Eads Deutschland Gmbh

Daimler-benz Aerospace Ag

Deutsche Aerospace Ag

Messerschmitt-bolkow-blohm Gmbh

Astrium Gmbh

Helmut Klausing

Horst Kaltschmidt

Aribert P Wolframm

Wolfgang Kreitmair-Steck

Aribert Wolframm

Guenter Braun

Heinrich Dämbkes

A system is for recognizing obstructions and monitoring movements on or above an airport area () with sensors (). A sensor () is a radar device having a plurality of antenna elements (), which are affixed to a curved surface () of an antenna carrier () and are turned on, one after the other, in terms of time. Thus a first part of the antenna elements () is disposed on a first circular line () on the surface of the antenna carrier (), and a second part of the antenna elements () is disposed on a circular line () perpendicular to the first circular line (). Therefore the data of the radar device () are evaluated in a first ROSAR process, to image the situation on the ground, and in a second ROSAR process, to image the heights of the flying objects to be observed.

System for monitoring airport area

A radar system for active obstacle warning and imaging of the surface of the earth, working in the pulse frequency or FH-CW range, which can be used in on-line operation in real time, includes a plurality of antenna elements for sending and receiving radar signals, which are arranged on the fuselage of an aircraft, and which may be turned on and scanned sequentially, whereby a synthetic aperture can be generated by means of periodic sending and receiving of the antenna elements. Antenna elements are arranged along the curved surface of the aircraft contour, whereby a SAR processor is present, which analyzes the data obtained from the antenna elements and displays them as processed radar images on board the aircraft, in a virtual cockpit.

Radar system for obstacle warning and imaging of the surface of the earth

It is proposed in connection with a method for the interferometric radar measurement in conjunction with a helicopter operating in accordance with the ROSAR principle (Heli-Radar) that two coherent receiving antennas with receiving channels are associated with a transmitter of the ROSAR-system mounted on the revolving rotary cross; and that the difference (&#x394;R) between the two distances (R+&#x394;R, R) from the measured impact point P are calculated, in the manner known per se, based on the wavelength &#x3bb; of the emitted radar signal and the measured phase difference of the receiving echo of the two coherent receive channels.

Method for interferometric radar measurement

A method for recognizing and identifying objects by means of several sensors, particularly using imaging sensors (L, W, V) in the infrared and/or visible wavelength range and radar devices (R) which are based on the generation of a synthetic aperture. According to the invention, generation of the synthetic aperture occurs in accordance with the ROSAR principle, wherein a plurality of antenna elements (A), which the radar device (R) comprises, is placed on the aircraft (F) along its arched contour (K), controlled sequentially and scanned, and wherein the information acquired by the radar devices (R) and the imaging sensors (L, W, V) is subsequently processed, in such a way that optimal imaging of the surroundings of the aircraft (F) is made possible in every viewing direction.

Method for recognizing and identifying objects

The invention relates to a telematics method for helicopters. According to the inventive method, the use spectrum of helicopters which are provided with all-weather flight guidance and obstacle warning systems is enlarged and flight security is further improved by transmitting data and/or speech by means of terrestrial and/or satellite-supported mobile radio telecommunications networks and by connecting to a locating system. Logistics processes of the helicopter operation and of the institutions benefiting from a helicopter use are optimized.

Telematics process for helicopters

In a system for supplying power to ROSAR transmitting and receiving antennas that are integrated into the tip of a helicopter rotor blade, wind energy is converted directly into electrical energy locally at the rotor blade tip.

System for supplying power to ROSAR transponders, including transmitting and receiving antennas for ROSAR devices

A ROSAR wire detection method is based upon ROSAR focusing of entire segments of wire. By generating a wire reference signal comprised of a sum of coherent reference signals, the basis for reliable wire detectability is provided.

Method for detecting wires using the ROSAR system

In conjunction with an arrangement for the interferometric radar measurement in connection with a radar system operating according to the ROSAR principle, comprising one coherent transmitting antenna and two coherent receiving antennas and their receiving channels, in connection with which the difference in the path between the two distances of the antennas and the measured points of impact is calculated by the wavelength &lgr; of the emitted radar signal and the measured phase difference of the receiving echo of the two coherent receiving channels, it is proposed that the interferometric ROSAR system is integrated in or on a rotating device and positioned in such a way that each relevant area of the field to be measured can be detected.

Arrangement for the interferometric radar measurement according to the rosar principle

In a method for operating a rotating synthetic aperture radar system that works with pulse frequency or in FM-CW operation in order to detect, penetrate and evaluate objects that are located vertically below the helicopter carrying the ROSAR device, pixels are determined using their own specific doppler histories.

Rosar method for landing helicopters under adverse weather conditions and for recognizing and detecting concealed targets

A method of signal conditioning and processing uses a ROSAR system for obtaining high-resolution elevation data using a fixed transmitting antenna, without requiring a turnstile. A telescope-like extensible transmitting antenna having large vertical dimensions illuminates an area to be imaged in a fanned pattern, creating overlapping elevation sectors. Reflected signals are relayed to a fixed receiving antenna via rotating transponders.

Method of signal treatment and processing using the ROSAR system

The present invention pertains to a device for motion compensation for a radar with synthetic aperture based on rotating antennas (ROSAR) for helicopters, with which the flight guidance of the helicopter is made possible according to a radar image on a ROSAR basis, because this device substantially improves the quality of this radar image.

Device for motion error compensation for a radar with synthetic aperture

The invention relates to an all weather visual system that combines information from a ROSAR type radar sensor with navigation and flight information to provide artificial vision for the pilot. The radar utilizes the movements of rotating arms fixedly mounted on the rotor head of a helicopter. For this purpose, a turnstile is used as the central carrier structure, which is protected by an aerodynamically shaped body against atmospheric forces. The radar transmitter and radar receiver are located on the rotor head and in the tips of the rotating arms, respectively.

All weather visual system for helicopters

The present invention pertains to a radar device with synthetic aperture based on rotating antennae (ROSAR principle), preferably for helicopters, which operates in the millimeter-wave range and is used mainly as an obstacle radar, wherein the full synthetic aperture length can be reached already within very short distances due to the arrangement of the antennae on a turnstile. Exemplary embodiments, calculations and representations are shown and explained.

Radar device for obstacle warning

In the case of a ROSAR-device, a comparator module in which imaging defects are determined is provided for increasing and estimating the resolution precision in the processor circuit. This comparator module acts upon a further module for correcting the range curvature deviation so that imaging defects will be corrected.

Radar device comprising a synthetic aperture on the basis of rotating

In a rotating antenna synthetic aperture radar, a method and apparatus for unfocussed signal processing for the correlation of the received signals by means of the reference functions. In unfocussed signal processing, only the main portion of the receiving signal S.sub.E is used, in which the phase shift is smaller than or equal to 90.degree. for the go-and return-path of the signal. A simplified window function is used as a reference function whose width also corresponds to the main portion of the received signal. Preferably, the in-phase and quadrature component (I.sub.r, Q.sub.r) of the window function r are selected to be identical.

Growing community of inventors

Wessling-Hochstadt, Germany

Helmut Klausing