Abstract: An air-to-surface surveillance and/or weapons system includes a base aircraft and an unmanned slave aircraft that can be uncoupled from a base aircraft and coupled back to it again. The base aircraft and slave aircraft are equipped with coupling equipment designed to work together. The base aircraft is equipped with surveillance and monitoring equipment. The slave aircraft is equipped with monitoring equipment and/or weapons. The slave aircraft can be connected to a control station via a data link for data exchange and can be controlled from this control station.

Abstract: A device for the regeneration of a biosensor having an immobilized and biologically active material applied to the surface of a carrier that is suitable for interacting with a substance to be analyzed. The device comprises at least one injector through which, by means of a pump, at least one solution can be applied to the surface of the carrier for the purposes of rinsing the biologically active material.

Abstract: A method for manufacturing a component having increased thermal conductivity through layer-by-layer construction. At least one section of the component is constructed by applying a layer section having predetermined dimensions of a composite material of a metal and/or a metal alloy and particles of a highly heat-conducting material, including diamond and/or cubic boron nitride, in a predetermined area on a base layer by melting the metal or the metal alloy a heat source, in such a way that the metal and/or metal alloy form(s) within the predetermined dimensions a cohesive matrix, in which particles of the highly heat-conducting material are embedded, and then cooling.

Abstract: A communication system includes a first wireless communication device for providing communication access for a mobile computer device in a first communication area. The first wireless communication device comprises an access control system for granting access based on authentication information known by the mobile computer device. A second communication device provides the authentication information for the mobile computer device. Furthermore, the invention relates to a method for granting access, executable by the communication system mentioned above, as well as to a maintenance system and/or an aircraft having such communication system.

Abstract: A corrosion detection apparatus for permanently and integrally monitoring a state of corrosion of a component is provided. The corrosion detection apparatus makes it possible to use the change in electrical conductivity to detect corrosion of a component to be monitored. A corrosion-sensitive bridging element that establishes an electrical connection between a first electrical line section and a second electrical line section of a sensor circuit is used to change certain electrical properties of the sensor circuit. On account of the corrosion-sensitive property of the bridging element, the latter changes its electrical conductivity when corrosion starts. This makes it possible to use the sensor circuit to detect corrosion of the bridging element and thus of the component to be monitored.

Abstract: A process and a system for creating internal stress in a metallic workpiece by laser shock peening is provided. In the process, a first laser pulse is applied to a treatment site of the workpiece covered by a surface layer. A second laser pulse follows the first laser pulse in time, and is applied to the treatment site of the workpiece. A covering layer, such as flowing water, is provided over the treatment site during the application of the laser pulses.

Abstract: A limiting circuit has a signal input and a signal output for limiting an output signal that is present at the signal output and that can be fed to a further circuit connected to the output of the limiting circuit. A voltage connection for feeding a bias voltage and a transistor are present, wherein the gate connection of the transistor is connected to the voltage connection by means of a first matching circuit and to the signal input by means of a second matching circuit.

Abstract: A shock isolation structure for mounting a radar system to a supporting surface on board of a vessel includes a platform on which the radar system can be attached, six strut-like damping elements operating in both tension and compression between the platform and the supporting surface. The damping elements are oriented in a truss configuration with first ends of the damping elements connected to the supporting surface for universal movement and with second ends of the damping elements connected to the platform for universal movement. Each of the damping elements includes a magnetorheological or electrorheological fluid damper.

Abstract: A rotor blade for a wind turbine includes a casing structure made of flat fiber composite material that forms the rotor blade surface. To reduce interferences to radar systems caused by the use of the rotor blade, at least at the leading edge and the trailing edge of the rotor blade is provided with a fiber composite material is designed for providing a frequency-dependent radar reflection factor for radar radiation that is incident perpendicular to the surface and which has a reflection minimum at a given frequency in the range of 1 GHz to 10 GHz.

Abstract: A system and method for determining the pH value of a liquid. The system and method excite the liquid molecules in the liquid by light with a predetermined wavelength and an intensity component, transmitted through the liquid in a predetermined wavelength range, of the light used for excitation is captured. This intensity component is used to produce a wavelength/intensity absorption characteristic and this absorption characteristic is related to a reference absorption characteristic associated with a specific pH value of the liquid. The system and method thus can be used to obtain drinking water from a fuel for aircraft.

Abstract: A device for the radiometric calibration of infra-red measuring devices is provided. The device is in the form of a heated metal surface that is used as a radiant surface and is coated with a high-emission material. The device includes a spherical segment, the interior of which is coated with the high-emission material and the opening of the spherical segment is used as an aperture for an infra-red device that can be arranged in the center of the aperture.

Abstract: A monitoring device for a repair patch that can be placed on or in a wall of an aircraft to repair a defect has a sensor device for detecting properties of the repair patch placed in the wall, an energy supply device for supplying energy at least to the sensor device, and a communication device so as to read out the sensor data. A repair kit that can be placed in or on a wall of an aircraft to repair defects comprises a repair patch for repairing a defect in or on a wall of an aircraft and also comprises a monitoring device. A method for monitoring a repair patch in or on a wall of an aircraft by means of a monitoring device comprises the steps of detecting a measurement phase on the basis of the amount of energy provided by the energy supply device, measuring load parameters in and/or on the repair patch during the measurement phase, and reading out the load parameters.

Abstract: A method for simulating the movement behavior of a fluid in a closed moving container is provided. The simulation is based on the determination of the potential movement path of the center of gravity of the volume of the fluid as an elliptical trajectory situated in a disturbance plane having certain semi-axes.

Abstract: An unmanned aircraft, unmanned aviation system and method for collision avoidance during the flight operation of an unmanned aircraft are provided. The unmanned aircraft includes a lift and propulsion system and a flight control system having a flight control unit, a navigation system and an actuator system. The flight control unit has an autopilot unit. The flight control unit calculates control commands using data from the navigation system and/or the autopilot unit, which can be conveyed to the actuator system for actuating the lift and propulsion system. A collision warning system is connected with the flight control system, the collision warning system detects a collision situation and makes collision avoidance data available. A connection between the collision warning system and the autopilot unit is provided, in order to initiate an obstacle avoidance maneuver by the autopilot unit with the help of the collision avoidance data.

Abstract: A device for the detection of micro particles that can be marked by probes or antibodies capable of being detected by radiation has a filter, a supply system, and a detection system. Fluid to be examined is passed over a filter to filter out the micro particles and to perform the marking steps by supplying corresponding marking substances to the filter.

Abstract: A mechanical particle filter comprises a membrane having a plurality of pores. At least one partial region of the surface of the membrane, that is accessible for the medium to be filtered, includes a carbon material having a diamond structure.

Abstract: Techniques for the detection of moving objects in a video image sequence are provided. Distinctive image variation points in a difference image are determined. An image variation threshold value is established and image variation points are determined as those points in the difference image in which the absolute image brightness value of which exceeds the image variation threshold value. The quality of the image variation points are determined based on at least one predetermined quality criterion. If the quality criterion is met, the determined image variation points determined are determined as the distinctive image variation points determined. Otherwise, the establishment of an image variation threshold value and determination of the quality of image variation points is repeated with a changed image variation threshold value.

Abstract: A foldable log-periodic antenna includes a feed line, one or more transmitting elements for transmitting and/or receiving electromagnetic signals, one or more supporting elements for holding the transmitting elements, and one or more elements for producing a tensile stress on the transmitting elements. One of the a transmitting elements is connected to one of the supporting elements and to the feed line, and with one supporting element is connected to the feed line via an articulated joint apparatus, such that the antenna can be moved from a transport position to an operating position and vice versa. The one or more elements for producing a tensile stress on the transmitting elements is a flexible tube, and can have an internal pressure applied to them and are connected to the supporting elements for holding the transmitting elements.

Abstract: The rotors of a helicopter are directly connected with electric high-torque motors, and are powered by the latter. Energy generation and rotor drive are separate from each other. The high-torque motor of the main rotor is pivoted to the cabin canopy, so that it can be tilted together with the main rotor.

Abstract: A load introducing element for a control surface of an aircraft or a spacecraft comprises at least one first component, one second component and one first flange. At least one surface area of the first component is adapted to conform to the inner contour of the control surface. The second component has at least one eye for receiving bearing means for mounting the control surface. A cross sectional profile of the first component has two or more essentially straight legs, which are connected together on their upper side by an upper edge which is adapted to an upper contour of the control surface. The load introducing element is formed by a fiber reinforced composite material having an integral type of construction in which all of the components are jointly infiltrated and cured. The invention also provides a method for producing such a load introducing element, a drive armature and an aircraft that includes such a load bearing element.