JPH0467153B2 - - Google Patents
Info
- Publication number
- JPH0467153B2 JPH0467153B2 JP9203983A JP9203983A JPH0467153B2 JP H0467153 B2 JPH0467153 B2 JP H0467153B2 JP 9203983 A JP9203983 A JP 9203983A JP 9203983 A JP9203983 A JP 9203983A JP H0467153 B2 JPH0467153 B2 JP H0467153B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- frequency
- voltage
- amplifier
- output
- 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 - Lifetime
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/001—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by measuring acceleration changes by making use of a triple differentiation of a displacement signal
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Gyroscopes (AREA)
Description
【発明の詳細な説明】
本発明は電動機等の回転体の速度を検出する加
速度検出装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an acceleration detection device for detecting the speed of a rotating body such as an electric motor.
一般に電動機等の回転速度を検出するには、例
えばパルスピツクアツプ、周波数−電圧変換器お
よび微分回路を組み合わせて行なう方法がある。
すなわち第１図に示すように電動機等の回転周波
数をパルスピツクアツプ１によつて検出し、その
検出周波数を周波数−電圧変換器２によつて電圧
に変換し、その出力電圧をオペアンプを用いた微
分回路３によつて微分して加速度検出信号を得る
方法が採られている。この方法において、周波数
−電圧変換器２の出力電圧は入力周波数と同じか
又はその周波数に比例した周波数のリツプル成分
を含む。この為微分回路３で微分すると前記リツ
プル成分を増幅した信号となつてしまい使いもの
にならない。そこで従来は第１図の回路にリツプ
ル成分除去用フイルター回路（図示省略）を付加
して応答性を低くする手段が講じられていた。し
かしこのように応答性を低くすると測定に必要な
信号レベルが得られなくなることが多い。 Generally, to detect the rotational speed of an electric motor, etc., there is a method that uses a combination of a pulse pickup, a frequency-voltage converter, and a differentiating circuit, for example.
That is, as shown in Fig. 1, the rotational frequency of an electric motor, etc. is detected by a pulse pickup 1, the detected frequency is converted to voltage by a frequency-voltage converter 2, and the output voltage is differentiated using an operational amplifier. A method is adopted in which the acceleration detection signal is obtained by differentiation by the circuit 3. In this method, the output voltage of the frequency-to-voltage converter 2 contains a ripple component with a frequency equal to or proportional to the input frequency. For this reason, when differentiated by the differentiating circuit 3, the signal becomes an amplified ripple component, making it useless. Conventionally, therefore, a measure has been taken to lower the response by adding a ripple component removal filter circuit (not shown) to the circuit shown in FIG. However, when the response is reduced in this way, it often becomes impossible to obtain the signal level necessary for measurement.
本発明は上記の点に鑑みなされたもので、加速
度検出信号のリツプル成分を除去することができ
るとともに測定に必要な大きな信号レベルが得ら
れる加速度検出装置を提供することを目的として
いる。 The present invention has been made in view of the above points, and it is an object of the present invention to provide an acceleration detection device that can remove the ripple component of an acceleration detection signal and obtain a large signal level necessary for measurement.
以下図面を参照しながら本発明の一実施例を説
明する。第２図において、１１ａ，１１ｂは電動
機等の回転周波数を同一パルス数で、波形比率
１：１で検出するパルスピツクアツプであり、例
えば電動機の所定の検出位置（図示省略）に互い
に180゜の位相差を持つて取り付けられている。１
２ａ，１２ｂはパルスピツクアツプ１１ａ，１１
ｂの検出信号を電圧信号に変換する周波数−電圧
変換器である。１３は周波数−電圧変換器１２
ａ，１２ｂの両出力信号を加算する増幅器であ
り、例えばオペアンプで構成されその利得は1/2
とする。 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 2, reference numerals 11a and 11b are pulse pickups that detect the rotational frequency of an electric motor, etc. with the same number of pulses and a waveform ratio of 1:1. They are installed with a phase difference. 1
2a, 12b are pulse pickups 11a, 11
This is a frequency-voltage converter that converts the detection signal of b into a voltage signal. 13 is a frequency-voltage converter 12
This is an amplifier that adds both output signals of a and 12b, and is composed of an operational amplifier, for example, and its gain is 1/2.
shall be.
この増幅器１３の出力信号は出力端子１５ｂに
おいて速度信号として取り出されるとともに、オ
ペアンプを用いた微分回路１４で微分されて出力
端子１５ａにおいて加速度信号として取り出され
る。尚２１，２２，２３，２４は抵抗を示し、２
５はコンデンサを示す。次に上記のように構成さ
れた回路の動作を第３図に示す信号波形図ととも
に説明する。いまパルスピツクアツプ１１ａ，１
１ｂで検出された信号Ａ，Ｂは互いに180゜の位相
差を有している。これら信号Ａ，Ｂを周波数−電
圧変換器１２ａ，１２ｂで電圧信号に変換する
と、その出力波形は各々Ｃ，Ｄに示す波形とな
る。これら両信号波形Ｃ，Ｄを増幅器１３で加算
すると、その出力波形はＥに示す波形となる。こ
の信号波形Ｅは速度信号として出力端子１５ｂに
取り出される。また信号波形Ｅを微分回路１４に
よつて微分すると、その出力波形はＦに示す波形
となる。このように互いに180゜の位相差を持つ信
号波形Ｃ，Ｄを1/2のゲインを持つ増幅器１３で
加算したのでリツプル成分の極めて少ない速度信
号波形Ｅが得られる。この結果速度信号波形Ｅを
微分して得た加速度信号Ｆにもリツプル成分はほ
とんど含まれない。 The output signal of this amplifier 13 is taken out as a speed signal at an output terminal 15b, and is also differentiated by a differentiating circuit 14 using an operational amplifier and taken out as an acceleration signal at an output terminal 15a. Note that 21, 22, 23, and 24 indicate resistance, and 2
5 indicates a capacitor. Next, the operation of the circuit configured as described above will be explained with reference to the signal waveform diagram shown in FIG. Now pulse pick up 11a, 1
Signals A and B detected at 1b have a phase difference of 180° from each other. When these signals A and B are converted into voltage signals by frequency-voltage converters 12a and 12b, the output waveforms become waveforms shown in C and D, respectively. When these two signal waveforms C and D are added by the amplifier 13, the output waveform becomes the waveform shown in E. This signal waveform E is taken out to the output terminal 15b as a speed signal. Further, when the signal waveform E is differentiated by the differentiating circuit 14, the output waveform becomes the waveform shown in F. In this way, since the signal waveforms C and D having a phase difference of 180 degrees are added by the amplifier 13 having a gain of 1/2, a speed signal waveform E having extremely few ripple components is obtained. As a result, the acceleration signal F obtained by differentiating the velocity signal waveform E also contains almost no ripple components.
以上のように本発明によれば、電動機等の回転
速度を180゜の位相差を持つ一対のパルスピツクア
ツプによつて検出し、それら検出信号に比例した
電圧信号を加算して速度信号を得るとともに、そ
の速度信号を微分して加速度信号を得るようにし
たので、検出信号のリツプル成分を著しく減少さ
せることができる。これによつて加速度信号の指
示計の指示が安定する。また従来のようにフイル
ター回路を使つて応答性を低下させる必要が無い
ので、測定に必要な大きな信号レベルが確保でき
る等の効果が得られる。 As described above, according to the present invention, the rotational speed of an electric motor, etc. is detected by a pair of pulse pickups having a phase difference of 180 degrees, and a voltage signal proportional to these detection signals is added to obtain a speed signal. Since the acceleration signal is obtained by differentiating the velocity signal, the ripple component of the detection signal can be significantly reduced. This stabilizes the indication of the acceleration signal on the indicator. Furthermore, since there is no need to reduce the response using a filter circuit as in the conventional method, it is possible to obtain effects such as ensuring a large signal level necessary for measurement.
第１図は従来の回転速度検出方法の一例を示す
回路図、第２図は本発明の一実施例を示す回路
図、第３図は第２図の回路の各部波形を示す信号
波形図である。
１１ａ，１１ｂ……パルスピツクアツプ、１２
ａ，１２ｂ……周波数−電圧変換器、１３……増
幅器、１４……微分回路。
Fig. 1 is a circuit diagram showing an example of a conventional rotation speed detection method, Fig. 2 is a circuit diagram showing an embodiment of the present invention, and Fig. 3 is a signal waveform diagram showing waveforms of each part of the circuit in Fig. 2. be. 11a, 11b...Pulse pickup, 12
a, 12b...Frequency-voltage converter, 13...Amplifier, 14...Differential circuit.
Claims (1)
る一対のパルスピツクアツプと、これらパルスピ
ツクアツプの両出力周波数を電圧信号に変換する
一対の周波数−電圧変換器と、これら周波数−電
圧変換器の両出力信号を加算する増幅器と、この
増幅器の出力信号を微分する微分回路とを備えた
ことを特徴とする加速度検出装置。1. A pair of pulse pickups that detect the speed of a rotating body with a phase difference of 180°, a pair of frequency-voltage converters that convert both output frequencies of these pulse pickups into voltage signals, and these frequency-voltage converters. What is claimed is: 1. An acceleration detection device comprising: an amplifier that adds both output signals; and a differentiation circuit that differentiates the output signal of the amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58092039A JPS59217167A (en) | 1983-05-25 | 1983-05-25 | Acceleration detecting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58092039A JPS59217167A (en) | 1983-05-25 | 1983-05-25 | Acceleration detecting apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59217167A JPS59217167A (en) | 1984-12-07 |
| JPH0467153B2 true JPH0467153B2 (en) | 1992-10-27 |
Family
ID=14043383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58092039A Granted JPS59217167A (en) | 1983-05-25 | 1983-05-25 | Acceleration detecting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59217167A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2500565B2 (en) * | 1992-05-18 | 1996-05-29 | 株式会社明電舎 | Angular acceleration measuring device |
-
1983
- 1983-05-25 JP JP58092039A patent/JPS59217167A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59217167A (en) | 1984-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4419897A (en) | Apparatus for harmonic oscillation analysis | |
| JPS5850397B2 (en) | Signal determination device that determines abnormal signals, etc. | |
| JPH0153434B2 (en) | ||
| US5015949A (en) | Steam turbine blade arrival time processor with automatic gain control | |
| US5144231A (en) | Eddy current detector for detecting an object with offset compensation | |
| JPS6390721A (en) | Ultrasonic phase contrast method for flow velocity measurement | |
| JPS58122247A (en) | Antiskid device | |
| JPH0467153B2 (en) | ||
| JPS60262061A (en) | Zero-point passage detection circuit for signal | |
| JPS5845520A (en) | Knocking detection device | |
| JPH0619291B2 (en) | Vibration monitoring equipment for rotating machinery | |
| JPS6264921A (en) | Apparatus for detecting knocking of engine | |
| JP2707757B2 (en) | Electromagnetic flow meter | |
| JPH06123639A (en) | Magnetic encoder | |
| JPS60143780A (en) | Rotary angular velocity operation circuit | |
| SU1276945A1 (en) | Method for checking condition of antifriction bearings and device for effecting same | |
| EP0780688B1 (en) | Velocity detector for sled motor | |
| JPH11281503A (en) | Phase difference detecting circuit | |
| JPS5722525A (en) | Rotary body balancing device | |
| JPS6088121U (en) | Rolling bearing abnormality detector | |
| JPS6232368A (en) | Detecting device for rotation of high speed rotary body | |
| SU1434299A1 (en) | Apparutus for measuring unbalance | |
| SU949333A1 (en) | Strain gauge type amplifier | |
| JPH0833162B2 (en) | Device for detecting displacement of rotating body in magnetic bearing device | |
| JPS6223142Y2 (en) |