Cross correlation flowmeter

Details Cross correlation flowmeter Cross correlation flowmeter

1987-05-14

1989-06-27

Levy, Stewart J.

Measuring and testing

Volume or rate of flow

By measuring transit time of tracer or tag

G01F 1712

Patent

active

048417807

ABSTRACT:
A cross correlation flowmeter for measuring a flow rate of a fluid comprises a conduit through which the fluid to be measured the flow rate is flowing, first and second upstream sensors disposed on the conduit along a longitudinal direction thereof for sensing passage of the disturbance, a plurality of downstream sensors disposed on the conduit along the longitudinal direction of the conduit at a downstream side relative to the first and second upstream sensors for sensing the passage of the disturbance, first flow velocity detecting circuit for detecting a first flow velocity by calculating a maximum of a cross correlation of output signals from the first and second sensors, selecting circuit for selecting one of the downstream sensors providing a maximum accuracy of the flow rate responsive to the first flow velocity, and flow rate calcualting circuit for calculating the flow rate by finding out a maximum of the cross correlation of output signals from the first upstream sensor and the selected one of the downstream sensor.

REFERENCES:
patent: 4019038 (1977-04-01), Critten et al.
patent: 4248085 (1981-02-01), Coulthard
patent: 4598593 (1986-07-01), Sheen et al.
patent: 4604904 (1986-08-01), Massen
R. S. Madlock Brown Boveri, 311-318.

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