Asea Aktiebolag

Asea Brown Bovert Ab

Bertil Hoffman

Jarl R Sobel

Jan O Nordvall

Orvar Dahle

Sture Siby

Ake Widehn

Sverker Nidmark

Jan Palmquist

The content of even harmonics is used in both a method and apparatus for the detection of the disturbing static and quasi-static magnetic fields effects in measurement systems using force and torque transducers operating with magnetoelastic effect. The even harmonic content corresponds to the degree of static and/or quasi-static magnetization and is an input signal to a regulator the aid of the direct current in, for example, a separate winding, reduces the static and/or quasi-static magnetization to zero.

Detection of static and/or quasi-static magnetic fields in

A pressure-sensing transducer which can be used to continuously measure the pressure in the cylinder of an internal combustion engine comprising a pressure-transmitting element which includes a generally tubular seat and a metallic plate which closes off a top end of the seat, an M-shaped force-transmitting member which spans across the top end of the seat, the outer legs of the M-shaped member being connected to opposite portions of the top end of the seat and the inner legs being connected to the center of the metallic plate, and a magnetoelastic force-sensing member connected between the outer legs of the M-shaped member, such that pressure-generated forces applied to the metallic plate from within the generally tubular seat are transformed into a tensile force acting on the force-sensing member in a direction perpendicular to the longitudinal axis through the generally tubular seat.

Pressure-sensing transducer

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Kolback, Sweden

Bertil Hoffman