JP2004239753A - X-ray foreign substance inspection apparatus - Google Patents

X-ray foreign substance inspection apparatus Download PDF

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Publication number
JP2004239753A
JP2004239753A JP2003029249A JP2003029249A JP2004239753A JP 2004239753 A JP2004239753 A JP 2004239753A JP 2003029249 A JP2003029249 A JP 2003029249A JP 2003029249 A JP2003029249 A JP 2003029249A JP 2004239753 A JP2004239753 A JP 2004239753A
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Japan
Prior art keywords
ray
foreign matter
line sensor
ray source
inspection
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JP2003029249A
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Japanese (ja)
Inventor
Shuhei Ishiguro
修平 石黒
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Shimadzu Corp
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Shimadzu Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an X-ray foreign substance inspection apparatus for easily and accurately masking an image of edges of a packaging container such as a box etc. and stably enhancing accuracy for detecting foreign substances. <P>SOLUTION: X-ray transmission images of the edges E<SB>R1</SB>, E<SB>R2</SB>have gray levels and widths equal to sides E<SB>P1</SB>, E<SB>P2</SB>in a carrying direction and a masking process is facilitated by radiating a fan beam X ray from an X-ray source 1 to a test subject W carried on a conveyer 3. The X ray is inclined and not orthogonal to the carrying direction. An X-ray transmission direction to the edges E<SB>R1</SB>, E<SB>R2</SB>of the sides orthogonal to the carrying direction among four sides of the box B is inclined. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、例えば食品や医薬品、あるいは衣服や寝具などの検査対象物中の異物の存在の有無を検査するためのX線異物検査装置に関し、更に詳しくは、検査対象物を搬送しながら、ファンビーム状のX線を照射するタイプのX線異物検査装置に関する。
【0002】
【従来の技術】
食品等に異物が混入していないか否かを非破壊のもとに検査する装置として、図6に模式的に示すように、スリット等を介在させることによってファンビーム状のX線を出力するX線源61と、そのX線源61に対向して、X線の広がり方向に素子が配列されたX線ラインセンサ62を配置するとともに、その間にコンベア63などの搬送装置を配置したものが知られている。この構成において、検査対象物Wをコンベア63で搬送しつつX線源61からのファンビーム状のX線を照射することにより、検査対象物Wの移動に従い、検査対象物WへのX線の入射位置が刻々と変化しつつX線ラインセンサ62に入射して検査対象物Wを透過したX線強度データが取得される。そして、検査対象物WがX線ラインセンサ62の配設位置を通過し終えた時点で、検査対象物Wの2次元X線透過データが得られ、その2次元データを用いた画像処理により、検査対象物W中の異物の有無が判定される。
【0003】
ここで、検査対象物Wが例えば図7に示すように箱Bなどの包装容器内に食品等の内容物Iが収容されている場合、そのX線透過像は内容物Iの像を箱Bの4辺の縁の像(影)で囲んだ画像となる。このような箱Bの縁の像や、あるいは検査対象物中に正常部材としてX線を透過させにくい部材等が含まれている場合には、これらの像を異物として判定してしまうことを防止することを目的として、通常、検査対象物のX線透視像のうち、容器の縁やX線を透過させにくい部材の像をマスキング処理等によって検査対象から除外したうえで、異物の有無の判定が行われる(例えば特許文献1および特許文献2参照)。
【0004】
【特許文献1】
特開2001−281173号公報(第2−第3頁)
【特許文献2】
特開平9−145343号公報(第5頁)
【0005】
【発明が解決しようとする課題】
ところで、以上のような箱Bに収容された検査対象物Wにおいては、図8に図6のA矢視図を示すように、箱Bの4辺の縁のうち、搬送方向に沿った2辺の縁EP1,EP2の壁部には、ファンビーム状のX線が斜めに透過するのに対し、搬送方向に直交する2辺の縁ER1,ER2の壁部には、X線はこれらの壁部に略平行に透過することるなる。そのためX線透視画像は図9に模式的に示すように、箱Bの縁の像は一様とはならず、搬送方向に沿った辺の縁EP1,EP2の像については、他の2辺の縁ER1,ER2に比して、濃淡が淡く、かつ、幅が広くなる。
【0006】
そのため、箱Bの縁の全てをマスキングするに当たって、画素の濃淡情報から箱の縁の認識してマスキング範囲を正しく設定することが困難となり、結果として異物の検出感度が低下してしまう場合があるという問題があった。
【0007】
本発明はこのような実情に鑑みてなされたもので、箱などの包装容器の縁の像を容易かつ正確にマスキングすることができ、もって異物の検出感度を安定して高くすることのできるX線異物検査装置の提供を目的としている。
【0008】
【課題を解決するための手段】
上記の目的を達成するため、請求項1に係る発明のX線異物検査装置は、ファンビーム状のX線を出力するX線源と、そのX線源に対向配置され、X線の広がり方向に沿って素子が配列されたX線ラインセンサと、そのX線源とX線ラインセンサの間に設けられ、上記X線ラインセンサの素子の配列方向に直交する方向に検査対象物を搬送する搬送手段と、上記X線ラインセンサの出力に基づく検査対象物のX線透視画像を解析して当該検査対象物中の異物の有無を判定する画像解析手段を備えたX線異物検査装置において、上記搬送手段の搬送方向が水平方向であり、上記X線源からのX線照射方向が鉛直方向に対して搬送方向に沿う向きに傾斜していることによって特徴づけられる。
【0009】
また、同じ目的を達成するため、請求項2に係る発明では、X線源からのX線照射方向を鉛直方向とし、搬送手段の搬送方向を水平方向に対して所定角度傾斜させることを特徴としている。
【0010】
更に、同じ目的を達成するため、請求項3に係る発明においては、X線源からのX線照射方向を鉛直方向とし、搬送手段の搬送方向が水平方向とするとともに、その搬送手段の検査対象物の搭載面に、検査対象物を水平方向に対して搬送方向に傾斜させるための傾斜付与手段を設けていることを特徴としている。
【0011】
本発明は、箱の縁のX線透過像を、検査対象物へのX線の入射方向を考慮することにより一様なものとして、所期の目的を達成しようとするものである。
【0012】
すなわち、箱の各辺の縁のX線透過像のうち、搬送方向に沿った2辺の像が、これらに直交する2辺の像に比して、濃淡が淡く、かつ、幅が広くなる原因は、前記したようにX線の透過方向の相違によるためであり、本発明においては、X線の照射方向と、検査対象物の4辺の縁のうち搬送方向に直交する2辺の壁部とを沿わさずに傾斜させて搬送することにより、これらの辺に対するX線透過方向を、搬送方向に沿った2辺と同様に斜めにして、全ての辺に対するX線の透過方向を略等しくする。これにより、箱の各辺の縁のX線透過像が略一様となり、画素の濃淡情報からマスキング範囲を決定することが容易となる。
【0013】
以上のように検査対象物の4辺の縁のうち搬送方向に直交する2辺の縁の壁部に対してX線の透過方向を斜めにする具体的構成として、請求項1に係る発明のように、搬送手段による搬送方向を水平方向として、X線源からのファンビーム状のX線を鉛直方向に対して傾斜させる構成、請求項2に係る発明のように、X線源からのファンビーム状のX線を従来と同様に鉛直方向とし、搬送手段による搬送方向を水平方向に対して傾斜させる構成、あるいは請求項3に係る構成のように、ファンビーム状のX線の照射方向を鉛直方向、搬送手段による搬送方向を水平方向とするものの、その搬送手段による検査対象物の搭載面に、検査対象物を水平方向に対して傾斜させるための傾斜付与手段を設ける構成のいずれをも採用することができ、これらのいずれの構成を採用しても比較的簡単な構成により目的を達成することができる。
【0014】
【発明の実施の形態】
以下、図面を参照しつつ本発明の実施の形態について説明する。
図1は本発明の実施の形態の全体構成図であり、機械的構成を表す模式的斜視図と電気的構成を表すブロック図とを併記して示す図で、図2はその機械的構成部分のA矢視図である。
【0015】
この例はX線源1からのX線の照射方向を傾斜させた例を示すものであり、X線源1は、ファンビーム状に広がりを持つX線を、鉛直方向vに対して後述するコンベア3の搬送方向にθだけ傾斜した方向に出力する。X線ラインセンサ2は、X線源1からのファンビーム状のX線が入射するように、X線の照射方向の傾斜角度θに合わせて、X線源1の鉛直下方から所定距離だけずれた位置に配置されている。そして、これらの間に、検査対象物Wを搬送するためのコンベア3が設けられている。コンベア3は、従来と同様に、その搬送面を水平方向に沿わせた姿勢とされ、検査対象物Wを水平方向に一定の速度で搬送する。
【0016】
X線ラインセンサ2の出力は、コンピュータを主体とする制御部10に取り込まれる。この制御部10は、その取り込んだ画素情報を用いて、後述するマスキング処理を含む画像処理を施すことにより、検査対象物W内に異物が混入しているか否かを判別する。また、この制御部10は、TVモニタ11に検査対象物Wの画像処理後のX線透過像を表示するとともに、操作部12から入力される各種指令を受けてコンベア3やX線源1に駆動制御信号を供給する。
【0017】
以上の構成において、検査対象物Wが図示のように箱B内に内容物Iが収容された形態である場合、その4辺の縁のうち、搬送方向に沿った2辺の縁EP1およびEP2の壁部には従来と同様にX線が斜めに透過し、これらに直交する他の2辺ER1およびER2についても、X線はその傾斜角度θに応じた角度だけ斜めに透過することになる。従って、X線の傾斜角度θを適宜に選択することによって、X線ラインセンサ2の出力に基づく検査対象物WのX線透過像は、図3に模式的に示すように、内容物Iの像を箱Bの縁の像で囲み、その縁の像の4辺EP1,EP2およびER1,ER2は、濃淡および幅が互いに同一で一様なものとなる。
【0018】
制御部10では、このようなX線透視像から、箱Bの縁の像をマスキングし、その内側を検査対象領域とするが、そのマスキング範囲の設定が従来に比して極めて容易となる。すなわち、マスキング処理においては、例えばまず、適当なしきい値を用いて各画素を2値化することよより、全体画像から検査対象物Wの像を背景の像に対して分離抽出し、分離抽出後の像の周囲から別のしきい値を用いて箱Bの縁の像を決定してその部分をマスキングするが、箱Bの縁の像がその濃淡並びに幅が略一様であるため、マスキングすべき範囲を安定して正確に、かつ極めて容易に決定することができ、ひいては異物の有無の判定を正確かつ安定したものとすることができる。
【0019】
以上の例はX線源1からのX線を傾斜させた例を示したが、コンベア3による検査対象物Wの搬送方向を傾斜させても、あるいは、コンベア3の検査対象物Wの搭載面に、当該検査対象物Wに傾斜を付与する手段を設けても、上記と同等の効果を奏することができる。
【0020】
図4はコンベア3による検査対象物Wの搬送方向を傾斜させる例の説明図である。この例では、X線源1はファンビーム状のX線を鉛直下方に向けて照射するとともに、それに対向してX線ラインセンサ2を配置している点は従来と同様であるが、これらの間に設けられるコンベア3を水平方向hに対してφだけ傾斜させている。これにより、検査対象物Wの4辺の縁のうちの搬送方向に直交する辺ER1およびER2の壁部に対してX線が先の例と同様に斜めとなり、搬送方向に沿った辺EP1,EP2と同等の濃淡および幅のX線透過像が得られる。
【0021】
図5はコンベア3の上面に検査対象物Wに傾斜を与える手段を設ける例の説明図である。この例では、X線源1は上記と同様にX線を鉛直下方に向けて照射するとともに、コンベア3の搬送方向を水平方向とし、そのコンベア3上面に、検査対象物Wを傾斜させるための楔形状の部材4を配置している。この構成によっても、検査対象物Wの搬送方向に直交する辺ER1およびER2に対するX線の透過方向を斜めとすることができ、上記した各例と同等の作用効果を奏することができる。この楔形状の部材4はX線透過率が高く部材3自身の影が少ない材質と形状であることが望ましい。
【0022】
【発明の効果】
以上のように、本発明によれば、箱内に内容物を収容した検査対象物の検査に当たり、箱の4辺の縁の壁部へのX線透過方向を略同一として、その縁のX線透視像を略一様にすることができるので、その縁のマスキング処理を容易に安定して正確に行うことが可能となり、ひいては異物の検出感度を安定して向上させることができる。
【図面の簡単な説明】
【図1】本発明の実施の形態の全体構成図で、機械的構成を表す模式的斜視図と電気的構成を表すブロック図とを併記して示す図である。
【図2】図1のA矢視図である。
【図3】本発明の実施の形態により得られる検査対象物WのX線透視像の例を示す模式図である。
【図4】本発明の他の実施の形態の構成の説明図である。
【図5】本発明の更に他の実施の形態の構成の説明図である。
【図6】従来のX線異物検査装置の構成例を示す模式図である。
【図7】箱に収容されている検査対象物の説明図である。
【図8】図6のC矢視図で示す、図7の検査対象物Wに対するX線の透過方向の説明図である。
【図9】図6の装置により図7の検査対象物を撮像した際に得られるX線透視像の例の説明図である。
【符号の説明】
1 X線源
2 X線ラインセンサ
3 コンベア
4 楔形状の部材
10 制御部
11 TVモニタ
12 操作部
W 検査対象物
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an X-ray foreign substance inspection apparatus for inspecting the presence or absence of a foreign substance in an inspection object such as food or medicine, or clothes or bedding, and more particularly, to a fan while transporting the inspection object. The present invention relates to an X-ray foreign matter inspection device that irradiates a beam of X-rays.
[0002]
[Prior art]
As a device for non-destructively inspecting whether foreign matter is mixed in foods or the like, a fan beam-shaped X-ray is output by interposing a slit or the like as schematically shown in FIG. An X-ray source 61 and an X-ray line sensor 62 in which elements are arranged in the direction of spread of X-rays are arranged opposite to the X-ray source 61, and a transport device such as a conveyor 63 is arranged therebetween. Are known. In this configuration, by irradiating the inspection object W with a fan beam-shaped X-ray from the X-ray source 61 while transporting the inspection object W on the conveyor 63, the X-ray is transmitted to the inspection object W according to the movement of the inspection object W. X-ray intensity data that is incident on the X-ray line sensor 62 and transmitted through the inspection object W while the incident position is changing every moment is acquired. Then, at the time when the inspection object W has passed the position where the X-ray line sensor 62 is disposed, two-dimensional X-ray transmission data of the inspection object W is obtained, and image processing using the two-dimensional data is performed. The presence or absence of foreign matter in the inspection object W is determined.
[0003]
Here, when the inspection object W contains a content I such as food in a packaging container such as a box B as shown in FIG. 7, for example, the X-ray transmission image is obtained by replacing the image of the content I with the box B Is an image surrounded by the image (shadow) of the four sides. In the case where such an image of the edge of the box B or an inspection object includes a member that is unlikely to transmit X-rays as a normal member, it is prevented that these images are determined as foreign matter. Usually, for the purpose of excluding, from the X-ray fluoroscopic image of the inspection object, the image of the edge of the container or the member hardly transmitting X-rays from the inspection object by masking processing or the like, and then determining the presence or absence of foreign matter (For example, see Patent Literature 1 and Patent Literature 2).
[0004]
[Patent Document 1]
JP 2001-281173 A (pages 2 to 3)
[Patent Document 2]
JP-A-9-145343 (page 5)
[0005]
[Problems to be solved by the invention]
By the way, in the inspection object W accommodated in the box B as described above, as shown in FIG. the wall portion of the side edge E P1, E P2 is a fan beam-like X-ray contrast passes obliquely, the wall of the conveying direction edges of two sides perpendicular to the E R1, E R2 is X The lines will be transmitted substantially parallel to these walls. Therefore X-ray fluoroscopic image as shown schematically in Figure 9, the image of the edge of the box B does not become uniform, the image side of the edge E P1, E P2 along the conveying direction, the other The shading is lighter and wider than the two edges E R1 and E R2 .
[0006]
Therefore, in masking the entire edge of the box B, it is difficult to correctly set the masking range by recognizing the edge of the box from the grayscale information of the pixels, and as a result, the detection sensitivity of the foreign matter may be reduced. There was a problem.
[0007]
The present invention has been made in view of the above circumstances, and it is possible to easily and accurately mask an image of an edge of a packaging container such as a box, and thereby to stably increase the detection sensitivity of foreign substances. It is intended to provide a line foreign matter inspection device.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, an X-ray foreign matter inspection apparatus according to the first aspect of the present invention includes an X-ray source that outputs fan-beam-shaped X-rays, and is disposed to face the X-ray source, and the X-ray spread direction. An X-ray line sensor having elements arranged along the line, and provided between the X-ray source and the X-ray line sensor to convey the inspection object in a direction orthogonal to the arrangement direction of the elements of the X-ray line sensor. A conveying means, and an X-ray foreign matter inspection apparatus including image analysis means for analyzing an X-ray fluoroscopic image of the inspection object based on an output of the X-ray line sensor to determine the presence or absence of foreign matter in the inspection object, The transfer unit is characterized in that a transfer direction of the transfer unit is a horizontal direction, and an X-ray irradiation direction from the X-ray source is inclined in a direction along the transfer direction with respect to a vertical direction.
[0009]
In order to achieve the same object, the invention according to claim 2 is characterized in that the X-ray irradiation direction from the X-ray source is vertical, and the transport direction of the transport means is inclined at a predetermined angle with respect to the horizontal direction. I have.
[0010]
Further, in order to achieve the same object, in the invention according to claim 3, the direction of X-ray irradiation from the X-ray source is vertical, the direction of transport of the transport unit is horizontal, and the inspection target of the transport unit is The present invention is characterized in that a tilting means for tilting the inspection object in the transport direction with respect to the horizontal direction is provided on the mounting surface of the object.
[0011]
An object of the present invention is to achieve an intended purpose by making an X-ray transmission image of an edge of a box uniform by considering an incident direction of X-rays to an inspection object.
[0012]
That is, of the X-ray transmission images of the edges of each side of the box, the two images along the transport direction are lighter and lighter in width and wider than the images on the two sides orthogonal to the transport direction. The cause is as described above because of the difference in the X-ray transmission direction. In the present invention, the X-ray irradiation direction and the two edges of the four edges of the inspection object that are orthogonal to the transport direction are used. The X-ray transmission direction for these sides is oblique as in the case of the two sides along the conveyance direction, and the X-ray transmission directions for all the sides are substantially oblique. Make them equal. Thereby, the X-ray transmission image of the edge of each side of the box becomes substantially uniform, and it becomes easy to determine the masking range from the density information of the pixels.
[0013]
As described above, according to the first aspect of the present invention, as a specific configuration, the transmission direction of the X-ray is oblique to the walls of the two edges orthogonal to the transport direction among the four edges of the inspection object. A configuration in which the direction of conveyance by the conveying means is set to the horizontal direction and the fan beam-shaped X-rays from the X-ray source are inclined with respect to the vertical direction. The beam-shaped X-rays are set to the vertical direction as in the related art, and the conveying direction of the conveying means is inclined with respect to the horizontal direction. Both the vertical direction and the transport direction by the transport unit are set to be horizontal, but any of the configurations in which an inclination applying unit for inclining the inspection target with respect to the horizontal direction is provided on the mounting surface of the inspection target by the transport unit. Can be adopted Can achieve the object by a relatively simple structure be adopted any constitution of al.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an overall configuration diagram of an embodiment of the present invention, in which a schematic perspective view showing a mechanical configuration and a block diagram showing an electrical configuration are shown together, and FIG. FIG.
[0015]
This example shows an example in which the irradiation direction of the X-rays from the X-ray source 1 is inclined. The X-ray source 1 converts the X-rays having a fan beam spread in the vertical direction v as described later. Output in a direction inclined by θ with respect to the transport direction of the conveyor 3. The X-ray line sensor 2 is displaced by a predetermined distance from vertically below the X-ray source 1 in accordance with the inclination angle θ of the X-ray irradiation direction so that X-rays in the form of a fan beam from the X-ray source 1 are incident. Is located at A conveyor 3 for transporting the inspection object W is provided between them. As in the conventional case, the conveyer 3 has a posture in which the conveying surface is arranged in the horizontal direction, and conveys the inspection object W at a constant speed in the horizontal direction.
[0016]
The output of the X-ray line sensor 2 is taken into a control unit 10 mainly composed of a computer. The control unit 10 performs image processing including masking processing to be described later using the captured pixel information to determine whether a foreign substance has entered the inspection target object W. The control unit 10 displays the processed X-ray transmission image of the inspection object W on the TV monitor 11, and receives various commands input from the operation unit 12 to control the conveyor 3 and the X-ray source 1. Supply a drive control signal.
[0017]
In the above configuration, when the inspection object W is in a form in which the contents I are accommodated in the box B as shown in the figure, of the four edges, two edges EP1 along the transport direction and two edges EP1 and X-rays pass obliquely through the wall of the EP2 as in the prior art, and the X-rays pass obliquely through the other two sides E R1 and E R2 at an angle corresponding to the inclination angle θ. Will do. Therefore, by appropriately selecting the X-ray inclination angle θ, the X-ray transmission image of the inspection target W based on the output of the X-ray line sensor 2 can be obtained as shown schematically in FIG. The image is surrounded by the image of the edge of the box B, and the four sides EP 1 , EP 2 and E R1 , E R2 of the image of the edge are uniform in density and width and uniform.
[0018]
The control unit 10 masks the image of the edge of the box B from such an X-ray fluoroscopic image, and sets the inside of the image as the inspection target area. The setting of the masking range is much easier than in the past. That is, in the masking process, for example, first, each pixel is binarized using an appropriate threshold value, so that the image of the inspection object W is separated and extracted from the whole image with respect to the background image, and separated and extracted. An image of the edge of the box B is determined using another threshold value from the surroundings of the subsequent image and the portion is masked, but since the image of the edge of the box B is almost uniform in density and width, The range to be masked can be determined stably, accurately, and extremely easily, and the determination of the presence or absence of a foreign substance can be made accurate and stable.
[0019]
Although the above example shows an example in which the X-ray from the X-ray source 1 is inclined, the conveying direction of the inspection object W by the conveyor 3 may be inclined, or the mounting surface of the inspection object W on the conveyor 3 may be used. Even if means for imparting an inclination to the inspection object W is provided, the same effect as described above can be obtained.
[0020]
FIG. 4 is an explanatory diagram of an example in which the conveying direction of the inspection object W by the conveyor 3 is inclined. In this example, the X-ray source 1 emits fan beam-shaped X-rays vertically downward, and an X-ray line sensor 2 is disposed opposite to the X-ray source. The conveyor 3 provided therebetween is inclined by φ with respect to the horizontal direction h. As a result, the X-ray becomes oblique to the walls of the sides E R1 and E R2 orthogonal to the transport direction among the four sides of the inspection object W in the same manner as in the previous example, and the side along the transport direction. X-ray transmission image of the E P1, E P2 comparable shades and width is obtained.
[0021]
FIG. 5 is an explanatory view of an example in which a means for giving an inclination to the inspection object W is provided on the upper surface of the conveyor 3. In this example, the X-ray source 1 irradiates the X-rays vertically downward as described above, sets the transport direction of the conveyor 3 to the horizontal direction, and tilts the inspection object W on the upper surface of the conveyor 3. A wedge-shaped member 4 is arranged. This is also the configuration, it is possible to obtain the conveying direction the transmission direction of the X-ray with respect to the side E R1 and E R2 perpendicular can be oblique, the operational effects equivalent to the example described above of the inspection object W. The wedge-shaped member 4 is desirably made of a material and a shape having a high X-ray transmittance and a small shadow of the member 3 itself.
[0022]
【The invention's effect】
As described above, according to the present invention, when inspecting an inspection object in which contents are accommodated in a box, the X-ray transmission directions to the walls of the four sides of the box are set to be substantially the same, and the X Since the fluoroscopic image can be made substantially uniform, it becomes possible to easily and stably and accurately perform the masking processing of the edge, and it is possible to stably improve the detection sensitivity of the foreign matter.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of an embodiment of the present invention, showing a schematic perspective view illustrating a mechanical configuration and a block diagram illustrating an electrical configuration.
FIG. 2 is a view taken in the direction of arrow A in FIG. 1;
FIG. 3 is a schematic diagram showing an example of an X-ray fluoroscopic image of the inspection object W obtained according to the embodiment of the present invention.
FIG. 4 is an explanatory diagram of a configuration of another embodiment of the present invention.
FIG. 5 is an explanatory diagram of a configuration of still another embodiment of the present invention.
FIG. 6 is a schematic diagram showing a configuration example of a conventional X-ray foreign matter inspection apparatus.
FIG. 7 is an explanatory diagram of an inspection object stored in a box.
8 is an explanatory view of the X-ray transmission direction with respect to the inspection object W of FIG. 7 as viewed in the direction of arrow C in FIG. 6;
9 is an explanatory diagram of an example of an X-ray fluoroscopic image obtained when the inspection object of FIG. 7 is imaged by the apparatus of FIG. 6;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 X-ray source 2 X-ray line sensor 3 Conveyor 4 Wedge-shaped member 10 Control part 11 TV monitor 12 Operation part W Inspection object

Claims (3)

ファンビーム状のX線を出力するX線源と、そのX線源に対向配置され、X線の広がり方向に沿って素子が配列されたX線ラインセンサと、そのX線源とX線ラインセンサの間に設けられ、上記X線ラインセンサの素子の配列方向に直交する方向に検査対象物を搬送する搬送手段と、上記X線ラインセンサの出力に基づく検査対象物のX線透視画像を解析して当該検査対象物中の異物の有無を判定する画像解析手段を備えたX線異物検査装置において、
上記搬送手段の搬送方向が水平方向であり、上記X線源からのX線照射方向が鉛直方向に対して搬送方向に沿う向きに傾斜していることを特徴とするX線異物検査装置。
An X-ray source that outputs fan-beam-shaped X-rays, an X-ray line sensor that is arranged to face the X-ray source, and in which elements are arranged along the X-ray spread direction, the X-ray source and the X-ray line A transport unit provided between the sensors for transporting the inspection target in a direction orthogonal to the arrangement direction of the elements of the X-ray line sensor; and an X-ray fluoroscopic image of the inspection target based on the output of the X-ray line sensor. In an X-ray foreign matter inspection apparatus provided with an image analyzing means for analyzing and determining the presence or absence of a foreign matter in the inspection object,
An X-ray foreign matter inspection apparatus, wherein a transport direction of the transport unit is a horizontal direction, and an X-ray irradiation direction from the X-ray source is inclined in a direction along a transport direction with respect to a vertical direction.
ファンビーム状のX線を出力するX線源と、そのX線源に対向配置され、X線の広がり方向に沿って素子が配列されたX線ラインセンサと、そのX線源とX線ラインセンサの間に設けられ、上記X線ラインセンサの素子の配列方向に直交する方向に検査対象物を搬送する搬送手段と、上記X線ラインセンサの出力に基づく検査対象物のX線透視画像を解析して当該検査対象物中の異物の有無を判定する画像解析手段を備えたX線異物検査装置において、
上記X線源からのX線照射方向が鉛直方向であり、上記搬送手段の搬送方向が水平方向に対して所定角度傾斜していることを特徴とするX線異物検査装置。
An X-ray source that outputs fan-beam-shaped X-rays, an X-ray line sensor that is arranged to face the X-ray source, and in which elements are arranged along the X-ray spread direction, the X-ray source and the X-ray line A transport unit provided between the sensors for transporting the inspection target in a direction orthogonal to the arrangement direction of the elements of the X-ray line sensor; and an X-ray fluoroscopic image of the inspection target based on the output of the X-ray line sensor. In an X-ray foreign matter inspection apparatus provided with an image analyzing means for analyzing and determining the presence or absence of a foreign matter in the inspection object,
An X-ray foreign matter inspection apparatus, wherein an X-ray irradiation direction from the X-ray source is a vertical direction, and a transfer direction of the transfer means is inclined at a predetermined angle with respect to a horizontal direction.
ファンビーム状のX線を出力するX線源と、そのX線源に対向配置され、X線の広がり方向に沿って素子が配列されたX線ラインセンサと、そのX線源とX線ラインセンサの間に設けられ、上記X線ラインセンサの素子の配列方向に直交する方向に検査対象物を搬送する搬送手段と、上記X線ラインセンサの出力に基づく検査対象物のX線透視画像を解析して当該検査対象物中の異物の有無を判定する画像解析手段を備えたX線異物検査装置において、
上記X線源からのX線照射方向が鉛直方向で、上記搬送手段の搬送方向が水平方向であって、その搬送手段の検査対象物の搭載面に、検査対象物を水平方向に対して搬送方向に傾斜させるための傾斜付与手段が設けられていることを特徴とするX線異物検査装置。
An X-ray source that outputs fan-beam-shaped X-rays, an X-ray line sensor that is arranged to face the X-ray source, and in which elements are arranged along the X-ray spread direction, the X-ray source and the X-ray line A transport unit provided between the sensors for transporting the inspection target in a direction orthogonal to the arrangement direction of the elements of the X-ray line sensor; and an X-ray fluoroscopic image of the inspection target based on the output of the X-ray line sensor. In an X-ray foreign matter inspection apparatus provided with an image analyzing means for analyzing and determining the presence or absence of a foreign matter in the inspection object,
The direction of X-ray irradiation from the X-ray source is vertical, and the direction of transport of the transporting means is horizontal, and the inspection object is transported in the horizontal direction on the mounting surface of the inspection means of the transporting means. An X-ray foreign matter inspection apparatus, comprising: a tilt imparting means for tilting in a direction.
JP2003029249A 2003-02-06 2003-02-06 X-ray foreign substance inspection apparatus Withdrawn JP2004239753A (en)

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