摘要:
The invention relates to 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.
摘要:
Examples relating to vehicle radar systems are described. An example radar system may include a radar transmission unit located on a top portion of a vehicle configured to transmit an omnidirectional radar signal. The system may also include a radar unit comprising a plurality of radar reception arrays. The radar unit may be configured to rotate around an axis and receive radar reflections by one or more of the radar reception arrays. Additionally, the system may include a processing unit. The processing unit may be configured to process the received radar reflections to determine reflection information and control the vehicle based on the determined reflection information.
摘要:
According to one embodiment, an antenna device comprises an antenna panel including a first transmission antenna, a first reception antenna, and a second reception antenna, and a rotation device configured to rotate the antenna panel. A first radio wave is irradiated from the first transmission antenna when a rotation angle of the antenna panel is a first angle and a reflected radio wave of the first radio wave is received by the first reception antenna and the second reception antenna. A second radio wave is irradiated from the first transmission antenna when the rotation angle is a second angle and a reflected radio wave of the second radio wave is received by the first reception antenna and the second reception antenna.
摘要:
A SYSTEM FOR DETECTING AND VISUALIZING TARGETS BY AIRBORNE RADAR, comprising a plurality of N antennae with a narrow beam in elevation and wide in azimuth, regularly disposed on a rotary base coupled to an engine, the elevation orientations of said antennae being staggered according to a defined pattern, each antenna being associated to a radar device endowed with computer means furnishing information relating to distance, azimuth, elevation and speed of fixed and moving obstacles above and below the plane of said rotary base. Some antennae point towards a place above the horizon, the angles of view being progressively descending so as to cover a volume that extends above and below the plane of the horizon, and may reach the ground. Said volume results from the sum of the volumes of superimposed cones, each cone corresponding to an elevation angle. The system combines the images of the N conical volumes to provide the pilot or operator a three-dimensional image.
摘要:
Embodiments of the invention are directed to a method of determining underground liquid content (e.g., water, sewage, etc.). Embodiments may include: receiving, from a radiofrequency radiation sensor, a main scan of an area, the main scan may include reflections from the area at RF range, and receiving typical roughness values of one or more types of water sources. Embodiments may further include: filtering from the main scan undesired water source types according to their typical roughness values, identifying a desired type of water source in the filtered main scan and receiving from the RF radiation sensor a set of scans of the area, each scan of the area includes reflections in the RF range taken prior to the receiving of the main scan. Embodiments may include calculating the underground water content at locations in the area based on the identified first type of water source and the received set of scans.
摘要:
Multiple radio transmissions are processed to determine, for each of a number of directions of arrival of the radio transmissions, a most direct direction of arrival, for example, to distinguish a direct path from a reflected path from the target. In some examples, the radio transmissions include multiple frequency components, and channel characteristics at different frequencies are compared to determine the direct path.
摘要:
Synthetic aperture radar apparatus and methods provide for a compact and usable system to scan behind and underneath surfaces. A synthetic aperture radar pod can be portable and self contained for low cost and ease of transportation. The synthetic aperture radar system may be used at close range to the target area without a fixed and predetermined scan pattern and still provide usable three dimensional images of a surface and/or what is behind or beneath the surface. In some embodiments, the synthetic aperture radar apparatus may be used with common vehicles not dedicated to scanning to provide a useful three dimensional image.
摘要:
Methods and apparatus for providing a first radar system having a transmitter and a receiver and a reflector to provide a synthetic aperture radar relationship. The signal return is processed to generate an image of targets in the area.