JPH04331370A - Rotational speed detector - Google Patents
Rotational speed detectorInfo
- Publication number
- JPH04331370A JPH04331370A JP13063291A JP13063291A JPH04331370A JP H04331370 A JPH04331370 A JP H04331370A JP 13063291 A JP13063291 A JP 13063291A JP 13063291 A JP13063291 A JP 13063291A JP H04331370 A JPH04331370 A JP H04331370A
- Authority
- JP
- Japan
- Prior art keywords
- rotational speed
- rotation
- disc
- sensors
- roller
- 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 25
- 238000000034 method Methods 0.000 abstract description 2
- 238000012935 Averaging Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000004043 responsiveness Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Landscapes
- Optical Transform (AREA)
Abstract
Description
【0001】0001
【産業上の利用分野】本発明は、例えばシャシダイナモ
メータ装置のローラなど回転する被測定体の回転速度を
検出する装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting the rotational speed of a rotating object to be measured, such as a roller of a chassis dynamometer device.
【0002】0002
【従来の技術】回転する被測定体の回転速度を検出する
のに、従来は図3に示すように、被測定体としての回転
軸31にこれと共に回転する円板32を滑りが生じない
ように取り付け、この円板32の全周縁に複数のスリッ
ト33を等間隔に設けると共に、光源34と光センサ3
5とを前記円板32の両側に互いに対向するように配置
し、円板32の回転に伴ってスリット33が移動するこ
とによって生じるパルス信号を回転速度信号に変換する
ようにしていた。2. Description of the Related Art In order to detect the rotational speed of a rotating object to be measured, as shown in FIG. 3, conventionally, as shown in FIG. A plurality of slits 33 are provided at equal intervals around the entire circumference of this disc 32, and a light source 34 and a light sensor 3 are attached to the disc 32.
5 are arranged on both sides of the disc 32 so as to face each other, and a pulse signal generated by the movement of the slit 33 as the disc 32 rotates is converted into a rotational speed signal.
【0003】0003
【発明が解決しようとする課題】しかしながら、■前記
円板32に複数のスリット33を互いに同形かつ等間隔
に設けることが困難であること、■組立時、円板32の
回転中心に回転軸31を通したり、円板32を回転軸3
1に対して直角に取り付けるのが困難であること、など
の理由により、回転軸31が一定に回転しているときに
おいても、ワウ(低い周波数変動)が生じ、そのため、
あたかも変動しているかのような回転速度信号が取り出
されることがあった。すなわち、図4に示すように、回
転速度信号に、互いに異なる誤差時間Δt1 , Δt
2 , Δt3 が生じ、その結果、検出される回転速
度に誤差が含まれることがあった。[Problems to be Solved by the Invention] However, (1) it is difficult to provide the plurality of slits 33 in the disk 32 in the same shape and at equal intervals; (2) during assembly, the rotation axis 31 is located at the center of rotation of the disk 32; or pass the disc 32 through the rotating shaft 3.
Due to the difficulty of mounting the rotary shaft 31 perpendicularly to the rotary shaft 31, wow (low frequency fluctuation) occurs even when the rotating shaft 31 is constantly rotating.
In some cases, a rotational speed signal that appeared to be fluctuating was obtained. That is, as shown in FIG. 4, the rotational speed signal has different error times Δt1 and Δt
2, Δt3, and as a result, the detected rotational speed may include an error.
【0004】本発明は、上述の事柄に留意してなされた
もので、その目的とするところは、回転する被測定体の
回転速度を精度よく測定できる装置を提供することにあ
る。The present invention has been made with the above-mentioned considerations in mind, and its object is to provide an apparatus that can accurately measure the rotational speed of a rotating object to be measured.
【0005】[0005]
【課題を解決するための手段】上記目的を達成するため
、本発明に係る回転速度検出装置は、被測定体と共に回
転する回転体に対して複数の回転検出センサを幾何学的
に均等に配置し、これらの回転検出センサによってそれ
ぞれ得られる出力の平均値に基づいて前記被測定体の回
転速度を求めるようにしている。[Means for Solving the Problems] In order to achieve the above object, a rotation speed detection device according to the present invention has a plurality of rotation detection sensors arranged geometrically evenly on a rotating body that rotates together with an object to be measured. However, the rotational speed of the object to be measured is determined based on the average value of the outputs respectively obtained by these rotation detection sensors.
【0006】[0006]
【作用】前記構成の回転速度検出装置においては、被測
定体と共に回転する回転体に対して複数の回転検出セン
サを幾何学的に均等に配置し、各回転検出センサからの
回転速度信号を平均化して回転速度としているので検出
値の変動が少なく、特に、並列的(同時)に検出された
回転速度信号を平均化しているので、速度検出の応答性
がよい。[Operation] In the rotation speed detection device having the above configuration, a plurality of rotation detection sensors are geometrically evenly arranged on the rotating body that rotates together with the object to be measured, and the rotation speed signals from each rotation detection sensor are averaged. Since the rotational speed is calculated as the rotational speed, there is little variation in the detected value.In particular, since the rotational speed signals detected in parallel (simultaneously) are averaged, the responsiveness of speed detection is good.
【0007】[0007]
【実施例】以下、本発明の一実施例を図面を参照しなが
ら説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
【0008】先ず、図2は、本発明に係る回転速度検出
装置を適用したシャシダイナモメータ装置の構成を概略
的に示すもので、この図において、1は図外の試験車両
の駆動車輪2が載置されるローラ(被測定体の一例)で
ある。3はこのローラ1との間に滑りが生じないように
ローラ1を取り付けた回転軸で、ベース4に適宜の間隔
をおいて設けられた軸受部5によって水平に保持されて
いる。6は継手部7を介して回転軸3の一端に機械的に
接続されるフライホイールで、8は軸受部材である。First, FIG. 2 schematically shows the configuration of a chassis dynamometer device to which a rotational speed detection device according to the present invention is applied. This is a roller (an example of an object to be measured) to be placed. Reference numeral 3 denotes a rotating shaft to which the roller 1 is attached so as to prevent slippage between the roller 1 and the roller 1, and is held horizontally by bearings 5 provided on the base 4 at appropriate intervals. 6 is a flywheel mechanically connected to one end of the rotating shaft 3 via a joint portion 7, and 8 is a bearing member.
【0009】9はローラ1の他端側に設けられ、ローラ
1を制動するためのブレーキ装置で、ローラ1と一体的
に回転または停止するようにローラ1に取り付けられた
円板10とこの円板10を挟持してこれに制動力を作用
させるブレーキユニット11とからなる。そして、12
はローラ1の他端側に設けられ、ローラ1の回転速度を
検出するための回転速度検出装置で、その構成の一例を
図1に示す。Reference numeral 9 denotes a brake device provided on the other end side of the roller 1 for braking the roller 1, which is connected to a disc 10 attached to the roller 1 so as to rotate or stop integrally with the roller 1. It consists of a brake unit 11 that clamps a plate 10 and applies braking force to it. And 12
is a rotational speed detection device provided on the other end side of the roller 1 to detect the rotational speed of the roller 1, and an example of its configuration is shown in FIG.
【0010】図1において、13は回転軸3と一体的に
回転または停止するように回転軸3に取り付けられた円
板(回転体の一例)で、この円板13の全周縁には複数
のスリット14が等間隔に設けられている。そして、円
板13の近傍には光源15と光検出器16とからなる複
数の回転検出センサ17が幾何学的に均等に、つまり、
回転軸3を中心として点対象の位置に配置されている。In FIG. 1, reference numeral 13 denotes a disc (an example of a rotary body) attached to the rotary shaft 3 so as to rotate or stop integrally with the rotary shaft 3, and the entire periphery of this disc 13 has a plurality of Slits 14 are provided at equal intervals. In the vicinity of the disk 13, a plurality of rotation detection sensors 17 consisting of a light source 15 and a photodetector 16 are arranged geometrically evenly.
They are arranged point-symmetrically with the rotation axis 3 as the center.
【0011】すなわち、円板13の一方の側には複数(
図示例では4個)の光源15がスリット14に臨みかつ
点対称になるように配置され、他方の側には光源15と
それぞれ対向し、スリット14を経た光を受光する位置
に光源15と同数の光検出器16が配置されている。前
記光源15としては、例えば発光ダイオードやタングス
テンランプなどを用いることができ、また、光検出器1
6としては、フォトトランジスタやフォトダイオードな
どを用いることができる。That is, on one side of the disk 13 there are a plurality of (
In the illustrated example, four light sources 15 are arranged facing the slit 14 and point symmetrical, and on the other side, facing the light sources 15, the same number of light sources 15 are placed at positions that receive the light that has passed through the slit 14. A photodetector 16 is arranged. As the light source 15, for example, a light emitting diode, a tungsten lamp, etc. can be used, and the photodetector 1
As 6, a phototransistor, a photodiode, or the like can be used.
【0012】18は前記4つの光検出器16の出力側に
それぞれ設けられる例えば周期演算型の回転速度計、1
9は各回転速度計18の出力を算術平均する平均値計算
回路である。Reference numeral 18 denotes, for example, a periodic calculation type tachometer, which is provided on the output side of the four photodetectors 16, respectively.
Reference numeral 9 denotes an average value calculation circuit that arithmetic averages the outputs of the respective rotational speed meters 18.
【0013】上記構成のシャシダイナモメータ装置にお
いては、ローラ1およびフライホイール6を試験車両の
駆動車輪2で加速して回転させることにより、所定の試
験が行われるが、このとき、円板13がローラ1と共に
回転することにより、4つの回転速度計18からそれぞ
れ回転速度信号が出力され、この回転速度信号は平均値
計算回路19に入力されて算術平均され、この平均値計
算回路19から最終的な回転速度信号が出力され、これ
を適宜処理することにより、ローラ1の回転速度を得る
ことができる。In the chassis dynamometer device having the above configuration, a prescribed test is carried out by accelerating and rotating the roller 1 and the flywheel 6 by the driving wheels 2 of the test vehicle. By rotating together with the roller 1, rotational speed signals are output from each of the four tachometers 18, and these rotational speed signals are input to an average value calculation circuit 19, where they are arithmetic averaged, and from this average value calculation circuit 19, a final signal is output. A rotational speed signal is output, and by processing this as appropriate, the rotational speed of the roller 1 can be obtained.
【0014】上記構成の回転速度検出装置によれば、ロ
ーラ1の回転軸3と共に回転する円板13に対して4個
の回転検出センサ17を幾何学的に均等に配置し、各回
転検出センサ17からの回転速度信号を平均化して回転
速度としているので検出値の変動が少なく、特に、並列
的(同時)に検出された回転速度信号を平均化している
ので、速度検出の応答性がよい。従って、回転軸1の回
転速度を精度よく、しかも、応答性よく検出できる。な
お、回転検出センサ17は、円板13に対して幾何学的
に均等に配置してあれば、上記4個に限られるものでは
ないことは勿論である。According to the rotation speed detection device having the above configuration, four rotation detection sensors 17 are geometrically evenly arranged on the disk 13 that rotates together with the rotation shaft 3 of the roller 1, and each rotation detection sensor Since the rotation speed signals from 17 are averaged to obtain the rotation speed, there is little variation in the detected value.In particular, since the rotation speed signals detected in parallel (simultaneously) are averaged, the responsiveness of speed detection is good. . Therefore, the rotational speed of the rotating shaft 1 can be detected with high precision and responsiveness. It goes without saying that the number of rotation detection sensors 17 is not limited to the above four as long as they are arranged geometrically evenly with respect to the disk 13.
【0015】本発明は上述の実施例に限られるものでは
なく、回転体の周囲に複数のギヤを等間隔に設け、この
ギヤの山を検出する方式のものや、回転体の表面に磁石
を等間隔に設け、これを磁気センサによって感知する方
式のものにも適用することができる。The present invention is not limited to the above-described embodiments, but may also include a method in which a plurality of gears are provided at equal intervals around a rotating body and the peaks of the gears are detected, or a magnet is placed on the surface of the rotating body. It can also be applied to a system in which they are provided at equal intervals and detected by a magnetic sensor.
【0016】[0016]
【発明の効果】以上説明したように、本発明によれば、
回転する被測定体の回転速度を、ワウの影響を受けるこ
となく、精度よく、しかも、応答性よく検出することが
できる。そして、本発明に係る回転速度検出装置は、回
転速度の変化を調べるような場合、特に有用である。[Effects of the Invention] As explained above, according to the present invention,
The rotational speed of a rotating object to be measured can be detected with high accuracy and responsiveness without being affected by wow. The rotational speed detection device according to the present invention is particularly useful when examining changes in rotational speed.
【図1】本発明に係る回転速度検出装置の一例を概略的
に示す図である。FIG. 1 is a diagram schematically showing an example of a rotational speed detection device according to the present invention.
【図2】前記回転速度検出装置を組み込んだシャシダイ
ナモメータ装置の要部を示す図である。FIG. 2 is a diagram showing a main part of a chassis dynamometer device incorporating the rotational speed detection device.
【図3】従来技術を示す図である。FIG. 3 is a diagram showing a prior art.
【図4】従来技術の欠点を説明するための図である。FIG. 4 is a diagram for explaining the drawbacks of the prior art.
3…回転軸、13…円板、17…回転検出センサ。 3...Rotation shaft, 13...Disc, 17...Rotation detection sensor.
Claims (1)
て複数の回転検出センサを幾何学的に均等に配置し、こ
れらの回転検出センサによってそれぞれ得られる出力の
平均値に基づいて前記被測定体の回転速度を求めるよう
にしたことを特徴とする回転速度検出装置。1. A plurality of rotation detection sensors are arranged geometrically evenly on a rotating body that rotates together with the measured object, and the measured object is detected based on the average value of the output obtained by each of these rotation detection sensors. A rotational speed detection device characterized in that the rotational speed of a body is determined.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13063291A JPH04331370A (en) | 1991-05-03 | 1991-05-03 | Rotational speed detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13063291A JPH04331370A (en) | 1991-05-03 | 1991-05-03 | Rotational speed detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04331370A true JPH04331370A (en) | 1992-11-19 |
Family
ID=15038892
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13063291A Pending JPH04331370A (en) | 1991-05-03 | 1991-05-03 | Rotational speed detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04331370A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1031838A2 (en) * | 1999-02-26 | 2000-08-30 | Kabushiki Kaisha Meidensha | Apparatus for measuring angular velocity variation rate of rotary axle |
CN110308300A (en) * | 2019-06-27 | 2019-10-08 | 厦门盈趣科技股份有限公司 | A kind of rotating speed measurement method and device merging multifrequency nature data |
-
1991
- 1991-05-03 JP JP13063291A patent/JPH04331370A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1031838A2 (en) * | 1999-02-26 | 2000-08-30 | Kabushiki Kaisha Meidensha | Apparatus for measuring angular velocity variation rate of rotary axle |
US6601011B1 (en) | 1999-02-26 | 2003-07-29 | Kabushiki Kaisha Meidensha | Apparatus for measuring angular velocity variation rate of rotary axle |
EP1031838A3 (en) * | 1999-02-26 | 2004-03-17 | Kabushiki Kaisha Meidensha | Apparatus for measuring angular velocity variation rate of rotary axle |
CN110308300A (en) * | 2019-06-27 | 2019-10-08 | 厦门盈趣科技股份有限公司 | A kind of rotating speed measurement method and device merging multifrequency nature data |
CN110308300B (en) * | 2019-06-27 | 2021-09-21 | 厦门盈趣科技股份有限公司 | Rotating speed measuring method and device fusing multiple characteristic data |
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