DENG, WENPENG,BENNETT, JAN,HEALY, DAVID,DAMES, ANDREW NICHOLAS,EVETT, JAMES WILLIAM
申请号：
CA3073337
公开号：
CA3073337A1
申请日:
2018.08.30
申请国别(地区):
CA
年份:
2019
代理人:
摘要：
A method for an ultrasonic time-of-flight flow meter (1) includes driving an ultrasonic transducer (2, 3) using a first waveform (V 1 (t)) for a first duration (?t 1 ), the first waveform ( V 1 ,(t)) configured to cause oscillation (21) of the ultrasonic transducer (2, 3), The method also includes driving the ultrasonic transducer (2, 3) using a second waveform (V 2 (t)) for a second duration (?t 2 ). There is a discontinuity between the first waveform (V 1 (t)) and the second waveform (V 2 (t)). The second waveform (V 2 (t)) and the second duration (?t 2 ) are configured to maintain a voltage (V t -(t)) across the ultrasonic transducer (2, 3) within a predetermined range (V h , V L ).
