With Laser Patents (Class 342/167)
  • Patent number: 10581150
    Abstract: A test setup for measuring the impact of radar antenna covers is provided. The test setup comprises a radar sensor antenna configured to receive radar radiation and to generate radar radiation, a test antenna configured to generate radar radiation and to receive radar radiation and a radar sensor antenna cover that covers the radar sensor antenna. The test antenna comprises several antenna elements in elevation and/or azimuth direction.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: March 3, 2020
    Assignee: ROHDE & SCHWARZ GMBH & CO. KG
    Inventors: Steffen Heuel, Sherif Ahmed, Andreas Schiessl
  • Patent number: 8952845
    Abstract: A method for adapting the pointing of a radar system in response to distortion of a deckhouse support structure supporting plural antenna arrays of the radar system is provided. The method comprises the steps of making repeated measurements between at least one laser tracker located within the support structure and laser targets mounted within the support structure, and comparing the current measurements with previous measurements to determine physical bias introduced into the structure.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: February 10, 2015
    Assignee: Lockheed Martin Corporation
    Inventors: Dana L. Day, Alan M. Rosenwinkel, David B. Arnal
  • Patent number: 8830119
    Abstract: Systems, apparatuses, and methods for aligning a radar sensor included in a vehicle. One method includes generating a laser cross-beam in front of the radar sensor that is approximately perpendicular to a thrust line of the vehicle and mounting a sensor alignment apparatus on the radar sensor. The sensor alignment apparatus includes a mounting arm and a receiver flag. The mounting arm supports the receiver flag, and the receiver flag includes a first surface that intersects the cross-beam at a first point and a second surface opposite the first surface that intersects the cross-beam at a second point. The method further includes determining a position of the first point, determining a position of the second point, determining a difference between the position of the first point and the position of the second point, and determining an adjustment for the radar sensor based on the difference.
    Type: Grant
    Filed: July 17, 2012
    Date of Patent: September 9, 2014
    Assignee: Robert Bosch GmbH
    Inventor: Robert Borruso
  • Publication number: 20140022115
    Abstract: Systems, apparatuses, and methods for aligning a radar sensor included in a vehicle. One method includes generating a laser cross-beam in front of the radar sensor that is approximately perpendicular to a thrust line of the vehicle and mounting a sensor alignment apparatus on the radar sensor. The sensor alignment apparatus includes a mounting arm and a receiver flag. The mounting arm supports the receiver flag, and the receiver flag includes a first surface that intersects the cross-beam at a first point and a second surface opposite the first surface that intersects the cross-beam at a second point. The method further includes determining a position of the first point, determining a position of the second point, determining a difference between the position of the first point and the position of the second point, and determining an adjustment for the radar sensor based on the difference.
    Type: Application
    Filed: July 17, 2012
    Publication date: January 23, 2014
    Applicant: ROBERT BOSCH GMBH
    Inventor: Robert Borruso
  • Publication number: 20110221627
    Abstract: The invention concerns a Optical modulator, comprising an input suitable to receive an optical carrier, a high-frequency input and an output suitable to transmit an optical signal, the optical modulator comprising two Mach-Zender (1,2) modulators in parallel between the input and output, which constitute two different optical paths, the whole circuit constituting a third Mach-Zender modulator (3), the optical modulator being characterised in that: the first Mach-Zender modulator (1) is provided with an electrode suitable to carry, inside the modulator (1), two signals (RF1, RF2), each obtained by the sum of the two tones fR and fD, of equal power but dephased of ?/2, being further provided an electrode (Bias 1) for realising a Single Side Band modulation of the tones fR and fD; the second Mach-Zender modulator (2) is provided with an electrode (Bias 2) to realise statically a phase inversion of the optical carrier; the third Mach-Zender modulator (3) comprising an electrode (Bias 3) suitable to realise the
    Type: Application
    Filed: September 18, 2008
    Publication date: September 15, 2011
    Applicant: SELEX SISTEMI INTEGRATI S.p.A.
    Inventors: Luigi Pierno, Mauro Varasi
  • Patent number: 7978126
    Abstract: A system for testing radar in accordance with one embodiment comprising a target motion platform; a target motion platform controller for controlling motion of the platform; a radar responsive tag and a delay line located on the target motion platform; the radar which is being tested; and a motion measurement simulator for inputting data to the radar electronics assembly to simulate movement of the radar. In some embodiments the system further comprises a radar motion platform, wherein the radar electronics assembly is positioned on the radar motion platform; a radar motion platform controller for controlling the movement of the radar motion platform; and a master controller coupled to the radar motion platform controller and the target motion platform controller.
    Type: Grant
    Filed: April 28, 2008
    Date of Patent: July 12, 2011
    Assignee: General Atomics
    Inventors: Stanley Isamu Tsunoda, Seong-Hwoon Kim, Josh Pine
  • Publication number: 20090046002
    Abstract: A system for testing radar in accordance with one embodiment comprising a target motion platform; a target motion platform controller for controlling motion of the platform; a radar responsive tag and a delay line located on the target motion platform; the radar which is being tested; and a motion measurement simulator for inputting data to the radar electronics assembly to simulate movement of the radar. In some embodiments the system further comprises a radar motion platform, wherein the radar electronics assembly is positioned on the radar motion platform; a radar motion platform controller for controlling the movement of the radar motion platform; and a master controller coupled to the radar motion platform controller and the target motion platform controller.
    Type: Application
    Filed: April 28, 2008
    Publication date: February 19, 2009
    Applicant: GENERAL ATOMICS, INC.
    Inventors: Stanley Isamu Tsunoda, Seong-Hwoon Kim, Josh Pine
  • Patent number: 7365677
    Abstract: A system for testing radar in accordance with one embodiment comprising a target motion platform; a target motion platform controller for controlling motion of the platform; a radar responsive tag and a delay line located on the target motion platform; the radar which is being tested; and a motion measurement simulator for inputting data to the radar electronics assembly to simulate movement of the radar. In some embodiments the system further comprises a radar motion platform, wherein the radar electronics assembly is positioned on the radar motion platform; a radar motion platform controller for controlling the movement of the radar motion platform; and a master controller coupled to the radar motion platform controller and the target motion platform controller.
    Type: Grant
    Filed: October 19, 2005
    Date of Patent: April 29, 2008
    Assignee: General Atomics Aeronautical Systems, Inc.
    Inventor: Stanley Isamu Tsunoda
  • Patent number: 6809806
    Abstract: Apparatus and method for measuring the angle of elevation of the beam axis (90) of a front-looking radar antenna (68). A first fixture (140) has an indicator (120) for indicating angle of elevation and a first laser (148) aimed in a direction that, as viewed normal to a horizontal surface (192) on which the vehicle is disposed, is parallel to the beam axis for shining on a target (144). A second fixture (142) has a second laser (174) aimed in a direction that, as viewed normal to the horizontal surface, is parallel to the direction of forward vehicle travel for shining on the target. The angle of elevation indicated on the indicator is used as a measure of the angle of elevation of the beam axis of the antenna and the azimuth of the beam axis is verified by the two laser beams shining in a predetermined relationship to each other on the target.
    Type: Grant
    Filed: May 27, 2003
    Date of Patent: October 26, 2004
    Assignee: International Truck Intellectual Property Company, LLC
    Inventors: Gregory S. Carnevale, David Raheb, Paul R. Lefebvre, Douglas J. O'Hara
  • Patent number: 6346909
    Abstract: A system is disclosed for generating simulated radar targets that eliminates the necessity for large outdoor test ranges and is relatively low in cost. The simulated radar target generating system provides complex targets of given simulated dimensions at given simulated distances when stimulated by signals emitted by the radar sensor in the sensor's operational frequency. The dimensions are simulated by the use of multi-tap delay device while the distances (or, range) are simulated by routing the signal, in the form of light, through a fiber optic delay of a desired length. This system, which costs less than $50 thousand, can be located as close as eight feet to the sensor under test.
    Type: Grant
    Filed: September 6, 2000
    Date of Patent: February 12, 2002
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: James B. Johnson, Jr., Michael P. Connolly
  • Patent number: 6262681
    Abstract: A method and apparatus for generating microwave signal frequencies. An incident reference signal is provided. A first stimulus signal is also provided, the first stimulus signal having a first polarization and having a first predetermined relationship with the incident reference signal. A second stimulus signal is also provided, the second stimulus signal having a second polarization and having a second predetermined relationship with the incident reference signal. The incident reference signal is split into a first polarization reference signal and into a second polarization reference signal. The first stimulus signal is coupled with the first polarization reference signal to provide first polarization mixed signals. The second stimulus signal is coupled with the second polarization reference signal to provide second polarization mixed signals.
    Type: Grant
    Filed: September 9, 1999
    Date of Patent: July 17, 2001
    Assignee: HRL Laboratories, LLC.
    Inventor: David L. Persechini
  • Patent number: 6147637
    Abstract: An automotive obstacle detecting system is provided which includes a radar to measure the distance to a target present within a detectable zone. The system monitors a distance limit measurable by the radar and determines a reduction in ability to measure the distance to the target by comparing the distance limit with a given reference value.
    Type: Grant
    Filed: July 23, 1998
    Date of Patent: November 14, 2000
    Assignee: DENSO Corporation
    Inventors: Katsuhiro Morikawa, Tetsuya Nakamura
  • Patent number: 6020844
    Abstract: In a method of adjusting the axis of a car on-board radar, especially, a car on-board mono-pulse radar having the function of transmitting radio waves, light or ultrasonic waves, a car axis and an offset axis are set and the mount angle of an antenna offset-mounted on the offset axis can be adjusted with high precision and with ease through a reduced number of process steps.
    Type: Grant
    Filed: January 6, 1999
    Date of Patent: February 1, 2000
    Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Jie Bai, Mitsuru Nakamura, Kazuhiko Hanawa, Tatsuhiko Monji, Kazuaki Takano, Noriharu Sato
  • Patent number: 5262786
    Abstract: A radar test system for producing multiple delayed replicas of a radio frequency radar signal is provided. A laser diode is adapted to receive the radar signal and generate a modulated optical wave signal carrying the radar signal. The modulated optical wave signal passes through a fiber optic delay line. The delayed optical wave signal engages a partially transmissive and reflective assembly wherein a first portion of the optical wave signal is transmitted therethrough and a second portion is reflected back to the laser diode. That portion of the optical wave signal reflected back to the laser diode is amplified therein and subsequently regenerated. The signal transmitted through the partially transmissive and reflective assembly is demodulated to extract the optical wave leaving only the radar signal. In this manner, a series of multiple echoes of the radar signal is produced.
    Type: Grant
    Filed: October 7, 1992
    Date of Patent: November 16, 1993
    Assignee: Westinghouse Electric Corp.
    Inventor: Michael A. Cross
  • Patent number: 5177488
    Abstract: A programmable fiber optic delay system employs multiple programmable fiber optic delay lines, and switches among the delay lines for inclusion in an overall delay path. Switching among the delay lines is coordinated with the programming of those lines so that only a delay line with a settled delay program is included in the overall delay path. Each delay line consists of a plurality of fiber optic segments of varying length. The line's delay is programmed by switching in particular segments whose aggregate lengths correspond to a desired delay period. The multiple delay lines are used to simulate target speed and distance for use in testing a radar system. The programming of each individual delay line and the switching between lines is preferably controlled by a computer resident in the target simulator.
    Type: Grant
    Filed: October 8, 1991
    Date of Patent: January 5, 1993
    Assignee: Hughes Aircraft Company
    Inventors: Harry T. Wang, Irwin L. Newberg, Adrian E. Popa, Robert R. Hayes, John K. Keigharn, Bill H. Otoide