JPS62272108A - Detecting device for lead curvature of electronic component - Google Patents

Detecting device for lead curvature of electronic component

Info

Publication number
JPS62272108A
JPS62272108A JP61115189A JP11518986A JPS62272108A JP S62272108 A JPS62272108 A JP S62272108A JP 61115189 A JP61115189 A JP 61115189A JP 11518986 A JP11518986 A JP 11518986A JP S62272108 A JPS62272108 A JP S62272108A
Authority
JP
Japan
Prior art keywords
component
lead
image
dictionary
electronic component
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.)
Granted
Application number
JP61115189A
Other languages
Japanese (ja)
Other versions
JPH0743253B2 (en
Inventor
Osamu Harada
治 原田
Akio Kojima
小島 明夫
Sohei Ikeda
宗平 池田
Yoshihisa Watanabe
渡辺 芳久
Yoshitoshi Tsuji
辻 喜寿
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP61115189A priority Critical patent/JPH0743253B2/en
Priority to US07/048,725 priority patent/US4803871A/en
Priority to KR1019870004630A priority patent/KR920004752B1/en
Publication of JPS62272108A publication Critical patent/JPS62272108A/en
Publication of JPH0743253B2 publication Critical patent/JPH0743253B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Image Processing (AREA)
  • Image Analysis (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

PURPOSE:To inspect lead curvature as to many kinds of components by comparing the lead image of an electronic component with a standard lead image. CONSTITUTION:A component 1 to be inspected exits from a payoff stick 6 ad is then gripped by a component gripping device 2, lifted by a cylinder 3, and pressed against a plate 4 with constant pressure. The reverse surface of the plate 4 is covered with a translucent film 17 and irradiated by projectors 5 and 6 to form the silhouette image of a component lead 18 on the film 17. This silhouette image is picked up by a camera 7 and converted by a binary circuit 8 into a binary image, which is sent to a matching circuit 9. The circuit 9 fetches a dictionary (comparison pattern) 10 of each component shape and matches the dictionary 10 with the binary image by a specific comparing method. Consequently, it is decided 11 whether the component is normal or not and a lane switching part 12 is operated by a lane 13 to discharge the component to a conforming or nonconforming article discharge stick 14 or 15. The image signal as the dictionary 10 is optionally settable, so even when the shape of the component 11 changes, that is easily dealt with.

Description

【発明の詳細な説明】 3、発明の詳細な説明 〔産業上の利用分野〕 本発明は電子部品のリード曲り検出装置に係り。[Detailed description of the invention] 3. Detailed description of the invention [Industrial application field] The present invention relates to a lead bend detection device for electronic components.

特にプリント基板に搭載する面付はタイプ電子部品のリ
ード曲りの検出に好適な電子部品のリード曲り検出装置
に関する。
In particular, the present invention relates to an electronic component lead bend detection device suitable for detecting lead bends in surface mounting type electronic components mounted on a printed circuit board.

〔従来の技術〕[Conventional technology]

リード曲り検査対象の電子部品には、例えばプリント回
路板に搭載されるPLCC(プラスチックリーデツド 
チップキャリア)がある。PLCCは、そのリードがJ
形をしており、部品実装密度を高くすることが可能であ
るが、はんだ付後にそのはんだ接続部が部品本体の下に
隠れるため、目視によるはんだ付チェックができないと
いう欠点を持っている。そのため部品単体でのリード浮
き、リードズレと言った不良を検出し、不良部品の排除
が必要となってくる。
Examples of electronic components to be inspected for lead bending include PLCCs (plastic leaded circuit boards) mounted on printed circuit boards.
chip carrier). PLCC, its lead is J.
Although it is possible to increase the density of component mounting, it has the disadvantage that the solder joints are hidden under the component body after soldering, making it impossible to visually check the soldering. Therefore, it is necessary to detect defects such as lead floating and lead displacement in individual parts and eliminate defective parts.

第5図に従来の部品のリード曲り検出装置の構成例を示
す。第5図において、被検査部品1が把持部2の図示さ
れない機構により把持され、シリンダ3により定盤26
の下方に移動させられ、定盤26の下方には、前記部品
のリードに対応してグラスファイバーに接続された受光
器27.前記リードをはさんで対応した場所にグラスフ
ァイバーにより導かれた投光器28がそれぞれ配置され
ている。したがって、各リードに対応した受光器27へ
の入力光量は、リードの曲り、浮き量により変化する。
FIG. 5 shows an example of the configuration of a conventional component lead bend detection device. In FIG. 5, the part to be inspected 1 is held by a mechanism (not shown) of the gripping part 2, and a surface plate 26 is held by the cylinder 3.
, and below the surface plate 26 is a light receiver 27. connected to a glass fiber corresponding to the lead of the component. Light projectors 28 guided by glass fibers are placed at corresponding locations across the leads. Therefore, the amount of light input to the light receiver 27 corresponding to each lead changes depending on the bending and floating amount of the lead.

この光量はA/D変換器29でAD変換された後、予め
準備した良品サンプル(試験サンプルと同一条件でセッ
トされている)より得られた光量と判定部30において
比較、判定され、リードの曲り量が検出される。しかし
、この検出装置は、多種類の電子部品の臨機応変に対応
して検査することを配慮したものではなかった。
After this light amount is AD converted by the A/D converter 29, it is compared and determined in the determination section 30 with the light amount obtained from a good sample prepared in advance (set under the same conditions as the test sample). The amount of bending is detected. However, this detection device was not designed to allow for flexible testing of a wide variety of electronic components.

なお、この種の装置として関連するものに例えば、マシ
ンインテリジェンス社のMI−8500A  PLCC
検査システムカタログがある。
Incidentally, an example of a related device of this type is Machine Intelligence's MI-8500A PLCC.
There is an inspection system catalog.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上記従来技術は、部品形状が変る毎に検査系の全て及び
良品サンプルを取替える必要があり、多品種の電子部品
の検査という点には問題があった。
The above-mentioned conventional technology requires replacing the entire inspection system and non-defective samples every time the shape of the component changes, which poses a problem in terms of inspecting a wide variety of electronic components.

本発明の目的は、多種類の部品に対応できる電子部品の
リード曲り検査装置を提供することにある。
SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic component lead bending inspection device that can handle a wide variety of components.

〔問題点を解決するための手段〕 上記目的は、電子部品を押付けて該電子部品のリード画
像を写出する光学プレートと、予め部品形状毎の標準リ
ード画像を記憶した記憶手段と、前記電子部品のリード
画像と標準リード画像を比較してリード曲りを判定する
比較判定手段とを設けることにより達成される。
[Means for Solving the Problems] The above object is to provide an optical plate that presses an electronic component and projects a lead image of the electronic component, a storage means that stores a standard lead image for each component shape in advance, and an electronic This is achieved by providing a comparison and determination means that compares the lead image of the component with the standard lead image to determine lead bending.

〔作 用〕[For production]

電子部品を半透明の光学プレートに押付けることにより
、該電子部品の各リードのシルエット画像が写し出され
る。このシルエット画像を例えば2値化画像信号に変換
する。一方、部品形状毎の良品の標準リード画像を同様
に2値個画像信号として予め記憶手段に記憶しておく。
By pressing the electronic component against the translucent optical plate, a silhouette image of each lead of the electronic component is projected. This silhouette image is converted into, for example, a binary image signal. On the other hand, standard lead images of non-defective products for each part shape are similarly stored in advance in the storage means as binary image signals.

この記憶手段から該当2値化画像信号を読み出し、これ
と電子部品の2値化画像信号とを比較することにより、
該電子部品のリード浮きリードズレを検出することがで
きる。
By reading out the corresponding binarized image signal from this storage means and comparing it with the binarized image signal of the electronic component,
Lead floating and lead displacement of the electronic component can be detected.

〔実施例〕〔Example〕

以下、本発明の一実施例を第1図〜第4図により説明す
る。
An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

第1図において、被検査部品である例えばPLCCIは
、部品払出しスティック16より出た後、図示されない
機構による部品把持装置2により把持される。該把持装
置2は、シリンダ3により持ち上げられ、ガラスのよう
なプレート4に一定圧力で押り付けられる。
In FIG. 1, a component to be inspected, for example, a PLCCI, comes out of a component dispensing stick 16 and is then gripped by a component gripping device 2 having a mechanism (not shown). The gripping device 2 is lifted by a cylinder 3 and pressed with constant pressure against a plate 4, such as glass.

なお、シリンダ3はパルスモータまたはサーボモータに
置き換えることが可能である。
Note that the cylinder 3 can be replaced with a pulse motor or a servo motor.

前記プレート4の下面(部品リードとの接触面)は、半
透明膜17により被われている。5,6は横方向から光
を放ち、半透明膜17上に部品リードのシルエツト像を
作るための投光器である。該投光器は部品リードの四方
より平均的に各リードに光を照射する。
The lower surface of the plate 4 (the surface in contact with the component leads) is covered with a semi-transparent film 17. 5 and 6 are projectors that emit light from the side to create a silhouette image of the component lead on the semi-transparent film 17. The light projector irradiates each lead with light evenly from all sides of the component lead.

第2図に、プレート4と部品1の関係を示す。FIG. 2 shows the relationship between the plate 4 and the component 1.

ニーに示した部品1のリード18は内側に押し付けられ
ており、はんだ術後り一下の浮き不良を生しめるもので
ある。
The leads 18 of the component 1 shown at the knee are pressed inward, which causes some looseness after soldering.

第3図は、プレート4の半透明膜17上に現われたリー
ドのシルエット像である。該シルエツト像19は、カメ
ラ7により画像として取り込まれ、しかる後2値化回路
8により2値化画像とされ。
FIG. 3 is a silhouette image of the lead appearing on the semi-transparent film 17 of the plate 4. FIG. The silhouette image 19 is captured as an image by the camera 7, and then converted into a binarized image by the binarization circuit 8.

マツチング回路9に送られる。該マツチング回路9では
予め部品形状毎に有する辞書(比較パターン)10を取
り込み、該辞書と前記2値化画像とを後述する比較方法
により照合する。その結果部品の良否判定を行い、レー
ン切換部12によりレーン13を動作させ、良品排出ス
ティック14または不良品排出スティック15に部品を
排出する。
The signal is sent to the matching circuit 9. The matching circuit 9 takes in in advance a dictionary (comparison pattern) 10 for each part shape, and compares the dictionary with the binarized image by a comparison method to be described later. As a result, the quality of the parts is determined, and the lane switching unit 12 operates the lane 13 to discharge the parts to the good product discharge stick 14 or the defective product discharge stick 15.

こうして得られた良品のみを使用することにより、信頼
性の高いはんだ相接続が可能となる。
By using only non-defective products thus obtained, highly reliable solder phase connections can be made.

第4図により、2値化された部品リードのシルエツト像
と辞書とのマツチングを行う方式について述べる62値
化された部品リードのシルエット画像20のうち、19
は正常なリード、21はリード曲りを生じた部品リード
のシルエット画像である。該シルエット画像に対応する
辞書10のうち、点線22は正常なリードが位置すべき
領域である。そこで領域22よりも小さな領域23を取
り、正常なはんだ付が保障される公差内にある部品リー
ドが必ず存在する領域とする。従って、該領域23は全
てリード有りの状態とならなければいけない。また点線
22の外側に領域24を設ける、正常な部品リードなら
ば、この領域24内に入ることは無い、2値化されたシ
ルエツト像20のうち、リードズレ21およびリード浮
き25の双方とも前述の条件を満足することができず、
不良として判定する。
Referring to FIG. 4, 19 out of 20 binarized silhouette images of component leads will be described.
21 is a silhouette image of a normal lead, and 21 is a silhouette image of a component lead with a bent lead. In the dictionary 10 corresponding to the silhouette image, a dotted line 22 is an area where a normal lead should be located. Therefore, a region 23, which is smaller than the region 22, is selected as a region where there are always component leads within a tolerance that guarantees normal soldering. Therefore, all of the areas 23 must be in a leaded state. In addition, a region 24 is provided outside the dotted line 22.If the component lead is normal, it will not fall within this region 24.In the binarized silhouette image 20, both the lead deviation 21 and the lead floating 25 are as described above. unable to satisfy the conditions,
Judged as defective.

なお、領域23および領域24を点線22に近づけるこ
とにより、判定基準が厳しく、また逆に遠ざけることに
より、より甘い判定基準となる。
It should be noted that by moving the regions 23 and 24 closer to the dotted line 22, the criterion becomes stricter, and by moving the regions 23 and 24 farther away, the criterion becomes more lenient.

本実施例によれば、部品形状毎の検出基準は、パターン
マツチングするための辞書のみであり、簡単に部品形状
の違いに対応することができる。
According to this embodiment, the detection standard for each component shape is only a dictionary for pattern matching, and it is possible to easily deal with differences in component shapes.

また、判定基準を辞書中のパターン領域の大小で設定で
きるため、光量というアナログ量によって判定する従来
技術に比べ高精度な判定が可能である。
Furthermore, since the determination criterion can be set based on the size of the pattern area in the dictionary, more accurate determination is possible than in the prior art, which makes determinations based on analog quantities such as the amount of light.

〔発明の効果〕〔Effect of the invention〕

以上説明したように1本発明は電子部品のリード曲りを
例えば2値化されたシルエット画像信号としてとらえ、
これを辞書として予め保持しておいた部品形状毎の画像
信号と比較して、その領域のズレをもとに曲りを検出す
るものであり、特に、辞書としての画像信号は電気的に
任意に設定できることから、電子部品の種類、形状が変
っても容易にこれに対応することができ、さらに検出精
度の向上も可能になる。
As explained above, one aspect of the present invention captures lead bending of electronic components as, for example, a binary silhouette image signal,
This is compared with an image signal for each component shape that is stored in advance as a dictionary, and bends are detected based on the deviation in that area. In particular, the image signal as a dictionary can be electrically arbitrarily Since the settings can be made, it is possible to easily adapt to changes in the type and shape of electronic components, and it is also possible to improve detection accuracy.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の一実施例の側面図、第2図は第1図の
うち部品とプレートの関係を示す斜視図。 第3図は第2図の部品とプレートを接触させた場合の斜
視図、第4図は部品リードの画像と辞書との関係を示す
平面図、第5図は従来技術による部品リード曲り検出方
法を説明する図である。 1・・・部品、 2・・・部品把持装置、3・・・シリ
ンダ、 4・・・プレート、5.6・・・投光器、 7
・・・カメラ、8・・・2値化回路、 9・・・マツチ
ング回路、10・・・辞書、 11・・・良否判定部、
12・・・レーン切換部、  13・・・レーン、14
・・・良品排出スティック。 15・・・不良品排出スティック。 16・・・部品払出しスティック、 17・・・半透明膜。
FIG. 1 is a side view of one embodiment of the present invention, and FIG. 2 is a perspective view showing the relationship between parts and plates in FIG. 1. Fig. 3 is a perspective view of the part shown in Fig. 2 when the plate is in contact with the plate, Fig. 4 is a plan view showing the relationship between the image of the part lead and the dictionary, and Fig. 5 is a conventional method for detecting bending of the part lead. FIG. DESCRIPTION OF SYMBOLS 1... Part, 2... Part gripping device, 3... Cylinder, 4... Plate, 5.6... Floodlight, 7
...Camera, 8.. Binarization circuit, 9.. Matching circuit, 10.. Dictionary, 11.. Quality determination section.
12...Lane switching section, 13...Lane, 14
... Good quality discharge stick. 15... Defective product ejection stick. 16... Parts dispensing stick, 17... Translucent membrane.

Claims (1)

【特許請求の範囲】[Claims] (1)プリント回路板に面付けする電子部品のリード曲
り検出装置において、電子部品を押付けて該電子部品の
リード画像を写出する光学プレートと、予め部品形状毎
の標準リード画像を記憶した記憶手段と、前記電子部品
のリード画像と標準リード画像を比較してリード曲りを
判定する比較判定手段とを有することを特徴とする電子
部品のリード曲り検出装置。
(1) A lead bending detection device for electronic components mounted on a printed circuit board includes an optical plate that presses the electronic component and projects a lead image of the electronic component, and a memory that stores standard lead images for each component shape in advance. An apparatus for detecting lead bending of an electronic component, comprising: means for comparing a lead image of the electronic component with a standard lead image to determine lead bending.
JP61115189A 1986-05-20 1986-05-20 Lead bend detection device for electronic parts Expired - Lifetime JPH0743253B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP61115189A JPH0743253B2 (en) 1986-05-20 1986-05-20 Lead bend detection device for electronic parts
US07/048,725 US4803871A (en) 1986-05-20 1987-05-11 Inspection device for inspecting projections on the surface of parts
KR1019870004630A KR920004752B1 (en) 1986-05-20 1987-05-12 Surface shape detecting system of parts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61115189A JPH0743253B2 (en) 1986-05-20 1986-05-20 Lead bend detection device for electronic parts

Publications (2)

Publication Number Publication Date
JPS62272108A true JPS62272108A (en) 1987-11-26
JPH0743253B2 JPH0743253B2 (en) 1995-05-15

Family

ID=14656554

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61115189A Expired - Lifetime JPH0743253B2 (en) 1986-05-20 1986-05-20 Lead bend detection device for electronic parts

Country Status (1)

Country Link
JP (1) JPH0743253B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5307154A (en) * 1990-12-27 1994-04-26 Sharp Kabushiki Kaisha Semiconductor chip position detector
EP1828714A1 (en) * 2004-11-30 2007-09-05 Mapvision OY Ltd Method and system for optical measurement of the shape of an article

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54150088A (en) * 1978-05-18 1979-11-24 Nec Corp Test device for ic lead bend

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54150088A (en) * 1978-05-18 1979-11-24 Nec Corp Test device for ic lead bend

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5307154A (en) * 1990-12-27 1994-04-26 Sharp Kabushiki Kaisha Semiconductor chip position detector
EP1828714A1 (en) * 2004-11-30 2007-09-05 Mapvision OY Ltd Method and system for optical measurement of the shape of an article
EP1828714A4 (en) * 2004-11-30 2008-03-19 Mapvision Oy Ltd Method and system for optical measurement of the shape of an article

Also Published As

Publication number Publication date
JPH0743253B2 (en) 1995-05-15

Similar Documents

Publication Publication Date Title
US4929845A (en) Method and apparatus for inspection of substrates
US6055055A (en) Cross optical axis inspection system for integrated circuits
JP2002513463A (en) System and method for detecting stress in a molded container
JPH07111998B2 (en) Wire bonding inspection device
JPS62272108A (en) Detecting device for lead curvature of electronic component
JPS61120907A (en) Hole inspection of printed-circuit board
JPH04194701A (en) Picture image inputting method and apparatus and appearance inspecting instrument
JPH09264722A (en) Appearance inspecting method and apparatus therefor
CN110907469A (en) Circuit board welding detection device using machine vision
JP2000200355A (en) Production of check program for cream solder print checking machine
KR0144334B1 (en) Lead inspecting equipment
JP3687392B2 (en) Electronic component lead inspection method and apparatus
JP2839411B2 (en) Inspection device for defective IC
JP3379995B2 (en) Coating agent coating device
JPH0658729A (en) Inspecting apparatus for soldered state
JPH09113242A (en) Method for visually inspecting electronic parts stuck to hoop-like tape type
JPH0394144A (en) Device for inspecting film-like member
JPH08184407A (en) Automatic inspection equipment for mounting printed board
KR0124195Y1 (en) Vision recognition apparatus for p.c.b inspection
JPH03211404A (en) Bend inspection device for connector pin
JPH06258455A (en) Filling inspection equipment for printed wiring board
JPS62229051A (en) Inspecting device
JPH01263542A (en) Apparatus of detecting imperfection in lead shape
JPH0516585B2 (en)
JPH0425043A (en) Ic lead bending inspecting device