JPS62293168A - Optical system voltage sensor - Google Patents
Optical system voltage sensorInfo
- Publication number
- JPS62293168A JPS62293168A JP61136563A JP13656386A JPS62293168A JP S62293168 A JPS62293168 A JP S62293168A JP 61136563 A JP61136563 A JP 61136563A JP 13656386 A JP13656386 A JP 13656386A JP S62293168 A JPS62293168 A JP S62293168A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- electro
- voltage sensor
- sensor
- measured
- 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
- 230000003287 optical effect Effects 0.000 title claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 21
- 239000013078 crystal Substances 0.000 claims description 3
- 230000005684 electric field Effects 0.000 abstract description 10
- 238000007493 shaping process Methods 0.000 abstract description 2
- 239000013307 optical fiber Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 8
- 238000005259 measurement Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 239000012212 insulator Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
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、電気光学効果を用いて電圧を測定する光方式
電圧センサに関するものであり、特に電圧側定時電圧セ
ンサ近傍の電界に対して電圧センサを保護する構成に関
するものである。Detailed Description of the Invention 3. Detailed Description of the Invention Field of Industrial Application The present invention relates to an optical voltage sensor that measures voltage using an electro-optic effect, and particularly relates to an optical voltage sensor that measures voltage using an electro-optical effect. The present invention relates to a configuration for protecting a voltage sensor against electric fields.
従来の技術
従来、電圧特に送電線や屋内変電設備などの高電圧を取
扱う場所において、その測定手段として保守点検が簡単
で安定性があり、しかも小型な装置あるいはセンサが求
められている。2. Description of the Related Art Conventionally, there has been a demand for devices or sensors that are easy to maintain and inspect, are stable, and are compact as means for measuring voltage, especially in places where high voltages are handled, such as power transmission lines and indoor substation equipment.
このような要望に対し、最近光を応用した電圧測定が急
速に開発されてきた。そしてこれらの測定は、一時的な
保守点検時のみではなく常時その測定を行ない異常の発
見を目的としている。またこのような光を応用した電圧
測定では先端センサ部のみ送電線部に固定したり、被測
定装置内部の狭い場所に挿入し測定する場合がある。こ
の場合、センサ部は測定する電圧以外に周囲に近接する
配線及び装置、部品などの電界の影響を受ける。電界は
高電圧を有する配線と周囲の接地部分との間に生じ、電
気が送電されている個所には存在する。In response to such demands, voltage measurement using light has recently been rapidly developed. The purpose of these measurements is not only during temporary maintenance and inspection, but also at all times to discover abnormalities. Further, in voltage measurement using such light, only the tip sensor portion may be fixed to the power transmission line portion or may be inserted into a narrow space inside the device to be measured. In this case, the sensor section is affected not only by the voltage to be measured but also by electric fields from nearby wiring, devices, components, and the like. Electric fields are created between wires carrying high voltage and the surrounding ground, and are present wherever electricity is being transmitted.
一方、電気光学素子は結晶軸に対する光の屈折率が異な
り、その屈折率は電界によって変化を生じることを利用
している。従って、比較的低い電圧を測定する場合はあ
るいは高い電圧を降圧させ測定する場合電圧端子を直接
電気光学素子に接触させて電圧印加を行ないその作用に
より測定を行なっている。On the other hand, electro-optical elements utilize the fact that the refractive index of light with respect to the crystal axis is different, and that the refractive index changes depending on the electric field. Therefore, when measuring a relatively low voltage or stepping down a high voltage, the voltage terminal is brought into direct contact with the electro-optical element to apply the voltage, and the measurement is performed based on the effect.
発明が解決しようとする問題点
しかしながら、上記従来のセンサでは、電気光字素子の
周辺に高電圧を有する装置あるいは送電線が近接する場
合、その電界の影響を受け、電極に直接電圧をかけて位
相変調が生じた変化量と電界により生じた変化量が加算
されて現われてしまうことになり、真の電圧値を知るこ
とができなかった。Problems to be Solved by the Invention However, in the above-mentioned conventional sensor, when a device with a high voltage or a power transmission line is close to the electro-optical element, it is affected by the electric field and it is difficult to directly apply voltage to the electrode. The amount of change caused by phase modulation and the amount of change caused by the electric field are added together and appear, making it impossible to know the true voltage value.
問題点を解決するための手段
本発明は上記の問題点を解決するために、電気光学素子
を使用した電圧測定センサ部を金属体で包含した構成と
し、外部よシ与えられる電界の影響と内部の電気光学素
子が受けないようにしたものである。Means for Solving the Problems In order to solve the above problems, the present invention has a structure in which a voltage measurement sensor section using an electro-optical element is enclosed in a metal body, and the influence of an external electric field and the internal This is to prevent the electro-optical element from being affected.
作 用
本発明は、上記の構成により測定しようとする電圧をセ
ンサの外部端子に接続するだけで他の影響を受けること
なく測定可能となり、しかも光方式であり、電気光学素
子による位相変調をうけた透過光であるため光ファイバ
のような伝送体を使用することにより、変化が極めて少
ない信号を遠隔地まで送ることが可能である。Effect of the Invention The present invention uses the above-described configuration to enable measurement of the voltage to be measured without being affected by other effects by simply connecting it to the external terminal of the sensor.Moreover, it is an optical method, and is subject to phase modulation by an electro-optical element. Since this is transmitted light, it is possible to send a signal with very little change to a remote location by using a transmission medium such as an optical fiber.
また、センサ部を金属体で包含することによシ環境に対
する信頼性が向上する。Furthermore, by surrounding the sensor section with a metal body, reliability against the environment is improved.
実施例
第１図に、本発明の一実施例の光方式電圧センサの概要
を示す。第１図に示す電圧センサ部は透過型の電圧セン
サを示すもので光は図の入方向より入射しＢ方向に透過
するがその中間に偏光子１を通過し電気光学素子２を通
過した後位相整形３のためのシ波長板を介して検光子４
を通過する。Embodiment FIG. 1 shows an outline of an optical voltage sensor according to an embodiment of the present invention. The voltage sensor section shown in FIG. 1 is a transmission type voltage sensor, in which light enters from the entrance direction in the figure and is transmitted in the B direction, passing through a polarizer 1 in the middle, and after passing through an electro-optical element 2. Analyzer 4 via wavelength plate for phase shaping 3
pass through.
その際電気光学素子には、電圧測定のための外部端子６
に被測定電圧８が印加され、印加電圧に比例した量だけ
電気光学素子２中を通過する光が位相変調を受ける。さ
らに電気光学素子２上の特定の対向２面には金属膜７に
よる電極が形成され、外部端子６が接続されている。ま
たこのような構成をした電気光学素子２を金属体（線の
みで表示）８で包含している。At this time, the electro-optical element has an external terminal 6 for voltage measurement.
A voltage to be measured 8 is applied to the electro-optical element 2, and the light passing through the electro-optical element 2 undergoes phase modulation by an amount proportional to the applied voltage. Further, electrodes made of a metal film 7 are formed on two specific opposing surfaces of the electro-optical element 2, and external terminals 6 are connected to the electrodes. Further, the electro-optical element 2 having such a configuration is included in a metal body 8 (represented only by lines).
第２図は本実施例のセンサの具体構成を示す。FIG. 2 shows the specific configuration of the sensor of this embodiment.
第２図ａは反射型タイプの電圧センサ部全体斜視図であ
る。反射型タイプの電圧センサでは、光の入射と出射を
同一の光ファイバで行なうため外観状は電圧センサより
一本の光ファイバのみが出た形状となっている。FIG. 2a is an overall perspective view of a reflective type voltage sensor section. In a reflective type voltage sensor, light is input and output through the same optical fiber, so the external appearance is such that only one optical fiber protrudes from the voltage sensor.
光ファイバ２１は電圧センサ２２の一端面２３から内部
に挿入され、他の端面２４には、内部電気光学素子（図
示せず）に電圧を印加するための外部端子２５が設置さ
れている。内部電気光学素子及び他の部品（図示せず）
はすべて箱状の金属ケース体２６に収納されており外部
端子２５と金属ケース体２６のすき間は絶縁体２７で隔
離されている。The optical fiber 21 is inserted into the voltage sensor 22 from one end surface 23, and the other end surface 24 is provided with an external terminal 25 for applying a voltage to an internal electro-optical element (not shown). Internal electro-optical elements and other components (not shown)
are all housed in a box-shaped metal case body 26, and a gap between the external terminal 25 and the metal case body 26 is separated by an insulator 27.
第２図すは反射型タイプの電圧センサ部の断面図である
。ａで示した図で同一なものには同一番号を示す。FIG. 2 is a sectional view of a reflective type voltage sensor section. The same numbers are given to the same parts in the figure shown in a.
まず光ファイバ２１は樹脂２４で被ωされた一部を除去
し石英ファイバ部２８を出し偏光子および検光子２９、
コリメートレンズ３ｏ、電気光学素子３１、波長波板３
２、反射ミラー３３が一体化さ几た電圧センサ部に接続
し、光フアイバ内を透過した光が効率よく電圧センサ部
に入射してさらに反射ミラー３３により光ファイバに戻
すよう調整し固定するものである。さらに電気光学素子
の特定の面には金属膜３４が形成され、それより金属細
線３６により外部端子２Ｓに接続せられている。First, the part of the optical fiber 21 coated with the resin 24 is removed, and the quartz fiber part 28 is taken out, and the polarizer and analyzer 29 are removed.
Collimator lens 3o, electro-optical element 31, wavelength wave plate 3
2. Connected to the integrated voltage sensor section with a reflecting mirror 33, adjusted and fixed so that the light transmitted through the optical fiber efficiently enters the voltage sensor section and is further returned to the optical fiber by the reflecting mirror 33. It is. Further, a metal film 34 is formed on a specific surface of the electro-optical element, and is connected to the external terminal 2S by a thin metal wire 36.
上記のように構成されたセンサ部を箱状金属ケース体２
６内に収納するものである。なお金属ケース体２６と外
部端子２５は絶縁体２７で絶縁分離されている。The sensor section configured as described above is attached to the box-shaped metal case body 2.
6. Note that the metal case body 26 and the external terminal 25 are insulated and separated by an insulator 27.
さらに本実施例では電気光学素子として、ＬｉＮｂｏ３
（リテユウムナイオベート）結晶を用いることにより
温度特性の良好な電圧センサを形成している。Furthermore, in this example, LiNbo3 is used as an electro-optical element.
(lithium niobate) crystal is used to form a voltage sensor with good temperature characteristics.
このような電圧センサを金属体内に収納した形状にする
ことにより電圧測定時に周辺の電界の影響を１００分の
１程度に減少させることが出来ることが確認された。It has been confirmed that by housing such a voltage sensor in a metal body, the influence of surrounding electric fields can be reduced to about 1/100 when measuring voltage.
本実施例では電圧センサ全体を金属体で包含する形を説
明したが、効果はやや劣るが金属体による包含面精を小
さくしても同様の効果は確認でき、形状を制限するもの
ではない。また本実施例では、内部電圧センサ部に対し
保護体をせず金属体を形成したが、樹脂などによる第１
の保護体を形成し、その外側に金属体を形成しても、そ
の効果はかわらない。In this embodiment, a form in which the entire voltage sensor is covered by a metal body has been described, but although the effect is slightly inferior, the same effect can be confirmed even if the surface area of the metal body is reduced, and the shape is not limited. Furthermore, in this example, a metal body was formed without a protective body for the internal voltage sensor part, but the first
Even if a protective body is formed and a metal body is formed on the outside of the protective body, the effect remains the same.
さらに、金属体で内部を保護する構成となるため外部環
境特に湿度などに対する信頼性が向上する。Furthermore, since the interior is protected by a metal body, reliability against the external environment, especially humidity, is improved.
なお、本実施例では、電気光学素子にＬ ｉＮ ｂ Ｏ
３を用いたが同様の効果を有する素子であれば他の材料
であっても使用できる。In addition, in this example, L iN b O is used in the electro-optical element.
3 was used, but other materials can be used as long as they have similar effects.
発明の効果
以上のように、本発明によれば、電圧を測定する際に配
電線あるいは電圧センサ周辺の装置に存在する電界の影
響を受けることなく電圧のみを測定することができる。Effects of the Invention As described above, according to the present invention, only voltage can be measured without being influenced by electric fields existing in power distribution lines or devices around the voltage sensor.
また、光方式によるため伝送線の間で電界磁界などの影
響をうけることはない。さらＫ、金属体による包含によ
り耐環境性が向上させることが可能である。Furthermore, since it uses an optical method, it is not affected by electric and magnetic fields between transmission lines. Furthermore, environmental resistance can be improved by inclusion of K in a metal body.
第１図は本発明の一実施例のセンサの概要を示す構成図
、第２図ｄは本実施ｆｌＪの電圧センサの外観斜視図、
第２図すは同電圧センサの断面図である。
１．４．２９・・・・・・偏光子、検光子、２，３１・
・・・・・電気光学素子、３，３２・・・・・・り波長
板、５，２５・・・・・・外部端子、６・・・・・・被
測定電圧、７・・・・・金属膜、８．２６・・・・・・
金属体（金属ケース）、２１・・・・・・光ファイバ、
２２・・・・・・電圧センサ全体、２３ 、２４・・・
・・・電圧センサ端面、２７・・・・・絶縁体、２８・
・・・・・光フアイバ内の石英ファイバ、３ｏ・・・・
・コリメートレンズ、３３・・・・・・反射ミラー、３
４・・・・・・光フアイバ内の樹脂被覆。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
６彼測建電王
第２図
（α）
２１光フアイバ
２５外部燭子
（ｂ）FIG. 1 is a configuration diagram showing an outline of a sensor according to an embodiment of the present invention, FIG. 2 d is an external perspective view of a voltage sensor of this embodiment flJ,
FIG. 2 is a sectional view of the same voltage sensor. 1.4.29...Polarizer, analyzer, 2,31.
...Electro-optical element, 3, 32... Wave plate, 5, 25... External terminal, 6... Voltage to be measured, 7...・Metal film, 8.26...
Metal body (metal case), 21... Optical fiber,
22... Entire voltage sensor, 23, 24...
... Voltage sensor end face, 27 ... Insulator, 28.
...Quartz fiber in optical fiber, 3o...
・Collimating lens, 33...Reflection mirror, 3
4...Resin coating inside the optical fiber. Name of agent: Patent attorney Toshio Nakao and 1 other person 1st
Figure 6 Figure 2 (α) 21 optical fiber 25 external candle (b)
Claims (2)
部を、金属体で包含してなる光方式電圧センサ。(1) An optical voltage sensor in which a metal body encompasses a voltage sensor section including an electro-optical element through which transmitted light passes.
請求の範囲第１項記載の光方式電圧センサ。(2) The optical voltage sensor according to claim 1, wherein a LiNb_3 crystal is used as the electro-optical element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61136563A JPS62293168A (en) | 1986-06-12 | 1986-06-12 | Optical system voltage sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61136563A JPS62293168A (en) | 1986-06-12 | 1986-06-12 | Optical system voltage sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62293168A true JPS62293168A (en) | 1987-12-19 |
Family
ID=15178168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61136563A Pending JPS62293168A (en) | 1986-06-12 | 1986-06-12 | Optical system voltage sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62293168A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63241366A (en) * | 1987-03-27 | 1988-10-06 | Ngk Insulators Ltd | Optical part |
-
1986
- 1986-06-12 JP JP61136563A patent/JPS62293168A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63241366A (en) * | 1987-03-27 | 1988-10-06 | Ngk Insulators Ltd | Optical part |
| US5083221A (en) * | 1987-03-27 | 1992-01-21 | Ngk Insulators, Ltd. | Optical unit having means for electrically shielding electrooptical |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0083196B1 (en) | Voltage and electric field measuring device using light | |
| US4465969A (en) | Voltage and electric field measuring device using light | |
| EP0086373A1 (en) | Magneto-optical converter | |
| US11402410B2 (en) | Optical Pockels voltage sensor assembly device and methods of use thereof | |
| US4531092A (en) | Optoelectronic system for measuring electric or magnetic quantities utilizing a dual light beam of different wavelengths | |
| US4608535A (en) | Magnetic field and current measuring device using a Faraday cell with a thin electrically conductive film substantially covering the Faraday cell | |
| US6008927A (en) | Optical fiber modulator having an optical fiber having a poled portion serving as an electrooptic element and method for making same | |
| US5304920A (en) | Optical current transformer | |
| JPS62293168A (en) | Optical system voltage sensor | |
| US5083221A (en) | Optical unit having means for electrically shielding electrooptical | |
| Bosselmann | Electric and magnetic field sensing for high-voltage applications | |
| JPS58140716A (en) | Magnetic field-light transducer | |
| JPH019933Y2 (en) | ||
| Jaeger et al. | Bias of integrated optics Pockels cell high-voltage sensors | |
| EP0866975A1 (en) | Electro-optic voltage sensor | |
| JP3235301B2 (en) | Light voltage sensor | |
| DE3931543A1 (en) | Polarimeter arrangement for measuring polarisation plane rotation - has half wave delay plate with electrical rotation of main optical axis | |
| Cheng et al. | Packaging method and temperature characteristics of miniature e-field probe with fiber-lInBo3 evanescent coupler | |
| JPH08327669A (en) | Magnetooptical field sensor | |
| JPS59151065A (en) | Optical current transformer | |
| Moghisi | Optical fibre voltage and current sensors | |
| JPH09274056A (en) | Current measuring device for optical fiber | |
| Park | Development and testing of fiber optic current transducer with digital signal processing | |
| JPS5957170A (en) | Electric current measuring apparatus | |
| Zhihe et al. | Experimental research on the polarization modulation of twisted single-mode fibers |