JPS6143203Y2 - - Google Patents
Info
- Publication number
- JPS6143203Y2 JPS6143203Y2 JP6237181U JP6237181U JPS6143203Y2 JP S6143203 Y2 JPS6143203 Y2 JP S6143203Y2 JP 6237181 U JP6237181 U JP 6237181U JP 6237181 U JP6237181 U JP 6237181U JP S6143203 Y2 JPS6143203 Y2 JP S6143203Y2
- Authority
- JP
- Japan
- Prior art keywords
- rotation
- seal
- line sensor
- axis
- rotating body
- 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
- 230000001678 irradiating effect Effects 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 1
Landscapes
- A Measuring Device Byusing Mechanical Method (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Optical Transform (AREA)
Description
【考案の詳細な説明】 本考案は回転角度計測装置に関する。[Detailed explanation of the idea] The present invention relates to a rotation angle measuring device.
回転体の瞬時回転数あるいは一回転中の回転変
動の検出や、トリガ点を回転軸の一点に規定した
場合の位相角の値をラインセンサを用いて測定す
る装置として、従来は回転軸と直角方向にライン
センサを配置して回転軸上の明暗模様のビツト数
を計数し、回転角を算出する装置を用いていたた
め、前記円周上の明暗模様と測定点間の距離が場
所によつて変わるため、焦点ボケや斜方向に対す
る角度補正を必要とする欠点があつた。 Conventionally, line sensors have been used to detect the instantaneous rotational speed of a rotating body or rotation fluctuations during one rotation, or to measure the value of the phase angle when the trigger point is set at one point on the rotation axis. Since a device was used that placed a line sensor in the direction and counted the number of bits of the bright and dark pattern on the rotation axis to calculate the rotation angle, the distance between the bright and dark pattern on the circumference and the measurement point varied depending on the location. This has the drawback of requiring angle correction for out-of-focus and oblique directions.
本考案は、かかる欠点を除去するものであり、
円周上の変位を軸方向の変位に置換することによ
り、測定系の焦点深度に関係なく回転角度を高精
度に正確に計測できる回転角度計測装置を提供し
ようとするものである。 The present invention eliminates such drawbacks,
The present invention aims to provide a rotation angle measuring device that can accurately measure the rotation angle with high precision regardless of the depth of focus of the measurement system by replacing displacement on the circumference with displacement in the axial direction.
以下、本考案の一実施例を第１図および第２図
を用いて説明する。第１図は本考案の一実施例で
ある回転角度計測装置の概略構成図、第２図は同
装置の動作原理を示す説明図である。図中１は回
転物体、２はその回転軸、３は前記回転軸２上に
設けた四角形のシールである。シール３には対角
線上に黒色の線が複数本印刷されている。４は光
源、５はハーフミラー、６はラインセンサー、７
は円柱若しくは円筒状の回転軸２と同心の回転
軸、８は検出マーク、９は検知器、１０はトリガ
パルス発生器、１１はラインセンサの読取器、１
２は表示装置である。上記構成により位相変動を
有する回転体の位相角を測定するには、前記回転
物体１の円柱若しくは円筒状の回転軸２上に貼り
つけたシール３に光源４からの光をハーフミラー
５を介して照射し、前記ハーフミラー５を通過し
て得られる反射光を回転軸２と軸方向に対し平行
に設けた一次元のラインセンサ６により計測す
る。一方前記回転軸２と同心の回転軸７の円周上
には、測定したい円周上の位置に検出マーク８が
取りつけられており、その通過を光電ピツクアツ
プ電磁ピツクアツプ等の検知手段で読み取ると共
に、これを入力とするトリガパルス発生器１０に
よつて電気的トリガパルスを発生させ、このトリ
ガパルスによつて走査が起動されるラインセンサ
６で後述するようにして前記シール３上の２線間
隔に対応するビツト数（模様）を読取器１１で読
取り、表示装置１２に出力する。 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a schematic configuration diagram of a rotational angle measuring device which is an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing the operating principle of the device. In the figure, 1 is a rotating object, 2 is its rotating shaft, and 3 is a rectangular seal provided on the rotating shaft 2. A plurality of black lines are printed diagonally on the sticker 3. 4 is a light source, 5 is a half mirror, 6 is a line sensor, 7
1 is a rotation axis concentric with the columnar or cylindrical rotation axis 2, 8 is a detection mark, 9 is a detector, 10 is a trigger pulse generator, 11 is a line sensor reader, 1
2 is a display device. In order to measure the phase angle of a rotating body having a phase variation with the above configuration, light from a light source 4 is directed through a half mirror 5 to a sticker 3 attached to a columnar or cylindrical rotating shaft 2 of the rotating body 1. The reflected light obtained by passing through the half mirror 5 is measured by a one-dimensional line sensor 6 provided parallel to the rotating shaft 2 and the axial direction. On the other hand, on the circumference of the rotating shaft 7 concentric with the rotating shaft 2, a detection mark 8 is attached at a position on the circumference that is desired to be measured. The trigger pulse generator 10 which receives this as an input generates an electrical trigger pulse, and the line sensor 6 whose scanning is activated by this trigger pulse adjusts the distance between two lines on the seal 3 as will be described later. The corresponding number of bits (pattern) is read by the reader 11 and output to the display device 12.
シール３は第２図ａに示すように円周方向の回
転角をラインセンサ６と同方向である軸方向の読
みに変換する手段であつて、まずシール３に斜線
が１本だけ印刷されている場合について述べる
と、第２図ｂにおける２直線２０と２１の間の角
を45゜に選べば、トリガ点２２により規定される
ロ点でのスタート点イからの回転角（位相角）θ
は２線間の距離lxを計測すれば下記の関係より容
易に求められる。 The seal 3 is a means for converting the rotation angle in the circumferential direction into an axial reading in the same direction as the line sensor 6, as shown in FIG. If the angle between the two straight lines 20 and 21 in FIG.
can be easily obtained from the following relationship by measuring the distance lx between the two lines.
θ＝２πｌｘ／ｌ２（rad）
ここで、l2はシール３の軸の周方向の一回転分
の円周長である。なお読取り器１１には上記演算
機能を含めてもよい。 θ=2πlx/l 2 (rad) Here, l 2 is the circumferential length of the seal 3 for one rotation in the circumferential direction. Note that the reader 11 may include the above calculation function.
しかしながら、このようにシール３上に斜線が
１本だけ印刷されている場合は、回転軸７の回転
角が小さい場合、あるいはラインセンサ６が高密
度でない場合は、回転角の変位が軸方向の変位に
十分に変換できず、軸方向の変位が十分に読み取
れない。そこで、第１図や第３図に示すようにシ
ール３上に鋸歯状波的に斜線を複数本（回転体の
１回転中に複数本）印刷することによりこの問題
点を解決できる。 However, if only one diagonal line is printed on the seal 3 like this, if the rotation angle of the rotating shaft 7 is small, or if the line sensor 6 is not high density, the displacement of the rotation angle will be axially It cannot be converted to displacement sufficiently, and the displacement in the axial direction cannot be read sufficiently. This problem can be solved by printing a plurality of diagonal lines in a sawtooth pattern on the seal 3 (multiple lines during one rotation of the rotating body) as shown in FIGS. 1 and 3.
すなわち、第１図、第３図では、回転軸７が１
回転中に鋸歯状波的な斜線が２本印刷されている
ため、第２図ｂの直線２１と交叉する斜線１本当
りの交叉角は大きくなり、回転軸７の小さな回転
角は軸方向の大きな変位となつて表れる。したが
つて、回転角が小さい場合であつても、ラインセ
ンサ６が高密度でなくても、ラインセンサ６があ
たかも複数個存在するように機能し、軸方向の変
位は十分に読み取ることができ、高精度な正確な
測定が可能となる。 That is, in FIGS. 1 and 3, the rotating shaft 7 is
Since two sawtooth wave-like diagonal lines are printed during rotation, the crossing angle of each diagonal line that intersects the straight line 21 in FIG. This appears as a large displacement. Therefore, even if the rotation angle is small, even if the line sensors 6 are not densely packed, the line sensors 6 function as if there were a plurality of them, and the displacement in the axial direction can be sufficiently read. , it becomes possible to perform highly accurate and accurate measurements.
なお、上記の説明では、鋸歯状波的な斜線１組
について説明したが、これは、第３図に示すよう
に、互い平行な多数の直線（３−１），（３−
２），……（３−ｎ）からなる複数組の鋸歯状波
的な斜線から構成される明暗の縞模様を用いても
良い。 In the above explanation, one set of sawtooth diagonal lines was explained, but as shown in FIG.
2), . . . (3-n), a bright and dark striped pattern composed of a plurality of sets of sawtooth wave-like diagonal lines may be used.
以上説明したごとく上記構成によれば、円周方
向の回転角を回転軸と同方向の値に大きく変換し
て読み取ることが出来るので、ラインセンサを用
いた回転体の位相角等の計測において、使用され
る光学系等の焦点深度に影響されることなく小さ
な回転角も高精度で正確な測定値が得られその工
業的価値は大である。 As explained above, according to the above configuration, the rotation angle in the circumferential direction can be largely converted into a value in the same direction as the rotation axis and read, so when measuring the phase angle of a rotating body using a line sensor, High precision and accurate measurement values can be obtained even at small rotation angles without being affected by the depth of focus of the optical system used, and its industrial value is great.
第１図は、本考案の一実施例である回転角計測
装置の構成図、第２図はその原理を示すものであ
り、同ａはシールの平面図、同ｂは同装置の特性
図、第３図は同装置の他のシール例の説明図であ
る。
１……回転物体、２……回転軸、３……シー
ル、５……ハーフミラー、６……ラインセンサ、
１０……トリガパルス発生器、１１……読取器、
１２……表示装置。
Fig. 1 is a configuration diagram of a rotation angle measuring device that is an embodiment of the present invention, and Fig. 2 shows its principle, in which a is a plan view of a seal, b is a characteristic diagram of the device, FIG. 3 is an explanatory diagram of another seal example of the same device. 1... Rotating object, 2... Rotating axis, 3... Seal, 5... Half mirror, 6... Line sensor,
10...Trigger pulse generator, 11...Reader,
12...Display device.
Claims (1)
同一回転軸上に配設された円筒若しくは円柱の表
面に設けられ、かつ前記回転の円周方向の直線の
表示を有するとともに前記回転軸と交叉する方向
に鋸歯状波的な複数本の直線の表示を有するシー
ルと、前記回転軸に沿う方向に配置されたライン
センサとを備え、かつ前記シールに光を照射し、
その反射光を前記ラインセンサを用いて読みとる
ようにしたことを特徴とする回転角度計測装置。 a rotating body; and a cylinder or column that rotates in synchronization with the rotating body and is disposed on the same rotational axis, and is provided on the surface of a cylinder or column, and has a linear representation in the circumferential direction of the rotation and the rotational axis. a seal having a plurality of straight lines in the form of sawtooth waves in a direction intersecting with the axis of rotation, and a line sensor disposed in a direction along the axis of rotation, and irradiating the seal with light,
A rotation angle measuring device characterized in that the reflected light is read using the line sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6237181U JPS6143203Y2 (en) | 1981-04-28 | 1981-04-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6237181U JPS6143203Y2 (en) | 1981-04-28 | 1981-04-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57175006U JPS57175006U (en) | 1982-11-05 |
| JPS6143203Y2 true JPS6143203Y2 (en) | 1986-12-06 |
Family
ID=29858563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6237181U Expired JPS6143203Y2 (en) | 1981-04-28 | 1981-04-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6143203Y2 (en) |
-
1981
- 1981-04-28 JP JP6237181U patent/JPS6143203Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57175006U (en) | 1982-11-05 |
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