JPS57114911A - Control method for free flow gate - Google Patents
Control method for free flow gateInfo
- Publication number
- JPS57114911A JPS57114911A JP41881A JP41881A JPS57114911A JP S57114911 A JPS57114911 A JP S57114911A JP 41881 A JP41881 A JP 41881A JP 41881 A JP41881 A JP 41881A JP S57114911 A JPS57114911 A JP S57114911A
- Authority
- JP
- Japan
- Prior art keywords
- alpha
- gate
- water level
- value
- control
- 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/20—Movable barrages; Lock or dry-dock gates
- E02B7/205—Barrages controlled by the variations of the water level; automatically functioning barrages
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Control Of Non-Electrical Variables (AREA)
- Barrages (AREA)
Abstract
PURPOSE:To avoid the damage to a gate due to flowing woods without delay in control and to achieve transition of the gate to oriffice state at all times, by keeping the distance between the dam water level and the gate lower end accompanied with the movement of the water level constant. CONSTITUTION:First, a prescribed distance A0 is provided from the water surface and a prescribed band width alpha is determined with respect to it. The value of A0-alpha is taken for a sufficient value not causing the damage to the gate due to flowing woods. Further, the value of A0+alpha is taken for a value moved to the water surface with a time less than the control sampling time. Next, the gate opening and the dam water level are fetched at every control sampling time, the water level variance is obtained from the previous water level, the maximum value is obtained by comparing it with the previous water level variance and the interval An between te gate lower end and the dam water level is obtained. When the An is An<A0-alpha or An>A0+alpha, gate control is made so that the An is A0. When A0-alpha<=An<=A0+alpha, no gate control is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP41881A JPS57114911A (en) | 1981-01-07 | 1981-01-07 | Control method for free flow gate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP41881A JPS57114911A (en) | 1981-01-07 | 1981-01-07 | Control method for free flow gate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57114911A true JPS57114911A (en) | 1982-07-17 |
Family
ID=11473246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP41881A Pending JPS57114911A (en) | 1981-01-07 | 1981-01-07 | Control method for free flow gate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57114911A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6255713A (en) * | 1985-09-04 | 1987-03-11 | Mitsubishi Electric Corp | Automatic gate controller |
| JP2007231609A (en) * | 2006-03-01 | 2007-09-13 | Hitachi Ltd | Gate discharge amount calculating method and dam controller |
-
1981
- 1981-01-07 JP JP41881A patent/JPS57114911A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6255713A (en) * | 1985-09-04 | 1987-03-11 | Mitsubishi Electric Corp | Automatic gate controller |
| JP2007231609A (en) * | 2006-03-01 | 2007-09-13 | Hitachi Ltd | Gate discharge amount calculating method and dam controller |
| JP4587978B2 (en) * | 2006-03-01 | 2010-11-24 | 株式会社日立製作所 | Gate discharge flow rate calculation method and dam control device |
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