Electromechanical pressure transducer

Details Electromechanical pressure transducer Electromechanical pressure transducer

1980-02-19

1982-04-27

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

With pressure and/or temperature compensation

73728, G01L 1904

Patent

active

043264190

ABSTRACT:
An electromechanical transducer for transforming pressure fluctuations into varying electrical signals, especially for use as the induction tube pressure sensor for an internal combustion engine. A Hall-effect sensor moves within a local magnetic field to detect changes in pressure which alter the configuration of a diaphragm or diaphragm bellows to which the Hall-generator is attached. In order to suppress temperature-dependent terms in the Hall voltage equation, the invention provides for periodically alternating energization of the electromagnets, i.e., for alternation or alternating shut-off of the magnetic field. The Hall voltages measured during the two states of the magnetic field are subtracted from one another, thereby eliminating the temperature-dependent term. A number of configurations of the transducer elements is presented.

REFERENCES:
patent: 3286528 (1966-11-01), Jullien-Davin
patent: 3575054 (1971-04-01), Glista
patent: 3848180 (1974-11-01), Jonke et al.
patent: 4077262 (1978-03-01), Cholet
patent: 4099238 (1978-07-01), Suzuki

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