JP4713731B2 - Equipment for measuring the internal quality of fruits and vegetables - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is particularly useful for non-destructive measurement of fruits and vegetables such as sugar content, acidity, water content, freshness, etc. of fruits and vegetables such as sweet summer, mandarin orange, yam, strawberry, none, apples, and melons. The present invention relates to an internal quality measuring device and an internal quality measuring method, and more particularly to an internal quality measuring device for fruits and vegetables capable of determining quality with high accuracy and high speed.
[0002]
[Prior art]
As an apparatus for measuring the internal quality of fruits and vegetables, for example, a single unit disposed on one side in the horizontal direction of the fruits and vegetables carried and transported by a belt conveyor having a flat belt, on one side in the transport width direction (left and right direction) of the belt conveyor. Measurement light (condensed area light) is emitted from one lamp (irradiation means), and the fruits and vegetables are transmitted by the light receiving means disposed on the opposite side of the lamp, that is, on the other side of the conveyor width direction (left and right direction) of the belt conveyor. In general, an internal quality measurement is performed by a linear light-receiving / receiving device that receives the measured light.
In order to obtain the reference light in the apparatus, for example, the light amount of the condensed region light, which is strong light from the lamp (irradiation means) in a state where the fruits and vegetables are not located at the measurement position, is supplied to the ND filter. The light is received without being saturated by attenuation by switching, or by inserting and inserting a standard to the measurement position.
However, in the case of measuring the sugar content, acidity, etc. of the fruits and vegetables by detecting the transmitted light with the light receiving means positioned opposite to each other in the horizontal direction, the fruits and vegetables having a large size, a thick epidermis or a high density of the pulp In the case of fruits and vegetables with a large attenuation of light, the ratio of the reflected light such as reflected light reflected on the measurement surface of the fruits and the transmitted light becomes small, and this reflected light reduces the accuracy of the internal quality measurement of the fruits and vegetables. The biggest inconvenience occurs.
Therefore, in order to eliminate the above inconvenience, by arranging a plurality of lamps (irradiation means) so as to surround the fruits and vegetables, it is possible to increase the amount of irradiation light to the fruits and vegetables and to eliminate the wraparound light. In many cases, an internal quality measuring device configured in a light emitting / receiving orthogonal type in which the irradiation direction of irradiation light and the light receiving direction of the light receiving means are orthogonal to each other is used.
In the light emitting / receiving orthogonal type internal quality measuring apparatus, it is necessary to periodically move the standard body to the fruit transport path in order to obtain the reference light. And, since the standard body must be moved at high speed and at a predetermined timing, the configuration of the entire apparatus becomes complicated, and there is a disadvantage incurring high costs, and the timing is shifted for some reason. , Fruits and vegetables will collide in the measuring enclosure. In addition, since the inertial force is generally large, it cannot be stopped instantaneously when the collision occurs. For this reason, it led to the damage accident of an apparatus, received a lot of damage, and there was room for improvement. By the way, by using a packet-type continuous conveyor that can set fruits and vegetables and standard bodies in packets and transport them at a predetermined interval, the inconvenience due to the timing deviation can be eliminated. Since a standard is set in a specific packet among a large number of packets that circulate, the fruits and vegetables cannot be set in that particular packet. Therefore, the operation of the operator who is set manually is hindered, and the work efficiency is lowered and the mental health is deteriorated. In addition, fruit juice or the like tends to adhere to the packet for setting the fruits and vegetables, and dust adheres to the attached fruit juice, which causes troubles such as adhesion of the dust to the standard body and lowering detection accuracy. Sometimes. In addition, in the orthogonal light quality measuring device, it is conceivable to guide the irradiation light from the irradiation means to the light receiving means by an optical fiber or the like, but not only the optical coupling part requires high accuracy but also the irradiation means. Is a high temperature such as a halogen lamp, the fiber and the irradiation means cannot be directly connected. Therefore, since the fiber light receiving surface is small, measurement errors due to adhesion of dust and the like are large, and it is expensive to solve them, especially when it is composed of many halogen lamps. It's not feasible.
If you explain the cause of the inconvenience using the case of measuring the internal quality by performing spectroscopic analysis,
The equation of absorbance that is the basis of the spectroscopic analysis is that the intensity of light from a light source that is an irradiation means is I ₀ (λ), the intensity of light that has passed through fruits and vegetables is It (λ), and k (λ) = c · ε. Then
The absorbance is represented by log (It (λ) / I ₀ (λ)) = − d · k (λ) (3).
However, d = optical path length, c = concentration, ε = intensity of absorption at a specific wavelength (molar absorption coefficient), and λ = wavelength.
That is, if the absorbance itself is to be obtained, if α is the attenuation of the reference light, α · I ₀ (λ) = reference light, and the faithful optical path irradiated to the fruits and vegetables and the necessary known attenuation A filter with a flat wavelength characteristic is required. In this sense, naturally, the light incident on the light receiving means as the reference light must be the condensing region light.
Therefore, in order to obtain the reference light in general concept, the gap between the fruits and vegetables to be conveyed is sewn and the ND filter is switched in the light projection / reception linear type, or the standard body is inserted / removed, or in the light projection / reception orthogonal type Since almost no light enters the light receiving portion due to the light shielding effect (action) of the transport system, the ND filter cannot be used, and a configuration is adopted in which the standard is inserted / removed at the measurement position. In either case, the reference light is obtained in accordance with the formula (3) in which the light source and the condensing area light are transmitted through the standard body.
The standard body used for the light emitting / receiving orthogonal type is a material (material) having an appropriate value such as Teflon, ceramic, etc. that has an appropriate value, attenuation, and wavelength characteristics that does not saturate the light receiving sensor and the electric amplifier. I use it.
[0003]
[Problems to be solved by the invention]
In view of the above situation, the present invention intends to solve the problem in that the internal quality of fruits and vegetables can be measured accurately and efficiently while simplifying the configuration.
[0004]
[Means for Solving the Problems]
In order to solve the above-described problem, the fruit and vegetables internal quality measuring device according to the present invention comprises a reflecting means at a position facing the light receiving part of the light receiving means with reference to the measurement position of the fruit or vegetable to be measured, and the light receiving part An irradiating means for irradiating measurement light from a direction substantially perpendicular to the light receiving axis is arranged, the fruits and vegetables are conveyed to the measurement position, and the measurement light from the irradiating means is prevented from entering the light receiving unit. The light receiving unit is provided at a position substantially orthogonal to the irradiation axis of the irradiation unit provided with a conveying unit including a light blocking unit for performing the measurement light transmitted through the condensed light from the irradiation unit to the fruits and vegetables , The internal quality is measured, the fruit and vegetables are not positioned at the measurement position, and the adjacent fruit and vegetables are irradiated with the diffusion region light from the irradiation means, and the irregularly reflected light reaches the reflection means. Measured In a state that affects areas outside of, it is characterized in that reads the light incident on the light receiving portion by reflecting diffused region light of the irradiation unit by the reflecting means as a referral Reference light.
Even if the fruits and vegetables are the same type, the attenuation rate (transmittance) due to d, that is, the optical path length, varies greatly (about two orders of magnitude) due to differences in size, skin, density, and the like. An important point in measuring the internal properties of fruits and vegetables is that if de · ke (λ) is the effective absorbance, the effective optical path length de unrelated to the internal properties (internal quality) such as sugar content and acidity is canceled.
Assuming that λ ₀ is a wavelength that shows a low correlation with the internal properties,
de · ke (λ) / de · ke (λ ₀ )
De is deleted by performing the following operation. In general, first, the dark current data in the dark state of the measurement system is subtracted from the measured object data and the reference data, and the difference is obtained by performing an arithmetic process such as a second derivative to obtain an offset and a gradient. As a result, the difference between the wavelength having a correlation with the sugar content, the acidity, and the like and the surrounding wavelength is obtained, and the internal property is calculated by statistical processing such as multiple regression and P / L / S.
As an expression for internal properties in statistical processing,
a ₁ · de · ke (λ ₁ ) + a ₂ · de · ke (λ ₂ ) ...
-B ₁ · de · ke (λ ₀₁ ) -b ₂ · de · ke (λ ₀₂ ) ... + c
The above-mentioned λ ₁ and λ ₂ are wavelengths showing a high correlation with internal properties, λ ₀₁ and λ ₀₂ are wavelengths showing a low correlation with internal properties, and a ₁ , b ₁ and c are approximate. Coefficients and constants.
From the above equation, the effective optical path length de is approximately canceled by the term λ ₀ .
From the above, it is meant that the reference light need not be absolute and may be a constant. In reality, it is possible to measure the internal quality with high accuracy by solving the problem that the wavelength characteristics change due to optical aging due to deterioration of the light source and dust adhering to the light receiving surface of the light receiving means. .
Therefore, by adopting a configuration in which the light receiving means receives the diffusion region light with a small amount of light (which is weak light) that does not saturate, it is possible to eliminate the need for a standard body required in the light emitting / receiving orthogonal type. In addition, the diffused region light reflecting the deterioration of the irradiation means is reflected by the reflection means to reach the light receiving means, thereby obtaining the reference light reflecting the dirt on the light receiving surface of the light receiving means. Can do. In addition, the measurement light that has passed through the fruits and vegetables is read by the light receiving unit from a direction substantially orthogonal to the irradiating means, so that the reflected light such as reflected light reflected on the surface of the fruits and vegetables does not reach the light receiving unit.
[0005]
By providing means for changing and adjusting the amount of reflected light taken into the light receiving unit from the reflecting means, the reflected light is reflected by the reflecting means in accordance with the amount of light emitted from the irradiating means at the time of initial installation or replacement of the irradiating means. It is possible to quickly adjust the amount of diffusion region light to the light receiving means to an optimum amount.
[0006]
The irradiating means is arranged so as to irradiate the fruits and vegetables from the left and right direction perpendicular to the conveying direction of the conveying means, and is incident downward from the gap formed in the middle of the left and right direction perpendicular to the conveying direction of the conveying means. By arranging the light receiving means so as to receive the measured light and disposing the reflecting means directly above the light receiving means, not only the light emitted from the irradiation means can be shielded by the conveying means. The reflecting means can be arranged using a wide upper space.
[0007]
By configuring the irradiation direction of the irradiating means with respect to the fruits and vegetables to be adjustable or adjusting the vertical height of the irradiating means with respect to the fruits and vegetables, the irradiation direction or the irradiation height can be optimally adjusted according to the size of the fruits or vegetables. Can be height.
[0008]
By providing a light shielding means for limiting the irradiation width in the transport direction of the diffusion region light of the irradiation means, the interval between adjacent fruits and vegetables in the transport direction (interval for obtaining reference light) is reduced. Can do.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 show an apparatus for measuring the internal quality (internal properties) of fruits and vegetables of the present invention. This measuring apparatus includes a belt conveyor 1 as a conveying means for conveying fruits and vegetables M as an object to be measured, a photoelectric device 2 for detecting the presence or absence of the fruits and vegetables M conveyed by the belt conveyor 1, and the photoelectric device. 2 is provided with a light emitting / receiving orthogonal measuring unit 3 for measuring the internal quality of the fruits and vegetables M having passed through 2, and a rotary encoder 4 for calculating the conveying speed of the belt conveyor 1 and the like. The specific configuration of the fruit and vegetables internal quality measuring device is not limited to that shown in the figure, and can be freely changed.
[0010]
The photoelectric device 2 includes a light projecting unit 5 disposed on one side of the left and right sides of the belt conveyor 1 and a direction perpendicular to the conveying direction of the belt conveyor 1 from the light projecting unit 5 (may be a substantially orthogonal direction). That is, it comprises a light receiving unit 6 that receives light irradiated in the conveyance width direction, and outputs binarized data depending on the presence or absence of fruits and vegetables on the optical axis of the light projecting unit 5, and this data and the belt conveyor 1 From the number of pulses of the rotary encoder 4 synchronized with the conveyance, the position and size (size) of the fruits and vegetables and the gap between the fruits and vegetables adjacent in the conveyance direction can be measured.
[0011]
The belt conveyor 1 is a pair of left and right endless belts 7 and 8 that are driven and rotated by the power of an electric motor or the like, and stands on the upper surface of each of the belts 7 and 8 to place and support fruits and vegetables. It is composed of two left and right rows of plate-like bodies 7A and 8A that also serve as a light shielding plate for shielding the irradiation light from the irradiation means 10.
Of the plate-like bodies 7A and 8A, the plate-like body 7A located on the outer side in the transport width direction has a vertical (vertical) dimension set longer than the plate-like body 8A located on the inner side in the transport width direction. But you can. The plate-like body 7A or 8A is formed by alternately positioning the plate-like pieces 7a or 8a located on the outer side in the conveyance width direction and the plate-like pieces 7b or 8b located on the inner side in the conveyance width direction. Is composed. The plate-like pieces 7a, 7b, 8a, 8b can be placed and transported without damaging the fruits and vegetables by making them all from synthetic resin such as urethane or rubber. Further, of the plate-like bodies 7A and 8A, the plate-like body 8A located on the inner side in the conveyance width direction is provided in an inclined posture located on the outer side in the conveyance width direction toward the upper end side, and the outer surface of the fruits and vegetables and the upper end of the plate-like body 8A The contact can be made without generating a gap between them. In the figure, two rows of plate-like bodies 7B and 8B are provided on one belt, but one row (or one) may be provided, or three or more rows (three pieces) It can also be carried out by providing a plate-like body of the above. Moreover, it may be carried out by providing a packet or the like instead of the plate-like body, or it may be constituted only by a flat belt having nothing to place and support these fruits and vegetables. In addition, a light receiving means 11 described later can be disposed immediately below a gap S formed by arranging the pair of belts 7 and 8 at a predetermined interval. Then, by arranging the light-shielding brushes 9 and 9 on both sides of the light receiving means 11 in the belt conveying direction, the irregularly reflected light entering the light receiving portion of the light receiving means 11 from the gap S can be blocked without hindering the conveyance of fruits and vegetables. However, the configuration may be changed to other configurations such as a packet type that is advantageous in light shielding effect and is used by being fixed to the transport device.
[0012]
As shown in FIGS. 1 to 3, the measuring unit 3 irradiates the fruits and vegetables that have been placed and transported to the irradiation position by the irradiation means 10 for irradiating the fruits and vegetables with measurement light and the belt conveyor 1. The light receiving means 11 for receiving the measurement light incident (moved) downward from the gap S formed on the belt conveyor 1 among the transmitted measurement light, and the light receiving means 11 as shown in FIG. The spectroscopic device 12 including a spectroscope for determining the spectrum by dispersing the measurement light received by the component wavelength, and performing arithmetic processing based on the result from the spectroscopic device 12, sugar content, acidity, water content, It comprises a quality judgment means 13 for judging quality such as freshness and a judgment output means 14 for outputting a judgment result from the quality judgment means 13. Reference numeral 15 shown in FIG. 1 denotes an optical fiber for guiding transmitted light received by the light receiving means 11 and reference light described later to the spectroscopic device 12. Here, by arranging the light receiving means 11 below the belt conveyor 1, the belt conveyor 1 can not only be used to shield the sneak light from the irradiation means 10, but also compared to the case where it is arranged above. Although there is an advantage that the light receiving distance from the fruits and vegetables can be always kept at a substantially constant distance, the light receiving means 11 can be arranged above the belt conveyor 1 for implementation. Since the light receiving means 11 is arranged directly below the transport route of the fruits and vegetables to be transported, rotten fruits and juices of broken fruits and vegetables fall on the light receiving surface of the light receiving means 11, and dust or the like adheres to them. Therefore, for example, by providing automatic cleaning means such as periodically wiping the light receiving surface, it is possible to eliminate the need for cleaning.
[0013]
As shown in FIGS. 2 and 3, the irradiating means 10 includes a projector composed of a pair of left and right reflecting mirror type halogen lamps disposed on both sides of the belt conveyor 1 in the transport width direction. As shown, the condensed region light 10 </ b> A is irradiated to the fruits and vegetables from the left and right sides, and the light transmitted through the fruits and vegetables is received by the light receiving means 11. One or two irradiation means 10 may be provided, or three or more irradiation means 10 may be provided to ensure illuminance. When a large number of the irradiating means 10 are provided, the condensed area light transmitted through the fruits and vegetables can be received by the light receiving means 11, and the reflecting means 16 described later can receive the diffused area light. The light receiving means 11 or the reflecting means 16 is disposed so as to surround it so as not to disturb the conveyance. Further, the irradiation direction or the irradiation height can be adjusted according to the size of the fruits and vegetables by configuring the irradiation direction of the irradiation means 10 with respect to the fruits and vegetables to be adjustable. It is desirable to have an optimal direction or height. The change adjustment can be performed manually or using an electric force. When using the electric power, for example, the irradiation direction or the irradiation height may be automatically changed according to the size (height) of the fruits and vegetables.
Further, as shown in FIGS. 2 and 3, light shielding plates 17 are provided as light shielding means for limiting the irradiation angle H of the diffusion region light of the irradiation means 10 on both sides of the irradiation means 10 in the transport direction. . By providing the light shielding plates 17 and 17 in this manner, there is an advantage that the interval between the fruits and vegetables M and M adjacent in the transport direction can be narrowed. When the reference light is read in a state where the fruits and vegetables M exist within the irradiation angle H, the reflected light reflected on the surface of the fruits and vegetables M enters the light receiving means 11 directly or via the reflecting means 16 and causes an error in measurement accuracy. Therefore, it is necessary to consider the interval between the fruits and vegetables M and M so that the fruits and vegetables M do not exist within the irradiation angle H. For this reason, the reading of the reference light and the reading of the transmitted light of the fruits and vegetables M can be efficiently performed by narrowing the irradiation angle H using the light shielding plates 17 and 17 as described above. In addition to the fixed type, the light shielding plates 17 and 17 may be of a type that can change and adjust the angle, or that that is slidable so that the fruit and vegetables side tip position of the light shielding plates 17 and 17 can be changed. Note that the angle change of the light shielding plates 17 and 17 and the sliding movement are performed using a manual force or an electric force.
[0014]
Reflecting means 16 for receiving the diffused region light 10B from the irradiating means 10 and causing the diffuse reflected light 16A to enter the light receiving means 11 is provided at an upper position opposite to the light receiving means 11.
The reflecting means 16 is preferably provided with a height adjusting mechanism (not shown) capable of adjusting the height while being set to a height at which the fruits and vegetables having the maximum diameter can sufficiently pass. By adjusting the height of the height adjusting mechanism using a manual force or an electric force, it is possible to quickly adjust the level of the amount of light that is reflected when the irradiation unit 10 is initially installed or when the irradiation unit 10 is replaced. . By adjusting the height of the reflecting means 16, it is possible to configure a means for changing and adjusting the amount of reflected light taken from the reflecting means 16 into the light receiving unit of the light receiving means 11. However, the reflection area of the reflecting means 16 is changed. It may be a configuration. The reflecting means 16 shown in the figure has a white matte disc of Teflon having a diameter of 60 mm and is installed at a height of 180 mm from the conveyor surface of the belt conveyor 1. In the state where the height is set, if the light quantity of fruits and vegetables that can obtain sufficient illuminance is 10 ⁻⁵ , the reference light can obtain a strong light quantity of about 10 ⁻³ . As the reflecting surface of the reflecting means 16, milk white glass (opal glass), magnesium oxide coated plate, barium sulfate coated plate, etc. can be used as a material close to the ideal diffusing surface, and the diffused region light from the irradiation means 10 is received. It is also possible to implement the surface processing for condensing the means 11 or to configure the reflecting means 16 having a necessary shape suitable for the apparatus, which is not affected by disturbance light. Since the reflecting surface of the reflecting means 16 faces downward, there is little influence of dirt on the reflecting surface, and regular cleaning is sufficient. When the reflected light is used as reference light, the wavelength data of the reference light is checked for each gap between the transported fruits and vegetables, so that the deterioration of the light source and the optical system are affected to the extent that the measurement accuracy is affected. There is an advantage that it is possible to know in advance by monitoring changes in wavelength characteristics such as dirt.
[0015]
The case of measuring the internal quality of fruits and vegetables using the internal quality measuring device for fruits and vegetables having the above-described structure will be described. The automatic supply device for fruits and vegetables not shown on the conveying start end side of the belt conveyor 1 automatically or manually. Supply fruits and vegetables and transport them continuously. Then, the conveyed fruits and vegetables are detected by the photoelectric device 2, and the timing and size at which the fruits and vegetables reach the light receiving means 11 and the distance between the fruits and vegetables that are close to each other in the conveyance direction are measured. When the fruits and vegetables reach the measuring unit 3 and the light receiving means 11 is in an optimum reading range where there is no wraparound light of the fruits and vegetables, the light receiving means 11 receives the transmitted light and measures the internal quality.
In the measurement of the reference light, the diffused region light is irradiated to the adjacent object to be measured (fruits and vegetables), and the irregularly reflected light reaches the reflecting means 16 and there is a region that affects the measurement. In this apparatus, the distance from the optical axis of the photoelectric device 2 to the line of the region in which the photoelectric device 2 is affected is set to 100 mm (position of 200 mm from the light receiving means 11), and this is the time during which the reference light can be read. The maximum speed is 100 seconds at a conveyance speed of 60 m / min. Since the illuminance obtained from the reflecting surface of the reflecting means 16 is larger than the transmitted light of fruits and vegetables, the reference light can be read even in a short time of 10 milliseconds. Further, here, a device that can be adjusted to an optimum wavelength characteristic amplitude in the gain setting of the amplifier of the spectroscopic device 12 is used. The fruits and vegetables that are continuously conveyed to the conveying terminal by the belt conveyor 1 are automatically or manually selected using another sorting device based on the measured values.
[0016]
【The invention's effect】
According to the first aspect of the present invention, the diffused region light reflected by the deterioration of the irradiating means is reflected by the reflecting means so as to reach the light receiving means as the reference light. The standard can be made unnecessary, so the structure can be simplified, and the internal quality of fruits and vegetables such as sugar content, acidity, moisture content, freshness, etc. is non-destructive and quick. An apparatus for measuring the internal quality of fruits and vegetables that can be measured with high accuracy can be provided. Moreover, by receiving the measurement light that has passed through the fruits and vegetables from a direction substantially orthogonal to the irradiation means, sneak light such as reflected light reflected on the surface of the fruits and vegetables does not reach the light receiving means, and the detection accuracy is further improved. be able to.
[0017]
According to the second aspect, by providing means for changing and adjusting the amount of reflected light taken from the reflecting means into the light receiving unit, the reflected light is reflected in accordance with the amount of irradiation light from the irradiating means at the time of initial installation or replacement of the irradiating means. It is possible to quickly adjust the light amount of the diffusion region light reflected by the means to the light receiving means to an optimum amount, which is advantageous in use.
[0018]
According to the third aspect, the irradiation means is arranged so as to irradiate the fruits and vegetables from the conveyance width direction of the conveyance means, and receives the measurement light that has been directed downward from the gap formed in the middle of the conveyance width direction of the conveyance means. By arranging the light receiving means and arranging the reflecting means directly above the light receiving means, it is possible to block the irradiation light from the irradiation means by the transport means, and simplify the configuration accordingly. In addition to the above, it is possible to accurately arrange the reflecting means using a wide space above.
[0019]
According to the fourth aspect of the present invention, the irradiation direction or the irradiation height according to the size of the fruits and vegetables can be adjusted by changing the irradiation direction of the irradiation means for the fruits and vegetables or by changing and adjusting the vertical height of the irradiation means for the fruits and vegetables. Can be efficiently irradiated to the fruits and vegetables, and the measurement accuracy can be improved regardless of the size of the fruits and vegetables.
[0020]
According to claim 5, by providing the light shielding means for limiting the irradiation width in the transport direction of the diffusion region light of the irradiation means, the interval between the fruits and vegetables adjacent in the transport direction (for obtaining the reference light) The distance between the fruits and vegetables to be conveyed can be narrowed to efficiently measure the internal quality of the fruits and vegetables as well as the reference light.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of an internal quality measuring apparatus for fruits and vegetables.
FIG. 2 is a schematic plan view of an apparatus for measuring the internal quality of fruits and vegetables.
FIG. 3 is a longitudinal rear view of a measurement unit.
FIG. 4 is a block diagram for processing measurement light.
FIG. 5 is an explanatory diagram showing a light region of an irradiation unit.
[Explanation of symbols]
1 Belt conveyor (conveying means)
2 Photoelectric device 3 Measuring unit 4 Rotary encoder 5 Light projecting unit 6 Light receiving unit
7,8 Belt 7A, 8A Plate
7a, 7b, 8a, 8b Plate-shaped piece 9 Shading brush 10 Irradiation means
10A Focusing area light 10B Diffusing area light
11 Light receiving means 12 Spectrometer
13 Quality judgment means 14 Judgment output means
15 Optical fiber
16 Reflecting means 16A Diffuse reflected light
17 Shading plate H Irradiation angle M

Claims (5)

An irradiating means for irradiating the measuring light from a direction substantially perpendicular to the light receiving axis of the light receiving section is provided with a reflecting means at a position opposed to the light receiving section of the light receiving means on the basis of the measurement position of the fruits and vegetables to be measured A transporting means provided with a light shielding means for disposing and transporting the fruits and vegetables to the measurement position and preventing the measurement light from the irradiation means from entering the light receiving section; The measurement light transmitted through the light region light irradiated to the fruits and vegetables is read by the light receiving unit at a position substantially orthogonal to the irradiation axis of the irradiating means to measure the internal quality, and the fruits and vegetables are located at the measurement position. in the absence, and the irradiated diffusion region light from the irradiation means to the adjacent fresh produce, in a state that irregularly reflected light is affected areas outside the measurement reaches the reflecting means at the reflecting means Irradiation Internal quality measuring apparatus fruit or vegetable, characterized in that to read the light incident on the light receiving portion by reflecting stage of the diffusion region light as referral Reference light. 2. The fruit and vegetables internal quality measuring device according to claim 1, further comprising means for changing and adjusting the amount of reflected light taken into said light receiving section from said reflecting means. The irradiating means is arranged so as to irradiate the fruits and vegetables from the left and right direction perpendicular to the conveying direction of the conveying means, and is incident downward from the gap formed in the middle of the left and right direction perpendicular to the conveying direction of the conveying means. 2. The fruit and vegetables internal quality measuring apparatus according to claim 1, wherein the light receiving means is disposed so as to receive the measured light, and the reflecting means is disposed directly above the light receiving means. 4. The fruit and vegetables internal quality measuring device according to claim 1 or 3, wherein the irradiation direction of the irradiating means with respect to the fruits and vegetables can be changed and adjusted, or the vertical height of the irradiating means with respect to the fruits and vegetables can be changed and adjusted. 4. The fruit and vegetables internal quality measuring apparatus according to claim 3, further comprising a light shielding means for limiting an irradiation width in a transport direction of the diffusion region light of the irradiation means.

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