JPS636417A - Rotational position detecting device - Google Patents
Rotational position detecting deviceInfo
- Publication number
- JPS636417A JPS636417A JP14936886A JP14936886A JPS636417A JP S636417 A JPS636417 A JP S636417A JP 14936886 A JP14936886 A JP 14936886A JP 14936886 A JP14936886 A JP 14936886A JP S636417 A JPS636417 A JP S636417A
- Authority
- JP
- Japan
- Prior art keywords
- light receiving
- light
- angle
- output
- output voltage
- 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
Links
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 230000007423 decrease Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 23
- 238000000034 method Methods 0.000 description 11
- 238000004804 winding Methods 0.000 description 6
- 108091008695 photoreceptors Proteins 0.000 description 5
- 230000007704 transition Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 235000008753 Papaver somniferum Nutrition 0.000 description 1
- 240000001090 Papaver somniferum Species 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Optical Transform (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、光を利用して回転体の位置を回転角度の関
数として検出する検出装置の改良に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a detection device that uses light to detect the position of a rotating body as a function of rotation angle.
従来、この種の装置としては種々のものが提案されてお
り、例えば正弦または余弦関数で検出するものとして、
電磁結合を利用したレゾルバ等のシンクロ電機がある。Conventionally, various devices of this type have been proposed, such as those that detect using a sine or cosine function,
There are synchro electric machines such as resolvers that utilize electromagnetic coupling.
第２図はレゾルバの原理を示す原理構成図、第２Ａ図は
その動作を説明するための波形図である。FIG. 2 is a principle configuration diagram showing the principle of the resolver, and FIG. 2A is a waveform diagram for explaining its operation.
第２図に示す如く、レゾルバはそれぞれ巻線を持った固
定子１０と回転子１１とからなり、回転子１１は図示さ
れない回転体に取り付けられる。As shown in FIG. 2, the resolver consists of a stator 10 and a rotor 11, each having a winding, and the rotor 11 is attached to a rotating body (not shown).
したがって、回転体の回転に応じてこれら２つの巻線間
の結合の度合が変化するが、と〜ではその結合係数と固
定子の基準軸から見た回転子の機械的な角度θ（回転体
の位置）に対し、以下の如く正弦または余弦関数となる
ようにしている。Therefore, the degree of coupling between these two windings changes according to the rotation of the rotating body. position), it is made to be a sine or cosine function as shown below.
いま、固定子巻線を第２Ａ図（イ）に示す如きＶＢ （
＝ ＶＯ５１ｆｌωｔ）なる電圧で励磁すると、回転子
巻線には、
ｖＲ＝ ＶＯｃｏｓθ５ｉｎ（ｌａｌｔの如き振幅変調
された信号が出力される。こ〜で、ｄθ／ｄｔ＜＜ ω
とすると、上記ｖＲの波形は第２Ａ図（ロ）の如くなり
、Ｖｓによって同期整流を行なうと第２Ａ図（ハ）の如
き信号が得られる。次いで、ローパスフィルタ等により
この信号のω成分を除去すると、第２Ａ図（ニ）のよう
に、θの余弦信号を得ることができる。なお、回転子巻
線の空間的な配置を９０°変えることにより正弦信号と
して得ることができる。Now, the stator winding is VB (
When excited with a voltage of = VO51flωt), the rotor winding outputs an amplitude-modulated signal such as vR = VOcosθ5in (alt). Here, if dθ/dt<< ω, the waveform of vR above is The signal becomes as shown in Fig. 2A (b), and when synchronous rectification is performed using Vs, a signal as shown in Fig. 2A (c) is obtained.Next, when the ω component of this signal is removed by a low-pass filter etc., the signal shown in Fig. 2A ( A cosine signal of θ can be obtained as shown in (d).A sine signal can be obtained by changing the spatial arrangement of the rotor windings by 90 degrees.
しかしながら、このような方式には、
イ）固定子および回転子にそれぞれ巻線が必要となるた
め小型、軽量化に限度があり、比較的高価になる。However, in this type of system, (a) windings are required for the stator and rotor, so there is a limit to miniaturization and weight reduction, and it is relatively expensive.
口）電磁結合を利用しているため、搬送波となる励磁信
号が必要であり、また位置の正弦、余弦信号を得るため
に復調回路が必要となるので、検出器の電気回路部分が
複雑になる。Since it uses electromagnetic coupling, an excitation signal is required as a carrier wave, and a demodulation circuit is required to obtain the sine and cosine signals of the position, making the electrical circuit part of the detector complex. .
ハ）回転子の位置信号を非接触で得る方法も数多く提案
されているが、そのためにはいくつかの部品を付加する
必要があってその分だけ大きくなり、コスト高となる。C) Many methods have been proposed for obtaining rotor position signals without contact, but this requires the addition of several parts, which increases the size and cost.
等の難点がある。There are other difficulties.
そこで、出願人は光を利用して回転体の位置を回転角度
の関数として出力することにより、上記の如き難点を克
服する方式を提案している（以下、提案方式という。）
。Therefore, the applicant has proposed a method that overcomes the above-mentioned difficulties by outputting the position of the rotating body as a function of the rotation angle using light (hereinafter referred to as the proposed method).
.
第３図はかかる提案方式の原理を示す原理構成図、第３
Ａ図は第３図におけるじゃへい板の窓を通して観察され
る受光部分（露光部）の推移を説明するための参照図、
第３Ｂ図はその受光部の出力を示す波形図である。Figure 3 is a principle block diagram showing the principle of the proposed method.
Figure A is a reference diagram for explaining the transition of the light-receiving area (exposed area) observed through the window of the shroud in Figure 3;
FIG. 3B is a waveform diagram showing the output of the light receiving section.
第３図において、１は回転体（図示なし）の回転軸、２
は発光体、６はしやへい板、３１は光透過用窓、４は受
光体、４１は受光部である。すなわち、回転軸心を通る
所定の基準軸から回転角度にして１８０度分だけ光を透
過させる光透過用窓３１をもち、回転体の回転軸１に結
合されたじゃへい板３に対し、その−方何にはリング状
に形成されて平行光線を発するＬＥＤ（発光ダイオード
）の如き発光体２と、その他方側には例えば半円形状の
受光部４１をもつ受光体４とを同軸上に配置する。こ〜
で、発光体２および受光体４は固定して設置されており
、＠転するじゃへい板３と接触しないよう所定の間隔が
形成されている。In FIG. 3, 1 is the rotation axis of a rotating body (not shown), 2
6 is a light emitting body, 6 is a shield plate, 31 is a window for light transmission, 4 is a light receiving body, and 41 is a light receiving portion. That is, it has a light transmitting window 31 that transmits light by a rotation angle of 180 degrees from a predetermined reference axis that passes through the rotation axis, and has a light transmitting window 31 that transmits light by a rotation angle of 180 degrees from a predetermined reference axis that passes through the rotation axis. - On one side, a light emitting body 2 such as an LED (light emitting diode) that is formed in a ring shape and emits parallel light rays, and on the other side, a light receiving body 4 having, for example, a semicircular light receiving part 41, are arranged on the same axis. Deploy. child~
The light emitting body 2 and the light receiving body 4 are fixedly installed, and a predetermined interval is formed so that they do not come into contact with the rotating baffle plate 3.
したがって、回転体が回転するとじやへい板３もこれに
伴って回転し、これによってしやへい板５の窓３１から
見える受光部４１０部分、すなわち露光部分も変化する
。この露光部分の推移を示すのが第３Ａ図でちる。Therefore, when the rotating body rotates, the door and shield plate 3 also rotate, and as a result, the portion of the light receiving section 410 visible through the window 31 of the screen plate 5, that is, the exposed portion, also changes. FIG. 3A shows the transition of this exposed area.
いま、第３Ａ図（イ）の如く、固定的に設置される受光
体４の基準軸をα、回転するじゃへい板３の基準軸をβ
と定め、このα軸から見たβ軸の角度をθとすると、θ
ばしやへい板３の回転に伴って同図（イ）、（ロ）、（
）・）の如く変化する。Now, as shown in Fig. 3A (a), the reference axis of the fixedly installed photoreceptor 4 is α, and the reference axis of the rotating baffle plate 3 is β.
If the angle of the β axis seen from this α axis is θ, then θ
As the bashing plate 3 rotates, (a), (b), and (
)・).
ツマリ、しやへい板３のＣＣＷ（反時計回り）方向を正
とすると、これがθ−０からＣＣＷの方向へ回転するＫ
つれて、露光される受光部４１０部分が４１′１４１″
、４１″′の如く変化し、その面積Ｓがθに比例して増
加することがわかる。そして、θ＝πにおいてこの面積
Ｓは最大となり、θ〉πでは面積Ｓはθに比例して減少
し、θ＝２πでは零となる。Assuming that the CCW (counterclockwise) direction of the knob and shield plate 3 is positive, this rotates from θ-0 in the CCW direction.
As a result, the exposed portion of the light receiving section 410 is 41'141''
, 41''', and its area S increases in proportion to θ.Then, when θ=π, this area S becomes maximum, and when θ>π, the area S decreases in proportion to θ. However, it becomes zero when θ=2π.
とのθに対する面積Ｓの推移をグラフで示したのが第３
Ｂ図であり、同図の如く三角波となる。The third graph shows the change in area S with respect to θ.
This is diagram B, and it becomes a triangular wave as shown in the diagram.
こ〜で、受光部４１として例えばアモルファスシリコン
のように光量に比例した電圧を発生するような材料を使
用すれば、その発生電圧Ｖ。は露光される受光部４１の
面積Ｓに比例するので、同図の三角波はθと出力電圧Ｖ
。との関係を示すことにもなる。したがって、この出力
電圧Ｖ。を計測することにより回転体の位置を知ること
ができる、と云うのが提案方式の原理である。Here, if a material that generates a voltage proportional to the amount of light, such as amorphous silicon, is used as the light receiving section 41, the generated voltage V. is proportional to the area S of the exposed light receiving section 41, so the triangular wave in the figure is proportional to θ and the output voltage V.
. It also shows the relationship between Therefore, this output voltage V. The principle of the proposed method is that the position of the rotating body can be determined by measuring the .
第４図は提案方式の変形例を示す概要図、第４Ａ図は第
４図の出力を示す波形図である。FIG. 4 is a schematic diagram showing a modification of the proposed method, and FIG. 4A is a waveform diagram showing the output of FIG. 4.
これは、２つの受光部４２．４３を第３図と同じくしや
へい板３の窓３１から見た面積が角度θの正弦関数とな
るようにするとともに、互いに空間的に９０度ずらして
配置することにより、第４Ａ図の如く９０度の位相差を
もつ２相出力Ｖ１＋ｖ２を得るようにしたものである。This is done so that the area of the two light receiving sections 42 and 43 when viewed from the window 31 of the shingle plate 3 is a sine function of the angle θ, as shown in FIG. By doing so, a two-phase output V1+v2 having a phase difference of 90 degrees as shown in FIG. 4A is obtained.
しかしながら、このような提案方式では回転角度の一周
期と出力信号の一周期が等しく、例えば多極レゾルバと
してすでに実現されているような、機械的な回転角度に
対して１／ｎ（ｎ＝２、３・・・・・・）の周期をもつ
電気的信号を得ることは不可能である。そこで、さらに
出願人けじゃへい板に複数個の窓を取りつけることによ
って上記の如１！難点を克服する多極式を提案している
。However, in such a proposed method, one period of the rotation angle is equal to one period of the output signal, and for example, the mechanical rotation angle is 1/n (n=2 , 3...) is impossible to obtain. Therefore, by attaching multiple windows to the keijahei board, the applicant achieved the above 1! A multipolar system is proposed to overcome these difficulties.
第５図はかかる多極式の原理を示す原理構成図であり、
出力電圧が回転角度の２倍の関数となる場合（ｎ＝２の
場合）の例を示すものである。FIG. 5 is a principle configuration diagram showing the principle of such a multipolar system,
This shows an example where the output voltage is a function of twice the rotation angle (n=2).
つまり、第５図の基本的な構成は第３図と同じであるが
、しやへい板乙に空間的な角度で−・３６０度＝９０度
（１口２）
ｎ
にわたって同一形状の窓３１．３２を２個設ける一方、
受光部４１は９０°にわたって１個形成した点が第３図
と異なっている。In other words, the basic configuration of FIG. 5 is the same as that of FIG. 3, but the window 31 has the same shape over the spatial angle of -360 degrees = 90 degrees (1 opening 2) n. While providing two .32,
The difference from FIG. 3 is that one light receiving section 41 is formed over 90 degrees.
したがって、この場合も受光体４の基準軸をα、回転す
るじゃへい板乙の基準軸をβと定め、このα軸から見た
β軸の角度をθとすると、θはしやへい板５の回転に伴
って第５Ａ図の（イ）、（ロ）。Therefore, in this case as well, let the reference axis of the photoreceptor 4 be α, the reference axis of the rotating shield plate 5 be β, and let the angle of the β axis seen from this α axis be θ, then θ is (A) and (B) in Fig. 5A as the rotation of .
（ハ）の如く変化する。第５Ａ図（イ）、（ロ）の受光
部４１’、４１”は窓３１’、３１”を通過した光を受
光しており、同図（ハ）の受光部４１″′は窓３２ ／
／／を通過した光を受光している。このとき、窓３１．
５２を通して見える受光部の面積Ｓおよび出力電圧Ｖ。It changes as shown in (c). The light receiving sections 41' and 41'' in FIG.
It receives light that has passed through //. At this time, window 31.
Area S and output voltage V of the light receiving section visible through 52.
を第５Ｂ図に示すが、こ〜では回転角度ｌに対して２倍
のθの関数（周期は１／２）となっていることがわかる
（−般に、回転電気機械の分野では空間的カ角匣と電気
的な角度の換算の定数を極対数と呼んでいるので、以下
ではｎを極対数と呼ぶ。）。is shown in Fig. 5B, and it can be seen that it is a function of θ which is twice the rotation angle l (the period is 1/2). Since the constant for converting electric angles into square boxes is called the number of pole pairs, n will be referred to as the number of pole pairs below.).
以上は、−相で関数として三角波の場合について説明し
たが、第４図にも示されるように受光部の形状をかえる
ことによって出力電圧の関数をかえることができ、さら
には空間的な角度と電気信号の角度の換算を行ない、そ
れに従って複数の受光部を配置をずらせて取り付けるこ
とによって、出力電圧の多相化も可能である。Above, we have explained the case of a triangular wave as a function in the negative phase, but as shown in Fig. 4, the function of the output voltage can be changed by changing the shape of the light receiving part, and furthermore, it is possible to change the function of the output voltage by changing the spatial angle. By converting the angle of the electrical signal and attaching a plurality of light receiving sections with their positions shifted accordingly, it is also possible to make the output voltage multiphase.
しかしながら、上記の方式でけしやへい板の個でおり、
受光部も同様である。その丸め、極対数を多くしてゆく
と（ｎを大きくしてゆくと）、受光部の面積を小さくし
なければならない。すなわち、受光部が出力する最大電
圧は極対数に反比例するので、極対数ｔＳまり多くする
とオフセット。However, with the above method, the number of pieces of poppy and hei board is reduced,
The same applies to the light receiving section. As the number of rounding and pole pairs increases (as n increases), the area of the light receiving section must be reduced. In other words, the maximum voltage output by the light receiving section is inversely proportional to the number of pole pairs, so if the number of pole pairs tS increases, an offset occurs.
ドリフト等の影響で精度が低下するという問題が生じる
ことになる。A problem arises in that the accuracy decreases due to effects such as drift.
したがって、この発明は光を用いて回転体の位置を回転
角度の関数として検出するとへもに、出力電圧の関数が
回転角度のｎ倍の関数となるようにする場合において、
出力電圧の最大値を極対数ｎとは無関係に決定できるよ
うにして、検出精度がｎの増加によって低下しないよう
にすることを目的とする。Therefore, the present invention uses light to detect the position of a rotating body as a function of the rotation angle, and when the output voltage is made to be a function of n times the rotation angle,
It is an object of the present invention to enable the maximum value of an output voltage to be determined independently of the number of pole pairs n, so that detection accuracy does not decrease as n increases.
にわたって同一形状でｍ個（最大でｎ個）の受光し、各
受光部の出力電圧の和をとるようにする。m pieces (maximum n pieces) of light are received with the same shape over the entire area, and the sum of the output voltages of each light receiving part is calculated.
上記の如くすることにより、出力電圧が回転角度のｎ倍
の関数となるばかりでなく、その最大値が極対数ｎに無
関係に決定できるようになり、検出精度の低下を回避す
ることが可能となる。By doing the above, the output voltage not only becomes a function of n times the rotation angle, but also its maximum value can be determined independently of the number of pole pairs n, making it possible to avoid a decrease in detection accuracy. Become.
第１図はこの発明の実施例を示す構成図、第１Ａ図はそ
の受光部の出力を示す波形図である。第１図からも明ら
かなように、その基本的な構成は先の第５図と同様であ
るが、しゃへい板３には空にわたって２個の同一形状の
窓３１．３２を互いに９０度の間隔をあけて配置すると
〜もに、受光体４は第５図と異なり２個の受光部４１．
４２を９０度にわたって窓５１．３２と同じく９０度の
間隔をあけて配置した点、および加算演算器５を設けた
点が特徴である。FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 1A is a waveform diagram showing the output of the light receiving section. As is clear from FIG. 1, its basic configuration is the same as that shown in FIG. However, unlike in FIG. 5, the photoreceptor 4 has two light-receiving sections 41.
42 are arranged over 90 degrees with an interval of 90 degrees in the same way as the windows 51 and 32, and the adder 5 is provided.
したがって、しやへい板３および受光体４は−・３６０
度（−１ＳＯ度）回転させて見ても同一に見えることに
なり、その２個の受光部の出力電圧を加算器５にて加算
することにより、受光部の出力電圧を受光部が１つの場
合よりも増大させるようにする。つまり、例えば窓３１
を通過した光が受光部４１を照射していれば、窓３２を
通過した光は受光部４２を照射し、各窓から見える受光
部の面積は等しいことより、その出力電圧ｖ２１゜ｖ２
□は等しく、加算演算器５を用いて和をとった出力電圧
ｖ２と回転角度の関数は受光部が１個の場合と比べて振
幅だけが２倍となるだけで、関数自体や位相は変化しな
いことになる。この関係を第１Ａ図に示す。Therefore, the shielding plate 3 and the photoreceptor 4 are -360
It looks the same even if it is rotated by -1SO degree, and by adding the output voltages of the two light receiving sections in the adder 5, the output voltage of the light receiving section can be adjusted to Try to increase it more than usual. That is, for example, window 31
If the light passing through the window 32 illuminates the light receiving section 41, the light passing through the window 32 will illuminate the light receiving section 42, and since the area of the light receiving section visible from each window is equal, the output voltage v21゜v2
□ is the same, and the function of the output voltage v2 and the rotation angle, which are summed using the adder 5, only has twice the amplitude compared to the case where there is one light receiving part, but the function itself and the phase change. I will not do it. This relationship is shown in FIG. 1A.
これより、出力電圧を回転角度のｎ倍の関数とすると、
個々の受光部の出力電圧の振幅は１ ／ ｎとなるが、
ｍ個（最大でｎ個）の受光部の出力電圧の和をとること
によって、全体の出力電圧の出力可能表最大値をｎに無
関係となるようにすることができ、その結果検出精度も
ｎによって悪化することはなく、多極化を安定に行うこ
とが可能となる。From this, if the output voltage is a function of n times the rotation angle, then
The amplitude of the output voltage of each light receiving part is 1/n,
By summing the output voltages of m (up to n) light receiving sections, the maximum value of the output possible table for the entire output voltage can be made to be independent of n, and as a result, the detection accuracy can also be reduced to n. This will not cause any deterioration, and it will be possible to stably perform multipolarization.
ここで、例えばｎｗ５の場合を考える。この場合、しや
へい板に設ける５個の窓は、
にわたって３６度の間隔で配置する。このとき、受光部
も３６度にわたっており、窓と同じ＜３６度の間隔で５
枚配置してその出力電圧の和をとれば、先に述べた実施
例のごとく出力電圧の最大値は極対数が１（ｍ−１）の
ものと同じにすることができる。なお、受光体に実際に
配置する受光部は５枚よりも少なくても良いが、その分
だけ出力可能な最大値が減少するだけで、多極式になる
ことは第１図の説明からも容易に理解できる。Here, consider the case of nw5, for example. In this case, the five windows provided in the shingle board will be spaced at 36 degree intervals across . At this time, the light receiving area also spans 36 degrees, and 5
By arranging them and calculating the sum of their output voltages, the maximum value of the output voltage can be made the same as in the case where the number of pole pairs is 1 (m-1), as in the previously described embodiment. Note that the number of light-receiving elements actually placed on the light-receiving body may be less than five, but the maximum output value will be reduced by that amount, and the explanation in Figure 1 shows that it will become a multi-polar type. Easy to understand.
つまり、この発明によれば、多極式の位置検出器の出力
電圧の最大Ｋ ｖ は極対数が１のもｍａｘ
のの最大値ｖ１ｍａＸを基準とすると、ｖｎ ｍａＸ
＝−ｖｌ ｍａＸ
（ｎ＝２ｙ３ｙ・・・・・・、 ｍ””２，３．・・・
、ｎ）となり、対極数がきまると選択可能なｍの匝も決
まる。また、ｎ、ｍは整数であることより、基準直のＶ
との関係から離散的な筐しかとれなｍａＸ
いが、実際の出力電圧ｖｎは受光部の面積を連続に変え
ることが可能なので、同様に連続な値をとることができ
る。In other words, according to the present invention, the maximum output voltage K v of the multipolar position detector is based on the maximum value v1maX of max when the number of pole pairs is 1, then vn max
=-vl maX (n=2y3y..., m""2,3...
, n), and when the number of counter electrodes is determined, the number of m that can be selected is also determined. Also, since n and m are integers, the reference direct V
However, since the area of the light receiving section can be continuously changed, the actual output voltage vn can similarly take continuous values.
以上では、−相で関数として三角波の場合について説明
したが、第４図に示すように受光部の形状をかえること
によって出力電圧の関数をかえることができ、さらには
空間釣力角度と電気信号の角度の換算を行ない、それに
従って複数の受光部をその配置を互いにずらせて取り付
けることによって、出力電圧の多相化も可能であること
は前述のとおりである。また、この発明は出願人がすで
に提案している光の方向をラジアル方向とする方式（特
願昭６０−２７２５７４号）Ｋも、同様の考えで適用す
ることができる。さらに、この発明は出願人がすでに提
案している受光部を２個１組にし、その出力電圧を差動
で用いることによって出力電圧に含まれるオフセット電
圧を除去する方式にも、同様の考えで適用することがで
き、この場らせて配置されることになる。Above, we have explained the case of a triangular wave as a function in the - phase, but as shown in Figure 4, by changing the shape of the light receiving part, the function of the output voltage can be changed, and furthermore, the spatial fishing force angle and the electrical signal can be changed. As described above, it is possible to convert the output voltage into multiple phases by converting the angle and attaching a plurality of light receiving sections with their positions shifted from each other accordingly. Further, the present invention can also be applied to the system K (Japanese Patent Application No. 60-272574), which has already been proposed by the applicant, in which the direction of light is radial. Furthermore, this invention applies the same idea to the method already proposed by the applicant in which two light receiving sections are combined into a set and the output voltage is used differentially to remove the offset voltage included in the output voltage. It can be applied and will be placed in place.
この発明によれば、固定的に設置された発光体と受光体
との間に回転体とともに回転するじゃへい板を所定の間
隔をもって配置し、とのしゃへい板にはこれを空間的角
度を２ｎ等分したその１つおきにｎ個の同一形状の光透
過用窓を設ける一方、配置することによって、たとえば
多極レゾルバのように空間的角度のｎ倍の電気的角度を
有しながら、出力信号の最大値を極対数ｎに無関係に決
定することが可能々ので、検出精度が極対数ｎの増加に
よって低下することの彦い多極式の位置検出装置を提供
し得る利点がもたらされる。According to this invention, a shielding plate that rotates together with the rotating body is arranged at a predetermined interval between a fixedly installed light emitting body and a light receiving body, and the shielding plate is arranged at a spatial angle of 2n. By providing n identically shaped light transmission windows in every other equally divided window, for example, by arranging them, the output can be adjusted while having an electrical angle that is n times the spatial angle, as in the case of a multipolar resolver. Since the maximum value of the signal can be determined independently of the number n of pole pairs, there is an advantage that a multipolar position detection device whose detection accuracy does not decrease as the number n of pole pairs increases.
第１図はこの発明の実施例を示す構成図、第１Ａ図はそ
の受光部の出力を示す波形図、第２図はレゾルバの原理
を示す原理構成図、第２Ａ図は、その動作を説明するた
めの波形図、第３図は提案方式の原理を示す原理構成図
、第３Ａ図は第３図におけるしやへい板の窓を通して観
測される受光部分の推移を説明するための説明図、第３
Ｂ図はその受光部の出力を示す波形図、第４図は提案方
式の変形例を示す概要図、第４Ａ図はその出力を示す波
形図、第５図は多極式の原理を示す原理構成図、第５Ａ
図は第５図におけるじゃへい板の窓を通して観察される
受光部分の推移を説明するための説明図、第５Ｂ図はそ
の受光部の出力を示す波形図である。
符号説明
１・・・・・・回転体、２・・・・・・発光体、３・・
・・・・しやへい板、３１．３１’〜３１”’、３２．
３２’〜３２／／／・・・・・・光透過用窓、４・・・
・・・受光体、４１ 、４１’〜４１”’、４２〜４４
・・・・・・受光部、１ｏ・・・・・・固定子、１１・
・・・・・回転子、Ｖ ｏ＋ Ｖ ２・・・・・・回転
位置検出々力、５・・・・・−加算演算器。
代理人 弁理士 並 木 昭 夫
代理人 弁理士 松 崎 清
第１図
第１Ａ図
第２図 第２Ａ図
（ロ）
第４図
第４Ａ図Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 1A is a waveform diagram showing the output of the light receiving section, Fig. 2 is a principle block diagram showing the principle of the resolver, and Fig. 2A explains its operation. FIG. 3 is a principle block diagram showing the principle of the proposed method; FIG. 3A is an explanatory diagram for explaining the transition of the light receiving area observed through the window of the shiihei board in FIG. 3; Third
Figure B is a waveform diagram showing the output of the light receiving section, Figure 4 is a schematic diagram showing a modification of the proposed method, Figure 4A is a waveform diagram showing the output, and Figure 5 is the principle of the multipolar system. Block diagram, 5A
The figure is an explanatory diagram for explaining the transition of the light-receiving portion observed through the window of the shroud in FIG. 5, and FIG. 5B is a waveform diagram showing the output of the light-receiving portion. Code explanation 1... Rotating body, 2... Luminous body, 3...
...Shiyahei board, 31.31'~31''', 32.
32'~32///...Light transmission window, 4...
...Photoreceptor, 41, 41'~41''', 42~44
...... Light receiving section, 1o... Stator, 11.
... Rotor, V o + V 2 ... Rotation position detection force, 5 ... - Addition calculator. Agent Patent Attorney Akio Namiki Agent Patent Attorney Kiyoshi Matsuzaki Figure 1 Figure 1A Figure 2 Figure 2A (B) Figure 4 Figure 4A
Claims (1)
もに回転するしやへい板を同軸的に配置し、該しやへい
板にはこれを空間的角度で２ｎ（ｎは２を最小とする正
の整数）等分したその１つおきにｎ個の同一形状の光透
過用窓を設ける一方、前記受光板には光量に比例する所
定関数の電気信号を発しその各々が空間的角度で３６０
度／２ｎにわたつて形成されるｍ個（ｍ＝２、３・・・
・・・、ｎ）の受光部を配置し、該受光部各々の出力電
圧を加算することにより、受光部が１個の場合のｍ倍の
出力を得ることを特徴とする回転位置検出装置。A shielding plate that rotates together with the rotating body is placed coaxially between the fixedly installed light emitting body and the light receiving plate, and the shielding plate is attached to the shielding plate at a spatial angle of 2n (n is a positive integer with a minimum value of 2) N identically shaped light transmitting windows are provided every other equally divided window, while an electric signal of a predetermined function proportional to the amount of light is emitted to the light receiving plate. is a spatial angle of 360
m pieces formed over degree/2n (m=2, 3...
. . , n) A rotational position detection device characterized in that by arranging light receiving sections and adding the output voltages of each of the light receiving sections, an output m times that of a case where there is only one light receiving section is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14936886A JPS636417A (en) | 1986-06-27 | 1986-06-27 | Rotational position detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14936886A JPS636417A (en) | 1986-06-27 | 1986-06-27 | Rotational position detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS636417A true JPS636417A (en) | 1988-01-12 |
Family
ID=15473609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14936886A Pending JPS636417A (en) | 1986-06-27 | 1986-06-27 | Rotational position detecting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS636417A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998046410A1 (en) * | 1997-04-16 | 1998-10-22 | Husky Injection Molding Systems Ltd. | Partial crystallization method and apparatus of amorphous plastic articles |
| KR100530570B1 (en) * | 1997-12-12 | 2006-01-27 | 주식회사 코오롱 | Release label for wet laminating, method for manufacturing the same, and method for manufacturing laminated moisture-permeable waterproof cloth using the same. |
| US7887319B2 (en) | 2005-10-11 | 2011-02-15 | Toyo Seikan Kaisha, Ltd. | Apparatus for cooling preformed articles and method of cooling preformed articles |
| JP2012185175A (en) * | 2005-10-13 | 2012-09-27 | Hamamatsu Photonics Kk | Encoder |
-
1986
- 1986-06-27 JP JP14936886A patent/JPS636417A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998046410A1 (en) * | 1997-04-16 | 1998-10-22 | Husky Injection Molding Systems Ltd. | Partial crystallization method and apparatus of amorphous plastic articles |
| KR100530570B1 (en) * | 1997-12-12 | 2006-01-27 | 주식회사 코오롱 | Release label for wet laminating, method for manufacturing the same, and method for manufacturing laminated moisture-permeable waterproof cloth using the same. |
| US7887319B2 (en) | 2005-10-11 | 2011-02-15 | Toyo Seikan Kaisha, Ltd. | Apparatus for cooling preformed articles and method of cooling preformed articles |
| JP2012185175A (en) * | 2005-10-13 | 2012-09-27 | Hamamatsu Photonics Kk | Encoder |
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