JPH0134329B2 - - Google Patents
Info
- Publication number
- JPH0134329B2 JPH0134329B2 JP57086293A JP8629382A JPH0134329B2 JP H0134329 B2 JPH0134329 B2 JP H0134329B2 JP 57086293 A JP57086293 A JP 57086293A JP 8629382 A JP8629382 A JP 8629382A JP H0134329 B2 JPH0134329 B2 JP H0134329B2
- Authority
- JP
- Japan
- Prior art keywords
- head
- magnetic
- core
- magnetic head
- channel
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Description
【発明の詳細な説明】
本発明は磁気ヘツド装置、特に複合多重空隙磁
束応答型磁気ヘツド装置の改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in magnetic head devices, and more particularly to complex multi-air gap flux responsive magnetic head devices.
磁気スケールの磁化パターンを検出し、これを
電気信号に変換するには、一般に磁束応答型の多
重空隙磁気ヘツドが使用される。この磁気ヘツド
は磁気スケールの方向を弁別するため、あるいは
記録波長内の内挿のために通常は２チヤンネル構
成をとるが、その場合、チヤンネル間の中心距離
ｈがｈ＝（ｍ±1/4）λ（ｍ：整数、λ：記録波長）
となるように２チヤンネルのヘツドを配設する。 A flux-responsive, multi-air gap magnetic head is commonly used to detect the magnetization pattern of a magnetic scale and convert it into an electrical signal. This magnetic head usually has a two-channel configuration in order to discriminate the direction of the magnetic scale or for interpolation within the recording wavelength, but in that case, the center distance h between the channels is )λ (m: integer, λ: recording wavelength)
A two-channel head is arranged so that
而して従来の上述した２チヤンネル構成の磁気
ヘツドは第１図に示す如く各チヤンネルに、励磁
部１，２と信号コイル３，４を設けると共に夫々
のヘツドの磁束量を信号コイル３，４で検出し、
電圧変換した後、補償回路５，６及び増幅器７，
８を介して混合回路９によつて各出力信号を電圧
加算してから帯域濾波器１０を通して所期の検出
信号を得るようになつている。 As shown in FIG. 1, the conventional magnetic head with the two-channel configuration described above is provided with excitation sections 1 and 2 and signal coils 3 and 4 in each channel, and the magnetic flux of each head is controlled by the signal coils 3 and 4. Detected with
After voltage conversion, compensation circuits 5, 6 and amplifiers 7,
Each output signal is voltage-added by a mixing circuit 9 via a filter 8, and then passed through a bandpass filter 10 to obtain a desired detection signal.
しかるに、この場合、前述したようにチヤンネ
ル間の位相は90゜としなければならないため、従
来は各チヤンネルの磁気ヘツドを単体で組立て、
その後で90゜±15゜の位相範囲内になるように、チ
ヤンネル間にスペーサを介在せしめて、位置調整
してから、電気的処理を施して90゜の位相となる
ように調整していた。なお、PHは移相器、OCS
は発振器である。 However, in this case, as mentioned above, the phase between the channels must be 90°, so conventionally the magnetic head of each channel was assembled singly.
Thereafter, a spacer was inserted between the channels to adjust the position so that the phase was within a 90° ±15° phase range, and then electrical processing was performed to adjust the phase to 90°. Note that PH is a phase shifter, OCS
is an oscillator.
しかしこのような位相調整は面倒かつ非能率的
であり、製造コスト低減の阻害要因となつてい
た。また各磁気ヘツドの出力差、特性差も大き
く、更には90゜の位相の誤差範囲も大きい欠点が
あつた。 However, such phase adjustment is troublesome and inefficient, and has been an impediment to reducing manufacturing costs. Furthermore, there were drawbacks such as large differences in output and characteristics between each magnetic head, and also a large error range in the 90° phase.
本発明はかかる従来技術の欠点を改良するため
になされたもので、励磁コイルが巻装された可飽
和コアを有し、各チヤンネルのヘツドコア及びス
ペーサを交互に積層配列したヘツドコア積層体に
対し、信号コイルを巻装した磁気ヨークを、各チ
ヤンネルのヘツドコアによる磁束が上記信号コイ
ルにおいて加算されるように配設したことを特徴
とする。 The present invention has been made to improve the drawbacks of the prior art, and is directed to a head core laminate having a saturable core wound with an excitation coil, and in which head cores and spacers of each channel are alternately stacked. The present invention is characterized in that a magnetic yoke around which a signal coil is wound is arranged so that the magnetic fluxes generated by the head core of each channel are added in the signal coil.
以下図面に示す実施例を参照して説明すると、
第２図ａにおいて、１１及び１２はチヤンネル１
及びチヤンネル２の磁気ヘツドを構成するヘツド
コア積層体で、第２図ｂに示す如く、ヘツドコア
Ａ，Ａ……，Ｂ，Ｂ……，，……，，…
…の夫々がスペーサＳ，Ｓ……を介してその積層
方向の両側に交互に相対するように組み合わされ
ている。 The following will be explained with reference to the embodiments shown in the drawings.
In Figure 2a, 11 and 12 are channel 1
and a head core laminate forming the magnetic head of channel 2, as shown in FIG. 2b, head cores A, A..., B, B...,,...,,...
... are combined so as to alternately face each other on both sides in the stacking direction via spacers S, S, ....
１３は信号コイル１４を巻装した磁気ヨーク
で、１５は励磁コイル１６を巻装した可飽和コア
であり、可飽和コア１５は磁気ヨーク１３の外側
に設けられており、特に本発明においては磁気ヨ
ーク１３が、各チヤンネルのヘツドコアによる磁
束が上記信号コイル１４において加算されるよう
に配設されている。 13 is a magnetic yoke around which a signal coil 14 is wound; 15 is a saturable core around which an excitation coil 16 is wound; the saturable core 15 is provided outside the magnetic yoke 13; A yoke 13 is arranged so that the magnetic fluxes from the head cores of each channel are added at the signal coil 14.
１７はロツドスケール１８の貫通孔であり、従
つて本実施例の多重空隙磁気ヘツドは上記スケー
ルの走行方向に対して同軸型直列配置の構成とな
つていて、磁気ヨーク１３はチヤンネル１，２に
共用される。このため信号コイル１４においてチ
ヤンネル１と２の磁束が加算される構造となるの
で、第４図に示すように回路構成が従来よりもほ
ぼ半減する。 Reference numeral 17 denotes a through hole in the rod scale 18. Therefore, the multi-gap magnetic head of this embodiment is arranged coaxially in series with respect to the running direction of the scale, and the magnetic yoke 13 is shared by channels 1 and 2. be done. Therefore, the signal coil 14 has a structure in which the magnetic fluxes of channels 1 and 2 are added, so that the circuit configuration is reduced by approximately half compared to the conventional one, as shown in FIG.
即ち、同図から明らかなように、１個の信号コ
イル１４からの検出出力は補償回路５′、増幅器
７′を介して帯域濾波器１０′に与えられる。 That is, as is clear from the figure, the detection output from one signal coil 14 is applied to a bandpass filter 10' via a compensation circuit 5' and an amplifier 7'.
第３図は上記ヘツドコアの積層順序を例示して
おり、X1〜X4に示すヘツドコアの配列はスケー
ルの磁化パターンＭを検出すべくチヤンネル１と
チヤンネル２を交互に隣接させ複数の組み合わせ
を作つたものである。 FIG. 3 exemplifies the order in which the head cores are laminated, and the arrangement of the head cores shown in X 1 to X 4 is such that channels 1 and 2 are alternately adjacent to each other to create a plurality of combinations in order to detect the magnetization pattern M of the scale. It is ivy.
上記配列のうち、特にX2及びX4の配列により
構成された磁気ヘツドは各ヘツドコアが前述した
ように積層方向の両側で交互に相対するように組
み合わされるので、前記位相が90゜±2゜の範囲に
入るように容易に組み立てることができ、また出
力もチヤンネル１と２で同等になる。 Among the above-mentioned arrangements, in particular, the magnetic heads constituted by the arrangement of X 2 and It can be easily assembled to fit within the range of , and the output will be the same for channels 1 and 2.
第５図ａ及びｂは夫々従来及び本発明の多重空
隙磁気ヘツドの出力位相特性を示すリサージユ波
形の実測図で、従来のものａでは90゜±15゜の精度
しか得られないのに対し本発明のものｂによるを
90゜±2゜程度の高精度を容易に達成し得る。 Figures 5a and 5b are actual measurement diagrams of litharge waveforms showing the output phase characteristics of the conventional multi-gap magnetic head and the present invention, respectively.The conventional type a can only obtain an accuracy of 90°±15°, while the present invention According to invention b
High accuracy of about 90°±2° can be easily achieved.
以上説明したように本発明によれば、コアの一
体積層構造をなす多重空隙磁気ヘツドにおいて、
チヤンネル１，２に共用される磁気ヨークに信号
コイルを巻装し、この信号コイルにおいてチヤン
ネル１，２の磁束が加算されるように構成したの
で、検出回路が従来に比してほぼ半減し、小型化
に寄与する所大であり、しかも90゜の位相に対す
る誤差範囲が狭くできるから、この点からも検出
回路の負担が少なくなり、低コスト化の面でも有
利である。 As explained above, according to the present invention, in a multi-gap magnetic head having a single layered core structure,
A signal coil is wound around the magnetic yoke shared by channels 1 and 2, and the magnetic fluxes of channels 1 and 2 are added together in this signal coil, so the detection circuit is reduced by almost half compared to the conventional system. This greatly contributes to miniaturization, and since the error range for a 90° phase can be narrowed, the burden on the detection circuit is reduced from this point of view as well, which is advantageous in terms of cost reduction.
第１図は従来の多重空隙磁気ヘツド用の検出回
路の構成を示すブロツク図、第２図ａ及びｂは
夫々本発明の一実施例を示す斜視図及び分解図、
第３図は本発明の多重空隙磁気ヘツドにおけるヘ
ツドコアの積層配列構造を例示する図、第４図は
本発明の多重空隙磁気ヘツド用の検出回路の構成
を示すブロツク図、第５図ａ及びｂは夫々従来及
び本発明の多重空隙磁気ヘツドの出力位相特性を
示すリサージユ波形の実測である。
１１，１２……ヘツドコア積層体、１３……磁
気ヨーク、１４……信号コイル、１５……可飽和
コア、１６……励磁コイル。
FIG. 1 is a block diagram showing the configuration of a conventional detection circuit for a multi-gap magnetic head, and FIGS. 2a and 2b are a perspective view and an exploded view showing an embodiment of the present invention, respectively.
FIG. 3 is a diagram illustrating the laminated arrangement structure of the head core in the multi-gap magnetic head of the present invention, FIG. 4 is a block diagram showing the configuration of a detection circuit for the multi-gap magnetic head of the present invention, and FIGS. 5 a and b are actual measurements of resurge waveforms showing the output phase characteristics of the conventional multi-gap magnetic head and the present invention, respectively. 11, 12...Head core laminate, 13...Magnetic yoke, 14...Signal coil, 15...Saturable core, 16...Excitation coil.
Claims (1)
互に積層配列したヘツドコア積層体と、信号コイ
ルを巻装し上記ヘツドコア積層体に組込んだ磁気
ヨークと、励磁コイルを巻装した可飽和コアとを
有し、上記可飽和コアは磁気ヨークの外側にくる
ように上記ヘツドコア積層体に取り付けた磁気ヘ
ツドにおいて、上記磁気ヨークが上記ヘツドコア
積層体に組込まれた状態において、各チヤンネル
のヘツドコアから発生される磁束が上記信号コイ
ルにおいて加質されるように配置されたことを特
徴とする磁気ヘツド装置。1. A head core laminate in which two channels of head cores and spacers are alternately stacked, a magnetic yoke around which a signal coil is wound and incorporated into the head core laminate, and a saturable core around which an excitation coil is wound, In a magnetic head in which the saturable core is attached to the head core laminate so that it is located outside the magnetic yoke, the magnetic flux generated from the head core of each channel is 1. A magnetic head device characterized in that the magnetic head device is arranged so that a signal coil is heated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8629382A JPS58202821A (en) | 1982-05-21 | 1982-05-21 | Magnetic head device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8629382A JPS58202821A (en) | 1982-05-21 | 1982-05-21 | Magnetic head device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58202821A JPS58202821A (en) | 1983-11-26 |
| JPH0134329B2 true JPH0134329B2 (en) | 1989-07-19 |
Family
ID=13882785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8629382A Granted JPS58202821A (en) | 1982-05-21 | 1982-05-21 | Magnetic head device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58202821A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62143204U (en) * | 1986-03-05 | 1987-09-09 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS533053U (en) * | 1976-06-26 | 1978-01-12 | ||
| JPS5587006A (en) * | 1978-12-26 | 1980-07-01 | Sony Corp | Magnetic flux response type magnetic head |
| JPS564843A (en) * | 1979-06-22 | 1981-01-19 | Nec Corp | Address conversion system |
| JPS57137812A (en) * | 1981-02-20 | 1982-08-25 | Sony Magnescale Inc | Magnetic flux response type multigap head for coaxial type magnetic scale |
-
1982
- 1982-05-21 JP JP8629382A patent/JPS58202821A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58202821A (en) | 1983-11-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0134329B2 (en) | ||
| JPS63187159A (en) | Current detector | |
| JPS6157809A (en) | Magnetic flux response type multigap head | |
| JPH0894728A (en) | Magnetic field sensor and method of manufacturing magnetic field sensor | |
| JPS6225969B2 (en) | ||
| JPS5912761Y2 (en) | magnetic head | |
| JPH041455Y2 (en) | ||
| JPH0429375Y2 (en) | ||
| JP2000306752A (en) | Rotary transformer | |
| JPH0624732Y2 (en) | Differential transformer | |
| JPH05322934A (en) | Current detector | |
| JPH0325283Y2 (en) | ||
| JPS633134Y2 (en) | ||
| JPH0548241Y2 (en) | ||
| JPS608557Y2 (en) | stepping motor | |
| JPS6316016Y2 (en) | ||
| JPH068735B2 (en) | Magnetic head | |
| JPS6021768Y2 (en) | displacement converter | |
| JPS6145679Y2 (en) | ||
| JPS6053448B2 (en) | differential transformer | |
| SU991197A1 (en) | Magnetoelastic transducer of force | |
| JPH0745023Y2 (en) | Clamp sensor | |
| JPH0424070U (en) | ||
| JPH0351704Y2 (en) | ||
| JPH04105071A (en) | Current detector |