JPH0414116A - Pressure pulsation controller for fluid pipeline system - Google Patents
Pressure pulsation controller for fluid pipeline systemInfo
- Publication number
- JPH0414116A JPH0414116A JP11785190A JP11785190A JPH0414116A JP H0414116 A JPH0414116 A JP H0414116A JP 11785190 A JP11785190 A JP 11785190A JP 11785190 A JP11785190 A JP 11785190A JP H0414116 A JPH0414116 A JP H0414116A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- pulsation
- flow velocity
- fluid
- pressure sensor
- 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.)
- Granted
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 48
- 230000010349 pulsation Effects 0.000 title claims abstract description 29
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 abstract description 4
- 230000003321 amplification Effects 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
- 239000002994 raw material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
Landscapes
- Control Of Fluid Pressure (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、流体管路内を流れる流体の脈動を吸収するよ
うにした流体管路系の圧力脈動制御装置に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pressure pulsation control device for a fluid pipeline system that absorbs pulsations in fluid flowing within the fluid pipeline.
［従来の技術］
抄紙機原料輸送配管等の液体輸送配管の脈動吸収、配管
ダクトの消音等を行なう流体管路系の圧力脈動制御装置
においては、従来流体管路系に２個の圧力センサを設け
て一方の圧力センサに遅延回路を挿入し、２個の圧力セ
ンサの出力を演算することによって脈動を検出し、流体
管路の管壁に設けた可動壁をアクチュエータによって流
体管路の径方向に移動させて脈動を吸収していた。[Prior Art] In a pressure pulsation control device for a fluid piping system that absorbs pulsations in liquid transport piping such as paper machine raw material transport piping, silences piping ducts, etc., conventionally two pressure sensors are installed in the fluid piping system. A delay circuit is inserted into one of the pressure sensors, and pulsation is detected by calculating the outputs of the two pressure sensors. It was moved to absorb the pulsation.
［発明が解決しようとする課題］
従来の遅延回路を挿入した装置では、基本的に進行波を
検出していることにはならず、従って可動壁からの逆転
は波の影響を完全に消すことはできなかった。[Problem to be solved by the invention] A conventional device with a delay circuit inserted basically does not detect traveling waves, and therefore, reversing from a movable wall completely eliminates the influence of waves. I couldn't.
本発明はこのような従来の欠点を除去し、正確な進行波
成分を用いてアクチュエータを駆動することにより、脈
動成分を減少させることができるようにした流体管路系
の圧力脈動制御装置を提供することを目的とするもので
ある。The present invention eliminates such conventional drawbacks and provides a pressure pulsation control device for a fluid pipeline system that can reduce pulsation components by driving an actuator using accurate traveling wave components. The purpose is to
［課題を解決するための手段］
本発明の流体管路系の圧力脈動制御装置は、流体管路の
管壁に設けた可動壁と、該可動壁に連結され且つ該可動
壁を前記流体管路の径方向へ移動させるアクチュエータ
と、前記流体管路の可動壁上流側に設けられ前記流体管
路内の流速変動を検出する圧力センサおよび前記流体管
路内の圧力変動を検出する圧力センサと、前記可動壁近
傍に設けられ前記流体管路内の圧力変動を検出する圧力
センサと、前記流速変動を検出する圧力センサの出力か
ら流速脈動を演算する流速演算器と、該流速演算器の出
力と圧力変動を検出する圧力センサの出力とから進行波
変動成分を演算する進行波演算器と、該進行波演算器の
出力を受け前記可動壁近傍の圧力センサの圧力信号によ
り補償して前記アクチュエータの駆動信号を出力するア
クチュエータ動特性、管路動特性補償器とを備えたこと
を特徴とするものである。[Means for Solving the Problem] A pressure pulsation control device for a fluid pipe system according to the present invention includes a movable wall provided on a pipe wall of a fluid pipe, and a movable wall connected to the movable wall and connected to the fluid pipe. an actuator that moves in the radial direction of the fluid pipe; a pressure sensor that is provided on the upstream side of a movable wall of the fluid pipe that detects flow velocity fluctuations in the fluid pipe; and a pressure sensor that detects pressure fluctuations in the fluid pipe. , a pressure sensor provided near the movable wall to detect pressure fluctuations in the fluid pipeline, a flow velocity calculator that calculates flow velocity pulsation from the output of the pressure sensor that detects the flow velocity fluctuations, and an output of the flow velocity calculator. and an output of a pressure sensor that detects pressure fluctuations, and a traveling wave calculator that calculates a traveling wave fluctuation component from the output of a pressure sensor that detects pressure fluctuations; The present invention is characterized in that it includes an actuator dynamic characteristic compensator and a pipe dynamic characteristic compensator that outputs a drive signal.
［作 用〕
可動壁の上流側で流体管路内の圧力変動を検出すると同
時に流量変動を検出し、圧力変動と流量変動から演算し
た正確な進行波成分を用いてアクチュエータを制御し、
脈動成分を減少させることになる。[Function] Detects pressure fluctuations in the fluid pipe on the upstream side of the movable wall and detects flow rate fluctuations at the same time, controls the actuator using accurate traveling wave components calculated from pressure fluctuations and flow rate fluctuations,
This will reduce the pulsating component.
［実 施 例コ 以下、本発明の実施例を図面を参照して説明する。[Implementation example] Embodiments of the present invention will be described below with reference to the drawings.
第１図中、■は抄紙機原料配管等の流体管路で、左が上
流２、右が下流３であって、抄紙原料等の流体は、流体
管路１内を左から右へ流れるようになっている。流体管
路１の一部には流体管路１の径方向外方に突設したシリ
ンダ４かあって、シリンダ４内にはピストン状の可動壁
５が嵌合されており、可動壁５は外部のアクチュエータ
６によって流体管路ｌの径方向に移動されるようになっ
ている。In Fig. 1, ■ indicates a fluid pipe such as a paper machine raw material pipe, where the left is the upstream 2 and the right is the downstream 3, so that the fluid such as the paper machine raw material flows from left to right in the fluid pipe 1. It has become. A part of the fluid conduit 1 has a cylinder 4 projecting outward in the radial direction of the fluid conduit 1, and a piston-shaped movable wall 5 is fitted into the cylinder 4. It is adapted to be moved in the radial direction of the fluid conduit l by an external actuator 6.
流体管路ｌの可動壁５の上流２側には、流体管路ｌ内の
流速変動を検出する２個の圧力センサ７，８が距離Ａｘ
をおいて取付けられている。On the upstream 2 side of the movable wall 5 of the fluid pipe l, two pressure sensors 7 and 8 for detecting flow velocity fluctuations in the fluid pipe l are mounted at a distance Ax.
It is installed with the
また圧力センサ７，８から距離ＩＪ ｘ ／ ２をおい
た中間には圧力センサ９が、可動壁５の近傍には圧力セ
ンサｌＯが、それぞれ取付けられている。Further, a pressure sensor 9 is installed at a distance IJ x /2 from the pressure sensors 7 and 8, and a pressure sensor 1O is installed near the movable wall 5, respectively.
圧力センサ７，８．９．１０の出力は変動成分検出用バ
イパスフィルタ１１に入力されて流体管路ｌ内の圧力の
変動成分が検出され、変動成分検出用バイパスフィルタ
１１の出力はノイズ除去用ローパスフィルタ１２に入力
されてノイズが除去されるようになっている。そして圧
力センサ７の出力Ｐ１と圧力センサ８の出力Ｐ２とは、
流速演算器１３に人力されるようになっている。The outputs of the pressure sensors 7, 8, 9, and 10 are input to the fluctuation component detection bypass filter 11 to detect the fluctuation component of the pressure in the fluid pipe l, and the output of the fluctuation component detection bypass filter 11 is used for noise removal. The signal is input to a low-pass filter 12 to remove noise. The output P1 of the pressure sensor 7 and the output P2 of the pressure sensor 8 are
The flow velocity calculator 13 is operated manually.
Ｕ ：圧力センサ７，８の中間位置における断面平均流
速の脈動（以下、「流速脈動」と記す。）
ｔ：時間
Ａｔ：サンプリング周期（−１／ｆｓ）ｆｓ ：サンプ
リング周波数
Ｒｆ ：管路流れの抵抗係数（−８ν／ｒ’０）ν ：
流体の動粘度
ｒｏ ：管路の内半径
とするとき、流速演算器１３においては、時刻ｔ＋Ａｔ
における流速変動を次の式から演算する。U: Pulsation of cross-sectional average flow velocity at the intermediate position between pressure sensors 7 and 8 (hereinafter referred to as "flow velocity pulsation") t: Time At: Sampling period (-1/fs) fs: Sampling frequency Rf: Pipe flow rate Resistance coefficient (-8ν/r'0)ν:
When fluid kinematic viscosity ro is the inner radius of the pipe, in the flow velocity calculator 13, time t+At
The flow velocity fluctuation at is calculated from the following formula.
ｕ （ｔ＋Ａｔ）−
ｆＰｌ（ｔ） −Ｐ２ （ｔ） ＋Ｐ１（ｔ＋、６ｔ）
−Ｐ２ （ｔ＋ｆｆ１ｔ））このように流速演算器１３
においては、圧力センサ７の出力Ｐ１と圧力センサ８の
出力Ｐ２とから、圧力センサ７，８の中間位置における
流速脈動Ｕを演算する。u (t+At) − fPl(t) −P2 (t) +P1(t+, 6t)
-P2 (t+ff1t)) In this way, the flow velocity calculator 13
, the flow velocity pulsation U at the intermediate position between the pressure sensors 7 and 8 is calculated from the output P1 of the pressure sensor 7 and the output P2 of the pressure sensor 8.
流速演算器１３て演算された流速脈動Ｕは進行波演算器
１４に入力される。進行波演算器１４には、圧力センサ
９の検出した圧力脈動Ｐ３も入力され、
Ｆ＋（ｔ）：圧力センサ９の位置における流速脈動の進
行波
Ｃ：流体管路１内流体中の音速
とするとき、進行波演算器１４においては、次の式から
流速脈動の進行波Ｆ＋（ｔ）を演算する。The flow velocity pulsation U calculated by the flow velocity calculator 13 is input to the traveling wave calculator 14. The pressure pulsation P3 detected by the pressure sensor 9 is also input to the traveling wave calculator 14, and F+(t): Traveling wave of flow velocity pulsation at the position of the pressure sensor 9 C: Sound velocity in the fluid in the fluid pipe 1. At this time, the traveling wave calculator 14 calculates the traveling wave F+(t) of the flow velocity pulsation from the following equation.
進行波演算器１４て演算された進行波Ｆ＋（ｔ）はアク
チュエータ動特性、管路動特性補償器１５に人力され、
次に説明する補償か行なわれた後、増幅器１６で増幅さ
れてアクチュエータ６に入力され、アクチュエータ６に
よって可動壁５を流体管路１の径方向へ移動させる。シ
リンダ４と流体管路１の内径が等しい場合、可動壁５の
移動は、流体管路１を伝わって来た流速脈動Ｆ＋ （
を−τ）に対し大きさか２倍で位相が１８０６異なる一
２ｆ＋ （ｔ−τ）の進行波になっていて、この進行
波は第２図に示すように流体管路１内の流体に加えられ
て進行波
Ｆ、（を−τ）を吸収し、可動壁５より下流の位置での
流速脈動の進行波を零にする。シリンダ４と流体管路ｌ
の内径か異なる場合は、２Ａｐ／Ａｃ Ｆ＋ （ｔ−
ｒ）の進行波とすればよい（Ａｐ ：流体管路１の断面
積、 ＡＣニジリンダ断面積）。τはＰ３からＰ４へ進
行波の伝達時間を示し、アクチュエータ動特性、管路動
特性補償器１５によって決定する。The traveling wave F+(t) calculated by the traveling wave calculator 14 is manually inputted to the actuator dynamic characteristic compensator 15 and the pipe dynamic characteristic compensator 15.
After the compensation described below is performed, the signal is amplified by the amplifier 16 and input to the actuator 6, and the actuator 6 moves the movable wall 5 in the radial direction of the fluid conduit 1. When the inner diameters of the cylinder 4 and the fluid pipe 1 are equal, the movement of the movable wall 5 is caused by the flow velocity pulsation F+ (
It is a traveling wave of -2f+ (t-τ) which is twice the magnitude or 1806 times different in phase from -τ), and this traveling wave is added to the fluid in the fluid pipe 1 as shown in Fig. 2. The movable wall 5 absorbs the traveling wave F, (-τ), and makes the traveling wave of flow velocity pulsation at a position downstream of the movable wall 5 zero. Cylinder 4 and fluid pipe l
2Ap/Ac F+ (t-
r) (Ap: cross-sectional area of fluid pipe line 1, cross-sectional area of AC cylinder). τ indicates the propagation time of the traveling wave from P3 to P4, and is determined by the actuator dynamic characteristic and pipe dynamic characteristic compensator 15.
可動壁５の近傍に設けである圧力センサ１０は可動壁５
による一２Ｆ＋ （を−τ）の進行波が加えられた流
体管路１内の圧力変動Ｐ４を検出し、変動成分検出用バ
イパスフィルタ１１、ライス除去用ローパスフィルタ１
２を通してアクチュエータ動特性、管路動特性補償器１
５に入力し、可動壁５近傍での圧力変動が零とならない
場合に、進行波演算器１４からの入力を補償して下流３
側の脈動が零となるように可動壁５を制御する。A pressure sensor 10 provided near the movable wall 5 is connected to the movable wall 5.
The pressure fluctuation P4 in the fluid pipe 1 to which the traveling wave of -2F+ (-τ) is applied is detected, and the fluctuation component detection bypass filter 11 and the Rice removal low-pass filter 1 are applied.
Actuator dynamic characteristics through 2, pipe dynamic characteristics compensator 1
5, and when the pressure fluctuation near the movable wall 5 does not become zero, the input from the traveling wave calculator 14 is compensated and the downstream
The movable wall 5 is controlled so that the side pulsation becomes zero.
［発明の効果コ
本発明は、可動壁より下流側の流体管路内の流体の圧力
、流量変動を除去することかできる。[Effects of the Invention] The present invention can eliminate fluid pressure and flow rate fluctuations in the fluid pipeline downstream of the movable wall.
また可動壁を作動させることによって、上流側に伝ばす
る適任は波を上流側の圧力センサか検出し、制御ループ
として不安定となるハウリングが防止できる効果かある
。In addition, by operating the movable wall, the wave propagating upstream is detected by the upstream pressure sensor, which has the effect of preventing howling, which would make the control loop unstable.
第１図は本発明の一実施例の系統図、第２図は動作説明
図である。
図中、１は流体管路、２は上流、３は下流、５は可動壁
、６はアクチュエータ、７，８，９．１０は圧力センサ
、１３は流速演算器、１４は進行波演算器、１５はアク
チュエータ動特性、管路動特性補償器を示す。FIG. 1 is a system diagram of an embodiment of the present invention, and FIG. 2 is an operational diagram. In the figure, 1 is a fluid pipe, 2 is an upstream, 3 is a downstream, 5 is a movable wall, 6 is an actuator, 7, 8, 9.10 is a pressure sensor, 13 is a flow velocity calculator, 14 is a traveling wave calculator, 15 indicates an actuator dynamic characteristic compensator and a pipe dynamic characteristic compensator.
Claims (1)
され且つ該可動壁を前記流体管路の径方向へ移動させる
アクチュエータと、前記流体管路の可動壁上流側に設け
られ前記流体管路内の流速変動を検出する圧力センサお
よび前記流体管路内の圧力変動を検出する圧力センサと
、前記可動壁近傍に設けられ前記流体管路内の圧力変動
を検出する圧力センサと、前記流速変動を検出する圧力
センサの出力から流速脈動を演算する流速演算器と、該
流速演算器の出力と圧力変動を検出する圧力センサの出
力とから進行波変動成分を演算する進行波演算器と、該
進行波演算器の出力を受け前記可動壁近傍の圧力センサ
の圧力信号により補償して前記アクチュエータの駆動信
号を出力するアクチュエータ動特性、管路動特性補償器
とを備えたことを特徴とする流体管路系の圧力脈動制御
装置。1) A movable wall provided on a pipe wall of a fluid pipe, an actuator connected to the movable wall and moving the movable wall in the radial direction of the fluid pipe, and an actuator provided on the upstream side of the movable wall of the fluid pipe. a pressure sensor that detects a flow velocity variation in the fluid pipeline, a pressure sensor that detects a pressure variation in the fluid pipeline, and a pressure sensor that is provided near the movable wall and detects a pressure variation in the fluid pipeline. a flow velocity calculator that calculates flow velocity pulsation from the output of the pressure sensor that detects the flow velocity fluctuation; and a traveling wave that computes a traveling wave fluctuation component from the output of the flow velocity calculator and the output of the pressure sensor that detects the pressure fluctuation. comprising a computing unit, and an actuator dynamic characteristic and pipe dynamic characteristic compensator that receives the output of the traveling wave computing unit, compensates it with a pressure signal from a pressure sensor near the movable wall, and outputs a drive signal for the actuator. A pressure pulsation control device for a fluid piping system characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2117851A JP2804600B2 (en) | 1990-05-08 | 1990-05-08 | Pressure pulsation control device for fluid line system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2117851A JP2804600B2 (en) | 1990-05-08 | 1990-05-08 | Pressure pulsation control device for fluid line system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0414116A true JPH0414116A (en) | 1992-01-20 |
| JP2804600B2 JP2804600B2 (en) | 1998-09-30 |
Family
ID=14721857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2117851A Expired - Lifetime JP2804600B2 (en) | 1990-05-08 | 1990-05-08 | Pressure pulsation control device for fluid line system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2804600B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011520185A (en) * | 2008-04-22 | 2011-07-14 | ローズマウント インコーポレイテッド | Industrial process equipment using piezoelectric transducers |
| DE102017126690A1 (en) | 2016-11-16 | 2018-05-17 | Ckd Corporation | air filter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62279415A (en) * | 1986-05-28 | 1987-12-04 | Ishikawajima Harima Heavy Ind Co Ltd | Controlling method for pulsating flow in tube |
| JPS6338069U (en) * | 1986-08-27 | 1988-03-11 |
-
1990
- 1990-05-08 JP JP2117851A patent/JP2804600B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62279415A (en) * | 1986-05-28 | 1987-12-04 | Ishikawajima Harima Heavy Ind Co Ltd | Controlling method for pulsating flow in tube |
| JPS6338069U (en) * | 1986-08-27 | 1988-03-11 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011520185A (en) * | 2008-04-22 | 2011-07-14 | ローズマウント インコーポレイテッド | Industrial process equipment using piezoelectric transducers |
| US9921120B2 (en) | 2008-04-22 | 2018-03-20 | Rosemount Inc. | Industrial process device utilizing piezoelectric transducer |
| DE102017126690A1 (en) | 2016-11-16 | 2018-05-17 | Ckd Corporation | air filter |
| DE102017126690B4 (en) | 2016-11-16 | 2023-07-20 | Ckd Corporation | air filter |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2804600B2 (en) | 1998-09-30 |
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