JP2002107294A - Spectral analyzer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spectral analyzer capable of improving the measuring precision. SOLUTION: This device comprises a projecting means 1 for emitting a light to a matter M to be measured located in a measuring position; a light receiving means 2 for spectrally dividing the transmitted light from the matter M to be measured and receiving the spectrally divided light by a charge accumulating type light receiving sensor 18 to provide its spectral data; and a control means 3 for controlling the operation of each part and analyzing the internal quality of the matter M to be measured on the basis of the spectral data. Before executing a main measuring processing for measuring the spectral data for analyzing the internal quality, a preliminarily measuring processing for emitting light to the measuring matter to be measured and obtaining light receiving data from the transmitted light is executed, and the charge accumulation time in the execution of the main measuring processing is changed and adjusted on the light receiving data obtained by the preliminary measuring processing so that the charge accumulation quantity of the light receiving sensor 18 is a set to be proper quantity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spectroscopic analyzer used for analyzing the internal quality of an object to be measured, such as, for example, fruits and vegetables. Light transmitting means for transmitting light or reflected light from the object to be measured, and receiving the separated light with a charge accumulation type light receiving sensor to obtain spectral spectrum data; And a control means for controlling the internal quality of the object to be measured based on the spectral data.

[0002]

2. Description of the Related Art Conventionally, in a spectroscopic analyzer having the above configuration, as disclosed in Japanese Patent Application Laid-Open No. Hei 7-229840, the light receiving means is, for example, a method in which light is split by a concave diffraction grating, and A charge storage type line sensor or the like in which light receiving elements composed of photoelectric conversion elements and the like are arranged in an array is used, and an object to be measured such as fruits and vegetables is measured based on spectral spectrum data measured by such light receiving means. Was configured to analyze the internal quality. In the above-described conventional configuration, the size (diameter) of the object to be measured is measured, and according to the measurement result, the charge accumulation time when measuring the spectral data by the light receiving means as the object to be measured is larger. The charge storage time is configured to be changed and adjusted so as to be longer.

[0003]

In the above-described conventional configuration, the size (diameter) of an object to be measured is measured, and the charge accumulation time by the light receiving sensor becomes longer as the object to be measured is larger according to the size. Depending on the growth condition and varieties, such as agricultural products such as mandarin orange as the measurement object, even if the size of each measurement object is different, depending on the size, Based on the technical viewpoint that the light transmittance fluctuates, the charge accumulation time is changed according to the size of the object to be measured, so that an appropriate charge accumulation amount can always be obtained. However, this conventional configuration has the following disadvantages, and there is still room for improvement.

That is, the above-described conventional configuration has been proposed based on the technical viewpoint that the transmittance of light varies depending on the size of the object to be measured even if the size of the object differs. However, the present applicant has assumed that the relationship between the size of the measured object and the light transmittance always has a specific correlation, even when assuming an agricultural product such as mandarin orange as the measured object. It was found out from the experimental results that it was not. FIG. 7 shows the measurement of the correlation between the size (diameter) of a plurality of oranges as an object to be measured and the intensity of light received by a light-receiving sensor based on standard irradiation conditions for the object to be measured (orange). It shows the measurement result by human. From this figure, the relationship between the size of the object to be measured and the light transmittance is such that the transmittance tends to decrease as the object to be measured increases, but the transmittance varies greatly even with the same size, and is always constant. It is clear that there is no specific correlation.

[0005] Incidentally, the display contents (corners, circles, ×, diamonds) of each point in FIG. 7 represent the measurement results of different varieties, and the sizes vary even if the varieties are the same. It is shown that the transmittance varies even for the same type and the same size.

Therefore, sufficient measurement accuracy cannot be obtained only by changing the charge accumulation time in accordance with the size of each of the objects to be measured as in the above-described prior art. To add an explanation, for example, when the external shape of the object to be measured is large and the charge accumulation time is set to be longer accordingly, the object to be measured is more likely to transmit light than the assumed transmittance. If the charge storage time is too long, the charge storage amount may exceed the maximum storage amount and saturate. In addition, when the external shape of the object to be measured is small and the charge accumulation time is set to be short accordingly, if the object to be measured hardly transmits light compared to the assumed transmittance, the charge accumulation time Is too short, the amount of charge accumulation is insufficient, the S / N (signal-to-noise) ratio is reduced, the measurement error becomes large, and there is a possibility that accurate measurement cannot be performed.

The present invention has been made in view of such a point, and an object of the present invention is to provide a spectroscopic analyzer capable of improving measurement accuracy.

[0008]

According to a first aspect of the present invention, there is provided a light projecting means for irradiating light to an object to be measured which is located at a position to be measured, and a device for separating transmitted light or reflected light from the object to be measured. The split light is received by a charge accumulation type light receiving sensor,
A light receiving unit that obtains spectral spectrum data; and a control unit configured to control the operation of each unit and analyze an internal quality of an object to be measured based on the spectral data. The means
Before performing the main measurement process of measuring the spectral spectrum data for analyzing the internal quality, the target object to be measured is irradiated with light to separate transmitted light or reflected light from the target object. A preliminary measurement process of receiving the separated light to obtain light reception data, and setting a charge accumulation amount of the light reception sensor based on the light reception data obtained in the preliminary measurement process. So that it is the right amount
It is configured to change and adjust the charge accumulation time when executing the main measurement process, or to change and adjust the light emission intensity of the light emitting unit when performing the main measurement process. And

That is, before executing the main measurement processing for measuring the spectral spectrum data for analyzing the internal quality, the preliminary measurement processing is executed, and based on the received light data obtained in the preliminary measurement processing. Then, the charge accumulation time when executing the main measurement process is changed or the light emission intensity of the light projecting means is changed and adjusted so that the charge accumulation amount of the light receiving sensor becomes the set appropriate amount. In other words, before performing the main measurement process, it is possible to determine the actual light transmission state of the measured object based on the received light data obtained by irradiating the actual measured object with light. From the received light data, for example, the charge accumulation time required for the charge accumulation amount of the light receiving sensor to reach the set appropriate amount while maintaining the same light emission intensity as in the preliminary measurement process, or the same charge accumulation time as the preliminary measurement process It is possible to calculate the light emission intensity and the like by the light emitting means necessary for the charge accumulation amount of the light receiving sensor to become the set appropriate amount, and to execute the actual main measurement process based on such conditions to obtain the light receiving amount. The measurement process can be performed in a state where the charge accumulation amount of the sensor becomes the set appropriate amount.

Therefore, the present invention measures spectral spectrum data for analyzing internal quality under measurement conditions such that the charge accumulation amount of the light receiving sensor becomes a set appropriate amount based on the actual measurement result of the object to be measured. Since the measurement process is performed, the charge accumulation amount is saturated as in the above-described conventional configuration,
The measurement processing can be performed with high accuracy in a state where there is no disadvantage such that the S / N (signal-to-noise) ratio is reduced due to the shortage of the charge accumulation and the measurement error increases.

According to a second aspect, in the first aspect, the object to be measured is configured to be transported by a transport unit so as to pass through the measurement target portion, and the control unit includes:
The pre-measurement process is configured to be performed as the object to be measured reaches the measurement target portion, and the main measurement process is performed after the preliminary measurement process is completed. Is executed to change and adjust the charge accumulation time or the projected light amount at the time of executing the operation.

That is, as the object to be measured is transported by the transport means and reaches the measurement target, the preliminary measurement process and the main measurement process are executed in that order. Therefore, it is possible to efficiently carry out the measurement process by sequentially and sequentially transporting the object to be measured by the transporting means, and a means suitable for carrying out claim 1 is obtained.

According to a third aspect of the present invention, in the second aspect, the object to be measured has a spherical or substantially spherical outer shape, and the control means determines a region on the front end side in the transport direction of the object to be measured. The present invention is characterized in that the preliminary measurement process is executed as a target, and the main measurement process is executed in a region on the center side in the transport direction of the measured object.

That is, as an object to be measured having a spherical or substantially spherical outer shape reaches a measurement target portion,
After performing the preliminary measurement processing on the area on the front end side in the transport direction of the measured object, the main measurement processing is performed on the area on the center side in the transport direction of the measured object. Therefore,
Although the pre-measurement process and the main measurement process can be efficiently performed on the conveyed measurement object, even if the measurement object has a spherical or almost spherical outer shape, the center of the measurement object in the conveyance direction is Since the main measurement process is executed for the region on the side, the main measurement process for measuring the spectral spectrum data for analyzing the internal quality can be performed with high accuracy. In addition, in the area on the center side in the transport direction, the light projected from the light projecting means wraps around the outer periphery of the object to be measured, and the sneak light directly received by the light receiving means is small, and the measurement error is small. , And suitable means for carrying out claim 2 can be obtained.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION A spectrometer according to the present invention is provided in a sorting facility for sorting oranges as an object to be measured, for example, and measures internal quality information of the oranges, that is, sugar content and acidity. A case where the present invention is applied to a configuration for measuring will be described with reference to the drawings.

This spectroscopic analyzer, as shown in FIG.
A light projecting unit 1 as a light projecting unit that irradiates light to the object M (citrus), and a light receiving unit that disperses light transmitted through the object M and receives the separated light to obtain spectral spectrum data. And a control unit 3 as a control unit for controlling the operation of each unit.
It is configured to be placed and transported in a line in a line at a set speed by a transport conveyor 4 as a transporting means, and is configured to sequentially pass a measurement target location by the present spectroscopic analyzer. Then, light projected from the light projecting unit 1 onto the measurement target M located at the measurement target location is measured.
The light projecting unit 1 and the light receiving unit 2 are arranged separately on the left and right sides of the measurement target portion in a state where the light is received by the light receiving unit 2 after transmitting the light.

The light projecting section 1 is provided with a halogen lamp 6 as a light emitting body that emits light by electric power supplied from a power supply circuit 5.
And a concave reflector 7 for reflecting light emitted from the halogen lamp 6 downward so as to condense the light.
And a reflecting mirror 8 that reflects the light reflected by the reflecting plate 7 and changes the direction of the reflecting mirror 8 to the object to be measured M located at the measurement target location in the horizontal direction. Further, there is provided a shutter mechanism 9 which can be switched between a state where the light reflected by the reflecting mirror 8 is irradiated on the measurement target portion and a state where the light is blocked.

The light receiving section 2 includes a condenser lens 10 for condensing light transmitted through the object M, a reflecting mirror 11 for reflecting the light upward, and a light for a wavelength region to be measured as described later. A color filter 12 that allows light to pass therethrough, a shutter mechanism 13 that can be switched between an open state that allows light to pass and a closed state that blocks light, and, when light that has passed through the shutter mechanism 13 in the open state enters, the light is split. And a spectroscope 14 for measuring the spectral data. The spectroscope 14 has a light entrance 15 as shown in FIG.
A reflecting mirror 16 for reflecting the light incident from the light source, a concave diffraction grating 17 as spectral means for splitting the reflected light into light of a plurality of wavelengths, and a light intensity for each wavelength separated by the concave diffraction grating 17. A light receiving sensor 18 that measures spectral spectrum data by detecting the light is arranged in a dark box 19 made of a light-shielding material that shields external light. The light receiving sensor 18 includes a concave diffraction grating 17
1024, simultaneously receive the transmitted light spectrally reflected at each wavelength, convert the transmitted light into a signal for each wavelength, and output the signal.
It is configured by a bit MOS type line sensor. Although not described in detail, this line sensor outputs a photoelectric conversion element such as a photodiode for each unit pixel, a capacitor for storing the charge obtained by the photoelectric conversion element, and outputs the stored charge to the outside. And a driving circuit for the same. Note that the charge storage time by the capacitor can be changed externally via a drive circuit. And 700 nm to 1100 nm
The light of the wavelength in the range can be detected.

The light projecting section 1 and the light receiving section 2 are provided with an object M to be measured.
Are provided in a state where they are integrally supported by a frame 20 provided so as to bypass the upper side of the measurement target place through which the frame 20 passes. The entire vertical position can be changed and adjusted. Vertical adjustment mechanism 2
Although not described in detail, 1 is installed in a fixed position with respect to the fixed portion F, and can be moved up and down by a screw feed mechanism 21b driven by an electric motor 21a. A reference filter 22, which is an example of a reference body, is provided above the location where the object to be measured M passes on the transport conveyor 4 and is fixed at the fixing portion F. The reference filter 22 is constituted by an optical filter having a predetermined absorbance characteristic, and is specifically constituted by using opal glass.

Then, by adjusting the position of the entire frame 20 in the vertical direction, as shown in FIG.
The normal measurement state in which the light from the light projecting unit 1 is received by the light receiving unit 2 after transmitting the object to be measured M placed on the conveyor 4 and, as shown in FIG. After the light from the unit 1 has passed through the reference filter 22, it can be switched to the reference measurement state in which the light is received by the light receiving unit 2.

The conveyor 4 is configured to drive an endless rotating band 4a by an electric motor 4b, and detects a rotation state of a rotating shaft of a rotating body 4c that winds the endless rotating band 4a. A rotary encoder 23 is provided, and the detection information of the rotary encoder 23 is also input to the control unit 3. Further, as shown in FIG. An optical passage sensor 24 for detecting passage of the object M is provided at the location. In the passage sensor 24, a light emitting device 24a that emits light and a light receiving device 24b that receives the light are arranged separately on the left and right sides of the transport path by the transport conveyor 4, and the light emitting device When the light emitted from 24a is received by the light receiver 24b, the light is turned off. When the light is blocked by the object M and the light is not received by the light receiver 24b, the light is turned on.

The control section 3 is configured using a microcomputer, and is configured to control the operation of each section as shown in FIG. That is, the power supply voltage supplied to the halogen lamp 6 in the light projecting unit 1 is adjusted, the shutters of the light projecting unit 1 and the light receiving unit 2 are opened and closed, the up and down adjusting mechanism 21 is operated, and the spectroscope 14 is operated.
, And controls the operation of each unit such as the operation of adjusting the change of the charge storage time. Moreover, this control unit 3
Based on the measurement result obtained by the spectroscope 14, a calculation process for analyzing the internal quality of the measurement object M is executed.

Next, the control operation of the control unit 3 will be described. The control unit 3 irradiates the reference filter 22 with light from the light projecting unit 1 in place of the measurement object M prior to normal measurement on the measurement target M, and transmits transmitted light from the reference filter 22. And a reference data measurement mode for obtaining, as reference spectral data, spectral data obtained by receiving the separated light by the light receiving unit 2 and the measured object M transported by the transport conveyor 4. A normal data measurement mode for irradiating light from the light projecting unit 1 to obtain measured spectral data and analyzing the internal quality of the object M based on the measured spectral data and the reference spectral data. It is configured to be freely switchable.

More specifically, in the reference data measurement mode, the vertical movement mechanism 21 is operated to move the frame 20 in the reference measurement state while the conveyance of the object M by the conveyance conveyor 4 is stopped. Switch to. Then, each of the shutter mechanisms is switched to the open state, the light from the light projecting unit 1 is irradiated on the reference filter 22 instead of the object M, and the transmitted light from the reference filter 22 is transmitted to the light receiving unit 2. And spectral light data obtained by receiving the separated light is measured as reference spectral light data.

In the reference data measurement mode, the detection value (dark current data) of the light receiving sensor 18 in a non-light state in which light to the light receiving section 2 is blocked is also measured. That is, the shutter mechanism of the light receiving unit 2 is switched to the closed state, and the detection value of the light receiving sensor 18 for each unit pixel at that time is obtained as dark current data.

Next, the control operation in the normal data measurement mode will be described. In this normal data measurement mode, the frame 20 is switched to the normal measurement state by operating the up / down adjustment mechanism 21 and the object M
Is carried. Then, each time the measurement target M passes through the measurement target portion, the measurement spectral data is measured. When executing this measured spectral data,
The control unit 3 irradiates light to the measured object with respect to an area on the front end side in the transport direction of the measured object as the measured object M passes through the measurement target location at the front end position of the measured object M and transmits the transmitted light. A preliminary measurement process is performed to obtain the received light data by receiving the separated light by spectrally dispersing the light, and thereafter, for the region on the center side in the transport direction of the measured object, the spectral data for analyzing the internal quality. Execute the main measurement process of measuring.
In the preliminary measurement process, a detection value (preliminary measurement value) of the target object M on the front end side in the transport direction in a set time by the light receiving sensor 18 is obtained in advance. Then, based on the received light data obtained in the preliminary measurement processing, the charge storage time when executing the main measurement processing is changed and adjusted so that the charge storage amount of the light receiving sensor 18 becomes the set appropriate amount. .

It should be noted that the orange as the object to be measured has a standard size different depending on the type of the varieties. Standard reference data of the stage is set and stored in advance based on experimental data and the like. That is, as shown in FIG. 6, a short charge accumulation time Tx1 is set to correspond to the standard transmittance for a small-diameter product, and the standard transmission of the product is performed for a medium-sized product. A medium charge accumulation time Tx2 is set to correspond to the rate, and a longer charge accumulation time Tx3 is set to correspond to the standard transmittance of a large-diameter variety. . Then, in the actual measurement work, any one of them is selected, and the operating conditions in the control unit 3 are set by the command means (not shown).

First, the specific processing in the actual work will be described. First, based on the transport speed of the transport conveyor 4 detected by the rotary encoder 23 and the information detected by the passage sensor 24, the measurement target location is determined. The timing and the like at which the leading end position of each of the transported objects M in the transport direction and the central position of the transported object M in the transport direction start passing through the measurement target are determined in advance. That is, when the measurement object M starts to be detected by the passage sensor 24, the output of the passage sensor switches from the off state to the on state, and when the measurement object M finishes passing, the output switches from the on state to the off state. Based on the measurement information and the information on the transport speed of the transport conveyor 4, the timing at which the leading end position of the workpiece M in the transport direction passes through the measurement target location can be obtained.

Then, as shown in the timing chart of FIG. 6, the detection value of the light receiving sensor 18 is blank-read for a set time Ts from the timing T1 at which the front end position of the measuring object M in the transport direction passes through the measurement target location. The blank reading operation is repeated twice. After that, the light receiving sensor 18 for a set time Tu.
The light receiving amount measurement processing (an example of the preliminary measurement processing) for reading the detected value (preliminary measurement value) is performed. The detection value obtained by the received light amount measurement process is not used as spectral spectrum data, but the charge accumulation time in the main measurement performed thereafter is changed and adjusted based on the measurement result so that the charge accumulation amount becomes a set appropriate amount. Used as an index for still,
The double-read operation is performed twice because the electric charge already stored in the capacitor is extracted and the amount of received light is measured immediately at the timing T1 when the front end position of the workpiece M in the transport direction passes through the measurement target location. Since a measurement error due to light is large, the amount of received light is measured after a predetermined time has elapsed. Also, as shown in FIG. 6, the set time Tu for executing the received light amount measurement processing is changed and set so as to be longer for a large-diameter type object to be measured, according to the measurement conditions depending on the type. Will be.

The charge accumulation time (Tx1, Tx2, Tx
3) is increased or decreased to a value necessary for setting the charge accumulation amount to a set appropriate amount in accordance with the transmittance of the measured object. The relationship between the amount of received light and the charge accumulation time may be mapped in advance using experimental data or the like, or may be appropriately calculated based on an arithmetic expression. Then, in this measurement processing, the measured spectral data is measured during the charge accumulation time set in this way.

FIG. 6 shows the measurement timing for various large, medium and small objects M as a reference point (0) when the center position in the transport direction of the object M passes through the measurement target location. T2 indicates the timing at which the end position of the measured object M in the transport direction passes through the measurement target location. The data transfer indicates a time for transmitting the measurement data to the control unit 3.

Even when the charge accumulation time is changed and adjusted based on the measurement result of the light reception amount measurement processing as described above, an appropriate charge accumulation time based on the measurement result is set in the transport direction of the object M. If a long processing time is required such that the end position exceeds the timing of passing the measurement target location, the end time of the charge accumulation time is closer to the transport direction end position than the timing of passing the measurement target location. Thus, the charge accumulation time is corrected so that Alternatively, in such a state, it is conceivable that the projection intensity of the halogen lamp 6 is insufficient. Therefore, if the power supply voltage supplied to the halogen lamp 6 can be increased, the power supply voltage is adjusted. The power supply circuit 5 may be controlled so as to increase the light projection intensity.

Next, based on the various data obtained in this way, an arithmetic processing for analyzing the internal quality of the object to be measured M is performed by using a spectroscopic analysis technique which is a known technique. That is, based on the measured spectral data, the reference spectral data, and the dark current data, an absorbance spectrum for each of the separated wavelengths and a second derivative in the wavelength region of the absorbance spectrum are obtained, and the secondary It is configured to execute an analysis calculation process of calculating a component amount corresponding to the sugar content and a component amount corresponding to the acidity included in the measurement target M by the differential value. Absorbance d
Is Rd for reference spectral data, Sd for measured spectral data, and Da for dark current data.

[0034]

D = log {(Rd-Da) / (Sd-Da)}

The control unit 3 calculates the component amount included in the measured object M based on the multiple regression analysis according to the following equation (2).

[0036]

Y = K0 + K1 · A (λ1) + K2 · A (λ2)

Where, Y: component amounts K0, K1, K2; coefficients A (λ1), A (λ2); second derivative of absorbance spectrum at specific wavelength λ

The control unit 3 stores a specific component amount calculation formula and specific coefficients K0, K1, K
2, and the wavelengths λ1, λ2, etc. are set and stored in advance, and the component amount of each component is calculated using a specific component amount calculation formula for each component.

[Other Embodiments] Other embodiments will be listed below.

(1) In the above-described embodiment, the preliminary measurement processing is performed after performing two blank reading operations from the timing at which the front end position of the object to be measured passes through the measurement target location in the transport direction. If it is possible to appropriately block the sneaking light from the light emitting unit to the light receiving unit, it may be performed after one blank reading operation, or by performing the blank reading operation before the timing. Alternatively, the preliminary measurement processing may be executed almost simultaneously with the timing.

(2) In the above embodiment, based on the received light data obtained in the preliminary measurement processing, the main measurement processing when the main measurement processing is executed so that the charge accumulation amount of the light receiving sensor becomes a set appropriate amount. Although the configuration for changing and adjusting the charge accumulation time has been exemplified, instead of such a configuration, the charge accumulation amount of the light receiving sensor is set to the set appropriate amount based on the light reception data obtained in the preliminary measurement processing. A configuration may be adopted in which the light emitting intensity of the light emitting means when performing the main measurement process is changed and adjusted. Specifically, the power supply circuit 5 is controlled so as to change and adjust the power supply voltage supplied to the halogen lamp 6 so as to change the light emission intensity so that the charge accumulation amount of the light receiving sensor becomes the set appropriate amount. Is also good.

(3) In the above embodiment, the configuration in which the measurement process is executed with the transport speed of the object to be measured by the transport conveyor being constant is illustrated. However, the present invention is not limited to such a configuration, and may be used, for example, in fruit sorting equipment. In such a case, it is conceivable to change the transport speed for the purpose of improving the processing performance of fruit selection. When the transport speed is changed in accordance with the work situation, the charge storage time is changed and adjusted in accordance with the increase or decrease of the transport speed so that the charge storage amount of the light receiving sensor is set to an appropriate amount. If the end point deviates from the region on the center side in the transport direction of the measured object, the power supply voltage supplied to the halogen lamp may be adjusted to control the power supply circuit so as to increase the light projection intensity. . Alternatively, the configuration may be such that the amplification gain of an amplifier that amplifies the detection value of the light receiving sensor is variably adjusted.

(4) In the above embodiment, a filter made of opal glass was used as the reference body. However, the present invention is not limited to this. For example, a filter having a predetermined absorbance characteristic other than a diffusion plate such as ground glass may be used. The material is not limited.
Further, the light projecting means is not limited to the halogen lamp 6, and various light projecting means such as a mercury lamp and a Ne discharge tube may be used.
The light receiving means is not limited to the MOS type line sensor, and other detecting means such as a CCD type line sensor may be used.

(5) In the above embodiment, the spectral spectrum is measured based on the transmitted light from the object to be measured. However, the present invention is not limited to such a configuration, and the spectral spectrum is measured based on the reflected light from the object to be measured. The spectrum may be measured.

(6) In the above embodiment, the sugar content and the acidity are exemplified as the internal quality of the measuring object M. However, the present invention is not limited to this, and other internal quality such as taste information may be measured.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a spectroscopic analyzer.

FIG. 2 is a configuration diagram of a spectroscope.

FIG. 3 is a diagram showing a vertical position change state;

FIG. 4 is a control block diagram.

FIG. 5 is a plan view showing an installed state of the spectroscopic analyzer.

FIG. 6 is a timing chart of a measurement operation.

FIG. 7 is a view showing actually measured data of a relationship between a size (diameter) of an object to be measured and a received light intensity;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 light emitting means 2 light receiving means 3 control means 4 transport means 18 light receiving sensor M object to be measured

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Hiroshi Kishida 64 Ishizu-Kitacho, Sakai City, Osaka Prefecture Inside the Kubota Sakai Factory (72) Inventor Yoshiyuki Katayama 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Manufacturing Co., Ltd. In-house F-term (reference) 2G051 AA05 AB06 AC21 BA06 BA20 BC03 CA03 CC07 DA06 EA09 EA24 EA25 2G059 AA01 BB11 DD12 EE01 EE12 HH01 JJ02 JJ05 JJ11 JJ13 JJ14 JJ23 JJ26 KK04 MM01 MM05 MM14 MM14 MM14

Claims (3)

[Claims] 1. A light projecting means for irradiating light to an object to be measured located at a position to be measured, and a light-receiving sensor of a charge accumulation type which spectrally separates transmitted light or reflected light from the object to be measured. And a control unit for controlling the operation of each unit and analyzing the internal quality of the object to be measured based on the spectral data. An analysis apparatus, wherein the control unit irradiates light to an object to be measured before executing the main measurement process of measuring the spectral spectrum data for analyzing the internal quality. It is configured to perform a preliminary measurement process of receiving transmitted light or reflected light from an object and receiving the separated light to obtain received light data, and based on the received light data obtained in the preliminary measurement process. Before The charge accumulation time of the light measurement sensor is changed and adjusted so that the charge accumulation amount of the light receiving sensor becomes the set appropriate amount, or the light projecting unit of the light emitting unit when executing the main measurement process is changed. A spectroscopic analyzer configured to change and adjust the light emission intensity. 2. The apparatus according to claim 1, wherein the object to be measured is transported by a transport unit so as to pass through the measurement target location. It is configured to execute the preliminary measurement process, and is configured to execute the main measurement process after the preliminary measurement process is completed. The charge accumulation time or the time when the main measurement process is executed is performed. 2. The spectroscopic analyzer according to claim 1, wherein the spectroscopic analyzer is configured to change and adjust the light projection intensity. 3. The object to be measured has a spherical or substantially spherical outer shape, and the control means executes the preliminary measurement processing on a region on the front end side in the transport direction of the object to be measured. 3. The spectroscopic analyzer according to claim 2, wherein the main measurement processing is performed on a region on the center side in the transport direction of the object to be measured.