JP2001324518A - Noncontact type ammeter - Google Patents
Noncontact type ammeterInfo
- Publication number
- JP2001324518A JP2001324518A JP2000183735A JP2000183735A JP2001324518A JP 2001324518 A JP2001324518 A JP 2001324518A JP 2000183735 A JP2000183735 A JP 2000183735A JP 2000183735 A JP2000183735 A JP 2000183735A JP 2001324518 A JP2001324518 A JP 2001324518A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- output
- electric path
- current
- magnetic
- 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]
【発明に属する技術分野】この発明は、電路に流れてい
る電流を、電路から測定器センサーの距離の影響を少な
くし簡易に測定する、測定器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 instrument for easily measuring a current flowing in an electric circuit with less influence of a distance between the electric circuit and a measuring sensor.
【０００２】[0002]
【従来の技術】従来の電路と電流測定器に接続部を設け
ない方法で測定する電流測定器は、電路周囲に鉄心など
の磁気閉回路を作り、磁気回路内の磁束数によって電流
を測定する方法があった。2. Description of the Related Art A conventional current measuring device for measuring by a method in which a connection portion is not provided between an electric circuit and a current measuring device forms a magnetic closed circuit such as an iron core around the electric circuit and measures the current by the number of magnetic fluxes in the magnetic circuit. There was a way.
【０００３】[0003]
【発明が解決しようとする課題】従来の電流測定器は電
路周りに鉄心などの磁気閉回路を作らなければならない
ため、次のような欠点があった。 イ．電路の周囲に鉄心を入れるための空間が必要であっ
た。 ロ．電路の太さ以上の内径の有る鉄心を作る必要があっ
た。 ハ．高電圧回路の測定は感電の危険があった。 本発明は、これらの欠点を解決するために発明されたも
のである。The conventional current measuring device has the following disadvantages because a magnetic closed circuit such as an iron core must be formed around the electric circuit. I. There was a need for a space around the circuit to accommodate the iron core. B. It was necessary to make an iron core with an inner diameter larger than the diameter of the electric circuit. C. Measurement of the high voltage circuit was a risk of electric shock. The present invention has been made to solve these disadvantages.
【０００４】[0004]
【課題を解決するための手段】図１の様に一定の間隔を
空けて磁気センサ１（２）、磁気センサ２（３）の磁気
検出部を設ける。 そして、磁気センサの出力を演算回
路（４）に入力して演算し出力部にメータ（５）を設け
て電路の電流値を測定する。 演算回路（４）の回路内
容は図２において イ．磁気センサ１（２）の出力と磁気センサ２（３）の
出力を、それぞれ増幅回路１（６）と増幅回路２（７）
で増幅する。 ロ．増幅回路１（６）と増幅回路２（７）の出力を乗算
回路（８）に入力し乗算する。 ハ．増幅回路１（６）の出力から減算回路（９）を使用
し、増幅回路２（７）の出力を減算する。 ニ．乗算回路（８）の出力を除算回路（１０）を使用
し、減算回路（９）の出力で除算する。 ホ．除算回路（１０）の出力を電流目盛のついたメータ
（５）に入力する。 以上の非接触型電流計で電路の電流を測定する。As shown in FIG. 1, the magnetic sensors 1 (2) and 2 (3) are provided with magnetic detectors at regular intervals as shown in FIG. Then, the output of the magnetic sensor is input to an arithmetic circuit (4) to perform an arithmetic operation, and a meter (5) is provided at an output section to measure a current value of an electric circuit. The circuit content of the arithmetic circuit (4) is shown in FIG. The output of the magnetic sensor 1 (2) and the output of the magnetic sensor 2 (3) are respectively used as an amplifier circuit 1 (6) and an amplifier circuit 2 (7).
Amplify with B. The outputs of the amplifier circuits 1 (6) and 2 (7) are input to the multiplier circuit (8) and multiplied. C. A subtraction circuit (9) is used to subtract the output of the amplification circuit 2 (7) from the output of the amplification circuit 1 (6). D. The output of the multiplication circuit (8) is divided by the output of the subtraction circuit (9) using a division circuit (10). E. The output of the division circuit (10) is input to a meter (5) provided with a current scale. The current of the electric circuit is measured by the above-mentioned non-contact type ammeter.
【０００５】[0005]
【発明の実施の形態】以下、本発明の実施の形態を説明
する。図１の電路（１）に流れる電流 Ｉ は電路から
距離χ点の磁束密度と電路からの距離χ＋ｌ点の磁束密
度に比例するそれぞれの出力を演算する事により、電路
からの距離χに影響されないで数１の式により演算する
事にが可能である。この特性を利用した下記構造の電流
測定器を発明した。図１において、一定の間隔を空けて
磁気センサ１（２）、磁気センサ（３）の磁気検出部を
設け、それぞれの出力を数１式の演算をする演算回路
（４）で処理して出力をメータ（５）で電流の大きさと
して指示する。演算回路（４）内部の回路は図２におい
て イ、磁気センサ１（２）の出力と磁気センサ２（３）の
出力を、それぞれ増幅回路１（６）と増幅回路２（７）
で増幅する。 ロ、増幅回路１（６）と増幅回路２（７）の出力を乗算
回路（８）に入力し乗算する。 ハ、増幅回路１（６）の出力から減算回路（９）を使用
し、増幅回路２（７）の出力を減算する。 ニ、乗算回路（８）の出力を除算回路（１０）を使用
し、減算回路（９）の出力で除算する。 ホ、除算回路（１０）の出力を電流目盛のついたメータ
（５）に入力する。 本発明は以上により成り立って、この構造を持った非接
触型電流計を電路に近づけて電路内の電流を測定する。Embodiments of the present invention will be described below. The current I flowing in the electric circuit (1) in FIG. 1 is not affected by the distance か ら from the electric circuit by calculating respective outputs proportional to the magnetic flux density at the point χ from the electric circuit and the magnetic flux density at the point χ + 1 from the electric circuit. It is possible to calculate by the formula of Equation 1. A current measuring device having the following structure utilizing this characteristic was invented. In FIG. 1, magnetic detection units of magnetic sensors 1 (2) and (3) are provided at regular intervals, and their outputs are processed and output by an arithmetic circuit (4) that performs an operation of equation (1). Is indicated as the magnitude of the current by the meter (5). The circuit inside the arithmetic circuit (4) is shown in FIG. 2A. The output of the magnetic sensor 1 (2) and the output of the magnetic sensor 2 (3) are
Amplify with (B) The outputs of the amplifier circuits 1 (6) and 2 (7) are input to the multiplier circuit (8) and multiplied. (C) subtracting the output of the amplification circuit 2 (7) from the output of the amplification circuit 1 (6) using the subtraction circuit (9); D. The output of the multiplication circuit (8) is divided by the output of the subtraction circuit (9) using the division circuit (10). (E) The output of the division circuit (10) is input to a meter (5) having a current scale. According to the present invention, a non-contact type ammeter having this structure is brought close to an electric circuit to measure a current in the electric circuit.
【０００６】[0006]
【発明の効果】本発明を使用する事によって、非接触電
流計を電路に近づけるだけで電流を測定できるため、従
来の電流測定器の様に電路周りに磁気閉回路を作るため
の空間、電路の太さ、使用電圧等の影響を受けずに、電
流を簡易に測定できる。According to the present invention, since the current can be measured only by bringing the non-contact ammeter close to the electric circuit, the space and electric circuit for forming a magnetic closed circuit around the electric circuit like a conventional current measuring device can be obtained. The current can be easily measured without being affected by the thickness, the working voltage and the like.
【図１】本発明の概略図FIG. 1 is a schematic diagram of the present invention.
【図２】本発明の回路図FIG. 2 is a circuit diagram of the present invention.
【数１】本発明の演算根拠[Equation 1] Calculation basis of the present invention
１ 電路 ２ 磁気センサ１ ３ 磁気センサ２ ４ 演算回路 ５ メータ ６ 増幅回路１ ７ 増幅回路２ ８ 乗算回路 ９ 減算回路 １０ 除算回路 DESCRIPTION OF SYMBOLS 1 Electric circuit 2 Magnetic sensor 1 3 Magnetic sensor 2 4 Arithmetic circuit 5 Meter 6 Amplification circuit 17 Amplification circuit 2 8 Multiplication circuit 9 Subtraction circuit 10 Division circuit
─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成１２年８月９日（２０００．８．９）[Submission date] August 9, 2000 (200.8.9)
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００５[Correction target item name] 0005
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【0005】[0005]
【発明実施の形態】 以下、本発明の実施の形態を説
明する。図１の電路（１）に流れる電流 ｉに電路
（１）から距離ｘ点の磁束密度と電路からの距離ｘ＋ｌ
点の磁束密度は比例する。磁気センサ１（２）の出力
ｖａ 、磁気センサ２（３）の出力ｖｂ、透磁率μ、円周
率π、比例定数ｋとすると、下記の数式１及び数式２に
より数式３が導かれ電流ｉを距離ｘに無関係に求めるこ
とが出来る。Embodiments of the present invention will be described below.
I will tell. Current flowing in the electric circuit (1) in FIG.
The magnetic flux density at a point x distance from (1) and the distance x from the electric circuit+l
The magnetic flux density at a point is proportional. Output of magnetic sensor 1 (2)
va Output of the magnetic sensor 2 (3)b, Permeability μ, circumference
Assuming that the ratio is π and the proportionality constant is k,
Equation 3 is derived from Equation 3 to find the current i irrespective of the distance x.
Can be.
【数１】 (Equation 1)
【数２】 (Equation 2)
【数３】 この特性を利用した下記構造の電流測定器を発明した。
図１において、一定の間隔を空けて磁気センサ１
（２）、磁気センサ２（３）の磁気検出部を設け、それ
ぞれの出力を演算をする演算回路（４）で処理して出力
をメータ（５）で電流の大きさとして指示する。演算回
路（４）内部の回路は図２において イ、磁気センサ１（２）の出力と磁気センサ２（３）の
出力を、それぞれ増幅回路１（６）と増幅回路２（７）
で増幅する。 ロ、増幅回路１（６）と増幅回路２（７）の出力を乗算
回路（８）に入力し乗算する。 ハ、増幅回路１（６）の出力から減算回路（９）を使用
し、増幅回路２（７）の出力を減算する。 ニ、乗算回路（８）の出力を除算回路（１０）を使用
し、減算回路（９）の出力で除算する。 ホ、除算回路（１０）の出力を電流目盛のついたメータ
（５）に入力する。本発明は以上により成り立って、こ
のような構造を持った非接触型電流計を電路に近づけて
電路内の電流を測定する。(Equation 3) A current measuring device having the following structure utilizing this characteristic was invented.
In FIG. 1, a magnetic sensor 1 is provided at a certain interval.
(2) A magnetic detection unit of the magnetic sensor 2 (3) is provided, and each output is processed by an arithmetic circuit (4) for calculating the output, and the output is indicated by the meter (5) as the magnitude of the current. The circuit inside the arithmetic circuit (4) is shown in FIG. 2A. The output of the magnetic sensor 1 (2) and the output of the magnetic sensor 2 (3) are
Amplify with (B) The outputs of the amplifier circuits 1 (6) and 2 (7) are input to the multiplier circuit (8) and multiplied. (C) subtracting the output of the amplification circuit 2 (7) from the output of the amplification circuit 1 (6) using the subtraction circuit (9); D. The output of the multiplication circuit (8) is divided by the output of the subtraction circuit (9) using the division circuit (10). E. The output of the division circuit (10) is input to the meter (5) provided with a current scale. According to the present invention, a non-contact type ammeter having such a structure is brought close to an electric circuit to measure a current in the electric circuit.
【手続補正２】[Procedure amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】図面の簡単な説明[Correction target item name] Brief description of drawings
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明の概略図FIG. 1 is a schematic diagram of the present invention.
【図２】本発明演算回路の説明図FIG. 2 is an explanatory diagram of an arithmetic circuit of the present invention.
【符号の説明】 １ 電路 ２ 磁気センサ１ ３ 磁気センサ２ ４ 演算回路 ５ メータ ６ 増幅回路１ ７ 増幅回路２ ８ 乗算回路 ９ 減算回路 １０ 除算回路[Description of Signs] 1 Electric circuit 2 Magnetic sensor 1 3 Magnetic sensor 2 4 Operation circuit 5 Meter 6 Amplification circuit 1 7 Amplification circuit 2 8 Multiplication circuit 9 Subtraction circuit 10 Division circuit
【手続補正３】[Procedure amendment 3]
【補正対象書類名】図面[Document name to be amended] Drawing
【補正対象項目名】全図[Correction target item name] All figures
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【図１】 FIG.
【図２】 FIG. 2
Claims (1)
の磁界を、一定の間隔を持った２個の磁気センサーの出
力を演算する事により、電路の電流を測定する測定器1. A measuring instrument for measuring a current in a circuit by calculating a magnetic field generated around a circuit by a current flowing through the circuit and calculating outputs of two magnetic sensors having a predetermined interval.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000183735A JP2001324518A (en) | 2000-05-16 | 2000-05-16 | Noncontact type ammeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000183735A JP2001324518A (en) | 2000-05-16 | 2000-05-16 | Noncontact type ammeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001324518A true JP2001324518A (en) | 2001-11-22 |
Family
ID=18684271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000183735A Pending JP2001324518A (en) | 2000-05-16 | 2000-05-16 | Noncontact type ammeter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001324518A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011128092A (en) * | 2009-12-21 | 2011-06-30 | Japan Ae Power Systems Corp | Single-phase optical current transformer |
| JP2011164019A (en) * | 2010-02-12 | 2011-08-25 | Alps Green Devices Co Ltd | Current measuring device |
| JP2012026727A (en) * | 2010-07-19 | 2012-02-09 | Denso Corp | Current sensor |
| US20120229134A1 (en) * | 2011-03-11 | 2012-09-13 | Aisin Aw Co., Ltd. | Current detection device |
| US8494793B2 (en) | 2008-05-07 | 2013-07-23 | Commissariat à l'énergie atomique et aux énergies alternatives | Structure of a magnetic-field gradient sensor and process for fabricating it in integrated technology |
| WO2013145928A1 (en) * | 2012-03-30 | 2013-10-03 | 株式会社日立製作所 | Current detection apparatus and current detection method |
| WO2017212694A1 (en) * | 2016-06-06 | 2017-12-14 | アルプス電気株式会社 | Magnetic detection device |
-
2000
- 2000-05-16 JP JP2000183735A patent/JP2001324518A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8494793B2 (en) | 2008-05-07 | 2013-07-23 | Commissariat à l'énergie atomique et aux énergies alternatives | Structure of a magnetic-field gradient sensor and process for fabricating it in integrated technology |
| WO2011078096A1 (en) * | 2009-12-21 | 2011-06-30 | 株式会社日本Ａｅパワーシステムズ | Single-phase optical current transformer |
| JP2011128092A (en) * | 2009-12-21 | 2011-06-30 | Japan Ae Power Systems Corp | Single-phase optical current transformer |
| CN102933972B (en) * | 2009-12-21 | 2015-11-25 | 株式会社日立制作所 | single-phase optical current transformer |
| US8933686B2 (en) | 2009-12-21 | 2015-01-13 | Hitachi, Ltd. | Single-phase optical current transformer |
| CN102933972A (en) * | 2009-12-21 | 2013-02-13 | 株式会社日立制作所 | Single-phase optical current transformer |
| JP2011164019A (en) * | 2010-02-12 | 2011-08-25 | Alps Green Devices Co Ltd | Current measuring device |
| JP2012026727A (en) * | 2010-07-19 | 2012-02-09 | Denso Corp | Current sensor |
| WO2012124417A1 (en) * | 2011-03-11 | 2012-09-20 | アイシン・エィ・ダブリュ株式会社 | Current detection device |
| US20120229134A1 (en) * | 2011-03-11 | 2012-09-13 | Aisin Aw Co., Ltd. | Current detection device |
| WO2013145928A1 (en) * | 2012-03-30 | 2013-10-03 | 株式会社日立製作所 | Current detection apparatus and current detection method |
| JP2013210216A (en) * | 2012-03-30 | 2013-10-10 | Hitachi Ltd | Current detection device and current detection method |
| WO2017212694A1 (en) * | 2016-06-06 | 2017-12-14 | アルプス電気株式会社 | Magnetic detection device |
| JPWO2017212694A1 (en) * | 2016-06-06 | 2019-03-28 | アルプスアルパイン株式会社 | Magnetic detector |
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