rear RGB light-emitting diode 222, deep ultraviolet light emitted from the rear-side ultraviolet light-emitting diode 224, and near-red light emitted from the rear-side infrared light-emitting diode 226 External light is irradiated to the grain GR.

As described above, the transmittance of the grain GR is detected by the visible light emitted from the front RGB light emitting diode 212 and the rear RGB light emitting diode 222 and transmitted through the grain GR.
Further, the reflectance of the grain GR is detected by visible light emitted from the front RGB light emitting diode 212 and the rear RGB light emitting diode 222 and reflected by the grain GR. Furthermore, the moisture of the grain GR is detected by the near infrared light emitted from the front infrared light emitting diode 216 and the rear infrared light emitting diode 226 and transmitted through the grain. Furthermore, when germs such as mold fungi are generated in the grain GR by the deep ultraviolet light emitted from the front ultraviolet light emitting diode 214 and the rear ultraviolet light emitting diode 224, fluorescence emitted from the mold fungus is detected. To do. From these detection results, it is determined whether or not the grain GR is a good product or a defective product.

When it is determined that the grain GR is defective, the air is discharged from the exhaust hole 414 at the timing when the grain GR passes the front of the exhaust hole 414, and the moving direction of the grain GR is changed. Accordingly, the grain GR is guided toward the defective product storage tank 154. On the other hand, when it is determined that the grain GR is a non-defective product, air is not discharged from the exhaust hole 414, and the grain GR moves toward the non-defective product storage tank 152.

<When a defective part FP is generated below the falling grain GR>
As shown in FIG. 13, when there is a defective part FP below the falling grain GR, the defective part FP of the grain GR is because the central part CT of the grain GR reaches the irradiation region IR (black circle). The irradiation region IR is reached earlier. The defective portion FP is a portion that is determined as a defective product based on the above-described transmittance, reflectance, moisture, fluorescence, and the like.

  Thus, when the defective part FP exists below the center part CT of the grain GR, the defective part FP can be detected at an early timing in the irradiation region IR. Further, since the grain GR passes through the front of the exhaust hole 414 at an early timing, the timing of starting the discharge of air becomes earlier, the time for blowing air to the grain GR can be lengthened, and a sufficient amount of air Can be given to the grain GR. For this reason, the moving direction of the grain GR can be changed, and the grain GR can be accurately guided toward the storage tank 154 for defective products.

  In addition, when the defective part FP has arisen in the whole grain GR, since the defective part FP of the lower end part of the grain GR is detected first, similarly, the defective part FP can be detected early, and similarly In addition, since a sufficient amount of air can be given to the grain GR, the moving direction of the grain GR can be changed, and the grain GR can be guided toward the defective product storage tank 154.

<When defective part FP has arisen above the falling grain GR>
As shown in FIG. 14, when the defective part FP exists above the falling grain GR, the defective part FP of the grain GR is moved to the irradiation area IR after the central part CT of the grain GR reaches the irradiation area IR. To reach.

  Thus, when the defective part FP exists above the center part CT of the grain GR, the defective part FP is detected at a later timing in the irradiation region IR. Accordingly, since the grain GR passes through the front of the exhaust hole 414 at a later timing, the timing for starting the discharge of air is also delayed, and the time during which air can be substantially blown to the grain GR must be shortened. And a sufficient amount of air cannot be given to the grain GR. For this reason, the moving direction of the grain GR cannot be changed, and it may be difficult to accurately guide the grain GR toward the defective product storage tank 154.

<<<<"Timing start timing", "Waiting time", "Valve opening time">>
FIG. 15 is a timing chart showing the relationship between the “rising part” and “falling part” of the pulse of the NG signal and the “timing start timing”, “waiting time”, and “valve opening time”.

  As described above, the “timing start timing” is a start time for starting a timer for determining the timing of opening / closing control of the valve 412. In the present embodiment, as shown in FIG. 15, the NG signal is a signal composed of one pulse, and the start time of starting the timer is the rising part of the pulse (time t1 in FIG. 15) or the falling part of the pulse. (Time t2 in FIG. 15). When the rising edge of the pulse is set as the start of timer activation, the timing of opening control of the valve 412 (time t3 in FIG. 15) can be advanced. On the other hand, when the falling edge of the pulse is the start of timer activation, the timing of opening control of the valve 412 (time t3 in FIG. 15) can be delayed. The start time of the timer can be changed while the “waiting time” is kept constant (without changing the “waiting time”). In particular, when the mass of foreign matter is heavy, the falling speed is fast, so that the timing of the opening control of the valve 412 can be accelerated by setting the rising edge of the pulse to the start of the timer, and the foreign matter is forward of the exhaust hole 414. The air can be discharged to the foreign matter at the timing of reaching.

  The “waiting time” is a time for waiting until the valve 412 is subjected to the opening control. When it is determined that the grain is defective, the valve 412 is not opened immediately, but the valve 412 is controlled to be opened after the standby time has elapsed (time t3 in FIG. 15). A certain amount of time is required until the grain further falls and reaches the front of the exhaust hole 414 of the air gun 410 after it is determined that the grain is defective. It is necessary to wait until the grain reaches the front of the exhaust hole 414 of the air gun 410 after it is determined that the grain is defective. This time is waiting time.

  When the “waiting time” is short, the timing at which the valve 412 is opened is earlier, so that the airflow from the air gun 410 is sprayed on the grain that has fallen before the grain determined to be defective. There is a possibility of removing the preceding grain judged to be good. In addition, when the “waiting time” is long, an insufficient amount of air is given to defective grains, and the moving direction cannot be changed sufficiently. As a result, there is a possibility that defective grains cannot be guided to the defective storage tank 154 and defective grains are mixed with non-defective grains.

  The “valve opening time” is the time from when the valve 412 is opened until it is closed (time t4 in FIG. 15), and is the time during which air is discharged from the exhaust hole 414 where the valve 412 is opened. The amount of air discharged is determined by the “valve opening time”.

  When the “valve opening time” is short, an insufficient amount of air is given to defective grains and the moving direction cannot be changed sufficiently. As a result, there is a possibility that defective grains cannot be guided to the defective storage tank 154 and defective grains are mixed with non-defective grains. In addition, when the “valve open time” is long, the airflow from the air gun 410 may be sprayed on the grain falling after the grain determined to be defective. There is a possibility of removing grains that are determined to be.

  As described above, when the mass of the grain is light, it is necessary to set the “waiting time” long. Further, when the grain mass is heavy, it is necessary to set the “waiting time” short. For example, when the grain is dried due to a defect, the mass becomes light, so the “standby time” needs to be set long. If the grain contains a lot of moisture due to a defect, the mass becomes heavy, and in the case of foreign matter such as plastic, the mass is heavy, so the “waiting time” needs to be set short.

  In addition, depending on the type of grain, information (average value, variation, etc.) regarding the standard mass of the non-defective grain is determined, and information (average value, variation, etc.) regarding the standard drop speed of the non-defective grain is also determined. From this standard drop speed, the “timing start timing”, “waiting time”, and “valve opening time” can be determined. That is, the “timing start timing”, “waiting time”, and “valve open time” for determining good grain as good can be determined. Furthermore, deviations or changes from the standard mass can also be determined by the type of failure that can occur depending on the type of grain. That is, the “timing start timing”, “waiting time”, and “valve opening time” for determining defective grains as defective products can be determined.

  As described above, in the target object sorting apparatus 10 according to the present embodiment, the “timing start timing”, the “waiting time”, and the “valve open time” are determined not only depending on the type of grain but also on the type of defect that may occur. It has established. The “timing start timing”, “waiting time”, and “valve opening time” thus determined are stored in the ROM and RAM of the signal processing board 310, the ROM and RAM of the image processing board 320, and the like. Then, it is read from the ROM or RAM according to the type of defect and output to the air gun control board 330.

  Specifically, in steps S721 and S731 of FIG. 7, steps S821 and S831 of FIG. 8, steps S921 and S931 of FIG. 9, and steps S1021 and S1031 of FIG. The “timing start timing”, “standby time”, and “valve open time” are read from the ROM and RAM of the signal processing board 310, the ROM and RAM of the image processing board 320, and output to the air gun control board 330. . The air gun control board 330 is a grain that is determined to be defective by discharging air from the exhaust hole 414 according to the “timing start timing”, “waiting time”, and “valve opening time” corresponding to the type of defect. Can be removed accurately.

  Furthermore, as described with reference to FIG. 14, it is assumed that a sufficient amount of air cannot be given to the grain GR even at the timing at which the defective portion FP can be detected. Therefore, in order to accurately remove only the grains determined to be defective, it is necessary to determine an appropriate “valve open time”. Information on the standard grain size (average value, variation, etc.) is determined according to the type of grain. From the standard drop speed and size of good grains, “timing start timing”, “waiting time” and “valve opening time” Can be determined.

<<< Other forms >>>
In the example described above, the number of chute grooves 146 of the chute 140 is 60, but the number of chute grooves 146 is not limited to 60. For example, in addition to the number of grains to be processed per unit time, the kind of grain, and the type of defect that occurs in the grain, the front light source system 210 (front RGB light emitting diode 212, front ultraviolet light emitting diode 214, front infrared light emitting diode 216). The shape and size can be determined as appropriate according to the shape and size of the rear light source system 220 (rear RGB light emitting diode 222, rear ultraviolet light emitting diode 224, rear infrared light emitting diode 226).

  Moreover, although the case where the number of light emitting diodes, such as a red light emitting diode, a green light emitting diode, and a blue light emitting diode, is 75 was shown in the example mentioned above, the number of light emitting diodes is not restricted to 75. In addition to the number of grains to be processed per unit time and the size and shape of the grains, the number can be appropriately determined according to the number, width, and shape of the chute grooves 146 of the chute 140.

  Furthermore, in the above-described example, the case where the contact image sensor is used as the CIS 232 for the visible light region and the CIS 234 for the near-infrared light region is shown, but another image sensor, a CMOS camera, a CCD camera, or the like may be used. Any sensor or camera may be used as long as it can detect the grain to be obtained and obtain a characteristic amount that can determine the quality of the grain such as transmittance and moisture content.

  Furthermore, in the above-described example, the case where a CMOS camera is used as the front CMOS camera 236 or the rear CMOS camera 238 is shown. However, a CCD camera or a contact image sensor may be used to detect falling grains. Any sensor or camera that can acquire a feature quantity that can determine grain quality such as reflectance and fluorescence can be used.

  In the example described above, the transmittance, reflectance, moisture content, fluorescence, and the like are used as the optical characteristics (features) that can determine the quality of the grain. However, any characteristic quantity that can determine the quality of the grain may be used.

  Further, in the above-described example, the case where the signal processing board 310 and the image processing board 320 are configured separately is shown, but they may be configured integrally. What is necessary is just to comprise suitably according to the apparatus which detects the fallen grain, and the feature-value to acquire. The overall configuration can be simplified. In the example described above, the air gun control board 330 is configured separately from the signal processing board 310 and the image processing board 320. However, the air gun control board 330 may be configured integrally with the signal processing board 310 and the image processing board 320. . Wiring work is unnecessary, and the configuration can be simplified.

  In the above-described example, the processing for removing the grains in which the bacteria have been generated is shown without determining the type of the bacteria in the grains. However, the type of bacteria may be determined based on the fluorescence wavelength to be detected, and the grains may be separated and removed according to the type of bacteria.

  Alternatively, the number of cereals in which bacteria are generated may be counted for each type of bacteria, and the number of cereals in which bacteria are generated may be displayed on a display such as the operation panel 160 according to the type of bacteria. A trend of the overall quality of the screened grain can be obtained.

<<<<< Details of this embodiment >>>>
As described above, the present invention has been described according to the present embodiment, but it should not be understood that the description and drawings constituting a part of this disclosure limit the present invention. As described above, the present invention naturally includes various embodiments and the like not described herein.

100 Conveyance system (movement adjustment unit)
DESCRIPTION OF SYMBOLS 120 Tank 130 Feeder 132 Upper end part 134 Lower end part 140 Chute 142 Upper end part 144 Lower end part 146 Chute groove 200 Optical system 210 Front side light source system 212 Front side RGB light emitting diode 214 Front side ultraviolet light emitting diode (deep ultraviolet light emitting diode)
216 Front infrared light emitting diode (near infrared light emitting diode)
220 Rear-side light source system 222 Rear-side RGB light-emitting diode 224 Rear-side ultraviolet light-emitting diode (deep ultraviolet light-emitting diode)
226 Rear infrared light emitting diode (near infrared light emitting diode)
230 Detection System 232 Visible Light Range CIS (Front CIS)
234 CIS for near infrared light region (rear CIS)
236 Front CMOS camera 238 Rear CMOS camera 300 Control processing system 310 Signal processing board 320 Image processing board 330 Air gun control board 340 Light source control device 400 Air gun drive system 410 Air gun 412 Valve

Claims (5)

A first light source unit that emits visible light, a second light source unit that emits infrared light, and a third light source unit that emits ultraviolet light, and visible light and red toward a moving object. Light source means for irradiating at least one of external light and ultraviolet light;
A first detection unit that detects visible light emitted from the first light source unit and applied to the object, and an infrared light that is emitted from the second light source unit and applied to the object are detected. Detection means comprising: a second detection unit; and a third detection unit that detects fluorescence emitted from the object based on ultraviolet light emitted from the third light source unit;
Based on the first suitability determination unit that determines whether the transmittance or reflectance of the object is appropriate based on the detection result of the first detection unit, and the detection result of the second detection unit A second suitability determination unit that determines whether or not the target object is a foreign object, and a third suitability determination that determines whether or not bacteria are generated in the target object based on a detection result of the third detection unit. A determination unit, and based on at least one determination result of determination results of the first suitability determination unit, the second suitability determination unit, and the third suitability determination unit, the moving object Pass / fail determining means for determining pass / fail;
A moving direction changing means for changing the moving direction of the object determined to be defective;
Light emission control for selecting at least one light source unit from among the first light source unit, the second light source unit, and the third light source unit, and controlling lighting, extinction, and emission intensity of the selected light source unit. A target object sorting apparatus comprising: means. A first light source unit that emits visible light, a second light source unit that emits infrared light, and a third light source unit that emits ultraviolet light, and visible light and red toward a moving object. Light source means for irradiating at least one of external light and ultraviolet light;
A first detection unit that detects visible light emitted from the first light source unit and applied to the object, and an infrared light that is emitted from the second light source unit and applied to the object are detected. Detection means comprising: a second detection unit; and a third detection unit that detects fluorescence emitted from the object based on ultraviolet light emitted from the third light source unit;
Based on the first suitability determination unit that determines whether the transmittance or reflectance of the object is appropriate based on the detection result of the first detection unit, and the detection result of the second detection unit A second suitability determination unit that determines whether or not the target object is a foreign object, and a third suitability determination that determines whether or not bacteria are generated in the target object based on a detection result of the third detection unit. A determination unit, and based on at least one determination result of determination results of the first suitability determination unit, the second suitability determination unit, and the third suitability determination unit, the moving object Pass / fail determining means for determining pass / fail;
Moving direction changing means for changing the moving direction of the object determined to be defective, the moving direction changing means,
A fluid discharge device for discharging a fluid toward a moving object;
Timing of fluid discharge from the fluid discharge device according to at least one determination result of the determination result of the first suitability determination unit, the determination result of the second suitability determination unit, and the determination result of the third suitability determination unit A discharge timing determination unit for determining a target object. The first light source unit is a white light source composed of light sources of a plurality of colors that can independently control light emission,
The object selection apparatus according to claim 1, wherein the light emission control unit controls lighting, extinction, and light emission intensity of the light sources of the plurality of colors independently of each other. Before SL plurality of colors, red, blue, object sorting apparatus according to claim 3 is green. The third detection unit detects visible light emitted from the first light source unit and applied to the object,
The pass / fail determination means includes a fourth suitability determination unit that determines whether the reflectance or transmittance of the target object is appropriate based on the detection result of visible light by the third detection unit. The target object sorting apparatus according to claim 1 or 2.