JP2000214192A - Method and apparatus for measuring current direction - Google Patents
Method and apparatus for measuring current directionInfo
- Publication number
- JP2000214192A JP2000214192A JP1383099A JP1383099A JP2000214192A JP 2000214192 A JP2000214192 A JP 2000214192A JP 1383099 A JP1383099 A JP 1383099A JP 1383099 A JP1383099 A JP 1383099A JP 2000214192 A JP2000214192 A JP 2000214192A
- Authority
- JP
- Japan
- Prior art keywords
- current
- printed wiring
- wiring board
- point
- potential difference
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は静電気の放電電流の
電子機器に対する影響を測定するために電流方向を測定
する測定方法及び測定装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring method and a measuring apparatus for measuring a current direction in order to measure an influence of an electrostatic discharge current on an electronic device.
【０００２】[0002]
【従来の技術】静電気放電によって電子機器に誤動作を
引き起こすことがある。このような外部からの静電気放
電に対して電子機器側では、プリント配線板の設計時点
で技術者が理想と思われる配線を行っており、プリント
配線板が製品に組み込まれた後の誤動作発生に対して
は、主に経験と勘に頼って配線変更などの対応を行って
いた。2. Description of the Related Art A malfunction may occur in electronic equipment due to electrostatic discharge. At the time of designing a printed wiring board, engineers are performing wiring that is considered ideal at the time of designing the printed wiring board against such electrostatic discharge from the outside, and malfunction may occur after the printed wiring board is incorporated into the product. On the other hand, they mainly responded to changes in wiring, etc., relying on experience and intuition.
【０００３】[0003]
【発明が解決しようとする課題】しかしながらこのよう
な従来の対策方法では、誤動作部分の特定が困難であ
り、対策に多くの時間がかかる。静電気放電によって発
生する過渡電流がＩＣのＧＮＤや電源を流れた場合に、
そのＩＣ自体の応答遅れによって誤動作することがあ
る。又互いに通信を行っている２個のＩＣ間でＧＮＤに
電位差や位相差があった場合、２個のＩＣのしきい値の
ずれによって誤動作が発生するが、誤動作現象を見ただ
けでは原因を知ることができないという問題があった。However, in such a conventional countermeasure method, it is difficult to identify a malfunctioning portion, and it takes a lot of time for the countermeasure. When a transient current generated by electrostatic discharge flows through the IC GND or power supply,
A malfunction may occur due to the response delay of the IC itself. If there is a potential difference or a phase difference in GND between two ICs communicating with each other, a malfunction occurs due to a shift in the threshold value of the two ICs. There was a problem that we could not know.
【０００４】本発明は静電気放電によって発生する静電
気放電電流が電子機器に及ぼす誤動作という現象を、プ
リント配線板上を流れる静電気放電電流の方向を測定す
ることにより、電子機器の誤動作の原因を調査できるよ
うにすることを目的とする。According to the present invention, the phenomenon of malfunction caused by an electrostatic discharge current generated by electrostatic discharge on an electronic device can be investigated by measuring the direction of the electrostatic discharge current flowing on a printed wiring board to investigate the cause of the malfunction of the electronic device. The purpose is to be.
【０００５】[0005]
【課題を解決するための手段】本願の請求項１の発明
は、電子部品が実装されたプリント配線板における任意
の基準電位地点から電流を注入し、電流注入に対する任
意の第１地点と第２地点における電位差を求めることに
より、前記第１地点と第２地点間の電流方向を測定する
ことを特徴とするものである。According to the invention of claim 1 of the present application, a current is injected from an arbitrary reference potential point on a printed wiring board on which an electronic component is mounted, and an arbitrary first point and a second point with respect to the current injection. The current direction between the first point and the second point is measured by calculating a potential difference at the point.
【０００６】本願の請求項２の発明は、電子部品が実装
されたプリント配線板の任意の基準電位地点に電流を注
入する電流注入手段と、前記プリント配線板上の任意の
第１地点と第２地点にプローブが接続され、その間の電
位差を検出する電位差検出手段と、前記電位差検出手段
の出力を表示する表示手段と、を具備することを特徴と
するものである。According to a second aspect of the present invention, there is provided a current injecting means for injecting a current to an arbitrary reference potential point of a printed wiring board on which electronic components are mounted, an arbitrary first point on the printed wiring board, A probe is connected to two points, and comprises a potential difference detecting means for detecting a potential difference therebetween, and a display means for displaying an output of the potential difference detecting means.
【０００７】本願の請求項３の発明は、電子部品が実装
されたプリント配線板の任意の基準電位地点に電流を注
入する電流注入手段と、前記プリント配線板上の任意の
第１地点と第２地点にプローブが接続され、その間の電
位差を検出する電位差検出手段と、前記電位差検出手段
の出力を表示する表示手段と、前記表示手段の出力を演
算処理し表示する演算処理手段と、前記電流注入手段に
よる電流注入を制御する制御手段と、を具備することを
特徴とするものである。According to a third aspect of the present invention, there is provided a current injecting means for injecting a current to an arbitrary reference potential point of a printed wiring board on which an electronic component is mounted, an arbitrary first point on the printed wiring board, and A probe is connected to two points, a potential difference detecting means for detecting a potential difference therebetween, a display means for displaying an output of the potential difference detecting means, an arithmetic processing means for arithmetically processing and displaying an output of the display means, and the current Control means for controlling current injection by the injection means.
【０００８】[0008]
【発明の実施の形態】（実施の形態１）図１は本発明の
第１の実施の形態による電流方向測定装置の構成を示す
システム構成図である。本図において、電流注入用プロ
ーブ１、第１地点電圧測定用プローブ２、第２地点電圧
測定用プローブ３は、夫々プリント配線板４に電流を注
入し、第１地点，第２地点の電圧を測定するものであ
る。電流注入用プローブ１には任意ノイズ発生器５が接
続される。任意ノイズ発生器５は電流注入用プローブ１
と共にプリント配線板上の任意の基準電圧点に電流を注
入する電流注入手段を構成している。又プローブ２及び
３は電位差検出器６に接続される。電位差検出器６はこ
れらのプローブが接触する２点の電位差を検出するもの
であって、その出力はオシロスコープ等の表示装置７に
接続されている。そし前述した電流注入用プローブ１及
び第１地点，第２地点の電圧測定用プローブ２，３はプ
ローブ台８に取付けられる。プローブ台８はＸＹテーブ
ル９により駆動され、プリント配線板４の大きさに対応
してＸＹ方向に移動できるようになっている。プリント
配線板４はプリント配線固定台１０上に保持される。第
１，第２地点電圧測定用プローブ２，３と電圧検出器６
とは、プリント配線板上の第１地点と第２地点の間の電
位差を検出する電位差検出手段を構成している。(Embodiment 1) FIG. 1 is a system configuration diagram showing a configuration of a current direction measuring device according to a first embodiment of the present invention. In the figure, a current injection probe 1, a first point voltage measurement probe 2, and a second point voltage measurement probe 3 respectively inject a current into the printed wiring board 4 and change the voltages at the first point and the second point. It is to be measured. An arbitrary noise generator 5 is connected to the current injection probe 1. The arbitrary noise generator 5 is a current injection probe 1
Together, they constitute a current injection means for injecting a current into an arbitrary reference voltage point on the printed wiring board. The probes 2 and 3 are connected to a potential difference detector 6. The potential difference detector 6 detects a potential difference between two points where these probes come in contact with each other, and the output thereof is connected to a display device 7 such as an oscilloscope. The probe 1 for current injection and the probes 2 and 3 for voltage measurement at the first and second points are attached to the probe base 8. The probe table 8 is driven by an XY table 9 and can move in the XY directions according to the size of the printed wiring board 4. The printed wiring board 4 is held on a printed wiring fixing stand 10. First and second voltage measuring probes 2 and 3 and voltage detector 6
"Constitutes a potential difference detecting means for detecting a potential difference between the first point and the second point on the printed wiring board.
【０００９】次にこの実施の形態の動作について説明す
る。電流注入用プローブ１、第１地点電圧測定用プロー
ブ２、第２地点電圧測定用プローブ３を３本ともプロー
ブ台８にセットした状態で、プリント配線板固定台１０
の上にプリント配線板４をのせる。そして任意ノイズ発
生器５から事前に調査済みの製品の障害となるノイズを
発生させ、電流注入用プローブ１を介してプリント配線
板４に注入する。注入したノイズに対する第１地点の応
答を第１地点電圧測定用プローブ２で、第２地点の応答
を第２地点電圧測定用プローブ３で測定して、電位差検
出器６でその電位差を検出する。電位差検出器６の出力
を表示装置７で表示し、極性や位相を測定する。こうし
て電流注入用プローブ１から注入した電流に応答して流
れる任意の２地点間の電流方向を測定する。そして電流
注入用プローブ１の位置を変えることにより、プリント
配線板４のどの地点にノイズを注入すれば第１地点と第
２地点の間に最も大きい電位差を発生させるかを確認す
ることができる。又、第１地点電圧測定用プローブ２、
第２地点電圧測定用プローブ３の取り付け位置を変える
ことにより、プリント配線板４上のあらゆる位置の電流
方向を測定することが可能となる。Next, the operation of this embodiment will be described. With the current injection probe 1, the first-point voltage measurement probe 2, and the second-point voltage measurement probe 3 all set on the probe stand 8, the printed wiring board fixing stand 10 is set.
The printed wiring board 4 is placed on the substrate. Then, a noise which is an obstacle to a product which has been investigated in advance is generated from the arbitrary noise generator 5 and injected into the printed wiring board 4 via the current injection probe 1. The response at the first point to the injected noise is measured by the first point voltage measuring probe 2, and the response at the second point is measured by the second point voltage measuring probe 3, and the potential difference is detected by the potential difference detector 6. The output of the potential difference detector 6 is displayed on the display device 7, and the polarity and phase are measured. Thus, the current direction between any two points flowing in response to the current injected from the current injection probe 1 is measured. By changing the position of the current injection probe 1, it is possible to confirm at which point on the printed wiring board 4 noise is injected to generate the largest potential difference between the first point and the second point. Also, the first point voltage measurement probe 2,
By changing the attachment position of the second point voltage measurement probe 3, the current direction at any position on the printed wiring board 4 can be measured.
【００１０】従って電子機器が外部からの静電気放電に
よって誤動作した場合にその原因を究明する際、電流注
入端子を実際の放電箇所にセットし、電流方向を測定し
たい第１地点と第２地点に測定用プロ−ブを当て、電流
注入用プローブ１から電流を注入し、この２点間の電位
差を測定し、波形を表示することにより電流方向が把握
できる。第１地点と第２地点は、プリント配線板４上で
電位差が発生してはいけない２個のＩＣ間のＧＮＤ、あ
るいは一つのＩＣの中に複数存在するＧＮＤとすること
ができる。このようなポイントは技術者が容易に特定で
きるものであるので、簡単なプロ−ブ接続によって誤動
作の究明が可能になり、静電気放電対策の効率化を図る
ことができる。Therefore, when an electronic device malfunctions due to an electrostatic discharge from the outside, when investigating the cause, the current injection terminal is set to the actual discharge point, and the current direction is measured at the first point and the second point where the current direction is to be measured. A current is injected from the current injection probe 1 by applying a current probe, a potential difference between the two points is measured, and a waveform is displayed so that the current direction can be grasped. The first point and the second point can be a GND between two ICs in which a potential difference should not occur on the printed wiring board 4 or a GND existing in a plurality of ICs. Since such points can be easily specified by a technician, malfunction can be investigated by simple probe connection, and the efficiency of electrostatic discharge countermeasures can be improved.
【００１１】（実施の形態２）本実施の形態は実施の形
態１の構成に加えて、パーソナルコンピュータ等の制御
装置を組み込んで電流方向測定装置をコントロールする
ようにしたシステム構成図である。図２において任意ノ
イズ発生器５の制御を通信線１２を介して行い、表示装
置７の設定と表示装置７の出力データの取り込みを通信
線１３を介して行う。パーソナルコンピュータ１１を用
いることによって任意ノイズ発生器５の駆動のタイミン
グやレベルなどを制御することができる。パーソナルコ
ンピュータ１１の演算機能によって電流の相対的な大き
さとその方向を表示させたり、必要な解析をすることが
できる。ここでパーソナルコンピュータ１１は演算処理
手段と電流注入を制御する制御手段との機能を有してい
る。(Embodiment 2) In the present embodiment, in addition to the structure of Embodiment 1, a control device such as a personal computer is incorporated to control a current direction measuring device. In FIG. 2, the control of the arbitrary noise generator 5 is performed via a communication line 12, and the setting of the display device 7 and the capture of output data of the display device 7 are performed via a communication line 13. By using the personal computer 11, it is possible to control the drive timing and level of the arbitrary noise generator 5. The relative function and the direction of the current can be displayed by the arithmetic function of the personal computer 11 and necessary analysis can be performed. Here, the personal computer 11 has a function of an arithmetic processing unit and a control unit for controlling current injection.
【００１２】尚、以上の説明では、プリント配線板固定
台に固定されたプリント配線板上の電流方向を測定する
構成を説明したが、電流注入用プローブ１と第１地点電
圧測定用プローブ２、第２地点電圧測定用プローブ３を
プローブ台８から分離して測定するように構成すること
もできる。In the above description, the configuration for measuring the current direction on the printed wiring board fixed to the printed wiring board fixing stand has been described. However, the current injection probe 1 and the first point voltage measurement probe 2, The second point voltage measuring probe 3 may be configured to be separated from the probe table 8 for measurement.
【００１３】[0013]
【発明の効果】以上のように本願の請求項１，２の発明
による電流方向測定方法及び装置によれば、プリント配
線板上で電位差が発生してはいけない２地点間の電流測
定を容易に行うことができる。又請求項３の発明では、
演算処理部や制御部を組み込むことにより短時間でプリ
ント配線板全体の２点間の電流の流れ方を測定すること
ができるようになる。これにより、設計初期段階で効率
的な配線制御を検討することができる。更に、原因を把
握することで必要な対策をとることができ、製品の信頼
性の向上と静電気放電による誤動作対策時間の短縮を実
現できるものである。As described above, according to the current direction measuring method and apparatus according to the first and second aspects of the present invention, it is possible to easily measure the current between two points where a potential difference must not occur on a printed wiring board. It can be carried out. In the invention of claim 3,
By incorporating an arithmetic processing unit and a control unit, it becomes possible to measure the flow of current between two points on the entire printed wiring board in a short time. As a result, efficient wiring control can be considered at the initial stage of design. Further, necessary measures can be taken by grasping the cause, thereby improving the reliability of the product and shortening the time required for measures against malfunction due to electrostatic discharge.
【図１】本発明の実施の形態１による電流方向測定装置
を示す斜視図である。FIG. 1 is a perspective view showing a current direction measuring device according to a first embodiment of the present invention.
【図２】本発明の実施の形態２による電流方向測定装置
を示す斜視図である。FIG. 2 is a perspective view showing a current direction measuring device according to a second embodiment of the present invention.
１ 電流注入用プローブ ２ 第１地点電圧測定用プローブ ３ 第２地点電圧測定用プローブ ４ プリント配線板 ５ 任意ノイズ発生器 ６ 電位差検出器 ７ 表示装置 ８ プローブ台 ９ ＸＹテーブル １０ プリント配線板固定台 １１ パーソナルコンピュータ １２，１３ 通信線 DESCRIPTION OF SYMBOLS 1 Current injection probe 2 1st-point voltage measurement probe 3 2nd-point voltage measurement probe 4 Printed wiring board 5 Arbitrary noise generator 6 Potential difference detector 7 Display device 8 Probe stand 9 XY table 10 Printed wiring board fixing stand 11 Personal computer 12, 13 Communication line
Claims (3)
おける任意の基準電位地点から電流を注入し、電流注入
に対する任意の第１地点と第２地点における電位差を求
めることにより、前記第１地点と第２地点間の電流方向
を測定することを特徴とする電流方向測定方法。An electric current is injected from an arbitrary reference potential point on a printed wiring board on which an electronic component is mounted, and a potential difference between an arbitrary first point and an arbitrary second point with respect to the current injection is obtained. A method of measuring a current direction, comprising measuring a current direction between second points.
任意の基準電位地点に電流を注入する電流注入手段と、 前記プリント配線板上の任意の第１地点と第２地点にプ
ローブが接続され、その間の電位差を検出する電位差検
出手段と、 前記電位差検出手段の出力を表示する表示手段と、を具
備することを特徴とする電流方向測定装置。2. A current injection means for injecting a current at an arbitrary reference potential point on a printed wiring board on which electronic components are mounted, and a probe connected to arbitrary first and second points on the printed wiring board. A potential difference detecting means for detecting a potential difference therebetween, and a display means for displaying an output of the potential difference detecting means.
任意の基準電位地点に電流を注入する電流注入手段と、 前記プリント配線板上の任意の第１地点と第２地点にプ
ローブが接続され、その間の電位差を検出する電位差検
出手段と、 前記電位差検出手段の出力を表示する表示手段と、 前記表示手段の出力を演算処理し表示する演算処理手段
と、 前記電流注入手段による電流注入を制御する制御手段
と、を具備することを特徴とする電流方向測定装置。3. A current injection means for injecting a current at an arbitrary reference potential point on a printed wiring board on which an electronic component is mounted, and a probe connected to arbitrary first and second points on the printed wiring board. A potential difference detecting means for detecting a potential difference therebetween, a display means for displaying an output of the potential difference detecting means, an arithmetic processing means for arithmetically processing and displaying an output of the display means, and controlling a current injection by the current injection means. A current direction measuring device, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1383099A JP2000214192A (en) | 1999-01-22 | 1999-01-22 | Method and apparatus for measuring current direction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1383099A JP2000214192A (en) | 1999-01-22 | 1999-01-22 | Method and apparatus for measuring current direction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000214192A true JP2000214192A (en) | 2000-08-04 |
Family
ID=11844204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1383099A Pending JP2000214192A (en) | 1999-01-22 | 1999-01-22 | Method and apparatus for measuring current direction |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000214192A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009053074A (en) * | 2007-08-28 | 2009-03-12 | Shishido Seidenki Kk | Electric field detection device |
| KR20170034421A (en) * | 2014-09-24 | 2017-03-28 | 도시바 미쓰비시덴키 산교시스템 가부시키가이샤 | Method for managing assembling process of electrical product |
-
1999
- 1999-01-22 JP JP1383099A patent/JP2000214192A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009053074A (en) * | 2007-08-28 | 2009-03-12 | Shishido Seidenki Kk | Electric field detection device |
| KR20170034421A (en) * | 2014-09-24 | 2017-03-28 | 도시바 미쓰비시덴키 산교시스템 가부시키가이샤 | Method for managing assembling process of electrical product |
| CN106716276A (en) * | 2014-09-24 | 2017-05-24 | 东芝三菱电机产业系统株式会社 | Method for managing assembling process of electrical product |
| KR101947928B1 (en) * | 2014-09-24 | 2019-02-13 | 도시바 미쓰비시덴키 산교시스템 가부시키가이샤 | Method for managing assembling process of electrical product |
| US10234489B2 (en) | 2014-09-24 | 2019-03-19 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Method for managing assembling process of electrical product |
| CN106716276B (en) * | 2014-09-24 | 2019-09-06 | 东芝三菱电机产业系统株式会社 | The management method of the assembly process of electric product |
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