Suction air measuring device

Details Suction air measuring device Suction air measuring device

1988-03-11

1989-11-14

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

731182, G01F 132

Patent

active

048799084

ABSTRACT:
A suction air measuring device comprises vortex detection means for detecting a Karman vortex signal of vortex in a suction conduit of an engine as a digital signal and storing it in a storage means at a predetermined time period and digitizing means for digitizing an output of the vortex detection means to obtain a Karman vortex pulse signal, setting or resetting the Karman vortex pulse signal when an output of the vortex detection means increases from a lower extreme thereof resetting or setting the Karman vortex signal when the output of the vortex detection means decreases from an upper extreme thereof by a predetermined value.

REFERENCES:
patent: 3881352 (1975-05-01), McShane
patent: 4240299 (1980-12-01), Joy et al.

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