JPS5942263B2 - Rotation speed deviation detection device - Google Patents
Rotation speed deviation detection deviceInfo
- Publication number
- JPS5942263B2 JPS5942263B2 JP11945077A JP11945077A JPS5942263B2 JP S5942263 B2 JPS5942263 B2 JP S5942263B2 JP 11945077 A JP11945077 A JP 11945077A JP 11945077 A JP11945077 A JP 11945077A JP S5942263 B2 JPS5942263 B2 JP S5942263B2
- Authority
- JP
- Japan
- Prior art keywords
- time
- pulse
- output
- rotation
- average
- 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
Landscapes
- Linear Or Angular Velocity Measurement And Their Indicating Devices (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
Description
【発明の詳細な説明】 本発明は回転体の回転数逸脱検出装置に関する。[Detailed description of the invention] The present invention relates to a rotational speed deviation detection device for a rotating body.
回転体の回転数の逸脱は前回測定した回転数と今回測定
した回転数との差から検出できる。そのため回転数を正
確に測定することが要求されている。一般には２通りあ
り、その一方は、回転体が単位角度回転するごとに生ず
る回転検出器の出力パルスを単位時間計数して、その計
数値と単位時間とから求める。他方は単位計数値になる
まで回転検出器の出力を計数し、この値なるまでに費し
た時間と単位計数値とから求める方法である。すなわち
前者は時間△をの間にｎ個のパルスが入つてきたとする
と止をその時間の平均回転数とし、カウンタをリセット
して次の時間迄のカウンタを繰り返すもので△を時間毎
に新しい回転数を求める。後者は、ｎ個のパルス入力で
カウンタが一杯になつたとき計算機に割込をかけて、前
回の割込時間を’と今回の割込時間をより４±を、の計
算式をといて平均回転数を求めるものでを−を’時間ご
とに新しい平均回転数を検出できる。ところでこの種の
装置で回転体の故障時等で回転数が落ちてきた事が判定
できるのは、前者の場合には△を時間後になり、また後
者の場合には次にカウンタが一杯になつた時間が最も早
いときであり、いずれの場合においてもある時間が経過
して情報処理した後、通常回転数または異常回転数かを
判断している。Deviations in the rotation speed of the rotating body can be detected from the difference between the rotation speed measured last time and the rotation speed measured this time. Therefore, it is required to accurately measure the rotation speed. Generally, there are two methods. One is to count the output pulses of the rotation detector generated every time the rotating body rotates by a unit angle for a unit time, and to obtain the result from the counted value and the unit time. The other method is to count the output of the rotation detector until a unit count value is reached, and to obtain the unit count value from the time taken to reach this value. In other words, in the former case, if n pulses come in during a time △, the stop is the average number of rotations for that time, the counter is reset, and the counter is repeated until the next time, and △ is set to a new number every time. Find the rotation speed. The latter interrupts the computer when the counter is full with n pulse inputs, and calculates the average by calculating the previous interrupt time by ' and the current interrupt time by 4±. In order to find the number of revolutions, it is possible to detect a new average number of revolutions every hour. By the way, with this type of device, it can be determined that the rotation speed has fallen due to a failure of the rotating body, etc. In the former case, it can be determined that the number of rotations has decreased after △ time has passed, and in the latter case, it can be determined that the number of rotations has decreased. In either case, after a certain amount of time has elapsed and the information has been processed, it is determined whether the rotation speed is normal or abnormal.
しかしながら特に高速回転している回転体に事故等が発
生した場合には、一刻も早くトリップ等の処理を行なう
必要があり、異常発生してから所望時間を経過ののちト
リップ等の処理を行なうとなれば事故の規模もそれだけ
大きくなる可能性が充分にある。However, especially when an accident occurs on a rotating body that is rotating at high speed, it is necessary to take measures such as tripping as soon as possible. If this happens, there is a good chance that the scale of the accident will be that much larger.
本発明の目的は、回転体の回転数の逸脱を一段と高速度
で判別できる回転数逸脱検出装置を提供することにある
。SUMMARY OF THE INVENTION An object of the present invention is to provide a rotational speed deviation detection device that can detect deviations in the rotational speed of a rotating body at an even higher speed.
この目的を達成するための概要は、平均回転数を求め、
この平均回転数から次のパルス到達時刻を予測して、こ
の予測時刻の前および後の所定時間帯に前記次のパルス
が到達したか否から回転数の逸脱を判断するようにして
、判断するまでの時、間を一層短縮を図る。The outline for achieving this purpose is to find the average rotation speed,
The next pulse arrival time is predicted from this average rotation speed, and a deviation in the rotation speed is determined based on whether the next pulse has arrived at a predetermined time period before and after this predicted time. We aim to further shorten the time it takes.
以下本願発明の一実施例を図面を参照しながら説明する
。An embodiment of the present invention will be described below with reference to the drawings.
回転体１０の単位角度回転するごとに１パルスが回転検
出器１１から出力される。One pulse is output from the rotation detector 11 every time the rotating body 10 rotates by a unit angle.
このパルスはデータ処理装置１２の入力および２進カウ
ンタ１３の入力側に接続する。このカウンタの出力はデ
ータ処理装置１２の入力側に供給する。このデータ処理
装置１２は、平均時間演算部と、次のパルス到着時間を
算出する予想時刻演算部と、その予想時刻演算部の予想
時刻内に次のパルスが到来したか否かを判別検出する判
別部とからなり、平均時間演算部は、回転検出器１１の
出力パルスを単位時間計数して、その計数値と単位時間
とから平均回転数を求めたり、単位計数値になるまで回
転検出器１１の出力を計数し、その値になるまでに費し
た時間と単位計数値とから平均回転数を求めたり、或は
移動平均法により平均回転数を求め、その平均回転数信
号を出力する。This pulse is connected to the input of the data processing device 12 and to the input of the binary counter 13. The output of this counter is fed to the input of the data processing device 12. This data processing device 12 includes an average time calculation unit, an expected time calculation unit that calculates the next pulse arrival time, and a determination and detection unit that determines whether or not the next pulse has arrived within the expected time of the expected time calculation unit. The average time calculating section counts the output pulses of the rotation detector 11 for a unit time, calculates the average rotation number from the counted value and the unit time, and calculates the average number of rotations from the counted value and the unit time. The output of 11 is counted, and the average rotational speed is determined from the time taken to reach that value and the unit count value, or the average rotational speed is determined by a moving average method, and the average rotational speed signal is output.
予想時刻演算部は回転検出器１１から今回に出力された
パルス信号を起点として計時し、平均演算回路の出力と
なる平均回転数信号から求められた単位回転角度に相等
する時間およびその前後、すなわち所定時間帯の幅をも
つて予測信号を出力する。判定部は、２進カウンタ１３
の出力の反転状況が予測信号の時間帯内で起きているか
否かを判別し、すなわちその時刻を含む前およびまたは
後の時間帯△ｔにおいてｔ／の時間間隔でＮ回にわたつ
て２進カウンタの出力状態を読み取り、その△ｔ時間帯
で２進カウンタの出力が反転していればパルス入力は正
常に入つてきているものと判断し回転体の回転数の逸脱
はなかつたとする。もしその時間内に反転がなければ異
常が発生して回転体の回転数の増減があつたものとし、
異常発生の可能性ありと判断し、この様な回転数逸脱の
状態がｍ回続いた時点で異常と判定して警報処理を行な
う。次にこのような回路構成の作動を説明する。回転検
出器１１から第２図Ａに示すごときパルスなりが出力さ
れる。この信号は２進カウンタ１３に与えられ、第２図
Ｂに示すごとき信号に変換される。データ処理装置１２
であつてはこれら回転検出器１１、２進カウンタ１３の
それぞれの出力を入力とし、平均回転数を算出し、パル
ス間隔の時間を算出する。パルス間隔の時間が明確とな
れば予定時刻Ｔｎ（第２図Ｃ）にパルスが生じることが
予測できる。その予定時刻Ｔｎの例えば前後１／２△ｔ
時間すなわち予定時刻Ｔｎを含む△ｔ時間内に２進カウ
ンタの出力をｔ１（第２図Ｃ）の時間間隔でデータ処理
装置１２が読込み、その結果△ｔ時間内に２進カウンタ
の出力状態が反転ＣＯ９５ｌ―電彎１９９ぅ賛０フ９）
すれば、予定通りカウンタに入カパルスが与えられたの
と同じであり、回転体１０が定常回転状態と言える。し
かしその△ｔ時間内に２進カウンタの出力状態が反転し
なけ減ば予定通りカウンタに入カパルスが与えられない
と同じであり、回転体の回転が異常な回転をしているも
のと予測できる。このように回転体の回転の異常を予定
時刻にパルスが存在したか否かによつて直ちに検出して
検出時間の短縮を図る。なお本願において平均回転数よ
りパルス間隔の平均時間を算出して、次のパルスが発生
する時刻を算出するようにしたが、プログラムによつて
平均回転数及び次回パルス入力到達予想時刻Ｔｎが求め
るようにしてもよい。The expected time calculation section measures time using the pulse signal outputted this time from the rotation detector 11 as a starting point, and calculates the time equivalent to the unit rotation angle obtained from the average rotation speed signal output from the average calculation circuit, and the time before and after that, that is. A predicted signal is output with a width of a predetermined time period. The determination unit is a binary counter 13
It is determined whether the reversal situation of the output of is occurring within the time period of the predicted signal, that is, the binary value is calculated N times at time intervals of t/ in the time period △t before and/or after the time including that time. The output state of the counter is read, and if the output of the binary counter is inverted during the Δt time period, it is determined that the pulse input is coming in normally, and there is no deviation in the rotational speed of the rotating body. If there is no reversal within that time, it is assumed that an abnormality has occurred and the rotational speed of the rotating body has increased or decreased.
It is determined that there is a possibility of an abnormality occurring, and when such a state of rotational speed deviation continues m times, it is determined that there is an abnormality and an alarm process is performed. Next, the operation of such a circuit configuration will be explained. The rotation detector 11 outputs pulses as shown in FIG. 2A. This signal is applied to a binary counter 13 and converted into a signal as shown in FIG. 2B. Data processing device 12
In this case, the outputs of the rotation detector 11 and the binary counter 13 are input, the average number of rotations is calculated, and the pulse interval time is calculated. If the pulse interval time is clear, it can be predicted that a pulse will occur at the scheduled time Tn (FIG. 2C). For example, 1/2 △t before and after the scheduled time Tn
The data processing device 12 reads the output of the binary counter at the time interval t1 (C in FIG. 2) within the time △t including the scheduled time Tn, and as a result, the output state of the binary counter changes within the time △t. Inverted CO95l-Denkei 199ぅsan0fu9)
Then, it is the same as if the input pulse was given to the counter as planned, and it can be said that the rotating body 10 is in a steady rotation state. However, if the output state of the binary counter does not reverse or decrease within that △t time, it is the same as if the input pulse was not given to the counter as planned, and it can be predicted that the rotation of the rotating body is abnormal. . In this way, an abnormality in the rotation of the rotating body is immediately detected depending on whether or not a pulse is present at the scheduled time, thereby shortening the detection time. In this application, the average time of pulse intervals is calculated from the average rotational speed to calculate the time when the next pulse is generated. You may also do so.
この場合チエツクのバラメータとしてチエツク時間△ｔ
、間隔ｔ′とその回数は予め設定された運転モード、機
器毎の許容誤差及び前回の信号反転時間等を考慮して演
算処理する事が可能であり、回転数逸脱の検出の精度、
感度を調整することができる。また人間の操作によつて
回転の立上り及び降速の情報が与えられれば、予定時刻
Ｔｎの算出及び△ｔまたはｔ′をプログラムにより変更
する事が可能であり、定常回転状態以外にもある程度の
対応ができる。また本願にあつては平均回転数から算出
されたパルス間隔により求めた次のパルスの生ずる予定
時刻に次のパルスが生じたか否かを判別するために２進
力カウンタなるものを用いたがこれに限定されるもので
はなく、次のパルスの生ずると思われる予定時刻の前お
よびまたは後の所定時間帯だけゲートを開いて回転検出
器の出力側をデータ処理装置の入力側に接続するように
しても同様な効果を奏することはもちろんのことである
。以上本願発明は、平均回転数からパルス間隔の時間を
求めて、次のパルスの生ずる時刻を予定し、その予定時
刻において次のパルスの有無から回転体の回転数の逸脱
状態か否かを直ちに判別できるように構成したために、
従来装置のごとき今回の測定終了時に今回の平均回転数
から前回の平均回転数を差し引き、この差の値の大小よ
り判別するようにしていたが、この工程がなくなつたた
め回転体の回転異常を従来のものに比ベー段と速く検出
でき、トリップ等の処理がそれだけ早く処理でき、事故
の規模を最小限にくい止めるような効果を奏し得る。In this case, the check parameter is check time △t
, the interval t' and the number of times can be calculated by taking into account the preset operating mode, the tolerance of each device, the previous signal reversal time, etc., and the accuracy of detecting rotation speed deviation,
Sensitivity can be adjusted. In addition, if information on the rise and fall of rotation is given by human operation, it is possible to calculate the scheduled time Tn and change Δt or t' by a program, and it is possible to change the rotation speed to a certain extent in addition to the steady rotation state. I can handle it. In addition, in the present application, a binary force counter is used to determine whether or not the next pulse occurs at the scheduled time when the next pulse occurs, which is determined from the pulse interval calculated from the average rotational speed. However, the output side of the rotation detector is connected to the input side of the data processing device by opening the gate only during a predetermined period of time before and/or after the scheduled time when the next pulse is expected to occur. Of course, the same effect can be achieved. As described above, the present invention calculates the pulse interval time from the average rotational speed, schedules the time when the next pulse will occur, and immediately determines whether or not the rotational speed of the rotating body is in a deviation state from the presence or absence of the next pulse at the scheduled time. Because it is configured so that it can be distinguished,
With conventional equipment, at the end of the current measurement, the previous average rotation speed was subtracted from the current average rotation speed, and the difference was determined based on the magnitude of the difference, but since this step has been eliminated, it is now possible to detect abnormal rotation of the rotating body. It can detect things much faster than conventional methods, and trips and the like can be dealt with faster, which can have the effect of minimizing the scale of accidents.
第１図は本願発明の一実施例の電気回路の構成をプロツ
ク的に示す図、第２図は、本願発明の一実施例の作動を
説明す６ための波形図である。
１０・・・・・・回転体、１１・・・・・・回転検出器
、１２・・・・・・データ処理装置、１３・・・・・・
２進カウンタ。FIG. 1 is a diagram schematically showing the configuration of an electric circuit according to an embodiment of the present invention, and FIG. 2 is a waveform diagram for explaining the operation of an embodiment of the present invention. 10... Rotating body, 11... Rotation detector, 12... Data processing device, 13...
binary counter.
Claims (1)
る回転検出器と、前記回転検出器の出力パルスを入力し
、このパルスの計数値と計数時間とから回転体が単位角
度を回転するに要する平均時間を算出する回路と、前記
回転検出器の出力パルスおよび平均時間を入力し、この
回転検出器の出力パルス発生時刻と平均時間とから次の
パルスが出力される予想時刻を算出する回路と、前記回
転検出器の出力パルスを入力し、パルスが入力される毎
に出力を反転する２進カウンタと、予想時刻を含む前後
の時間帯内で前記２進カウンタの出力が反転しないとき
回転体の回転異常信号を出力する回路とを備えてなる回
転数逸脱検出装置。1. Input a rotation detector that outputs a pulse every time the rotating body rotates a unit angle, input the output pulse of the rotation detector, and calculate the number of times the rotating body rotates a unit angle from the count value and counting time of this pulse. A circuit that calculates the required average time, and a circuit that inputs the output pulse of the rotation detector and the average time, and calculates the expected time when the next pulse will be output from the output pulse generation time of the rotation detector and the average time. and a binary counter that inputs the output pulse of the rotation detector and inverts the output every time the pulse is input, and a binary counter that rotates when the output of the binary counter does not invert within a time period before and after the expected time. A rotation speed deviation detection device comprising a circuit that outputs a body rotation abnormality signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11945077A JPS5942263B2 (en) | 1977-10-06 | 1977-10-06 | Rotation speed deviation detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11945077A JPS5942263B2 (en) | 1977-10-06 | 1977-10-06 | Rotation speed deviation detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5453575A JPS5453575A (en) | 1979-04-26 |
| JPS5942263B2 true JPS5942263B2 (en) | 1984-10-13 |
Family
ID=14761685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11945077A Expired JPS5942263B2 (en) | 1977-10-06 | 1977-10-06 | Rotation speed deviation detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5942263B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01168772U (en) * | 1988-05-20 | 1989-11-28 |
-
1977
- 1977-10-06 JP JP11945077A patent/JPS5942263B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01168772U (en) * | 1988-05-20 | 1989-11-28 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5453575A (en) | 1979-04-26 |
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