Title:
AUTOMATIC DAM GATE CONTROLLER
Document Type and Number:
Japanese Patent JPS63301312
Kind Code:
A
Abstract:
PURPOSE:To prevent the discharge of a dam at the value larger than the maximum control level of discharge and at the same time to eliminate the error between the actual discharge value and that of the printed result, by calculating again a target opening amount of the gate at a time point of the dam level has a change during the gate working, and reflecting the result of said calculation to the gate action. CONSTITUTION:A target level 2 and the actual value of a level meter 3 are supplied via an automatic gate controller 1 together with the output of an opening amount meter 4 for opening amount of a gate 5. Thus it is possible to always have the input of the present dam level even while the gate 5 is working. Then a target opening amount can be calculated again in accordance with the dam level at a time point when the dam level has a change. Thus no error is produced between the discharge value set at a time point of the gate operation is through and the calculated target discharge value.
Inventors:
KAWABATA MASAHARU
MORI AKIO
SATO KOHEI
MORI AKIO
SATO KOHEI
Application Number:
JP13490287A
Publication Date:
December 08, 1988
Filing Date:
June 01, 1987
Export Citation:
Assignee:
HITACHI LTD
HITACHI ENG CO LTD
HITACHI ENG CO LTD
International Classes:
G05D9/12; (IPC1-7): G05D9/12
Attorney, Agent or Firm:
Katsuo Ogawa