KR20230080647A - An Apparatus for Sorting Agricultural Product and a Method therefor - Google Patents

Abstract

The present invention is an agricultural product sorting device according to an embodiment of the present invention, a measuring unit for measuring the size or mass of agricultural products; A light analyzer having a light source and an optical sensor, but optically measuring quality information of agricultural products while the agricultural products pass between the light source and the optical sensor; a conveyor unit for transporting the agricultural products from the measurement unit to the optical analysis unit; And a central control unit for instructing the light analyzer to control at least one of a distance between the light source and the agricultural products and a distance between the optical sensor and the agricultural products using the measurement information of the measurement unit; It includes a light source position driver for adjusting the position and an optical sensor position driver for adjusting the position of the optical sensor, and the central control unit is configured when the agricultural products passing through the measurement unit pass between the light source and the optical sensor of the optical analysis unit. It is characterized in that the position of at least one of the light source and the optical sensor is controlled to maintain at least one of a distance between the light source and the agricultural product and a distance between the optical sensor and the agricultural product at a predetermined distance.

Description

Apparatus for Sorting Agricultural Product and a Method therefor}

The present invention relates to an apparatus and method for sorting agricultural products, and more particularly, when there is a change in size between agricultural products of the same kind, a sensor for determining the quality level of agricultural products having a significant change in size moves a certain distance from the agricultural products. It relates to an agricultural product sorting device and sorting method that can be moved to maintain.

In general, in a system that determines and sorts the quality of agricultural products such as fruits, non-destructive optical analysis is performed on agricultural products to measure sugar content. In this process, the optical analysis unit of the sorting system has an optical transmitter and a light receiver, A detection device separated by a predetermined distance and a signal processing device for signal processing information detected by the detection device are provided.

A conventional optical analysis type agricultural product sorting device uses an optical analysis detection device with a fixed distance from agricultural products, ranging from relatively small agricultural products to fairly large agricultural products, even if they are of the same kind of agricultural products. photoanalyzed.

In addition, in the case of non-spherical long-shaped agricultural products, the distance between the agricultural products and the optical analysis device varies considerably depending on the position on the conveyor belt, and there is a problem in that the optical analysis error increases according to the distance.

In addition, although the size of the agricultural products to be inspected is a size that cannot pass through without interfering with the optical analysis device, there is a problem in that the agricultural products collide with the optical analysis device while passing through the optical analysis device, causing damage to the optical analysis device. .

In order to solve the problems of the prior art, the present invention applies an optical analysis device for analyzing the quality of agricultural products in a non-destructive manner to agricultural products to perform optical analysis, regardless of the size of the agricultural products. It is intended to provide an agricultural product sorting device capable of improving optical analysis accuracy by maintaining constant analysis conditions.

The present invention selects agricultural products that can improve optical analysis accuracy by adjusting the distance between a light source and an optical sensor, which are optical analysis elements to operate on agricultural products, in consideration of the skin thickness according to various types of agricultural products to be non-destructive optical analysis. We want to provide you with a device.

In the present invention, in adjusting the separation distance between a light source, an optical sensor, and agricultural products, when the separation distance is out of the control limit in the process of adjusting the separation distance, an apparatus for sorting agricultural products that can assist by changing the arrangement position of the light source and the optical sensor in a circular manner is provided. want to provide

In the present invention, in the continuous optical analysis of agricultural products, when it is determined that the time required for the movement of the light source and the optical sensor to perform optical analysis on the agricultural products will not be completed within the transport time of the agricultural products, the conveyor belt carrying the agricultural products It is intended to provide an agricultural product sorting device that allows agricultural products to be optically analyzed after the positional movement of the light source and the optical sensor is completed by adjusting the speed.

The present invention solves the problem of causing damage to the optical analysis device by colliding with the optical analysis device while passing the optical analysis device even though the size of the agricultural product to be inspected is a size that cannot pass through the optical analysis device without causing interference with the optical analysis device. It is intended to provide an agricultural product sorting device.

Agricultural products selection apparatus according to an embodiment of the present invention, a measuring unit for measuring the size or mass of agricultural products; A light analyzer having a light source and an optical sensor, but optically measuring quality information of agricultural products while the agricultural products pass between the light source and the optical sensor; a conveyor unit for transporting the agricultural products from the measurement unit to the optical analysis unit; And a central control unit for instructing the light analyzer to control at least one of a distance between the light source and the agricultural products and a distance between the optical sensor and the agricultural products using the measurement information of the measurement unit; It includes a light source position driver for adjusting the position and an optical sensor position driver for adjusting the position of the optical sensor, and the central control unit is configured when the agricultural products passing through the measurement unit pass between the light source and the optical sensor of the optical analysis unit. It is characterized in that the position of at least one of the light source and the optical sensor is controlled to maintain at least one of a distance between the light source and the agricultural product and a distance between the optical sensor and the agricultural product at a predetermined distance.

Here, controlling the position of at least one of the light source and the optical sensor in order to maintain at least one of the distance between the light source and the agricultural product and the distance between the optical sensor and the agricultural product at a predetermined distance allows the agricultural product to pass through the measuring unit. and is performed while reaching the light analyzer.

The light source position driver includes a light source support for supporting the light source, a light source guide rod for guiding the light source with respect to agricultural products, and a light source support actuator that is connected to the light source support and transports the light source support on the light source guide rod.

The optical sensor position driver is connected to an optical sensor support for supporting the optical sensor, an optical sensor guide rod for guiding the optical sensor with respect to agricultural products, and the optical sensor support, and transfers the optical sensor support on the optical sensor guide rod. It includes an optical sensor support actuator that does,

The light source guide rod and the optical sensor guide rod are rods extending in a straight line.

Optionally, the light source guide rod and the photosensor guide rod are curved rods.

The optical analyzer further includes a rotatable table on which the light source and the optical sensor are installed.

The table maintains at least one of the distance between the light source and the agricultural product and the distance between the optical sensor and the agricultural product at a predetermined distance when the agricultural product passing through the measuring unit passes between the light source and the optical sensor of the optical analysis unit. It is controlled to rotate by the central control unit.

The optical analyzer includes a table rotation driver for adjusting a rotation angle of the table.

The table is disposed below the conveyor belt of the conveyor unit to rotate.

Agricultural selection method according to an embodiment of the present invention comprises the steps of measuring the size or mass of agricultural products; A step of optically measuring the quality of agricultural products using a light source and an optical sensor, optically measuring quality information of agricultural products while the agricultural products pass between the light source and the optical sensor; Controlling at least one of a distance between the light source and the agricultural product and a distance between the optical sensor and the agricultural product using information on the size or mass of the measured agricultural product, wherein the controlling step is the position of the light source or adjusting the position of the optical sensor, wherein the adjusting step includes the distance between the light source and the agricultural product when the agricultural product passes between the light source and the optical sensor, and the optical sensor and the optical sensor. It is characterized in that the position of at least one of the light source and the optical sensor is controlled to maintain at least one of the distances between agricultural products at a predetermined distance.

The central control unit converts size information of the agricultural product from mass information measured by the measurement unit. The measuring unit may collect information about the position of agricultural products placed on the conveyor unit.

The central control unit calculates the maximum horizontal size and the minimum horizontal size of agricultural products based on the information of the measuring unit, and determines whether the optical analyzer performs optical analysis on the maximum horizontal size of agricultural products and optical analysis on the minimum horizontal size of agricultural products. The position of at least one of the light source and the optical sensor of the light analyzer is determined by deciding whether to perform optical analysis on the horizontal size of the value between the maximum horizontal size and the minimum horizontal size of the agricultural product.

The rotational movement of the table and the linear positional movement of the light sensor or light source are performed simultaneously. The light source and the optical sensor are disposed such that an incident angle at which light emitted from the light source is received by the optical sensor is constant. The light source support may be changed to vary the height of the light source. The photosensor support can be changed to change the height of the photosensor. The table rotates within a range where the light source position driving unit and the light source do not collide with the conveyor unit or the agricultural products, and the optical sensor position driving unit and the optical sensor rotate within a range where they do not collide with the conveyor unit or the agricultural products.

As described above, according to the present invention, the following effects can be implemented.

First, in performing optical analysis by applying an optical analysis device to analyze the quality of agricultural products in a non-destructive way to agricultural products, regardless of the size of the agricultural products, the optical analysis conditions between the optical analysis device and the agricultural products are kept constant to improve the optical analysis accuracy. can improve

Second, the present invention can improve the optical analysis accuracy by adjusting the distance between the light source and the optical sensor, which are optical analysis elements to operate on agricultural products, considering the thickness of the skin according to various types of agricultural products to be non-destructive optical analysis. .

Third, in the present invention, in adjusting the separation distance between the light source, the optical sensor, and agricultural products, even when the distance is out of the control limit in the process of adjusting the separation distance, the arrangement position of the light source and the optical sensor can be circularly changed to respond auxiliaryly.

Fourth, in the present invention, in the continuous optical analysis of agricultural products, when it is determined that the time required for the movement of the light source and the optical sensor to perform optical analysis on the agricultural products is not completed within the transport time of the agricultural products, the conveyor carrying the agricultural products By adjusting the speed of the belt, the agricultural products can be optically analyzed after the movement of the light source and the optical sensor is finished.

Fifth, the present invention passes through the optical analysis device even though the size of the agricultural product to be inspected is a size that cannot pass through without interfering with the optical analysis device, and the agricultural product collides with the optical analysis device, causing damage to the optical analysis device. can solve

1 is a perspective view of a process of sorting agricultural products in an apparatus for sorting agricultural products according to an embodiment of the present invention.
Figure 2 is a block diagram of an agricultural product selection device according to an embodiment of the present invention.
Figure 3 is a perspective view of the optical analysis unit of the agricultural products sorting device according to an embodiment of the present invention.
Figure 4 is a plan view of the optical analysis unit of the agricultural products sorting device according to an embodiment of the present invention.
5A to 5D are explanatory diagrams showing the state in which the optical analysis unit operates according to each size of agricultural products in the optical analysis unit of the agricultural product sorting device according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The following description and accompanying drawings are for understanding the operation according to the present invention, and parts that can be easily implemented by those skilled in the art may be omitted.

In addition, this specification and drawings are not provided for the purpose of limiting the present invention, and the scope of the present invention should be defined by the claims. The terms used in this specification should be interpreted as meanings and concepts corresponding to the technical idea of the present invention so as to most appropriately express the present invention.

1 is a perspective view of a process of sorting agricultural products in an apparatus for sorting agricultural products according to an embodiment of the present invention, and FIG. 2 is a block diagram of an apparatus for sorting agricultural products according to an embodiment of the present invention.

Referring to Figure 1, the method for selecting agricultural products according to an embodiment of the present invention includes the steps of measuring the size or mass of agricultural products (S1); Step (S2) of moving to the step of optical analysis to optically analyze agricultural products; A step of optically measuring the quality of agricultural products using a light source and an optical sensor, including optically measuring quality information of agricultural products while the agricultural products pass between the light source and the optical sensor (S5).

After measuring the size or mass of the agricultural product (S1), at least one of a distance between the light source and the agricultural product and a distance between the optical sensor and the agricultural product is calculated using information on the measured size or mass of the agricultural product. Step (S3) is performed.

Subsequently, a step (S4) of adjusting the position of the light source or the position of the optical sensor is performed, and this adjusting step is performed when the agricultural products pass between the light source and the optical sensor. A position of at least one of the light source and the optical sensor is controlled to maintain at least one of a distance between the agricultural products and a distance between the optical sensor and the agricultural products at a predetermined distance.

Here, calculating the distance between the light source and the optical sensor and the agricultural products in order to maintain at least one of the distance between the light source and the agricultural products and the distance between the optical sensor and the agricultural products at a predetermined distance (S3) and the light source and the optical sensor The step (S4) of controlling the position of the agricultural product is performed during the step (S2) of transferring the agricultural product to the step of optical analysis after the step of measuring the size or mass of the agricultural product.

The agricultural product selection device of the present invention for performing the agricultural product selection method is, as shown in FIG. 2, a measuring unit 10 for measuring the size or mass of agricultural products; A light analyzer 30 having a light source 33 and an optical sensor 35 and optically measuring quality information of agricultural products while the agricultural products pass between the light source and the optical sensor; a conveyor unit 40 for transporting the agricultural products from the measurement unit 10 to the optical analysis unit; and a central control unit 20 instructing the light analyzer to control at least one of a distance between the light source and the agricultural products and a distance between the optical sensor and the agricultural products using the measurement information of the measurement unit.

The measuring unit 10 may measure the weight of agricultural products by a weight sensor disposed at the bottom while being placed on a tray and being transported by a conveyor belt. Optionally, the measurement unit 10 may measure the external size of agricultural products placed on the tray and transported through a vision device or the like.

Here, if the information measured by the measurement unit 10 is external size information, the central control unit 20 can directly use the corresponding size information to calculate the distance between the light source or the optical sensor and the produce. Optionally, when the information measured by the measuring unit 10 is not the external size information of the agricultural product but the mass information, the central control unit 20 determines the amount of the agricultural product from the mass information of the agricultural product measured by the measuring unit 10. Convert size information.

To this end, the central control unit 20 stores information on the average value of the size according to the type/mass of the agricultural product in advance in a memory, and when the agricultural product of the corresponding mass is measured, predetermined size information can be given to the agricultural product. .

The predetermined size information varies depending on the type of agricultural products. In the case of spherical agricultural products, the average diameter value may correspond to the external size information, and in the case of long-shaped agricultural products, the information of the maximum diameter and minimum diameter may correspond to the external size information. It may correspond to enemy size information.

On the other hand, after the agricultural products pass through the measurement unit 10, when the agricultural products are optically analyzed in the optical analysis unit 30, in order to match the mass, size information and optical analysis information with each other, the central control unit 20 Corresponding information is matched by synchronizing the transport path of the agricultural products transported from the conveyor unit 40, and the matched corresponding information is transmitted to a discharge unit (not shown) that analyzes and classifies the agricultural products and discharges them.

In addition, the measurement unit 10 may collect information about the posture of the agricultural products P: FIG. 3 placed on the tray 50: FIG. 3 in the conveyor unit 40 . In the case of circular or substantially circular agricultural products, the seating posture of the agricultural products is not important, but in the case of long agricultural products, the light source 33 and the optical sensor in the light analyzer 30 depend on the position in which the agricultural products are placed on the tray When passing between (35), the distance between the agricultural products (P) and the light source 33 and the distance between the agricultural products (P) and the light sensor 35 are greatly affected.

Therefore, in preparation for the case of asymmetric long-shaped agricultural products, the measurement unit 10 according to an embodiment of the present invention can also acquire information on the posture of agricultural products placed on the tray, and the central control unit 20 Based on the attitude information, the distance between the produce and the light source or optical sensor is calculated.

Referring to FIG. 2 , the light analyzer 30 includes a light source position driver 32 for adjusting the position of the light source 33 and an optical sensor position driver 34 for adjusting the position of the optical sensor 35. include

3 is a perspective view of an optical analyzer of an apparatus for sorting agricultural products according to an embodiment of the present invention, and FIG. 4 is a plan view of an optical analyzer of an apparatus for sorting agricultural products according to an embodiment of the present invention.

As shown in FIGS. 2 to 4 , the central control unit 20 determines that agricultural products that have passed through the measurement unit 10 are placed between the light source 33 and the optical sensor 35 of the optical analysis unit 30. At least one of the light source and the optical sensor to maintain at least one of the distance between the light source 33 and the agricultural product P and the distance between the optical sensor 35 and the agricultural product at a predetermined distance when passing through control the position

Again, with reference to FIGS. 2 to 4 , a detailed structure of the light analyzer 200 will be described.

The light analyzer 30 is disposed downstream of the measurement unit 10 and is disposed on the traveling path of the conveyor belt 42 . The light analyzer 30 includes a light source 33 disposed on one side of both sides divided in the conveying direction of the conveyor belt 42 and an optical sensor 35 disposed on the other side facing one side in the conveying direction. includes

In the drawings, a case in which there is one light source and one optical sensor is shown, but is not necessarily limited thereto, and a number of light sources and a plurality of optical sensors corresponding thereto may be provided as necessary.

The light source position driver 32 is connected to a light source support 33c supporting the light source 33, a light source guide rod 33a guiding the light source 33 with respect to agricultural products, and the light source support 33c. and a light source support actuator 33b which slides on the light source guide rod 33a and transports the light source support 33c.

Correspondingly, the optical sensor position driver 34 includes an optical sensor support 35c supporting the optical sensor 35 and an optical sensor guide rod 35a guiding the optical sensor 35 with respect to the agricultural product P. and an optical sensor support actuator 35b that is connected to the optical sensor support 35c and slides on the optical sensor guide rod 35a to transfer the optical sensor support 35c.

The light source and the optical sensor are arranged such that an incident angle at which the light irradiated from the light source 33 is received by the optical sensor 35 is constant. 3 and 4, the light source 33 and the optical sensor 35 are illustrated as being disposed on a straight line with the crops interposed therebetween, but are not necessarily limited thereto, and the light source 33 for the agricultural products P When the irradiated light passes through agricultural products and reaches the optical sensor 35, it may reach the optical sensor 35 along a path forming a predetermined angle rather than a straight line.

The light received by the optical sensor 35 is processed and determined by a separate optical analysis device to determine quality levels such as sugar content of agricultural products.

Meanwhile, the light source support 33c may be changed to change the height of the light source 33 . Similarly, the photosensor support 35c can be changed so that the height of the photosensor 35 can be varied.

Referring to FIGS. 3 and 4 , the light source guide rod 33a and the light sensor guide rod 35a are rods extending in a straight line. Optionally, although not shown in the drawings, the light source guide rod and the optical sensor guide rod may be rods extending in a curved line. When the light source guide rod and the optical sensor guide rod are curved, it is possible to implement a disposition relationship between the light source and the optical sensor, which cannot be realized when the guide rod is straight.

Referring to FIGS. 3 and 4 , the light analyzer 30 has the light source 33 and the optical sensor 35 installed on a disk-shaped table surface 37a, but the table itself can rotate ( 38) is further included.

The table 38 is the light source 33 when the agricultural product P passing through the measurement unit 10 passes through the shortest distance between the light source 33 of the light analyzer 30 and the optical sensor 35. And rotated by the central control unit 20 to maintain at least one of the distance L1 between the agricultural products P and the distance S1 between the optical sensor 35 and the agricultural products P at a predetermined distance. controlled

In addition, the table 37 is disposed below the conveyor belt 42 of the conveyor unit 40 to rotate. The rotation center of the table 37 may be disposed at a predetermined position among the widths of the conveyor belt 42, and aligned with the center of the width of the conveyor belt.

To rotate the table 37 , the light analyzer 30 includes a table rotation driver 36 for adjusting a rotation angle of the table 37 . The rotation speed and rotation angle of the table rotation driving unit 36 are controlled by the central control unit 20 .

In order to secure a predetermined distance for agricultural products, the table rotation movement and the linear position movement of the light sensor or light source may be performed simultaneously or independently.

The table 37 rotates within a range in which the light source position driving unit 32 and the light source 33 do not collide with the conveyor unit 40 or the agricultural product P, and the light sensor position driving unit 34 and The optical sensor 35 rotates within a range that does not collide with the conveyor unit 40 or the agricultural product P.

5A to 5D are explanatory diagrams showing the state in which the optical analysis unit operates according to each size of agricultural products in the optical analysis unit of the agricultural product sorting device according to an embodiment of the present invention.

5A to 5D, the central processing unit 20 calculates the maximum horizontal size and the minimum horizontal size of agricultural products based on the measurement information of the measurement unit 10, and the optical analysis unit 30 Whether to perform optical analysis on the maximum horizontal size of agricultural products, whether to perform optical analysis on the minimum horizontal size of agricultural products, or whether to perform optical analysis on the horizontal size of values between the maximum horizontal size and minimum horizontal size of agricultural products. and controls the position of at least one of the light source and the optical sensor of the light analyzer.

In FIG. 5A, when the diameter through the optical analysis unit of agricultural products is d1 smaller than the normal and average predetermined diameter d of FIG. 4, the light source 33 guides the light source so that the shortest distance between the light source 33 and the agricultural products P becomes L1. The rod 33a slides toward the agricultural products, and the optical sensor 35 slides toward the agricultural products on the optical sensor guide rod 35a so that the shortest distance between the optical sensor 35 and the agricultural products P becomes S1. show

In FIG. 5B , when the diameter of the light analyzer passing through the agricultural product is d2 greater than d in FIG. , and the optical sensor 35 slides away from the agricultural products on the optical sensor guide rod 35a so that the shortest distance between the optical sensor 35 and the agricultural products P becomes S1.

In the case of FIG. 5C, in the case of d3, which is the maximum diameter of the optical analysis unit of the agricultural product in the shape of the agricultural product that is not spherical, the light source 33 is the light source guide rod ( 33a), the optical sensor 35 slides on the optical sensor guide rod 35a so that the shortest distance between the optical sensor 35 and the agricultural products P becomes S1, and slides away from the agricultural products.

In the case of FIG. 5D, in non-spherical agricultural products, the maximum diameter through the light analysis unit of the agricultural products is large enough to exceed the maximum distance between the light source 33 and the optical sensor 35, or the maximum separation distance between the light source 33 and the optical sensor 35 Even if it is difficult to secure the predetermined optical analysis distance of L1 and S1 for agricultural products, the table 37 is rotated so that the light source 33 and the optical sensor 35 set the predetermined optical analysis distance between L1 and S1 between agricultural products. shows the situation in which it is arranged to hold Rotation of the table 37 may be performed to find the optimal optical analysis point for the produce.

The apparatus for sorting agricultural products according to an embodiment of the present invention has a configuration in which the positions of the light source and the optical sensor are controlled in order to control the distance between the light source and the agricultural product and the distance between the agricultural product and the optical sensor to a predetermined distance. It is not limited, and in the agricultural products sorting device according to another embodiment of the present invention, the positions of the light source and the optical sensor may be controlled to control the internal distance through which the light irradiated from the light source passes through the inside of the agricultural products.

Although specific embodiments have been described in detail in the invention, this invention is not limited thereto, and this invention can be practiced with various modifications by those skilled in the art to which the invention belongs, and these modifications are within the scope of the invention. included in

Regarding interpretation, it can be understood that this invention can be embodied in a modified form to the extent that it does not deviate from the essential characteristics of this invention.

The disclosed embodiments are to be considered in an illustrative rather than a limiting sense. The scope of this invention is shown in the claims rather than the foregoing description, and differences within the equivalent scope should be construed as being included in this invention.

In the case of a term whose meaning is not particularly defined in the present invention, it should be interpreted broadly in a general sense, and should be interpreted as including other terms in an equivalent range.

100: agricultural products sorting device
10: measuring unit 20: central control unit
30: light analysis unit 40: conveyor unit

Claims (11)

Measuring unit for measuring the size or mass of agricultural products;
A light analyzer having a light source and an optical sensor, but optically measuring quality information of agricultural products while the agricultural products pass between the light source and the optical sensor;
a conveyor unit for transporting the agricultural products from the measurement unit to the optical analysis unit; and
A central control unit instructing to control at least one of a distance between the light source and the agricultural product of the light analyzer and a distance between the optical sensor and the agricultural product using the measurement information of the measurement unit; including,
The light analysis unit includes a light source position driving unit for adjusting the position of the light source and an optical sensor position driving unit for adjusting the position of the optical sensor,
The central control unit maintains at least one of a distance between the light source and the agricultural product and a distance between the optical sensor and the agricultural product at a predetermined distance when the agricultural product that has passed through the measuring unit passes between the light source and the optical sensor of the light analyzer. Produce sorting device, characterized in that for controlling the position of at least one of the light source and the optical sensor in order to. According to claim 1,
Controlling the position of at least one of the light source and the optical sensor in order to maintain at least one of the distance between the light source and the agricultural product and the distance between the optical sensor and the agricultural product at a predetermined distance allows the agricultural product to pass through the measuring unit to Agricultural products sorting device, characterized in that performed while reaching the optical analysis unit. According to claim 2,
The light source position driver includes a light source support for supporting the light source, a light source guide rod for guiding the light source with respect to agricultural products, and a light source support actuator connected to the light source support and transporting the light source support on the light source guide rod. Characteristic agricultural product sorting device. According to claim 3,
The optical sensor position driver is connected to an optical sensor support for supporting the optical sensor, an optical sensor guide rod for guiding the optical sensor with respect to agricultural products, and the optical sensor support, and transfers the optical sensor support on the optical sensor guide rod. Agricultural products sorting device comprising an optical sensor support actuator to do. According to claim 4,
The light source guide rod and the optical sensor guide rod are agricultural products sorting device, characterized in that the rod extending in a straight line. According to claim 5,
The light source guide rod and the optical sensor guide rod are agricultural products sorting device, characterized in that the rod extending in a curved line. According to claim 1,
The optical analyzer further comprises a rotatable table on which the light source and the optical sensor are installed. According to claim 7,
The table maintains at least one of the distance between the light source and the agricultural product and the distance between the optical sensor and the agricultural product at a predetermined distance when the agricultural product passing through the measuring unit passes between the light source and the optical sensor of the optical analysis unit. Agricultural products sorting device, characterized in that controlled to rotate by the central control unit. According to claim 8,
The optical analysis unit comprises a table rotation driver for adjusting a rotation angle of the table. According to claim 9,
The table is agricultural product sorting device, characterized in that arranged on the lower side of the conveyor belt of the conveyor unit to rotate. Measuring the size or mass of produce;
A step of optically measuring the quality of agricultural products using a light source and an optical sensor, optically measuring quality information of agricultural products while the agricultural products pass between the light source and the optical sensor;
Controlling at least one of a distance between the light source and the agricultural product and a distance between the optical sensor and the agricultural product using information on the size or mass of the measured agricultural product,
The controlling step includes adjusting the position of the light source or adjusting the position of the photosensor,
The adjusting step may include maintaining at least one of a distance between the light source and the agricultural product and a distance between the optical sensor and the agricultural product at a predetermined distance when the agricultural product passes between the light source and the optical sensor. and controlling the position of at least one of the optical sensors.

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