JP3758250B2 - Internal quality inspection method and apparatus for fruits and vegetables - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an internal quality inspection method for fruits and vegetables and the like for detecting internal defects such as fruits and vegetables based on light transmittance, and an apparatus therefor, particularly in a root vegetable such as radish, along a center line from the head to the tail. The present invention relates to a method and an apparatus for inspecting the internal quality of fruits and vegetables, etc., which detect an internal browning that spreads (hereinafter simply referred to as “browning”) using light transmittance.
[0002]
[Prior art]
Fruits and vegetables that have undergone severe browning often decay at the same time. There is a problem that it will become. Therefore, it is necessary to remove radishes whose browning has progressed to a certain level or more as defective products before soaking them. However, such browning has no change in appearance and is often discovered only after cutting.
[0003]
As the browning progresses, the blackened portion is greatly spread, and as an inspection method there has been a conventional idea of simply discriminating by the amount of transmitted light.
For example, in the invention disclosed in Japanese Patent Laid-Open No. 3-68846, internal defects such as voids, black cores, and red cores that are generated inside the radish are detected by visual observation using X-ray fluoroscopy and optical fluoroscopy. I can do it.
In the invention disclosed in Japanese Patent Application Laid-Open No. 8-127456, browning occurring in the apple can be detected based on the light transmittance.
[0004]
[Problems to be solved by the invention]
However, the above-described conventional internal quality inspection methods for fruits and vegetables have the following problems.
That is, in the invention disclosed in Japanese Patent Application Laid-Open No. 3-68846, since visual discrimination is premised and no specific means for automatic discrimination is shown, there are problems such as severe eye strain of the examiner. was there.
In the invention disclosed in JP-A-8-127456, the test sample is limited to a spherical one such as an apple.
[0005]
The present invention has been made in view of the above problems, and an object of the present invention is to provide an inspection method and apparatus for automatically discriminating the internal quality of fruits and vegetables regardless of the size and shape of the fruits and vegetables.
[0006]
[Means for Solving the Problems]
First, the principle of the present invention will be described with reference to FIGS.
Fig. 2 shows the light transmittance measured using a spectrophotometer for each of a normal radish part (a), a light browning part (b), and a heavy browning part (c) cut out to approximately the same size. It is a graph showing the spectral characteristics.
In the same figure, each spectrum shows a high light transmittance (peak) at a predetermined wavelength in the visible light region in common, and the light transmittance generally decreases as the browning progresses, but the peak wavelength shifts. It is almost unchanged. Therefore, it is judged that the measurement of the total transmittance in the visible light region is sufficient for the inspection of browning using the light transmittance as an index.
[0007]
Based on the above-mentioned idea, each of normal radish, radish having a light browning portion, and radish having a heavy browning portion, each of 30, 80, 130, 180, and 230 mm heading from the head toward the tail FIG. 3 shows the result of measuring the light transmittance distribution by irradiating visible light from the side of the radish at the point.
In the figure, the light transmittance of normal radish is indicated by ○, the browned portion of radish having a light browning portion is indicated by ▼, the normal portion of the radish is indicated by ▽, and the severe browning portion is further indicated. The radishes you have are plotted with ● marks.
Normal radishes increase in light transmittance at a substantially constant rate from head to tail. This is due to the shape of the radish becoming thinner from the head toward the tail. That is, the light transmittance increases as the light transmission width decreases.
[0008]
On the other hand, in the radish having mild browning, the normal part (▽ mark) shows almost the same tendency as the normal radish described above, but the browning part (▼ mark) has a lower light transmittance than the normal part. In addition to the illustration, it can be seen that the light transmittance increases rapidly compared with the normal part when the distance from the head is approximately 55 to 130 mm.
[0009]
Furthermore, even in the radish having severe browning, the light transmittance is low in the entire measurement section, and the light transmittance is rapidly increased as compared with the normal portion when the distance from the head is 80 to 230 mm. It can be seen that the rate of increase is particularly high between 180 and 230 mm.
[0010]
As explained above, in the radish having a mild browning portion, in a predetermined section from the head to the middle, the light transmittance tends to increase rapidly, and in the radish having a severe browning, from the middle to the tail In the predetermined section, the light transmittance tends to increase rapidly. In any case, the light transmittance of a radish having a browning portion rapidly increases in a predetermined section. Therefore, radish with browning can be detected by utilizing such properties.
[0011]
  Therefore, in order to achieve the above object, the internal quality inspection method for fruits and vegetables according to claim 1 is:At least two or more measurement points of the inspection sample are irradiated with light having the same amount of light detected at each measurement point when the inspection sample is a normal product, and actual light transmission at the two or more measurement points is performed. The internal defect of the inspection sample is detected by measuring the amount and comparing the light transmission amount at each measurement point with a predetermined discrimination threshold.As a way to do.
[0012]
  The invention according to claim 2At least two or more measurement points of the inspection sample are irradiated with light having the same amount of light detected at each measurement point when the inspection sample is a normal product, and actual light transmission at the two or more measurement points is performed. This is a method for detecting an internal defect of the inspection sample by measuring the amount and comparing the ratio of the light transmission amount of adjacent measurement points at each measurement point with a predetermined discrimination threshold..
[0013]
  For example, in the radish mentioned above, any two points are selected on the side of the radish,In normal radishes, irradiate light with the same amount of transmission.The amount of light transmitted is measured, and the ratio of the amount of transmitted light or the amount of transmitted light at an adjacent measurement point is compared with the amount of transmitted light or the amount of transmitted light in a normal radish to determine the presence or absence of a browning portion.
[0014]
  The invention according to claim 3 isAt least two or more measurement points of the inspection sample are irradiated with light having the same amount of light detected at each measurement point when the inspection sample is a normal product, and actual light transmission at the two or more measurement points is performed. Measure the amount and compare the light transmission amount at each measurement point with a predetermined discrimination threshold, and compare the ratio of the light transmission amount between adjacent measurement points at each measurement point with a predetermined discrimination threshold This is a method for detecting an internal defect of the inspection sample.
[0015]
  in this way,By comparing the light transmission amount at each measurement point with a predetermined discrimination threshold, and comparing the ratio of the light transmission amount between adjacent measurement points at each measurement point with a predetermined discrimination threshold, The presence or absence can be determined.
[0016]
  Furthermore, the internal quality inspection device for fruits and vegetables according to claim 4 is:A light source and a light distributor for distributing the light obtained from the light source to irradiate at least two or more measurement points of the inspection sample and adjusting the distribution ratio of the light amount irradiated to each measurement point are provided.Light irradiation means;The test sample is measured by measuring the light transmission amount at each measurement point and comparing at least one of the light transmission amount at each measurement point and the transmitted light amount at the adjacent measurement point with a discrimination threshold. Internal quality discrimination means for detecting internal defectsIt is set as the structure which comprises.
[0017]
  That is, the light irradiation means is applied to a plurality of measurement points of the inspection sample.In normal radish, irradiate the same amount of light with the same amount of transmission,Measure the light transmittance at each measurement point,Compare at least one of the ratio of the amount of light transmitted at each measurement point and the amount of transmitted light at the adjacent measurement points to the discrimination threshold.To detect internal defects.
[0018]
  Here, the light irradiation means only needs to be able to irradiate light having a wavelength that causes a change in the light transmittance when there is an internal defect such as browning at least inside the inspection sample. As shown, a visible light source is sufficient. Of course, visible light can be applied with light of various wavelengths such as short wavelength and long wavelength, but detection error is detected when detecting transmitted light when using light with high light transmittance.ofThe possibility of occurrence is low and suitable.
[0019]
  As the internal quality determination means, for example, there is an electronic circuit group including a computer that includes an optical sensor, measures the amount of transmitted light, calculates the light transmittance, detects the degree of change in the light transmittance, and detects internal defects. Conceivable. Of course, the optical sensor to be used is not particularly limited, but it is preferable to use an optical sensor made of a silicon photodiode having high sensitivity in the visible light region. Further, it is not always necessary to perform digital calculation using a computer, and it is sufficient that at least the degree of change in light transmittance can be measured, and the calculation may be appropriately changed by using an analog calculator.
[0020]
  The invention according to claim 5 isThe light irradiation means isA discharge tube that generates pulsed light is provided. That is, only the rise of pulsed light is used using a xenon discharge tube or the like.
[0021]
  The invention according to claim 6 is:The light distributor isIt consists of a bundle of optical fibersThe number of strands of this optical fiber bundleBy changing,From one light sourceThe light distribution rate is changed.
[0022]
  That is, light is introduced from one end of a bundle of optical fibers, and the number of strands of the optical fiber is distributed so that a predetermined distribution ratio is obtained at the other end, thereby forming several optical fiber bundles.If you do thisDepending on the difference in the number of optical fibers in each optical fiber bundleThe amount of light to be irradiated can be changed.
[0023]
  The invention according to claim 7 providesThe light irradiation means isThe light source is moved along the measurement (longitudinal) direction of the measurement object, and irradiation is performed at a plurality of locations. At this time, the light source of the light irradiating means and the sensor for detecting the transmitted light may be moved synchronously. In this way, continuous scanning is also possible. Of course, it is a matter of course that the sensor may be fixed at the measurement point.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a radish internal quality inspection apparatus according to an embodiment of the present invention.
The light irradiation means 10 in the radish internal quality inspection apparatus shown in the figure includes a position detector 20, a light source control device 30, a light source unit 40, a light distributor 50, and an arithmetic determination control device 70. Yes.
[0025]
A test sample radish (hereinafter referred to as “sample radish”) is placed on a sample table (not shown) so as to lie sideways, and the sample table further includes a transport mechanism such as a chain conveyor. Transport the radish to the measurement position. Here, the position detector 20 is a photoelectric switch that detects that the sample radish has been correctly transported to the measurement position. When the sample radish is correctly transported to the measurement position, the arithmetic discrimination control device 70 is activated to control the light source. A signal is sent to the device 30.
[0026]
The light source controller 30 includes a high voltage generator (not shown) and a storage capacitor, and generates a high voltage pulse to a xenon discharge tube 41 (to be described later) when receiving a signal from the arithmetic determination controller 70.
The light source unit 40 includes a xenon discharge tube 41 which is a light source, and an optical device including a reflecting mirror 42 and a lens 43 for introducing generated light into an optical distributor 50 described later. The xenon discharge tube 41 is a discharge tube having an energy value of 1.5 joules, which is applied with a high voltage pulse from the light source control device 30 and emits pulsed light having a maximum peak time of 10 μS. The light generated in this manner is efficiently condensed using the reflecting mirror 42 and the lens 43 and introduced into the light distributor 50.
[0027]
In the present embodiment, a transport mechanism such as a chain conveyor is provided, and the position detector 20 and the light source control device 30 are linked to generate light when the sample radish is transported to the measurement position. However, it is not always necessary to be bound by this configuration. For example, after using a fixed sample stage that simply mounts the sample radish and placing the sample radish correctly, the light emission is controlled by interlocking with the manual switch on / off operation. It doesn't matter.
[0028]
In addition, the original function of the arithmetic discrimination control device 70 is to discriminate between a normal product and a defective product as will be described later. In this embodiment, the light generation means is used to control light emission. Part of it.
Of course, a separate control device may be provided to control the generation of light by receiving the output of the position detector 20.
[0029]
Furthermore, in this embodiment, the xenon discharge tube 41 is used as a light source to generate pulsed light. However, this uses only the rise of the pulsed light to minimize the influence of external light such as work environment light. This is to limit it to the limit.
Of course, the light source is not necessarily limited to the above-described configuration, and it is sufficient that the light transmittance can be changed at least when browning is present in the sample radish. Therefore, it can be appropriately changed by irradiating continuous light using a halogen incandescent bulb.
[0030]
The light distributor 50 is a three-branch unit of light composed of a bundle of optical fibers, and the light obtained as described above is equally distributed and irradiated to the three measurement points A, B, and C of the sample radish. To do.
Note that the measurement points A, B, and C in the present embodiment are three points of 50, 100, and 150 mm from the head of the sample radish, respectively. In the example mentioned above, the radish having a light browning portion is in a section having a distance from the head of 55 to 130 mm, and the radish having a heavy browning portion is in a section having a distance from the head of 80 to 230 mm. , Each shows a rapid change in light transmittance. Thus, if the light transmittance is measured at three points with distances from the head of 50, 100, and 150 mm, both mild browning and severe browning can be detected.
[0031]
The measurement points are not necessarily limited to three points. For example, the distance from the head may be two points of 80 mm and 180 mm, or four or more measurement points may be provided. When two measurement points are used, there is a possibility that slight browning may be overlooked, but it is sufficiently practical.
[0032]
The radish internal quality inspection apparatus includes three light receivers 60 and a calculation determination control device 70 as internal quality determination means.
The light receiver 60 is a sensor that detects the intensity of light transmitted through the sample radish as a photoelectric flow rate, and detects the photoelectric flow rates Ai, Bi, and Ci of the transmitted light at the measurement points A, B, and C.
Specifically, an optical sensor 61 made of a silicon photodiode having a light receiving area of 1 square centimeter is provided, and is disposed on each optical axis of the optical distributor 50 so as to face the optical distributor 50.
[0033]
Further, each light receiving device 60 has a semicircular groove shape that is approximately 10 cm on a side and is in a semicircular groove shape matched to the outer shape of the radish so as to block external light such as leakage light and work environment light at adjacent measurement points. The shading device 62 in which the dent is formed is attached so as to be covered from the rear side of the optical sensor 61. Then, when measuring the photoelectric flow rate, the light shield 62 is brought into contact with the surface of the sample radish.
[0034]
In this way, even when the surface of the sample radish is somewhat uneven, the sponge light-shielding device 62 is deformed, and close to the surface of the sample radish with almost no gap, thereby completely blocking extraneous light. Therefore, accurate photoelectric flow rate measurement can be performed. Further, since the light shield 62 is black, the external light absorption efficiency is high, and the external light can be effectively blocked.
[0035]
The calculation determination control device 70 is composed of a circuit group including a computer (not shown). First, the photoelectric flow rates Ai, Bi, and Ci measured by the light receiver 60 up to a voltage of a magnitude necessary for calculation processing. Amplification is performed using an amplifier (not shown), and the digital value is read by the computer according to the emission peak of the xenon discharge tube.
Then, the magnitudes of the respective photoelectric flow rates Ai, Bi, Ci and the threshold values ai, bi, ci at the respective measurement points determined in consideration of the photoelectric flow rate in the normal product are compared.
[0036]
That is, in the severe browning part, the light transmittance shows a very low value compared with the normal part, so values ai, bi, ci sufficiently smaller than the photoelectric flow rate of the normal product are set as the discrimination threshold,
Ai <ai
Bi <bi
Ci <ci
If any one of the conditions is satisfied, a discrimination signal as a defective product is immediately transmitted to a sorting mechanism (not shown). In response to this, the sorting mechanism sorts out defective products.
[0037]
On the other hand, when it is not determined as a defective product under the above conditions, the photoelectric flow ratios X and Y between adjacent measurement points are calculated using the following arithmetic expression.
X = Bi / Ai
Y = Ci / Bi
After this, for the preset browning discrimination thresholds x and y
X> x
Y> y
If any one of the above conditions is met, it is judged that browning has occurred, and a discrimination signal is transmitted to a sorting mechanism (not shown), and the others are regarded as normal products.
That is, in the radish having browning, the degree of change in light transmittance increases from the head toward the tail, and the ratio of the photoelectric flow rate between adjacent measurement points is used as one index of the degree of change.
[0038]
In this way, a two-step discrimination method using discrimination based on the absolute value of the photoelectric flow rate at each measurement point (previous stage) and discrimination based on the ratio of the photoelectric flow rate between adjacent measurement points (post-stage) should be adopted. However, it is not always necessary to use these two-stage discrimination methods, and defective products can be selected only by discrimination at a later stage.
[0039]
By the way, in the present invention, since the degree of change in light transmittance is measured, the light transmittance at each measurement point should be calculated to determine the ratio.
Light transmittance = (transmitted light amount) / (irradiated light amount) × 100
Therefore, if the amount of irradiation light is made constant as in the present embodiment, the amount of irradiation light cancels out in the ratio calculation, and can eventually be replaced with the ratio of transmitted light amount, that is, the ratio of photoelectric flow rate. .
That is, in the present embodiment, the ratio of the photoelectric flow rate detected at each measurement point is calculated, but this is mathematically synonymous with the calculation of the ratio of the light transmittance after all. The process is simplified.
[0040]
Furthermore, since the discrimination threshold varies somewhat depending on the variety of radish, the production area, the season, and the climate of the year, these are not fixed to the apparatus, and must be determined by the production lot. Therefore, in the present embodiment, several tens of normal products are measured before starting the discrimination process, and about 1/3 of the minimum value of the photocurrent detected at each measurement point is set to ai, bi, ci and about three times the ratio between each measurement point were set as x and y.
As a result, browning was not missed at these set values.
[0041]
In this embodiment, the irradiation light is divided into three equal parts by the optical distributor 50, but it is not always necessary to divide the irradiation light equally, and comprehensive detection including the sensitivity of the optical sensor and the amplification circuit of the detected photocurrent is included. It is sufficient if the sensitivity is guaranteed. For example, even in a normal product, since the light transmittance of the head is small, an error is likely to occur at a measurement point near the head. However, the distribution ratio of the light distributor may be increased in advance near the head and decreased near the tail.
More specifically, when the total light quantity is 1, the measurement point A (distance 50 mm from the head) is 0.67, the measurement point B (distance 100 mm from the head) is 0.24, and the measurement point C (head) When the ratio of the number of optical fibers was adjusted so that the distance from the portion (150 mm) was 0.09, the detected photocurrents in the normal product were almost equal. In order to return this to the actual value, correction may be made by multiplying the inverse value of the distribution rate at the stage of calculation.
[0042]
In this embodiment, the light obtained from one light source is distributed by the light distributor. However, the amount of light per measurement point is reduced, so that it is necessary to increase the amplification of the detected photocurrent accordingly. . As for the increase in the amount of light, a lamp having a larger light emission energy may be used, but it is also possible to prepare a light source individually at each measurement point using a small lamp.
In this individual light source method, it is possible to adopt phase control that measures the light transmittance by shifting each lamp by a minute time, so that measurement determination without leaking light from adjacent measurement points can be performed. Accurate discrimination can be expected.
[0043]
In addition, the light irradiation means may move one lamp along the longitudinal direction of the sample radish so that the lamp emits light at each measurement point. In this case, the light receiver may be arranged at a position corresponding to each measurement point as in the above embodiment, but one light receiver is moved in synchronization with the lamp so that the light at each measurement point is It is also possible to obtain the light transmission amount.
[0044]
Next, the operation of the internal quality inspection apparatus for fruits and vegetables according to the present embodiment shown in FIG. 1 will be described.
The sample radish is placed on a sample table (not shown) so as to lie sideways. This sample stage is provided with a transport mechanism such as a chain conveyor, and transports the sample radish to the measurement position.
When the sample radish is correctly conveyed to the measurement position, the position detector 20 detects this and activates the calculation determination control device 70.
When the operation determination control device 70 is activated, a signal is sent to the light source control device 30. Upon receiving this signal, the light source control device 30 sends a high voltage pulse to the xenon discharge tube 41.
[0045]
The xenon discharge tube 41 is applied with this high voltage pulse and emits pulsed light having a maximum peak time of 10 μS. The light generated in this way is efficiently condensed using the optical devices of the reflecting mirror 42 and the lens 43 and introduced into the light distributor 50.
The light distributor 50 divides the introduced light into three equal parts and irradiates the measurement points A, B, and C. The light receiver 60 detects the amount of transmitted light at each measurement point as a photoelectric flow rate.
Then, the arithmetic determination control device 70 first determines whether the photoelectric flow rates Ai, Bi, and Ci at the respective measurement points are less than or equal to the predetermined thresholds ai, bi, and ci, respectively. When the determination is made, a determination signal for a defective product is sent to a selection mechanism (not shown), and the selection mechanism receives the determination signal and selects a defective product.
[0046]
On the other hand, when the product is not determined to be defective under the above conditions, the calculation determination control device 70 calculates the photoelectric flow ratios X (Bi / Ai) and Y (Ci / Bi) between adjacent measurement points. Then, the magnitude relationship between the predetermined threshold values x and y is examined, and when any one of the photoelectric flow ratios X and Y is larger than the predetermined threshold values x and y, the determination signal as a defective product is determined as described above. It is sent to the mechanism, otherwise it is judged as a normal product.
[0047]
In this way, the light generated by the light source unit 40 is equally distributed to the three measurement points by the light distributor 50 and irradiated, and the photoelectric flow rate at each measurement point detected by the light receiver 60 is used to calculate the distance between the measurement points. It is possible to apply inspection samples of various sizes and shapes by providing a calculation discrimination control device 70 that obtains the degree of change in light transmittance at and detects internal defects such as fruits and vegetables based on the degree of change. The presence or absence of internal defects in the inspection sample can be automatically determined.
[0048]
Note that this embodiment is a radish internal quality inspection device that detects internal defects of radish, but because it focuses on the degree of change in light transmittance, the object of the inspection sample is an elongated shape such as cowpox. Needless to say, it may be a spherical shape such as an apple and can be changed as appropriate.
[0049]
【The invention's effect】
As described above, according to the first aspect of the present invention, by using a relatively easy method of irradiating a test sample with light and measuring the degree of change in light transmittance, It is possible to provide an internal quality inspection method for fruits and vegetables that can automatically detect internal defects of an inspection sample without being influenced by the shape.
[0050]
Moreover, according to the invention concerning Claim 2, the change degree of light transmittance can be measured by easy calculation.
According to the invention of claim 3, a more effective discrimination process is achieved by using a discrimination method using the absolute value of the light transmittance and a discrimination method using the degree of change in the light transmittance. Can be realized.
[0051]
According to the invention of claim 4, it is possible to provide an internal quality inspection device for fruits and vegetables that can automatically detect internal defects of the inspection sample without being affected by the size and shape of the inspection sample. it can.
According to the fifth aspect of the invention, the influence of external light such as work environment light can be minimized by using only the rising edge of the pulsed light.
According to the sixth aspect of the present invention, the amount of transmitted light at each measurement point can be made constant by changing the distribution rate, and detection errors due to differences in the amount of transmitted light can be eliminated.
According to the invention of claim 7, the light distribution ratio can be changed with a simple configuration in which the distribution ratio of the number of strands is changed using a bundle of optical fibers as an optical distributor.
[0052]
According to the eighth aspect of the present invention, it is possible to perform inspection with one light source without using a light distributor by moving the light source.
According to the ninth aspect of the present invention, since external light such as work environment light can be reliably blocked, accurate light transmittance can be measured.
Moreover, according to the invention concerning Claim 10, the change degree of light transmittance can be measured by easy calculation.
Furthermore, according to the invention of claim 11, a more effective discrimination process is achieved by using a discrimination method using the absolute value of the light transmittance and a discrimination method using the degree of change in the light transmittance. Can be realized.
[Brief description of the drawings]
FIG. 1 is a block diagram of a radish internal quality inspection apparatus according to an embodiment of the present invention.
FIG. 2 is a graph showing light transmittance in a visible light region of radish.
FIG. 3 is a graph showing the relationship between the position from the head tip and the light transmittance for each of a normal radish, a radish having a light browning portion, and a radish having a heavy browning portion.
[Explanation of symbols]
20 Position detector
30 Light source control device
40 Light source
41 Xenon discharge tube
42 Reflector
43 lenses
50 Optical distributor
60 Light receiver
61 Optical sensor
62 Shading device
70 Operation discrimination control device

Claims (7)

Irradiate at least two or more measurement points of the inspection sample with light that makes the detected light amount equal to each measurement point when the inspection sample is a normal product,
And the actual light transmission amount at the two or more measurement points is measured,
An internal quality inspection method for fruits and vegetables or the like, wherein an internal defect of the inspection sample is detected by comparing a light transmission amount at each measurement point with a predetermined discrimination threshold. Irradiate at least two or more measurement points of the inspection sample with light that makes the detected light amount equal to each measurement point when the inspection sample is a normal product,
And the actual light transmission amount at the two or more measurement points is measured,
An internal quality inspection method for fruits and vegetables or the like, wherein an internal defect of the inspection sample is detected by comparing a ratio of light transmission amounts of adjacent measurement points at each measurement point with a predetermined discrimination threshold. Irradiate at least two or more measurement points of the inspection sample with light that makes the detected light amount equal to each measurement point when the inspection sample is a normal product,
And, the actual light transmission amount at the two or more measurement points is measured,
The inspection is performed by comparing the light transmission amount at each measurement point with a predetermined discrimination threshold, and comparing the ratio of the light transmission amount between adjacent measurement points at each measurement point with a predetermined discrimination threshold. An internal quality inspection method for fruits and vegetables characterized by detecting internal defects in a sample. A light source, a light irradiating means having a light distributor for distributing the light obtained from the light source to irradiate at least two or more measurement points of the inspection sample and adjusting a distribution ratio of a light amount irradiated to each measurement point ; ,
The test sample is measured by measuring the light transmission amount at each measurement point and comparing at least one of the light transmission amount at each measurement point and the transmitted light amount at the adjacent measurement point with a discrimination threshold. An internal quality inspection device for fruits and vegetables, etc., comprising an internal quality discriminating means for detecting internal defects . In internal quality inspecting device fruits or vegetables such as described above according to claim 4, wherein said light irradiating means, internal quality inspecting device, such as fruit or vegetable, characterized in that it comprises a discharge tube for generating a pulse light. In the internal quality inspection apparatus for fruits and vegetables or the like according to claim 5 , the light distributor is composed of a bundle of optical fibers, and the light distribution ratio from one light source is changed by changing the number of strands of the optical fiber bundle. An internal quality inspection device for fruits and vegetables characterized by being changed. The internal quality inspection apparatus for fruits and vegetables etc. according to claim 4 or 5, wherein the light irradiation means moves the light source along the direction of the two or more measurement points of the fruits and vegetables and irradiates light at each measurement point. An internal quality inspection device for fruits and vegetables.

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