Pulsed radar system and method of operating a pulsed radar system

    公开(公告)号:US10768289B2

    公开(公告)日:2020-09-08

    申请号:US15737615

    申请日:2015-06-18

    Applicant: SAAB AB

    Inventor: Anders Silander

    Abstract: The invention relates to a method for operating a pulsed radar system, wherein the pulsed radar system comprises a transmitting antenna, configured to transmit transmission signals, a receiving antenna, configured to receive reflected signals and a signal generating means, configured to generate transmission signals. The method comprises the steps of generating a first transmission signal at a first centre frequency, generating a second transmission signal at a second centre frequency and transmitting the first and the second transmission signals during a predefined transmission time window. The first transmission signal is significantly longer than the second transmission signal. The transmission of the second transmission signal starts during or at the end of the transmission of the first transmission signal and ends essentially at the end of the transmission time window. When the first and/or second transmission signal hits a target a first reflected signal and/or a second reflected signal is generated, wherein the centre frequency of the first reflected signal correlate to the centre frequency of the first transmission signal and the centre frequency of the second reflected signal correlate to the centre frequency of the second transmission signal, and wherein the method further comprises the method step of receiving the first and/or second reflected signal.

    A METHOD FOR DETERMINING THE BASE LINE FOR A SYNTHETIC APERTURE OF A SAR USING GNSS

    公开(公告)号:US20200225360A1

    公开(公告)日:2020-07-16

    申请号:US16648314

    申请日:2018-09-19

    Applicant: SAAB AB

    Abstract: The present invention relates to a method for determining a synthetic aperture of a synthetic aperture radar, SAR, system using information from a global navigation satellite system, GNSS, which includes a plurality of satellites each transmitting a radio frequency signal comprising a unique pseudo random number, PRN. The method comprises: receiving the radio frequency signal from a group of satellites in the GNSS, determining a first maximum correlation peak of the PRN of the received radio frequency signal from each satellite in the group of satellites, determining the phase shift between the first determined maximum correlation peak and a second determined maximum correlation peak of a received PRN from the same satellite at a later time, for each satellite in the group of satellites, determining a line-of-sight, LOS, movement of the SAR system relative each of the satellites in the group of satellites by means of the determined phase shift for each satellite in the group of satellites, and determining a synthetic aperture using the LOS movement relative each satellite in the group of satellites.

    DISPENSER MODULE FOR AIRCRAFT PYLON AND A METHOD FOR LAUNCHING A COUNTERMEASURE

    公开(公告)号:US20200158467A1

    公开(公告)日:2020-05-21

    申请号:US16618578

    申请日:2018-05-28

    Applicant: SAAB AB

    Abstract: A dispenser module for storing and launching countermeasures on an aircraft, comprising a magazine formed by a plurality of cartridges adapted to each hold a countermeasure where the dispenser module is adapted to be mounted in a side wall of an aircraft pylon structure, where the dispenser module comprises a spoiler and a hatch, where the magazine is mounted to the hatch, where the dispenser module is adapted to assume a first idle state in which the spoiler and the hatch are retracted to be flush with the side wall before a countermeasure has been launched, and where the dispenser module is adapted to at least assume a second active state in which the spoiler and the hatch extend outwards from the side wall when a countermeasure is to be launched, and where the dispenser module is adapted to retract to the idle state when a countermeasure has been launched.

    A COMMUNICATION SYSTEM, A COMMUNICATION CONTROLLER AND A NODE AGENT FOR CONNECTION CONTROL BASED ON PERFORMANCE MONITORING

    公开(公告)号:US20200073834A1

    公开(公告)日:2020-03-05

    申请号:US16489483

    申请日:2018-02-26

    Applicant: SAAB AB

    Abstract: A communication controller, a method and a node agent is disclosed, The communication controller comprising: a data transmission port configured to be connected to corresponding logical channels; an application port configured to provide data to or from corresponding applications; a node agent having node control data comprising at least one trained machine learning model, configured to: monitor performance characteristics for data inflow to a data transmission port; monitor an at least one local observable; control the connection between the data transmission port and another data transmission port causing outflow of data, or between the data transmission port and the application port, causing inflow of data if the application port receives data, and outflow of data if the application port sends data; control the connection between the transmission ports and the application ports based on the monitored performance characteristics, the at least one local observable, the at least one trained machine learning model and a local policy matrix.

    DECISION BASED RE-PROCESSING FRAMEWORK FOR RADAR TECHNOLOGY

    公开(公告)号:US20200064460A1

    公开(公告)日:2020-02-27

    申请号:US16495537

    申请日:2017-03-22

    Applicant: SAAB AB

    Inventor: Stefan ERIKSSON

    Abstract: The present disclosure relates to a method for signal processing resource allocation. The method comprises receiving (S10) streaming signal data. The method further comprises, at a first computational resource, determining (S20) a first data subset of the streaming signal data based on a selection criterion, the selection criterion having a contextual relationship with a predetermined scenario. The method also comprises determining (S25) a second data subset of the received streaming signal data based on the first data subset and the contextual relationship. The method additionally comprises, at a second computational resource, analysing (S30) the second data subset using an algorithm based on the contextual relationship. The method further comprises forming (S40) aggregated signal data based on the received streaming signal data and the analysed second data subset. The method yet further comprises outputting (S50) data based on the aggregated signal data. The present disclosure also relates to corresponding systems and computer programs.

    Fluid actuator arrangement
    87.
    发明授权

    公开(公告)号:US10473215B2

    公开(公告)日:2019-11-12

    申请号:US15567925

    申请日:2015-04-21

    Applicant: SAAB AB

    Inventor: Magnus Landberg

    Abstract: An elongated fluid actuator arrangement includes a cylinder body comprising a first and second end portion. A piston body comprising a piston force area forming portion and a sleeve portion, which extends through said first and second end portions and exposes first and second outer section outside the cylinder body. A piston rod extends coaxially through said sleeve portion. The arrangement comprises a first and second extendable and contractible cover member each joined to the cylinder body and to the respective sleeve portion outer section.

    SONAR DEVICE WITH HOLDER
    88.
    发明申请

    公开(公告)号:US20190317201A1

    公开(公告)日:2019-10-17

    申请号:US16464798

    申请日:2016-11-30

    Applicant: SAAB AB

    Inventor: Oskar VIKLUND

    Abstract: The present disclosure relates to a Sonar device (1) for detection of underwater objects. The sonar device (1) comprises a body element (2) comprising a piezo electric element (3). The sonar device further comprises a holder (4) adapted to hold the piezo electric element (3). The holder (4) is arranged to centre the piezo electric element (3) within said body element (2). The holder (4) is arranged such that the piezo electric element (3) is held firmly in place and also provide for that detection can be made omni-directionally. A method for manufacturing a holder (4) and a sonar device (1) is also disclosed.

    SONAR WITH DAMPING STRUCTURE
    89.
    发明申请

    公开(公告)号:US20190317200A1

    公开(公告)日:2019-10-17

    申请号:US16464774

    申请日:2016-11-30

    Applicant: SAAB AB

    Inventor: Oskar VIKLUND

    Abstract: The present disclosure relates to a sonar device (1) for detection of underwater objects. The sonar device comprises a body element (2) having a cavity. A piezo electric element (3) is comprised within the cavity. A resin filling (6) of the cavity protects the piezo electric element (3) from water at underwater operation. The sonar device further comprises a holder (4) adapted to hold the piezo electric element (3). The holder (4) is arranged to centre and hold the piezo electric element (3) within said body element (2). The holder (4) comprises in its structure a plurality of damping structures (5). A method of manufacturing holder and a sonar device is also disclosed.

    SYSTEM AND METHOD FOR DETERMINING TEMPERATURE CHANGES OF AN OPTICAL FIBRE

    公开(公告)号:US20190293500A1

    公开(公告)日:2019-09-26

    申请号:US16269776

    申请日:2019-02-07

    Applicant: SAAB AB

    Abstract: The invention relates to a method for determining temperature changes of an optical fibre (250) having Fiber Bragg Grating (FBG) patterns provided in at least one portion (Portion 1) of said optical fibre (250), said optical fibre (250) being connected between a first detector arrangement (210) and a second detector arrangement (220), the method comprising the steps of:emitting (s410) light into said optical fibre (250) in a first direction (D1) from said first detector arrangement (210), receiving reflections from said (FBG) patterns of such emitted light by said first detector arrangement (210), and processing said reflections for determining a current temperature change related to said optical fibre (250);on the basis of predetermined criteria, emitting (s440) light into said optical fibre (250) in an opposite, second, direction (D2) from said second detector arrangement (220), receiving reflections from said (FBG) patterns of such emitted light by said second detector arrangement (220), and processing said reflections for determining a current temperature change related to said optical fibre (250).The invention relates also to a computer program product comprising program code (P) for a computer (233; 243; 253; 500) for implementing a method according to the invention. The invention relates also to a system (289) for determining temperature changes of an optical fibre (250). The invention also relates to a platform (100) being equipped with the system (289).

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