Ultrasonic flowmeter
An ultrasonic flowmeter, wherein upstream and downstream receive signals are A/D-converted and thereby the discrete values thereof are determined: a cross-correlation between the upstream and downstream receive signals is determined: the result of calculation by correlation processing means is Hilbe...
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| Main Author | |
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| Format | Patent |
| Language | English |
| Published |
03.10.2002
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| Online Access | Get full text |
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| Summary: | An ultrasonic flowmeter, wherein upstream and downstream receive signals are A/D-converted and thereby the discrete values thereof are determined: a cross-correlation between the upstream and downstream receive signals is determined: the result of calculation by correlation processing means is Hilbert-transformed; a phase relationship is determined by phase calculating means from the results of calculation by the correlation processing means and calculation by Hilbert transform; and a time difference in calculated from the phase calculation result provided by the phase calculating means through maximum value decision means. |
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