Title:
PUMP CONTROLLER
Document Type and Number:
Japanese Patent JPS63127312
Kind Code:
A
Abstract:
PURPOSE:To improve the tracking performance of pump drive and to prevent a pump well from being flooded by outputting a start command to a pump by an OR output between an AND output between a water level deviation signal and a turbidity signal and a signal of a water level arithmetic circuit. CONSTITUTION:A water level deviation detection circuit 3 differentiates a water level signal 2 of a pump well 20 and outputs a water level deviation signal 4 when the result reaches a specified value or over. When a turbidity detection circuit 6 outputs a turbidity signal 5 when a turbidity signal 5 of the pump well 20 reaches a prescribed value or over. An AND circuit 8 ANDs the signals 4, 7 to output a start signal 11. Moreover, when the level of the signal 2 reaches a preset water level, a water level arithmetic circuit 9 outputs a start signal 10 and an OR output of an OR circuit 12 between the signals 10 and 11 becomes a start command 13 to the pump 14. Through the constitution above, when the pump well 20 is small or a water flow is too much due to a large rainfall, the start command of the pump is outputted quickly to improve the pump tracking performance thereby preventing the pump well from being submerged.
Inventors:
HENMI YOSHIRO
Application Number:
JP27290686A
Publication Date:
May 31, 1988
Filing Date:
November 18, 1986
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
G05D9/00; C02F1/00; F04D7/04; F04D15/00; (IPC1-7): C02F1/00; F04D7/04; F04D15/00; G05D9/00
Attorney, Agent or Firm:
Noriyuki Noriyuki