JPH0755852A - Voltage detector - Google Patents
Voltage detectorInfo
- Publication number
- JPH0755852A JPH0755852A JP22786793A JP22786793A JPH0755852A JP H0755852 A JPH0755852 A JP H0755852A JP 22786793 A JP22786793 A JP 22786793A JP 22786793 A JP22786793 A JP 22786793A JP H0755852 A JPH0755852 A JP H0755852A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- conductive material
- probe
- covered
- voltage detector
- 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
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、非接触状態あるいは
接触状態で電圧を計測して表示する検電器に用いるプロ
ーブに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a probe used in a voltage detector for measuring and displaying a voltage in a non-contact state or a contact state.
【０００２】[0002]
【従来の技術】従来より電圧を計測して表示する手段と
して検電器が広く用いられている。2. Description of the Related Art Conventionally, a voltage detector has been widely used as a means for measuring and displaying a voltage.
【０００３】図３は検電器の一例を示す概略斜視図であ
る。本体１の一端には、導電性ゴムで成るプローブ２が
装着されており、このプローブ２にて計測対象の電圧が
検出される。検出された電圧は検電プローブ２に接続さ
れかつ本体１に内蔵された分圧手段にて分圧される。そ
して、分圧手段の出力電圧は分圧手段に接続されかつ本
体１に内蔵された計測表示手段にて計測され、その値が
本体１の側面に配設された液晶表示板３に表示される。FIG. 3 is a schematic perspective view showing an example of a voltage detector. A probe 2 made of conductive rubber is attached to one end of the main body 1, and the probe 2 detects a voltage to be measured. The detected voltage is connected to the detection probe 2 and divided by the voltage dividing means built in the main body 1. Then, the output voltage of the voltage dividing means is measured by the measuring and displaying means which is connected to the voltage dividing means and built in the main body 1, and the value is displayed on the liquid crystal display plate 3 provided on the side surface of the main body 1. .
【０００４】このような構成において、例えば絶縁被覆
電線の電圧を計測し表示させたい場合は、作業者が検電
器の本体１を持ってプローブ２を絶縁被覆電線の表面に
押し当て、本体１に配設されたスイッチ４を押す。これ
により絶縁被覆電線の電圧が計測され、その値が液晶表
示板３に表示される。上述した検電方法は非接触状態の
場合であるが、計測対象の電圧充電部に直接触れること
ができる場合は、非接触状態での検電時の結合容量変化
に起因する誤差を回避するために、プローブ２を計測対
象の電圧充電部に接触させて検電を行なうことがある。
なお、この場合においても非接触検電時と同様、検電器
のアース側は本体１を介して人体へ容量結合されてい
る。In such a structure, for example, when it is desired to measure and display the voltage of the insulation-coated electric wire, an operator holds the main body 1 of the voltage detector and presses the probe 2 against the surface of the insulation-coated electric wire, The switch 4 provided is pushed. As a result, the voltage of the insulation-coated wire is measured, and the value is displayed on the liquid crystal display board 3. The above-mentioned voltage detection method is for a non-contact state, but if the voltage charging unit to be measured can be directly touched, in order to avoid an error caused by a change in coupling capacitance during power detection in a non-contact state. In some cases, the probe 2 may be brought into contact with the voltage charging unit to be measured to perform voltage detection.
Also in this case, the ground side of the voltage detector is capacitively coupled to the human body through the body 1 as in the non-contact voltage detection.
【０００５】[0005]
【発明が解決しようとする課題】上述した従来の検電器
に用いられているプローブは、導電性ゴムで成っている
ため、摩擦係数が大きくかつたわみ易く、その抵抗値は
たかだか数＋ｋΩである。従って、例えば家庭用電源の
コンセント等の狭い隙間に差込むことが困難であるた
め、差込み最中に誤まってプローブに触れると感電のお
それがあり、検電作業の安全面で問題があった。また、
導電性ゴムの抵抗値のばらつきから、検電精度が低いと
いう欠点があった。Since the probe used in the above-mentioned conventional voltage detector is made of conductive rubber, it has a large friction coefficient and is easily bent, and its resistance value is at most + kΩ. Therefore, for example, it is difficult to insert it into a narrow gap such as an outlet of a household power supply, and if the user accidentally touches the probe during insertion, there is a risk of electric shock, which is a problem in terms of safety of power detection work. . Also,
Due to the variation in the resistance value of the conductive rubber, there has been a drawback that the accuracy of detection is low.
【０００６】この発明は上述した事情から成されたもの
であり、この発明の目的は、検電作業の安全性が高く、
かつ検電精度が高い検電器を提供することにある。The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a highly safe electric power detection work.
Another object is to provide a voltage detector with high voltage detection accuracy.
【０００７】[0007]
【課題を解決するための手段】この発明は、非接触状態
あるいは接触状態で電圧を計測して表示する検電器に用
いるプローブに関するものであり、この発明の上記目的
は、第１の導電材を絶縁性の樹脂で被覆し、さらに第２
の導電材で被覆してなる前記電圧を検出するためのプロ
ーブを具備することによって達成される。SUMMARY OF THE INVENTION The present invention relates to a probe used in a voltage detector for measuring and displaying a voltage in a non-contact state or a contact state, and the above object of the present invention is to provide a first conductive material. Coated with insulating resin, then second
It is achieved by providing a probe for detecting the voltage, which is coated with a conductive material.
【０００８】[0008]
【作用】この発明にあっては、プローブを構成する第１
の導電材を絶縁性の高い樹脂で被覆し、さらに第２の導
電材で被覆し、かつ第１の導電材と第２の導電材を絶縁
するようにしているので、人体が触れたときの感電を防
止することができると共に検電精度を高めることができ
る。According to the present invention, the first part of the probe is constructed.
Since the conductive material is coated with a resin having a high insulating property, and further is coated with the second conductive material, and the first conductive material and the second conductive material are insulated from each other, It is possible to prevent electric shock and improve the accuracy of electric detection.
【０００９】[0009]
【実施例】図１はこの発明の検電器に用いるプローブの
一例を示す概略斜視図であり、図２はその側面断面図で
ある。1 is a schematic perspective view showing an example of a probe used in a voltage detector of the present invention, and FIG. 2 is a side sectional view thereof.
【００１０】このプローブ１０は、検電器の本体に内蔵
された分圧手段に配線１１を介して接続され、周囲が絶
縁性の樹脂１２で覆われ、さらにその周囲が第２の導電
材１４で覆われた第１の導電材１３で成る。導電材１４
で覆われる部分はプローブ１０の先端の一部となり、接
触検電の際に作業者がこれに触れる事は少ない。さら
に、第１の導電材１３と第２の導電材１４とは絶縁性の
樹脂１２により絶縁されているので、作業者が誤まって
プローブ１０に触れても感電のおそれはなく、検電作業
の安全性を高めることが出来ると共に、第２の導電材１
４は等電位に保たれるので、計測対象の電圧充電部への
プローブ１０の押圧力や接触面積等の影響を受けずに高
精度な検電を行なうことができる。この絶縁性の樹脂１
２としてフレキシブルであって耐環境性の高いものを用
いれば使用時の破損等を減少させて長寿命化を図ること
ができるので、例えばポリイミド樹脂が使用される。そ
して、ポリイミド樹脂で被覆した後、さらにポリプロピ
レンで裏打ちすれば、強度上さらに優れたものとなる。
また、第１及び第２の導電材１３，１４としては導電性
の良好なものが計測上望ましく、例えば銅箔が使用され
る。第２の導電材１４を被覆する方法としては、例えば
箔状のものを巻き付けたり接着する方法、板状のものを
接着する方法、あるいはキャップ状に形成して絶縁性の
樹脂１２に嵌合する方法等がある。The probe 10 is connected to the voltage dividing means built in the main body of the voltage detector via the wiring 11, the periphery thereof is covered with the insulating resin 12, and the periphery thereof is further covered with the second conductive material 14. It is composed of the covered first conductive material 13. Conductive material 14
The part covered with is a part of the tip of the probe 10, and the operator rarely touches it during contact voltage detection. Furthermore, since the first conductive material 13 and the second conductive material 14 are insulated by the insulating resin 12, there is no risk of electric shock even if the operator touches the probe 10 by mistake, and the electric power detection work is performed. The safety of the second conductive material 1
Since 4 is kept at an equipotential, it is possible to perform highly accurate voltage detection without being affected by the pressing force of the probe 10 on the voltage charging unit to be measured or the contact area. This insulating resin 1
For example, a polyimide resin is used because it is possible to reduce the damage during use and to prolong the service life by using a flexible material having high environmental resistance as 2. Then, after coating with a polyimide resin and further backing with polypropylene, the strength is further improved.
Further, as the first and second conductive materials 13 and 14, those having good conductivity are desirable in measurement, and for example, copper foil is used. As a method of coating the second conductive material 14, for example, a foil-shaped material is wound or bonded, a plate-shaped material is bonded, or a cap-shaped material is fitted to the insulating resin 12. There are ways.
【００１１】ここで、プローブを従来の導電型からこの
発明の絶縁型に変えても検電作業に支障がないことを説
明する。計測対象とプローブの対向面積を数十ｍｍ２と
し、樹脂膜の厚みを１００μｍ程度と仮定すると、静電
容量は数百ｐＦとなる。まず、接触状態での検電時にお
いては、計測対象の電源周波数が５０Ｈｚであったと仮
定しても、プローブの交流インピーダンスはたかだか数
ＭΩであり、検電器本体の入力インピーダンスを１ＧΩ
程度に設定してやればプローブの電圧損失は極めて少な
い。そして、本発明においては、第２の導電材を被覆す
る事によって接触検電時の検電精度を著しく向上させる
ことができる。すなわち検電対象が上記第２の導電材の
任意の点に接触する事により、この表面が検電対象と同
電位となり、検電対象とプローブとの接触面積及び角度
に関わりなく、測定対象と第２の導電材との間に常に一
定の静電容量を形成する事となり、検電精度が向上す
る。非接触状態での検電時においては、計測対象側を覆
っている絶縁物の結合容量への寄与の方が格段に大き
く、プローブ側の樹脂膜の有無は無視し得る。すなわ
ち、導電型のプローブを用いたときでさえ計測対象とプ
ローブとの結合容量は数ｐＦと低く、絶縁型のプローブ
を用いたときに挿入される数百ｐＦの直列静電容量は無
視し得るのである。本発明においては、検電対象と第２
の導電材との間及び第２の導電材と第１の導電材との間
は共に容量結合となり、プローブに導電プラスチックを
使用した場合と比べてより純粋なコンデンサとして扱う
事ができ、本出願人が提案している容量型分圧回路と共
に精度を向上できる。Here, it will be explained that even if the probe is changed from the conventional conductivity type to the insulation type of the present invention, there is no hindrance to the power detection work. Assuming that the facing area between the measurement target and the probe is several tens of mm 2 and the thickness of the resin film is approximately 100 μm, the electrostatic capacitance is several hundred pF. First, at the time of voltage detection in a contact state, even assuming that the power supply frequency of the measurement target was 50 Hz, the AC impedance of the probe was at most several MΩ, and the input impedance of the voltage detector main body was 1 GΩ.
The voltage loss of the probe is extremely small if it is set to a certain level. Further, in the present invention, by coating the second conductive material, it is possible to remarkably improve the accuracy of voltage detection during contact voltage detection. That is, when the object to be detected comes into contact with an arbitrary point of the second conductive material, this surface has the same potential as the object to be detected, and the surface of the object to be measured is irrespective of the contact area and angle between the object to be detected and the probe. Since a constant capacitance is always formed between the second conductive material and the second conductive material, the detection accuracy is improved. At the time of voltage detection in a non-contact state, the contribution of the insulator covering the measurement target side to the coupling capacitance is significantly larger, and the presence or absence of the resin film on the probe side can be ignored. That is, even when the conductive probe is used, the coupling capacitance between the measurement target and the probe is as low as a few pF, and the series capacitance of several hundred pF inserted when the insulating probe is used can be ignored. Of. In the present invention, the target of voltage detection and the second
Both the second conductive material and the second conductive material are capacitively coupled, and can be treated as a pure capacitor as compared with the case where a conductive plastic is used for the probe. The accuracy can be improved together with the capacitive voltage divider circuit proposed by a person.
【００１２】[0012]
【発明の効果】以上のようにこの発明の検電器によれ
ば、検電作業の安全性を高めることができると共に検電
精度を高めることができるので、検電作業の迅速化を図
ることができると共に、小型で高精度の検電器の普及率
を高めることができる。As described above, according to the voltage detector of the present invention, the safety of the voltage detection work can be improved and the accuracy of the voltage detection can be improved, so that the power detection work can be speeded up. At the same time, it is possible to increase the penetration rate of small-sized and high-precision electroscopes.
【図１】この発明の検電器に用いるプローブの一例を示
す概略斜視図である。FIG. 1 is a schematic perspective view showing an example of a probe used in a voltage detector of the present invention.
【図２】図１に示すこの発明の検電器に用いるプローブ
の側面断面図である。FIG. 2 is a side sectional view of a probe used in the voltage detector of the present invention shown in FIG.
【図３】検電器の一例を示す概略斜視図である。FIG. 3 is a schematic perspective view showing an example of a voltage detector.
１ 本体 ２，１０ プローブ ３ 液晶表示板 ４ スイッチ １１ 配線 １２ 樹脂 １３ 第１の導電材 １４ 第２の導電材 DESCRIPTION OF SYMBOLS 1 main body 2,10 probe 3 liquid crystal display board 4 switch 11 wiring 12 resin 13 first conductive material 14 second conductive material
Claims (2)
り前記計測対象の電圧を計測して表示する検電器におい
て、第１の導電材を絶縁性の樹脂で被覆し、さらに第２
の導電材で被覆してなる前記電圧を検出するためのプロ
ーブを備えたことを特徴とする検電器。1. In a voltage detector for measuring and displaying a voltage of the measurement target by bringing the measurement target close to or in contact with the measurement target, the first conductive material is coated with an insulating resin, and the second conductive material is further coated.
2. A voltage detector comprising a probe for detecting the voltage, the probe being coated with the conductive material.
１に記載の検電器。2. The voltage detector according to claim 1, wherein the resin is a polyimide resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22786793A JPH0755852A (en) | 1993-08-23 | 1993-08-23 | Voltage detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22786793A JPH0755852A (en) | 1993-08-23 | 1993-08-23 | Voltage detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0755852A true JPH0755852A (en) | 1995-03-03 |
Family
ID=16867601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22786793A Pending JPH0755852A (en) | 1993-08-23 | 1993-08-23 | Voltage detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0755852A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011001826A1 (en) * | 2009-06-29 | 2011-01-06 | 長谷川電機工業株式会社 | Voltage detector and manufacturing method thereof |
-
1993
- 1993-08-23 JP JP22786793A patent/JPH0755852A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011001826A1 (en) * | 2009-06-29 | 2011-01-06 | 長谷川電機工業株式会社 | Voltage detector and manufacturing method thereof |
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