Primary flow sensing device

Details Primary flow sensing device Primary flow sensing device

1977-07-18

1979-02-27

Gill, James J.

Measuring and testing

Volume or rate of flow

System

73DIG1, G01F 120

Patent

active

041412460

ABSTRACT:
A primary sensing device, or apparatus, for measuring energy level changes, or variations, in a medium capable of transmitting energy. An elongated reed, the ends of which are tensioned upon suitable support means, is acted upon by the energy level changes, or variations, within the medium and energy is absorbed by the reed which causes the latter to resonate in a harmonic mode to produce nodes and antinodes in known relation to the amount of energy transmitted thereto by the medium and absorbed by said reed. An output signal, suitably as produced by one or a plurality of strain gauges, is taken off from the resonating reed, and interpreted via suitable read-out means as an intelligible signal indicative of the change in magnitude of the variable property measured within the medium.
A preferred primary sensing device is one wherein a plurality of strain gauges are located upon said elongated reed, spaced apart and substantially equidistant one gauge from another, and leads are associated with each of said strain gauges for providing an electrical input, and voltage output which is proportional to the magnitude of the wave energy transmitted to said elongated reed, and to the magnitude of the change which occurs in said medium.

REFERENCES:
patent: 1789192 (1931-01-01), Richards
patent: 2063944 (1936-12-01), Pierce
patent: 2809520 (1957-10-01), Richard
patent: 3878716 (1975-04-01), Asada

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