| 摘要 |
<p>A method of detecting and aligning a signal in an ultrasonic flow meter (18) generates an oscillator signal (50) and a transmit sequence (54) on a first predetermined trigger point (55) of the oscillator signal (50). The transmit sequence (54) is used to drive a transmit transducer (14, 16) to form a transmit waveform (60). The transmit waveform (60) is received by a receive transducer (14, 16) to form a received waveform. The received waveform is processed to form a received sequence (62). The received sequence (62) is then processed to sense an anomaly (80).</p> |
