JPH0271118A - Apparatus for optically detecting position or speed of moving body - Google Patents
Apparatus for optically detecting position or speed of moving bodyInfo
- Publication number
- JPH0271118A JPH0271118A JP22237788A JP22237788A JPH0271118A JP H0271118 A JPH0271118 A JP H0271118A JP 22237788 A JP22237788 A JP 22237788A JP 22237788 A JP22237788 A JP 22237788A JP H0271118 A JPH0271118 A JP H0271118A
- Authority
- JP
- Japan
- Prior art keywords
- light
- moving object
- speed
- shielding
- moving
- 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
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000000465 moulding Methods 0.000 claims abstract description 6
- 230000001678 irradiating effect Effects 0.000 claims abstract 2
- 239000000463 material Substances 0.000 claims description 15
- 239000003973 paint Substances 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000000748 compression moulding Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 8
- 239000011295 pitch Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Landscapes
- Optical Transform (AREA)
Abstract
Description
【発明の詳細な説明】
”〔産業上の利用分野〕
本発明は、速度や位置制御用モータ等に使用される移動
体あるいは回転体の検出装置に係り、特に、光学的に検
出するために好適な形状と製造方法および、装置に関す
る。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a detection device for a moving body or a rotating body used in a speed or position control motor, etc. The present invention relates to a suitable shape, manufacturing method, and device.
従来知られている移動体の位置や速度を検出する方法と
しては、大別すると磁気式エンコーダによる方法と、光
式エンコーダによる方法がある。Conventionally known methods for detecting the position and speed of a moving body can be roughly divided into methods using magnetic encoders and methods using optical encoders.
本発明は、先代エンコーダ法に関係する。The present invention relates to a predecessor encoder method.
先代エンコーダ法は、投、受光部と計測用円板で構成さ
れる。計測用円板は、薄いＳＵＳ材が使用され、精密プ
レス打抜き、あるいは、エツチングによって製作される
のが一般的であり、実開昭６３−３３４０９号公報記載
のものもこれに相当する。The previous encoder method consists of a light emitter, a light receiver, and a measurement disk. The measuring disk is generally made of thin SUS material and manufactured by precision press punching or etching, and the disk described in Japanese Utility Model Application Publication No. 63-33409 corresponds to this.
上記従来技術においても、回転角度計測用円板のスリッ
ト幅やピッチが広い（大きい）場合は、プレス打抜きが
容易であり、量産性も高く、コストの面でも問題はない
。しかし、同円板のスリット幅や、ピッチがせまくなる
と、高精度な精密プレス金型が必要となり、さらにせま
くなると、化学的なエツチング加工に頼らざるを得ず、
量産性は極端に低下する。Even in the above conventional technology, when the slit width and pitch of the rotation angle measuring disk are wide (large), press punching is easy, mass productivity is high, and there is no problem in terms of cost. However, as the slit width and pitch of the disk become narrower, a high-precision press mold is required, and when the slit width becomes even narrower, chemical etching becomes necessary.
Mass productivity will be drastically reduced.
従って、当然、コスト高になるという問題があった。Naturally, therefore, there was a problem of high costs.
本発明の目的は、回転角度計測用円板をプラスチック化
すると同時に、スリット部にレンズ効果をもたせ、安価
で高精度な円板を得るための、製品形状と製造方法を確
立することにより、最適な回転角度計測装置を提供する
ことにある。The purpose of the present invention is to make the disc for measuring rotational angles plastic, and at the same time to provide a lens effect to the slit part, and to establish an optimal product shape and manufacturing method to obtain a disc with low cost and high precision. An object of the present invention is to provide a rotation angle measuring device.
上記目的は、計測用円板の素材を安価なプラスチックス
化すること、成形を自動化すること、スリット部にレン
ズ効果を持たせてピッチ精度を良くすること、光の透過
と、遮光を明確にすることなどにより、達成される。The above objectives are to use inexpensive plastic as the material for the measurement disc, to automate the molding, to improve the pitch accuracy by giving the slit a lens effect, and to clarify the transmission and blocking of light. It is achieved by doing things like
具体的な１つの構成としては、投光器と、これに光学的
に対向させた受光器と、この投光器から発せられた光路
内に移動自在に置かれた移動体とから成り、この移動体
に交互に光を透過させる透光部分と光を遮ぎる遮光部分
を設け、透光部分を通過した光を前記受光器にて受け、
この受光器からの出力信号にて移動体の位置や速度を検
出するものにおいて、
前記移動体をプラスチック製として、その両面（入出射
面）あるいはいずれか一方面に規則的なピッチで曲面と
、この曲面よりも充分に幅の狭い平面を交互に形成し、
この曲面部によって集光された光を受光器で受け、これ
を電気信号に変換し、平面部で遮光したことを特徴とす
る移動体の位置や速度を光学的に検出するようにしたも
のである。One specific configuration consists of a projector, a receiver optically opposed to the projector, and a movable body placed movably within the optical path emitted from the projector. a light-transmitting part that transmits light and a light-shielding part that blocks light; the light passing through the light-transmitting part is received by the light receiver;
In the device for detecting the position and speed of a moving object using the output signal from the light receiver, the moving object is made of plastic, and curved surfaces at regular pitches are formed on either both surfaces (input/output surface) or one of the surfaces. Alternately form planes that are sufficiently narrower than this curved surface,
The light focused by this curved surface is received by a light receiver, converted into an electrical signal, and the light is blocked by a flat surface.The position and speed of a moving object is optically detected. be.
まず、移動体である計測用円板の素材は、ＳＵＳ材に代
ってプラスチック材（アクリル等）にして、円板と、取
付用のボスの一体化を図る。素材は透明な材料の場合は
、遮光を目的とした溝を膜を形成し、不透明な材料の場
合は、透過用のスリットを設ける。First, the material of the measuring disk, which is a moving body, is made of plastic (acrylic, etc.) instead of SUS, and the disk and the mounting boss are integrated. If the material is a transparent material, a film is formed with grooves for the purpose of blocking light, and if the material is an opaque material, a slit for transmission is provided.
また、光の人、出射面は、平面だけではなく、入射した
光を所望の位置に集光させるに適した形状に成形をする
ことで１回転角度の計測精度を向上させることができる
。Furthermore, the measurement accuracy of one rotation angle can be improved by shaping the light emitting surface not only into a flat surface but into a shape suitable for focusing the incident light on a desired position.
円板の形状精度を向上させるために、低圧、低歪予備成
形を前提とした加圧成形を採用した。In order to improve the shape accuracy of the disc, we adopted pressure forming based on the premise of low-pressure, low-distortion preforming.
この成形方法は、高圧加圧時の素材の流れる距離が短く
、回転軸に対して放射状となり、精密成形に適している
。This molding method is suitable for precision molding because the material flows over a short distance when pressurized at high pressure, and the flow is radial with respect to the rotation axis.
以下、本発明の実施例を、第１図〜第１３図により説明
する。本発明は回転あるいは直線いずれの移動体にも適
用されるが、実施例では便宜上回転の例について説明す
る。Embodiments of the present invention will be described below with reference to FIGS. 1 to 13. Although the present invention is applicable to either rotating or linear moving bodies, in the embodiment, a rotating example will be described for convenience.
まず、第１図に速度や位置制御用のモータの回転角度計
測用として使用される９本発明による回転角度計測用円
板の一実施例を示す。First, FIG. 1 shows an embodiment of a rotational angle measuring disc according to the present invention, which is used for measuring the rotational angle of a motor for speed and position control.
モータのシャフトに組付けるためのボス１とフランジ２
は、一体化成形されている。フランジ２には、計測レベ
ルに合わせて放射状に配置された凸面を有した細長いレ
ンズ部８が形成されている。Boss 1 and flange 2 for assembly on the motor shaft
are integrally molded. The flange 2 is formed with an elongated lens portion 8 having a convex surface arranged radially in accordance with the measurement level.
このレンズ部８には、複数のレンズに渡って照射される
光源３があり、出射側には、集光部４の光を検知する受
光部５が配置されている。This lens section 8 includes a light source 3 that irradiates across a plurality of lenses, and a light receiving section 5 that detects the light from the condensing section 4 is arranged on the output side.
レンズ部８に照射された光源３は、レンズ部８の形状に
依って集光され、マルチ集光線状となり、その光を受光
部５が検出し、モータの回転速度や位置を制御する。The light source 3 irradiated onto the lens section 8 is focused depending on the shape of the lens section 8 to form a multi-condensing line, and the light receiving section 5 detects the light to control the rotational speed and position of the motor.
第２図に、レンズ部８の拡大図を示す。FIG. 2 shows an enlarged view of the lens section 8.
光源３は（レンズ部８の入射面６と、出射面７を透過す
ることにより集光され、線状の焦点（集光部４）を結ぶ
。出射面７には、各レンズを独立させるためのスリット
があり、光の透過を妨げる為の遮光部９がある。受光部
５は、集光部４を順次検出する。The light source 3 is condensed by passing through the incident surface 6 of the lens section 8 and the exit surface 7, and forms a linear focal point (condensing section 4). There is a slit, and a light shielding part 9 for blocking the transmission of light.The light receiving part 5 sequentially detects the light condensing part 4.
第３図の実施例は、光源３が平行光、または、平行光に
近い場合のレンズ部８の形状を示す。この場合、入射面
６は、平面であり、出射面７の凸面形状により集光部４
を得て、受光部５が検出をするものである。この場合も
、出射面７側に各レンズを独立させるためのスリットが
あり、光の透過を妨げる為の、遮光部９がある。The embodiment shown in FIG. 3 shows the shape of the lens portion 8 when the light source 3 is parallel light or nearly parallel light. In this case, the entrance surface 6 is a plane, and the convex shape of the exit surface 7 causes the light condensing part 4 to
, and the light receiving section 5 performs detection. In this case as well, there are slits on the exit surface 7 side to make each lens independent, and there is a light shielding part 9 to prevent light transmission.
第４図の実施例は、一体成形をしたボス１付の透明な円
板の上面または下面に、放射状に１等間隔に設けた溝に
、遮光用の塗料を塗布する、あるいは、その溝部に反射
膜を生成して、遮光部９と、透過部１０を交互に設け、
光学的なスリットを得た例である。上記遮光部９は、出
射面７側に設けると光の遮光が鋭くなり、検出精度を向
上させることができる。In the embodiment shown in Fig. 4, light-shielding paint is applied to grooves provided at equal intervals in a radial manner on the top or bottom surface of a transparent disc with integrally molded boss 1, or in the grooves. A reflective film is generated and light shielding parts 9 and transmitting parts 10 are provided alternately,
This is an example of obtaining an optical slit. When the light shielding section 9 is provided on the exit surface 7 side, the light is sharply blocked, and detection accuracy can be improved.
第５図の実施例は、一体成形をしたボス１付の透明な円
板の上面、または、下面に放射状に等間隔に反射膜や、
乱反射膜１１を形成し、遮光部９゜透過部１０を交互に
設けることにより、光学的なスリットを得た例である。The embodiment shown in FIG. 5 has reflective films arranged radially at equal intervals on the upper or lower surface of a transparent disc with integrally molded boss 1.
This is an example in which an optical slit is obtained by forming a diffuse reflection film 11 and alternately providing light shielding parts 9 degrees and transmission parts 10.
上記と同様に、遮光部９、乱反射部１１は、出射面７側
に設けると光の遮光が鋭くなり、検出精度を向上させる
ことができる。Similarly to the above, when the light shielding part 9 and the diffuse reflection part 11 are provided on the exit surface 7 side, the light is sharply blocked, and detection accuracy can be improved.
第６図の実施例は、平行光、あるいは、平行光に近い光
源３を使ったレンズ部８の形状を示す。The embodiment shown in FIG. 6 shows the shape of the lens portion 8 using a light source 3 that is parallel light or nearly parallel light.
入射面６は、平面であり、等間隔に、放射状に溝部を設
けてあり、出射面７は、凸レンズ面となっていて、光を
集光し、集光部４を得ることができる。この集光部４を
、受光部５が検出する。この形状で、遮光部９の幅（Ｄ
）は下面レンズ間の溝幅（ｄ）より等しいか、広くする
ことで、均一な平行光を得ることができる。The entrance surface 6 is a flat surface, and grooves are provided radially at equal intervals, and the exit surface 7 is a convex lens surface and can condense the light to obtain the condensing section 4. The light receiving section 5 detects this light condensing section 4 . With this shape, the width (D
) is equal to or wider than the groove width (d) between the lower lenses, uniform parallel light can be obtained.
第７図の実施例は１回転円板（フランジ２）の片面に、
等間隔で、鋭角の陵線を有した三角平面を形成した。In the embodiment shown in FIG. 7, on one side of the one-rotation disk (flange 2),
It formed a triangular plane with equidistant, acute-angled ridges.
投光部１２から投光された光源３は、高反射部１３の、
ある−点で、受光部５で検出される。その他の点や、低
反射部では、光ｒＡ３は、受光部５へ入射しない。上記
の中で、高反射部１３と低反射部１４は、絶対条件では
なく、双方共高反射面でも可である。The light source 3 projected from the light projecting section 12 is
It is detected by the light receiving unit 5 at a certain point. At other points or in low reflection areas, the light rA3 does not enter the light receiving unit 5. Among the above, the high reflection part 13 and the low reflection part 14 are not an absolute condition, and both may be high reflection surfaces.
第８図の実施例は、フランジ２に遮光塗料の塗布方法で
ある。ボス１端面とフランジ２の間に、塗料留り１６を
設け、その凹部に遮光塗料１５を滴下する。この時、フ
ランジ２は、回転させておくために、滴下された遮光塗
料１５は、遠心力によって遮光部９へ流入し、塗布を完
了する。The embodiment shown in FIG. 8 is a method of applying light-shielding paint to the flange 2. A paint retainer 16 is provided between the end face of the boss 1 and the flange 2, and a light-shielding paint 15 is dropped into the recess. At this time, since the flange 2 is kept rotating, the dropped light-shielding paint 15 flows into the light-shielding part 9 by centrifugal force, completing the application.
第９図の実施例は、遮光部９および、透過部１０の形状
を示している。計測用円板をモールド成形する場合の金
型の駒の加工を容易に、かつ。The embodiment shown in FIG. 9 shows the shapes of the light shielding part 9 and the transmitting part 10. Easy processing of mold pieces when molding measurement discs.
精度よく行なうために、透過部１０の形状は、円板の法
線に対して平行にしである。In order to perform this with high precision, the shape of the transmission section 10 is parallel to the normal line of the disk.
駒の加工を、平面研磨等で加工する場合も、砥石の走り
方向も単純となり、°高精度加工が容易である。ただし
、遮光部９の形状は扇状となる。Even when the pieces are processed by surface polishing, etc., the running direction of the grindstone is also simple, making it easy to perform high-precision processing. However, the shape of the light shielding portion 9 is fan-shaped.
第１０図の実施例は、計測用円板の成形方法について示
した。まず、低圧予備成形をしたブランクを金型内へ供
給し、圧縮成形をする。この方法では、ゲート（素材流
入）跡がなく、素材の流れ１７は、軸中心から放射状と
なり、素材内の背向や内部歪は均一となる。The embodiment shown in FIG. 10 shows a method of forming a measuring disk. First, a low-pressure preformed blank is fed into a mold and compression molded. In this method, there is no gate (material inflow) trace, the flow 17 of the material is radial from the axial center, and the back direction and internal strain in the material are uniform.
第１１図の実施例は、計測用円板を、遮光素材１８を使
って成形をした例であり、光を通過させるためのスリッ
ト１９を、放射状に等間隔に設けである。The embodiment shown in FIG. 11 is an example in which the measuring disk is molded using a light-shielding material 18, and slits 19 for passing light are provided at equal intervals radially.
第１２図の実施例は、計測用円板の集光部４と受光部５
の検出感度を調整する目的で、レンズ部８と受光部５と
の間隔を調整するように、構成した例である。この場合
、光源３と、入射面６と出射面７と、遮光部９は同一で
ある。The embodiment shown in FIG.
This is an example in which the distance between the lens section 8 and the light receiving section 5 is adjusted in order to adjust the detection sensitivity of the sensor. In this case, the light source 3, the entrance surface 6, the exit surface 7, and the light shielding part 9 are the same.
第１３図の実施例は、フランジ２の面に、適当な回折格
子２０を設けることにより、光源３の回折光を発生させ
、回折０次光２１や、回折±１次光２２などの多次光を
検出することにより、微細な回転角を検出、計数するよ
うにした例である。In the embodiment shown in FIG. 13, a suitable diffraction grating 20 is provided on the surface of the flange 2 to generate diffracted light from the light source 3, and multiple orders such as the 0th-order diffracted light 21 and the ±1st-order diffracted light 22 are generated. This is an example in which minute rotation angles are detected and counted by detecting light.
第１４図の実施例は、フランジ２の、遮光部９と透過部
１０が交互に通過するところに、受光部５を設け、その
中に、正確に形成された複数の受光素子パターン２３が
ある。透過部１０を透過、あるいは、集光された光を順
次検出することで、微細な計数、あるいは、透過部のピ
ッチを大きくとることが可能である。この例で受光素子
パターン２３をδずらしたので、分解能（最小検出ピッ
チ）はδである。In the embodiment shown in FIG. 14, a light receiving section 5 is provided at a portion of the flange 2 where the light shielding section 9 and the transmitting section 10 alternately pass, and therein is a plurality of accurately formed light receiving element patterns 23. . By sequentially detecting the light transmitted through or condensed through the transmission section 10, it is possible to perform fine counting or to increase the pitch of the transmission sections. In this example, since the light receiving element pattern 23 is shifted by δ, the resolution (minimum detection pitch) is δ.
以上説明したように本発明によれば、第１に移動体をプ
ラスチック製として、その両面（入出°射面）あるいは
いずれか一方面に規則的なピッチで曲面と、この曲面よ
りも充分に幅の狭い平面を交互に形成し、この曲面部に
よって集光された光を受光器で受け、これを電気信号に
変換し、平面部で遮光したので、正確な検出と分解能を
高めることができ、又、プラチツクでエツチング等の超
精密加工を不要としたので加工が極めて簡単になる効果
がある。As explained above, according to the present invention, firstly, the movable body is made of plastic, and has a curved surface at a regular pitch on both surfaces (input and exit surfaces) or either one of the surfaces, and has a width sufficiently wider than the curved surface. Narrow flat surfaces are formed alternately, and the light collected by these curved surfaces is received by a light receiver, which is converted into an electrical signal, and the light is blocked by the flat surface, making it possible to improve accurate detection and resolution. Furthermore, since the plastic does not require ultra-precision processing such as etching, processing becomes extremely simple.
更に、溝部（平面部）に塗料を塗布したので、更に、透
過部と遮光部の境界を明確に区別でき、光の干渉がなく
正確に検出でき、誤動作を防止することができる。Furthermore, since the groove portion (flat portion) is coated with paint, the boundary between the transmitting portion and the light blocking portion can be clearly distinguished, there is no light interference, accurate detection is possible, and malfunctions can be prevented.
第１図は本発明の実施例の、計測用円板の斜視図、第２
図は同レンズ部の拡大斜視図、第３図は同側面図、第４
図、第５図は同平面図および、断面側面図、第６図は同
側面図、第７図は同側面図、第８図は同斜視図、第９図
は同平面図、第１０図。
第１１図は同斜視図、第１２図は同側面図、第１３図は
同側面図、第１４図は同平面図である。
１・・・ボス、２・・フランジ、３・・・光源、４・・
・集光部。
５・・・受光部、６・・・入射面、７・・・出射面、８
・・・レンズ部、９・・・遮光部、１０・・・透過部、
１１・・乱反射部、１２・・・投光部、１３・・高反射
部、１４・・・低反射部、１５・・・遮光塗料、１６・
・塗料留り、１７・・・素材の流れ、１８・・・遮光素
材、１９・・・スリット、２０・・・回折格子、２１・
・・回折０次光、２２・・・回折±１次光、２３・・・
受光素子パターン。
渠′２−Ｚ
帛８日
木９区
卒
Ｏ
飛
図
晒
λ図FIG. 1 is a perspective view of a measuring disk according to an embodiment of the present invention, and FIG.
The figure is an enlarged perspective view of the same lens part, Figure 3 is a side view of the same, and Figure 4 is a side view of the same lens.
Figure 5 is a plan view and a sectional side view, Figure 6 is a side view, Figure 7 is a side view, Figure 8 is a perspective view, Figure 9 is a plan view, and Figure 10 is a side view. . 11 is a perspective view of the same, FIG. 12 is a side view of the same, FIG. 13 is a side view of the same, and FIG. 14 is a plan view of the same. 1...Boss, 2...Flange, 3...Light source, 4...
・Light condensing part. 5... Light receiving part, 6... Incident surface, 7... Output surface, 8
... Lens part, 9... Light shielding part, 10... Transmissive part,
11...Diffuse reflection part, 12...Light projection part, 13...High reflection part, 14...Low reflection part, 15...Shading paint, 16.
・Paint retainer, 17... Material flow, 18... Light shielding material, 19... Slit, 20... Diffraction grating, 21.
...Diffraction 0th order light, 22...Diffraction ±1st order light, 23...
Light receiving element pattern.渠'2-Z 帛8th Thursday 9th ward graduation O Hizu exposed λ map
Claims (1)
の投光器から発せられた光路内に移動自在に置かれた移
動体とから成り、この移動体に交互に光を透過させる透
光部分と光を遮ぎる遮光部分を設け、透光部分を通過し
た光を前記受光器にて受け、この受光器からの出力信号
にて移動体の位置や速度を検出するものにおいて、前記
移動体をプラスチック製として、その両面（入出射面）
あるいはいずれか一方面に規則的なピッチで曲面と、こ
の曲面よりも充分に幅の狭い平面を交互に形成し、この
曲面部によつて集光された光を受光器で受け、これを電
気信号に変換し、平面部で遮光したことを特徴とする移
動体の位置や速度を光学的に検出する装置。 ２、前記請求項１記載のものにおいて、 投光器から発する光を複数の曲面部に亘る広い光源とし
たことを特徴とする移動体の位置や速度を光学的に検出
する装置。 ３、請求項１記載の計測用円板において、 計測用円板に照射する光軸を、入射面、あるいは、出射
面に形成した曲面で変化させることを特徴とする移動体
の位置や速度を光学的に検出する装置。 ４、入射面または、出射面に放射状に形成した溝に、光
を透過させない塗料を塗布するか、あるいは溝部表面を
乱反射面にすることにより、遮光部を構成することを特
徴とする移動体の位置や速度を光学的に検出するのに供
される遮光移動体。 ５、請求項４において、 放射状に反射膜を生成することにより、光学的なスリッ
トを構成することを特徴とする移動体。 ６、請求項４において、 遮光膜または、反射膜を計測用円板の出射側に設けるこ
とを特徴とする遮光移動体。 ７、投光器と受光器の光路内に置かれる移動体において
、 均一かつ、平行に近い入射光形状を得る目的で、Ｄ≧ｄ
（第６図参照）として、隣接するレンズからの外乱光を
少なくして、集光するようにしたことを特徴とする移動
体。 ８、請求項７記載の計測用円板において、 規則的に入射光の反射角を変化させるための形状をもつ
反射膜を生成させることを特徴とする移動体。 ９、請求項７において、 移動体に反射率の高い膜（面）と、反射率の低い膜（面
）を交互に配置したことを特徴とする移動体。 １０、請求項７記載のものにおいて、移動体と組付のた
めのボス部を一体化成形をしたことを特徴とする移動体
。 １１、請求項７記載のものにおいて、 遮光用の塗料を、回転中の円板の塗料留り部へ供給し、
回転力（遠心力）によつて塗料を溝部へ流入させ塗布す
ることを特徴とする移動体の製造方法。 １２、請求項７記載のものにおいて、溝（スリット）、
レンズや反射膜の形状を法線に対して平行に形成したこ
とを特徴とする移動体。 １３、請求項１記載のものにおいて、 予備成形を前提とする圧縮成形で成形し、ゲート（素材
流入跡）跡をなくした移動体。 １４、請求項７記載のものにおいて、 光を透過しない素材で成形し、かつ、光を透過させるた
めの規則的なスリットを有した形状に成形して移動体を
製造することを特徴とする移動体。 １５、請求項１記載のものにおいて、 円板の取付位置を移動させることによつて、集光するス
ポット径や、線状光線の大きさ（幅）を調整するように
したことを特徴とする移動体の位置や速度を光学的に検
出する装置。 １６、請求項７記載のものにおいて、 反射面側に、回折格子を形成し、多次の回折光を計数す
るようにしたことを特徴とする移動体。 １７、請求項１記載のものにおいて、 レンズ部によつて集光した線状光線に対して、規則的に
ずらした検出素子パターンを配置して、任意に検出タイ
ミングを発生させ、分解能を高めるようにしたことを特
徴とする移動体の位置や速度を検出する装置。[Claims] 1. Consisting of a projector, a receiver optically opposed to the projector, and a movable body movably placed in the optical path emitted from the projector, the movable body is alternately A light-transmitting part that transmits light and a light-shielding part that blocks light are provided, the light that has passed through the light-transmitting part is received by the light receiver, and the position and speed of the moving object are detected by the output signal from this light receiver. In this case, the moving body is made of plastic, and both sides (input/output surfaces) of the moving body are made of plastic.
Alternatively, curved surfaces and flat surfaces sufficiently narrower than the curved surfaces may be alternately formed at a regular pitch on one of the surfaces, and the light collected by the curved surface is received by a light receiver, and the light is then electrically transmitted. A device that optically detects the position and speed of a moving object by converting it into a signal and blocking the light with a flat surface. 2. An apparatus for optically detecting the position and speed of a moving object according to claim 1, characterized in that the light emitted from the projector is a wide light source extending over a plurality of curved surfaces. 3. The measuring disk according to claim 1, wherein the optical axis irradiating the measuring disk is changed by a curved surface formed on the incident surface or the exit surface. Optical detection device. 4. A moving body characterized in that a light-shielding portion is formed by applying a paint that does not transmit light to the grooves formed radially on the entrance surface or the exit surface, or by making the groove surface a diffusely reflecting surface. A light-shielding moving object used to optically detect position and speed. 5. The moving object according to claim 4, wherein the optical slit is formed by forming a reflective film radially. 6. The light-shielding moving body according to claim 4, characterized in that a light-shielding film or a reflective film is provided on the emission side of the measurement disk. 7. In order to obtain a uniform and nearly parallel incident light shape in a moving object placed in the optical path of the emitter and receiver, D≧d.
(See FIG. 6) A moving object characterized in that the disturbance light from adjacent lenses is reduced and the light is condensed. 8. The measuring disk according to claim 7, characterized in that a reflective film having a shape for regularly changing the reflection angle of incident light is formed. 9. The moving object according to claim 7, wherein films (surfaces) with high reflectance and films (surfaces) with low reflectance are alternately arranged on the moving object. 10. The movable body according to claim 7, wherein the movable body and the boss portion for assembly are integrally molded. 11. The product according to claim 7, wherein the light-shielding paint is supplied to the paint retaining portion of the rotating disc;
A method for manufacturing a moving body, characterized by applying paint by flowing it into a groove using rotational force (centrifugal force). 12. The thing according to claim 7, wherein a groove (slit);
A moving object characterized by lenses and reflective films formed parallel to the normal line. 13. The movable body according to claim 1, which is molded by compression molding based on preforming, and has no gate (material inflow trace) trace. 14. The moving body according to claim 7, characterized in that the moving body is manufactured by molding a material that does not transmit light and having regular slits for transmitting light. body. 15. The device according to claim 1, characterized in that the diameter of the focused spot and the size (width) of the linear light beam are adjusted by moving the mounting position of the disc. A device that optically detects the position and speed of a moving object. 16. The moving object according to claim 7, wherein a diffraction grating is formed on the reflective surface side to count multi-order diffracted light. 17. In the product according to claim 1, detecting element patterns are arranged regularly shifted with respect to the linear light beam condensed by the lens part, and detection timing is arbitrarily generated to improve resolution. A device for detecting the position and speed of a moving object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63222377A JPH0627654B2 (en) | 1988-09-07 | 1988-09-07 | A device that optically detects the position and speed of a moving object |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63222377A JPH0627654B2 (en) | 1988-09-07 | 1988-09-07 | A device that optically detects the position and speed of a moving object |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0271118A true JPH0271118A (en) | 1990-03-09 |
| JPH0627654B2 JPH0627654B2 (en) | 1994-04-13 |
Family
ID=16781404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63222377A Expired - Lifetime JPH0627654B2 (en) | 1988-09-07 | 1988-09-07 | A device that optically detects the position and speed of a moving object |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0627654B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04115122A (en) * | 1990-09-05 | 1992-04-16 | Matsushita Electric Ind Co Ltd | Optical-type encoder |
| WO2002023130A1 (en) * | 2000-09-13 | 2002-03-21 | Mitsubishi Denki Kabushiki Kaisha | Optical encoder |
| US6703601B2 (en) | 1997-02-21 | 2004-03-09 | Fanuc, Ltd. | Motion detection of an optical encoder by converging emitted light beams |
| US7089672B2 (en) * | 2002-02-08 | 2006-08-15 | Robert Bosch Gmbh | Optical angle and torque sensor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49534A (en) * | 1972-04-18 | 1974-01-07 | ||
| JPS513191A (en) * | 1974-06-25 | 1976-01-12 | Seikosha Kk | |
| JPS5726008U (en) * | 1980-07-18 | 1982-02-10 | ||
| JPS61148948A (en) * | 1984-12-21 | 1986-07-07 | Mitsubishi Electric Corp | Voice message talking method |
| JPH04349750A (en) * | 1991-05-28 | 1992-12-04 | Nec Corp | Message recording service system |
-
1988
- 1988-09-07 JP JP63222377A patent/JPH0627654B2/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49534A (en) * | 1972-04-18 | 1974-01-07 | ||
| JPS513191A (en) * | 1974-06-25 | 1976-01-12 | Seikosha Kk | |
| JPS5726008U (en) * | 1980-07-18 | 1982-02-10 | ||
| JPS61148948A (en) * | 1984-12-21 | 1986-07-07 | Mitsubishi Electric Corp | Voice message talking method |
| JPH04349750A (en) * | 1991-05-28 | 1992-12-04 | Nec Corp | Message recording service system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04115122A (en) * | 1990-09-05 | 1992-04-16 | Matsushita Electric Ind Co Ltd | Optical-type encoder |
| US6703601B2 (en) | 1997-02-21 | 2004-03-09 | Fanuc, Ltd. | Motion detection of an optical encoder by converging emitted light beams |
| WO2002023130A1 (en) * | 2000-09-13 | 2002-03-21 | Mitsubishi Denki Kabushiki Kaisha | Optical encoder |
| US7089672B2 (en) * | 2002-02-08 | 2006-08-15 | Robert Bosch Gmbh | Optical angle and torque sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0627654B2 (en) | 1994-04-13 |
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