| 摘要 |
<p>An electronic filter conditioning a primary flow signal generated by a flowmeter comprises a first parallel bank of electronic filters including a first plurality (7) of band pass filters respectively including a first plurality (10) of electronic switches controlled by a first command signal generated from an auxiliary flow signal provided by an accessory flow sensor (13), and a second and third plurality (8 and 9) of band pass filters respectively including a second and third plurality (11 and 12) of electronic switches respectively controlled by a second and third command signals generated from the frequencies of the primary flow signal respectively detected at an output and input sides of the first parallel bank of electronic filters, and a second parallel bank of electronic filters (25) including a plurality of band pass filters respectively including a plurality of electronic switches controlled by a command signal generated from the frequency of the primary flow signal; wherein the primary flow signal preconditioned by the first parallel bank of electronic filters is further conditioned by the second parallel bank of electronic filters.</p> |
