G - Physics – 01 – B
Patent
G - Physics
01
B
349/41
G01B 17/02 (2006.01)
Patent
CA 1321825
TITLE OF THE INVENTION PROCESS AND DEVICE FOR THE ULTRASONIC MEASUREMENT OF THE WALL THICKNESS OF A PART OF SYNTHETIC PLASTICS MATERIAL ABSTRACT OF THE DISCLOSURE Measurement of the thickness of a synthetics plastics layer is effected at a point between an extruder and a cooling trough where the object to be measured is freestanding. Two diametrically opposite ultrasonic measuring heads are given an oscillating rotary movement through 180° about the object to be measured. The measuring heads comprise an ultrasonic source in a measurement chamber opening towards the object to be measured which chamber is continuously supplied with water via a flexible conduit so that a water column is formed between the ultrasonic source and the object to be measured. As a result of this arrangement the wall thickness of the synthetic plastics layer leaving the extruder can be measured at a position where this synthetic plastics layer still has a high, uniform temperature and thus there is within the layer a uniformly definable velocity of sound. As a result of full electronic detection and evaluation of the measurement values according to a multiplex system, a rapid measurement with a high density of points of measurement is possible.
580442
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Zumbach Electronic Ag
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