JPS5569017A - Calculation system for dam flow - Google Patents

Calculation system for dam flow

Info

Publication number
JPS5569017A
JPS5569017A JP14235278A JP14235278A JPS5569017A JP S5569017 A JPS5569017 A JP S5569017A JP 14235278 A JP14235278 A JP 14235278A JP 14235278 A JP14235278 A JP 14235278A JP S5569017 A JPS5569017 A JP S5569017A
Authority
JP
Japan
Prior art keywords
flow
hold time
water level
circuit
steps
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
Application number
JP14235278A
Other languages
Japanese (ja)
Inventor
Satoru Kubota
Fumito Shinomiya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP14235278A priority Critical patent/JPS5569017A/en
Priority to GB7937372A priority patent/GB2034906B/en
Publication of JPS5569017A publication Critical patent/JPS5569017A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52—Details
    • G03B27/522—Projection optics
    • G03B27/525—Projection optics for slit exposure
    • G03B27/526—Projection optics for slit exposure in which the projection optics move
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/28—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which projection is obtained by line scanning
    • G03G15/30—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which projection is obtained by line scanning in which projection is formed on a drum

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)

Abstract

PURPOSE: To perform surfficient flat effect at average water flow, by performing calculation without causing delay to the flow at overflood, through measuring the hold time of the water level in dam and automatically selecting the number of steps of flow smoothness from the result.
CONSTITUTION: The relation between the water level hold time ΔT and the flow smoothing number of steps n is stored in the ΔT-n memory circuit 23 from the hydraulics in advance, and the present water level hold time ΔT calculated at the water level hold time calculation circuit 3 is detected at the comparison circuit 21 whether it corresponds to either band of the ΔT table stored in the circuit 23. Further, the number of steps n corresponding to ΔT is automatically selected at the smoothing constant selection circuit 22 and the smoothing of the flow is made by using the selected n. As a result, if the ΔT at average water flow is longer, the effect by external disturbance is removed by increasing n, and if the flow is increased, the delay in the flow calculation can be reduced by decreasing n.
COPYRIGHT: (C)1980,JPO&Japio
JP14235278A 1978-11-20 1978-11-20 Calculation system for dam flow Pending JPS5569017A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP14235278A JPS5569017A (en) 1978-11-20 1978-11-20 Calculation system for dam flow
GB7937372A GB2034906B (en) 1978-11-20 1979-10-29 Electrostatic copying apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14235278A JPS5569017A (en) 1978-11-20 1978-11-20 Calculation system for dam flow

Publications (1)

Publication Number Publication Date
JPS5569017A true JPS5569017A (en) 1980-05-24

Family

ID=15313366

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14235278A Pending JPS5569017A (en) 1978-11-20 1978-11-20 Calculation system for dam flow

Country Status (2)

Country Link
JP (1) JPS5569017A (en)
GB (1) GB2034906B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59180331A (en) * 1983-03-30 1984-10-13 Meidensha Electric Mfg Co Ltd Flow rate measuring device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59100429A (en) * 1982-11-30 1984-06-09 Mita Ind Co Ltd Driving device for moving body for exposure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59180331A (en) * 1983-03-30 1984-10-13 Meidensha Electric Mfg Co Ltd Flow rate measuring device

Also Published As

Publication number Publication date
GB2034906B (en) 1983-02-09
GB2034906A (en) 1980-06-11

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