Rheometron Ag

Institut Dr. Friedrich Forster, Prufgeratebau

Institut Dr. Friedrich Forster Prufgeratebau Gmbh & Co Kg

Wolfgang Stumm

Stephen Owen

Herbert Christ

Manfred Hohloch

Mike Kellaway

Walter Steffen

In a Coriolis mass flow gauge, the signal from each sensor is digitized and converted into digital measuring values by one or more analog/digital converters operating with a specific digital sampling frequency. Then, using a microcomputer, each digital measuring value thus obtained is multiplied, on the one hand, with the sine value of the phase angle at the point of sampling of the alternating signal or another scanning signal with the same frequency as the alternating voltage signal, but phase-shifted against that signal and, on the other hand, with the corresponding cosine value. The sine-multiplication values thus obtained are summed over a predetermined time interval to form one Cartesian coordinate of a corresponding sum vector, whereas the cosine multiplication values thus obtained are summed over that time interval to form the other Cartesian coordinate of the sum vector, and from the Cartesian coordinates of the sum vectors of both lateral sensors, the measuring value describing the mass flow through the loop is calculated directly.

Mass flow gauge for flowing media with devices for determination of the

A mass flow meter for flowing media with equipment for determining the coriolis force consists of a helicoidally bent measuring tube provided with two tube loops whose inflow and outflow ends are fastened to a massive cast block and between whose oppositely pivotable tube loops are arranged an oscillator and two sensors measuring the torsional oscillations. For a more compact stiffening and an improved clamping of the measuring tube at the cast block, the two tube loops are in each case ovally bent in one plane, extend approximately parallel to one another and are provided on one longitudinal side in each case with two tube sections lying opposite to one another in an alignment line (x.sub.1 --x.sub.1 or x.sub.2 --x.sub.2). Of these sections, two are crosswise connected through a central tube part extending between the two loops and the two other tube sections are joined to the tube inflow and outflow ends which extend in opposite directions in a curved shape between the two tube loops and which run coaxially to the longitudinal sides to the outside. The tube loops are clamped and welded to the cast block in the area of these four tube sections.

Mass flow meter with equipment for determination of the coriolis force

Method and apparatus for scanning an object with a probe in which scanning lines for the forward and backward motions run parallel to each other and their mutual spacing from each other remains constant. In one form, the object transportation speed Vt is set relative to the speed Va of the forward and backward motions in such a way that Vt/Va=tangent .alpha.=constant where .alpha. is of the angle between the line of reciprocating movement and a normal to the transportation direction. According to another feature, the angle may be controlled by Vt such that parallelism of the scanning lines is maintained.

Method and apparatus for scanning the surface of an object

Method and apparatus for magnetographic testing of magnetizable test pieces including pressing a magnetic storage tape upon the test piece, magnetizing the test piece thereof while the tape is being pressed against the test piece surface, removing the tape and scanning the tape by means of a probe which responds to magnetic forces to detect any stored defect stray fluxes.

Growing community of inventors

Reutlingen, Germany

Wolfgang Stumm