Measuring and testing – With fluid pressure – Dimension – shape – or size
Patent
1998-06-03
1999-06-29
Williams, Hezron
Measuring and testing
With fluid pressure
Dimension, shape, or size
73 1208, G01M 302
Patent
active
059182652
ABSTRACT:
This device (1) produces a steep-fronted liquid pressure wave which strikes a body (12) to be tested with an adjustable table pressure. The device has a measuring tube (10) within or to which the body (12) is fixed, and which has a pressure-proof observation window (13, 14) and a pressure-relief valve (15). A pressure tube (20) with a compression system (25) which compresses a gas is closed on one side by a first diaphragm (29) which forms part of a chamber (27) that is provided with a valve (25). The chamber is closed by a second diaphragm (19) located opposite the diaphragm (29). In tube (10), a piston (18) is movable on guides (17) up to a braking device. To carry out the method, an amount of liquid which only partially fills the tube (10) is applied to the pistons In the chamber (27), a pressure equal to half the bursting strength of the diaphragms (29, 19) is set. The pressure in the tube (20) is increased until the bursting strength is exceeded. Then the pressure in the chamber (27) is reduced to ambient pressure, thereby causing the two diaphragms (29, 29) to burst and the piston (18) with the liquid ahead of it to be accelerated toward the body (12). The piston (18) is stopped by the braking device (19), while the liquid strikes the body (12). The hydrodynamic behavior of the body is registered through the observation window (13, 14) by an optical measurement of short-time processes or by means a sensor associated therewith.
Maul Joachim
Oertel Herbert
Ohle Frank
Endress & Hauser Flowtec AG
Tran Thuy Vinh
Williams Hezron
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