Patent application number | Description | Published |
20120242543 | MULTI-CHANNEL RECEPTION SYSTEM - A reception system including a receiver coupled to a processing means, the receiver comprising a number N of antennas, each being able to pick up signals representative of incident waves and to deliver a pulse dependent on said signal, N being an integer. Said receiver includes: N delay lines respectively coupled to each of said N antennas, each delay line being able to delay the signal delivered by the antenna with which it is associated by its own time delay, a coupling means able to sum the N signals delivered by the N delay lines, so as to deliver an output signal comprising a series of N time-shifted pulses. The processing means includes a measurement means able to measure the signal delivered by the coupling means and to deliver as output a signal formed by measurement samples, representative of the N pulses delivered by the N antennas. | 09-27-2012 |
20120281689 | MULTI-CHANNEL RECEPTION SYSTEM INCLUDING A SUPERHETERODYNE-TYPE RECEIVER ASSOCIATED WITH SPECTRAL ANALYSERS WITH INSTANTANEOUS BANDWIDTH - A reception system including a receiver of superheterodyne type coupled to a processing means, the receiver including N antennas. Said receiver includes: N translation means, each being able to frequency translate signals delivered by the antenna considered, from a frequency sub-band of the span of interest to a restricted frequency band, and to frequency multiplex the signals belonging to said frequency sub-band; N first intermediate frequency bandpass filters, of bandwidth equal to said restricted frequency band, respectively coupled at the output of each translation means, and able to filter the translated and multiplexed signals; a coupling means able to sum the N filtered signals so as to deliver the set of summed signals via N outputs. The processing means includes N other translation means coupled to N other intermediate frequency bandpass filters of frequency bandwidth equal to L, themselves coupled to N spectral analyzers, all having the same restricted analysis frequency band of width L, each other translation means of rank i, i being an integer varying from 1 to N, being able to transpose the signals delivered by the coupling means with the aid of a translation signal having a frequency adapted to each other translation means, in such a way that the other intermediate frequency bandpass filter connected at the output of said other translation means, is able to filter the ith sub-band of the total frequency band of width L·N, to which the signals summed by the coupling means belong. | 11-08-2012 |
20130315287 | DEVICE FOR BROADBAND RECEPTION BY AUTOTRANSPOSITION AND APPLICATION TO THE DETECTION AND CHARACTERIZATION OF RADIOELECTRIC EMISSIONS - Use of an antennal base formed of two antennas which pick up the emissions present and produce two radioelectric signals S1 and S2. These two signals are used to produce at least one intermediate-frequency signal Fl by demodulation of one of the two signals by the other (autotransposition). The demodulation is carried out by firstly transposing one of the signals, S1 for example, around a given frequency F1, the signal S2 being preserved around its initial central frequency F | 11-28-2013 |
20140091964 | METHOD OF RADAR SURVEILLANCE AND OF RADAR SIGNAL ACQUISITION - A radar includes an antennal structure, with means for transmitting an impulse signal in a band centered on F1 according to a repetition period centered on a recurrence period Tr1 and pulse width T1, with means for receiving signals by the antenna in frequency band ΔF, with a unit for processing the signals received on a set of N distance bins. The signals received are transmitted by another radar in a frequency band centered on F2 where F2−F1≦ΔF, according to a repetition period centered on a period Tr2 and pulse width T2. The signals transmitted by the two radars are asynchronous. The method comprises: slaving frequency F1 to frequency F2, by measuring the power received integrated over the N distance bins and over several recurrences, determination of period Tr2 and T2 and slaving the period centered on Tr1 to a period centered on Tr2 with Tr1=k*Tr2. | 04-03-2014 |
20150123839 | DEVICE FOR DETECTING AND LOCATING MOBILE BODIES PROVIDED WITH RADARS, AND RELATED METHOD - A device for detecting and locating moving objects that are equipped with at least one radar comprises a radar function comprising an antenna disposed on a revolving structure and a radar emissions detector function comprising an antennal part, and is characterized in that the antennal part of the radar emissions detector function is placed on said revolving structure. | 05-07-2015 |
Patent application number | Description | Published |
20090188988 | SPRAY NOZZLE WITH INVERTED FLUID FLOW AND METHOD - A spray nozzle and method are provided in which fluid flow through the nozzle is inverted and in which a portion of a nozzle body may be rotatable adjusted to distribute water in a desired arc of coverage. Water first flows upwardly through the nozzle body, into an adjustable arcuate chamber defined by a helical interface in the nozzle body, is inverted, and is redirected downwardly through the nozzle body. Water may flow upwardly through a first set of flow passages and downwardly through a second set of flow passages. Water is directed downwardly against a distribution surface having an uneven surface profile for improved water distribution to terrain near to and distant from the nozzle. The water is directed downwardly against the distribution surface in the nozzle body and outwardly to surrounding terrain. The flow passages may be adapted to provide a matched precipitation rate for nozzles with different throw radiuses. | 07-30-2009 |
20110147484 | POP-UP IRRIGATION DEVICE FOR USE WITH LOW-PRESSURE IRRIGATION SYSTEMS - A pop-up irrigation device for use in a low pressure irrigation device is described. The device has a housing, a riser partially extensible from the housing and a nozzle body removably attached to an end of the riser in a non-threaded manner, such as using a snap-fit, or in a threaded manner. One, two or more connection tubes or ports may extend laterally from the housing and can each be configured to be connectable to flexible irrigation tubing. Ribs may extend from the housing to facilitate retention when buried. An annular cap can be attached to the open end of the housing and may include an annular, radially-inward extending seal. The closed end of the housing may include a depending stake with a plurality of blades to facilitate mounting of the housing relative to the ground. | 06-23-2011 |
20110147488 | NOZZLE BUSH FOR USE WITH IRRIGATION DEVICES - A nozzle bush is provided for use with an irrigation device, such as a pop-up irrigation device. The nozzle bush includes a plurality of different nozzle bodies removably attached about its periphery, and may include an integrated flush port that can be attached to an irrigation device. | 06-23-2011 |
20110147489 | POP-UP IRRIGATION DEVICE FOR USE WITH LOW-PRESSURE IRRIGATION SYSTEMS - A pop-up irrigation device for use in a low pressure irrigation device is described. The device has a housing, a riser partially extensible from the housing and a nozzle body removably attached to an end of the riser in a non-threaded manner, such as using a snap-fit. One, two or more connection tubes or ports may extend laterally from the housing and can each be configured to be connectable to flexible irrigation tubing. An annular cap can be attached to the open end of the housing and may include an annular, radially-inward extending seal. The closed end of the housing may include a depending stake with a plurality of blades to facilitate mounting of the housing relative to the ground. | 06-23-2011 |
20110285126 | BARBED CONNECTION FOR USE WITH IRRIGATION TUBING - A multi-barbed connection suitable for use in connecting a piece of flexible irrigation tubing is provided, where one of the barbs is a circumferential barb configured for forming a generally fluid tight connection with the tubing and another of the barbs is a corner barb having one or more corners configured for biting into the tubing for at least partially assisting in retaining the tubing on the connection. The connection can be part of a fitting for fluidly joining multiple pieces of tubing or part of an irrigation device, such as a pop-up irrigation sprinkler. | 11-24-2011 |
20120061489 | Sprinkler With Variable Arc and Flow Rate - A variable arc sprinkler may be set to numerous positions along a continuum to adjust the arcuate span of the sprinkler. The sprinkler includes a nozzle body and a valve sleeve that helically engage each other to define an arcuate slot that may be adjusted at the top of the sprinkler to a desired arcuate span. The sprinkler may include a flow rate adjustment device that may be adjusted by actuation or rotation of an outer wall portion of the sprinkler. Rotation of the outer wall portion may cause a throttle control member to move axially to or away from an inlet, or may cause one or more restrictor elements to open or close, to control the flow rate of the sprinkler. | 03-15-2012 |