JPS63250519A - Magnetizing device for magnetic scale - Google Patents

Magnetizing device for magnetic scale

Info

Publication number
JPS63250519A
JPS63250519A JP8509987A JP8509987A JPS63250519A JP S63250519 A JPS63250519 A JP S63250519A JP 8509987 A JP8509987 A JP 8509987A JP 8509987 A JP8509987 A JP 8509987A JP S63250519 A JPS63250519 A JP S63250519A
Authority
JP
Japan
Prior art keywords
signal
magnetizing
magnetization
frequency
magnetic
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
Application number
JP8509987A
Other languages
Japanese (ja)
Inventor
Hisao Oshima
久男 大島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
I Pex Inc
Original Assignee
Dai Ichi Seiko Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dai Ichi Seiko Co Ltd filed Critical Dai Ichi Seiko Co Ltd
Priority to JP8509987A priority Critical patent/JPS63250519A/en
Publication of JPS63250519A publication Critical patent/JPS63250519A/en
Pending legal-status Critical Current

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  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

PURPOSE:To perform magnetization with high resolution so that the position accuracy of magnetic poles is good by controlling a magnetizing power source with the output of a reference encoder. CONSTITUTION:The reference encoder 8 has a zero signal for generating one pulse corresponding to each round and an incremental signal obtained by dividing one round equally. A shaft 7 is rotated by a motor 9 and when the zero signal is generated, a controller 10 starts counting with a 1st incremental signal generated after the zero signal is generated. Then the incremental signal which begins to be counted is frequency-divided at a prescribed frequency division ratio through the frequency divider 10-1 of the controller 10 to output a frequency-divided signal. Then the magnetization power source 11 outputs a magnetizing current to an exciting coil 13 with the frequency-divided signal output in synchronism with it. Consequently, the magnetization wherein the positions of respective phases are coincident completely is easily performed.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は磁気式エンコーダーに関し、その磁気目盛りを
着磁する着磁装置に関する。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a magnetic encoder, and more particularly to a magnetizing device for magnetizing the magnetic scale thereof.

従来、インクリメンタル形の磁気式エンコーダーには、
例えば第2図の磁気ドラム(ローター)2の外観図のよ
うに、インクリメンタル用信号として用いられる磁気ト
ラック1が、回転するローター2の周全面に着磁されて
いる。
Traditionally, incremental magnetic encoders have
For example, as shown in the external view of a magnetic drum (rotor) 2 in FIG. 2, a magnetic track 1 used as an incremental signal is magnetized over the entire circumference of a rotating rotor 2.

この着磁のための装置は第5図に示すような磁極数と同
数のヨーク3を設け、且つ、ヨーク3の設置ピッチを磁
極のピンチと一致させておくものが知られている。しか
し、この方法では可能な最小ピッチはQ、5mm程度が
限界であった。
A device for this magnetization is known, as shown in FIG. 5, which is provided with the same number of yokes 3 as the number of magnetic poles, and in which the installation pitch of the yokes 3 is made to match the pinch of the magnetic poles. However, with this method, the minimum possible pitch was limited to Q, about 5 mm.

そこで、これより小さいピッチで磁極を配列するために
、例えば第6図示の着磁装置が使用されている。この装
置は、ローター2を同期装置14により回転制御される
ステッピングモータ4で間歇回転させ、同時に着磁電源
5を動作させて単一のヨーク6でローター2上に所要ピ
ッチで磁極を一個ずつ着磁して行くものである。
Therefore, in order to arrange the magnetic poles at a pitch smaller than this, for example, a magnetizing device shown in FIG. 6 is used. This device rotates a rotor 2 intermittently by a stepping motor 4 whose rotation is controlled by a synchronizer 14, and at the same time operates a magnetizing power supply 5 to attach magnetic poles one by one on the rotor 2 at a required pitch using a single yoke 6. It is something that is magnetized.

(発明が解決しようとする問題点) しかるに、上述の着磁装置には次のような欠点がある。(Problem to be solved by the invention) However, the above magnetizing device has the following drawbacks.

l)ステッピングモータ4には分解能に限度があり、高
分解能の着磁は不可能である。
l) The stepping motor 4 has a limited resolution, and high-resolution magnetization is impossible.

2)停止位置が安定するまでに時間がかがり、全体とし
ての回転数が遅くなるために着磁に要する時間が長くな
る。
2) It takes time for the stop position to become stable, and the overall rotational speed becomes slower, so the time required for magnetization becomes longer.

3)停止位置精度が悪いために、磁極の位置精度も悪く
なる。
3) Since the stop position accuracy is poor, the magnetic pole position accuracy is also poor.

したがって、本発明は上述の問題を解決して、高分解能
で磁極の位置精度の良い着磁が可能な磁気目盛の着磁装
置を提供することを目的とする。
SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems and provide a magnetizing device for a magnetic scale capable of magnetizing with high resolution and high positional accuracy of magnetic poles.

(問題を解決するための手段) 上述の目的を達成するために、本発明の着磁装置は、被
着磁体としての磁気ドラム(ローター)2と同期回転可
能に連結された基準エンコーダー8と、この基?2エン
コーダー8の出力により着磁電源11を制御する制御器
10とを設けたものである。
(Means for Solving the Problem) In order to achieve the above-mentioned object, the magnetizing device of the present invention includes a reference encoder 8 that is rotatably connected to a magnetic drum (rotor) 2 as a magnetized body, and This group? 2 and a controller 10 that controls the magnetizing power source 11 based on the output of the encoder 8.

(作用) 上述のように、磁気ドラム2への着磁位置は基準エンコ
ーダー8の出力により決まるものであるので、該エンコ
ーダ8の出力信号を細かく設定しておけば、高精度で位
置決めが可能であり、しかも、制御器10の制御により
回転しなから着磁が可能である。
(Function) As mentioned above, the magnetized position on the magnetic drum 2 is determined by the output of the reference encoder 8, so if the output signal of the encoder 8 is set finely, positioning can be performed with high precision. Moreover, magnetization is possible without rotation under the control of the controller 10.

(実施例) 第1図は本発明に係る磁気目盛の着磁装置の一例の構成
図である。この場合、ローター2は軸7で基準エンコー
ダー8と直結しである。しかし、この連結は直結でなく
ても、例えばカップリング等の同期回転が確保出来るも
のであれば、他の方法でも差し支えない。また、上記軸
7は例えばプーリーとベルト等の伝導手段によりモータ
9で回転される。従ってロークー2と基準エンコーダー
8とは完全に同一回転速度で回転する。ところで、この
基準エンコーダー8の出力信号は制御器10に入力し、
該制御器lOの出力信号は制御信号として着磁電源11
に入力する。一方、ローター2の部分には着磁用のヨー
ク12とその励磁コイル13がローター2の磁気トラッ
ク1に接して設けである。この励磁コイル13は上記着
磁電源11で励磁される。
(Example) FIG. 1 is a configuration diagram of an example of a magnetizing device for a magnetic scale according to the present invention. In this case, the rotor 2 is directly connected to the reference encoder 8 via the shaft 7. However, this connection does not have to be a direct connection; other methods such as couplings may be used as long as synchronous rotation can be ensured. Further, the shaft 7 is rotated by a motor 9 using transmission means such as a pulley and a belt. Therefore, the rotary encoder 2 and the reference encoder 8 rotate at completely the same rotational speed. By the way, the output signal of this reference encoder 8 is input to the controller 10,
The output signal of the controller IO is used as a control signal by the magnetizing power supply 11.
Enter. On the other hand, a magnetizing yoke 12 and its excitation coil 13 are provided in contact with the magnetic track 1 of the rotor 2 in the rotor 2 portion. This excitation coil 13 is excited by the magnetizing power supply 11 described above.

次に上記装置の動作について説明する。Next, the operation of the above device will be explained.

前記基準エンコーダー8には、1周で1パルスの信号を
出すゼロ信号と、1周を等分したインクリメンタル信号
を備えたものを使用する。
The reference encoder 8 is equipped with a zero signal that outputs a signal of one pulse in one revolution, and an incremental signal that divides one revolution into equal parts.

この動作は第3図示のタイミング説明図のように、 ■)モータ9により軸7を回転させ、同図(イ)示のゼ
ロ信号が発生したら、(ロ)示のインクリメンタル信号
のうち、ゼロ信号発生後に発生する最初のインクリメン
タル信号から制御器1oにより計数を始める。
This operation is performed as shown in the timing explanatory diagram shown in Figure 3. (2) When the shaft 7 is rotated by the motor 9 and the zero signal shown in (A) is generated, the zero signal of the incremental signal shown in (B) is generated. The controller 1o starts counting from the first incremental signal generated after the generation.

2)上記計数開始したインクリメンタル信号を制御器l
Oの分周器10−1で規定の分周比で分周し、(ハ)示
のような分周信号出力とする。(同図では分周比は1/
4) 3)上記分周信号出力により、これと同期して着磁電源
11から(ニ)示のように着磁電流を励磁コイル13に
出力する。
2) The incremental signal that started the above counting is sent to the controller l.
The frequency is divided by a specified frequency division ratio by the frequency divider 10-1 of 0, and the frequency division signal as shown in (c) is output. (In the figure, the division ratio is 1/
4) 3) By outputting the frequency division signal, a magnetizing current is outputted from the magnetizing power supply 11 to the excitation coil 13 as shown in (d) in synchronization with this.

また、第4図は、上記実施例のローター2に代えて、多
相トラックのローター15の各相に磁気目盛を形成する
他の例を示しているが、この場合は、図示しないヨーク
をローター15の各相に対応して配設し、上記の場合と
同様にして制御器10がら分周比の異なる信号を出力し
て各ヨークの励磁コイルに着磁信号を出力する。これに
よって、各相の位置が完全に一致した状態での着磁を容
易に行うことが出来る。この例によれば、3ビツトの信
号を形成するローター15として使用し得る。
Further, FIG. 4 shows another example in which a magnetic scale is formed on each phase of the rotor 15 of a multi-phase track instead of the rotor 2 of the above embodiment, but in this case, a yoke (not shown) is attached to the rotor. Similarly to the above case, the controller 10 outputs signals with different frequency division ratios to output magnetization signals to the excitation coils of each yoke. Thereby, it is possible to easily perform magnetization in a state where the positions of each phase are completely matched. According to this example, the rotor 15 can be used to form a 3-bit signal.

さらに、図示しないが、微小ピッチで磁極を形成する場
合、ヨークの起磁力を大きくして一度に飽和磁束密度で
着磁を行うと、直前に着磁した磁極に対して脱磁作用が
及び、該直前の磁極の残留磁は順次起磁力を弱めながら
同一着磁極に対し、複数回繰り返して着磁することが行
われる。本発明の着磁装置によれば、このような同一磁
極への繰り返し着磁を行う場合に、繰り返し着磁位置が
ずれることがないので、極めて有効である。
Furthermore, although not shown, when forming magnetic poles at minute pitches, if the magnetomotive force of the yoke is increased and magnetization is performed at once at saturation magnetic flux density, a demagnetizing effect will be exerted on the previously magnetized magnetic pole. The same magnetized pole is repeatedly magnetized a plurality of times while sequentially weakening the magnetomotive force of the residual magnetization of the immediately preceding magnetic pole. According to the magnetizing device of the present invention, when repeatedly magnetizing the same magnetic pole as described above, the magnetized position does not shift repeatedly, so it is extremely effective.

なお、上述実施例においては、被着磁体がローターであ
る場合を説明したが、リニアな被着磁体についても、例
えば基準エンコーダーに対し、ランク、摩擦車等を用い
ることによって同期移動させ、同様に着磁を行わせるこ
とが出来る。
In the above embodiment, the case where the magnetized body is a rotor has been explained, but a linear magnetized body can also be moved synchronously with respect to a reference encoder, for example, by using a rank, a friction wheel, etc. It can be magnetized.

また、着磁用のヨークを一極とせず、磁気目盛ピンチよ
りも大きい間隔で複数極配設し、全磁気目盛の半分以下
の移動量で被着磁体の着磁を行うことも可能である。
In addition, instead of using a single pole for the magnetizing yoke, it is also possible to arrange multiple poles at intervals larger than the magnetic scale pinch, and magnetize the object to be magnetized with a movement amount of less than half of the total magnetic scale. .

(発明の効果) 本発明によれば上述のように、着磁□のタイミングは基
準エンコーダー8により規制されているので、着磁の位
置精度が高く、細かいピッチの磁気目盛の作成が可能で
あり、また多相磁気トラックへの相互記録も位置精度よ
く一致させることが可能である。
(Effects of the Invention) According to the present invention, as described above, the timing of magnetization □ is regulated by the reference encoder 8, so the positional accuracy of magnetization is high and it is possible to create magnetic scales with fine pitches. , it is also possible to mutually record on multiphase magnetic tracks with high positional accuracy.

また、着磁位置の割出し精度が高くとれるため、ロータ
ー2の同じ位置に反復着磁が可能であり、微小ピッチで
の各磁極の反復着磁による残留磁気強度を容易に飽和値
まで強化することが可能である等のほか、さらに、ステ
ッピングモータ4の場合のように、その都度停止させる
必要がないので、全体としての着磁速度の高速化が可能
である等の大きな特徴を有している。、
In addition, since the indexing accuracy of the magnetization position is high, it is possible to repeatedly magnetize the same position on the rotor 2, and the residual magnetic strength can be easily strengthened to the saturation value by repeatedly magnetizing each magnetic pole at a minute pitch. In addition, it has other major features such as being able to increase the overall magnetization speed since there is no need to stop it each time as in the case of the stepping motor 4. There is. ,

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明に係る磁気目盛の着磁装置の構成図、第
2図は磁気ドラム(ローター)の外観図、第3図は着磁
動作のタイミング説明図、第4図は多相磁気トラックロ
ークーの説明図、第5図は従来の着磁装置の部分説明図
、第6図は従来の回転着磁装置の構成図である。 2:磁気ドラム(ローター)、 8:基準エンコーダー
、 lO:制御器、 11:着磁電源。 箋1自 喜2目
Fig. 1 is a configuration diagram of a magnetizing device for a magnetic scale according to the present invention, Fig. 2 is an external view of a magnetic drum (rotor), Fig. 3 is an explanatory diagram of the timing of magnetizing operation, and Fig. 4 is a multiphase magnetic FIG. 5 is a partial explanatory diagram of a conventional magnetizing device, and FIG. 6 is a configuration diagram of a conventional rotary magnetizing device. 2: Magnetic drum (rotor), 8: Reference encoder, IO: Controller, 11: Magnetizing power supply. Note 1 Jiki 2

Claims (1)

【特許請求の範囲】[Claims] 磁気目盛の着磁装置において、被着磁体と同期移動可能
に連結された基準エンコーダーと、この基準エンコーダ
ーの出力により着磁電源を制御する制御器とを設けたこ
とを特徴とする磁気目盛の着磁装置。
A magnetizing device for a magnetic scale, characterized by comprising a reference encoder connected to be movable in synchronization with a magnetized body, and a controller for controlling a magnetizing power source based on the output of the reference encoder. Magnetic device.
JP8509987A 1987-04-06 1987-04-06 Magnetizing device for magnetic scale Pending JPS63250519A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8509987A JPS63250519A (en) 1987-04-06 1987-04-06 Magnetizing device for magnetic scale

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8509987A JPS63250519A (en) 1987-04-06 1987-04-06 Magnetizing device for magnetic scale

Publications (1)

Publication Number Publication Date
JPS63250519A true JPS63250519A (en) 1988-10-18

Family

ID=13849163

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8509987A Pending JPS63250519A (en) 1987-04-06 1987-04-06 Magnetizing device for magnetic scale

Country Status (1)

Country Link
JP (1) JPS63250519A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011043492A (en) * 2009-06-01 2011-03-03 Magna-Lastic Devices Inc Magnetic speed sensor, and method for manufacturing the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011043492A (en) * 2009-06-01 2011-03-03 Magna-Lastic Devices Inc Magnetic speed sensor, and method for manufacturing the same

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