Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
FLOW RATE CONTROL DEVICE
Document Type and Number:
Japanese Patent JP3146240
Kind Code:
B2
Abstract:

PURPOSE: To perform feedback control with high accuracy by correcting a measurement error in a flow sensor due to temperature change.
CONSTITUTION: This device is provided with a flow control valve 2 which is installed in a working oil passage of a hydraulic actuator 31 and opened/closed according to a driving signal, a valve driving means 32 which drives the flow control valve 2 according to the preset directed flow rate Qr and feedback flow rate Qf, a flow measuring means 33 which measures flow rate of the flow control valve 2, and a displacement measuring means 34 which measures displacement of the hydraulic actuator 31. Also, there are provided a time measuring means 35 which measures time taken until output has reached a prescribed displacement, a means 36 which integrates the measured flow rate Qi of the flow measuring means 33 by a start value and an end value of the time measuring means 35 and calculates virtual displacement Li of the hydraulic actuator 31, and a measured flow rate correcting means 37 which corrects the measured flow rate Qi by the imaginy displacement Li and the prescribed displacement Lo and calculates the feedback flow rate Qf.


More Like This:
Inventors:
Kawasaki, Haruhiko
Maehata, Kazuhide
Application Number:
JP1991000294374
Publication Date:
March 12, 2001
Filing Date:
November 11, 1991
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
KAYABA IND CO LTD
International Classes:
F15B9/09; F15B11/04; G05D7/06; G05D16/20; (IPC1-7): F15B9/09; F15B11/04; G05D7/06; G05D16/20
Attorney, Agent or Firm:
後藤 政喜 (外1名)