JP2789846B2 - Fish sorting method and apparatus - Google Patents
Fish sorting method and apparatusInfo
- Publication number
- JP2789846B2 JP2789846B2 JP3119382A JP11938291A JP2789846B2 JP 2789846 B2 JP2789846 B2 JP 2789846B2 JP 3119382 A JP3119382 A JP 3119382A JP 11938291 A JP11938291 A JP 11938291A JP 2789846 B2 JP2789846 B2 JP 2789846B2
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- signal waveform
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Description
【０００１】[0001]
【産業上の利用分野】本発明は魚類の選別方法及びその
装置に係り、特に鮪等の大型魚類の脂肪分量を基準に選
別する魚類の選別方法及びその装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for selecting fish, and more particularly to a method and an apparatus for selecting fish based on the fat content of large fish such as tuna.
【０００２】[0002]
【従来の技術】従来、脂肪分量による鮪の選別方法は、
目視により行われている。即ち、熟練検査員が鮪の尾近
辺に於ける切断面の油身（脂肪分）分布状態を検査し、
その分布状態と量によって鮪本体に於ける脂肪分量を推
定している。また、筒状にくり抜いた鮪本体の身から脂
肪分の分布状態を検査して推定している方法もある。2. Description of the Related Art Conventionally, a method of sorting tuna based on fat content is as follows.
It is performed visually. That is, a skilled inspector inspects the distribution of oil body (fat) on the cut surface near the tail of the tuna,
The amount of fat in the tuna body is estimated based on the distribution and the amount. There is also a method of estimating the distribution of fat content from the body of a tuna body hollowed out in a cylindrical shape.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、従来の
脂肪分量による鮪の選別方法は、推定で行われているの
で、正確に選別することができないという欠点がある。
また、鮪本体の身を筒状にくり抜く従来の方法は、くり
抜いた傷から病菌が発生する等の衛生上の欠点がある。However, the conventional method for selecting tuna based on fat content has a drawback that it cannot be accurately selected because it is performed by estimation.
In addition, the conventional method of hollowing out the body of the tuna body into a cylindrical shape has disadvantages in hygiene such as the occurrence of germs from the hollowed out wound.
【０００４】本発明は、このような事情に鑑みてなされ
たもので、衛生上に於いて問題無く、且つ正確に脂肪分
量を計測して選別することができる魚類の選別方法及び
その装置を提供することを目的とする。[0004] The present invention has been made in view of such circumstances, and provides a method and apparatus for selecting fish that can accurately measure and sort fat content without problems in hygiene. The purpose is to do.
【０００５】[0005]
【課題を解決する為の手段】本発明は、前記目的を達成
する為に、水中搬送中の魚類に向けてＸ線を照射し、該
魚類のＸ線透過量をＸ線ラインセンサで検出し、Ｘ線ラ
インセンサで得られるＸ線透過信号波形から脂肪分に相
当する信号波形を抽出し、抽出された抽出信号波形の面
積に基づいて魚類を選別することを特徴とする。前記抽
出信号波形は、前記Ｘ線透過信号波形から該Ｘ線透過信
号波形のローパスフイルタ処理した波形を減算処理して
作成し、また、前記抽出信号波形面積は、前記抽出信号
波形を時間で積分することにより求める。In order to achieve the above object, the present invention irradiates a fish being transported underwater with X-rays, and detects the X-ray transmission amount of the fish with an X-ray line sensor. And extracting a signal waveform corresponding to fat from the X-ray transmission signal waveform obtained by the X-ray line sensor, and selecting fish based on the area of the extracted signal waveform. The extracted signal waveform is created by subtracting a low-pass filtered waveform of the X-ray transmission signal waveform from the X-ray transmission signal waveform, and the extracted signal waveform area is obtained by integrating the extracted signal waveform with time. Ask by doing.
【０００６】[0006]
【作用】本発明によれば、先ず、魚類を水路で水中搬送
して搬送中の魚類の位置を位置センサで検知する。次
に、前記位置センサからの検出情報に基づいてＸ線照射
装置から前記魚類に向けてＸ線を照射し、該魚類のＸ線
透過量をＸ線ラインセンサで検出する。次いで、このＸ
線ラインセンサで得られるＸ線透過信号波形から、脂肪
分に相当する信号波形を信号処理装置で抽出する。ここ
で前記抽出信号波形は、Ｘ線透過信号波形から該Ｘ線透
過信号波形のローパスフイルタ処理した波形を減算処理
して作成する。According to the present invention, first, fishes are transported underwater in a waterway, and the position of the fishes being transported is detected by a position sensor. Next, the fish is irradiated with X-rays from the X-ray irradiation device based on the detection information from the position sensor, and the X-ray transmission amount of the fish is detected by the X-ray line sensor. Then, this X
From the X-ray transmission signal waveform obtained by the X-ray line sensor, a signal waveform corresponding to fat is extracted by a signal processing device. Here, the extracted signal waveform is created by subtracting a low-pass filtered waveform of the X-ray transmission signal waveform from the X-ray transmission signal waveform.
【０００７】そして、演算処理装置で前記抽出波形面積
から脂肪分量を演算処理し、魚類本体に於ける脂肪分量
を計測する。ここで前記抽出信号波形面積は、前記抽出
信号波形を時間で積分して求める。[0007] Then, the arithmetic processing unit calculates the fat content from the extracted waveform area to measure the fat content in the fish body. Here, the extracted signal waveform area is obtained by integrating the extracted signal waveform with time.
【０００８】[0008]
【実施例】以下添付図面に従って本発明に係る魚類の選
別方法及びその装置の好ましい実施例について詳説す
る。図１は本発明に係る魚類の選別装置１０の実施例が
示され、水路１２がＸ線シールドボックス１４内を通過
するように配設されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a method and an apparatus for selecting fish according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows an embodiment of a fish sorting apparatus 10 according to the present invention, in which a water channel 12 is disposed so as to pass through an X-ray shield box 14.
【０００９】前記水路１２には、鮪１６を図中矢印方向
に水中搬送する為の水１８が流動される。また、前記Ｘ
線シールドボックス１４内にはＸ線照射装置２０が設け
られ、このＸ線照射装置２０はＸ線照射口を前記水路１
２中で水中搬送される前記鮪１６に向けて配置される。
このＸ線照射装置２０は、水路１２の下方に設置された
位置センサ２２が鮪１６の頭部１６ａを検知したタイミ
ングでＸ線を照射するように制御されると共に、尾部１
６ｂが通過したタイミングでＸ線の照射を停止するよう
に制御されている。In the water channel 12, water 18 for transporting the tuna 16 underwater in the direction of the arrow in the drawing flows. In addition, the X
An X-ray irradiator 20 is provided in the X-ray shield box 14.
It is arranged toward the tuna 16 which is transported underwater in 2.
The X-ray irradiator 20 is controlled so as to irradiate X-rays at the timing when the position sensor 22 installed below the water channel 12 detects the head 16a of the tuna 16, and the tail 1
X-ray irradiation is controlled to stop at the timing when 6b passes.
【００１０】一方、Ｘ線ラインセンサ２４がケーブル２
６を介して信号処理回路２８に接続される。このＸ線ラ
インセンサ２４は前記位置センサ２２の上流側に隣接し
て配設されると共に、前記鮪１６を透過したＸ線透過信
号を前記ケーブル２６を介して信号処理回路２８に入力
している。また、Ｘ線ラインセンサ２４は図２に示すよ
うに、１ｃｈからｎｃｈまでの複数のＸ線センサ素子２
４ａ、２４ａ…が鮪１６の搬送方向に対して直行する方
向に、且つ鮪１６の幅を充分に補うことのできる長さで
１列に配列して構成される。ここで、水１８と鮪１６の
赤身部分とはＸ線透過率が略同一なので、鮪１６外形に
よるＸ線透過率の変化を防止することができる。これに
より、前記Ｘ線ラインセンサ２４には鮪１６の骨と脂肪
部分を示すＸ線透過画像のみが入力されるので、前記信
号処理回路２８には、鮪１６の骨と脂肪部分を示すＸ線
透過信号が入力される。On the other hand, the X-ray line sensor 24
6 and is connected to a signal processing circuit 28. The X-ray line sensor 24 is disposed adjacent to the upstream side of the position sensor 22 and inputs an X-ray transmission signal transmitted through the tuna 16 to a signal processing circuit 28 via the cable 26. . As shown in FIG. 2, the X-ray line sensor 24 includes a plurality of X-ray sensor elements 2 from 1ch to nch.
Are arranged in a row in a direction perpendicular to the transport direction of the tuna 16 and with a length that can sufficiently compensate for the width of the tuna 16. Here, since the water 18 and the lean portion of the tuna 16 have substantially the same X-ray transmittance, a change in the X-ray transmittance due to the outer shape of the tuna 16 can be prevented. As a result, only the X-ray transmission image indicating the bones and fat portions of the tuna 16 is input to the X-ray line sensor 24, and the X-rays indicating the bones and fat portions of the tuna 16 are input to the signal processing circuit 28. A transmission signal is input.
【００１１】また、前記信号処理回路２８には演算処理
装置３０が接続される。この演算処理装置３０は、信号
処理回路２８で信号処理された画像信号を積分して面積
を計測することができる。次に、前記の如く構成された
魚類の選別装置の作用について説明する。先ず、鮪１６
を水路１２で水中搬送して鮪１６がセンサ２２で検出さ
れると、そのタイミングでＸ線照射装置２０からこの鮪
１６に向けてＸ線を照射する。この時、Ｘ線ラインセン
サ２４から信号処理回路２８に出力された出力信号は、
図３中実線ａで示すように、鮪１６の腹部の脂肪及び背
部の脂肪でＸ線透過量がその部分だけ多くなり凸状の波
形となる。また、鮪１６の脊椎等の骨の部分ではＸ線透
過量が少なくなり凹状の波形となる。ここで、前記凸状
波形の部分の面積は、鮪１６の脂肪分量と相関関係があ
るので、この面積を計測することで鮪１６の選別を行う
ことができる。An arithmetic processing unit 30 is connected to the signal processing circuit 28. The arithmetic processing device 30 can measure the area by integrating the image signal processed by the signal processing circuit 28. Next, the operation of the fish sorting apparatus configured as described above will be described. First, tuna 16
Is transported underwater in the water channel 12 and the tuna 16 is detected by the sensor 22. At that timing, the X-ray irradiator 20 irradiates the tuna 16 with X-rays. At this time, the output signal output from the X-ray line sensor 24 to the signal processing circuit 28 is
As shown by the solid line a in FIG. 3, the amount of X-ray transmission increases by the abdominal fat and the fat on the back of the tuna 16, resulting in a convex waveform. Also, the bone portion of the tuna 16 such as the spine has a reduced amount of X-ray transmission and has a concave waveform. Here, since the area of the portion of the convex waveform has a correlation with the fat content of the tuna 16, the tuna 16 can be sorted by measuring this area.
【００１２】前記凸状波形の面積を計測するには、先ず
前記実線ａの出力波形に基づいてローパスフイルタ処理
した波形（破線ｂ）を図１に示した信号処理回路２８で
作成する。次に、実線ａの出力波形から破線ｂの出力波
形の差をとり、図４に示す凸状波形部のみの波形を作成
する。次いで、この凸状波形部のみの波形を図１に示す
演算処理装置３０で積分してその面積値を求める。In order to measure the area of the convex waveform, first, a waveform (broken line b) obtained by low-pass filtering based on the output waveform of the solid line a is created by the signal processing circuit 28 shown in FIG. Next, a difference between the output waveform of the solid line a and the output waveform of the dashed line b is obtained, and a waveform of only the convex waveform portion shown in FIG. 4 is created. Next, the waveform of only the convex waveform portion is integrated by the arithmetic processing unit 30 shown in FIG. 1 to obtain the area value.
【００１３】前記面積値は、鮪１６の一断面に於ける脂
肪分量を示すものなので、鮪１６全体の脂肪分量を計測
する場合には、前述した位置センサ２２の検出信号をト
リガとして図５に示す如く、５回（何回でも良い）の走
査を実施してそれぞれ求められた面積値を加算する。こ
れによって、鮪１６全体に於ける脂肪分量を鮪１６を傷
つけることなく正確に計測することができる。Since the area value indicates the fat content in one section of the tuna 16, when the fat content of the whole tuna 16 is measured, the detection signal of the position sensor 22 described above is used as a trigger in FIG. As shown, five scans (or any number of scans) are performed, and the area values obtained respectively are added. Thereby, the fat content in the entire tuna 16 can be accurately measured without damaging the tuna 16.
【００１４】従って、本実施例によれば、脂肪分量を推
定して選別していた従来の魚類の選別方法と比較して、
衛生上に於いて問題無く、且つ正確に脂肪分量を計測す
ることができる。Therefore, according to the present embodiment, compared with the conventional method for selecting fishes, in which the amount of fat was estimated and selected,
The amount of fat can be accurately measured without any problem in hygiene.
【００１５】[0015]
【発明の効果】以上説明したように、本発明に係る魚類
の選別方法及びその装置によれば、水中搬送中の魚類に
向けてＸ線照射装置からＸ線を照射し、該魚類のＸ線透
過量をＸ線ラインセンサで検出し、Ｘ線ラインセンサで
得られるＸ線透過信号波形から脂肪分に相当する信号波
形のみを抽出し、抽出された前記抽出信号波形の面積に
基づいて魚類を選別するようにしたので、衛生上に於い
て問題無く、且つ正確に脂肪分量を計測して選別するこ
とができる。As described above, according to the method and apparatus for selecting fish according to the present invention, X-rays are emitted from an X-ray irradiator toward fishes being transported underwater, and the X-rays of the fishes are irradiated. The transmission amount is detected by an X-ray line sensor, and only a signal waveform corresponding to fat is extracted from the X-ray transmission signal waveform obtained by the X-ray line sensor, and fishes are detected based on the area of the extracted signal waveform. Since the selection is carried out, there is no problem in terms of hygiene, and the amount of fat can be accurately measured and selected.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明に係る魚類の選別装置の実施例を示す説
明図FIG. 1 is an explanatory view showing an embodiment of a fish sorting apparatus according to the present invention.
【図２】本発明に係る魚類の選別装置に適用されたＸ線
ラインセンサと鮪の位置関係を示す斜視図。FIG. 2 is a perspective view showing a positional relationship between an X-ray line sensor and a tuna applied to a fish sorting apparatus according to the present invention.
【図３】Ｘ線透過信号波形の実施例を示す説明図FIG. 3 is an explanatory diagram showing an embodiment of an X-ray transmission signal waveform.
【図４】脂肪分の抽出信号波形の実施例を示す説明図FIG. 4 is an explanatory diagram showing an embodiment of an extracted signal waveform of fat.
【図５】Ｘ線ラインセンサを複数回走査して鮪の脂肪分
の抽出信号波形を作成した説明図FIG. 5 is an explanatory diagram in which an X-ray line sensor is scanned a plurality of times to generate an extracted signal waveform of tuna fat.
１０…選別装置 １２…水路 １６…鮪 １８…水 ２０…Ｘ線照射装置 ２２…位置センサ ２４…Ｘ線ラインセンサ ２８…信号処理回路 ３０…演算処理回路 DESCRIPTION OF SYMBOLS 10 ... Sorting device 12 ... Water channel 16 ... Tuna 18 ... Water 20 ... X-ray irradiation device 22 ... Position sensor 24 ... X-ray line sensor 28 ... Signal processing circuit 30 ... Arithmetic processing circuit
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｇ０１Ｎ 23/08 Ｇ０１Ｎ 23/08 33/12 33/12 (58)調査した分野(Int.Cl.6，ＤＢ名) G01N 23/00 - 23/227 ＪＩＣＳＴファイル（ＪＯＩＳ)──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 identification symbol FI G01N 23/08 G01N 23/08 33/12 33/12 (58) Investigated field (Int.Cl. 6 , DB name) G01N 23 / 00-23/227 JICST file (JOIS)
Claims (4)
し、該魚類のＸ線透過量をＸ線ラインセンサで検出し、
Ｘ線ラインセンサで得られるＸ線透過信号波形から脂肪
分に相当する信号波形のみを抽出し、抽出された前記抽
出信号波形の面積に基づいて魚類を選別するようにした
ことを特徴とする魚類の選別方法。1. An X-ray is irradiated to a fish being transported underwater, and the X-ray transmission amount of the fish is detected by an X-ray line sensor.
Fish, characterized in that only a signal waveform corresponding to fat is extracted from an X-ray transmission signal waveform obtained by an X-ray line sensor, and fishes are selected based on the area of the extracted signal waveform extracted. Sorting method.
波形から該Ｘ線透過信号波形のローパスフイルタ処理し
た波形を減算処理して作成することを特徴とする請求項
１記載の魚類の選別方法。2. The fish sorter according to claim 1, wherein the extracted signal waveform is created by subtracting a low-pass filtered waveform of the X-ray transmission signal waveform from the X-ray transmission signal waveform. Method.
波形を時間で積分して求めることを特徴とする請求項１
記載の魚類の選別方法。3. The extraction signal waveform area is obtained by integrating the extraction signal waveform with time.
The method for selecting fish described in the above.
に水中搬送された魚類が所定の位置に搬送されたことを
検知する位置センサと、位置センサからの検出情報に基
づいて前記魚類に向けてＸ線を照射するＸ線照射装置
と、魚類のＸ線透過量を検知すると共に、前記水路の配
設方向に対して直行方向に並設されたＸ線ラインセンサ
と、Ｘ線ラインセンサで得られるＸ線透過信号波形から
脂肪分に相当する波形を抽出する信号処理装置と、前記
抽出波形面積から脂肪分量を演算処理する演算処理装置
と、から成ることを特徴とする魚類の選別装置。4. A waterway for transporting fish underwater, a position sensor for detecting that the fish transported underwater in the waterway has been transported to a predetermined position, and the fish based on detection information from the position sensor. An X-ray irradiating device that irradiates X-rays toward an X-ray line, an X-ray line sensor that detects the amount of X-ray transmission of fish, and is arranged in a direction perpendicular to the direction in which the water channel is arranged; A fish processing apparatus comprising: a signal processing device for extracting a waveform corresponding to fat from an X-ray transmission signal waveform obtained by a sensor; and an arithmetic processing device for calculating a fat content from the extracted waveform area. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3119382A JP2789846B2 (en) | 1991-04-23 | 1991-04-23 | Fish sorting method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3119382A JP2789846B2 (en) | 1991-04-23 | 1991-04-23 | Fish sorting method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04323537A JPH04323537A (en) | 1992-11-12 |
| JP2789846B2 true JP2789846B2 (en) | 1998-08-27 |
Family
ID=14760130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3119382A Expired - Lifetime JP2789846B2 (en) | 1991-04-23 | 1991-04-23 | Fish sorting method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2789846B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5481391B2 (en) * | 2008-01-17 | 2014-04-23 | ファンダシオン アスチ−アスチ ファンダシオア | Automated method and system for identifying and classifying foods |
| JP6356430B2 (en) * | 2014-02-20 | 2018-07-11 | 株式会社イシダ | Lipid content measuring device |
| ES2478420B1 (en) * | 2014-04-09 | 2015-06-02 | Tecnología Marina Ximo, S.L. | Automated system and procedure for classification of frozen tunas by species |
| JP6969719B2 (en) * | 2018-12-25 | 2021-11-24 | 東杜シーテック株式会社 | Estimator and estimation method |
| JP7381437B2 (en) * | 2020-12-17 | 2023-11-15 | アンリツ株式会社 | X-ray inspection equipment |
| CN113145483B (en) * | 2021-02-24 | 2023-06-23 | 陕西蒲城好邦食品有限公司 | Meat piece blood stain monitoring devices is used in chicken production |
-
1991
- 1991-04-23 JP JP3119382A patent/JP2789846B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04323537A (en) | 1992-11-12 |
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