JPH0396675A - Operation pump number control device of fixed speed pumps - Google Patents
Operation pump number control device of fixed speed pumpsInfo
- Publication number
- JPH0396675A JPH0396675A JP22940789A JP22940789A JPH0396675A JP H0396675 A JPH0396675 A JP H0396675A JP 22940789 A JP22940789 A JP 22940789A JP 22940789 A JP22940789 A JP 22940789A JP H0396675 A JPH0396675 A JP H0396675A
- Authority
- JP
- Japan
- Prior art keywords
- water level
- water
- level
- pump well
- pump
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 132
- 235000020681 well water Nutrition 0.000 abstract description 24
- 239000002349 well water Substances 0.000 abstract description 24
- 239000004576 sand Substances 0.000 abstract description 3
- 239000010865 sewage Substances 0.000 description 15
- 238000010586 diagram Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
Landscapes
- Control Of Non-Positive-Displacement Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は、ポンプ井に蓄積された雨水を引抜く固定速ポ
ンプの運転台数を１１御する固定速ポンプの運転台数＃
１御装置に関する。[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention is directed to controlling the number of operating fixed speed pumps #1 that control the number of operating fixed speed pumps that extract rainwater accumulated in pump wells.
1 regarding the control device.
（従来の技術）
一般に、下水処理場では管渠を通じて流れ込む下水をポ
ンプ井に蓄積し、蓄積された下水を複数台の固定速ポン
プで引抜いて、下流側の装置へ送り出している。このよ
うな下水処ｌＩ！設備では、沈砂池の沈砂効率を向上さ
せるためポンプ井の水位を所定範囲内に保持しなければ
ならない。このため、固定速ポンプの運転台数をポンプ
Ｈの水位に応じて制御する必要があり、従来より、第４
図に示すようなものが知られている。(Prior Art) Generally, in a sewage treatment plant, sewage flowing through pipes is accumulated in a pump well, and the accumulated sewage is drawn out using a plurality of fixed speed pumps and sent to downstream equipment. Sewage treatment like this! In the equipment, the water level of the pump well must be maintained within a predetermined range in order to improve the settling efficiency of the settling basin. For this reason, it is necessary to control the number of fixed-speed pumps in operation according to the water level of pump H.
The one shown in the figure is known.
同図において、管渠１を通じて流れ込んだ下水は、沈砂
池２において土砂が排除された後、スクリーン３を介し
てポンプ井４に導かれ蓄積される。In the figure, sewage flowing through a pipe 1 has sediment removed in a settling basin 2, and then is led to a pump well 4 via a screen 3 and accumulated.
蓄積された下水は、複数台の固定速ポンプ５〜５（図で
は３台）によって引抜かれ、下流設備６に送り出される
。The accumulated sewage is extracted by a plurality of fixed speed pumps 5 to 5 (three in the figure) and sent to downstream equipment 6.
一方、ポンプ井４の水位を所定のレベルに保持するため
に、ポンプ井４には水位計７が取付けられており、この
検出信号しは制御装置８のポンプ運転台数判定部９に供
給されている。On the other hand, in order to maintain the water level in the pump well 4 at a predetermined level, a water level gauge 7 is attached to the pump well 4, and this detection signal is supplied to the pump operation number determination unit 9 of the control device 8. There is.
ポンプ運転台数判定部９には、第５図に示すように、ポ
ンプ井水位に対して、Ｎ台目ポンプ運転水位Ｎｏｎ（Ｎ
＝１〜３）、及びＮ台目ポンプ停止水位ＮＯｆｆが予め
設定されており、これに基づいて水位計７で測定された
現在のポンプ井水位Ｌに対して必要なポンプ運転台数Ｍ
を決定している。As shown in FIG.
= 1 to 3), and the N-th pump stop water level Noff are set in advance, and based on this, the number M of pumps in operation is required for the current pump well water level L measured by the water level gauge 7.
has been decided.
そして、ポンプ台数制御部１０では、所定の優先順位に
従って各固定速ポンプ５〜５に起動・停止指令を出力し
、決定した運転台数Ｍとなるように制御している。Then, the pump number control unit 10 outputs start/stop commands to each of the fixed speed pumps 5 to 5 according to a predetermined priority order, and controls the fixed speed pumps so that the determined number M of pumps is in operation.
（発明が解決しようとする課題〉
しかしながら、このような従来のポンプ運転台数制御装
置では、各固定速ポンプ５〜５の運転・停止が、運転水
位Ｎｏｎ・停止水位Ｎ ｏｆｆによって決定するため、
ポンプ井４に流れ込む下水流量が急激に変化した場合に
は、ポンプ井４の水位を所定範囲内に保持することが困
難となる。(Problems to be Solved by the Invention) However, in such a conventional pump operation number control device, the operation/stop of each fixed speed pump 5 to 5 is determined by the operating water level No and the stop water level N off.
When the flow rate of sewage flowing into the pump well 4 changes rapidly, it becomes difficult to maintain the water level of the pump well 4 within a predetermined range.
その結果、沈砂池における沈砂効率が低下するばかりで
なく水位が上昇してオーバーフローを引起こしたり、水
位が下降して無水状態となってしまうという不具合が発
生していた。As a result, not only the sand settling efficiency in the sand settling basin decreases, but also problems occur in that the water level rises, causing an overflow, and the water level falls, resulting in an anhydrous state.
また、このようなポンプ井４の水位制御には、可変速ポ
ンプを設置し、ポンプの回転速度を調節しながらポンプ
井４の水位を所定の範囲内に保持するものが提案されて
いるが、可変速ポンプを用いると、設備のコストが増大
するばかりでなく、制御系統が複雑化してしまうので比
較的小規模の下水処理場では実用的ではないという欠点
がある。In addition, it has been proposed to control the water level of the pump well 4 by installing a variable speed pump and maintaining the water level of the pump well 4 within a predetermined range while adjusting the rotational speed of the pump. The disadvantage of using a variable speed pump is that it not only increases the cost of the equipment, but also complicates the control system, making it impractical for relatively small-scale sewage treatment plants.
この発明は、このような従来の課題を解決するためにな
されたもので、その目的とするところは、ポンプ井に流
入する下水流量が急変した場合においても、ポンプ井の
水位を所定の範囲内に保持することのできる固定速ポン
プの運転台数制御装置を提供することにある。This invention was made to solve these conventional problems, and its purpose is to keep the water level in the pump well within a predetermined range even when the flow rate of sewage flowing into the pump well changes suddenly. An object of the present invention is to provide a device for controlling the number of fixed speed pumps in operation, which can maintain the same speed.
［発明の構Ｉｉ］
（課題を解決するための手段〉
上記目的を達成するため、本発明は、複数台の固定速ポ
ンプの運転台数を制御してポンプ井の水位を調節する固
定速ポンプの運転台数！１１ｔｌ装置において、前記ポ
ンプ井の水位を検出する水位計と、前記ポンプ井の現在
の水位と過去の水位との差分から水位変化率を演算する
水位変化率演算手段と、前記水位変化率に基づいて将来
のポンプ井の水位を予測する水位予測手段と、ポンプ井
の現在水位、将来の水位、及び水位変化率に基づいて前
記固定速ポンプの運転台数を決定する運転台数決定手段
と、を有することが特徴である。[Structure of the Invention Ii] (Means for Solving the Problem) In order to achieve the above object, the present invention provides a fixed speed pump that adjusts the water level of a pump well by controlling the number of operating fixed speed pumps. Number of operating units! In the 11 tl device, a water level gauge that detects the water level of the pump well, a water level change rate calculation means that calculates a water level change rate from the difference between the current water level and the past water level of the pump well, and a water level change rate calculation means that water level prediction means for predicting the future water level of the pump well based on the rate; and operation number determining means for determining the number of operating fixed speed pumps based on the current water level of the pump well, the future water level, and the water level change rate. It is characterized by having the following.
（作用〉
上述の如く構成すれば、水位計で検出された現在の水位
と過去の水位との差分から水位変化率が求められる。そ
して、この水位変化率に所定の時間を乗じ、これに現在
の水位を加えて所定時間後の水位予測値が求められる。(Operation) With the above configuration, the water level change rate can be calculated from the difference between the current water level detected by the water level meter and the past water level.Then, this water level change rate is multiplied by a predetermined time, and the current A predicted value of the water level after a predetermined period of time is obtained by adding the water level of .
その後、運転台数決定手段では、ポンプ井の現在水位、
将来の水位予測値、及び水位変化率に基づいて、固定速
ポンプの運転台数を決定する。そして、この運転台数と
なるように各固定速ポンプの運転・停止が行なわれる。After that, in the operation number determining means, the current water level of the pump well,
The number of fixed-speed pumps to be operated is determined based on the predicted future water level and the rate of change in water level. Then, each fixed speed pump is operated and stopped so that this number of pumps is in operation.
従って、ポンプ井水位を先行予測して固定速ポンプの運
転・停止を切換えることができる。Therefore, it is possible to predict the pump well water level in advance and switch between operating and stopping the fixed speed pump.
（実施例） 第１図は本発明の一実施例を示す構成図である。(Example) FIG. 1 is a block diagram showing an embodiment of the present invention.
図示のように、管渠１を通じて流入した下水は沈砂池２
において土砂が除去され、スクリーン３を介してポンプ
井４に蓄積される。そして、蓄積された下水は複数台（
図では３台）の固定速ポンプ５〜５によって引抜かれ、
下流設備６へ送り出される。As shown in the diagram, sewage that has flowed in through pipe 1 is sent to settling basin 2.
Sediment is removed and accumulated in the pump well 4 via the screen 3. The accumulated sewage is collected from multiple units (
It is extracted by fixed speed pumps 5 to 5 (three in the figure),
It is sent to downstream equipment 6.
また、ボンプ井４には水位計７が取付けられており、こ
の検出信号は各固定速ポンプ５〜５の運転・停止を制御
する制御装置８に供給されている。Further, a water level gauge 7 is attached to the pump well 4, and a detection signal from the water level gauge 7 is supplied to a control device 8 that controls operation/stop of each fixed speed pump 5 to 5.
制御装置８は、ポンプ井水位の目標値１−ｒと制御幅α
に基づいて水位の制御帯を求める水位制御帯決定部１１
と、ポンプ井４の現在の水位と過去の水位との差分から
水位変化率を演算する水位変化率計算部１２と、この水
位変化率に基づいて将来のポンプ井水位を予測するポン
プ井水位予測部１３を有している。The control device 8 sets the target value 1-r of the pump well water level and the control width α
water level control band determination unit 11 that determines a water level control band based on
, a water level change rate calculation unit 12 that calculates a water level change rate from the difference between the current water level of the pump well 4 and the past water level, and a pump well water level prediction unit that predicts the future pump well water level based on this water level change rate. It has a section 13.
また、制御装置８は、ポンプ井４の現在水位，将来水位
，及び水位変化率に基づいて固定速ポンプ５〜５の運転
台数を決定するポンプ運転台数決定部１４と、決定した
運転台数となるように各固定速ポンプ５〜５に運転・停
止指令を出力するポンプ運転・停止部１５を備えている
。The control device 8 also includes a pump operation number determination unit 14 that determines the number of operating fixed speed pumps 5 to 5 based on the current water level, future water level, and water level change rate of the pump well 4, and a pump operation number determination unit 14 that determines the number of operating fixed speed pumps 5 to 5. A pump operation/stop section 15 is provided for outputting operation/stop commands to each of the fixed speed pumps 5 to 5.
次に、動作について説明する。Next, the operation will be explained.
管渠１から下水が流入すると、沈砂池２，スクリーン３
を介してポンプ井４に蓄積され、ポンプ井４の水位が水
位計７によって検出される。そして、水位計７による検
出値しは制御装置８の水位変化率計算部１２，ポンプ井
水位予測部１３．及びポンプ運転台数決定部１４に供給
される。When sewage flows in from pipe 1, it flows into settling basin 2 and screen 3.
The water level in the pump well 4 is detected by the water level gauge 7. Then, the detected value by the water level gauge 7 is determined by a water level change rate calculating section 12 and a pump well water level predicting section 13 of the control device 8. and is supplied to the pump operation number determining unit 14.
水位変化率計算部１２では、水位検出１１ＩＬに基づい
て次の（＋＞， （２）式によって水位変化率Δしを演
算する。The water level change rate calculation unit 12 calculates the water level change rate Δ based on the water level detection 11IL using the following equation (+>, (2)).
ΔＬ＝Ｌｃ （ｔ ）−Ｌｃ （ｔ−Δｔ） ・・
・（１）Ｌｃ （ｊ）＝ａ＋ ・ Ｌ（ｔ −△
ｔ ）＋ａ ２ −ｌ（ｔ−２Δｔ ）
十８３ ・し（【−３△ｔ冫 ・・・〈２〉ただし、
１０ （ｔ ）， ＬＣ （ｔ一Δｔ）はそれぞれ時
刻ｔ１，及び時刻ｔ−△ｔにおけるポンプ井水位演算値
，Ｌ（ｔ一Δｔ），Ｌ（ｔ−２Δｔ）Ｌ （ｔ−３△ｔ
）はそれぞれ時刻ｔ−△１，１−２Δｔ，ｔ−３Δｔに
おけるポンプ井水位検出値，ａｌ，８２．８３は重み係
数，△ｔは演算周期である。ΔL=Lc(t)-Lc(t-Δt)...
・(1) Lc (j)=a+ ・L(t −△
t)+a2-l(t-2Δt) 183 ・shi([-3△t冫...〈2〉However,
10 (t), LC (t-Δt) are the pump well water level calculation values at time t1 and time t-Δt, respectively, L(t-Δt), L(t-2Δt)L (t-3Δt)
) are pump well water level detection values at times t-Δ1, 1-2Δt, and t-3Δt, al, 82.83 are weighting coefficients, and Δt is the calculation period.
そして、（１）式で求められた水位変化率△Ｌは、ポン
プ井水位予測部１３，及びポンプ運転台数決定部１４に
供給される。Then, the water level change rate ΔL obtained by equation (1) is supplied to the pump well water level prediction section 13 and the pump operation number determination section 14.
ここで、（２）式では、過去３回の水位測定値にそれぞ
れ重み係数ａ１，ａ２，ａ３を乗じ、これらを加算して
現在の水位演算値ＬＣ（ｔ）を求めており、（１〉式で
は、《２〉式によって求められる現在の水位演算値ＬＣ
（ｔ）と前回の水位演算値ＬＣ（ｔ一Δｔ）との差を水
位変化率ΔＬとしている。Here, in equation (2), the past three water level measurements are multiplied by weighting coefficients a1, a2, and a3, respectively, and these are added to obtain the current water level calculation value LC(t), and (1> In the formula, the current water level calculation value LC obtained by formula <<2>>
The difference between (t) and the previous water level calculation value LC (t - Δt) is defined as the water level change rate ΔL.
つまり、過去の水位変動の実績に基づいて水位変化率Δ
Ｌを求めているのである。In other words, the water level change rate Δ is calculated based on past water level fluctuation results.
We are looking for L.
ポンプ井水位予測部１３では、この水位変化率△Ｌと、
現在時刻【におけるポンプ井水位検出値Ｌ（ｔ）とに基
づいて時間ΔＴ後のポンプ井水位予測値しＤ Ｃｔ＋
ΔＦ）を次の〈３）式で求める。The pump well water level prediction unit 13 calculates this water level change rate ΔL,
Based on the pump well water level detection value L(t) at the current time [, the pump well water level prediction value after time ΔT is D Ct+
ΔF) is calculated using the following equation (3).
Ｌｐ （ｔ＋△Ｔ）＝Ｌ（ｔ）＋△Ｌ・△Ｔ・・・（
３）
つまり、現在の水位測定値に水位変化率△Ｌによる変化
分を加えることによって時間ΔＴ後の水位予測値Ｌｐ
（ｔ＋Δｔ）を求めているのである。Lp (t+△T)=L(t)+△L・△T...(
3) In other words, by adding the change due to the water level change rate ΔL to the current water level measurement value, the predicted water level value Lp after time ΔT is calculated.
We are looking for (t+Δt).
そして、求められた予測値Ｌｐ （ｔ＋Δ丁）は、ポン
プ運転台数決定部１４に供給される。Then, the obtained predicted value Lp (t+Δt) is supplied to the pump operation number determination unit 14.
一方、水位制御帯決定部１１では、予め設定されたポン
プ井水位の目標値［ｒとυ１御幅αに基づいて、第２図
に示すように各水位帯が求められる。On the other hand, the water level control zone determination unit 11 determines each water level zone as shown in FIG. 2 based on the preset pump well water level target value [r and υ1 width α.
即ち、ポンプ井水位Ｌが（Ｌ＞Ｌｒ＋α〉のとき■水位
帯，水位Ｌが（Ｌｒ一α≦Ｌ≦ｌｒ＋α）ときＯ水位帯
，水位Ｌが（Ｌ＜Ｌｒ一α）のときｅ水位帯と定められ
、これらのデータはポンプ運転台数決定部１４に供給さ
れる。In other words, when the pump well water level L is (L>Lr+α), the ■ water level zone, when the water level L is (Lr-α≦L≦lr+α), the O water level zone, and when the water level L is (L<Lr−α), the e water level zone. These data are supplied to the pump operation number determination unit 14.
そして、ポンプ運転台数決定部１４では、現在のポンプ
井水位Ｌ（ｔ），及び時間ΔＴ後の水位予測値Ｌｐ
（ｔ＋ΔＴ）が、ポンプ運転台数決定部１４で定められ
た各水位帯Φ．Ｏ．ｅのうちどの水位帯に属するかが判
定ざれる。また、ポンプ運転台数決定部１４には、水位
変化率ΔＬが供給され、この符号の正負，及び絶対値の
大きさと、予め設定された水位変化率規定値βに基づい
て、水位変化率ΔＬのランクが次の４つに区分される。Then, the pump operation number determining unit 14 determines the current pump well water level L(t) and the predicted water level Lp after a time ΔT.
(t+ΔT) for each water level zone Φ determined by the number of pumps in operation determining unit 14. O. It is determined which water level zone e belongs to. In addition, the water level change rate ΔL is supplied to the pump operation number determining unit 14, and the water level change rate ΔL is determined based on the sign of this sign, the magnitude of the absolute value, and a preset water level change rate specified value β. Ranks are divided into the following four categories.
（イ） 符号が正で１ΔＬｌ＞β・・・プラスで大（口
〉 符号が正で１ΔＬ１≦β・・・プラスで小（ハ〉
符号が負で１八Ｌｌ＞β・・・マイナスで大（二） 符
号が負で１△Ｌ１≦β・・・マスナスで小方、ポンプ運
転台数決定部１４には、第３図に示す決定表が設定され
ており、ポンプ井水位，及び水位予測値が属する水位帯
．及び水位変化率ΔＬのランクに基づいて運転する固定
速ポンプ５の増減が決定される。例えば、ポンプ井４の
現在水位が■水位帯，時間Δ丁後の水位予測値がΦ水位
帯，そして、水位変化率がプラスで大の場合には、固定
速ポンプ５の運転台数を１台増加させる。(b) If the sign is positive, 1ΔLl>β...plus is large (mouth) If the sign is positive, 1ΔL1≦β...plus is small (c)
If the sign is negative, 18Ll>β...Minus is large (2) If the sign is negative, 1△L1≦β...Minus is small, and the pump operation number determining unit 14 has the determination shown in FIG. A table is set, and the water level band to which the pump well water level and water level prediction value belong. The increase or decrease of the fixed speed pump 5 to be operated is determined based on the rank of the water level change rate ΔL. For example, if the current water level of the pump well 4 is in the ■ water level zone, the predicted water level after time Δt is in the Φ water level zone, and the water level change rate is large and positive, then the number of operating fixed speed pumps 5 is reduced to one. increase.
その後、ポンプ運転・停止部１５では、決定した運転台
数となるように、ポンプ優先度に従って各固定速ポンプ
５〜５へ運転・停止指令を出力する。Thereafter, the pump operation/stop unit 15 outputs operation/stop commands to each of the fixed speed pumps 5 to 5 according to the pump priority so that the determined number of pumps is in operation.
こうして、固定速ポンプ５〜５の運転台数が制御され、
ポンプ井４の水位が所定の範囲内に制御されるのである
。In this way, the number of operating fixed speed pumps 5 to 5 is controlled,
The water level of the pump well 4 is controlled within a predetermined range.
このようにして、本実施例では、過去のポンプ井水位と
現在のポンプ井水位に基づいて水位変化率を求め、この
水位変化率から将来の水位予測値を求めている。そして
、現在の水位，将来の水位予測値，及び、水位変化率に
基づいて固定速ポンプ５〜５の運転台数を決定している
ので、ポンプ井４に流入する下水量が急変した場合でも
予め固定速ポンプ５〜５の運転台数が切換えられてるの
で、安定した水位制御が可能となる。In this manner, in this embodiment, the water level change rate is determined based on the past pump well water level and the current pump well water level, and the future water level prediction value is determined from this water level change rate. Since the number of operating fixed speed pumps 5 to 5 is determined based on the current water level, predicted future water level, and water level change rate, even if the amount of sewage flowing into the pump well 4 changes suddenly, Since the number of operating fixed speed pumps 5 to 5 is switched, stable water level control is possible.
また、目標水位１ｒに対して±αの幅を持たせ、ポンプ
井水位がこの範囲内にある場合には、固定速ポンプ５〜
５の運転台数を変更せず、水位がこの範囲から逸脱した
場合、或いは逸脱すると予測された場合に運転台数を増
減させている。従って、運転・停止の切換えが頻繁に行
なわれることはなく、固定速ポンプ５〜５の寿命を高め
ることができる。In addition, a width of ±α is given to the target water level 1r, and when the pump well water level is within this range, the fixed speed pumps 5 to
5 remains unchanged, and the number of operating vehicles is increased or decreased when the water level deviates from this range or is predicted to deviate from this range. Therefore, switching between operation and stop is not performed frequently, and the life of the fixed speed pumps 5 to 5 can be extended.
［発明の効果］
以上説明したように、本発明では、ポンプ井の現在水位
，将来の水位予測値，及び水位変化率に基づいて固定速
ポンプの運転台数を決定している。[Effects of the Invention] As described above, in the present invention, the number of operating fixed speed pumps is determined based on the current water level of the pump well, the predicted future water level, and the water level change rate.
従って、水位の変化に対して固定速ポンプの運転台数を
先行して制御することができるので、流入下水量が急変
した場合でも安定に制御することが可能となる。Therefore, the number of operating fixed speed pumps can be controlled in advance of changes in the water level, making it possible to perform stable control even when the amount of inflowing sewage changes suddenly.
その結果、従来のように、蓄積された汚水がオーバーフ
ローしたり、無水状態になるという不具合は解消され、
ポンプ井水位が常時所定の範囲内に納まるようになると
いう効果が得られる。As a result, the conventional problems of accumulated sewage overflowing or becoming waterless have been eliminated.
The effect is that the pump well water level always stays within a predetermined range.
第１図は本発明の一実施例を示す構成図、第２図は水位
制御帯決定部において決められたポンプ井の水位帯を示
す説明図、第３図はポンプ運転台数決定部に設定されて
いる決定表である。
また、第４図は従来例を示す構成図、第５図は従来の各
固定速ポンプの運転・停止水位を示す説明図である。
４・・・ポンプ井 ５・・・固定速ポンプ７・・・水位
計 ８・・・制御装置
１１・・・水位制御帯決定部
１２・・・水位変化率計算部
１３・・・ポンプ井水位予測部
１４・・・ポンプ運転台数決定部
第 ２図FIG. 1 is a configuration diagram showing an embodiment of the present invention, FIG. 2 is an explanatory diagram showing the water level zone of the pump well determined by the water level control zone determination section, and FIG. This is a decision table. Further, FIG. 4 is a configuration diagram showing a conventional example, and FIG. 5 is an explanatory diagram showing operation/stop water levels of each conventional fixed speed pump. 4...Pump well 5...Fixed speed pump 7...Water level gauge 8...Control device 11...Water level control zone determination section 12...Water level change rate calculation section 13...Pump well water level Prediction unit 14... Pump operation number determination unit Fig. 2
Claims (1)
水位を調節する固定速ポンプの運転台数制御装置におい
て、 前記ポンプ井の水位を検出する水位計と、 前記ポンプ井の現在の水位と過去の水位との差分から水
位変化率を演算する水位変化率演算手段と、 前記水位変化率に基づいて将来のポンプ井の水位を予測
する水位予測手段と、 ポンプ井の現在水位、将来の水位、及び水位変化率に基
づいて前記固定速ポンプの運転台数を決定する運転台数
決定手段と、 を有することを特徴とする固定速ポンプの運転台数制御
装置。[Scope of Claim] A device for controlling the number of operating fixed speed pumps that controls the number of operating fixed speed pumps to adjust the water level of a pump well, comprising: a water level meter that detects the water level of the pump well; water level change rate calculation means for calculating a water level change rate from the difference between the current water level of the well and the past water level; a water level prediction means for predicting the future water level of the pump well based on the water level change rate; A device for controlling the number of fixed speed pumps in operation, comprising: a number-of-operation determining means for determining the number of fixed-speed pumps in operation based on the current water level, future water level, and water level change rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22940789A JPH0396675A (en) | 1989-09-06 | 1989-09-06 | Operation pump number control device of fixed speed pumps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22940789A JPH0396675A (en) | 1989-09-06 | 1989-09-06 | Operation pump number control device of fixed speed pumps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0396675A true JPH0396675A (en) | 1991-04-22 |
Family
ID=16891733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22940789A Pending JPH0396675A (en) | 1989-09-06 | 1989-09-06 | Operation pump number control device of fixed speed pumps |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0396675A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0450496A (en) * | 1990-06-18 | 1992-02-19 | Kubota Corp | Control of operating number of all-level operation pump |
| JP2010007522A (en) * | 2008-06-25 | 2010-01-14 | Meidensha Corp | Method and device for controlling the number of pumps |
| US8373797B2 (en) | 2006-05-29 | 2013-02-12 | Sony Corporation | Image display apparatus, signal processing apparatus, image display method, and computer program product |
-
1989
- 1989-09-06 JP JP22940789A patent/JPH0396675A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0450496A (en) * | 1990-06-18 | 1992-02-19 | Kubota Corp | Control of operating number of all-level operation pump |
| US8373797B2 (en) | 2006-05-29 | 2013-02-12 | Sony Corporation | Image display apparatus, signal processing apparatus, image display method, and computer program product |
| JP2010007522A (en) * | 2008-06-25 | 2010-01-14 | Meidensha Corp | Method and device for controlling the number of pumps |
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