JPS63314468A - Rotational speed detector - Google Patents
Rotational speed detectorInfo
- Publication number
- JPS63314468A JPS63314468A JP15176887A JP15176887A JPS63314468A JP S63314468 A JPS63314468 A JP S63314468A JP 15176887 A JP15176887 A JP 15176887A JP 15176887 A JP15176887 A JP 15176887A JP S63314468 A JPS63314468 A JP S63314468A
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- rotational speed
- sensor
- sensing
- detector
- 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
- 230000001788 irregular Effects 0.000 claims description 2
- 239000002184 metal Substances 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、車輌の車輪等の回転速度と回転方向の検出
に用いる検出器に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a detector used for detecting the rotational speed and rotational direction of a wheel or the like of a vehicle.
［従来の技術〕
周知の回転速度検出器の代表的なものとしては、磁気式
の歯車検出器がある。この検出器は、例えば車軸に取付
ける金属歯車と、その歯車の歯部に近接配置する磁気セ
ンサとで構成され、歯車の回転により磁気センサに発生
する誘導起電力もしくは磁気抵抗素子の抵抗変化を検出
して単位時間当りの検出数から歯車と一体回転する車輪
の回転速度を求めるようにしである。[Prior Art] A typical example of a well-known rotational speed detector is a magnetic gear detector. This detector consists of, for example, a metal gear attached to the axle and a magnetic sensor placed close to the teeth of the gear, and detects the induced electromotive force generated in the magnetic sensor or the resistance change of the magnetic resistance element due to the rotation of the gear. The rotational speed of the wheel that rotates integrally with the gear is determined from the number of detections per unit time.
従来の回転速度検出器に用いられている歯車ロータは、
同一形状の歯を同一ピッチで規則正しく配列し、これを
センサで感知するようにしであるが、このようなロータ
は、磁気センサ等を用いても回転方向は判別することが
できず、従って、その種のロータを用いた回転速度検出
器の用途が、回転速度の検出以外には、高精度検出器を
用いるにしても、せいぜい走行距離の測定に限定される
と云う問題があった。The gear rotor used in conventional rotational speed detectors is
Teeth of the same shape are regularly arranged at the same pitch and this is detected by a sensor, but the rotation direction of such a rotor cannot be determined even with a magnetic sensor, etc. There is a problem in that the application of a rotational speed detector using a rotor of this kind is limited to, at best, measuring distance traveled other than for detecting rotational speed, even if a high-precision detector is used.
そこで、この発明は、検出器の用途を拡大するために、
回転速度検出と、回転方向検出の両機能を併せもつ検出
器を実現することを目的としている。Therefore, in order to expand the uses of the detector, this invention
The aim is to realize a detector that has both the functions of detecting rotational speed and rotational direction.
この発明は、被測定物と一体的に回転させるロータの非
接触式センサによる感知部と非感知部、例えば金属歯車
ロータにおいては歯と歯溝の正転方向と逆転方向の配列
パターンを不規則にし、これにより正転時、逆転時の出
力信号パターンを異ならしめて上記の目的を達成する。This invention provides sensing and non-sensing parts of a rotor that rotates integrally with the object to be measured using a non-contact sensor, for example, in a metal gear rotor, the arrangement pattern of teeth and tooth spaces in the forward and reverse directions is irregular. This achieves the above objective by making the output signal patterns different during forward rotation and reverse rotation.
即ち、ロータの一例として示した第１図の金属歯車１に
おいては、本来ならば、周方向に定ピツチでｎ個（図は
１２個）設ける歯２のうち、センサ３に対面した歯を１
番として右回りに３番目の歯とｎ−１及びｎ番目（図は
１）及び１２番目）の歯を欠落させて、センサ３に接続
した波形変換器４からの出力パルスの出かたを正転時と
逆転時で変化させるようにしである。That is, in the metal gear 1 shown in FIG. 1 as an example of a rotor, among the n teeth 2 (12 in the figure) provided at regular intervals in the circumferential direction, one tooth facing the sensor 3 is
The output pulse from the waveform converter 4 connected to the sensor 3 is shown by removing the third tooth and the n-1 and n-th teeth (1 and 12 in the figure) clockwise. It is designed to change between forward rotation and reverse rotation.
このようにしておくと、図の歯車１の場合、矢印ａ方向
への回転時には第２図（ａ）の順序で、ｂ方向回転時に
は同図（ｂｌの順序で出力パルスが取り出され、出力パ
ルスの出ない（イ）部と（ロ）部の現われ方の順番がａ
、ｂのケースで逆になるため、この変化から回転方向を
判別することができる。In the case of gear 1 shown in the figure, when rotating in the direction of arrow a, the output pulses are taken out in the order shown in Fig. 2 (a), and when rotating in the direction of arrow b, the output pulses are taken out in the order shown in Fig. 2 (bl). The order in which parts (a) and (b) appear is a.
, b, the rotation direction can be determined from this change.
また、回転速度も単位時間当りの出力パルス数から求め
ることができる。Further, the rotation speed can also be determined from the number of output pulses per unit time.
第３図は、定ピツチで並んだ歯２の間に２′の歯を付加
して正転、逆転方向の配列パターンを変えたもので、こ
のような歯車でも同一効果が得られる。In FIG. 3, the arrangement pattern in the forward and reverse directions is changed by adding teeth 2' between the teeth 2 arranged at a constant pitch, and the same effect can be obtained with such a gear.
なお、この発明に用いるロータは金属歯車に限定されな
い。即ち、使用するセンサの検出原理に応じた感知部と
非感知部を周方向に交互に設けたロータであれば、歯部
と歯溝がなくても、感知部と非感知部の右回りと左回り
の配列バクーンを変えることによって発明の目的を達成
し得る。Note that the rotor used in this invention is not limited to a metal gear. In other words, if the rotor has sensing parts and non-sensing parts arranged alternately in the circumferential direction according to the detection principle of the sensor used, even if there are no teeth and tooth grooves, the sensing part and non-sensing part can rotate clockwise. The object of the invention can be achieved by changing the counterclockwise arrangement Bakun.
以上述べたように、この発明の検出器は、ロータ側に形
成される感知部と非感知部の正転方向と逆転方向の配列
パターンを変化させてセンサからの出力パルスの出かた
を正転時と逆転時とで異ならしめたので、回転速度、回
転方向の両方を検出することができ、その用途が広がる
と云う効果が得られる。用途の一例としては、磁気方位
センサと車輪速度検出器を用いて地図上の自己の位置を
知る自動車のナビゲーションシステムの場合、磁気方位
センサに異常があると現在地の判断が困難になるが、こ
のようなときに、前進、後退を判断して位置の狂いを少
なくすると云った利用のしかたが考えられる。As described above, the detector of the present invention corrects the way the output pulses are output from the sensor by changing the arrangement pattern of the sensing part and the non-sensing part formed on the rotor side in the forward and reverse directions. Since the rotating speed and the rotating direction are different, both the rotational speed and the rotational direction can be detected, which has the effect of widening the range of uses. An example of an application is a car navigation system that uses a magnetic direction sensor and wheel speed detector to determine its own location on a map.If there is an abnormality in the magnetic direction sensor, it becomes difficult to determine the current location. In such cases, one possible use would be to judge whether to move forward or backward to reduce positional deviations.
第１図は、この発明の検出器の一例を示す正面図、第２
図の（８）、ｆｂ）は、第１図の検出器の歯車がａ方向
及びｂ方向に回転したときに得られる出力パルスの波形
を示す図、第３図は歯車の変形例を示す正面図である。
１・・・・・・金属歯車、２．２′・・・・・・歯、３
・・・・・・センサ、４・・・・・・波形変換器。FIG. 1 is a front view showing an example of the detector of the present invention, and FIG.
Figures (8) and fb) are diagrams showing the waveforms of output pulses obtained when the gear of the detector in Figure 1 rotates in directions a and b, and Figure 3 is a front view showing a modified example of the gear. It is a diagram. 1... Metal gear, 2.2'... Teeth, 3
...Sensor, 4...Waveform converter.
Claims (2)
接配置する非接触式センサとを具備し、上記ロータには
上記センサによる感知部と非感知部が周方向に交互に設
けられている回転速度検出器において、上記ロータの感
知部及び非感知部の配列パターンを不規則にすることに
よって正転方向と逆転方向とで出力信号パターンが異な
るようにしたことを特徴とする回転速度検出器。(1) The rotor is equipped with a rotor that rotates integrally with the object to be measured, and a non-contact sensor placed close to the rotor, and the rotor is provided with sensing parts and non-sensing parts by the sensor alternately in the circumferential direction. A rotation speed detector characterized in that the arrangement pattern of sensing parts and non-sensing parts of the rotor is made irregular so that the output signal pattern is different in the forward rotation direction and the reverse rotation direction. Detector.
歯部と歯溝であることを特徴とする特許請求の範囲第（
１）項記載の回転速度検出器。(2) The sensing portion and the non-sensing portion of the rotor are teeth and tooth grooves of a gear rotor.
The rotational speed detector described in item 1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15176887A JPS63314468A (en) | 1987-06-17 | 1987-06-17 | Rotational speed detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15176887A JPS63314468A (en) | 1987-06-17 | 1987-06-17 | Rotational speed detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63314468A true JPS63314468A (en) | 1988-12-22 |
Family
ID=15525869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15176887A Pending JPS63314468A (en) | 1987-06-17 | 1987-06-17 | Rotational speed detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63314468A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2332060A (en) * | 1997-12-05 | 1999-06-09 | Ford Global Tech Inc | Speed, direction and acceleration sensor for a rotating shaft |
| US5977764A (en) * | 1997-12-05 | 1999-11-02 | Ford Global Technologies, Inc. | Method to sense speed, direction and acceleration for a rotating shaft using a rotor with unequal tooth spacing |
-
1987
- 1987-06-17 JP JP15176887A patent/JPS63314468A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2332060A (en) * | 1997-12-05 | 1999-06-09 | Ford Global Tech Inc | Speed, direction and acceleration sensor for a rotating shaft |
| US5977764A (en) * | 1997-12-05 | 1999-11-02 | Ford Global Technologies, Inc. | Method to sense speed, direction and acceleration for a rotating shaft using a rotor with unequal tooth spacing |
| GB2332060B (en) * | 1997-12-05 | 2002-02-20 | Ford Global Tech Inc | Speed, direction and acceleration sensor for a rotating shaft |
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