| 摘要 |
PCT No. PCT/US82/00733 Sec. 371 Date May 26, 1982 Sec. 102(e) Date May 26, 1982 PCT Filed May 26, 1982.A mass air flow sensor (10) has a vortex generator (12) positioned in the air flow for generating two streams of vortices. Spaced vortex detectors (20), (22) are each positioned the same distance downstream of vortex generator (12) in one of the two streams of vortices. Vortex detectors (20), (22) are coupled to a differential amplifier (24) which reduces noise signals applied equally to vortex detectors (20), (22) and enhances vortex signals alternately applied to vortex detectors (20), (22).
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