Eads Deutschland Gmbh

Ralf Voss

Josef Schalk

Karin Bauer

Helmut Seidel

Erwin Stenzel

Rainer Freitag

Ulrich Prechtel

Winfried Kupke

Stefan Sassen

Konrad Lentner

Matthias Aikele

Tanjo Gleissner

Roland Hilser

Matthias Rose

A micromechanical rotation speed sensor with a gimbals-mounted structure capable of vibration includes two vibration elements () which are swivelled about two axes (A, B) oriented perpendicular toward each other. An excitation unit in the form of an electrode () sets the first vibration element () into a vibration about the first axis of rotation (A). A read out unit in the form of a read out electrode () records a tipping or vibration of the second vibration element () about the second axis of rotation (B) as a measure for the rotation speed of the sensor. Additional mass elements () which are symmetrically aligned are situated on the upper side () and the underside () of the first vibration element () which form a rocker. The sensor is manufactured of at least three individually processed wafers which are finally joined together and form a top part (), a midsection () and a bottom part ().

Micromechanical speed sensor

A self-testing sensor (especially to measure an angular rate or acceleration) includes a resonant structure, an actor unit configured to excite the structure to a first periodic vibration, a piezoresistive element configured to generate an output signal that depends on the measured quantity, and an isolator configured to isolate a test signal component from the output signal, whereby the test signal component is generated by a second periodic vibration of the structure superposed on the first vibration. A device for self-testing a sensor includes an isolator configured to isolate a test signal component superposed on a useful signal component from the periodic output signal of the sensor, and it includes a comparator configured to compare the test signal component with a predefined value or a test signal fed to the sensor. For the self-test, a second periodic vibration is superposed on a first vibration of the structure, and an output signal containing information on the measured quantity is determined. A test signal component contained in the output signal is monitored.

Sensor having a resonance structure, especially an acceleration or rotation rate sensor, and a device for carrying out a self-test

A rate of rotation sensor is suggested which is structured out of silicon (silicon compounds or silicon/glass compounds) or other semiconductor materials by means of micromechanical techniques. The rate of rotation sensor has the form of a tuning fork whose prongs are situated in planes in parallel to the surface of the semiconductor wafer. These prongs are exited to carry out vibrations in a plane perpendicular to the wafer plane. By means of a sensor element which registers the torsion of the tuning fork suspension, the angular velocity of a rotation of the sensor about an axis in parallel to the tuning fork suspension is measured.

Micromechanical rate of rotation sensor (DRS)

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West Bloomfield, MI, United States of America

Ralf Voss