Eads Deutschland Gmbh

Daimler-benz Ag

Temic Telefunken Microelectronic Gmbh

Daimler-benz Aerospace Ag

Gerald Sobotta

Helmut Riedel

Thorsteinn Halldorsson

Karl Hofmann

Willi Platz

Dieter Bosch

Michael Hofmann

Willy Platz

In the case of a method of detecting wind velocities by means of a Doppler-lidar system (), a laser beam of a defined frequency generated by means of a laser () is emitted by a transmitting device () toward a space area and the light backscattered from the space area is received by means of a receiving telescope (). For determining a Doppler shift, an interferogram is generated by means of an interferometer (), the intensity distribution of the interferogram being directly measured by means of a photodetector (). The measured intensity distribution is compared with one or more reference patterns which had previously been determined for defined parameters and are filed in a memory device (). From the comparison, the Doppler shift is determined as a measurement for the wind velocity. The Doppler-lidar system () comprises an analyzing unit () for implementing the method, having a comparison unit () for the comparison of reference patterns with the measured interferogram.

Method and apparatus for detecting wind velocities by means of a doppler-lidar system

In a method and apparatus for measuring pressure, sound and vibration, particularly for the flow analysis on missiles or airplanes, a sensor device which is used to sense pressure or sound waves, is linked to a structure of a structural part in order to measure forces acting upon the structural part surface. The sensor device is arranged completely inside the structure of the structural part or on the rear side of the structural part surface. In particular, the sensor device may comprise a piezoelectric foil which is situated under the structural part surface.

Device for measuring pressure, sound and vibration and method of analyzing flow on surfaces of structural parts

An arrangement and method for processing a signal field of sensor signals which originate from the individual sensor elements, for example photodetectors, of a plurality of sensor elements which are regularly spaced in an area and which are each surrounded by six adjacent sensor elements while forming a hexagonal structure. A differential amplifier compares a quantity representing the potential difference and a reference quantity forms a switching quantity (I.sub.Mo) on the output side. A switching comparator, on the input side, receives the switching quantity and, if this switching quantity exceeds the preselectable switching threshold, on the output side emits a switching pulse which causes the 'off' switching condition. Four signal outputs 1, 2, 3, 4 as well as four signal inputs (I.sub.M1 I.sub.M2, I.sub.M3, I.sub.M4) are each connected with a signal input and a signal output of one of the four analog circuits assigned to the four next adjacent switchable resistors, one signal respectively being supplied to the four signal outputs which represents the switching quantity. A switching stage for forming the reference quantity takes into account the signals present at the four signal inputs.

Sensor element array and method for signal or image processing

The invention relates to analog circuits which are constructed as fed-back amplifier networks. The networking is implemented such that the output values of the individual amplifier elements are fed back to the input values of the respective adjacent amplifier elements. The degree of feedback can be statically and dynamically adjusted according to the specific application. Two-dimensional networks with such an architecture can be used, for example, in image processing for the interference reduction under real-time conditions.

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Sauerlach, Germany

Gerald Sobotta