Pressure transducer

Details Pressure transducer Pressure transducer

1978-04-20

1979-03-27

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Electrical

73119A, G01L 910, G01M 1500

Patent

active

041459326

ABSTRACT:
A pressure transducer, especially for measuring induction tube pressure in an internal combustion engine. The transducer includes an electrical inductor with a movable core displaced by pressure differences. The inductor is connected to a power source across a switch actuated by periodic triggering pulses. The voltage across the inductor is applied to a threshold detector which generates a binary level output signal, the duration of which is related to the inductive impedance of the inductor and thus to pressure. A logic gate receives the triggering pulses and the threshold detector output and generates an output pulse whose duration is related to the pressure. In another embodiment, the binary level output signal from the threshold detector is the output signal of the transducer.

REFERENCES:
patent: 3745817 (1973-07-01), Williams et al.
"Electronic Fuel Injection . . .", Electronics, Sep. 11, 1972, pp. 121-125.

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