摘要:
The current invention relates to a pivot linkage device (20) comprising at least one rolling bearing (21) comprising at least one inner cage (213), one outer cage (211) and a plurality of rolling elements denoted as the bearing components, the device (20) further comprising means for protection against high voltage transients, characterized in that said protection means are exclusively formed by said bearing components, said bearing components being loaded by loading means arranged in such a manner that a direct electrical connection exists between these components.
摘要:
There is disclosed a method for determining the impact point of a projectile fired at a target (15) tracked by use of a radar antenna (11), the method being characterized in that it comprises at least a step of measuring the range and bearing of the projectile based upon the use of said radar antenna (11), a step of Doppler filtering distinguishing the projectile measurements from the tracked target (15) and sea clutter measurements, and a step of determining the projectile trajectory (131) from a plurality of range and bearing measurements performed at successive instants of time (t i ), and a step of determining the impact point of the determined projectile based upon the projectile trajectory (131). The current invention can be applied to splash spot location prediction and miss distance indication.
摘要:
There is disclosed a broadband HF antenna, which is fully integrated on a naval ship. This antenna enables to transmit and/or receive radio-frequency waves from a naval ship. The antenna comprises a radiating element and an exciting element. The exciting element excites the radiating element when fed with current. The radiating element is a structural element of the ship itself. Application : shipbuilding, naval antennas
摘要:
This invention relates to a method and the corresponding device for the reduction of the influence of the multipath effect on the own position measurement of a beam guided object and the RF beam guided object control means using it. In guided ammunition control, the use of RF beam guidance induces that the own position measurements of the guided ammunition with respect to the guidance beam are affected by multipath effects in the case of low flying targets. An object of this invention is a method for the reduction of the multipath effect on the own position measurement of a beam guided object comprising the limitation of the variation of the measured position into a predetermined interval [F2, F1].
摘要:
The invention is directed at a system and method to accomplish Maritime Protection missions. The system comprises a number of nodes equipped with Boxes comprising at least two sensors, a positioning module, a processing module and a communication module. The Boxes may be positioned on moving or fixed platforms, such as the HVUs themselves, navy ships, USVs or spar-type buoys. The system relies on LOS and NLOS communication links and implements a publish/subscribe paradigm on a network the topology of which may be automatically reconfigured while the nodes are moving. The nodes may be organised in a hierarchical structure of groups of nodes. The system is capable of running cooperative intention detection processes to compute the likelihood of a threat. One of the key advantages of the invention is to provide cost-efficient distributed observation systems which deliver early warning thus allowing for a reduced number of response platforms.
摘要:
There is disclosed a surveillance system for detecting targets. The system comprises a radar antenna mounted on a blade of a windmill. Application : surveillance systems
摘要:
There is disclosed a method for estimating the position and the speed of a target with a radar. The radar emits a waveform comprising a train of pulses, each pulse comprising an OFDM chip constructed from subcarriers, the subcarriers covering the whole bandwidth of the radar. Upon receipt of the echoed pulses, some of the subcarriers are used in a step of Doppler processing, each of said subcarriers being fixed over the pulses. Upon receipt of the echoed pulses, other subcarriers, that are not used for Doppler processing, are used in a step of High Range Resolution processing, the said subcarriers being randomly distributed over the pulses. Application : detection