JPH0240551Y2 - - Google Patents
Info
- Publication number
- JPH0240551Y2 JPH0240551Y2 JP1982011599U JP1159982U JPH0240551Y2 JP H0240551 Y2 JPH0240551 Y2 JP H0240551Y2 JP 1982011599 U JP1982011599 U JP 1982011599U JP 1159982 U JP1159982 U JP 1159982U JP H0240551 Y2 JPH0240551 Y2 JP H0240551Y2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- heater
- temperature
- detection device
- temperature sensor
- 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.)
- Expired
Links
- 238000001514 detection method Methods 0.000 claims description 5
- 230000004907 flux Effects 0.000 claims description 2
- 238000004804 winding Methods 0.000 description 4
- 230000001939 inductive effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005358 geomagnetic field Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
Landscapes
- Measuring Magnetic Variables (AREA)
Description
【考案の詳細な説明】 本考案は磁気検出器に関する。[Detailed explanation of the idea] The present invention relates to a magnetic detector.
磁気検出器として広く用いられているフラツク
ス・ゲート型磁気検出器は、磁気コアを備えてい
るが、この磁気コアのＨ−Ｂ特性に、きわめて微
小量ながら原点のゆらぎ現象のあることが知られ
ている。このゆらぎの原因は正確には究明されて
いないが、環境の温度変化がその要因のひとつで
あることが知られている。そのため、例えば航空
機による潜水艦の探査、地中埋蔵金属の探査、地
磁気の異常変化など磁気の微小な変化を検出しよ
うとすれば、磁気センサーの温度を一定に制御す
ることが重要になる。 Flux gate type magnetic detectors, which are widely used as magnetic detectors, are equipped with a magnetic core, but it is known that the H-B characteristic of this magnetic core has a phenomenon of origin fluctuation, albeit a very small amount. ing. Although the exact cause of this fluctuation has not been determined, it is known that environmental temperature changes are one of the causes. For this reason, it is important to control the temperature of the magnetic sensor at a constant level, for example, when attempting to detect minute changes in magnetism, such as by aircraft searching for submarines, searching for underground metals, or abnormal changes in the geomagnetic field.
ところが、フラツクス・ゲート型磁気検出器の
温度効果は不確定要因が多く、設計的に所定の温
度特性の温度補償素子を用いて補償することは殆
んど不可能であり、さらに、温度制御用ヒータの
電流に含まれるノイズや、ヒータ電流がつくる磁
場が磁気センサーに影響を支えるので、高感度磁
気検出器には温度制御装置が使用できないという
問題があつた。 However, the temperature effect of flux-gate magnetic detectors has many uncertain factors, and it is almost impossible to compensate for it using a temperature compensation element with a predetermined temperature characteristic in terms of design. Because the noise contained in the heater current and the magnetic field created by the heater current affect the magnetic sensor, there was a problem in that a temperature control device could not be used with a highly sensitive magnetic detector.
本考案はこのような問題を解決し、磁気測定に
影響を与えることなく温度を所定値に制御し、セ
ンサーのゆらぎ現象を可及的に小さく抑えた磁気
検出器の提供を目的とする。 The present invention aims to solve these problems and provide a magnetic detector that can control the temperature to a predetermined value without affecting magnetic measurement and suppress sensor fluctuation as much as possible.
以下、本発明の実施例を図面に基づいて説明す
る。図において破線で囲まれた部分６が磁気検出
器のセンサー部である。センサーは２つの高透磁
率磁心１０と、それに巻回された１次コイル８、
２次コイル９、および互に逆位相に巻回されたヒ
ータ巻線７および７′から構成されている。１次
コイル８には磁心１０をその磁気飽和点に達する
まで磁化するに要する交流電流が発振器１より供
給されており、また少なくとも１次コイル８に流
れている交流の第２次高調波成分を含んだ２次コ
イルの出力は、公知の増幅器および同期整流器か
なる電子回路部分１１に送られ磁気検出信号Ｓが
取り出される。 Embodiments of the present invention will be described below based on the drawings. In the figure, a portion 6 surrounded by a broken line is the sensor section of the magnetic detector. The sensor includes two high permeability magnetic cores 10, a primary coil 8 wound around them,
It consists of a secondary coil 9 and heater windings 7 and 7' wound in opposite phases. The primary coil 8 is supplied with alternating current from the oscillator 1 necessary to magnetize the magnetic core 10 until it reaches its magnetic saturation point, and at least the second harmonic component of the alternating current flowing through the primary coil 8 is supplied by the oscillator 1. The output of the included secondary coil is sent to an electronic circuit section 11 consisting of a known amplifier and synchronous rectifier, and a magnetic detection signal S is extracted.
上記ヒータ巻線７，７′は電流制御装置２を通
じて、上記１次コイル８の電源である発振器１に
接続されているので、そこに流れる電流は１次コ
イル８の電流と同位相であり、また上述のように
ヒータ巻線７，７′は互に逆位相に、即ち、無誘
導的に巻回されているので、ヒータ電流およびヒ
ータ電流の変化は、１次コイル８にも２次コイル
９にも全く影響を与えない。温度検出器５は磁気
検出器センサー６の温度を検出し、その出力は信
号比較回路装置４において、所定の温度に相当す
る電気信号と比較され、増幅器３で増幅された
後、ヒータ電流制御信号として上記電流制御装置
に送られ、センサー６の温度を常に所定の温度に
保つよう、上記ヒータ７，７′の電流を制御する。 The heater windings 7, 7' are connected to the oscillator 1, which is the power source of the primary coil 8, through the current control device 2, so the current flowing therein is in the same phase as the current of the primary coil 8. Furthermore, as mentioned above, since the heater windings 7 and 7' are wound in opposite phases to each other, that is, in a non-inductive manner, changes in the heater current and the heater current also affect the primary coil 8 and the secondary coil. 9 has no effect at all. The temperature detector 5 detects the temperature of the magnetic detector sensor 6, and its output is compared with an electric signal corresponding to a predetermined temperature in the signal comparison circuit device 4, and after being amplified by the amplifier 3, a heater current control signal is generated. The current is sent to the current control device, and the current of the heaters 7, 7' is controlled so as to keep the temperature of the sensor 6 at a predetermined temperature.
以上のように本考案によれば、ヒータ専用電源
からのノイズやヒータ電流からの誘導性ノイズの
影響を受けることなく有効に温度制御された磁気
検出器が得られる。 As described above, according to the present invention, it is possible to obtain a magnetic detector whose temperature is effectively controlled without being affected by noise from the heater-dedicated power supply or inductive noise from the heater current.
なお本考案の他の実施例としてヒータ線の代り
に半導体発熱体を使用することも可能であり、ま
たヒータ線の材料に抵抗温度係数の大きい物質を
採用することにより上記の温度検出器５、信号比
較回路装置４、増幅器３、および電流制御装置２
から成るヒータ電流制御手段を排し、ヒータ自体
の温度特性により自己電流制御を行わせることも
できる。 In addition, as another embodiment of the present invention, it is also possible to use a semiconductor heating element instead of the heater wire, and by using a material with a large temperature coefficient of resistance as the material of the heater wire, the above-mentioned temperature detector 5, Signal comparison circuit device 4, amplifier 3, and current control device 2
It is also possible to eliminate the heater current control means consisting of the heater current control means and perform self-current control based on the temperature characteristics of the heater itself.
図面は本考案実施例の回路構成図である。
１……発振器、２……電流制御装置、３……増
幅器、４……信号比較回路装置、５……温度検出
器、６……磁気検出器のセンサー部、７，７′…
…ヒーター巻線、８……１次コイル、９……２次
コイル、１０……磁心、１１……磁気検出器の電
子回路部分。
The drawing is a circuit diagram of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Oscillator, 2... Current control device, 3... Amplifier, 4... Signal comparison circuit device, 5... Temperature detector, 6... Sensor section of magnetic detector, 7, 7'...
... Heater winding, 8 ... Primary coil, 9 ... Secondary coil, 10 ... Magnetic core, 11 ... Electronic circuit part of magnetic detector.
Claims (1)
て、同磁気検出装置の磁気回路に無誘導的に巻回
されたヒーターと、上記磁気検出装置の温度を検
知する温度センサーと、所定の温度に対応した電
圧を出力する参照電圧供給電源と、上記ヒーター
に流すべき電流を、上記温度センサーの出力と上
記参照電圧供給電源の出力に差に基いて上記温度
センサーの出力が所定の値を保つよう制御する電
流制御回路とを有し、上記ヒーターが上記電流制
御回路を介して通電されるよう構成されているこ
とを特徴とする磁気検出器。 A flux gate type magnetic detection device, which includes a heater non-inductively wound around the magnetic circuit of the magnetic detection device, a temperature sensor that detects the temperature of the magnetic detection device, and a temperature sensor that detects the temperature of the magnetic detection device. A reference voltage supply power supply that outputs a voltage and a current to be passed through the heater are controlled so that the output of the temperature sensor maintains a predetermined value based on the difference between the output of the temperature sensor and the output of the reference voltage supply power supply. A magnetic detector comprising: a current control circuit, the heater being configured to be energized via the current control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1159982U JPS58114776U (en) | 1982-01-29 | 1982-01-29 | magnetic detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1159982U JPS58114776U (en) | 1982-01-29 | 1982-01-29 | magnetic detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58114776U JPS58114776U (en) | 1983-08-05 |
| JPH0240551Y2 true JPH0240551Y2 (en) | 1990-10-29 |
Family
ID=30024198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1159982U Granted JPS58114776U (en) | 1982-01-29 | 1982-01-29 | magnetic detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58114776U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4710742U (en) * | 1971-03-03 | 1972-10-07 |
-
1982
- 1982-01-29 JP JP1159982U patent/JPS58114776U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4710742U (en) * | 1971-03-03 | 1972-10-07 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58114776U (en) | 1983-08-05 |
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