Title:
INTERFACE DETECTOR FOR PULSE COLUMN
Document Type and Number:
Japanese Patent JPS63179221
Kind Code:
A
Abstract:
PURPOSE:To accurately detect interface by providing a linear array type transmitter receiver on an external wall nearby the interface between a light and a heavy liquid phases and scanning respective arrays and detecting a point where a reflected wave between the wall and liquid phases varies in signal level discontinuously as an interface position. CONSTITUTION:The linear array type transmitter receiver 14 equipped with many arrays is provided nearby the interface 11 between the light liquid phase and heavy liquid phase and the respective arrays are switched with the scanning signal 18A of a scanning signal control circuit 18. Further, the scanning reference signal of the circuit 18 is inputted to a counter 19 and an echo when the respective arrays are scanned is sent out to a CPU 22 through an input/output port 21. Then a difference in the attenuation of an ultrasonic wave sent by the transmitter receiver 14 with the difference in acoustic impedance among the wall, light liquid phase, and heavy liquid phase is utilized to count the number of arrays in small in echo height by a counter 19, thereby sending the analog output of the counted value. Consequently, the interface is accurately detected.
Inventors:
ITO YOSHIBUMI
YASHIMA MINORU
IDEUE KAZUO
YASHIMA MINORU
IDEUE KAZUO
Application Number:
JP1034887A
Publication Date:
July 23, 1988
Filing Date:
January 20, 1987
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD
International Classes:
B01D11/04; G01F23/28; G01F23/296; G01N29/02; G21C19/46; G01N29/28; (IPC1-7): B01D11/04; G01F23/28; G01N29/02; G21C19/46
Attorney, Agent or Firm:
Takehiko Suzue