JPH0352833B2 - - Google Patents
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- Publication number
- JPH0352833B2 JPH0352833B2 JP58166745A JP16674583A JPH0352833B2 JP H0352833 B2 JPH0352833 B2 JP H0352833B2 JP 58166745 A JP58166745 A JP 58166745A JP 16674583 A JP16674583 A JP 16674583A JP H0352833 B2 JPH0352833 B2 JP H0352833B2
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- Japan
- Prior art keywords
- magnetic field
- magnetic
- coil
- coils
- detection
- Prior art date
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/0206—Three-component magnetometers
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Measuring Magnetic Variables (AREA)
Description
【発明の詳細な説明】
本発明は簡単な操作で高精度な測定が可能な磁
界測定装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic field measuring device that can perform highly accurate measurements with simple operation.
従来より用いられている磁界測定装置として
は、磁気感応儀、プロトン磁力計、フラツクスゲ
ート磁力計等があるが、磁気感応儀においては各
種誤差を除去するための反復測定が必要であつた
り、またプロトン磁力計では励磁のためにかなり
の電力を必要とするほか、完全な連続測定でな
く、磁場が均一でない場合には全部のプロトンが
同一位相で動かなくなるため信号が出なくなり、
更にまたフラツクスゲート磁力計では水平および
鉛直分力の測定の際に直流を補償コイルに流して
平均的水平および鉛直分力を打ち消さねばならな
いが、このような打ち消し磁場を長期にわたつて
１（γ）以内の精度で維持することは困難である
等、取扱いが複雑で精度の高い測定が困難という
欠点があつた。 Conventionally used magnetic field measuring devices include magnetic field measuring instruments, proton magnetometers, flux gate magnetometers, etc. However, magnetic field measuring instruments require repeated measurements to eliminate various errors. In addition, proton magnetometers require a considerable amount of power for excitation, and are not completely continuous measurements.If the magnetic field is not uniform, all protons stop moving in the same phase and no signal is output.
Furthermore, in fluxgate magnetometers, when measuring horizontal and vertical force components, direct current must be passed through a compensation coil to cancel out the average horizontal and vertical force components. The disadvantages are that it is difficult to maintain an accuracy within γ), making it difficult to handle and make highly accurate measurements.
本発明は上記従来の欠点を除去し、操作が簡単
で高精度の測定をなし得る磁界測定装置を実現す
ることを目的としたもので、その要旨とするとこ
ろは外部磁界の印加により電気機械結合係数が漸
次増大し、所定の外部磁界が加わつた時に該電気
機械結合係数が最大値となる磁性素子を３個、互
いに直交する３方向に配置し、該３個の磁性素子
のそれぞれの一端及び他端に第１及び第２のコイ
ルを配設し、さらに上記３個の磁性素子のそれぞ
れの第１及び第２のコイルの配設部位に第３及び
第４のコイルを配設した磁界検出部と、上記各磁
性素子に対応する第１のコイルに磁性素子を共振
させる交流信号を加える手段と、上記各磁性素子
に対応する第３のコイルに上記所定の外部磁界を
発生させる直流電流を加える手段と、上記各磁性
素子に対応する第４のコイルに信号電流を大きさ
及び極性を順次変えながら加える手段と、上記各
磁性素子に対応する第２のコイルに発生する検出
信号の電圧値を検出する手段と、上記検出信号の
電圧値が極小となつた時の上記信号電流の大きさ
及び極性からその磁性素子の方向の磁界強さと磁
界の向きを測定する手段と、上記３方向の磁界強
さと磁界の向きとから外部磁界の強さ、方向等を
測定する手段とからなる磁界測定装置にある。以
下、図面について詳細に説明する。 The present invention aims to eliminate the above-mentioned conventional drawbacks and realize a magnetic field measuring device that is easy to operate and can perform high-precision measurements. Three magnetic elements whose coefficients gradually increase and whose electromechanical coupling coefficient reaches a maximum value when a predetermined external magnetic field is applied are arranged in three directions orthogonal to each other, and one end of each of the three magnetic elements and Magnetic field detection in which first and second coils are disposed at the other end, and third and fourth coils are disposed at the locations where the first and second coils of each of the three magnetic elements are disposed. a means for applying an alternating current signal to a first coil corresponding to each of the magnetic elements to cause the magnetic elements to resonate; and a means for applying a direct current to a third coil corresponding to each of the magnetic elements to generate the predetermined external magnetic field. means for applying a signal current to a fourth coil corresponding to each of the magnetic elements, means for applying a signal current while sequentially changing the magnitude and polarity, and a voltage value of a detection signal generated in a second coil corresponding to each of the magnetic elements. means for detecting the magnetic field strength and direction of the magnetic element from the magnitude and polarity of the signal current when the voltage value of the detection signal becomes minimum; The present invention relates to a magnetic field measuring device comprising means for measuring the strength, direction, etc. of an external magnetic field from the magnetic field strength and the direction of the magnetic field. The drawings will be described in detail below.
まず、本発明の磁界測定装置の基本原理を第１
図及び第２図について説明する。 First, the basic principle of the magnetic field measuring device of the present invention will be explained in the first section.
The figure and FIG. 2 will be explained.
図中、１は磁性素子であり、特に外部磁界の印
加により電気機械結合係数が漸次増大し、所定の
外部磁界が加わつた時に該電気機械結合係数が最
大値となるもの、例えばアモルフアス合金のリボ
ンである。ここで、電気機械結合係数とは、磁界
及び磁化の微小変化により磁気的に与えられたエ
ネルギーのうち、弾性エネルギーに変換されて材
料内に蓄えられるエネルギーの割合、あるいは応
力及び歪みの微小変化により弾性的に与えられた
エネルギーのうち、磁気的エネルギーに変換され
て材料内に蓄えられるエネルギーの割合を示すも
のである。また、該電気機械結合係数の値は材料
によつて異なるとともに該材料に加わる外部磁界
の大きさによつて変化する。例えば、上述したリ
ボン１では外部磁界がない状態ではほとんど０か
又は小さな値であるが、外部磁界が加わると当初
は外部磁界の増加に伴つて増大し、所定の外部磁
界が加わつた時に最大値となり、その後、さらに
外部磁界が増加すると減少する。なお、電気機械
結合係数の詳細については、例えば「Ｒ＆Ｄレポ
ートNo.34 応用開発進むアモルフアス金属材料」
（株式会社シーエムシー、昭和57年11月16日発行、
P96〜99）等に記載されている。 In the figure, 1 is a magnetic element, in particular, an element whose electromechanical coupling coefficient gradually increases with the application of an external magnetic field, and whose electromechanical coupling coefficient reaches its maximum value when a predetermined external magnetic field is applied, such as a ribbon of amorphous alloy. It is. Here, the electromechanical coupling coefficient is the proportion of energy that is converted into elastic energy and stored in the material, out of the energy given magnetically by magnetic fields and minute changes in magnetization, or by minute changes in stress and strain. It shows the proportion of energy that is converted into magnetic energy and stored within the material, out of the energy given elastically. Further, the value of the electromechanical coupling coefficient differs depending on the material and changes depending on the magnitude of the external magnetic field applied to the material. For example, in the ribbon 1 described above, the value is almost 0 or small in the absence of an external magnetic field, but when an external magnetic field is applied, it initially increases as the external magnetic field increases, and reaches its maximum value when a predetermined external magnetic field is applied. and then decreases as the external magnetic field increases further. For details on the electromechanical coupling coefficient, see, for example, "R&D Report No. 34 Amorphous Metal Materials with Progress in Applied Development"
(CMC Co., Ltd., published on November 16, 1982,
P96-99) etc.
また、２はリボン１を共振させる交流電流を加
えるための第１のコイル（以下、励振コイルと称
す。）、３は検出信号を取出すための第２のコイル
（以下、検出コイルと称す。）、４はリボン１の励
振コイル２の配設部位に上述した所定の外部（バ
イアス）磁界を与えるための第３のコイル（以
下、励振バイアスコイルと称す。）、５はリボン１
の検出コイル３の配設部位に外部（バイアス）磁
界を後述する如くその強さ及び向きを順次変えな
がら与えるための第４のコイル（以下、検出バイ
アスコイルと称す。）である。 Further, 2 is a first coil (hereinafter referred to as an excitation coil) for applying an alternating current that makes the ribbon 1 resonate, and 3 is a second coil for extracting a detection signal (hereinafter referred to as a detection coil). , 4 is a third coil (hereinafter referred to as an excitation bias coil) for applying the above-mentioned predetermined external (bias) magnetic field to the location of the excitation coil 2 of the ribbon 1; 5 is the ribbon 1;
This is a fourth coil (hereinafter referred to as a detection bias coil) for applying an external (bias) magnetic field to the disposed portion of the detection coil 3 while sequentially changing its strength and direction as described later.
上記リボン１はその中央付近にて略直角に折り
曲げられ、その一辺１ａは略鉛直に、また、他辺
１ｂは検出すべき磁界の方向Ａに向けて配置され
る。また、該一辺１ａの周りには励振コイル２及
び励振バイアスコイル４が配設され、他辺１ｂの
周りには検出コイル３及び検出バイアスコイル５
が配設されている。 The ribbon 1 is bent approximately at right angles near its center, with one side 1a being approximately vertical and the other side 1b facing the direction A of the magnetic field to be detected. Further, an excitation coil 2 and an excitation bias coil 4 are arranged around one side 1a, and a detection coil 3 and a detection bias coil 5 are arranged around the other side 1b.
is installed.
上記励振バイアスコイル４には一定の直流電流
が流され、リボン１の励振コイル２の配設部位に
所定のバイアス磁界が加えられるが、その強さ及
び向きはリボン１の電気機械結合係数がほぼ最大
となるように設定される。なお、ここでリボン１
の電気機械結合係数がほぼ最大となるバイアス磁
界を与えるのは、後述する励振コイル２によるリ
ボン１の励振が最も効率良くなされるようにする
ためである。 A constant DC current is passed through the excitation bias coil 4, and a predetermined bias magnetic field is applied to the region of the ribbon 1 where the excitation coil 2 is disposed. is set to the maximum. In addition, here ribbon 1
The reason why the bias magnetic field is applied so that the electromechanical coupling coefficient of is approximately maximized is to enable the ribbon 1 to be excited most efficiently by the excitation coil 2, which will be described later.
而して、励振コイル２に交流の入力電流を流す
と、該励振コイル２に交流磁界が発生するが、こ
の交流磁界による磁気エネルギーはリボン１にて
振動（弾性）エネルギーに変換され、該リボン１
は振動状態となる。一方、振動状態のリボン１に
おける振動エネルギーは該リボン１にて磁気エネ
ルギーに変換され、その周囲に交流磁界を発生さ
せるため、検出コイル３には交流の出力電圧が発
生する。 When an alternating current input current is applied to the excitation coil 2, an alternating magnetic field is generated in the excitation coil 2, and the magnetic energy due to this alternating magnetic field is converted into vibration (elastic) energy in the ribbon 1. 1
becomes an oscillating state. On the other hand, the vibrational energy in the vibrating ribbon 1 is converted into magnetic energy in the ribbon 1, and an alternating current magnetic field is generated around the ribbon 1, so that an alternating current output voltage is generated in the detection coil 3.
この際、入力電流として第２図に示す特定周波
数の入力電流６を励振コイル２に流すと、リボン
１は共振状態となり、検出コイル３には同一周波
数の大きな出力電圧７（厳密には他の周波数の電
圧も発生するが、ここでは考えない。）が発生す
る。 At this time, when an input current 6 with a specific frequency shown in FIG. A voltage with a certain frequency is also generated, but we will not consider it here.) is generated.
ところで、上記出力電圧７の電流値や位相はリ
ボン１の他辺１ｂの方向Ａに存在する磁界の強さ
や磁束の向きによつて異なる。 Incidentally, the current value and phase of the output voltage 7 differ depending on the strength of the magnetic field existing in the direction A of the other side 1b of the ribbon 1 and the direction of the magnetic flux.
ここで存在する磁界として地磁気について考え
ると、リボン１の他辺１ｂが北を向いている場合
は磁界の強さが最も大きいため、その出力電圧７
は最大値を示す。次に一辺１ａを中心として他辺
１ｂを回転させ東に向かわせると磁界の強さが弱
まるため、電圧値は小さくなり（出力電圧７′）、
ちようど東で最小値をとる。それから更に回転さ
せて少しでも南に向けると磁界の向きが逆転する
ため、位相が180度変化し（出力電圧７″）、南に
近づくに従つて磁界の強さが増し、その電圧値が
大きくなる（出力電圧７）。 Considering the earth's magnetism as the magnetic field that exists here, when the other side 1b of the ribbon 1 faces north, the strength of the magnetic field is greatest, so the output voltage 7
indicates the maximum value. Next, when the other side 1b is rotated around one side 1a to face east, the strength of the magnetic field weakens, so the voltage value becomes smaller (output voltage 7'),
The minimum value is just east. Then, if you rotate it further and point it even slightly south, the direction of the magnetic field will reverse, so the phase will change 180 degrees (output voltage 7"), and as you get closer to the south, the strength of the magnetic field will increase, and the voltage value will increase. (output voltage 7).
一方、上記検出バイアスコイル５に電流を流す
と他辺１ｂ方向にバイアス磁界が発生するが、該
電流の大きさ、極性を順次変えていくと、方向Ａ
の磁界と打ち消し合つて検出コイル３の出力電圧
値が最小値をとる場合が生ずる。従つて、この時
の検出バイアスコイル５に流した電流の値と極性
より方向Ａの磁界の強さと磁束の向きを判定する
ことが可能となる。 On the other hand, when a current is passed through the detection bias coil 5, a bias magnetic field is generated in the direction of the other side 1b.
A case may occur in which the output voltage value of the detection coil 3 takes a minimum value as the magnetic field cancels out with the magnetic field. Therefore, it is possible to determine the strength of the magnetic field in the direction A and the direction of the magnetic flux from the value and polarity of the current flowing through the detection bias coil 5 at this time.
第３図乃至第６図は本発明の磁界測定装置の一
実施例を示すもので、図中１１，２１，３１はア
モルフアス合金のリボン、１２，２２，３２は励
振コイル、１３，２３，３３は検出コイル、１
４，２４，３４は励振バイアスコイル、１５，２
５，３５は検出バイアスコイル、４０，４１はマ
ルチプレクサ、４３は同期検波器、４４はローパ
スフイルタ（LPF）、４５はコンパレータ、４６
は信号発生器、４７は励振用磁気バイアス電流
源、４８はＤ−Ａ変換器、４９はマイクロプロセ
ツサである。 3 to 6 show an embodiment of the magnetic field measuring device of the present invention, in which 11, 21, and 31 are amorphous alloy ribbons, 12, 22, and 32 are excitation coils, and 13, 23, and 33 are ribbons of amorphous alloy. is the detection coil, 1
4, 24, 34 are excitation bias coils, 15, 2
5 and 35 are detection bias coils, 40 and 41 are multiplexers, 43 is a synchronous detector, 44 is a low pass filter (LPF), 45 is a comparator, and 46
47 is a magnetic bias current source for excitation, 48 is a DA converter, and 49 is a microprocessor.
上記リボン１１，２１，３１の一辺１１ａ，２
１ａ，３１ａには励振コイル１２，２２，３２及
び励振バイアスコイル１４，２４，３４がそれぞ
れ取付けられており、また他辺１１ｂ，２１ｂ，
３１ｂには検出コイル１３，２３，３３及び検出
バイアスコイル１５，２５，３５がそれぞれ取付
けられている。また他辺１１ｂ，２１ｂ，３１ｂ
は互いに直交するｘ，ｙ，ｚ軸方向にそれぞれ向
けて配置されている。 One side 11a, 2 of the ribbon 11, 21, 31
Excitation coils 12, 22, 32 and excitation bias coils 14, 24, 34 are attached to 1a, 31a, respectively, and the other sides 11b, 21b,
Detection coils 13, 23, 33 and detection bias coils 15, 25, 35 are attached to 31b, respectively. Also, the other sides 11b, 21b, 31b
are arranged in the directions of the x, y, and z axes, which are perpendicular to each other.
励振コイル１２，２２，３２には信号発生器４
６より特定周波数の交流信号が供給され、また励
振バイアスコイル１４，２４，３４には励振用磁
気バイアス電流源４７より所定の直流電流が供給
されており、リボン１１，２１，３１は共振状態
に保たれている。 The excitation coils 12, 22, 32 are equipped with a signal generator 4.
An AC signal of a specific frequency is supplied from the excitation bias coils 14, 24, and 34, and a predetermined DC current is supplied from an excitation magnetic bias current source 47, and the ribbons 11, 21, and 31 are in a resonant state. It is maintained.
次に動作について説明するが、ここではｚ軸を
鉛直に配置し、地磁気の全磁力と伏角を測定する
場合について述べる。 Next, the operation will be described. Here, we will describe the case where the z-axis is arranged vertically and the total magnetic force and inclination angle of the earth's magnetism are measured.
まずマイクロプロセツサ４９によりマルチプレ
クサ４０及び４１を介してｘ軸方向のコイル、即
ち検出コイル１３及び検出バイアスコイル１５が
選択され、Ｄ−Ａ変換器４８より検出バイアスコ
イル１５に絶対値、極性を変えた電流が順次入力
される。 First, the microprocessor 49 selects the coils in the x-axis direction, that is, the detection coil 13 and the detection bias coil 15 via the multiplexers 40 and 41, and changes the absolute value and polarity to the detection bias coil 15 by the DA converter 48. The currents are input sequentially.
一方、検出コイル１３からの電気信号よりビデ
オアンプ４２、同期検波器４３を経て信号発生器
４６の特定周波数と同一周波数の信号、即ち検出
信号が取出され、ローパスフイルタ４４にて平滑
化され、コンパレータ４５にて“０”レベルと比
較される。 On the other hand, a signal having the same frequency as the specific frequency of the signal generator 46, that is, a detection signal, is extracted from the electric signal from the detection coil 13 via a video amplifier 42 and a synchronous detector 43, and is smoothed by a low-pass filter 44, and then filtered by a comparator. It is compared with the "0" level at step 45.
上記検出バイアスコイル１５の発生するバイア
ス磁界により検出コイル１３からの電気信号の位
相が180度変化し、検出信号が“０”レベルを交
差すると、コンパレータ４５よりマイクロプロセ
ツサ４９にパルス信号が出され、この時の検出バ
イアスコイル１５へ流れた電流の値と極性が記憶
される。以下、ｙ軸及びｚ軸についても同様にし
て検出信号が“０”レベルを交差する時の検出バ
イアスコイル２５，３５に流れた電流の値及び極
性がマイクロプロセツサ４９に記憶される。 The bias magnetic field generated by the detection bias coil 15 changes the phase of the electric signal from the detection coil 13 by 180 degrees, and when the detection signal crosses the "0" level, a pulse signal is output from the comparator 45 to the microprocessor 49. , the value and polarity of the current flowing to the detection bias coil 15 at this time are stored. Thereafter, the values and polarities of the currents flowing through the detection bias coils 25 and 35 when the detection signals cross the "0" level are similarly stored in the microprocessor 49 for the y- and z-axes.
次にマイクロプロセツサ４９は上記ｘ，ｙ，ｚ
軸方向毎に記憶された電流の値より、予め定めら
れた変換係数に基づいてｘ，ｙ，ｚ軸方向の磁界
の強さを求め、更に電流の極性よりｘ，ｙ，ｚ軸
方向毎の磁束の向きを求める。 Next, the microprocessor 49 processes the above x, y, z
The magnetic field strength in the x, y, and z-axis directions is determined based on the predetermined conversion coefficients from the current value stored for each axis direction, and the strength of the magnetic field in each x, y, and z-axis direction is determined based on the current polarity. Find the direction of magnetic flux.
而して上記ｘ，ｙ，ｚ軸方向毎の磁界の強さと
磁束の向きより地磁気の真の磁界の強さと方向
（伏角）を、以下に示す演算より求める。即ち、
第６図において水平分力Ｈはｘ軸方向及びｙ軸方
向の磁界強さをそれぞれＸ，Ｙとすれば、
Ｈ＝√2＋2 ……(1)
となる。また真の磁界の強さ、即ち全磁力Ｆはｚ
軸方向の磁界強さをＺとすると、
Ｆ＝√2＋2 ……(2)
となる。また全磁力Ｆの水平分力Ｈに対する伏角
Ｉは
Ｉ＝tan-1F／Ｈ ……(3)
となる。また偏角Ｄを補正すれば真北の方向を判
定することもできる。また上記測定及び演算を複
数回繰り返してその平均値を求める如くなしても
よい。 Then, the true magnetic field strength and direction (inclination angle) of the earth's magnetism are determined from the magnetic field strength and magnetic flux direction in each of the x, y, and z-axis directions by the calculations shown below. That is,
In FIG. 6, the horizontal component H is expressed as H=√ 2 + 2 (1), where X and Y are the magnetic field strengths in the x-axis direction and the y-axis direction, respectively. Also, the true magnetic field strength, that is, the total magnetic force F, is z
If the magnetic field strength in the axial direction is Z, then F=√ 2 + 2 ...(2). Also, the inclination angle I with respect to the horizontal component H of the total magnetic force F is I=tan -1 F/H (3). Furthermore, by correcting the declination D, the direction of true north can also be determined. Alternatively, the above measurements and calculations may be repeated a plurality of times to obtain the average value.
第７図は本発明の他の実施例を示すものであ
る。図中、５０，５１，５２はアモルフアス合金
のリボン、５３，５４，５５，５６，５７，５８
はコイルであつて、上記リボン５０，５１，５２
はその中央付近にて直角に折り曲げられ、その一
辺５０ａ，５１ａ，５２ａはそれぞれｙ，ｚ，ｘ
軸方向に、また他辺５０ｂ，５１ｂ，５２ｂはそ
れぞれｘ，ｙ，ｚ軸方向に向けて配置されてい
る。またコイル５３，５６はリボン５０の他辺５
０ｂとリボン５２の一辺５２ａの周りに配設さ
れ、コイル５４，５７は他辺５１ｂと一辺５０ａ
の周りに、またコイル５５，５８は他辺５２ｂと
一辺５１ａの周りにそれぞれ配設されている。 FIG. 7 shows another embodiment of the invention. In the figure, 50, 51, 52 are amorphous alloy ribbons, 53, 54, 55, 56, 57, 58
is a coil, and the ribbons 50, 51, 52
is bent at a right angle near its center, and its sides 50a, 51a, and 52a are y, z, and x, respectively.
The other sides 50b, 51b, and 52b are arranged in the axial direction, and the other sides 50b, 51b, and 52b are arranged in the x, y, and z axis directions, respectively. The coils 53 and 56 are connected to the other side 5 of the ribbon 50.
0b and one side 52a of the ribbon 52, and the coils 54 and 57 are arranged around the other side 51b and one side 50a.
The coils 55 and 58 are arranged around the other side 52b and one side 51a, respectively.
上記構成において、検出コイル、検出バイアス
コイル、励振コイル、励振バイアスコイルとし
て、ｘ軸方向の磁界を測定する場合はコイル５
３，５６，５４，５７がそれぞれ選択され、また
ｙ軸の場合はコイル５４，５７，５５，５８がそ
れぞれ選択され、またｚ軸の場合はコイル５５，
５８，５３，５６がそれぞれ選択されて行なわれ
る。従つてコイル数を上記実施例に比べて半分に
削減でき、より構成を簡略化できる。なお、電気
回路部分については上記実施例のものに信号発生
器４６及び励振用磁気バイアス電流源４７の出力
を各コイル５３〜５８に選択的に加えるためのマ
ルチプレクサを付加するのみでよい。 In the above configuration, when measuring the magnetic field in the x-axis direction, coil 5 is used as the detection coil, detection bias coil, excitation coil, and excitation bias coil.
3, 56, 54, and 57 are selected respectively, and in the case of the y-axis, coils 54, 57, 55, and 58 are selected, respectively, and in the case of the z-axis, the coils 55,
58, 53, and 56 are selected and executed, respectively. Therefore, the number of coils can be reduced by half compared to the above embodiment, and the configuration can be further simplified. As for the electric circuit section, it is sufficient to add a multiplexer to the above embodiment for selectively applying the outputs of the signal generator 46 and excitation magnetic bias current source 47 to each of the coils 53 to 58.
これまでの説明では、地磁気の測定について述
べたが、これに限らず、あらゆる磁界の強さ、方
向を測定することができる。 In the explanation so far, the measurement of earth's magnetism has been described, but the present invention is not limited to this, and the strength and direction of any magnetic field can be measured.
以上説明したように本発明によれば、外部磁界
の印加により電気機械結合係数が漸次増大し、所
定の外部磁界が加わつた時に該電気機械結合係数
が最大値となる磁性素子を３個、互いに直交する
３方向に配置し、該３個の磁性素子のそれぞれの
一端及び他端に第１及び第２のコイルを配設し、
さらに上記３個の磁性素子のそれぞれの第１及び
第２のコイルの配設部位に第３及び第４のコイル
を配設した磁界検出部と、上記各磁性素子に対応
する第１のコイルに磁性素子を共振させる交流信
号を加える手段と、上記各磁性素子に対応する第
３のコイルに上記所定の外部磁界を発生させる直
流電流を加える手段と、上記各磁性素子に対応す
る第４のコイルに信号電流を大きさ及び極性を順
次変えながら加える手段と、上記各磁性素子に対
応する第２のコイルに発生する検出信号の電圧値
を検出する手段と、上記検出信号の電圧値が極小
となつた時の上記信号電流の大きさ及び極性から
その磁性素子の方向の磁界強さと磁界の向きを測
定する手段と、上記３方向の磁界強さと磁界の向
きとから外部磁界の強さ、方向等を測定する手段
とからなるため、可動部分が全くなく、従つて、
電源投入後、直ちに測定を開始できるとともに複
雑な操作や取扱いを必要とせず、あらゆる磁界の
強さ、方向等を高い精度で測定でき、また、磁界
検出部は他の部分と離隔して設置することがで
き、リモートセンシングが可能で、その間の距離
も自由に設定することができ、また、安価な磁性
素子や少数のコイル及び簡単な電気回路により構
成できるので、低価格且つ低消費電力となすこと
ができ、また、磁界の強さや方向を電気信号で取
出すことができるので、航法制御システム等の他
の電子機器との結合が容易となり、さらにまた、
偏差に関する補正値をデータベース化し、自動補
正するようにして方位測定装置を構成することが
できる等の利点がある。 As explained above, according to the present invention, three magnetic elements whose electromechanical coupling coefficient gradually increases by application of an external magnetic field, and whose electromechanical coupling coefficient reaches a maximum value when a predetermined external magnetic field is applied, are connected to each other. arranged in three orthogonal directions, first and second coils are arranged at one end and the other end of each of the three magnetic elements,
Furthermore, a magnetic field detection section is provided in which third and fourth coils are disposed at the locations where the first and second coils of each of the three magnetic elements are disposed, and a first coil corresponding to each of the above-mentioned magnetic elements. means for applying an alternating current signal that causes the magnetic elements to resonate; means for applying a direct current that generates the predetermined external magnetic field to a third coil corresponding to each of the magnetic elements; and a fourth coil that corresponds to each of the magnetic elements. means for applying a signal current while sequentially changing the magnitude and polarity; means for detecting the voltage value of a detection signal generated in a second coil corresponding to each of the magnetic elements; means for measuring the magnetic field strength and direction of the magnetic element from the magnitude and polarity of the signal current when the signal current is bent, and the strength and direction of the external magnetic field from the magnetic field strength and the direction of the magnetic field in the three directions. Since it consists of a means for measuring etc., there are no moving parts and therefore,
Measurements can be started immediately after the power is turned on, and the strength and direction of all magnetic fields can be measured with high accuracy without the need for complicated operations or handling.In addition, the magnetic field detection section can be installed separately from other parts. , remote sensing is possible, the distance between them can be freely set, and it can be configured with inexpensive magnetic elements, a small number of coils, and a simple electric circuit, resulting in low cost and low power consumption. In addition, the strength and direction of the magnetic field can be extracted as electrical signals, making it easy to connect with other electronic equipment such as navigation control systems.
There are advantages such as the ability to compose an azimuth measuring device such that correction values related to deviations are compiled into a database and automatically corrected.
図面は本発明の説明に供するもので、第１図は
本発明の磁界検出装置の基本原理を説明するため
のセンサーの斜視図、第２図は第１図のセンサー
における入力電流と出力電圧との関係を示す説明
図、第３図乃至第６図は本発明の磁界測定装置の
一実施例を示し、第３図は磁界検出部の斜視図、
第４図は電気回路部のブロツク図、第５図はマイ
クロプロセツサの動作フローを示す図、第６図は
地磁気の全磁力と各成分との関係を示す説明図、
第７図は本発明の他の実施例を示す斜視図であ
る。
１１，２１，３１……アモルフアス合金のリボ
ン、１２，２２，３２……励振コイル、１３，２
３，３３……検出コイル、１４，２４，３４……
励振バイアスコイル、１５，２５，３５……検出
バイアスコイル、４０，４１……マルチプレク
サ、４３……同期検波器、４４……ローパスフイ
ルタ、４５……コンパレータ、４６……信号発生
器、４７……励振用磁気バイアス電流源、４８…
…Ｄ−Ａ変換器、４９……マイクロプロセツサ。
The drawings serve to explain the present invention. Figure 1 is a perspective view of a sensor for explaining the basic principle of the magnetic field detection device of the present invention, and Figure 2 shows the input current and output voltage of the sensor in Figure 1. 3 to 6 show an embodiment of the magnetic field measuring device of the present invention, and FIG. 3 is a perspective view of the magnetic field detection section,
FIG. 4 is a block diagram of the electric circuit section, FIG. 5 is a diagram showing the operation flow of the microprocessor, and FIG. 6 is an explanatory diagram showing the relationship between the total magnetic force of the earth's magnetism and each component.
FIG. 7 is a perspective view showing another embodiment of the present invention. 11, 21, 31... Amorphous amorphous alloy ribbon, 12, 22, 32... Excitation coil, 13, 2
3, 33...detection coil, 14, 24, 34...
Excitation bias coil, 15, 25, 35...Detection bias coil, 40, 41...Multiplexer, 43...Synchronous detector, 44...Low pass filter, 45...Comparator, 46...Signal generator, 47... Magnetic bias current source for excitation, 48...
...D-A converter, 49...microprocessor.
Claims (1)
次増大し、所定の外部磁界が加わつた時に該電気
機械結合係数が最大値となる磁性素子を３個、互
いに直交する３方向に配置し、該３個の磁性素子
のそれぞれの一端及び他端に第１及び第２のコイ
ルを配設し、さらに上記３個の磁性素子のそれぞ
れの第１及び第２のコイルの配設部位に第３及び
第４のコイルを配設した磁界検出部と、 上記各磁性素子に対応する第１のコイルに磁性
素子を共振させる交流信号を加える手段と、 上記各磁性素子に対応する第３のコイルに上記
所定の外部磁界を発生させる直流電流を加える手
段と、 上記各磁性素子に対応する第４のコイルに信号
電流を大きさ及び極性を順次変えながら加える手
段と、 上記各磁性素子に対応する第２のコイルに発生
する検出信号の電圧値を検出する手段と、 上記検出信号の電圧値が極小となつた時の上記
信号電流の大きさ及び極性からその磁性素子の方
向の磁界強さと磁界の向きを測定する手段と、 上記３方向の磁界強さと磁界の向きとから外部
磁界の強さ、方向等を測定する手段と からなる磁界測定装置。 ２ 磁性素子としてアモルフアス合金のリボンを
用いたことを特徴とする特許請求の範囲第１項記
載の磁界測定装置。[Claims] 1. Three magnetic elements whose electromechanical coupling coefficient gradually increases by application of an external magnetic field and whose electromechanical coupling coefficient reaches a maximum value when a predetermined external magnetic field is applied, and three magnetic elements in three directions orthogonal to each other. and disposing first and second coils at one end and the other end of each of the three magnetic elements, and further disposing the first and second coils of each of the three magnetic elements. a magnetic field detection unit having third and fourth coils disposed at the portion thereof; means for applying an alternating current signal that causes the magnetic element to resonate to the first coil corresponding to each of the magnetic elements; means for applying a direct current to the third coil to generate the predetermined external magnetic field; means for applying a signal current to a fourth coil corresponding to each of the magnetic elements while sequentially changing the magnitude and polarity; and each of the magnetic elements means for detecting the voltage value of a detection signal generated in a second coil corresponding to the second coil; and a magnetic field in the direction of the magnetic element based on the magnitude and polarity of the signal current when the voltage value of the detection signal becomes minimum. A magnetic field measuring device comprising means for measuring the strength and direction of the magnetic field, and means for measuring the strength, direction, etc. of an external magnetic field from the magnetic field strength and direction of the three directions. 2. The magnetic field measuring device according to claim 1, wherein an amorphous alloy ribbon is used as the magnetic element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16674583A JPS6058564A (en) | 1983-09-12 | 1983-09-12 | Magnetic field measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16674583A JPS6058564A (en) | 1983-09-12 | 1983-09-12 | Magnetic field measuring apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6058564A JPS6058564A (en) | 1985-04-04 |
| JPH0352833B2 true JPH0352833B2 (en) | 1991-08-13 |
Family
ID=15836960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16674583A Granted JPS6058564A (en) | 1983-09-12 | 1983-09-12 | Magnetic field measuring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6058564A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100681420B1 (en) | 2004-12-30 | 2007-02-09 | 이기봉 | Fluxgate Geomagnetic Sensor Driving Circuit |
| CN109730770B (en) * | 2018-12-25 | 2020-08-21 | 大博医疗科技股份有限公司 | Method for reducing volume of magnetic field receiving unit and measuring magnetic field change rate, magnetic field receiving unit, electromagnetic tracking system and application |
-
1983
- 1983-09-12 JP JP16674583A patent/JPS6058564A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6058564A (en) | 1985-04-04 |
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