摘要:
A high frequency target seeking device, using a stabilised reflector antenna (20), performs range search and tracking functions and target angle search and tracking functions. A technique is provided for target range discrimination using several narrow band i.f. filters (81), also thereby improving signal-to-clutter ratio and signal-to-receiver noise ratio. Target search is accomplished with simultaneous range and antenna azimuth scanning, with the range bins (82) and the antenna beam swept across the target. A multiplexer (83) selects the range bin (82) having signals indicative of the target. Target range tracking is accomplished by the mutliplexer (83) additionally automatically selecting range bins adjacent the range bin of the target and comparing their output signals. Antenna stabilisation is accomplished utilising signals from vehicle pitch, roll, and yaw rate sensors, and antenna elevation and azimuth rate and angle sensors (60-68). These signals are processed in the antenna control circuit according to predetermined relationships to provide the desired antenna stabilisation.
摘要:
In one aspect, the present application describes an apparatus for a radar system. The apparatus may include a vehicle with four radar units mounted on it. Each radar unit may be configured with a half-power scanning beamwidth and a respective broadside direction. The half-power scanning beamwidth of each radar unit may be configured to scan approximately 90 degrees. A first radar unit may have a broadside direction that is approximately 90 degrees from respective broadside directions of a second radar unit and a fourth radar unit. The second radar unit may have a broadside direction that is approximately 90 degrees from respective broadside directions of the first radar unit and a third radar unit. The third radar unit has a broadside direction that is approximately 90 degrees from respective broadside directions of the second radar unit and the fourth radar unit.
摘要:
An angle-only tracking filter includes: a target angle discriminant unit configured to receive sensor signal outputs and form angle only observations of a target relative to an ownship; an ownship navigation filter configured to receive and filter ownship inertial navigation measurements; a model analyzer configured to receive and analyze the ownship inertial navigation measurements and select the order of target kinematics to be determined; and a target kinematics generator coupled to the angle discriminant unit, the navigation filter unit, and the model analyzation unit, including: a first-order filter unit configured to generate a target position from the target angle measurements and the ownship inertial navigation information; a second-order filter unit configured to generate a target velocity from the target angle measurements and the ownship inertial navigation information; and a third-order filter unit configured to generate a target acceleration from the target angle measurements and the ownship inertial navigation information.
摘要:
A scanning method of an in-vehicle scanning-type radar for emitting beams subsequently to execute scanning and for detecting an object includes determining whether or not the object is in an approaching state. When it is determined that the object is not in the approaching state, executed is a first scanning for scanning within a first angle range. When it is determined that the object is in the approaching state, executed is a second scanning for scanning within a second angle range that is narrower than the first angle. A period during which the radar scans the second angle range once in the second scanning is shorter than that during which the radar scans the first angle range once in the first scanning.
摘要:
The invention relates to a method for determining the course of another vehicle (25) in relation to one's own vehicle (23) by measuring the position of the other vehicle in relation to one's own vehicle by means of a transmitter/receiver system, such as a radar system. The method permits course determination both on straight and on bend segments. According to the method, the side location (d) of the other vehicle and one's own vehicle is determined at a position where the other vehicle is level with one's own vehicle, by moving the front vehicle backwards in time and/or moving the rear vehicle forwards in time, on the basis of position measurements of the position of the other vehicle. The side location of the other vehicle is compared with the side lcoation of one's own vehicle, by which means a measure of the discrepancy between the course of the other vehicle and the course of one's own vehicle is obtained. According to the invention, the position where the other vehicle is level with one's own vehicle is determined on the basis of the inertial speed vector of the other vehicle (25) at one or more points in time.
摘要:
In one aspect, the present application describes an apparatus for a radar system. The apparatus may include a vehicle with four radar units mounted on it. Each radar unit may be configured with a half-power scanning beamwidth and a respective broadside direction. The half-power scanning beamwidth of each radar unit may be configured to scan approximately 90 degrees. A first radar unit may have a broadside direction that is approximately 90 degrees from respective broadside directions of a second radar unit and a fourth radar unit. The second radar unit may have a broadside direction that is approximately 90 degrees from respective broadside directions of the first radar unit and a third radar unit. The third radar unit has a broadside direction that is approximately 90 degrees from respective broadside directions of the second radar unit and the fourth radar unit.
摘要:
A consumer electronics terminal for use in a distributed system for flying objects tracking, the terminal comprising: a location determination signal receiver; a controller; a memory; and a data transmitter, the terminal further comprising: the controller being configured to receive data from the location determination signal receiver and to communicate, using the data transmitter information regarding change of signal strength of a given available at least one satellite to at least one server. The invention also concerns a radar facility for flying objects tracking using consumer electronics devices, the radar facility comprising: a database configured to store information received from a plurality of consumer electronics terminals according to the invention; a data processor configured to filter the data stored in the database according to rules stored in a rules database; the data processor being further configured to recognize, based on the filtered data, coherent changes in time denoting a route of a flying object.