JP2006212475A - Apparatus for judging internal quality of farm product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for judging the internal quality of a farm product, in which only the light to be emitted from the farm product can surely be received with simple constitution to improve the measurement precision and which can prevent the erroneous discharge of the farm product by eliminating the drop or displacement of the product under conveyance. <P>SOLUTION: The apparatus for judging the internal quality of the farm product is constituted so that the farm product to be conveyed in a line by a conveying means is irradiated with the light from a light projecting means, the light transmitting the farm product is received by a light receiving means and the internal quality of the farm product is judged on the basis of the received light. A plurality of light shielding bodies are arranged between the light receiving means and the farm product at predetermined intervals in the positions except for the opposed position of the light receiving means to the farm product in order to prevent diffused external light except the light transmitting the farm product from entering the light receiving means. The light projecting means emits light toward the side face of the farm product to be conveyed by the conveying means and the light receiving means receives the light transmitting the farm product from above. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an agricultural product internal quality judging device preferably used in a sorting and packaging facility (fruit selection field) for sorting and shipping agricultural products such as peaches, pears, apples, tomatoes and tangerines.

Conventionally, in agricultural product sorting and packaging facilities, agricultural products conveyed in a row on a conveyor are irradiated with light by a halogen lamp or laser, and the transmitted light or reflected light of the agricultural product is measured to determine the internal quality of the agricultural product. For example, an internal quality determination apparatus disclosed in Patent Document 1 is known. The article rotation measurement device (internal quality determination device) disclosed in Patent Document 1 measures different parts by stopping rotation of fruit vegetables at an arbitrary angle, and the light transmitted through the fruit is synchronized with the fruit. The light is received through the light receiving window of the light shielding pad that moves.
JP 2001-259535 A

  However, in such an internal quality judgment device, a large number of light-shielding pads are conveyed in synchronization with the vegetable products and the transmitted light of the vegetable products is received, so a large number of light-shielding pads are required, and the device is expensive. In addition, the structure of the apparatus is complicated, for example, a rotation mechanism of the holding body is required because the holding body for holding the fruit and vegetables rotates and the fruit and vegetable held by the holding body is in contact with the light shielding pad. Has a point. In addition, since operations such as rotation of fruits and vegetables and contact with the light-shielding pad are performed during the conveyance, the accuracy of measurement accuracy is inferior, such as the fruits and vegetables being shaken or falling in the worst case during each operation. For example, it has a problem that it is not suitable for high-speed processing.

  The present invention has been made in view of such circumstances, and the object thereof is to reliably receive only transmitted light emitted from agricultural products with a simple configuration, improve measurement accuracy, and perform transportation. An object of the present invention is to provide an agricultural product internal quality judgment device capable of preventing a fall or misalignment of agricultural products and preventing discharge errors and the like.

  In order to achieve such an object, the invention according to claim 1 of the present invention is directed to irradiating the agricultural products conveyed in a line by the conveying means with the light projecting means and receiving the light transmitted through the agricultural products by the irradiation with the light receiving means. In the agricultural product internal quality determination device that determines the internal quality of the agricultural product based on the received light, in order to prevent disturbance light other than the transmitted light transmitted through the agricultural product from entering the light receiving means, A plurality of light-shielding bodies are provided at predetermined intervals in a range excluding a position where the light receiving unit and the agricultural product face each other, and between the light receiving unit and the agricultural product.

  In the invention according to claim 2, the light projecting unit emits light from the side of the agricultural product conveyed by the conveying unit, and the light receiving unit is irradiated by the light projecting unit and transmitted through the agricultural product. It is comprised so that light may be received from the upper direction of agricultural products. The invention described in claim 3 is characterized in that the light-shielding body is provided in a dark box, and the invention described in claim 4 is characterized in that the dark box is formed in a cylindrical shape and extends in the longitudinal direction of the dark box. A plurality of light shielding bodies are provided.

  Furthermore, the invention according to claim 5 is characterized in that the light shielding body is a brush, and the invention according to claim 6 is characterized in that the light shielding body is a cloth. The invention according to claim 7 is characterized in that the light shielding body is formed in a spiral shape, and the invention according to claim 8 is formed by a plurality of light shielding bodies having openings. The opening is formed such that the side close to the light receiving means has a small diameter and the side close to the agricultural product has a large diameter.

  Furthermore, in the invention according to claim 9, the light shield is composed of a plurality of light shields each having an opening, and a protrusion projecting toward the produce side is provided at a position surrounding the opening of the light shield opposite to the produce. It is formed. The invention according to claim 10 is characterized in that a plurality of the protrusions are concentrically formed with different diameters with respect to the opening.

  According to the first aspect of the present invention, a plurality of light blocking bodies are provided at predetermined intervals between the light receiving means and the agricultural product in a range excluding the position where the light receiving means and the agricultural product face each other. Since disturbance light other than the transmitted light that has passed through the agricultural product is prevented from entering, a simple configuration of arranging a plurality of light shields at the measurement position allows the transmitted light of the agricultural product to be reliably received by the light receiving means. The quality measurement accuracy can be improved, and the light shielding body can be placed regardless of the transport operation of the agricultural product being transported, and it is possible to prevent the fall and misalignment of the agricultural product being transported and reliably prevent discharge mistakes, For example, it can easily cope with high-speed processing.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the light projecting means emits light from the side of the agricultural product conveyed by the conveying means, and the light receiving means projects the light. Since the light that has been irradiated by the means and transmitted through the agricultural products is received from above the agricultural products, the light receiving means can receive the transmitted light of, for example, the deciduous portion of the agricultural products, and accurately measure cavities and the like that are likely to occur in the deciduous portion. Can do.

  Further, according to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, since the light shielding body is provided in the dark box, for example, the function of the light shielding body is provided on the upper and lower side walls of the dark box. The structure of the light shielding body itself can be simplified, and the apparatus can be formed at low cost.

  According to the invention of claim 4, in addition to the effect of the invention of claim 3, the dark box is formed in a cylindrical shape, and a plurality of light blocking bodies are provided in the longitudinal direction inside the dark box. In addition, the dark box itself can be formed in a small size and can be arranged compactly on the conveying means.

  Further, according to the invention described in claim 5, in addition to the effects of the invention described in claims 1 to 4, since the light shielding body is a brush, disturbance light can be reliably shielded by using a simple brush with a predetermined form. Thus, the measurement accuracy can be further improved.

  Further, according to the invention described in claim 6, in addition to the effects of the invention described in claims 1 to 4, since the light shielding body is a cloth, disturbance light can be reliably shielded by using a simple cloth with a predetermined shape. Thus, the measurement accuracy can be further improved.

  According to the invention described in claim 7, in addition to the effects of the invention described in claims 1 to 6, since the light shielding body is formed in a spiral shape, a plurality of light shielding plates are provided along the spiral direction. It can be easily arranged in a state of being integrated at intervals, and disturbance light can be shielded more reliably.

  According to the invention described in claim 8, in addition to the effects of the invention described in claims 1 to 7, the light shield is formed of a plurality of light shields having openings, and the inner diameter of the openings is close to the light receiving means. Since the side close to the agricultural product is formed with a large diameter, the transmitted light of the agricultural product can be reliably taken in from the large-diameter opening, and the disturbance light can be reliably blocked by the small-diameter opening, and the transmitted light is further reduced by the light receiving means. It is possible to reliably receive light and improve measurement accuracy.

  Furthermore, according to the invention described in claim 9, in addition to the effects of the invention described in claims 1 to 8, the light shield is composed of a plurality of light shields having openings, and the openings of the light shields facing the agricultural products are provided. Since the protruding portion that protrudes on the agricultural product side is formed at the enclosed position, direct light or disturbance light from the light projecting means is reflected by the protruding portion to avoid the light reaching the opening of the light shielding body. It is possible to further improve the measurement accuracy by further reliably receiving the transmitted light by the light receiving means.

  According to the invention of claim 10, in addition to the effect of claim 9, the plurality of protrusions are formed concentrically with different diameters with respect to the opening of the light shielding body. Light and disturbance light can be prevented from reaching the opening of the light blocking body, and the light receiving means can more reliably receive the transmitted light, thereby further improving the measurement accuracy.

Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
1 and 2 show an embodiment of an internal quality judgment device according to the present invention. In FIG. 1, an internal quality determination device 1 is arranged at a stage subsequent to a measuring unit 3 arranged at a measurement position of a conveyor 2 (conveying means) having a bucket 2 a and a light receiver 3 b (light receiving means) of the measuring unit 3. The spectroscope 4 and the detection device 5, and the control device 6 disposed at the subsequent stage of the detection device 5 are included.

  As described later, the measuring unit 3 is configured so that a projector 3a (projecting means) and a light receiver 3b are paired and opposed to the transport conveyor 2 to perform measurement by the light projector 3a and the light receiver 3b. Is set so as to cross a substantially intermediate position of the bucket 2a of the transport conveyor 2 in the transport direction A perpendicularly to the transport direction A. The spectroscope 4 splits the optical information obtained by the measuring unit 3, and the detection device 5 converts the optical information split by the spectroscope 4 into an electrical signal and outputs it to the control device 6. It is configured.

  The control device 6 includes a calculation means 7 for calculating an electric signal related to a predetermined internal quality from the electric signal obtained by the detection device 5, a determination device 8 for determining information calculated by the calculation means 7, Comprehensive determination device 9 that comprehensively determines the overall internal quality of the agricultural product by comparing the information determined by determination device 8 with information such as a reference value preset in setting means 10 and obtained by this comprehensive determination device 9 Output means 11 for outputting the determined determination information to the discharge device 12, etc., and these are constructed in a microcomputer, for example.

  The control device 6 is connected to a display means 13 such as a CRT or a liquid crystal display, etc., and the display means 13 displays information relating to the internal quality of agricultural products determined by the comprehensive determination device 9. It has come to be. Further, the output means 11 of the control device 6 is connected to a discharge device 12 provided on the transport conveyor 2 and a clock signal transmitter 14 provided on the transport conveyor 2. The discharge device 12 corresponding to the quality information determined by the comprehensive determination device 9 operates in synchronization with the signal from the signal transmitter 14.

  And the said measurement part 3 is comprised as shown to (a) or (b) of FIG. That is, in the measuring unit 3 shown in FIG. 2A, two light projectors 3a and one light receiver 3b are arranged above the transport conveyor 2, and the two light projectors 3a are apples as agricultural products. The optical path L is set so as to be substantially L-shaped by being arranged in a so-called horizontal-upper arrangement in which the light receivers 3b are arranged opposite to each other with the W interposed therebetween. At this time, the light irradiation position of each projector 3a with respect to the apple W is set at a substantially equator portion of the apple W, and the light receiving position is transmitted through, for example, the inflection portion above the substantially equator portion of the apple W on the bucket 2a. It is set to receive transmitted light.

  In addition, a dark box 17 constituting a light shielding body is disposed below the light receiver 3b of the measuring unit 3. The dark box 17 is formed in a substantially flat and rectangular shape in cross section with two upper and lower plate-shaped light shields 17a and side walls 17b connecting the outer peripheral edge portions of the respective plate-shaped light shields 17a in the vertical direction. Each plate-shaped light shield 17a is formed with an opening 18 having the same inner diameter that coincides with the light receiver 3a in the vertical direction. The dark box 17 irradiates the substantially equatorial portion of the apple W from the projector 3a, and the reflected light (disturbance light) or direct light reflected upward on the surface of the apple W is received by the light receiver 3b. The size and the like are set so as to have a blocking function, and the inner diameter of the opening 18 is substantially the same as the outer diameter of the light receiving portion of the light receiver 3b so that the light receiver 3b can efficiently receive the transmitted light. The same inner diameter is set.

  On the other hand, the measuring section 3 shown in FIG. 2B has three plate-shaped light shielding bodies 17a in which dark boxes 17 are stacked vertically at a predetermined interval, and each plate-shaped light shielding body 17a has an opening 18 having the same inner diameter. The other portions are provided in the same manner as the dark box 17 in FIG. 2 (a). That is, in the light shield shown in FIG. 2, a plurality of plate-like light shields 17a of the dark box 17 are stacked in a vertical direction at a predetermined interval, and the light shields 3b of each plate-like light shield 17a are opposed to each other in the vertical direction. Openings 18 having the same inner diameter are provided. In the measurement unit 3, the opening 18 provided in the four plate-shaped light shields 17a of the dark box 17 may be formed with a small diameter on the light receiver 3b side and a large diameter on the apple W side.

  Next, an example of operation | movement of the internal quality determination apparatus 1 comprised in this way is demonstrated. First, the apples W are manually or automatically placed one by one in a state where the inflection portion is positioned on the bucket 2 a on the starting end side of the transport conveyor 2, and transported to the downstream side of the transport conveyor 2. When the apple W on the bucket 2a reaches the position of the measuring unit 3 by this conveyance, the light emitted from the two projectors 3a of the measuring unit 3 is applied to the substantially equator of the apple W on the bucket 2a. The irradiated light is transmitted from the equator portion to the upper inflection portion by the light path L, and the transmitted light is received by the light receiver 3b.

  When the transmitted light is received by the light receiver 3b, the light shield (dark box 17) is disposed between the apple W and the light receiver 3b, so that the two projectors 3a face the conveying direction A of the apple W. Even if the light applied to the surface to be reflected is reflected upward or laterally on the surface of the apple W, the reflected light is not shielded by the plate-shaped light shields 17a of the dark box 17 and enters the light receiver 3b. In addition, the transmitted light that has been transmitted upward from the inferior part of the apple W passes through the openings 18 of the plate-shaped light shielding body 17a of the dark box 17 disposed above, and is received by the light receiver 3. At this time, only the transmitted light that does not include disturbance light that has passed through all the openings 18 of the two or three plate-shaped light shields 17a arranged at predetermined intervals in the vertical direction is received. .

  Then, the optical information received by the light receiver 3b is input to the calculation means 7 and the determination device 8 of the control device 6 through the spectroscope 4 and the detection device 5, and the internal quality such as the presence or absence of a cavity failure of the infarct portion. Is determined. For the apple W whose internal quality has been determined, the determination information is encoded by, for example, the determination device 8 and input to the comprehensive determination device 9, and compared with the reference information stored in the setting means 10 by the determination device 9. Or the total internal quality of the apple W is determined by comparison with internal quality information or the like determined by another determination device (not shown). Then, the apple W whose overall internal quality has been determined is operated by a predetermined discharge device 12 in response to a signal from the output means 11 of the control device 6 based on the determination result, whereby the corresponding discharge device of the conveyor 2 It will be discharged and pooled on a drawer conveyor 19 (see FIG. 1) arranged at 12 portions.

  Thus, in the internal quality determination device 1 of the above embodiment, the measuring unit 3 having the light projector 3a and the light receiver 3b is arranged at the measurement position of the transport conveyor 2, and the facing position between the light receiver 3b and the apple W Since the dark box 17 having a plurality of plate-shaped light shields 17a is arranged between the light receiver 3b and the apple W, the transmitted light that has passed through the apple W by the plate-shaped light shield 17a of the dark box 17 is excluded. It is possible to prevent disturbance light other than from entering the light receiver 3b, and by receiving only transmitted light that has passed through the apple W, the internal quality of the apple W can be measured and determined with high accuracy. In particular, the light projector 3a irradiates light from the side of the apple W conveyed by the conveyor 2 to the substantially equator portion, and the light receiver 3 receives the transmitted light transmitted through the apple W from above the apple W. In 3b, the transmitted light that has passed through the fruit stem portion of the apple W can be reliably received, and a failure such as a cavity that is likely to occur in the fruit stem portion of the apple W can be accurately determined.

  Further, since the light shielding body is formed by the dark box 17, and the opening 18 is provided on the bottom surface and the upper surface of the dark box 17, the function as the plate-shaped light shielding body 17a can be provided. The determination device 1 can be formed at a low cost, and transmitted light can be received more reliably by the light receiver 3b through the openings 18 of the two or three plate-shaped light shielding plates 17a, thereby further improving the determination accuracy. Can be achieved.

  Further, since the measuring unit 3 is configured by the light projector 3a and the light receiver 3b that are paired, and the dark box 17 that is disposed between the light receiver 3b and the apple W, the transport operation of the transport conveyor 2 is performed with the dark box 17. The irrelevant transport conveyor 2 can be easily placed above the measurement position, and the dark box 17 does not come into contact with the apple W being transported. This eliminates mistakes in discharging onto the drawer conveyor 19 and the like. As a result, for example, even a sorting and packaging facility that processes apples W at high speed can be easily handled.

  3 to 6 show modifications of the measuring unit 3. Hereinafter, the same parts as those in the above example will be described with the same reference numerals. First, the measurement unit 3 shown in FIG. 3 is characterized in that the dark box 17 is formed in a cylindrical shape (or a rectangular tube shape), plate-shaped light shielding plates 17a are provided above and below the dark box 17, and a constant interval is provided inside the dark box 17. In this point, two plate-shaped light shielding plates 17a are provided. Then, openings 18 having the same inner diameter are provided concentrically at the center positions of the four plate-like light shields 17 a arranged at regular intervals in the vertical direction, and on the plate-like light shield 17 a serving as the upper surface of the dark box 17. The light receiver 3b is integrally attached. Also in the measuring unit 3 with this configuration, the dark box 17 prevents disturbance light other than the transmitted light from being received by the light receiver 3b, and in addition to obtaining the same effects as the above example, the dark box 17 is formed in a cylindrical shape or the like. Since the four plate-shaped light shields 17a are provided in the longitudinal direction, the dark box 17 itself can be formed in a small size, and can be arranged compactly on the conveyor 2, for example.

  In the measurement unit 3 of this example, the inner diameters of the openings 18 provided in the four plate-shaped light shields 17a of the dark box 17 are not shown, but the light receiver 3b side is made smaller and the apple W side is made larger. It may be formed. Thus, if the inner diameter of the opening 18 is set so as to become smaller in order along the optical path L, the transmitted light of the apple W is reliably taken in from the large-diameter opening 18, and disturbing light is transmitted by the small-diameter opening 18. The light can be shielded, and the transmitted light can be received more reliably by the light receiver 3b. Although not shown, in the measurement unit 3 of this example, for example, a cloth-shaped light shield may be used instead of the three plate-shaped light shields 17a from the bottom. By using an inexpensive cloth of a predetermined form having a light, light can be reliably shielded.

  4 is characterized in that the dark box 17 is formed in a cylindrical shape (or a rectangular tube shape), a plate-shaped light shield 17a is provided on the upper surface of the dark box 17, and a constant interval is provided inside the dark box 17. The point is that three brush-like light blocking bodies 20 are provided. Then, the plate 18 serving as the upper surface of the dark box 17 is provided concentrically with the openings 18 having the same inner diameter at the center positions of the plate-shaped light shields 17a and the three brush-shaped light shields 20 arranged at regular intervals in the vertical direction. The light receiver 3b is integrally mounted on the light shield 17a. Also in the measuring unit 3 having this configuration, the dark box 17 prevents the disturbance light other than the transmitted light from being received and the same effect as the above example can be obtained. In addition, the dark box 17 is formed in a cylindrical shape or the like in the longitudinal direction. Since the plate-like light-shielding body 17a and the brush-like light-shielding body 20 are provided, the dark box 17 itself can be formed in a small size, for example, can be arranged compactly on the transport conveyor 2, or light can be reliably obtained by using a predetermined form of brush. Therefore, the measurement accuracy can be further improved.

  Further, the measurement unit 3 shown in FIG. 5 is characterized in that the light shielding body is formed of a spiral light shielding body 21 in which a thin plate or rod-like member is spirally wound. In this case, the spiral light-shielding body 21 is formed so that the spiral portion 21a is continuous in the axial direction of the opening 18, but when the predetermined position in the circumferential direction of the spiral portion 21a is directed in the axial direction, the spiral shield 21a is predetermined. The spiral portions 21a are positioned at intervals, and a plurality of light shields are arranged at predetermined intervals. In the measuring unit 3 having this configuration, the spiral portion 21a of the spiral light blocking body 21 prevents disturbance light other than transmitted light from being received, and the same effect as the above example can be obtained. By doing so, a light-shielding body can be formed, which can be easily manufactured and a cheaper light-shielding body can be obtained.

  6 is characterized in that the dark box 17 is formed in a cylindrical shape (or a rectangular tube shape), a rod-shaped member is wound in the dark box 17, and the spiral light-shielding body having an opening 18 at the center position. 22 is inserted. In the case of the measuring unit 3 as well, the same effect as the spiral light shield 21 shown in FIG. 5 can be obtained in the spiral light shield 22, and the dark box 17 itself can also have a light shield effect. The effect that the spiral light shielding body 22 can be reliably held is obtained.

  Further, the measurement unit 3 shown in FIG. 7 is characterized in that, among the plurality of plate-shaped light shields 17a, a protrusion is formed on the apple W side at a position surrounding the opening 18 in the lower plate-shaped light shield 17a facing the apple W. The plurality of protruding portions 23a to 23c are formed. These protrusions 23a to 23c are composed of a plurality of rib-like members formed concentrically with different diameters with respect to the circular opening 18, as shown in FIG. Projection dimensions are set.

  Thereby, direct light or disturbance light from the projector 3a can be reflected by the projections 23a to 23c, and the light can be prevented from reaching the opening 18 of the plate-shaped light blocking body 17a, and transmitted light by the light receiver 3b. Can be more reliably received, and the measurement accuracy of the measurement unit 3 can be further improved. In addition, since a plurality of the protrusions 23a to 23c are concentrically formed with different diameters with respect to the opening 18 of the plate-shaped light shield 17a, the direct light and the disturbance light from the projector 3a are further transmitted to the plate-shaped light shield 17a. It is possible to avoid reaching the opening 18, to further reliably receive the transmitted light by the light receiver 3 b, and to further improve the measurement accuracy of the measurement unit 3.

  The protrusions 23a to 23c may be provided separately from rubber or resin around the opening 18 of the plate-shaped light shielding body 17a, or around the opening of the plate-shaped light shielding body 17a facing the apple W. You may make it protrude integrally. Moreover, even if it forms protrusion part 23a-23c with a cloth, a brush, etc. and interferes with the apple W at the time of a measurement, you may be comprised so that it may bend flexibly and the positioning of the said apple W may not be affected.

  As long as the protrusions (23a to 23c) are formed at positions around the opening 18, only one or two protrusions may be formed, or four or more protrusions (23a to 23c) may be formed. Moreover, it is preferable that the protrusion dimensions of the protrusions 23a to 23c are set based on the size of the apple W to be measured. According to the shape of the apple W, the protrusion 23c on the outer side from the center protrusion 23a. You may make it enlarge a protrusion dimension in order.

  Furthermore, as shown in FIG. 8, it may be applied to a dark box 17 in which three plate-shaped light shields 17a are formed. In this case, as shown in FIG. 8, the lowermost plate-shaped light shield 17a. Thus, the protrusion 23a is formed. Further, the shape of the protrusions 23a to 23c is preferably formed in a concentric shape with different diameters when the opening 18 is circular as in the present embodiment. For example, in the case of a rectangular opening such as a square, the position surrounding it What is necessary is just to make it protrude below from.

  The present invention is not limited to each of the above-described examples. For example, an integrated structure of the light receiver 3b with the dark box 17 is adopted in the measurement unit 3 in FIG. 2 or the inner diameters of the openings 18 of the respective light shielding bodies are different. For example, a part of each example can be appropriately combined, for example, by applying a configuration to be applied to a light shielding body of all examples. Moreover, in the said embodiment, although the case where the arrangement | positioning form of the light projector 3a of the measurement part 3 and the light receiver 3b was horizontal-upper arrangement | positioning was demonstrated, horizontal-horizontal arrangement, horizontal-lower arrangement, upper-lower arrangement, etc. The present invention can be applied to an appropriate arrangement form, and the number of the projectors 3a in the measuring unit 3 is not limited to two, and may be one or three or more. Further, as shown in FIG. 9, the dark box 17 may be formed by inclining the plate-shaped light shielding body 17 a upward from the opening 18 toward the outside.

  The present invention is not limited to an internal quality determination device in which a single measuring unit composed of a projector and a light receiver is arranged on the conveying means, but a plurality of measuring units composed of a pair of light projectors and light receivers are arranged, for example, It can also be applied to an internal quality judgment device that can switch the measurement signal.

The block diagram which shows one Embodiment of the internal quality determination apparatus of the agricultural product concerning this invention Configuration diagram of the measurement unit The block diagram which shows the modification of the measurement part The block diagram which shows the other modification of the measurement part The block diagram which shows the other modification of the measurement part The block diagram which shows the other modification of the measurement part The block diagram which shows the other modification of the measurement part The block diagram which shows the other modification of the measurement part The block diagram which shows the other modification of the measurement part

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Internal quality determination apparatus 2 ... Conveyor 2a ... Bucket 3 ... Measuring part 3a ... Light projector 3b ... Light receiver 4 ... · Spectroscope 5 ··· Detection device 6 ··· Control device 7 ··· Calculation means 8 ··· Determination means 9 ··· Comprehensive determination device 10 ··· Setting Means 11 ··· Output means 12 ··· Discharge device 13 ··· Display means 14 ··· Clock signal transmitter 17 ··· Dark box 17a · Plate-shaped light shield 17b · · · Side wall 18... Opening 20... Brush-shaped light-shielding body 21... Spiral light-shielding body 21 a ... Spiral part 22 ... Spiral light-shielding body 23 a to 23 c.

Claims (10)

Agricultural products that irradiate the agricultural products conveyed in a line by the conveying means with the light projecting means, receive the light transmitted through the agricultural products by the irradiation with the light receiving means, and determine the internal quality of the agricultural products based on the received light In the internal quality judgment device of
In order to prevent disturbance light other than transmitted light that has passed through the agricultural product from entering the light receiving means, a plurality of light shieldings are provided in a range excluding the facing position between the light receiving means and the agricultural product and between the light receiving means and the agricultural product. An internal quality determination device for agricultural products, characterized in that the body is provided at predetermined intervals.   The light projecting means is configured to irradiate light from the side of the agricultural product conveyed by the conveying means, and the light receiving means is configured to receive light emitted from the light projecting means and transmitted through the agricultural product from above the agricultural product. The agricultural product internal quality determination device according to claim 1, wherein:   The agricultural product internal quality determination device according to claim 1, wherein the light-shielding body is provided in a dark box.   The agricultural product internal quality determination device according to claim 3, wherein the dark box is formed in a cylindrical shape, and a plurality of light shields are provided in a longitudinal direction of the dark box.   The agricultural product internal quality determination device according to any one of claims 1 to 4, wherein the light shielding body is a brush.   The agricultural product internal quality determination device according to any one of claims 1 to 4, wherein the light shielding body is a cloth.   The agricultural product internal quality determination device according to any one of claims 1 to 6, wherein the light shielding body is formed in a spiral shape.   8. The light-shielding body is formed of a plurality of light-shielding bodies having openings, and an inner diameter of the opening is formed such that a side close to the light receiving means is a small diameter and a side close to agricultural products is a large diameter. The agricultural product internal quality determination device according to any one of the above.   2. The light-shielding body is composed of a plurality of light-shielding bodies having openings, and a protruding portion protruding toward the agricultural product is formed at a position surrounding the opening of the light-shielding body facing the agricultural product. The agricultural product internal quality determination device according to any one of 8.   The agricultural product internal quality determination device according to claim 9, wherein a plurality of the protrusions are concentrically different in diameter relative to the opening.

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