Measuring and testing – Fluid pressure gauge – Diaphragm
Patent
1980-08-29
1982-07-20
Gill, James J.
Measuring and testing
Fluid pressure gauge
Diaphragm
336 30, G01L 910
Patent
active
043399568
ABSTRACT:
A pressure sensor comprising a pressure-stress conversion mechanism including a movable body which is driven by a hydraulic pressure to be determined; a spring means which urges the movable body in a direction to oppose the pressure applied; a stress-pulse phase conversion unit connected to the movable body for producing a stress in accordance with the magnitude of the pressure in response to a load applied by the movable body and including a member of an amorphous, magnetically soft metal material having an electrical coil disposed thereon. A pulse voltage is applied to one end of the electrical coil, the other end of which is connected in series with a resistor in order to detect a voltage drop across the latter. The time delay of the voltage drop with respect to the pulse voltage, which depends on the magnitude of the hydraulic pressure, is indicated in the form of an analog voltage or a digital code.
REFERENCES:
patent: 3168830 (1965-02-01), Chass
patent: 3807223 (1974-04-01), Juillerat et al.
patent: 4042899 (1977-08-01), Tomczak et al.
patent: 4170498 (1979-10-01), Jost et al.
patent: 4226126 (1980-10-01), Herden
"Force and Displacement Transducers . . . " by Mohri et al. from Electrical Engineering in Japan, vol. 99, No. 2, pp. 105-112, Feb. 1979.
Aisin Seiki Company, Ltd.
Gill James J.
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