Fluid flowmeter having an optical fiber sensing element

Details Fluid flowmeter having an optical fiber sensing element Fluid flowmeter having an optical fiber sensing element

1980-03-04

1981-12-29

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

7386174, G01F 132, G01F 128

Patent

active

043076181

ABSTRACT:
An inexpensive, non-obtrusive optical flowmeter is disclosed comprising at least one flexible, light transmitting optical fiber rod having an enlarged (e.g. spherical) terminus formed at a fluid responsive end thereof. The flexible optical fiber is inserted into a fluid channel in such a manner that the enlarged terminus oscillates at a frequency that is a function of the rate of fluid flow. The intensity and frequency of an optical signal being transmitted via the optical fiber to an optical detector are related to the rate at which fluid flows through the channel. By detecting the intensity and frequency of the optical signal at different times for corresponding rates of fluid flow, an accurate (digital) representation of a particular rate of fluid flow can be obtained.

REFERENCES:
patent: 1215135 (1917-02-01), Fischer
patent: 1935445 (1933-11-01), Heinz
patent: 3213197 (1965-10-01), Hawkins
patent: 3224279 (1965-12-01), Galli et al.
patent: 3602037 (1971-08-01), Neu
patent: 4171643 (1979-10-01), Frick
patent: 4206642 (1980-06-01), Bearcroft

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