JPH08204455A - Noise generator - Google Patents
Noise generatorInfo
- Publication number
- JPH08204455A JPH08204455A JP1176095A JP1176095A JPH08204455A JP H08204455 A JPH08204455 A JP H08204455A JP 1176095 A JP1176095 A JP 1176095A JP 1176095 A JP1176095 A JP 1176095A JP H08204455 A JPH08204455 A JP H08204455A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- noise
- contact point
- contact
- switch
- 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]
【産業上の利用分野】本発明は、広帯域の周波数成分を
有するノイズを発生するノイズ発生器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a noise generator for generating noise having wide band frequency components.
【０００２】[0002]
【従来の技術】例えば、電気機器の絶縁性能が劣化する
と部分放電が発生することが知られている。この部分放
電による電磁波をアンテナ又はプローブで検出すること
により、電気機器の絶縁性能を監視する絶縁監視装置が
ある。このような絶縁監視装置の動作又は誤動作を確認
するために、電気機器の部分放電又はそれに類似したノ
イズを再現するノイズ発生器が使用される。2. Description of the Related Art For example, it is known that partial discharge occurs when the insulation performance of electrical equipment deteriorates. There is an insulation monitoring device that monitors the insulation performance of an electric device by detecting an electromagnetic wave due to this partial discharge with an antenna or a probe. In order to confirm the operation or malfunction of such an insulation monitoring device, a noise generator that reproduces a partial discharge of electric equipment or noise similar thereto is used.
【０００３】従来のノイズ発生器は、図３に示すよう
に、高周波信号Ａを発生するシグナルジェネレータ１１
と、パルスＢを発生するパルスジェネレータ１２の出力
をパルス変調器１３に入力して、高周波信号Ａをパルス
Ｂにより変調して、ノイズを模擬した信号Ｃを発生させ
る。As shown in FIG. 3, a conventional noise generator is a signal generator 11 for generating a high frequency signal A.
Then, the output of the pulse generator 12 that generates the pulse B is input to the pulse modulator 13, the high frequency signal A is modulated by the pulse B, and a signal C simulating noise is generated.
【０００４】[0004]
【発明が解決しようとする課題】上記従来のノイズ発生
器により得られる出力信号Ｃのスペクトラムは、図４に
示すようになり、シグナルジェネレータ１１の発振周波
数ｆ0 のみを有する。これに対して、通常の放電ノイズ
は、図５のスペクトラムに示すように、広帯域の周波数
成分を含む。したがって、従来のノイズ発生器では、実
際の放電ノイズを全周波数域に渡って模擬することがで
きなかった。The spectrum of the output signal C obtained by the conventional noise generator is as shown in FIG. 4, and has only the oscillation frequency f 0 of the signal generator 11. On the other hand, normal discharge noise includes wideband frequency components as shown in the spectrum of FIG. Therefore, the conventional noise generator could not simulate the actual discharge noise over the entire frequency range.
【０００５】また、従来のノイズ発生器は、シグナルジ
ェネレータ１１、パルスジェネレータ１２、パルス変調
器１３を必要として、構成が大掛かりなものとなる。本
発明は、実際の放電ノイズのように、広帯域の周波数成
分を含んだノイズを発生することができ、かつ簡単な構
成のノイズ発生器を提供することを目的とするものであ
る。Further, the conventional noise generator requires a signal generator 11, a pulse generator 12, and a pulse modulator 13, and therefore the construction becomes large. An object of the present invention is to provide a noise generator having a simple structure that can generate noise including a wide band frequency component like actual discharge noise.
【０００６】[0006]
【課題を解決するための手段】本発明は、上記目的を達
成するため、電流が流れる回路と、この回路に流れる電
流を開閉する機械的接点と、この機械的接点を連続的に
開閉する手段によりノイズ発生器を構成する。In order to achieve the above object, the present invention provides a circuit through which a current flows, mechanical contacts for opening and closing the current flowing through the circuit, and means for continuously opening and closing the mechanical contacts. Constitutes a noise generator.
【０００７】[0007]
【作用】機械的接点は、開閉手段に駆動されて回路の電
流を繰り返し開閉する。機械的接点が電流を開閉すると
き、接点間にアークが発生し、このアークによりノイズ
が発生する。このノイズは、広帯域の周波数成分を含む
ものとなる。The mechanical contact is driven by the opening / closing means to repeatedly open / close the current of the circuit. When a mechanical contact opens and closes a current, an arc is created between the contacts, which causes noise. This noise contains wideband frequency components.
【０００８】[0008]
（実施例１）機械的接点としてｂ接点を使用する例を、
本発明の実施例１として、図１を用いて説明する。スイ
ッチ１と電池２の直列接続体に並列に、バイパスコンデ
ンサ３と、ＬＥＤ４と抵抗５の直列接続体が接続され
る。さらに、スイッチ１と電池２の直列接続体に並列
に、コイル６と、コイル６のｂ接点８が接続される。そ
して、ｂ接点８の一方の端子が、リード線１０により図
示しないアンテナ又はＢＣＮコネクタに接続される。(Example 1) An example of using a b contact as a mechanical contact,
A first embodiment of the present invention will be described with reference to FIG. A bypass capacitor 3, a series connection body of an LED 4 and a resistor 5 are connected in parallel to the series connection body of the switch 1 and the battery 2. Further, the coil 6 and the b-contact 8 of the coil 6 are connected in parallel to the series connection body of the switch 1 and the battery 2. Then, one terminal of the b-contact 8 is connected to the antenna (not shown) or the BCN connector by the lead wire 10.
【０００９】ノイズ発生器を動作させる時、スイッチ１
を閉じる。すると、コイル６が励磁され、それによって
ｂ接点８が開く。それによりコイル６の励磁回路が開く
ためコイル６がオフし、ｂ接点８が閉じ再びコイル６が
励磁される。スイッチ１がオンの間、コイル６とｂ接点
８は以上の動作を繰り返し、ｂ接点８がチャタリングを
起こす。このチャタリングの間、ｂ接点８の接点間にア
ークが発生し、このアークによりノイズが発生する。When operating the noise generator, switch 1
Close. Then, the coil 6 is excited and the b-contact 8 is thereby opened. As a result, the exciting circuit of the coil 6 is opened, the coil 6 is turned off, the b contact 8 is closed, and the coil 6 is excited again. While the switch 1 is on, the coil 6 and the b contact 8 repeat the above operation, and the b contact 8 causes chattering. During this chattering, an arc is generated between the contacts of the b-contact 8, and the arc causes noise.
【００１０】そして、このノイズは、リード線１０から
図示しないアンテナ等へ導かれ、アンテナから放射され
る。このアンテナから放射される電磁波は、図５に示す
ように、広帯域の周波数成分を有している。このため、
前述のような、電気機器の絶縁監視装置の動作確認に使
用した場合、全周波数領域に渡って模擬テストを行うこ
とができる。Then, this noise is guided from the lead wire 10 to an antenna (not shown) or the like and radiated from the antenna. The electromagnetic wave radiated from this antenna has a broadband frequency component, as shown in FIG. For this reason,
When it is used to confirm the operation of the insulation monitoring device for electric equipment as described above, a simulation test can be performed over the entire frequency range.
【００１１】なお、バイパスコンデンサ３は、コイル６
に効率良く電流を流すためのものである。また、ＬＥＤ
４は、スイッチ１がオンであることを表示するためのも
のであり、抵抗５はＬＥＤ４に流れる電流を制限するた
めのものである。また、これらバイパスコンデンサ３又
はＬＥＤ４は省略することもできるものである。以上説
明した実施例によれば、広帯域の周波数成分を有するノ
イズを発生させることができると共に、安価な部品を用
いて回路を簡単に構成することができる。The bypass capacitor 3 includes a coil 6
This is for efficiently flowing the electric current. Also LED
4 is for indicating that the switch 1 is on, and the resistor 5 is for limiting the current flowing through the LED 4. Further, the bypass capacitor 3 or the LED 4 can be omitted. According to the embodiment described above, it is possible to generate noise having a broadband frequency component, and at the same time, it is possible to easily configure the circuit by using inexpensive parts.
【００１２】（実施例２）次に、機械的接点としてａ接
点を使用する例を、本発明の実施例２として、図２を用
いて説明する。なお、図２において、図１と同一の機能
を有するものには、同一の符号を付する。また、前記実
施例１と重複する説明は省略する。スイッチ１と電池２
の直列接続体に並列に、ＬＥＤ４と抵抗５の直列接続体
が接続される。さらに、スイッチ１と電池２の直列接続
体に、抵抗７を介して、バイパスコンデンサ３と、コイ
ル６と、このコイル６のａ接点９とが、並列に接続され
る。そして、ａ接点９の一方の端子が、リード線１０に
より図示しないアンテナ又はＢＣＮコネクタに接続され
る。(Embodiment 2) Next, an example in which an a-contact is used as a mechanical contact will be described as Embodiment 2 of the present invention with reference to FIG. In FIG. 2, the same reference numerals are given to those having the same functions as those in FIG. Further, the description overlapping with that of the first embodiment will be omitted. Switch 1 and battery 2
The serial connection body of the LED 4 and the resistor 5 is connected in parallel to the serial connection body of. Further, the bypass capacitor 3, the coil 6, and the a-contact 9 of the coil 6 are connected in parallel to the series connection body of the switch 1 and the battery 2 via the resistor 7. Then, one terminal of the a-contact 9 is connected to an antenna (not shown) or a BCN connector by a lead wire 10.
【００１３】ノイズ発生器を動作させる時、スイッチ１
を閉じる。すると、コイル６が励磁され、それによって
ａ接点９が閉じる。これによりコイル６に電流が流れな
くなるため、コイル６がオフし、ａ接点９が開く。これ
により再びコイル６に電流が流れるようになり、ａ接点
が閉じる。スイッチ１がオンの間、コイル６とａ接点は
以上の動作を繰り返し、ａ接点９がチャタリングを起こ
す。When operating the noise generator, switch 1
Close. Then, the coil 6 is excited, and thereby the a contact 9 is closed. As a result, no current flows through the coil 6, so the coil 6 is turned off and the a contact 9 is opened. As a result, a current again flows in the coil 6 and the a contact is closed. While the switch 1 is on, the coil 6 and the a contact repeat the above operation, and the a contact 9 causes chattering.
【００１４】このチャタリングの間、上記の実施例１と
同様に、ａ接点９の接点間にアークが発生し、このアー
クによりノイズが発生する。本実施例２も、前記実施例
１と同様の作用、効果を奏する。During this chattering, an arc is generated between the contacts of the a contact 9 as in the first embodiment, and noise is generated by this arc. The second embodiment also has the same operation and effect as the first embodiment.
【００１５】[0015]
【発明の効果】本発明によれば、実際の放電ノイズのよ
うに、広帯域の周波数成分を含んだノイズを発生するこ
とができ、かつ簡単な構成のノイズ発生器を得ることが
できる。According to the present invention, it is possible to generate a noise including a wide band frequency component like actual discharge noise, and to obtain a noise generator having a simple structure.
【図１】本発明のノイズ発生器の実施例１の回路図。FIG. 1 is a circuit diagram of a noise generator according to a first embodiment of the present invention.
【図２】本発明のノイズ発生器の実施例２の回路図。FIG. 2 is a circuit diagram of a noise generator according to a second embodiment of the present invention.
【図３】従来のノイズ発生器を示すブロック図。FIG. 3 is a block diagram showing a conventional noise generator.
【図４】図３のノイズ発生器の出力信号のスペクトラム
を示すグラフ。FIG. 4 is a graph showing a spectrum of an output signal of the noise generator shown in FIG.
【図５】放電ノイズのスペクトラムを示すグラフ。FIG. 5 is a graph showing a spectrum of discharge noise.
１…スイッチ ２…電池 ３…バイパスコンデンサ ４…ＬＥＤ ５，７…抵抗 ６…コイル ８…ｂ接点 ９…ａ接点 １０…リード線 １１…シグナルジェネレータ １２…パルスジェネレータ １３…パルス変調器 Ａ…高周波信号 Ｂ…パルス Ｃ…出力信号 1 ... Switch 2 ... Battery 3 ... Bypass capacitor 4 ... LED 5,7 ... Resistance 6 ... Coil 8 ... B contact 9 ... A contact 10 ... Lead wire 11 ... Signal generator 12 ... Pulse generator 13 ... Pulse modulator A ... High frequency signal B ... pulse C ... output signal
Claims (1)
電流を開閉する機械的接点と、この機械的接点を連続的
に開閉する手段を具備することを特徴とするノイズ発生
器。1. A noise generator comprising: a circuit through which a current flows, a mechanical contact for opening and closing the current flowing through the circuit, and means for continuously opening and closing the mechanical contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1176095A JPH08204455A (en) | 1995-01-27 | 1995-01-27 | Noise generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1176095A JPH08204455A (en) | 1995-01-27 | 1995-01-27 | Noise generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08204455A true JPH08204455A (en) | 1996-08-09 |
Family
ID=11786944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1176095A Pending JPH08204455A (en) | 1995-01-27 | 1995-01-27 | Noise generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08204455A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012018070A (en) * | 2010-07-08 | 2012-01-26 | Hioki Ee Corp | False discharge generator and circuit substrate inspection device |
| JP2013190342A (en) * | 2012-03-14 | 2013-09-26 | Toshiba Mitsubishi-Electric Industrial System Corp | Partial discharge measurement system and partial discharge measurement method by repeated impulse voltage |
-
1995
- 1995-01-27 JP JP1176095A patent/JPH08204455A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012018070A (en) * | 2010-07-08 | 2012-01-26 | Hioki Ee Corp | False discharge generator and circuit substrate inspection device |
| JP2013190342A (en) * | 2012-03-14 | 2013-09-26 | Toshiba Mitsubishi-Electric Industrial System Corp | Partial discharge measurement system and partial discharge measurement method by repeated impulse voltage |
| US9322881B2 (en) | 2012-03-14 | 2016-04-26 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Partial discharge measurement system and partial discharge measurement method by repeated impulse voltage |
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