JPS6022667A - Rotation number sensor - Google Patents
Rotation number sensorInfo
- Publication number
- JPS6022667A JPS6022667A JP13016783A JP13016783A JPS6022667A JP S6022667 A JPS6022667 A JP S6022667A JP 13016783 A JP13016783 A JP 13016783A JP 13016783 A JP13016783 A JP 13016783A JP S6022667 A JPS6022667 A JP S6022667A
- Authority
- JP
- Japan
- Prior art keywords
- encoder
- emitting element
- optical fiber
- light
- light emitting
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/486—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by photo-electric detectors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Transform (AREA)
Abstract
Description
【発明の詳細な説明】 本発明は光学的回転数センサに係る。[Detailed description of the invention] The present invention relates to an optical rotation speed sensor.
近年、自動車の高度の電装化に伴ない自動車の運転制御
に係わる情報全収集し、これらの情報によって演算処理
して自動車を運行制御することが行なわれるようになっ
た。このため自動車の運転状況に係わる更に高度の情報
を収集する各種計測装置ならびにこれらり情報によって
運転制御する制御装置が開発されている。このような計
測装置の一つとして自動車のエンジンや車輪の回転数を
測定する回転数センサが開発されている。現在もエンコ
ーダに、細隙に対向して配置した一対の光ファイバを用
いた光学的回転数センサもおるが、コスト的に高く改良
の余地があるものでおる。In recent years, as automobiles have become more highly electrically equipped, it has become possible to collect all information related to automobile driving control and perform arithmetic processing on this information to control the operation of automobiles. For this reason, various measuring devices that collect more sophisticated information regarding the driving conditions of automobiles and control devices that control driving based on this information have been developed. As one such measuring device, a rotation speed sensor that measures the rotation speed of an automobile engine or wheels has been developed. Currently, there are optical rotation speed sensors in encoders that use a pair of optical fibers placed opposite to each other in a narrow gap, but these sensors are expensive and leave room for improvement.
本発明は構造も簡単でオシコスト的に安価でかつ耐久性
も勝れた光学的口伝数センサを提供することを目的とす
る。SUMMARY OF THE INVENTION An object of the present invention is to provide an optical word-of-mouth number sensor that has a simple structure, is inexpensive in terms of cost, and has excellent durability.
かかる目的を達成した本発明による回転数センサの構成
は、被測回転体の回転によって駆動される円板の周辺に
等間隔に複数個の細孔を配置したエンコーダと、該エン
コーダの細孔に関し対向して配置された耐熱性発光素子
と、該耐熱性発光素子の光を受光する光ファイIく先端
部を備えた光ファイバと、該光ファイノくの基部に光学
的に結合された受光素子と、該受光素子の検出出力を処
理して上記被測回転体の回転数に比例した。信号を出力
する検出回路部からなることを特徴とする←Oでbる。The configuration of the rotation speed sensor according to the present invention that achieves the above object includes an encoder in which a plurality of pores are arranged at equal intervals around a disk driven by the rotation of a rotating body to be measured, and a plurality of pores in the encoder. A heat-resistant light-emitting element arranged to face each other, an optical fiber having a tip end portion of an optical fiber that receives light from the heat-resistant light-emitting element, and a light-receiving element optically coupled to the base of the optical fiber. Then, the detection output of the light receiving element was processed to be proportional to the rotational speed of the rotating body to be measured. It is characterized by comprising a detection circuit unit that outputs a signal.
本発明による回転数センサを一つの実施例の図面を参照
しながら説明する。図は本発明による回転数センサの構
造モネす斜視図でるる。A rotation speed sensor according to the present invention will be explained with reference to the drawings of one embodiment. The figure is a perspective view showing the structure of the rotation speed sensor according to the present invention.
図において、回転数に比例した情報を発生するエンコー
ダlは被回転体を駆動する回転シャフト2に取付けられ
ている円板であって、エンコーダの円板の円周にそって
等間隔に配置されたn個の細孔3がるる。エンコーダl
の細孔3の位置に対向して耐熱性発光素子例えば白熱ラ
ンプ4とエンコーダの細孔3を通じて白熱ランプからの
光を受光する光ファイバ5の先端部5aが配置されてい
る。従って、エンコーダ1回転で光ファイバ5 Fi、
n個の光パルスを観測する。In the figure, an encoder l that generates information proportional to the number of rotations is a disk attached to a rotating shaft 2 that drives a rotated object, and is arranged at equal intervals along the circumference of the encoder disk. There are n pores 3. encoder l
A heat-resistant light emitting element such as an incandescent lamp 4 and a distal end portion 5a of an optical fiber 5 that receives light from the incandescent lamp through the pore 3 of an encoder are arranged opposite to the pore 3 of the encoder. Therefore, with one rotation of the encoder, the optical fiber 5 Fi,
Observe n light pulses.
また、エンコーダの一回転で回転数を検知することがで
きる。光ファイバ5の基部には光ファイバ5と光学的に
結合された受光素子6が配置されている。また受光素子
6は検出信号をプリント基板上に構成された検出回路部
7へ入力する。検出回路部7は検出信号を処理して被回
転体の回転数に換算した回転数信号を出力する。Furthermore, the rotational speed can be detected with one revolution of the encoder. A light receiving element 6 optically coupled to the optical fiber 5 is arranged at the base of the optical fiber 5 . Further, the light receiving element 6 inputs a detection signal to a detection circuit section 7 configured on a printed circuit board. The detection circuit section 7 processes the detection signal and outputs a rotation speed signal converted into the rotation speed of the rotating body.
この回転数信号は表示装置に数字あるいは棒グラフ状表
示で回転数表示を与えることができる。This rotational speed signal can be used to display the rotational speed in the form of numbers or bar graphs on a display device.
従って、車輪の回転数であれば、直ちに車速に換算して
表示でき、車速センサとなる、回転数センサのエンコー
ダが車輪の駆動軸に直結さnるような場合は駆動@周辺
は、走行中は可成シ高温になり密封されたケース内に納
められたエンコーダの周辺は熱的に厳しい環境にあるの
で、か\る環境ではLEDの様な半導体素子は特性が変
化し長期にわたっての安定した動作が期待されない。従
来のものでエンコーダをはさんで2つの光ファイバを対
向させた構造のものもあるが、光ファイバの光軸ずれ等
で感度が敏感に左右されることや光フアイバ自体高価で
おシコスト的に高くなることは避けられなかった。しか
るに本発明の回転数センサーはれば、エンコーダに近接
してこのような環境で熱的に安定な耐熱性発光素子例え
ば白熱ラングを配置するものでロシ、環境の温度の影響
を受けることなく、光ファイバ5との光学的結合も容易
な利点がらる。又受光素子6と受光端の間は光ファイバ
5が受光信号を伝送しているため外来の雑音に対しても
影響されない。また従来の光ファイバを送受光線路とし
て使用したものに比較しては送光用光フアイバ全使用し
ないため価格の点でよシ安価でる9、光フアイバ間の光
結合の調整等も不用で構造的に堅牢であり耐久性がある
。Therefore, if it is the rotation speed of a wheel, it can be immediately converted to vehicle speed and displayed.If the encoder of the rotation speed sensor, which is the vehicle speed sensor, is directly connected to the drive shaft of the wheel, the drive @ surrounding area is The environment around the encoder, which is housed in a sealed case, is in a thermally harsh environment, and the characteristics of semiconductor devices such as LEDs change, making it difficult to maintain stability over a long period of time. No action is expected. Some conventional structures have two optical fibers facing each other with an encoder sandwiched between them, but sensitivity is sensitively affected by optical axis misalignment of the optical fibers, and the optical fibers themselves are expensive and cost-effective. It was inevitable that it would rise. However, the rotation speed sensor of the present invention has a heat-resistant light emitting element, such as an incandescent lamp, that is thermally stable in such an environment, and is not affected by the temperature of the environment. It also has the advantage of being easy to optically couple with the optical fiber 5. Furthermore, since the optical fiber 5 transmits the received light signal between the light receiving element 6 and the light receiving end, it is not affected by external noise. In addition, compared to conventional optical fibers that use optical fibers as transmitting/receiving lines, it is much cheaper in terms of price because it does not use all optical fibers for transmitting light9, and there is no need to adjust the optical coupling between optical fibers. It is robust and durable.
本発明の実施例では耐熱性発光素子に白熱ランプ全使用
したが、これに限られるものではなく、光ファイバが赤
外線を低い損失で伝送するものでおれば電熱線のような
渉外線発生器でもよい。In the embodiments of the present invention, all incandescent lamps were used for the heat-resistant light emitting elements, but the invention is not limited to this, and as long as the optical fiber transmits infrared rays with low loss, a crosstalk generator such as a heating wire may also be used. good.
図は本発明による回転数センサの斜視図である。
図において、
1はエンコーダ、2は回転シャフト、3は細孔、4は耐
熱性発光素子、5は光ファイバ、6は受光素子、7は検
出回路°部である。
特許出願人 住友′Iに気工業株式会社代理人 弁理士
光石士部(他1名)The figure is a perspective view of a rotational speed sensor according to the invention. In the figure, 1 is an encoder, 2 is a rotating shaft, 3 is a pore, 4 is a heat-resistant light emitting element, 5 is an optical fiber, 6 is a light receiving element, and 7 is a detection circuit section. Patent applicant: Sumitomo 'I Niki Kogyo Co., Ltd. Agent: Patent attorney: Shibu Mitsuishi (and one other person)
Claims (1)
隔に複数個の細孔を配置したエンコーダと、該エンコー
ダの細孔に関し対向して配置された耐熱性発光素子と、
該耐熱性発光素子の光を受光する先端部を備えた光ファ
イバと、該光ファイバの基部に光学的に結合された受光
素子と、該受光素子の検出出力を処理して、上記被測回
転体の回転数に比例した信号を得る検出回路部からなる
ことを特徴とする回転数センサ。an encoder having a plurality of pores arranged at equal intervals around a disk driven by the rotation of a rotating body to be measured; a heat-resistant light emitting element disposed opposite to each other with respect to the pores of the encoder;
an optical fiber having a tip that receives light from the heat-resistant light-emitting element; a light-receiving element optically coupled to the base of the optical fiber; and a detection output of the light-receiving element being processed to detect the rotation to be measured. A rotation speed sensor comprising a detection circuit section that obtains a signal proportional to the rotation speed of a body.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13016783A JPS6022667A (en) | 1983-07-19 | 1983-07-19 | Rotation number sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13016783A JPS6022667A (en) | 1983-07-19 | 1983-07-19 | Rotation number sensor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6022667A true JPS6022667A (en) | 1985-02-05 |
Family
ID=15027616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13016783A Pending JPS6022667A (en) | 1983-07-19 | 1983-07-19 | Rotation number sensor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6022667A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0683441A (en) * | 1992-01-06 | 1994-03-25 | Samsung Electron Co Ltd | Moving robot having navigation system utilizing inertia |
-
1983
- 1983-07-19 JP JP13016783A patent/JPS6022667A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0683441A (en) * | 1992-01-06 | 1994-03-25 | Samsung Electron Co Ltd | Moving robot having navigation system utilizing inertia |
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