Ultrasonic echo sounding device for observing web formation and

Details Ultrasonic echo sounding device for observing web formation and Ultrasonic echo sounding device for observing web formation and

1984-06-22

1986-03-11

Birmiel, Howard A.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Content or effect of a constituent of a liquid mixture

73 61R, 73629, 73642, 162198, G01N 1100, G01N 2902

Patent

active

045746249

ABSTRACT:
An ultrasonic echo sounding device permits observation of the web formation and/or the pulp suspension flow on the wire part and in the head box of a paper machine. The device includes a series of ultrasonic detectors connected to the wall of the flow channel in the head box and/or to the forming wire. The detectors direct an ultrasonic field at the pulp suspension layer, and the echo signals received from the pulp suspension layer are detected. The detectors operate as acoustic lenses so that the focal points thereof are located in the transverse direction of the pulp suspension flow and in the direction of thickness of the pulp suspension layer in a manner whereby information concerning fibre bundles, air bubbles, variations in consistency, corresponding parameters and their variations in the transverse direction of the pulp suspension flow and in the direction of thickness of the pulp suspension layer are indicated by the device.

REFERENCES:
patent: 3442756 (1969-05-01), Lehtinen
patent: 4381674 (1983-05-01), Abts
patent: 4412451 (1983-11-01), Uusitalo et al.
patent: 4509360 (1985-04-01), Erwin

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