ACOUSTIC TYPE FLUID-TEMPERATURE MEASURING APPARATUS

Japanese Patent JPH02198328

A

PURPOSE:To shorten a signal processing time largely by arranging two memory units between an A/D converter and a correlation operator. CONSTITUTION:Two memory units 19 and 20 are provided between an A/D converter and a correlation operator 13. A memory switching device 18 is provided between the memory units 19 and 20 and the converter 10. A control device 1 controls the switching device 18 based on a memory switching signal. When waveform data which are measured at the previous time are received in the memory 19, the waveform data which are measured this time are inputted into the memory 20 by the control of the switching device 18. When the waveform data which are measured at the previous time are received in the memory 20, the waveform data which are measured this time are inputted into the memory 19 by the control of the switching device 18. In the signal processing at this time, correlation between the propagation signal data in the memory 20 and the waveform data in the memory 19 is performed in the period from the negative several-hundred data at the arriving time of the propagation time of the previous time to positive several-hundred data. Thus the signal processing time can be shortened.

IMADA NORIYUKI
YOSHIZAKO HIDEHISA

JP1826889A

August 06, 1990

January 27, 1989

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BABCOCK HITACHI KK

G01K11/24; (IPC1-7): G01K11/24

Kawakita Takecho

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