JPH026020B2 - - Google Patents
Info
- Publication number
- JPH026020B2 JPH026020B2 JP54052280A JP5228079A JPH026020B2 JP H026020 B2 JPH026020 B2 JP H026020B2 JP 54052280 A JP54052280 A JP 54052280A JP 5228079 A JP5228079 A JP 5228079A JP H026020 B2 JPH026020 B2 JP H026020B2
- Authority
- JP
- Japan
- Prior art keywords
- tablet
- light
- scanning
- image
- image sensor
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 claims description 8
- 239000011159 matrix material Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 238000005429 filling process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/024—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by means of diode-array scanning
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Description
【発明の詳細な説明】
本発明は、PTP包装など成形充填包装工程に
おいて、プラスチツクフイルムに成形された多数
列のポケツトに対して充填された錠剤に欠けが伴
つていないかを高精度で検出する方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention detects with high precision whether or not the tablets filled into multiple rows of pockets formed in plastic film are chipped during the forming, filling and packaging process such as PTP packaging. Regarding how to.
PTP包装における帯状プラスチツクフイルム
上には、錠剤を充填させるためのポケツトが幅方
向に多数列成型されている。したがつて各列のポ
ケツトについて錠剤の欠損や欠落を監視する必要
が生ずる。このため、固体カメラなどの光学的検
出装置によつて多数列の錠剤の監視を行なう方法
が提供されたが、その方法では錠剤のうち僅かな
欠け（欠損）まで高精度に検出できない問題があ
つた。この理由の一つは、従来の検出方法におい
ては、検出すべき錠剤の影像面積を合計して検出
出力として記憶し、その検出出力を基準値と比較
するものであるため、影像面積に対して欠け部分
の面積の比率が低して検出感度が低下するためで
ある。 Pockets for filling tablets are molded in multiple rows in the width direction on the plastic film strip in PTP packaging. Therefore, it becomes necessary to monitor the pockets in each row for missing or missing tablets. For this reason, a method of monitoring multiple rows of tablets using an optical detection device such as a solid-state camera has been proposed, but this method has the problem of not being able to detect even the slightest chip (missing) in a tablet with high precision. Ta. One of the reasons for this is that in conventional detection methods, the image area of the tablet to be detected is summed and stored as a detection output, and the detection output is compared with a reference value. This is because the ratio of the area of the chipped portion is low and the detection sensitivity is reduced.
本発明の目的は、錠剤の中心を通る基準線の両
側における陰影像の横断線の長さを比較すること
によつて、予め基準信号を記憶させておくことな
く錠剤の欠けを検出できるようにすることであ
る。 An object of the present invention is to enable chipping of a tablet to be detected without storing a reference signal in advance by comparing the lengths of transverse lines of shadow images on both sides of a reference line passing through the center of the tablet. It is to be.
本発明は、光透過性フイルムの背後から光を照
射して該光透過性フイルムに形成されたポケツト
内に充填された錠剤の陰影像を該光透過性フイル
ムを挾んで反対側に配設されかつ走査点が線状一
次元マトリツクス状に配列されたイメージセンサ
上に映像させ、該陰影像を該イメージセンサによ
り電気信号に変換して該錠剤の欠けを検出する方
法において、該イメージセンサ上に走査速度を該
光透過性フイルムの移動速度に比較して速くして
該イメージセンサ上の走査線を該光透過性フイル
ムの移動方向に対してほぼ直角にし、該陰影像の
横断線の長さに対する走査出力を各錠剤の中心を
通る基準線の一方の側と他方の側とで比較して該
横断線の長さの対称性を判別し、それによつて該
錠剤の欠けを検出するように構成されている。 In the present invention, light is irradiated from behind a light-transmissive film, and a shadow image of a tablet filled in a pocket formed in the light-transmissive film is placed on the opposite side with the light-transparent film sandwiched therebetween. In the method of detecting chipping of the tablet by making an image on an image sensor in which scanning points are arranged in a linear one-dimensional matrix and converting the shadow image into an electric signal by the image sensor, The scanning speed is made faster than the moving speed of the light-transmitting film so that the scanning line on the image sensor is approximately perpendicular to the moving direction of the light-transmitting film, and the length of the transverse line of the shadow image is determined. The scanning output for the tablet is compared between one side and the other side of a reference line passing through the center of each tablet to determine the symmetry of the length of the transverse line, thereby detecting chipping of the tablet. It is configured.
以下図面を参照して本発明の実施例について説
明する。 Embodiments of the present invention will be described below with reference to the drawings.
第１図において、光透過性フイルム１には多数
列のポケツトＰが形成されていて各ポケツト内に
は錠剤Ｔが充填されている。この錠剤の欠け状態
を検出するに当り、本発明の方法においては、フ
イルム１の下側にそのフイルムの幅方向を一時に
照射し得る光源ランプ２が設置される。フイルム
１の上方には、ランプ２と組合う位置に、固体カ
メラ３を設けてある。この固体カメラは、レンズ
３１により、ランプ２により、照射されてできる
錠剤Ｔの陰影像を、走査点が線状一次元マトリツ
クス状に配列されたイメージセンサ３上に映像で
きるようになつている。イメージセンサ上に映像
された陰影像は直線（一次元）マトリツクス状に
走査されて固体カメラから電気信号として出力さ
れる。 In FIG. 1, a light-transmissive film 1 has a plurality of rows of pockets P, each of which is filled with a tablet T. In order to detect the chipped state of the tablet, in the method of the present invention, a light source lamp 2 is installed below the film 1, which can illuminate the film in the width direction at once. A solid-state camera 3 is provided above the film 1 at a position where it is combined with a lamp 2. This solid-state camera is configured so that a shadow image of the tablet T, which is formed by being irradiated by the lamp 2, can be imaged by a lens 31 on an image sensor 3 in which scanning points are arranged in a linear one-dimensional matrix. The shadow image imaged on the image sensor is scanned in a linear (one-dimensional) matrix and output as an electrical signal from the solid-state camera.
すなわち、第２図に示されるように、いまフイ
ルム１の移動により陰影像全体が矢印Ａ方向に移
動している場合、走査点がフイルムの幅方向に所
定速度で往復移動してできる走査線４は、破線で
示すように相対的にはジグザグ線になる。そして
この固体カメラは、イメージセンサ３２により、
ジグザグ状走査線の往行程（例えば走査点が図の
左から右に移動する場合）だけ検出信号を出力さ
せ、復行程では出力しないようになつている。 That is, as shown in FIG. 2, if the entire shadow image is now moving in the direction of arrow A due to the movement of the film 1, the scanning point will move back and forth at a predetermined speed in the width direction of the film, resulting in a scanning line 4. becomes a relatively zigzag line as shown by the broken line. This solid-state camera uses the image sensor 32 to
A detection signal is output only during the forward stroke of the zigzag scanning line (for example, when the scanning point moves from left to right in the figure), and is not output during the backward stroke.
ここで、フイルムの移動速度に比較して走査速
度を非常に速くすれば、第３図に示されるよう
に、走査線は錠剤の陰影像T′の移動方向とほぼ
直角になる（特に陰影像１個について考えた場
合）。そこで、その陰影像について順次に走査出
力G1〜Gnを得る。そして走査出力（横断線長さ
としての）を得る毎に各走査出力につて比較し、
例えば走査出力Gxを得たとき、陰影像の中心線
Ｃ―Ｃに達するまでの出力（長さ）L1と中心線
以後陰影像の端までの出力（長さ）L2とを一旦
固体カメラに接続された記憶装置５に記憶させた
後比較器６で相互に比較し、対称性をチエツクす
ることにより、錠剤の欠けｔを検出することがで
きる。この場合欠陥のない錠剤が全部のポケツト
に正常の位置で充填されたときに得られる走査出
力からその影像の（錠剤自体の中心でない）中心
を検知するため、横断線の中心（実際には時間）
を求め、これを基準中心Ｃ―Ｃとして記憶させ
る。 Here, if the scanning speed is made very fast compared to the moving speed of the film, the scanning line becomes almost perpendicular to the moving direction of the shaded image T' of the tablet, as shown in FIG. (if you think about one piece). Therefore, scanning outputs G 1 to Gn are sequentially obtained for the shadow images. and compare each scan output (as transverse line length) as it is obtained,
For example, when the scanning output Gx is obtained, the output (length) L 1 up to the center line C-C of the shadow image and the output (length) L 2 from the center line to the end of the shadow image are calculated by the solid-state camera. A chipping t of a tablet can be detected by storing the data in a storage device 5 connected to the tablet and comparing them with each other in a comparator 6 to check symmetry. In this case, the center of the transverse line (actually the time )
is determined and stored as the reference center CC.
更に別な方法として、走査線と平行な中心線Ｄ
―Ｄを仮想的に設定し、この中心線の前後で得ら
れた走査出力を逐一比較して対称性を判別しても
よく、またこれと前述の方法とを並用してもよ
い。 Still another method is to use a center line D parallel to the scanning line.
-D may be set virtually, and the scanning outputs obtained before and after this center line may be compared point by point to determine the symmetry, or this and the above-described method may be used in parallel.
これらの実施例の場合には、予め基準信号を記
憶させておく必要がないため、またレンズ状の偏
平な錠剤の場合にポケツトがフイルムの中央部に
あるか或は側縁付近にあるかによつて検出レンズ
３１による錠剤の角度（視角ｇ，ｈ）による視差
が生じ、イメージセンサ３２上に投影される錠剤
の影像に大、小の差が生じても、視差等による補
正は必要なくなるため、錠剤等の欠けを検出する
ための装置の制御が容易となる。 In the case of these embodiments, there is no need to store a reference signal in advance, and in the case of a lens-shaped flat tablet, whether the pocket is in the center of the film or near the side edge, Therefore, even if a parallax occurs due to the angle of the tablet (visual angle g, h) caused by the detection lens 31, and there is a large or small difference in the image of the tablet projected onto the image sensor 32, correction due to parallax etc. is not necessary. , it becomes easier to control the device for detecting chipping of tablets, etc.
以上の説明から明らかなように、本発明によれ
ば、錠剤の欠けを高い精度で容易に検出できるだ
けでなく、錠剤の有無をも検出できる。 As is clear from the above description, according to the present invention, not only chipping of a tablet can be easily detected with high accuracy, but also the presence or absence of a tablet can be detected.
第１図は本発明による欠け検出方法を実施する
ための装置の概略図、第２図は本発明による欠け
検出方法を説明する図、第３図は第２図の一部の
拡大説明図である。
１：フイルム、２：光源、３：固体カメラ、３
１：レンズ、３２：イメージセンサ、５：記憶装
置、６：比較器、Ｐ：ポケツト、Ｔ：錠剤、
T′：陰影像。
FIG. 1 is a schematic diagram of an apparatus for implementing the chipping detection method according to the present invention, FIG. 2 is a diagram explaining the chipping detection method according to the present invention, and FIG. 3 is an enlarged explanatory diagram of a part of FIG. 2. be. 1: Film, 2: Light source, 3: Solid-state camera, 3
1: Lens, 32: Image sensor, 5: Storage device, 6: Comparator, P: Pocket, T: Tablet,
T′: Shadow image.
Claims (1)
光透過性フイルムに形成されたポケツト内に充填
された錠剤の陰影像を該光透過性フイルムを挾ん
で反対側に配設されかつ走査点が線状一次元マト
リツクス状に配列されたイメージセンサ上に映像
させ、該陰影像を該イメージセンサにより電気信
号に変換して該錠剤の欠けを検出する方法におい
て、該イメージセンサ上の走査速度を該光透過性
フイルムの移動速度に比較して速くして該イメー
ジセンサ上の走査線を該光透過性フイルムの移動
方向に対してほぼ直角にし、該陰影像の横断線の
長さに対する走査出力を各錠剤の中心を通る基準
線の一方の側と他方の側とで比較して該横断線の
長さの対称性を判別し、それによつて該錠剤の欠
けを検出することを特徴とする錠剤の欠け検出方
法。1. Light is irradiated from behind the light-transmitting film, and a shadow image of the tablet filled in the pocket formed in the light-transmitting film is captured at a scanning point disposed on the opposite side with the light-transmitting film sandwiched therebetween. In this method, the scanning speed on the image sensor is controlled by detecting chipping of the tablet by making an image on an image sensor arranged in a linear one-dimensional matrix and converting the shadow image into an electric signal by the image sensor. The scanning line on the image sensor is made substantially perpendicular to the moving direction of the light-transmitting film at a speed higher than that of the light-transmitting film, and the scanning output is determined relative to the length of the transverse line of the shadow image. is compared between one side and the other side of a reference line passing through the center of each tablet to determine the symmetry of the length of the transverse line, thereby detecting chipping of the tablet. Method for detecting chipping of tablets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5228079A JPS55144531A (en) | 1979-04-27 | 1979-04-27 | Detecting method of chipped of tablet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5228079A JPS55144531A (en) | 1979-04-27 | 1979-04-27 | Detecting method of chipped of tablet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55144531A JPS55144531A (en) | 1980-11-11 |
| JPH026020B2 true JPH026020B2 (en) | 1990-02-07 |
Family
ID=12910374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5228079A Granted JPS55144531A (en) | 1979-04-27 | 1979-04-27 | Detecting method of chipped of tablet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55144531A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5811819A (en) * | 1981-07-15 | 1983-01-22 | Nomura Sangyo Kk | Color sorting method |
| JPS5923248A (en) * | 1982-07-29 | 1984-02-06 | Satake Eng Co Ltd | Crack detector of rice grain |
| JPS59135080A (en) * | 1983-01-24 | 1984-08-03 | 住友ゴム工業株式会社 | Stamp discrimination of ball |
| JPS6033036A (en) * | 1983-08-02 | 1985-02-20 | Ckd Corp | Device for detecting chipping of tablet |
| JPS61165646A (en) * | 1985-01-17 | 1986-07-26 | Shin Meiwa Ind Co Ltd | Apparatus for inspecting terminal pressure bonded part of terminal pressure bonded electric wire |
-
1979
- 1979-04-27 JP JP5228079A patent/JPS55144531A/en active Granted
Non-Patent Citations (1)
| Title |
|---|
| OMRON TECHNICS56 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55144531A (en) | 1980-11-11 |
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