JPH0843449A - How to check the operation of the electric field sensor - Google Patents
How to check the operation of the electric field sensorInfo
- Publication number
- JPH0843449A JPH0843449A JP6194785A JP19478594A JPH0843449A JP H0843449 A JPH0843449 A JP H0843449A JP 6194785 A JP6194785 A JP 6194785A JP 19478594 A JP19478594 A JP 19478594A JP H0843449 A JPH0843449 A JP H0843449A
- Authority
- JP
- Japan
- Prior art keywords
- electric field
- photo detector
- field sensor
- light source
- photodetector
- 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
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ＥＭＣ分野や電気ノイ
ズの検出のほか、電気機器やケーブル等において発生す
る電界の強度や波形を測定する電界センサ、及び電波信
号を受けて、光信号に変換する光電界センサの動作確認
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an EMC field and detection of electric noise, and an electric field sensor for measuring the strength and waveform of an electric field generated in electric equipment, cables, etc. The present invention relates to a method for confirming the operation of an optical electric field sensor for conversion.
【０００２】[0002]
【従来の技術】電界センサを使った電界、あるいは電磁
ノイズの検出は、図２に示す構成のもとで行われるのが
一般的である。この方法は、電界強度に依存して、透過
する光強度が変化する性質を利用したものである。この
検出方式は、電界強度を非接触で、光に変換して検出
し、光ファイバによって光電変換器に伝達し、ここで、
初めて電気信号として、計測器や受信器に伝送して検出
するため、伝達路線系と環境との間にノイズの授受がな
いこと等の特徴がある。2. Description of the Related Art Detection of an electric field or electromagnetic noise using an electric field sensor is generally performed under the configuration shown in FIG. This method utilizes the property that the transmitted light intensity changes depending on the electric field intensity. In this detection method, the electric field strength is converted into light in a non-contact manner, detected, and transmitted to a photoelectric converter by an optical fiber.
For the first time, it is transmitted as an electric signal to a measuring instrument or a receiver for detection, so that there is no transmission and reception of noise between the transmission line system and the environment.
【０００３】[0003]
【発明が解決しようとする課題】ここで、本電界センサ
による電界の測定においては、電界センサの光検出器、
あるいは光検出器に接続された増幅器に異常がある場合
でも、電界の強度や波形を検出する場合があり、この状
態での測定結果は正しくない。しかし、測定結果が正し
いかどうかの判断ができない。Here, in the measurement of the electric field by the electric field sensor, the photodetector of the electric field sensor,
Alternatively, even if the amplifier connected to the photodetector is abnormal, the intensity or waveform of the electric field may be detected, and the measurement result in this state is incorrect. However, it is impossible to judge whether the measurement result is correct.
【０００４】本発明は、こうした事態に鑑み、電界セン
サによる測定の前に、光検出器、あるいは光検出器と光
検出器に接続された増幅器の動作を確認する方法、又は
測定器のキャリブレーション方法を提供するものであ
る。In view of such a situation, the present invention provides a method for confirming the operation of a photodetector, or a photodetector and an amplifier connected to the photodetector, or calibration of a measuring device before measurement by an electric field sensor. It provides a method.
【０００５】[0005]
【課題を解決するための手段】前記の課題を解決するた
めに、本発明は、透過する光出力強度が、印加する電界
の強度に依存して変化する構成とした電界センサの動作
確認方法として、本電界センサによる電界の測定の前
に、光源を直接変調することにより、この変調した光の
変調信号、例えば、光源へ加えた変調信号や、動作確認
をしたい光検出器とは別の光検出器で、この変調した光
を変換した変調信号等と、この変調した光を動作確認す
る光検出器を通して変換した出力信号とを比較すること
を特徴とする電界センサの動作確認方法である。光源へ
加えた変調信号で比較する場合は、他の検出器等を必要
とせずに装置を簡略化できる。一方、変調した光を検出
して変調信号を取り出すのは、装置としては複雑になる
が、動作確認をする光検出器に入る光の変調信号そのも
ので比較できるため、前者に比べて光源の変調の際の特
性を厳密に考慮しなくてもよい。In order to solve the above-mentioned problems, the present invention provides a method for confirming the operation of an electric field sensor in which the transmitted light output intensity changes depending on the intensity of an applied electric field. By directly modulating the light source before measuring the electric field by this electric field sensor, the modulated signal of this modulated light, for example, the modulated signal applied to the light source or the light different from the photodetector whose operation is to be confirmed It is a method for confirming the operation of an electric field sensor, characterized in that a detector compares a modulated signal or the like obtained by converting the modulated light with an output signal obtained by converting the modulated light through a photodetector for confirming the operation. When the comparison is made with the modulation signal applied to the light source, the device can be simplified without the need for another detector or the like. On the other hand, it is complicated for the device to detect the modulated light and extract the modulated signal, but since it can be compared with the modulated signal itself of the light entering the photodetector for checking the operation, the modulation of the light source compared It is not necessary to strictly consider the characteristics at the time of.
【０００６】[0006]
【作用】本電界センサによる電界の測定の前に、光源を
直接変調することにより、光検出器、あるいは光検出器
と光検出器に接続された増幅器の出力信号を検出し、該
検出信号と光源の変調信号とを比較して、光検出器、あ
るいは光検出器と光検出器に接続された増幅器の動作を
確認することができる。Before the electric field is measured by the electric field sensor, the light source is directly modulated to detect the output signal of the photodetector or the photodetector and the amplifier connected to the photodetector. The operation of the photodetector or the photodetector and the amplifier connected to the photodetector can be confirmed by comparing with the modulation signal of the light source.
【０００７】[0007]
【実施例】以下に、本発明の一実施例を示す。EXAMPLE An example of the present invention will be described below.
【０００８】図１に、本発明による電界センサの光検出
器と光検出器に接続された増幅器の動作を確認する装置
の構成を示す。FIG. 1 shows the configuration of an apparatus for confirming the operation of the photodetector of the electric field sensor and the amplifier connected to the photodetector according to the present invention.
【０００９】電界センサヘッド１に電界を印加しない状
態で、光源を変調信号発生器７により直接変調して、光
検出器３に接続された増幅器４からの出力信号を検出
し、この検出信号と、光検出器３および増幅器４を通ら
ない光源の変調信号とを比較器８で比較して、光検出器
と光検出器に接続された増幅器の動作の正否を確認す
る。次に、光源から一定強度の光を出力して、電界セン
サヘッド１に電界を印加して、電界の測定を行う。In the state where no electric field is applied to the electric field sensor head 1, the light source is directly modulated by the modulation signal generator 7 to detect the output signal from the amplifier 4 connected to the photodetector 3, and the detected signal The comparator 8 compares the modulation signal of the light source that does not pass through the photodetector 3 and the amplifier 4 to confirm whether the operation of the photodetector and the amplifier connected to the photodetector is correct. Next, a constant intensity of light is output from the light source and an electric field is applied to the electric field sensor head 1 to measure the electric field.
【００１０】[0010]
【発明の効果】以上、説明したように、本発明によれ
ば、光検出器、あるいは光検出器と光検出器に接続され
た増幅器の動作を電界の測定前に確認でき、電界センサ
による測定データの信頼性が向上する。As described above, according to the present invention, the operation of the photodetector or the photodetector and the amplifier connected to the photodetector can be confirmed before measuring the electric field, and the measurement by the electric field sensor can be performed. Improves data reliability.
【００１１】なお、図１において、増幅器４からの出力
に代わって、光検出器３からの出力を比較器８の入力と
してもよい。In FIG. 1, instead of the output from the amplifier 4, the output from the photodetector 3 may be the input to the comparator 8.
【図１】本発明の実施例において用いた電界センサの構
成を示す説明図。FIG. 1 is an explanatory diagram showing a configuration of an electric field sensor used in an example of the present invention.
【図２】従来の電界センサの構成を示す説明図。FIG. 2 is an explanatory diagram showing a configuration of a conventional electric field sensor.
１ 電界センサヘッド ２ 光源 ３ 光検出器 ４ 増幅器 ５ 光ファイバ ６ 導線 ７ 変調信号発生器 ８ 比較器 ９ 電源 1 Electric Field Sensor Head 2 Light Source 3 Photo Detector 4 Amplifier 5 Optical Fiber 6 Conductor 7 Modulation Signal Generator 8 Comparator 9 Power Supply
Claims (1)
の強度に依存して変化するように構成した電界センサヘ
ッドと、前記変化する光を検出する光検出器よりなる電
界センサの動作確認方法であって、光源を直接変調し、
この変調した光の変調信号と、この変調した光を光検出
器を通して変換した出力信号とを比較することを特徴と
する電界センサの動作確認方法。1. A method for confirming the operation of an electric field sensor comprising a light source and an electric field sensor head configured to change depending on the strength of an electric field applied with light from the light source, and a photodetector for detecting the changing light. And directly modulate the light source,
A method for confirming the operation of an electric field sensor, comprising: comparing the modulated signal of this modulated light with an output signal obtained by converting this modulated light through a photodetector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6194785A JPH0843449A (en) | 1994-07-26 | 1994-07-26 | How to check the operation of the electric field sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6194785A JPH0843449A (en) | 1994-07-26 | 1994-07-26 | How to check the operation of the electric field sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0843449A true JPH0843449A (en) | 1996-02-16 |
Family
ID=16330226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6194785A Pending JPH0843449A (en) | 1994-07-26 | 1994-07-26 | How to check the operation of the electric field sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0843449A (en) |
-
1994
- 1994-07-26 JP JP6194785A patent/JPH0843449A/en active Pending
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