JPS6365388A - Magnetic measuring instrument - Google Patents
Magnetic measuring instrumentInfo
- Publication number
- JPS6365388A JPS6365388A JP21034286A JP21034286A JPS6365388A JP S6365388 A JPS6365388 A JP S6365388A JP 21034286 A JP21034286 A JP 21034286A JP 21034286 A JP21034286 A JP 21034286A JP S6365388 A JPS6365388 A JP S6365388A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- difference
- sensors
- signal
- measuring instrument
- 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
- 238000001514 detection method Methods 0.000 claims abstract description 33
- 230000005389 magnetism Effects 0.000 claims description 12
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000005284 excitation Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Measuring Magnetic Variables (AREA)
Abstract
Description
【発明の詳細な説明】 （イ）産業上の利用分野 この発明は、差動型の高感度な磁気測定器に関する。[Detailed description of the invention] (b) Industrial application field The present invention relates to a differential type highly sensitive magnetic measuring instrument.
（ロ）従来の技術
一般に、所定の場所における磁気を測定するのに、フラ
ックスゲート型磁気測定器が使用される。(b) Prior Art Generally, a fluxgate magnetometer is used to measure magnetism at a predetermined location.
この種の磁気測定器に使用されるフラックスゲートは、
同一軸方向に配置される１対の検知コイルの出力を差動
的に導出するものであり、検出部は、いわゆる−軸のみ
であった。The fluxgate used in this type of magnetic measuring instrument is
The outputs of a pair of detection coils arranged in the same axial direction are differentially derived, and the detection section is only for the so-called - axis.
（ハ）発明が解決しようとする問題点
上記従来の磁気測定器は、検出部が１軸であるために、
得られる情報量が少ないばかりでなく、感度も余り得ら
れないという問題があった。(c) Problems to be solved by the invention Since the above-mentioned conventional magnetic measuring instrument has a single-axis detection unit,
There was a problem in that not only the amount of information obtained was small, but also the sensitivity was not very good.
この発明は、上記に鑑み、出力される情報量が多く、し
かも高感度な磁気測定器を提供することを目的としてい
る。In view of the above, an object of the present invention is to provide a magnetic measuring instrument that outputs a large amount of information and is highly sensitive.
（ニ）問題点を解決するための手段及び作用この発明の
磁気測定器は、上記目的を達成するために、
＊それぞれがＸ軸方向の磁気を測定する第１の検出部と
ｙ軸方向の磁気を検出する第２の検出部からなる２個の
磁気センサ。(d) Means and operation for solving the problems In order to achieve the above object, the magnetism measuring instrument of the present invention has: *a first detection section that measures magnetism in the X-axis direction and a first detection section that measures magnetism in the Y-axis direction; Two magnetic sensors consisting of a second detection section that detects magnetism.
＊２個の磁気センサを同一平面内に所定距離をおいて配
置するための支持部。*A support part for arranging two magnetic sensors at a predetermined distance in the same plane.
＊２個の磁気センサの第１検出部出力の差及び２個の磁
気センサの第２検出部出力の差を演算する演算手段
とから構成されている。*Comprised of a calculation means for calculating the difference between the first detection section outputs of the two magnetic sensors and the difference between the second detection section outputs of the two magnetic sensors.
この磁気測定器では、２個の磁気センサの第１検出部、
第２検出部の各出力及び２個の磁気センサの第１検出部
出力の差、２個の磁気センサの第２検出部出力の差、差
の合成値、磁気の方向等の多くの情報が得られる。また
、第１検出部の差出力と第２検出部の差出力の合成値が
検出出力として得られるので、１軸のみの場合に比し、
感度が良くなる。In this magnetic measuring instrument, a first detection part of two magnetic sensors,
A lot of information such as the difference between each output of the second detection section and the output of the first detection section of the two magnetic sensors, the difference between the outputs of the second detection section of the two magnetic sensors, the composite value of the differences, the direction of magnetism, etc. can get. In addition, since the composite value of the difference output of the first detection section and the difference output of the second detection section is obtained as the detection output, compared to the case of only one axis,
Sensitivity improves.
（ホ）実施例
以下、実施例により、この発明をさらに詳細に説明する
。(E) Examples The present invention will be explained in more detail with reference to Examples below.
第１図は、この発明の一実施例を示す磁気測定器の概略
図である。この磁気測定器は、制御器（本体部）１とセ
ンサ部２とから構成されている。FIG. 1 is a schematic diagram of a magnetic measuring instrument showing an embodiment of the present invention. This magnetic measuring instrument is composed of a controller (main body part) 1 and a sensor part 2.
センサ部２は、２個の磁気センサ３．４が支持板５に、
一定の距離離して同一平面、同一姿勢で配置されて構成
されている。磁気センサ３．４は、リード線６．７によ
り、制御器１に接続されている。磁気センサ３．４は、
いずれも直交する２軸、つまりＸ軸、ｙ軸の磁気を検出
し得るフラックスゲート型であり、具体的には、第２図
に示すように、鉄心８に直交するコイル９．１０が巻回
されている。なお、１１は励振コイルである。In the sensor section 2, two magnetic sensors 3.4 are mounted on a support plate 5,
They are arranged a certain distance apart on the same plane and in the same attitude. The magnetic sensor 3.4 is connected to the controller 1 by a lead wire 6.7. The magnetic sensor 3.4 is
Both are flux gate types that can detect magnetism in two orthogonal axes, that is, the X-axis and the y-axis. Specifically, as shown in FIG. has been done. Note that 11 is an excitation coil.
第３図に、制御器１の内部回路を示している。FIG. 3 shows the internal circuit of the controller 1.
同図において、励振回路２１より磁気センサ３．４に励
振信号が与えられ、磁気センサ３．４が駆動されるよう
になっている。磁気センサ３のＸ軸信号（Ｈａｘ）、Ｘ
軸信号（Ｈａｙ）及び磁気センサ４のＸ軸信号（）（ｂ
ｘ）、Ｘ軸信号（Ｈｂｙ）は、受信回路２２．２３．
２４．２５で受信されて、演算回路部２６に加えられて
いる。演算回路部２６では、磁気センサ３のＸ軸信号と
磁気センサ４のＸ軸信号の差及び磁気センサ３のｙ軸信
Σと磁気センサ４のＸ軸信号の差を求め、さらに両差値
より、検出信号の大きさ及び方向角を算出し、表示器２
７で表示すると共に、出力信号としている。In the figure, an excitation signal is applied to the magnetic sensor 3.4 from the excitation circuit 21, and the magnetic sensor 3.4 is driven. X-axis signal (Hax) of magnetic sensor 3,
Axis signal (Hay) and X-axis signal of magnetic sensor 4 () (b
x), the X-axis signal (Hby) is sent to the receiving circuits 22, 23.
It is received at 24.25 and added to the arithmetic circuit unit 26. The arithmetic circuit unit 26 calculates the difference between the X-axis signal of the magnetic sensor 3 and the X-axis signal of the magnetic sensor 4, and the difference between the y-axis signal Σ of the magnetic sensor 3 and the X-axis signal of the magnetic sensor 4, and further calculates the difference between the two difference values. , calculates the magnitude and direction angle of the detection signal, and displays it on the display 2.
7 and is also used as an output signal.
上記実施例磁気測定器において、今、磁気センサ３のＸ
軸方向で検出した磁界の大きさをＨａｘ、ｙ軸方向で検
出される磁界の大きさをＭａｙとすると、磁気センサ３
で検出される磁界ベクトルＨａは、
となる。同様に、磁気センサ４のＸ軸方向で検出した磁
界の大きさをＨｂｘ、ｙ軸方向で検出される磁界の大き
さをｕｂｙとすると、磁気センサ４で検出される磁界ベ
クトルＨｉは、
となる。In the magnetometer of the above embodiment, now the X of the magnetic sensor 3 is
If the magnitude of the magnetic field detected in the axial direction is Hax, and the magnitude of the magnetic field detected in the y-axis direction is May, then the magnetic sensor 3
The magnetic field vector Ha detected at is as follows. Similarly, if the magnitude of the magnetic field detected in the X-axis direction of the magnetic sensor 4 is Hbx, and the magnitude of the magnetic field detected in the Y-axis direction is uby, then the magnetic field vector Hi detected by the magnetic sensor 4 is as follows. .
逆に、磁気センサ４に加えられる磁界ベクトルがＨａ、
Ｈｂであると、磁気センサ３及び４でそれぞれＨａｘ
、Ｍａｙ、）ｌｂｘ、Ｈｔ）’が検出され、これが受信
回路２２〜２５で受信されて、演算回路部２６に入力さ
れる。Conversely, the magnetic field vector applied to the magnetic sensor 4 is Ha,
Hb, magnetic sensors 3 and 4 each have Hax
, May, )lbx, Ht)' are detected, received by the receiving circuits 22 to 25, and input to the arithmetic circuit section 26.
演算回路部２６では、先ず、磁気センサ３．４のＸ軸方
向の検出出力の差Ｈａｘ−Ｈｂｘを算出する。次に、磁
気センサ３．４のｙ軸方向の検出出力の差Ｈａｙ−Ｈｂ
ｙを算出する。さらに、１８１−Ｈｍ １
Ｈａｘ−Ｈｂｘ
を求め、両磁気センサ３．４により、Ｘ軸、ｙ軸の２軸
を含む磁気の大きさＩＨＡ−Ｈ，ｌ及び方向角θを得る
（第４図参照）。この検出磁気の大きさ及び方向角は、
表示部２７で表示される。これら検出磁気の大きさ及び
方向角は、外部に導出されてもよい。The arithmetic circuit section 26 first calculates the difference Hax-Hbx between the detection outputs of the magnetic sensor 3.4 in the X-axis direction. Next, the difference between the detection outputs of the magnetic sensor 3.4 in the y-axis direction Hay−Hb
Calculate y. Furthermore, 181-Hm 1 Hax-Hbx is determined, and the magnetic magnitude IHA-H,l including the two axes, the X-axis and the y-axis, and the direction angle θ are obtained using both magnetic sensors 3.4 (see Figure 4). ). The magnitude and direction angle of this detected magnetism are
It is displayed on the display section 27. The magnitude and direction angle of these detected magnetisms may be derived to the outside.
（へ）発明の効果
この発明によれば、１個に直交する２軸の磁気を検出す
る第１、第２の検出部を有する磁気センサを２個備え、
この２個の磁気センサを同一平面内に所定距離をおいて
支持部に配置し、２個の磁気センサの第１の検出部出力
の差及び第２の検出部出力の差を演算する手段を備える
ものであるから、これらの差を合成すれば、例えば従来
のように、Ｘ軸方向の１軸のみの検出部を有する磁気セ
ンサを２個配置し、差出力を得る場合は、その出力は（
Ｈａｘ−Ｈｂｘ）＝ΔＸ（第４図参照）であるのに対し
、その差出力は、
となり、感度が向上する。(F) Effects of the Invention According to the present invention, two magnetic sensors each having a first and a second detection section that detect magnetism in two axes orthogonal to each other are provided,
These two magnetic sensors are arranged on the support part at a predetermined distance in the same plane, and means for calculating the difference between the outputs of the first detection section and the difference between the outputs of the second detection section of the two magnetic sensors is provided. Therefore, if these differences are combined, for example, if two magnetic sensors each having a detection section for only one axis in the X-axis direction are arranged and a differential output is obtained, the output will be (
Hax−Hbx)=ΔX (see FIG. 4), the difference output is as follows, and the sensitivity is improved.
Ｈａｘ−Ｈｂｘ より、磁界の方向も検出することができる。Hax-Hbx Therefore, the direction of the magnetic field can also be detected.
第１図は、この発明の一実施例を示す磁気測定器の概略
図、第２図は、同磁気測定器を構成する磁気センサの具
体例を示す図、第３図は、同実施例磁気測定器の制御器
の回路構成を示すブロック図、第４図は、同実施例測定
器の検出動作を説明するのに供するベクトル図である。
３・４：磁気センサ、 ５：支持板、９：ｘ軸検出
コイル（第１の検出部）、１０：ｙ軸検出コイル（第２
の検出部）、２６：演算回路部。FIG. 1 is a schematic diagram of a magnetic measuring instrument showing an embodiment of the present invention, FIG. 2 is a diagram showing a specific example of a magnetic sensor constituting the magnetic measuring instrument, and FIG. FIG. 4, a block diagram showing the circuit configuration of the controller of the measuring instrument, is a vector diagram used to explain the detection operation of the measuring instrument of the same embodiment. 3 and 4: magnetic sensor, 5: support plate, 9: x-axis detection coil (first detection part), 10: y-axis detection coil (second
(detection section), 26: Arithmetic circuit section.
Claims (1)
部と、前記軸方向に直交する軸方向の磁気を検出する第
２の検出部からなる２個の磁気センサを備え、これら２
個の磁気センサを同一平面内に所定距離をおいて支持部
に配置し、２個の磁気センサの第１検出部出力の差及び
２個の磁気センサの第２検出部出力の差を演算する手段
を備えた磁気検出器。(1) Each includes two magnetic sensors, each consisting of a first detection section that detects magnetism in one axial direction and a second detection section that detects magnetism in an axial direction perpendicular to the axial direction, and these two
A number of magnetic sensors are placed on the support part at a predetermined distance in the same plane, and the difference between the outputs of the first detection section of the two magnetic sensors and the difference between the outputs of the second detection section of the two magnetic sensors are calculated. Magnetic detector with means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21034286A JPS6365388A (en) | 1986-09-05 | 1986-09-05 | Magnetic measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21034286A JPS6365388A (en) | 1986-09-05 | 1986-09-05 | Magnetic measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6365388A true JPS6365388A (en) | 1988-03-23 |
Family
ID=16587818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21034286A Pending JPS6365388A (en) | 1986-09-05 | 1986-09-05 | Magnetic measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6365388A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5565165A (en) * | 1978-11-10 | 1980-05-16 | Mitsubishi Electric Corp | Angle sensor |
| JPS61108981A (en) * | 1984-10-31 | 1986-05-27 | Shimadzu Corp | Uniaxial differential type magnetism measuring instrument |
-
1986
- 1986-09-05 JP JP21034286A patent/JPS6365388A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5565165A (en) * | 1978-11-10 | 1980-05-16 | Mitsubishi Electric Corp | Angle sensor |
| JPS61108981A (en) * | 1984-10-31 | 1986-05-27 | Shimadzu Corp | Uniaxial differential type magnetism measuring instrument |
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