JP2000028544A - Near-infrared ray type foreign material inspection device - Google Patents
Near-infrared ray type foreign material inspection deviceInfo
- Publication number
- JP2000028544A JP2000028544A JP19268998A JP19268998A JP2000028544A JP 2000028544 A JP2000028544 A JP 2000028544A JP 19268998 A JP19268998 A JP 19268998A JP 19268998 A JP19268998 A JP 19268998A JP 2000028544 A JP2000028544 A JP 2000028544A
- Authority
- JP
- Japan
- Prior art keywords
- infrared
- tobacco
- raw material
- tobacco raw
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、葉たばこの葉肉の
部分や中骨の部分およびこれらを裁刻したたばこ刻み等
のたばこ原料を供給する行程において、近赤外線の反射
および吸収特性を利用して、たばこ原料中に混入してい
る異物を検出する近赤外線式異物検出装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention utilizes near-infrared reflection and absorption characteristics in the process of supplying tobacco raw materials such as the tobacco portion and the midbone portion of leaf tobacco and the tobacco cuts obtained by cutting these portions. The present invention relates to a near-infrared type foreign matter detection device for detecting foreign matter mixed in tobacco raw materials.
【０００２】[0002]
【従来の技術】従来、たばこ製造工程における原料処理
工程では、乾燥済みの葉たばこを調湿機を経て除骨装置
に供給し、除骨装置でラミナの部分（葉肉の部分）と中
骨の部分に分け、ラミナと中骨をそれぞれケース詰めす
る。また、原料加工工程では、ケース詰め原料（ラミナ
または中骨）を解包し、調湿した後、サイロでブレンド
し、裁刻機に供給する。そして、裁刻機でたばこ刻に裁
刻し、この刻みはたばこ巻上げ機に供給する。2. Description of the Related Art Conventionally, in a raw material processing step in a tobacco manufacturing process, dried leaf tobacco is supplied to a bone removing device via a humidity controller, and the lamina portion (leaf portion) and the central bone portion are supplied to the bone removing device. And lamina and bone are packed in each case. In the raw material processing step, the case-packed raw material (lamina or medium bone) is unpacked, humidified, blended in a silo, and supplied to a cutting machine. Then, it is cut into tobacco by a cutting machine, and the cut is supplied to a tobacco winding machine.
【０００３】[0003]
【発明が解決しようとする課題】このような原料処理工
程や原料加工工程において、ラミナ、中骨およびたばこ
刻（たばこ原料）に異物が混入する場合があり、この異
物を除去する必要がある。このような異物には、金属
類、プラスチック類、紙、ゴム、たばこ以外の植物など
があるが、磁気金属類の異物については全て排除できる
装置が導入されている。しかし、上記その他の異物につ
いては、これを検出する装置の製造コストが高く、その
信頼性に欠けるので、異物検出装置が導入されるケース
が少ない。In such a raw material processing step and a raw material processing step, foreign matter may be mixed into lamina, bone, and tobacco cut (tobacco raw material), and it is necessary to remove the foreign matter. Such foreign substances include metals, plastics, paper, rubber, plants other than tobacco, and the like, and a device capable of eliminating all foreign substances of magnetic metals has been introduced. However, since the manufacturing cost of a device for detecting the above-mentioned other foreign substances is high and the reliability thereof is low, there are few cases in which a foreign substance detecting device is introduced.
【０００４】本発明は、葉たばこの葉肉の部分や中骨の
部分およびこれらを裁刻したたばこ刻み等のたばこ原料
を供給する行程において、近赤外線の反射および吸収特
性を利用して、たばこ原料中に混入している異物を効率
よく検出することを課題とする。According to the present invention, in the process of supplying tobacco raw materials, such as leaf and tobacco portions of leaf tobacco, and tobacco cuts obtained by cutting these portions, the tobacco raw material is made utilizing near infrared ray reflection and absorption characteristics. It is an object to efficiently detect a foreign substance mixed in a material.
【０００５】[0005]
【課題を解決するための手段】上記の課題を解決するた
めになした本発明の請求項１の近赤外線式異物検出装置
は、たばこ原料を移送する移送手段と、該移送手段で移
送されるたばこ原料に近赤外線を照射する照射手段と、
前記たばこ原料の近赤外線を照射した部分の近赤外線の
画像を撮像する撮像手段と、該撮像手段で得られた画像
情報から前記たばこ原料の撮像部分における近赤外線の
２次元の吸光度の分布を求め、該吸光度の分布に基づい
て前記たばこ原料中の異物の有無を判定する判定手段
と、を備えたことを特徴とする。According to a first aspect of the present invention, there is provided a near-infrared type foreign matter detecting apparatus for transferring a tobacco material, and a transfer means for transferring the tobacco material. Irradiation means for irradiating the tobacco raw material with near infrared rays,
Imaging means for imaging a near-infrared image of a portion of the tobacco raw material irradiated with near-infrared light; and obtaining a two-dimensional absorbance distribution of near-infrared light in the imaging part of the tobacco raw material from image information obtained by the imaging means. Determining means for determining the presence or absence of a foreign substance in the tobacco raw material based on the distribution of the absorbance.
【０００６】上記のように構成された請求項１の近赤外
線式異物検出装置によれば、移送手段で移送されるたば
こ原料に近赤外線照射手段で近赤外線が照射され、撮像
手段は、このたばこ原料からの近赤外線から２次元の画
像を撮像する。そして、判定手段は、撮像手段で得られ
た画像情報からたばこ原料の撮像部分における近赤外線
の２次元の吸光度の分布を求め、この吸光度の分布に基
づいてたばこ原料中の異物の有無を判定する。According to the near-infrared type foreign matter detection device of the first aspect, the tobacco raw material transferred by the transfer means is irradiated with near-infrared light by the near-infrared irradiation means, and the imaging means is provided by the tobacco imaging means. A two-dimensional image is taken from near-infrared light from raw materials. The determining means obtains a two-dimensional absorbance distribution of near-infrared light in the tobacco raw material imaging part from the image information obtained by the imaging means, and determines the presence or absence of foreign matter in the tobacco raw material based on the absorbance distribution. .
【０００７】たばこ原料と、たばこ原料以外の異物とで
は組成が異なっているので近赤外線の吸光度も異なる。
また、たばこ原料と似たような色の異物でも吸光度が異
なったものとなる。したがって、たばこ原料の近赤外線
を照射した部分の２次元の吸光度の分布は、たばこ原料
に対応する部分と異物に対応する部分とで異なったもの
となり、この吸光度の分布から異物を検出することがで
きる。また、たばこ原料についての吸光度がわかってい
るので、このたばこ原料と異なる異物であれば多種類の
異物でも一度に検出できる可能性が極めて高い。また、
吸光度の分布は２次元の画像に対応しているので、一度
に広い範囲の異物検出を行うことができ、移送中のたば
こ原料でも、ほとんど異物を見逃すことがない。[0007] Since the composition of the tobacco raw material differs from that of the foreign substance other than the tobacco raw material, the absorbance of near-infrared rays also differs.
Further, even a foreign substance having a color similar to that of the tobacco raw material has a different absorbance. Therefore, the two-dimensional absorbance distribution of the portion of the tobacco raw material irradiated with near-infrared light is different between the portion corresponding to the tobacco raw material and the portion corresponding to the foreign material, and it is possible to detect the foreign material from the distribution of the absorbance. it can. In addition, since the absorbance of the tobacco raw material is known, there is a very high possibility that even foreign substances different from the tobacco raw material can be detected at once even with various kinds of foreign substances. Also,
Since the absorbance distribution corresponds to a two-dimensional image, foreign substances can be detected in a wide range at a time, and almost no foreign substances are missed even in the tobacco material being transported.
【０００８】本発明の請求項２の近赤外線式異物検出装
置は、請求項１の構成を備え、前記撮像手段で受光する
近赤外線を、波長が１．５８μｍおよび波長が１．７３
μｍの２種類の近赤外線とし、前記判定手段は該２種類
の近赤外線の吸光度の差から前記異物の有無を判定する
ことを特徴とする。According to a second aspect of the present invention, there is provided a near-infrared type foreign matter detection device having the configuration of the first aspect, wherein the near-infrared ray received by the imaging means has a wavelength of 1.58 μm and a wavelength of 1.73.
The two types of near-infrared rays of μm are used, and the determination means determines the presence or absence of the foreign matter based on a difference in absorbance of the two types of near-infrared rays.
【０００９】図２に示したように、たばこ原料は波長が
１．５８μｍおよび１．７３μｍの２種類の近赤外線に
対して略同じ反射率を持っているが、異物の中にはこの
２種類の近赤外線に対して反射率が顕著に異なるものが
多い。したがって、上記のように構成された請求項２の
近赤外線式異物検出装置によれば、請求項１と同様な作
用効果が得られるとともに、判定手段は、上記２種類の
近赤外線の吸光度に差がなければたばこ原料だけであ
り、差があれば異物が存在するとして、異物を検出する
こができる。As shown in FIG. 2, the tobacco raw material has substantially the same reflectance with respect to two kinds of near infrared rays having wavelengths of 1.58 μm and 1.73 μm. Many have significantly different reflectances for near infrared rays. Therefore, according to the near-infrared type foreign matter detection device of the second aspect configured as described above, the same operation and effect as those of the first aspect can be obtained, and the determination means determines the difference between the absorbances of the two types of near-infrared rays. If there is no, there is only a tobacco material, and if there is a difference, it is determined that there is a foreign substance, and the foreign substance can be detected.
【００１０】本発明の請求項３の近赤外線式異物検出装
置は、請求項１または請求項２の構成を備え、前記移送
手段は、前記たばこ原料を滑落させる傾斜面とされた鏡
面を有し、前記照射手段は鏡面に向けて前記近赤外線を
照射することを特徴とする。According to a third aspect of the present invention, there is provided a near-infrared type foreign matter detecting device having the structure of the first or second aspect, wherein the transfer means has a mirror surface having an inclined surface for sliding down the tobacco raw material. The irradiating means irradiates the near-infrared ray toward a mirror surface.
【００１１】上記のように構成された請求項３の近赤外
線式異物検出装置によれば、請求項１または請求項２と
同様な作用効果が得られるとともに、移送手段の鏡面を
滑落するたばこ原料の隙間や該たばこ原料を透過した近
赤外線は、鏡面によりたばこ原料側に反射されるので、
照射する近赤外線を有効に利用できる。According to the near-infrared type foreign matter detection device of the third aspect, the same effect as that of the first or second aspect is obtained, and the tobacco raw material which slides down the mirror surface of the transfer means. Near-infrared light transmitted through the gap or the tobacco raw material is reflected by the mirror surface to the tobacco raw material side,
The irradiating near infrared rays can be used effectively.
【００１２】[0012]
【発明の実施の形態】図１は本発明の一実施の形態の近
赤外線式異物検出装置を適用した異物検出排除システム
の概略図および要部ブロック図である。第１移送手段１
はベルトコンベアで構成されており、たばこ原料である
たばこ刻２を載置して図の矢印の方向に搬送する。第
１移送手段１の搬送路の終端には角度が略４５度で傾斜
した鏡面としての反射ミラー４が配設されており、第１
移送手段１で搬送されたたばこ刻２は反射ミラー４の上
面を滑落して、この反射ミラー４の下端から落下する。
なお、この実施の形態では第１移送手段１と傾斜した反
射ミラー４が請求項１の移送手段を構成している。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic diagram and a main block diagram of a foreign matter detection and elimination system to which a near-infrared foreign matter detection device according to one embodiment of the present invention is applied. First transfer means 1
Is constituted by a belt conveyor, on which a tobacco cut 2 as a tobacco raw material is placed and transported in the direction of the arrow in the figure. At the end of the transport path of the first transfer means 1, a reflection mirror 4 as a mirror surface inclined at an angle of about 45 degrees is disposed.
The tobacco cut 2 conveyed by the transfer means 1 slides down the upper surface of the reflection mirror 4 and falls from the lower end of the reflection mirror 4.
In this embodiment, the first transfer means 1 and the inclined reflecting mirror 4 constitute the transfer means of claim 1.
【００１３】反射ミラー４の下方には、排除機構７およ
び第２移送手段６が配設されている。排除機構７は、反
射ミラー４の下端近傍から第１移送手段１側に延びる排
除コンベア７１と、この排除コンベア７１全体を図の矢
印の方向に往復移動させる駆動装置７２で構成されて
おり、たばこ刻２内に異物が検出されると、その異物を
たばこ刻２ごと異物ボックス５に排除する。すなわち、
異物検出信号が駆動装置７２に与えられると、駆動装置
７２は排除コンベア７１を図１において右側に移動す
る。これにより、排除コンベア７１は反射ミラー４から
落下するたばこ刻２を受け止めて図の矢印の方向に搬
送し、このたばこ刻２を異物ボックス５内に排除する。Below the reflection mirror 4, an elimination mechanism 7 and a second transfer means 6 are provided. The exclusion mechanism 7 includes an exclusion conveyor 71 extending from the vicinity of the lower end of the reflection mirror 4 to the first transfer means 1 side, and a driving device 72 for reciprocating the entire exclusion conveyor 71 in the direction of the arrow in FIG. When a foreign substance is detected in the stamp 2, the foreign substance is removed to the foreign substance box 5 together with the tobacco stamp 2. That is,
When the foreign object detection signal is given to the driving device 72, the driving device 72 moves the reject conveyor 71 to the right in FIG. Thus, the exclusion conveyor 71 receives the tobacco cut 2 falling from the reflection mirror 4 and transports it in the direction of the arrow in the drawing, and removes the tobacco cut 2 into the foreign matter box 5.
【００１４】一方、異物検出信号が無く排除動作を行わ
ないときには、駆動装置７２は排除コンベア７１を図１
において左側に移動して、排除コンベア７１を反射ミラ
ー４の下端から反射ミラー４の下方に収納する。これに
より、反射ミラー４から落下するたばこ刻２は第２移送
手段６上にそのまま落下供給される。第２移送手段６は
ベルトコンベアで構成されており、供給されたたばこ刻
２を載置して図の矢印の方向に搬送し、次工程に供給
する。On the other hand, when there is no foreign object detection signal and no exclusion operation is performed, the driving device 72 moves the exclusion conveyor 71 to the position shown in FIG.
And moves the reject conveyor 71 from the lower end of the reflection mirror 4 to a position below the reflection mirror 4. As a result, the tobacco cut 2 falling from the reflection mirror 4 is directly supplied onto the second transfer means 6 by dropping. The second transfer means 6 is constituted by a belt conveyor, and the supplied tobacco cut 2 is placed, transported in the direction of the arrow in the figure, and supplied to the next step.
【００１５】反射ミラー４と水平方向で対面する位置に
はハロゲンランプ３１を有する光源３が配設され、ま
た、反射ミラー４の上方にはこの撮像レンズ８１を下方
（反射ミラー４側）に向けた近赤外線ＣＣＤカメラ８が
配設されている。そして、光源３により反射ミラー４上
のたばこ刻２に光が照射され、近赤外線ＣＣＤカメラ８
により反射ミラー４上のたばこ刻２が撮像される。ま
た、反射ミラー４は、たばこ刻２の間隙を透過した光お
よびたばこ刻２を透過した光を反射し、この反射した光
は再びたばこ刻２で透過吸収されて近赤外線ＣＣＤカメ
ラ８に向けられる。A light source 3 having a halogen lamp 31 is disposed at a position facing the reflection mirror 4 in the horizontal direction, and the image pickup lens 81 is directed downward (toward the reflection mirror 4) above the reflection mirror 4. A near-infrared CCD camera 8 is provided. The light source 3 irradiates the tobacco cut 2 on the reflection mirror 4 with light, and the near infrared CCD camera 8
Thereby, the tobacco cut 2 on the reflection mirror 4 is imaged. The reflecting mirror 4 reflects the light transmitted through the gap of the tobacco cut 2 and the light transmitted through the tobacco cut 2, and the reflected light is transmitted and absorbed again by the tobacco cut 2 and directed to the near-infrared CCD camera 8. .
【００１６】近赤外線ＣＣＤカメラ８は、撮像レンズ８
１の後方に、特定の近赤外線を分光する分光手段８２
と、近赤外線を感知するＣＣＤ受光素子８３を備えてお
り、撮像レンズ８１で集光した光を分光手段８２を介し
てＣＣＤ受光素子８３に集光し、このＣＣＤ受光素子の
受光面上に近赤外線によるたばこ刻２の像を結像する。
すなわち、光源３は近赤外線を含む光を放射するもので
あり、この光源３は請求項１の近赤外線照射手段を構成
している。また、近赤外線ＣＣＤカメラ８の分光手段８
２は特定波長域の近赤外線を選択的に分光してＣＣＤ受
光素子８３に導光するものであり、この近赤外線ＣＣＤ
カメラ８は、請求項１の撮像手段を構成している。The near-infrared CCD camera 8 includes an imaging lens 8
Behind 1, a spectroscopic means 82 for dispersing a specific near infrared ray
And a CCD light-receiving element 83 for sensing near-infrared light. The light condensed by the imaging lens 81 is condensed on the CCD light-receiving element 83 through the spectroscopic means 82, and is close to the light-receiving surface of the CCD light-receiving element. An image of tobacco cut 2 is formed by infrared rays.
That is, the light source 3 emits light including near-infrared rays, and this light source 3 constitutes near-infrared ray irradiating means of the first aspect. Further, the spectral means 8 of the near-infrared CCD camera 8
Numeral 2 is for selectively dispersing near-infrared light in a specific wavelength region and guiding the light to the CCD light receiving element 83.
The camera 8 constitutes the imaging means of the first aspect.
【００１７】分光手段８２は、透過性プリズムで構成さ
れており、プリズムである範囲の波長の光を分離する。
分離された波長の光をそれぞれＣＣＤ受光素子８３に照
射する。分光波長のうち波長が１．５８μｍの狭波長域
の近赤外線と波長が１．７３μｍの狭波長域の近赤外線
は、それぞれＣＣＤ受光素子８３で受光後、画像処理部
１４をへて、データ処理部１２で処理し、その差を検出
し異物を識別のために利用される。The spectroscopy means 82 is composed of a transmissive prism, and separates light having a wavelength within a range of the prism.
The light having the separated wavelength is irradiated on the CCD light receiving element 83. The near-infrared rays in the narrow wavelength range of 1.58 μm and the near-infrared rays in the narrow wavelength range of 1.73 μm of the spectral wavelengths are received by the CCD light-receiving element 83, respectively, and then transmitted to the image processing unit 14 for data processing. The processing is performed by the unit 12, the difference is detected, and the difference is used for identifying the foreign matter.
【００１８】ＣＣＤ受光素子８３の受光面は所定の解像
度を成す２次元配列の画素で構成され、各画素における
受光量に応じたアナログ信号を出力する。ＡＤ変換器１
１は、ＣＣＤ受光素子８３の各画素毎の受光量に応じた
出力信号をデジタルデータに変換し、画像処理部１４に
出力する。なお、画像処理部１４および後述のデータ処
理部１２はパーソナルコンピュータで構成されている。
画像処理部１４は、２種類の近赤外線に対応する少なく
とも２フレーム分の画像記憶領域を備えており、分光手
段８２における近赤外線の切換えタイミングに基づい
て、波長が１．５８μｍの近赤外線による１フレーム分
の画像データと、波長が１．７３μｍの近赤外線による
１フレーム分の画像データをそれぞれ取り込んで対応す
る画像記憶領域に記憶する。なお、上記の画像データ
は、各画素における受光量を数値に変換した数値データ
である。The light receiving surface of the CCD light receiving element 83 is composed of two-dimensionally arranged pixels having a predetermined resolution, and outputs an analog signal corresponding to the amount of light received at each pixel. AD converter 1
1 converts an output signal corresponding to the amount of received light of each pixel of the CCD light receiving element 83 into digital data and outputs the digital data to the image processing unit 14. Note that the image processing unit 14 and the data processing unit 12 described later are configured by a personal computer.
The image processing unit 14 includes an image storage area for at least two frames corresponding to two types of near infrared rays. The image data for one frame and the image data for one frame of near infrared rays having a wavelength of 1.73 μm are fetched and stored in the corresponding image storage areas. The image data is numerical data obtained by converting the amount of light received at each pixel into a numerical value.
【００１９】データ処理部１２は、画像処理部１４の２
つのフレームの画像データを取り込み、各画素毎に両画
像データの数値データの差分を演算し、各画素毎に差分
の値を予め設定したしきい値と比較する。そして、差分
がしきい値を越えるような画素があれば、異物検出と判
定し、異物検出信号を排除機構７に出力する。そして、
異物が排除コンベア７１で排除されるタイミングをみは
からって異物検出信号を停止し、排除機構７で排除コン
ベア７１を反射ミラー４の下端から反射ミラー４の下方
に収納する。The data processing unit 12 has a function of the image processing unit 14.
The image data of one frame is fetched, the difference between the numerical data of both image data is calculated for each pixel, and the difference value is compared with a preset threshold value for each pixel. If there is a pixel whose difference exceeds the threshold value, it is determined that foreign matter has been detected, and a foreign matter detection signal is output to the elimination mechanism 7. And
The foreign matter detection signal is stopped at a timing when the foreign matter is eliminated by the elimination conveyor 71, and the elimination mechanism 71 stores the elimination conveyor 71 from the lower end of the reflection mirror 4 to below the reflection mirror 4.
【００２０】図２は、たばこ刻、コンベアベルト（裏部
材と表部材）、輪ゴムおよび黒色ゴムの各物質について
の１．００μｍ〜２．５０μｍの波長域の近赤外線に対
する反射率を示す図である。波長が１．７３μｍの近赤
外線に対しては、たばこ刻の反射率に対して、コンベア
ベルト（裏部材と表部材）、輪ゴムおよび黒色ゴムの反
射率は大きくかけ離れている。一方、波長が１．５８μ
ｍの近赤外線に対しては、たばこ刻の反射率は波長が
１．７３μｍの近赤外線に対する反射率と同程度である
が、コンベアベルト（裏部材と表部材）および輪ゴムに
ついては、波長が１．７３μｍの近赤外線に対する反射
率よりもかなり大きくなっている。FIG. 2 is a diagram showing the reflectance of near-infrared rays in the wavelength range of 1.00 μm to 2.50 μm for each of the tobacco cut, the conveyor belt (back and front members), rubber bands and black rubber. . With respect to near-infrared rays having a wavelength of 1.73 μm, the reflectances of the conveyor belt (back and front members), the rubber band, and the black rubber are greatly different from the reflectance of the tobacco cut. On the other hand, the wavelength is 1.58μ.
m near infrared rays, the reflectance of the tobacco cut is about the same as that of the near infrared rays having a wavelength of 1.73 μm, but for the conveyor belt (back and front members) and rubber bands, the wavelength is 1. It is much larger than the reflectivity for near infrared rays of .73 μm.
【００２１】したがって、１．７３μｍの近赤外線の吸
光度と１．５８μｍの近赤外線の吸光度の差（絶対値）
は、たばこ刻では殆ど０であり、コンベアベルト（裏部
材と表部材）および輪ゴムでは大きな値となる。これを
画像として表示すると例えば図３のようになる。そこ
で、検出される吸光度の差と比較する前記のしきい値を
たばこ刻の吸光度の差とコンベアベルト（裏部材と表部
材）および輪ゴムの各々吸光度の差との中間の値に設定
しておき、コンベアベルト（裏部材と表部材）および輪
ゴムを排除する。Therefore, the difference (absolute value) between the absorbance of the near-infrared ray of 1.73 μm and the absorbance of the near-infrared ray of 1.58 μm
Is almost 0 in the case of tobacco cutting, and is a large value in the case of a conveyor belt (back and front members) and rubber bands. When this is displayed as an image, it becomes, for example, as shown in FIG. Therefore, the above-mentioned threshold value to be compared with the difference in absorbance detected is set to a value intermediate between the difference in absorbance in tobacco cuts and the difference in absorbance between the conveyor belt (back member and front member) and the rubber band. , Conveyor belts (back and front members) and rubber bands are eliminated.
【００２２】なお、黒色ゴムは反射率が殆ど０で、１．
７３μｍと１．５８μｍの近赤外線の吸光度の差も殆ど
０である。そこで、例えば上記の何れか一方の波長の近
赤外線により吸光度を比較する。これを画像として表示
すると例えば図４のようになる。そこで、たばこ刻の吸
光度と黒色ゴムの吸光度の差が大きく離れている場合
に、異物検出信号を出力するようにすれば、黒色ゴムで
も排除できる。The black rubber has a reflectance of almost 0 and 1.
The difference between the absorbances of 73 μm and 1.58 μm near infrared rays is almost zero. Therefore, for example, the absorbance is compared with near infrared rays of any one of the above wavelengths. When this is displayed as an image, for example, it is as shown in FIG. Therefore, if the difference between the absorbance of the tobacco cut and the absorbance of the black rubber is largely apart, the black rubber can be eliminated by outputting the foreign substance detection signal.
【００２３】以上の実施形態ではたばこ原料としてたば
こ刻の場合について説明したが、本発明は中骨やラミナ
などのたばこ原料にも適用できる。In the above embodiment, the case of tobacco chopping as the tobacco raw material has been described. However, the present invention can also be applied to tobacco raw materials such as bone and lamina.
【００２４】また、上記の実施形態では、光源３に白色
光源を用いるとともに、近赤外線ＣＣＤカメラ８のフィ
ルタ８２で近赤外線を分光することにより、たばこ刻に
おける近赤外線の吸光度を求めるようにしているので、
たばこ刻に照明が当てられていることを目視できるが、
これに限らず、光源側に近赤外線を分光する手段を用い
るようにしてもよい。In the above-described embodiment, the white light source is used as the light source 3 and the near-infrared ray is spectrally separated by the filter 82 of the near-infrared CCD camera 8, thereby obtaining the absorbance of the near-infrared ray in the tobacco cut. So
You can see that the tobacco is illuminated,
However, the present invention is not limited to this, and a means for dispersing near infrared rays may be used on the light source side.
【００２５】[0025]
【発明の効果】以上説明したように本発明の近赤外線式
異物検出装置によれば、移送手段で移送されるたばこ原
料に近赤外線を照射し、このたばこ原料の近赤外線を照
射した部分の近赤外線の画像を撮像し、その画像情報か
らたばこ原料の撮像部分における近赤外線の２次元の吸
光度の分布を求め、この吸光度の分布に基づいてたばこ
原料中の異物の有無を判定するようにしたので、たばこ
原料と異なる異物であれば多種類の異物でも一度に検出
できる可能性が極めて高くなり、さらに、吸光度の分布
は２次元の画像に対応しているので、一度に広い範囲の
異物検出を行うことができ、移送中のたばこ原料でも、
ほとんど異物を見逃すことがない。したがって、たばこ
原料中に混入している異物を効率よく検出することがで
きる。As described above, according to the near-infrared foreign matter detection device of the present invention, the tobacco material transferred by the transfer means is irradiated with near-infrared light, and the near-infrared portion of the tobacco material is irradiated with near-infrared light. Since the infrared image was taken, the near-infrared two-dimensional absorbance distribution in the tobacco raw material imaging part was obtained from the image information, and the presence or absence of foreign matter in the tobacco raw material was determined based on the absorbance distribution. In addition, the possibility of detecting many types of foreign substances at once is extremely high if the foreign substances are different from tobacco raw materials. Furthermore, the absorbance distribution corresponds to a two-dimensional image, so that a wide range of foreign substances can be detected at one time. Can be carried out, even with tobacco raw materials in transit,
Almost no foreign objects are missed. Therefore, it is possible to efficiently detect the foreign matter mixed in the tobacco raw material.
【００２６】また、本発明の請求項２の近赤外線式異物
検出装置によれば、撮像手段で受光する近赤外線を、波
長が１．５８μｍおよび波長が１．７３μｍの２種類の
近赤外線とし、この２種類の近赤外線の吸光度の差から
異物の有無を判定するようにしたので、この２種類の近
赤外線の吸光度の差はたばこ原料では小さいので、この
近赤外線に対して反射率が顕著に異なるような複数の異
物を検出するこができる。According to the near-infrared type foreign matter detecting device of the present invention, the near-infrared rays received by the imaging means are two kinds of near-infrared rays having a wavelength of 1.58 μm and a wavelength of 1.73 μm, Since the presence or absence of a foreign substance is determined based on the difference between the absorbances of the two kinds of near infrared rays, the difference in the absorbance of the two kinds of near infrared rays is small in a tobacco raw material. A plurality of different foreign substances can be detected.
【００２７】また、本発明の請求項３の近赤外線式異物
検出装置によれば、移送手段においてたばこ原料を滑落
させる傾斜面とされた鏡面を備え、この鏡面に向けて近
赤外線を照射するようにしたので、鏡面を滑落するたば
こ原料の隙間や該たばこ原料を透過した近赤外線を鏡面
によりたばこ原料側に反射することができ、照射する近
赤外線を有効に利用できる。According to the near-infrared type foreign matter detection device of the third aspect of the present invention, the transfer means is provided with a mirror surface having an inclined surface for sliding down the tobacco raw material, and the mirror surface is irradiated with near-infrared light. Therefore, the gap between the tobacco raw materials sliding down the mirror surface and the near-infrared ray transmitted through the tobacco raw material can be reflected by the mirror surface to the tobacco raw material side, and the near-infrared rays to be irradiated can be used effectively.
【図１】本発明の一実施の形態の近赤外線式異物検出装
置を適用した異物検出排除システムの概略図および要部
ブロック図である。FIG. 1 is a schematic diagram and a main block diagram of a foreign matter detection and elimination system to which a near-infrared type foreign matter detection device according to an embodiment of the present invention is applied.
【図２】たばこ刻、コンベアベルト（裏部材と表部
材）、輪ゴムおよび黒色ゴムの各物質についての１．０
０μｍ〜２．５０μｍの波長域の近赤外線に対する反射
率を示す図である。FIG. 2 shows 1.0 for each substance of tobacco cutting, conveyor belt (back and front members), rubber band and black rubber.
It is a figure which shows the reflectance with respect to near-infrared rays in the wavelength range of 0 micrometer-2.50 micrometers.
【図３】実施の形態における吸光度の差の分布を画像表
示した例を示す図である。FIG. 3 is a diagram showing an example in which the distribution of absorbance differences in the embodiment is displayed as an image.
【図４】実施の形態における吸光度の分布を画像表示し
た例を示す図である。FIG. 4 is a diagram showing an example in which the distribution of absorbance in the embodiment is displayed as an image.
２…たばこ刻（たばこ原料）、３…光源、４…反射ミラ
ー、８…近赤外線ＣＣＤカメラ、１２…データ処理部、
１４…画像処理部。2 ... tobacco cutting (tobacco raw material), 3 ... light source, 4 ... reflection mirror, 8 ... near infrared CCD camera, 12 ... data processing unit,
14: Image processing unit.
─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成１１年７月８日（１９９９．７．８）[Submission date] July 8, 1999 (1999.7.8)
【手続補正１】[Procedure amendment 1]
【補正対象書類名】図面[Document name to be amended] Drawing
【補正対象項目名】図２[Correction target item name] Figure 2
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【図２】 FIG. 2
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 2G051 AA90 AB01 AB20 BA06 BA08 BA20 CA03 CA04 CB02 DA06 DA13 EA08 EA12 EA14 EB01 EB02 ED07 2G059 AA05 BB15 CC20 DD12 EE01 EE11 FF01 GG10 HH01 HH06 JJ06 JJ13 KK04 MM05 MM09 MM10 NN01 4B043 BA42 BA71 BA80 ──────────────────────────────────────────────────続 き Continuing on the front page F term (reference) 2G051 AA90 AB01 AB20 BA06 BA08 BA20 CA03 CA04 CB02 DA06 DA13 EA08 EA12 EA14 EB01 EB02 ED07 2G059 AA05 BB15 CC20 DD12 EE01 EE11 FF01 GG10 HH01 HH04 JJ06 MM13 NN13 MM06 BA71 BA80
Claims (3)
る照射手段と、 前記たばこ原料の近赤外線を照射した部分の近赤外線の
画像を撮像する撮像手段と、 該撮像手段で得られた画像情報から前記たばこ原料の撮
像部分における近赤外線の２次元の吸光度の分布を求
め、該吸光度の分布に基づいて前記たばこ原料中の異物
の有無を判定する判定手段と、を備えたことを特徴とす
る近赤外線式異物検出装置。1. A transferring means for transferring tobacco raw material, an irradiating means for irradiating the tobacco raw material transferred by the transferring means with near-infrared light, and capturing a near-infrared image of a portion of the tobacco raw material irradiated with near-infrared light. Imaging means for obtaining, a two-dimensional absorbance distribution of near-infrared rays in an imaging part of the tobacco raw material from image information obtained by the imaging means, and determining the presence or absence of foreign matter in the tobacco raw material based on the absorbance distribution. A near-infrared type foreign substance detection device, comprising: a determination unit;
長が１．５８μｍおよび波長が１．７３μｍの２種類の
近赤外線とし、前記判定手段は該２種類の近赤外線の吸
光度の差から前記異物の有無を判定することを特徴とす
る請求項１記載の近赤外線式異物検出装置。2. The near-infrared rays received by the imaging means are two kinds of near-infrared rays having a wavelength of 1.58 μm and a wavelength of 1.73 μm, and the determination means determines the near-infrared ray based on a difference in absorbance between the two kinds of near-infrared rays. The near-infrared type foreign object detection device according to claim 1, wherein the presence or absence of a foreign object is determined.
させる傾斜面とされた鏡面を有し、前記照射手段は鏡面
に向けて前記近赤外線を照射することを特徴とする請求
項１または請求項２記載の近赤外線式異物検出装置。3. The method according to claim 1, wherein the transfer unit has a mirror surface having an inclined surface for sliding down the tobacco raw material, and the irradiation unit irradiates the near-infrared ray toward the mirror surface. Item 3. The near-infrared type foreign matter detection device according to Item 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19268998A JP2000028544A (en) | 1998-07-08 | 1998-07-08 | Near-infrared ray type foreign material inspection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19268998A JP2000028544A (en) | 1998-07-08 | 1998-07-08 | Near-infrared ray type foreign material inspection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000028544A true JP2000028544A (en) | 2000-01-28 |
Family
ID=16295417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19268998A Withdrawn JP2000028544A (en) | 1998-07-08 | 1998-07-08 | Near-infrared ray type foreign material inspection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000028544A (en) |
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| CN109513617A (en) * | 2018-11-09 | 2019-03-26 | 红塔烟草(集团)有限责任公司 | A kind of beating and double roasting sundries control method |
| CN109752343A (en) * | 2019-03-18 | 2019-05-14 | 山东金璋隆祥智能科技有限责任公司 | A kind of new method of AOTF near infrared spectrometer on-line checking original cigarette chemical component |
| CN112189877A (en) * | 2020-10-13 | 2021-01-08 | 燕山大学 | On-line detection method for tobacco shred impurities in tobacco production line |
| CN113533349A (en) * | 2021-07-19 | 2021-10-22 | 吴玉生 | Intelligent automatic tobacco shred impurity detecting and removing system |
| WO2023070724A1 (en) * | 2021-10-27 | 2023-05-04 | 江苏大学 | Method and apparatus for pulse spectrum online imaging detection of low-chromaticity-difference plastic foreign matters in tobacco shreds |
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| GB2618044B (en) * | 2021-10-27 | 2024-04-10 | Univ Jiangsu | Method and device for detecting plastic foreign objects with low chromaticity difference in shredded tobacco through online pulse spectral imaging |
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