JPH0327849B2

JPH0327849B2 -

Info

Publication number: JPH0327849B2
Application number: JP60249748A
Authority: JP
Inventors: Akinori Nakazawa
Original assignee: DAMU GIJUTSU SENTAA
Current assignee: DAMU GIJUTSU SENTAA
Priority date: 1985-11-07
Filing date: 1985-11-07
Publication date: 1991-04-17
Also published as: JPS62108116A

Description

【発明の詳細な説明】（産業上の利用分野）本発明は、水門等の操作において、その放流量
に調節する際に使用される流量測定方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a flow rate measuring method used when adjusting the discharge rate during operation of a water gate or the like.

（従来の技術）ダム及び堰等に備えられる水門は、その開閉に
よつて放流量を調節するもので、その調節に際し
ては、常時放流量、即ち水門からの流量を監視し
ておく必要がある。(Prior art) Sluice gates installed in dams, weirs, etc. adjust the amount of water released by opening and closing them, and when making adjustments, it is necessary to constantly monitor the amount of water released, that is, the amount of flow from the water gates. .

この流量を監視するため従来より流れをせき止
めるように水門扉を設け、この水門扉の上端を越
えて流れる水流の越流水深（水面から水門扉上端
までの深さ）を検出することで流量を測定するよ
うにした流量測定方法が使用されている。 In order to monitor this flow rate, a water gate is conventionally installed to dam the flow, and the flow rate can be monitored by detecting the overflow depth (depth from the water surface to the top of the water gate) of the water flowing beyond the top of the water gate. A method of measuring flow rate is used.

第２図、第３図はかかる従来の技術を示す図で
あり、第２図は水門扉を閉じた状態を示す図、第
３図は水門扉を開いた状態を示す図である。 FIGS. 2 and 3 are diagrams showing such conventional techniques, with FIG. 2 showing the water gate in a closed state and FIG. 3 showing the water gate in an open state.

図において、１０８は水面、１０１は水門扉、
１０４はコンクリートピア、１０５は水門開閉
機、１１０は開度計、１１１は水位計、１１２は
フロートである。 In the figure, 108 is the water surface, 101 is the water gate,
104 is a concrete pier, 105 is a water gate opening/closing machine, 110 is an opening gauge, 111 is a water level gauge, and 112 is a float.

前記水門扉１０１は底部が固定された下段扉１
０２と、この下段扉１０２に対して上下動可能に
設けられた上段扉１０３とからなり、前記開閉機
１０５は、この上段扉１０３を上下動させること
で第３図に示すように上段扉上端１０３ａより越
流する流量を調節する。 The water gate door 101 is a lower door 1 whose bottom part is fixed.
02, and an upper door 103 that is provided to be able to move up and down relative to the lower door 102, and the opening/closing machine 105 moves the upper door 103 up and down to open the upper end of the upper door as shown in FIG. The flow rate overflowing from 103a is adjusted.

そして前記開度計１１０は、上段扉上端１０３
ａからコンクリートピア１０４の所定位置Ｐ−Ｐ
までの高さH₁を測定し、又、前記水位計１１１
は水面１０８、即ちフロート１１２から同じくコ
ンクリートピア１０４の所定の位置Ｐまでの高さ
H₂を測定する。 The opening gauge 110 is connected to the upper end 103 of the upper door.
Predetermined position P-P of concrete pier 104 from a
Measure the height _H1 up to, and also measure the water level gauge 111
is the height from the water surface 108, that is, the float 112 to a predetermined position P on the concrete pier 104.
Measure _H2 .

かかる構成において、越流水深Ｈは、開度計１
１０及び水位計１１１の測定値H₁、H₂よりＨ＝
H₁−H₂として求まり、この越流水深Ｈより求め
られる流量ＷはＷ＝AH^3/2（Ａは定数）として得
られる。 In such a configuration, the overflow water depth H is determined by the opening meter 1.
From the measured values H ₁ and H ₂ of 10 and water level gauge 111, H=
It is determined as H ₁ - H ₂ , and the flow rate W determined from this overflow water depth H is obtained as W=AH ^3/2 (A is a constant).

（発明が解決しようとする問題点）このように従来の流量測定方法においては、越
流水深を求めるに際し、開度計と水位計の双方よ
り得られる値を使用している。(Problems to be Solved by the Invention) As described above, in the conventional flow rate measurement method, when determining the overflow water depth, values obtained from both the opening meter and the water level meter are used.

しかしながらこれらの計測器は夫々許容精度が
定められており、これらより得られる測定値は一
定範囲内における誤差を有する。従つて越流水深
を求めるに際し、これらの誤差が加算されるよう
な場合（例えば開度計の測定値が真値よりも大き
く、水位計の測定値が真値よりも小さく得られる
ような場合）には最終誤差が大きくなり、測定値
に対する精度は夫々の計測器が有する精度よりも
低くなる。 However, each of these measuring instruments has a defined allowable accuracy, and the measured values obtained from these instruments have errors within a certain range. Therefore, when determining the overflow water depth, in cases where these errors are added (for example, when the measured value of the opening gauge is larger than the true value and the measured value of the water level gauge is smaller than the true value) ), the final error will be large and the accuracy for the measured value will be lower than the accuracy possessed by the respective measuring instruments.

しかも越流水深である１の値を測定するために
開度計と水位計の２の計測器を使用したのでは、
経済性、メンテナンス性が悪く、更に２の計測器
が共に正常でなくては機能を成さないため故障率
が高く信頼度が低くなる。 Moreover, in order to measure the value 1, which is the overflow water depth, 2 measuring instruments, an opening gauge and a water level gauge, were used.
It is not economical and maintainable, and since it cannot function unless both measuring instruments are normal, the failure rate is high and the reliability is low.

そこで本発明はかかる従来の問題点を解決すべ
く成されたもので、その目的とする処は精度が高
く、経済性、メンテナンス性に優れ、又信頼度に
も優れた流量測定方法を提供するにある。 The present invention was made to solve these conventional problems, and its purpose is to provide a flow rate measurement method that is highly accurate, economical, easy to maintain, and highly reliable. It is in.

（問題点を解決するための手段）前記問題点を解決するため本発明は、扉体３の
所定の位置における水圧を測定し、この水圧値に
基づいて越流水深Ｈを測定するようにしてなる。(Means for solving the problem) In order to solve the above problem, the present invention measures the water pressure at a predetermined position of the door body 3, and measures the overflow water depth H based on this water pressure value. Become.

（作用）扉体３の所定の位置における水圧が測定された
ならば、水の比重量よりこの所定の位置における
水深Ｄが分かる。従つて、前記所定の位置から水
が越流する扉体３の上端３ａまでの高さＬを定め
ておけば、前記水深Ｄからこの高さを差し引くこ
とで越流水深Ｈを求めることができ、測定器は水
圧計１のみで足りる。(Function) Once the water pressure at a predetermined position of the door body 3 is measured, the water depth D at this predetermined position can be determined from the specific weight of water. Therefore, if the height L from the predetermined position to the upper end 3a of the door body 3 from which water overflows is determined, the overflow water depth H can be obtained by subtracting this height from the water depth D. , only the water pressure gauge 1 is sufficient as a measuring device.

（実施例）以下に本発明を添付図面に基づいて説明する。(Example) The present invention will be explained below based on the accompanying drawings.

実施例はダム等からの放流量の測定に本発明を
適用したもので第１図は本発明に係る流量測定方
法を示す。図において１は水門であり、この水門
扉１は底部が固定された下段扉５と、この下段扉
２に対し上下動し、放流量（越流水深）を調節す
る上段扉３とからなる。４はこの水門１を支持す
るコンクリートピアであり、この上部には前記上
段扉３を上下動せしめる水門開閉機５が設けられ
る。 In this embodiment, the present invention is applied to the measurement of the discharge amount from a dam, etc., and FIG. 1 shows the flow measurement method according to the present invention. In the figure, 1 is a water gate, and this water gate door 1 consists of a lower door 5 with a fixed bottom, and an upper door 3 that moves up and down with respect to the lower door 2 to adjust the discharge amount (overflow water depth). A concrete pier 4 supports the water gate 1, and a water gate opening/closing machine 5 for moving the upper door 3 up and down is provided on the upper part of the concrete pier.

前記上段扉３の水流Ａに対向する扉面上３ｂに
は、上段扉上段３ａより距離Ｌだけ低い位置に、
この位置における水圧を測定するための圧力セン
サ６が設けられ、この検出値は水圧表示器７によ
つて示される。この圧力センサ６には例えば水晶
振動子を利用した力−周波数変換器が使用され
る。 On the upper door surface 3b of the upper door 3 facing the water flow A, at a position lower than the upper door upper 3a by a distance L,
A pressure sensor 6 is provided to measure the water pressure at this location, and the detected value is indicated by a water pressure indicator 7. For this pressure sensor 6, for example, a force-frequency converter using a crystal oscillator is used.

かかる構成において、今、圧力センサ６からの
検出値に分かれば、水の比重量から、圧力センサ
６に設けた所定の位置の水深Ｄが分かり、上段扉
上端３ａから水面８までの距離（越流水深）Ｈ
が、Ｈ＝Ｄ−Ｌとして得られ、これより流量Ｗ
は、Ｗ＝AH^3/2（Ａは定数）として求まる。 In such a configuration, if the detected value from the pressure sensor 6 is known now, the water depth D at a predetermined position provided on the pressure sensor 6 can be found from the specific weight of water, and the distance from the upper end 3a of the upper door 3a to the water surface 8 (overflow) can be determined. Water depth)H
is obtained as H=D−L, and from this the flow rate W
is determined as W=AH ^3/2 (A is a constant).

このように本実施例によれば、上下に可動とさ
れた上段扉３の所定の位置に圧力センサ６を取り
付けることにより、上段扉３の上下動に拘らず水
圧のみを測定することで、越流水深を求めること
ができ、従来、２の測定器を必要としたものを、
１の測定器のみで行うことができる。 In this way, according to this embodiment, by attaching the pressure sensor 6 to a predetermined position of the upper door 3 that is movable up and down, only the water pressure can be measured regardless of the vertical movement of the upper door 3, thereby making it possible to The depth of flowing water can be determined, which previously required two measuring devices.
This can be done with only one measuring device.

（発明の効果）以上の説明より明らかな如く、本発明によれば
１の測定器のみで流量測定を行うことができ、従
つて精度が高く、経済性及びメンテナンス性に優
れ、又信頼度にも優れた流量測定方法を提供する
ことができる。(Effects of the Invention) As is clear from the above explanation, according to the present invention, it is possible to measure the flow rate with only one measuring device, and therefore the accuracy is high, the economy and maintainability are excellent, and the reliability is high. can also provide an excellent flow measurement method.

また、扉対を構成する上段扉に設けた圧力セン
サで水圧を直接測定するので、水圧測定のために
特別な水路や測定孔等の設備を設けることを必要
とせず簡便に流量測定ができる。 Furthermore, since the water pressure is directly measured by the pressure sensor provided on the upper door of the door pair, the flow rate can be easily measured without requiring special facilities such as water channels or measurement holes for water pressure measurement.

[Brief explanation of drawings]

第１図は本発明に係る流量測定方法を示す図、
第２、第３図は従来の技術を示す図である。そして図面中、１……水門扉（扉体）、２……
下段扉、３……上段扉、５……開閉機、６……圧
力センサ、８……水面、Ａ……水流方向、Ｈ……
越流水深、である。 FIG. 1 is a diagram showing a flow rate measurement method according to the present invention;
2 and 3 are diagrams showing the conventional technology. And in the drawing, 1...water gate (gate body), 2...
Lower door, 3...Upper door, 5...Opening/closing machine, 6...Pressure sensor, 8...Water surface, A...Water flow direction, H...
The overflow water depth is.

Claims

[Claims] 1. A flow rate measurement method in which a door body is provided so as to dam water flow, and the flow rate is measured by detecting the overflow water depth, wherein the overflow water depth is determined at a predetermined position of the door body. 1. A method for measuring a flow rate, characterized in that the water pressure is detected by measuring the water pressure at a predetermined position of an upper door constituting the door body. 2. The flow rate measuring method according to claim 1, wherein the door body is provided so that its height can be changed in order to change the overflow water depth.