JP5576084B2 - Outdoor crop internal quality measuring device - Google Patents
Outdoor crop internal quality measuring device Download PDFInfo
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- JP5576084B2 JP5576084B2 JP2009235542A JP2009235542A JP5576084B2 JP 5576084 B2 JP5576084 B2 JP 5576084B2 JP 2009235542 A JP2009235542 A JP 2009235542A JP 2009235542 A JP2009235542 A JP 2009235542A JP 5576084 B2 JP5576084 B2 JP 5576084B2
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Description
この発明は、農作物に光を照射し、その透過光から得られた吸光特性に基づいて、農作物の内部品質を測定する屋外用農作物内部品質測定装置に関するものである。 The present invention relates to an outdoor crop internal quality measuring device that irradiates a crop with light and measures the internal quality of the crop based on the light absorption characteristics obtained from the transmitted light.
近年、農作物の内部品質を非破壊に測定する方法として、農作物に光を照射し、その反射光や透過光から得られた吸光特性を利用するという測定方法が用いられている。 In recent years, as a method for nondestructively measuring the internal quality of agricultural products, a measuring method has been used in which light is applied to agricultural products and the light absorption characteristics obtained from the reflected light and transmitted light are used.
そして、この方法を用いた装置として、特許文献１に示すように、連続した波長の光を射出して、青果物の内部品質を測定する卓上設置型の装置が知られている。 As a device using this method, as shown in Patent Document 1, there is known a tabletop type device that emits light of continuous wavelengths and measures the internal quality of fruits and vegetables.
しかし、上述した構成では、連続した波長の光を用いるため、分光器等が必要となり、装置が大型かつ高価となってしまう。 However, in the above-described configuration, since light having a continuous wavelength is used, a spectroscope or the like is required, and the apparatus becomes large and expensive.
そこで、特許文献２に示すように、波長の異なる複数の単波長光を順次切り替えて果実に照射し、それぞれの透過光をフォトダイオードなどの受光素子で検出して、果実の糖度を測定するハンディ型の装置が開発されている。しかしながら、単波長光を用いた場合、その波長によっては、光のほとんどが農作物に吸収され、受光素子に到達する光が微弱になってしまうことがある。その結果、受光素子の測定レンジ以下の光量となり、算出される内部品質が不正確になる場合がある。 Therefore, as shown in Patent Document 2, a handy that measures a sugar content of a fruit by sequentially switching a plurality of single-wavelength lights having different wavelengths to irradiate the fruit and detecting each transmitted light with a light receiving element such as a photodiode. Mold devices have been developed. However, when single-wavelength light is used, depending on the wavelength, most of the light may be absorbed by agricultural products, and the light reaching the light receiving element may be weak. As a result, the light amount is below the measurement range of the light receiving element, and the calculated internal quality may be inaccurate.
そこで、本発明は、上記の問題を一挙に解決すべく、正確に農作物の内部品質を測定することができる、小型かつ安価な屋外用農作物内部品質測定装置を提供することをその主たる所期課題とするものである。 Therefore, the main object of the present invention is to provide a small and inexpensive outdoor crop internal quality measuring device capable of accurately measuring the internal quality of the crop to solve the above problems all at once. It is what.
すなわち、本発明に係る屋外用農作物内部品質測定装置は、ボディと、前記ボディの一面から突出させた筒状をなす内遮光壁及び外遮光壁と、前記内遮光壁の先端開口から入った光の強度を検出して、その強度に応じた値の光強度信号を出力する光検出部と、前記内遮光壁と外遮光壁との間の配置面に配置された、ピーク波長が互いに異なる複数の光を射出する単波長光射出部とを具備し、前記内遮光壁及び外遮光壁の先端開口縁を農作物の外表面に密接又は近接させた状態で前記各単波長光射出部を順次切り替えて点灯させ、該各単波長光射出部から該農作物内を通って前記光検出部で検出された各光の相対強度に基づいて該農作物の内部品質を算出するものであり、前記各単波長光射出部から射出される光の波長と異なる波長の光を射出する補助光射出部をさらに設け、前記補助光射出部を前記配置面上に配置するとともに、前記各単波長光射出部と同時に前記補助光を点灯させるようにしたことを特徴とする。なお、本発明において内部品質とは、熟度、糖度、内部障害等を含むものである。 That is, the outdoor crop internal quality measuring device according to the present invention includes a body, a cylindrical inner light-shielding wall and an outer light-shielding wall projecting from one surface of the body, and light entering from the front end opening of the inner light-shielding wall. A plurality of light detectors that detect the intensity of the light and output a light intensity signal having a value corresponding to the intensity, and a plurality of peak wavelengths different from each other disposed on an arrangement surface between the inner light shielding wall and the outer light shielding wall A single-wavelength light emitting section that emits the light of each of the above, and sequentially switching the single-wavelength light emitting sections in a state in which the leading edge of the inner light-shielding wall and the outer light-shielding wall is close to or close to the outer surface of the crop To calculate the internal quality of the crop based on the relative intensity of each light detected by the light detection unit through the crop from each single wavelength light emitting unit, and each single wavelength Emits light with a wavelength different from that of the light emitted from the light emitting section That the auxiliary light emitting portion and further provided, wherein with the auxiliary light emitting portion is placed on the placement surface, characterized in that so as to light up the same time the auxiliary light and the single-wavelength light emitting portion. In the present invention, the internal quality includes maturity, sugar content, internal disturbance and the like.
前記補助光射出部から射出される光としては、例えば、７００ｎｍ〜９００ｎｍの波長域の光を含むものであれば、農作物内部での透過率が高く好ましい。 As the light emitted from the auxiliary light emitting portion, for example, light containing a wavelength range of 700 nm to 900 nm is preferable because of high transmittance inside the crop.
また、前記内遮光壁及び前記外遮光壁が、同心円状となるように配置されているものとしてもよいし、前記外遮光壁の先端が、前記内遮光壁の先端よりも突出しているものとしてもよい。このようなものであれば、概略球状の農作物に密接または近接させた状態での遮光性が高まるので好ましい。 Further, the inner light shielding wall and the outer light shielding wall may be arranged concentrically, and the tip of the outer light shielding wall protrudes from the tip of the inner light shielding wall. Also good. Such a case is preferable because the light-shielding property in a state of being in close proximity to or close to the substantially spherical crop is increased.
かかる構成の屋外用農作物内部品質測定装置であれば、単波長光射出部からの光が農作物で顕著に吸収された場合であっても、光検出部に到達する光は、補助光射出部からの透過光が加算されたものであるので、受光素子の測定レンジ内の光強度を有するように設定でき、測定精度を担保できる。
また、その補助光射出部は、単波長光射出部と同じ取付機構で、同じ配置面上に取り付けることができるので、構成の複雑化を招くことがない。
With the outdoor crop internal quality measuring device having such a configuration, even if light from the single wavelength light emitting unit is significantly absorbed by the crop, the light reaching the light detecting unit is transmitted from the auxiliary light emitting unit. Therefore, it can be set to have the light intensity within the measurement range of the light receiving element, and the measurement accuracy can be ensured.
Further, the auxiliary light emitting section can be mounted on the same arrangement surface with the same mounting mechanism as the single wavelength light emitting section, so that the configuration is not complicated.
以下、本発明の一実施形態を、図面を参照して説明する。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
本実施形態に係る屋外用農作物内部品質測定装置１は、屋外において収穫前の農作物に光を照射して内部品質を測定するものであり、図１に示すように、内遮光壁１１と、外遮光壁１２と、配置面１３と、測定開始スイッチ１４と、光検出部２と、単波長光射出部３ａ〜３ｄと、補助光射出部４とを備えている。以下に各部を詳述する。 The outdoor crop internal quality measuring apparatus 1 according to the present embodiment measures the internal quality by irradiating light to a crop before harvesting outdoors, as shown in FIG. The light shielding wall 12, the arrangement surface 13, the measurement start switch 14, the light detection unit 2, the single wavelength light emission units 3 a to 3 d, and the auxiliary light emission unit 4 are provided. Each part is described in detail below.
内遮光壁１１及び外遮光壁１２は、図１及び図３に示すように、概略直方体形状のボディ１０の長手方向と平行な一面（以下、正面と言う）から同じ高さだけ垂直に突出し、先端が開口している円筒形状のものである。２つの遮光壁は、内遮光壁１１を内側として同心円状の入れ子状となるように、互いに所定間隔離間して配設されている。 As shown in FIGS. 1 and 3, the inner light shielding wall 11 and the outer light shielding wall 12 protrude vertically by the same height from one surface (hereinafter referred to as the front surface) parallel to the longitudinal direction of the body 10 having a substantially rectangular parallelepiped shape, It has a cylindrical shape with an open end. The two light shielding walls are arranged at a predetermined distance from each other so as to be concentrically nested with the inner light shielding wall 11 inside.
配置面１３は、内遮光壁１１と外遮光壁１２との間の、正面と平行な平らな底面である。 The arrangement surface 13 is a flat bottom surface parallel to the front surface between the inner light shielding wall 11 and the outer light shielding wall 12.
測定開始スイッチ１４は、例えば、正面に設けられた楕円状の押しボタンである。 The measurement start switch 14 is, for example, an elliptical push button provided on the front.
光検出部２は、図１に示すように、内遮光壁１１の底面中央に配設されており、内遮光壁１１の先端開口から入った光の強度を検出して、その強度に応じた値の光強度信号を出力するものであり、例えばフォトダイオードが用いられる。 As shown in FIG. 1, the light detection unit 2 is disposed at the center of the bottom surface of the inner light shielding wall 11, detects the intensity of light entering from the front end opening of the inner light shielding wall 11, and according to the intensity. For example, a photodiode is used.
単波長光射出部３ａ〜３ｄは、図１に示すように、配置面１３上であって、各遮光壁と中心を共有する同心円の円周上に等間隔で、例えば４つ配置されており、ここではＬＥＤ素子とレンズ等を一体化したＬＥＤパッケージが用いられる。 As shown in FIG. 1, for example, four single-wavelength light emitting portions 3 a to 3 d are arranged on the arrangement surface 13 at equal intervals on the circumference of a concentric circle sharing the center with each light shielding wall. Here, an LED package in which an LED element and a lens are integrated is used.
補助光射出部４は、図１に示すように、単波長光射出部３ａ及び３ｄの中間であって、かつ、単波長光射出部３ａ〜３ｄと同一の円周上に、例えば１つ配置されており、ここでは前記同様のＬＥＤパッケージが用いられる。 As shown in FIG. 1, for example, one auxiliary light emitting unit 4 is disposed between the single wavelength light emitting units 3a and 3d and on the same circumference as the single wavelength light emitting units 3a to 3d. Here, the same LED package as described above is used.
単波長光射出部３ａ〜３ｄから射出される光のピーク波長としては、例えば、６００ｎｍ、６７０ｎｍ、７００ｎｍ、８３０ｎｍ及び９５０ｎｍからなる群より選ばれる波長が挙げられ、補助光射出部４から射出される光のピーク波長としては、例えば、８８０ｎｍが挙げられる。
補助光射出部４から射出される光は、各単波長光射出部３ａ〜３ｄから射出される光の各ピーク波長から、３０ｎｍ以内の波長の光を実質的に含まないものが好ましく、５０ｎｍ以内の波長の光を実質的に含まないものであればより好ましい。
Examples of the peak wavelength of the light emitted from the single wavelength light emitting units 3 a to 3 d include a wavelength selected from the group consisting of 600 nm, 670 nm, 700 nm, 830 nm, and 950 nm. An example of the peak wavelength of light is 880 nm.
The light emitted from the auxiliary light emitting unit 4 is preferably substantially free of light having a wavelength within 30 nm from each peak wavelength of the light emitted from each single wavelength light emitting unit 3a to 3d, and within 50 nm. It is more preferable if it does not contain substantially the light of this wavelength.
各光射出部から射出される光の波長はこれらに限られず、例えば、次の方法によって決定することができる。予め、連続スペクトルが観測可能な装置によって、測定対象と同種の農作物を測定しておき、内部品質の状態によって透過率が変化する光の波長域から単波長光射出部３ａ〜３ｄの波長を選択し、いずれの内部品質の状態においても透過率が高い光の波長域から補助光射出部４の波長を選択すればよい。
その際、単波長光射出部３ａ〜３ｄのピーク波長は互いに異なるものであり、補助光射出部４は単波長光射出部の波長帯域に実質的に重ならない帯域の光を射出するものとすればよい。要は、単波長光射出部の各透過光強度を、補助光射出部を点灯することによって、内部品質測定に支障を生じさせない程度の誤差で同じ値だけ加算できるようにしたものであればよい。
The wavelength of the light emitted from each light emitting unit is not limited to these, and can be determined by the following method, for example. Measure the same type of crop as the object to be measured in advance using a device that can observe a continuous spectrum, and select the wavelengths of the single-wavelength light emitting units 3a to 3d from the wavelength range of light whose transmittance varies depending on the state of internal quality. In any internal quality state, the wavelength of the auxiliary light emitting unit 4 may be selected from the wavelength range of light having high transmittance.
At this time, the peak wavelengths of the single wavelength light emitting units 3a to 3d are different from each other, and the auxiliary light emitting unit 4 is assumed to emit light in a band that does not substantially overlap the wavelength band of the single wavelength light emitting unit. That's fine. The point is that each transmitted light intensity of the single-wavelength light emitting part can be added by the same value with an error that does not cause trouble in internal quality measurement by turning on the auxiliary light emitting part. .
以下に、本実施形態に係る屋外用農作物内部品質測定装置１の動作を、図４のフローチャートを参照しながら、射出制御部（図示しない）及び内部品質算出部（図示しない）の動作説明を兼ねて詳述する。 Hereinafter, the operation of the outdoor crop internal quality measuring apparatus 1 according to the present embodiment will be described with reference to the flowchart of FIG. 4 and the operations of the injection control unit (not shown) and the internal quality calculation unit (not shown). Will be described in detail.
まず、測定者が屋外用農作物内部品質測定装置１の内遮光壁１１および外遮光壁１２を農作物Ａの外表面に密着又は近接させた状態で、測定開始スイッチ１４を押すと、射出制御部が、単波長光射出部３ａ及び補助光射出部４を同時に所定時間だけ点灯させる。各光射出部からの光の一部は農作物外表面及び内部で吸収され、一部は農作物内部で散乱し、農作物の外表面から射出され、光検出部２へと到達する。光検出部２は、受光した光の強度に応じた値の光強度信号を内部品質算出部へと出力する。
続いて、射出制御部は単波長光射出部３ｂ、３ｃ、３ｄを順次切り替え、補助光射出部４を各単波長光射出部と同時に所定時間だけ点灯させるので、切り替えた回数分の光強度信号が同様に内部品質算出部へと出力される。
First, when the measurer presses the measurement start switch 14 in a state where the inner light shielding wall 11 and the outer light shielding wall 12 of the outdoor crop internal quality measuring device 1 are in close contact with or close to the outer surface of the crop A, the injection control unit The single wavelength light emitting unit 3a and the auxiliary light emitting unit 4 are turned on simultaneously for a predetermined time. A part of the light from each light emitting part is absorbed inside and outside the crop, and a part of the light is scattered inside the crop, emitted from the outer surface of the crop, and reaches the light detecting part 2. The light detection unit 2 outputs a light intensity signal having a value corresponding to the intensity of the received light to the internal quality calculation unit.
Subsequently, the emission control unit sequentially switches the single wavelength light emission units 3b, 3c, and 3d and turns on the auxiliary light emission unit 4 for a predetermined time simultaneously with each single wavelength light emission unit. Is similarly output to the internal quality calculation unit.
内部品質算出部は、この複数の光強度信号に所定の演算処理を施して、内部品質データＭを算出する。内部品質データＭは、例えば、下記式（１）（２）で表される。 The internal quality calculation unit calculates the internal quality data M by performing predetermined arithmetic processing on the plurality of light intensity signals. The internal quality data M is represented by the following formulas (1) and (2), for example.
なお、Ｉ０は入射光強度、Ｉは透過光強度、ＡＢＳは吸光度、λ１〜λｎは各単波長光射出部の波長、ＡＢＳ−Ｄ１（λｎ）は波長λｎにおける吸光度の差分値、Ｃｏｆ１〜Ｃｏｆｎ及びＩＮＴは所定の定数又は関数をそれぞれ示す。 Here, I 0 is the incident light intensity, I is the transmitted light intensity, ABS is the absorbance, λ 1 to λ n are the wavelengths of the single-wavelength light emitting portions, and ABS-D1 (λ n ) is the difference value of the absorbance at the wavelength λ n . , Cof1 to Cofn, and INT represent predetermined constants or functions, respectively.
ここで、測定対象農作物に対して、単波長光射出部は順次異なる波長の光を射出し、補助光射出部は常に同じ波長の光を射出するため、単波長光射出部の吸光度はそれぞれ変動し、補助光射出部の吸光度は変動しない。そして、内部品質データＭは吸光度の差分値に基づいて算出される、つまり、吸光度の絶対値ではなく、各吸光度間の相対値に基づいて算出されるので、補助光射出部を使用することは内部品質測定に支障を生じさせない。 Here, the single-wavelength light emitting unit sequentially emits light of different wavelengths and the auxiliary light-emitting unit always emits light of the same wavelength to the measurement target crop, so the absorbance of the single-wavelength light emitting unit varies. However, the absorbance of the auxiliary light emitting portion does not vary. And since the internal quality data M is calculated based on the difference value of the absorbance, that is, not based on the absolute value of the absorbance, but based on the relative value between the absorbances, it is possible to use the auxiliary light emitting unit. Does not interfere with internal quality measurement.
内部品質出力手段（図示しない）は、ブザーやスピーカ等の音声出力体、又はＬＥＤや液晶ディスプレイ等の発光体等からなるものであり、内部品質算出部から信号を受信すると、音や光等により測定対象の農作物が所期の内部品質の状態を満たしているか否かを報知し、又は算出された内部品質の状態を表示する。 The internal quality output means (not shown) is composed of a sound output body such as a buzzer or a speaker or a light emitting body such as an LED or a liquid crystal display. Informs whether or not the crop to be measured satisfies the desired internal quality state, or displays the calculated internal quality state.
なお、本発明は前記実施形態に限られるものではない。例えば、補助光射出部は、本実施形態において１つのみとしたが、複数の補助光射出部が同一又は異なる波長の光を射出するものであってもよい。
また、補助光射出部は単波長光射出部と同時に点灯及び消灯を繰り返すものであってもよいし、初めの単波長光射出部の点灯から、最後の単波長光射出部の消灯までの間、点灯し続ける等としてもよい。
The present invention is not limited to the above embodiment. For example, although only one auxiliary light emitting unit is used in the present embodiment, a plurality of auxiliary light emitting units may emit light having the same or different wavelengths.
Further, the auxiliary light emitting unit may be repeatedly turned on and off simultaneously with the single wavelength light emitting unit, or from the time when the first single wavelength light emitting unit is turned on to the time when the last single wavelength light emitting unit is turned off. It may be lit continuously.
加えて言えば、農作物に応じて、点灯させる補助光射出部を選択する補助光選択部を設けても良い。これには、点灯及び消灯だけでなく、射出される光の光強度を変化させるようにしたもの等を含めてもよい。 In addition, you may provide the auxiliary light selection part which selects the auxiliary light emission part to light according to agricultural products. This may include not only turning on and off, but also changing the light intensity of the emitted light.
さらに、農作物選択部を設けてもよい。農作物選択部は、測定者が農作物の種別を選択するボタンを押すなどの手段によって選択した農作物に応じて、内部品質算出部における複数の所定の演算処理から１つを選択した演算処理選択データを含む、農作物選択データを出力するものである。
農作物選択データには、選択された農作物に応じて、点灯させる補助光射出部を選択したものである補助光選択データを含めてもよい。これには、点灯及び消灯だけでなく、射出される光の光強度を変化させるようにしたもの等を含めてもよい。
また、例えば、ある農作物では単波長光射出部の波長として使用した波長が、別種の農作物では補助光射出部の波長として有効である場合などに、選択された農作物に応じて、単波長光射出部及び補助光射出部の役割を組み替えたものである光射出部組み合わせデータを含めてもよい。
Furthermore, a crop selection unit may be provided. The crop selection unit selects calculation processing selection data selected from a plurality of predetermined calculation processes in the internal quality calculation unit according to the crop selected by the measurer by pressing a button for selecting the type of the crop. Including crop selection data.
The crop selection data may include auxiliary light selection data obtained by selecting an auxiliary light emitting unit to be turned on according to the selected crop. This may include not only turning on and off, but also changing the light intensity of the emitted light.
Also, for example, when the wavelength used as the wavelength of the single-wavelength light emitting unit in a certain crop is effective as the wavelength of the auxiliary light-emitting unit in another type of crop, the single-wavelength light emission is performed according to the selected crop. The light emission part combination data that is a combination of the roles of the light emission part and the auxiliary light emission part may be included.
さらに、単波長光射出部及び補助光射出部は、ＬＥＤ等の光源に限られず、光源と接続された光ファイバー等からなる光伝達手段の先端、又は、光源からの光を通過させる穴や透明部材等であってもよい。光検出部は、フォトダイオード等の受光素子に限られず、受光素子と接続された光ファイバー等からなる光伝達手段の先端、又は、受光素子へと光を通過させる穴や透明部材等であってもよい。 Furthermore, the single-wavelength light emitting part and the auxiliary light emitting part are not limited to light sources such as LEDs, but the tip of a light transmission means composed of an optical fiber or the like connected to the light source, or a hole or a transparent member through which light from the light source passes. Etc. The light detection unit is not limited to a light receiving element such as a photodiode, but may be a tip of a light transmission means including an optical fiber connected to the light receiving element, or a hole or a transparent member that allows light to pass to the light receiving element. Good.
内遮光壁及び外遮光壁は、農作物に密着又は近接させた際に外光を遮る機能を発揮するようにしたものであればよく、円筒形状又は同心円状の配置に限定されるものではない。また、測定に必要な光が通過できる範囲内において先端開口をすぼめてもよい。農作物の形状に応じて、外遮光壁の先端が内遮光壁の先端よりも突出するようにしてもよいし、逆に、内遮光壁の先端が外遮光壁の先端よりも突出するようにしてもよい。 The inner light-shielding wall and the outer light-shielding wall are not limited to a cylindrical or concentric arrangement as long as the inner light-shielding wall and the outer light-shielding wall have a function of shielding the external light when brought into close contact with or close to the crop. Further, the tip opening may be narrowed within a range where light necessary for measurement can pass. Depending on the shape of the crop, the tip of the outer light-shielding wall may protrude from the tip of the inner light-shielding wall. Conversely, the tip of the inner light-shielding wall protrudes from the tip of the outer light-shielding wall. Also good.
配置面については、本実施形態においては平面としたが、すり鉢形状等であってもよい。 The arrangement surface is a flat surface in the present embodiment, but may be a mortar shape or the like.
その他、本発明はその趣旨を逸脱しない範囲で種々変形が可能である。 In addition, the present invention can be variously modified without departing from the spirit of the present invention.
１・・・屋外用内部品質測定装置
２・・・光検出部
３ａ、３ｂ、３ｃ、３ｄ・・・単波長光射出部
４・・・補助光射出部
１０・・・ボディ
１１・・・内遮光壁
１２・・・外遮光壁
１３・・・配置面
１４・・・測定開始スイッチ
１５・・・電源
DESCRIPTION OF SYMBOLS 1 ... Outdoor internal quality measuring device 2 ... Light detection part 3a, 3b, 3c, 3d ... Single wavelength light emission part 4 ... Auxiliary light emission part 10 ... Body 11 ... Inside Light shielding wall 12 ... Outer light shielding wall 13 ... Arrangement surface 14 ... Measurement start switch 15 ... Power supply
Claims (4)
前記ボディの一面から突出させた筒状をなす内遮光壁及び外遮光壁と、
前記内遮光壁の先端開口から入った光の強度を検出して、その強度に応じた値の光強度信号を出力する光検出部と、
前記内遮光壁と前記外遮光壁との間の配置面に配置され、それぞれがピーク波長の互いに異なる単波長の光を射出する複数の単波長光射出部とを具備し、
前記各単波長光射出部から射出される光の波長と異なる波長の光を射出する補助光射出部をさらに設け、前記補助光射出部を前記配置面上に配置するとともに、前記複数の単波長光射出部を順次切り替え、前記各単波長光射出部の点灯と同時に前記補助光射出部を点灯させて、
前記各単波長光射出部からの光に前記補助光射出部からの光が加算された光を前記農作物に照射し、前記農作物を透過して前記光検出部で検出された前記切り替えた回数分の光強度の相対値に基づいて前記農作物の内部品質を算出することを特徴とする屋外用農作物内部品質測定装置。 Body,
An inner light-shielding wall and an outer light-shielding wall having a cylindrical shape protruding from one surface of the body;
A light detection unit that detects the intensity of light entering from the tip opening of the inner light shielding wall and outputs a light intensity signal having a value corresponding to the intensity;
A plurality of single-wavelength light emitting portions that are arranged on an arrangement surface between the inner light-shielding wall and the outer light-shielding wall, each emitting single-wavelength light having different peak wavelengths,
An auxiliary light emitting unit that emits light having a wavelength different from the wavelength of the light emitted from each single wavelength light emitting unit is further provided, and the auxiliary light emitting unit is arranged on the arrangement surface, and the plurality of single wavelengths Switch the light emitting part sequentially, turn on the auxiliary light emitting part simultaneously with the lighting of each single wavelength light emitting part ,
Irradiates the crop with light obtained by adding the light from the auxiliary light emitting unit to the light from each single wavelength light emitting unit, passes through the crop, and corresponds to the number of times detected by the light detection unit. An outdoor crop internal quality measuring apparatus for calculating the internal quality of the crop based on the relative value of the light intensity of the outdoor crop.
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| JPH05288674A (en) * | 1992-04-09 | 1993-11-02 | Toshihiko Yoshikawa | Sacchari meter |
| DE4340072C2 (en) * | 1993-11-24 | 1996-05-15 | Siemens Ag | Device for examining tissue with light |
| JPH09243560A (en) * | 1996-03-13 | 1997-09-19 | Seibutsukei Tokutei Sangyo Gijutsu Kenkyu Suishin Kiko | Apparatus for evaluating internal quality of vegetables and fruits |
| JPH1137930A (en) * | 1997-07-14 | 1999-02-12 | Tokimec Inc | Absorptiometer |
| JP2000088747A (en) * | 1998-09-16 | 2000-03-31 | Takaya Corp | Meter for degree of ripeness |
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