JPH01163686A - Magnetic sensor - Google Patents
Magnetic sensorInfo
- Publication number
- JPH01163686A JPH01163686A JP62323201A JP32320187A JPH01163686A JP H01163686 A JPH01163686 A JP H01163686A JP 62323201 A JP62323201 A JP 62323201A JP 32320187 A JP32320187 A JP 32320187A JP H01163686 A JPH01163686 A JP H01163686A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnetic field
- magnetic body
- current
- detection winding
- 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.)
- Granted
Links
- 238000004804 winding Methods 0.000 claims abstract description 32
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 239000000696 magnetic material Substances 0.000 claims abstract description 18
- 239000004020 conductor Substances 0.000 claims description 5
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 13
- 230000005389 magnetism Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 230000005284 excitation Effects 0.000 description 5
- 239000000758 substrate Substances 0.000 description 3
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 208000023514 Barrett esophagus Diseases 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005358 geomagnetic field Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Measuring Magnetic Variables (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
木発朗は、磁界の有無、大小、角度等を検出することが
でき、方位センサ、位置センサ、傾斜センサ、電流セン
サ等に使用てきる磁気センサに関する。[Detailed Description of the Invention] (Field of Industrial Application) Kihatsuro can detect the presence or absence of a magnetic field, its magnitude, angle, etc., and can be used in azimuth sensors, position sensors, tilt sensors, current sensors, etc. Regarding magnetic sensors.
（従来の技術）
従来の磁気センサは、第１５図に示すように、磁芯１に
励磁巻線２と検出巻線３とを巻回し、励磁巻線２に電源
４により交流電流を流し、これにより磁芯ｌに磁芯の軸
心方向に内部磁界Ｈ８を発生させ、該内部磁界Ｈ，に対
してバイアスとして作用する外部磁界Ｈｏの大きさによ
り、検出巻線３の出力端子５に現われる基本波または高
調波の出力電圧か変化するように構成されている。この
磁気センサは、例えば電流センサとして使用されるもの
て、電流の大小によって変化する外部磁界Ｈｏの大小の
変化が出力電圧の変化として検出てきる。(Prior Art) As shown in FIG. 15, a conventional magnetic sensor has an excitation winding 2 and a detection winding 3 wound around a magnetic core 1, and a power source 4 passing alternating current through the excitation winding 2. As a result, an internal magnetic field H8 is generated in the magnetic core l in the axial direction of the magnetic core, and due to the magnitude of the external magnetic field Ho acting as a bias on the internal magnetic field H, a voltage appears at the output terminal 5 of the detection winding 3. The output voltage of the fundamental wave or harmonics is configured to change. This magnetic sensor is used, for example, as a current sensor, and detects changes in the magnitude of the external magnetic field Ho, which changes depending on the magnitude of the current, as changes in the output voltage.
第１６図は、第１５図の磁気センサの用途を変えたもの
て、磁芯ｌと外部磁界Ｉｔｏとの相対的な向きか変化す
るように磁気センサあるいは磁石等の外部磁界発生手段
を配置し、磁芯ｌの内部磁界１１□に対し、外部磁界Ｉ
Ｉｏの磁芯１と同方向成分１１ｏ−ｃｏＳθの変化か出
力電圧の変化として現われるようにしだものである。こ
の磁気センサば、単体あるいは複数個のものを組合わせ
て方位センサ、傾斜センサ等に使用される。Fig. 16 shows a modification of the magnetic sensor shown in Fig. 15, in which a magnetic sensor or an external magnetic field generating means such as a magnet is arranged so that the relative direction of the magnetic core l and the external magnetic field Ito can be changed. , for the internal magnetic field 11□ of the magnetic core l, the external magnetic field I
This appears as a change in the component 11o-coSθ of Io in the same direction as the magnetic core 1 or a change in the output voltage. These magnetic sensors are used singly or in combination as azimuth sensors, inclination sensors, and the like.
第１５図および第１６図に示す磁気センサは、第１７図
（Ａ）に示すように、内部磁界１１□に対し、外部磁界
＋（０の磁束の方向か平行となり、第１７図（Ｂ）に示
すように、外部磁界Ｈ８と内部磁界１１□の向きか回し
である場合には磁界強度か最大となり、同（Ｃ）に示す
ように逆方向になると最小となり、この変化か出力電圧
として検出できるわけである。In the magnetic sensor shown in FIGS. 15 and 16, the direction of the magnetic flux of the external magnetic field +(0) is parallel to the internal magnetic field 11□, as shown in FIG. 17(B). As shown in (C), when the external magnetic field H8 and internal magnetic field 11□ are in the opposite direction, the magnetic field strength is maximum, and as shown in (C), when the direction is reversed, it is minimum, and this change is detected as the output voltage. It can be done.
」−記の他、従来の磁気センサとして、ホール素子を用
いたものかある。In addition to the above, there are other conventional magnetic sensors that use Hall elements.
（発明か解決しようとする問題点）
上記従来の磁気センサのうち、第１５図および第１６図
に示したものは、励磁巻線２と検出巻線３の２つの巻線
か必要てあり、構造か複雑になるという問題点かある。(Problems to be Solved by the Invention) Among the conventional magnetic sensors described above, the ones shown in FIGS. 15 and 16 require two windings, an excitation winding 2 and a detection winding 3. There is a problem with the structure being complicated.
また、ホール素子を用いた磁気センサは、感度か悪いと
いう問題点かある。Furthermore, magnetic sensors using Hall elements have a problem of poor sensitivity.
（問題点を解決するだめの手段）
本発明の磁気センサは、導電性を有する線状、帯状ある
いは棒状の磁性体と、該磁性体に長手方向にパルス電流
あるいは交流電流を流す手段と、該磁性体に巻回された
検出巻線とからなり、前記パルス電流あるいは交流電流
により前記磁性体の周回方向に生しる磁界によって外部
磁界を前記検出巻線に生しる電気信号として検出する構
成とすることにより、励磁巻線を不要として小形、軽量
化を達成し、また、高感度の磁気センサを実現したもの
である。(Means for Solving the Problems) The magnetic sensor of the present invention comprises: a conductive magnetic body in the form of a linear, strip, or rod; a means for passing a pulsed current or an alternating current in the longitudinal direction of the magnetic body; A configuration comprising a detection winding wound around a magnetic material, and detects an external magnetic field as an electric signal generated in the detection winding by a magnetic field generated in the circumferential direction of the magnetic material by the pulsed current or alternating current. This eliminates the need for an excitation winding, achieving a smaller size and lighter weight, and also realizing a highly sensitive magnetic sensor.
また本発明の目的は、前記磁性体の代わりに、周囲に磁
性体を設けた線状、帯状あるいは棒状の導体を用いても
達成てきる。Further, the object of the present invention can be achieved by using a linear, band-shaped, or rod-shaped conductor having a magnetic material around it instead of the magnetic material.
（実施例）
第１図は本発明による磁気センサの一実施例てあり、該
実施例の磁気センサは、導電性を有する線状あるいは棒
状の磁性体１０と、該磁性体１０に長手方向にパルス電
流あるいは交流量流を流す手段としての電源１１と、該
磁性体１０に巻回された検出巻線１２とからなり、第２
図に示すように、前記パルス電流あるいは交流電流によ
り前記磁性体１０の周回方向に内部磁界Ｈ８を発生させ
、該内部磁界Ｈ，によって外部磁界Ｈｏを前記検出巻線
１２に生しる電気信号として検出するものである。(Embodiment) FIG. 1 shows an embodiment of a magnetic sensor according to the present invention, and the magnetic sensor of this embodiment includes a linear or rod-shaped magnetic body 10 having conductivity, and a longitudinal direction of the magnetic body 10. It consists of a power source 11 as a means for passing a pulsed current or an alternating current, and a detection winding 12 wound around the magnetic body 10.
As shown in the figure, an internal magnetic field H8 is generated in the circumferential direction of the magnetic body 10 by the pulsed current or alternating current, and the internal magnetic field H generates an external magnetic field Ho in the detection winding 12 as an electric signal. It is something to detect.
第３図は、電源１１により発生させる電圧パルスＥ、に
より磁性体１０にパルス電流を流した場合、外部磁界Ｈ
６が内部磁界１１□と異なる方向に存在する際に、検出
巻線１２の出力端子１３に現われる出力電圧Ｅ。を示す
ものであり、パルス電流の立ち上かりまたは立ち下がり
において、出力端子１３に現れる電圧Ｅ。の波高値Ｈは
、外部磁界Ｈ６の強度か所定の大きさ以下であれば、そ
の強度が大であるほど、また、外部磁界Ｈｏの向きか磁
性体１０の向きに近い程大となる。FIG. 3 shows that when a pulse current is passed through the magnetic body 10 by a voltage pulse E generated by a power source 11, an external magnetic field H
6 is in a different direction from the internal magnetic field 11□, the output voltage E appearing at the output terminal 13 of the detection winding 12. The voltage E that appears at the output terminal 13 at the rise or fall of the pulse current. If the intensity of the external magnetic field H6 is less than a predetermined value, the wave height value H becomes larger as the intensity is larger and as the direction of the external magnetic field Ho is closer to the direction of the magnetic body 10.
［実施例１ ］ Ｇｏ系磁性材て磁歪ゼロのアモルファ
スワイヤ（線径１２５１Ｉｍ、長さ６５＋＋＋ｍ）を前
記磁性体１０として用い、その周囲に検出巻線１２を２
００ターン巻回し、地磁気の水平成分に対してアモルフ
ァスワイヤか平行になるように非磁性基板上に配置した
。このアモルファスワイヤの両端に振幅２ｖ、デユーテ
ィ−ファクタ５０％、繰返し周期１０μｓのパルスを印
加した。この状態て磁性体１０を水平に保ちながら時計
回り方向に回転すると、端子１３に現われる電圧は第４
図に示すように推移した。第４図は、磁性体ｌＯの向き
か地磁気の水平成分に対して０度、９０度、１８０度、
２７０度をなす場合を示しており、出力電圧（尖頭値、
以下同じ）は０度、１８０度、すなわち磁性体１０の向
きか地磁気の水平成分と同方向の場合に最大となり、出
力電圧の極性は逆になる。また、出力電圧は、９０度、
２７０度、すなわち磁性体１０の向きか地磁気の水平成
分に対して直角をなす場合に最小となる。[Example 1] An amorphous wire (wire diameter 1251 Im, length 65+++ m) made of Go-based magnetic material and having zero magnetostriction was used as the magnetic body 10, and two detection windings 12 were arranged around it.
The wire was wound with 00 turns and placed on a non-magnetic substrate so that the amorphous wire was parallel to the horizontal component of the earth's magnetism. A pulse with an amplitude of 2 V, a duty factor of 50%, and a repetition period of 10 μs was applied to both ends of this amorphous wire. In this state, if the magnetic body 10 is rotated clockwise while keeping it horizontal, the voltage appearing at the terminal 13 will be the fourth voltage.
The trend has been as shown in the figure. Figure 4 shows the orientation of the magnetic material lO or the horizontal component of the earth's magnetism at 0 degrees, 90 degrees, 180 degrees,
The output voltage (peak value,
(same below) is maximum at 0 degrees and 180 degrees, that is, when the direction of the magnetic body 10 is the same as the horizontal component of the earth's magnetism, and the polarity of the output voltage is reversed. Also, the output voltage is 90 degrees,
It is minimum at 270 degrees, that is, when the direction of the magnetic body 10 is perpendicular to the horizontal component of the earth's magnetism.
第５図は磁性体ｌＯの地磁気の水平成分に対する回転角
度と出力電圧（印加した矩形電圧パルスの立ち」−かり
部分で発生ずる出力電圧）との関係を示すものて、コサ
インカーブを描く。FIG. 5 shows the relationship between the rotation angle of the magnetic material lO with respect to the horizontal component of the earth's magnetism and the output voltage (the output voltage generated at the rising edge of the applied rectangular voltage pulse), and draws a cosine curve.
このような磁性体ｌＯの回転角度と出力電圧との関係か
ら、この磁気センサは、方位センサ（たたし東西のどち
ら側に傾斜しているかは不明である。）や、磁石等で発
生させた磁界の方向に対する磁性体１０の傾斜を求める
傾斜センサや、出力電圧か外部磁界強度に比例すること
を利用した電流センサや、可動体と静止体にそれぞれ磁
性体１０あるいは磁石等を取付け、磁性体ｌＯか磁石等
に対向した際に出力か現れるような位置センサまたは回
転センサ等に用いることかてきる。Because of the relationship between the rotation angle of the magnetic material lO and the output voltage, this magnetic sensor can be used with a direction sensor (it is unknown which side of the tread is tilted, east or west) or a magnet. An inclination sensor that measures the inclination of the magnetic body 10 with respect to the direction of a magnetic field; a current sensor that uses the fact that the output voltage is proportional to the strength of an external magnetic field; It can be used for position sensors, rotation sensors, etc. that produce an output when the body 10 faces a magnet or the like.
なお、磁性体１０の材料として前記径、材質のアモルフ
ァスワイヤを用い、磁性体ｌＯの長さを４０１１１ｍ
〜１３０ｍｍの範囲で変え、検出巻線１２の巻き数を２
００ターン（同ピツチ）とし、繰返し周期１０μｓ、チ
ューティーファクタ５０％の定電流パルスを磁性体１０
に流した場合、地磁気の水平成分の方向に磁性体１０を
向けたときの出力電圧の変化を調べた。その結果は、＄
６図に示すように、磁性体長か長くなると出力電圧かや
や増大するという結果を得た。Note that an amorphous wire having the diameter and material described above is used as the material of the magnetic body 10, and the length of the magnetic body 10 is 40111 m.
~130mm, and the number of turns of the detection winding 12 is 2.
00 turns (same pitch), a constant current pulse with a repetition period of 10 μs and a tutie factor of 50% is applied to the magnetic material 10.
The change in output voltage was investigated when the magnetic body 10 was oriented in the direction of the horizontal component of the earth's magnetism. The result is $
As shown in Figure 6, we obtained the result that as the length of the magnetic body increases, the output voltage increases slightly.
また、第７図は、入力電圧と出力電圧との関係を示した
図で、この場合の磁性体１０の材質、径は前記同様で、
長さを６５ｍｍとしく該磁性体１０の直流抵抗は１２Ω
であった。）、繰返し周期ｌＯμＳ、デユーティ−ファ
クタ５０％の入力電圧の振幅をＯ，ＳＶ〜２．Ｏｖの範
囲で変化させ、地磁気の水平成分の方向に磁性体１０を
向けたときの出力電圧の変化を調べたものである。第７
図から、２Ｖ近くまでは入力電圧、すなわち入力電流の
増大に比例して出力電圧か増大することかわかる。Moreover, FIG. 7 is a diagram showing the relationship between input voltage and output voltage, and the material and diameter of the magnetic body 10 in this case are the same as above,
The length is 65 mm, and the DC resistance of the magnetic body 10 is 12Ω.
Met. ), repetition period lOμS, duty factor 50%, input voltage amplitude is O,SV~2. The change in the output voltage was investigated when the magnetic body 10 was oriented in the direction of the horizontal component of the earth's magnetism. 7th
From the figure, it can be seen that the output voltage increases in proportion to the increase in the input voltage, that is, the input current, up to nearly 2V.
また第８図は、第７図における試験条件において、入力
電圧の振幅を２■とし、繰返し周期を４μｓ〜１００μ
ｓに変化させた場合の出力電圧の変化を示すものて、繰
返し周期によっては出力電圧は大きくは変化しない。In addition, Fig. 8 shows that under the test conditions shown in Fig. 7, the amplitude of the input voltage is 2■, and the repetition period is 4μs to 100μs.
The output voltage does not change significantly depending on the repetition period.
［実施例２］磁性体１０として、実施例１と同様のＣｏ
系磁歪セロの材質て、幅１■、板厚１５μｍの細い帯状
のものを用い、２００ターンの検出巻線１２を巻回し、
同様の回路で地磁気に対する感度を測定した結果、ワイ
ヤの場合と同様の傾向を示した。[Example 2] The same Co as in Example 1 was used as the magnetic body 10.
A thin strip-shaped magnetostrictive cello material with a width of 1 mm and a plate thickness of 15 μm is used, and a detection winding 12 of 200 turns is wound thereon.
When we measured the sensitivity to geomagnetic field using a similar circuit, we found a similar trend to that of the wire.
また、帯状磁性体１０の長さを３８＋ｎ＋ｎ（該磁性体
１０の直流抵抗は３Ωてあった。）、入力電圧の振幅を
０．５Ｖ、繰返し周期を２５μｓ、デユーティ−ファク
タ５０％の電圧を磁性体ＩＯに印加し、その立ち」−か
り時間を０．５μｓ〜２．０μｓの範囲て変化させた場
合の出力電圧の変化を第１０図に示す。第９図かられか
るように、入力パルスの立ち」−かり時間か短い程出力
電圧が高くなるという傾向が顕著に現われる。In addition, the length of the strip magnetic body 10 was 38+n+n (the DC resistance of the magnetic body 10 was 3Ω), the amplitude of the input voltage was 0.5V, the repetition period was 25 μs, and the voltage with a duty factor of 50% was applied to the magnetic field. FIG. 10 shows changes in the output voltage when the voltage is applied to the body IO and the rise time is varied in the range of 0.5 μs to 2.0 μs. As can be seen from FIG. 9, there is a remarkable tendency that the output voltage becomes higher as the rising time of the input pulse becomes shorter.
［実施例３］実施例２と同様の材質、寸法の帯状磁性体
を２本用い、第１０図に示すように、これらの磁性体１
０ｘ、１０ｙに検出巻線１２ｘ、１２ｙを２００タ一ン
巻回したものを直交させて配設し、電源１１に対し、磁
性体１０ｘ、ｌｏｙを直列に接続し、振＠２ｖ、デユー
ティ−ファクタ５０％、繰返し周期２５μｓの電圧パル
スを加え、磁性体１０ｘ、１０ｙを水平に保ち、時計回
り方向に回転し、各検出巻線１２ｘ、１２ｙの出力電圧
Ｅｘ、 Ｅｙを測定した。その結果、第１１図に示すよ
うに、出力か推移した。第１１図は第１０図のように磁
性体１０ｘ、ｌｏｙを配置した場合を回転角度ゼロ度と
し、回転角度を変化したときの出力電圧Ｅｘ、 Ｅｙの
変化を示す図であり、第１１図に示すように、方位によ
り、２つの出力電圧Ｅｘ、 Ｅｙの極性と値の組合わせ
か一義的に決定されることから、この交叉形の磁気セン
サは、方位センサとして用いることか可能である。[Example 3] Using two strip-shaped magnetic bodies having the same material and dimensions as in Example 2, as shown in FIG. 10, these magnetic bodies 1
Detection windings 12x and 12y wound with 200 turns are arranged perpendicularly to 0x and 10y, and the magnetic bodies 10x and 10y are connected in series to the power supply 11, with a vibration @ 2v and a duty factor. A voltage pulse of 50% and a repetition period of 25 μs was applied, the magnetic bodies 10x and 10y were held horizontally and rotated clockwise, and the output voltages Ex and Ey of each detection winding 12x and 12y were measured. As a result, the output changed as shown in FIG. Fig. 11 is a diagram showing the changes in the output voltages Ex and Ey when the rotation angle is changed, assuming that the rotation angle is zero degree when the magnetic bodies 10x and loy are arranged as shown in Fig. 10. As shown, since the combination of polarity and value of the two output voltages Ex and Ey is uniquely determined by the orientation, this cross-shaped magnetic sensor can be used as an orientation sensor.
第１２図は第１０図に示した磁気センサの処理回路の一
例であり、各出力電圧Ｅｘ、 Ｅｙの位相検波後の波高
値をそれぞれサンプルホールド回路１４ｘ、１４ｙによ
り保持し、その各電圧値をそれぞれＡ−Ｄ変換回路１５
ｘ、１５ｙによりテシタル値に変換し、例えばマイクロ
コンピュータ１６によって方位信号を算出し、マイクロ
コンピュータ１６に付帯した表示器１７によって表示す
るものである。なお、前記出力電圧Ｅｘ、 Ｅｙの処理
回路としては第１２図の他種々のものが用いられること
は勿論である。FIG. 12 is an example of the processing circuit of the magnetic sensor shown in FIG. 10, in which the peak values of the output voltages Ex and Ey after phase detection are held by sample and hold circuits 14x and 14y, respectively, and the respective voltage values are A-D conversion circuit 15 respectively
x, 15y are converted into digital values, and the microcomputer 16 calculates an azimuth signal, which is displayed on a display 17 attached to the microcomputer 16. It goes without saying that various circuits other than the one shown in FIG. 12 may be used as the processing circuits for the output voltages Ex and Ey.
第１３図は本発明の他の実施例であり、アルミナ等の基
板２０上に膜形成技術により磁性体膜２１を形成し、基
板２０と共に磁性体膜２１に検出巻線２２を巻装し、磁
性体膜２１に前記電源１１より通電し、外部磁界を検出
巻線２２に生しる電気信号として検出するようにしたも
のである。FIG. 13 shows another embodiment of the present invention, in which a magnetic film 21 is formed on a substrate 20 of alumina or the like by a film forming technique, and a detection winding 22 is wound around the magnetic film 21 together with the substrate 20. The magnetic film 21 is energized by the power source 11, and the external magnetic field is detected as an electric signal generated in the detection winding 22.
上記実施例においては、＠源１１による矩形電圧パルス
を磁性体１０に印加する例について示したが、三角波あ
るいは正弦波等、他の波形の電圧を印加するようにして
もよい。また、磁性体１０としては、導電性があり、か
つ高い透磁率て飽和磁束密度の大きな前記アモルファス
合金の他、同様の特性を有するパーマロイか好ましいか
、同様な特性てあれば、他の材質のものを用いてもよい
。また、第１４図に示すように、金属等の導電体１０ａ
の周囲にフェライトやアモルファス合金等の磁性材１０
ｂを固着したもの、あるいは磁性材１０ｂを別体に構成
して導電体１０ａを挿入したものも用いられる。また、
電流値か大きい用途においては、径の大きな断面円形あ
るいは矩形等の棒状のものを用いることかてきる。さら
に、磁性体１０の組合わせは任意に行なうことかできる
。In the above embodiment, an example was shown in which a rectangular voltage pulse from the source 11 was applied to the magnetic body 10, but a voltage having another waveform such as a triangular wave or a sine wave may be applied. In addition to the above-mentioned amorphous alloy, which is electrically conductive and has high magnetic permeability and a large saturation magnetic flux density, the magnetic material 10 may preferably be permalloy, which has similar characteristics, or may be made of other materials if it has similar characteristics. You may also use Further, as shown in FIG. 14, a conductor 10a such as metal
Magnetic material 10 such as ferrite or amorphous alloy is placed around the
A structure in which the magnetic material 10b is fixed or a structure in which the magnetic material 10b is constructed separately and the conductor 10a is inserted may also be used. Also,
In applications where the current value is large, it is possible to use a rod-shaped one with a large diameter and a circular or rectangular cross section. Furthermore, the combinations of magnetic bodies 10 can be made arbitrarily.
（発明の効果）
以上述べたように、本発明の磁気センサは、パルス電流
あるいは交流電流により磁性体の周回方向に生じる磁界
によって外部磁界を前記検出巻線に生じる電気信号とし
て検出する構成としたものであり、従来の磁芯を有する
磁気センサで必要とした励磁巻線が不要となるので、構
成か簡略化され、方位センサに例をとれば、前記のよう
な細線によって磁性体か実現てきるから、従来のトロイ
タル磁芯を有するものに比較し、約１７１０〜］／１０
０程度に軽量化され、廉価に提供できる。また、軽量で
高感度の磁気センサが実現てき、微小磁界の検出の用途
にも用いることかてきる。(Effects of the Invention) As described above, the magnetic sensor of the present invention has a configuration in which an external magnetic field is detected as an electric signal generated in the detection winding by a magnetic field generated in the circumferential direction of a magnetic body by a pulsed current or an alternating current. This eliminates the need for the excitation winding required in conventional magnetic sensors with magnetic cores, simplifying the structure.For example, in the case of direction sensors, magnetic materials can be realized using thin wires as described above. Therefore, compared to the conventional one with a troital magnetic core, it is about 1710~]/10
The weight is reduced to about 0, and it can be provided at a low price. Furthermore, a lightweight and highly sensitive magnetic sensor has been realized, which can also be used for detecting minute magnetic fields.
第１図は本発明の磁気センサの一実施例を示す構成図、
第２図は本発明の原理説明図、第３図は本発明における
入力電圧と出力電圧との関係の一例を示す波形図、第４
図は第１図の実施例における各回転角に対応した出力電
圧波形を示す写真図、第５図は第１図の実施例における
回転角と出力電圧との関係図、第６図は該実施例におけ
る磁性体長と出力電圧との関係図、第７図は該実施例に
おける入カバルス電圧と出力電圧との関係図、第８図は
該実施例における繰返し周期と出力電圧との関係図、第
９図は磁性体として帯状のものを用いた場合における入
カバルス立ち上がり時間と出力電圧との関係図、第１０
図は磁性体を直交させた本発明の他の実施例を示す構成
図、第１１図は該実施例における回転角と出力電圧との
関係図、第１２図は該実施例の処理回路の一例図、第１
３図は本発明の他の実施例を示す斜視図、第１＋７
４図本願の第２発明の実施例を示す図、第１５図へ
および第１６図は従来の磁気センサを示す構成図、第１
７図は従来の磁気センサの原理図てある。FIG. 1 is a configuration diagram showing an embodiment of the magnetic sensor of the present invention;
FIG. 2 is a diagram explaining the principle of the present invention, FIG. 3 is a waveform diagram showing an example of the relationship between input voltage and output voltage in the present invention, and FIG.
The figure is a photographic diagram showing the output voltage waveform corresponding to each rotation angle in the embodiment shown in Fig. 1, Fig. 5 is a diagram showing the relationship between the rotation angle and the output voltage in the embodiment shown in Fig. FIG. 7 is a diagram of the relationship between the magnetic body length and output voltage in the example, FIG. 7 is a diagram of the relationship between the input cabling voltage and output voltage in the example, and FIG. Figure 9 is a diagram of the relationship between the input pulse rise time and the output voltage when a strip-shaped magnetic material is used.
The figure is a block diagram showing another embodiment of the present invention in which the magnetic bodies are orthogonal to each other, FIG. 11 is a diagram of the relationship between the rotation angle and the output voltage in this embodiment, and FIG. 12 is an example of a processing circuit of this embodiment. Figure, 1st
FIG. 3 is a perspective view showing another embodiment of the present invention, FIG. 1+7 is a diagram showing an embodiment of the second invention of the present application, FIGS. 1
Figure 7 shows the principle of a conventional magnetic sensor.
Claims (1)
、該磁性体に長手方向にパルス電流あるいは交流電流を
流す手段と、該磁性体に巻回された検出巻線とからなり
、前記パルス電流あるいは交流電流により前記磁性体の
周回方向に生じる磁界によって外部磁界を前記検出巻線
に生じる電気信号として検出する構成を有することを特
徴とする磁気センサ。 ２、周囲に磁性体を設けた線状、帯状あるいは棒状の導
体と、該導体に長手方向にパルス電流あるいは交流電流
を流す手段と、該磁性体に巻回された検出巻線とからな
り、前記パルス電流あるいは交流電流により前記磁性体
の周回方向に生じる磁界によって外部磁界を前記検出巻
線に生じる電気信号として検出する構成を有することを
特徴とする磁気センサ。[Scope of Claims] 1. A linear, band-shaped, or rod-shaped magnetic body having conductivity, means for passing a pulse current or alternating current in the longitudinal direction of the magnetic body, and a detection winding wound around the magnetic body. 1. A magnetic sensor comprising a wire, and configured to detect an external magnetic field as an electric signal generated in the detection winding by a magnetic field generated in the circumferential direction of the magnetic body by the pulsed current or alternating current. 2. Consisting of a linear, band-shaped or rod-shaped conductor with a magnetic material around it, means for passing a pulsed current or alternating current in the longitudinal direction of the conductor, and a detection winding wound around the magnetic material, A magnetic sensor characterized in that the magnetic sensor is configured to detect an external magnetic field as an electric signal generated in the detection winding by a magnetic field generated in the circumferential direction of the magnetic body by the pulse current or alternating current.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62323201A JP2617498B2 (en) | 1987-12-21 | 1987-12-21 | Magnetic sensor |
| US07/287,153 US4939459A (en) | 1987-12-21 | 1988-12-21 | High sensitivity magnetic sensor |
| DE3843087A DE3843087C2 (en) | 1987-12-21 | 1988-12-21 | Magnetic field sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62323201A JP2617498B2 (en) | 1987-12-21 | 1987-12-21 | Magnetic sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01163686A true JPH01163686A (en) | 1989-06-27 |
| JP2617498B2 JP2617498B2 (en) | 1997-06-04 |
Family
ID=18152172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62323201A Expired - Lifetime JP2617498B2 (en) | 1987-12-21 | 1987-12-21 | Magnetic sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2617498B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10170355A (en) * | 1996-12-06 | 1998-06-26 | Kagaku Gijutsu Shinko Jigyodan | High-sensitivity stress detecting apparatus |
| US6831457B2 (en) | 2002-02-19 | 2004-12-14 | Aichi Micro Intelligent Corporation | Two-dimensional magnetic sensor including magneto-impedance sensor elements |
| US6909368B2 (en) | 2002-03-04 | 2005-06-21 | Aichi Micro Intelligent Corporation | Magnetic field detection device |
| US7071688B2 (en) | 2003-02-10 | 2006-07-04 | Samsung Electronics Co., Ltd. | Magnetic field sensing device and method for fabricating thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5839527B1 (en) | 2015-02-16 | 2016-01-06 | マグネデザイン株式会社 | Ultra-sensitive micro magnetic sensor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54156575A (en) * | 1978-05-31 | 1979-12-10 | Tdk Corp | Magnetic detecting element |
-
1987
- 1987-12-21 JP JP62323201A patent/JP2617498B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54156575A (en) * | 1978-05-31 | 1979-12-10 | Tdk Corp | Magnetic detecting element |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10170355A (en) * | 1996-12-06 | 1998-06-26 | Kagaku Gijutsu Shinko Jigyodan | High-sensitivity stress detecting apparatus |
| US6831457B2 (en) | 2002-02-19 | 2004-12-14 | Aichi Micro Intelligent Corporation | Two-dimensional magnetic sensor including magneto-impedance sensor elements |
| US6909368B2 (en) | 2002-03-04 | 2005-06-21 | Aichi Micro Intelligent Corporation | Magnetic field detection device |
| US7071688B2 (en) | 2003-02-10 | 2006-07-04 | Samsung Electronics Co., Ltd. | Magnetic field sensing device and method for fabricating thereof |
| US7145332B2 (en) | 2003-02-10 | 2006-12-05 | Samsung Electronics Co., Ltd. | Magnetic field sensing device and method for fabricating thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2617498B2 (en) | 1997-06-04 |
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