Fluidic pressure ratio sensor

Details Fluidic pressure ratio sensor Fluidic pressure ratio sensor

1979-05-25

1981-01-13

Goldstein, Herbert

Measuring and testing

Vehicle drive train

Rear end

7386132, 73700, G01F 700

Patent

active

042442125

ABSTRACT:
A pressure ratio detector having a housing with a flow channel through the housing. A plug, having helical grooves, is positioned in the flow channel. A sudden expansion region is provided in the flow channel downstream of the plug which induces a nutation in the flow. The acoustic nutational frequencies are measured with a piezoelectric transducer to provide an output signal proportional to the pressure ratio across the device. An orifice device is provided in the inlet to adapt the device for measuring pressure ratios greater than 2.0.

REFERENCES:
patent: 1511765 (1924-10-01), Latham
patent: 3279251 (1966-10-01), Chanaud
patent: 3559482 (1971-02-01), Baner et al.
patent: 3616693 (1971-11-01), Burgess
patent: 3774447 (1973-11-01), Fitch
patent: 3792609 (1974-02-01), Blair et al.
patent: 3890838 (1975-06-01), Paetzold
patent: 3937082 (1976-02-01), Schilling

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