-
公开(公告)号：US20230102079A1
公开(公告)日：2023-03-30
申请号：US17654031
申请日：2022-03-08
IPC分类号： G01S13/931 , G01S7/40 , G09B9/54
摘要： This document describes techniques and systems for accurate and efficient electromagnetic response for a sensor simulator. Target information and sensor parameters for an electromagnetic sensor are simulated in an environment that includes a ground plane. Electromagnetic rays that may be detected by the sensor or an image of the sensor are launched from the simulated sensor toward the target and an image of the target about the ground plane to determine a complex electromagnetic response of the target. A ray-tracing algorithm is applied to trace the forward wave propagation of electromagnetic rays in the environment that considers rays bouncing between the target and the image of the target. An electromagnetic response can be modeled based on the congregation of the electromagnetic response of all backward paths of all bounces of all rays. In this manner, an efficient and accurate electromagnetic response model may be approximated.
-
公开(公告)号：US20230072642A1
公开(公告)日：2023-03-09
申请号：US17931009
申请日：2022-09-09
发明人： Alexander Ioffe
摘要： Disclosed are aspects of an antenna including a body having a convex surface. A conductive structure is deposited onto an antenna region of the convex surface. The conductive structure is configured as a conformal slot antenna array. The antenna region of the convex surface includes corrugations having peaks and valleys. A plurality of slots of the conformal slot antenna array are located at the peaks and the valleys of the convex surface.
-
公开(公告)号：US11131766B2
公开(公告)日：2021-09-28
申请号：US16359301
申请日：2019-03-20
发明人： Honghui Yan , Tao Zhang , Wolfgang Doerr , Alexander Ioffe
摘要： In a method for the recognition of an object by means of a radar sensor system, a primary radar signal is transmitted into an observation space, a secondary radar signal reflected by the object is received, a Micro-Doppler spectrogram of the secondary radar signal is generated, and at least one periodicity quantity relating to an at least essentially periodic motion of a part of the object is determined based on the Micro-Doppler spectrogram. The determining of the at least one periodicity quantity includes the following steps: (i) determining the course of at least one periodic signal component corresponding to an at least essentially periodic pattern of the Micro-Doppler spectrogram, (ii) fitting a smoothed curve to the periodic signal component, (iii) determining the positions of a plurality of peaks and/or valleys of the smoothed curve, and (iv) determining the periodicity quantity based on the determined positions of peaks and/or valleys.
-
公开(公告)号：US20190310362A1
公开(公告)日：2019-10-10
申请号：US16359301
申请日：2019-03-20
发明人： Honghui Yan , Tao Zhang , Wolfgang Doerr , Alexander Ioffe
摘要： In a method for the recognition of an object by means of a radar sensor system, a primary radar signal is transmitted into an observation space, a secondary radar signal reflected by the object is received, a Micro-Doppler spectrogram of the secondary radar signal is generated, and at least one periodicity quantity relating to an at least essentially periodic motion of a part of the object is determined based on the Micro-Doppler spectrogram. The determining of the at least one periodicity quantity includes the following steps: (i) determining the course of at least one periodic signal component corresponding to an at least essentially periodic pattern of the Micro-Doppler spectrogram, (ii) fitting a smoothed curve to the periodic signal component, (iii) determining the positions of a plurality of peaks and/or valleys of the smoothed curve, and (iv) determining the periodicity quantity based on the determined positions of peaks and/or valleys.
-
公开(公告)号：US20230117339A1
公开(公告)日：2023-04-20
申请号：US17654037
申请日：2022-03-08
IPC分类号： G01S7/40 , G01S13/931 , G01S7/41 , G01S13/89
摘要： This document describes techniques and systems for an adaptive ray-launcher for an electromagnetic response simulator. An adaptive ray-launching process is used to shoot electromagnetic rays at targets in a simulated environment. Uniformly distributed sparse electromagnetic rays are launched at the targets and the angular ray densities relative to the targets are calculated. Several propagation paths that include multipath effects are considered to determine the angular ray densities. Based on the length of the propagation paths of sparse electromagnetic rays with multipath related to each target, denser electromagnetic rays can be launched. The denser electromagnetic rays enable the fidelity related to targets in a far-range to be similar to the fidelity of closer targets. Additionally, any sparse electromagnetics that cannot be detected by a sensor can be disregarded. In this manner, an efficient and accurate electromagnetic response model may be approximated.
-
公开(公告)号：US20220326009A1
公开(公告)日：2022-10-13
申请号：US17658490
申请日：2022-04-08
发明人： Honghui Yan , Alexander Ioffe , Jens Westerhoff
IPC分类号： G01B15/02 , G01S13/931
摘要： A method is disclosed, which is carried out by a detection device having a transmitter element for transmitting wave signals and two vertically aligned receiver elements for receiving wave signals, separated by a given spacing. The method includes transmitting, at the transmitter element, a wave signal that is reflected by the target. Each receiver element receives the wave signal reflected by the target, where the wave signal propagates via multiple paths caused by the reflecting surface. While a target distance varies, a phase difference between the reflected wave signals received by the two receiver elements is measured. From the phase difference measurements, a physical quantity fluctuation is determined in relation to the target distance. The information on the target height is then derived from the physical quantity fluctuation.
-
公开(公告)号：US11177854B2
公开(公告)日：2021-11-16
申请号：US16912855
申请日：2020-06-26
摘要： A method for simulating electromagnetic interactions between an antenna with a reflecting front face and at least one electromagnetic radiator and an electrically large interaction structure placed in front of the antenna comprises providing an antenna model representing the antenna, the antenna model comprising an antenna surface representing the front face and at least one field source representing the at least one radiator, wherein the field source is placed at the antenna surface and is configured as a far field source that is defined by a predetermined radiation pattern, and wherein direct electromagnetic interaction between the field source and the antenna surface is avoided. The method further comprises determining electromagnetic radiation launched by the field source based on the predetermined radiation pattern, propagating the radiation using an asymptotic numerical method, and determining interactions of the radiation with the interaction structure and with the antenna surface.
-
8.发明申请公开(公告)号：US20200003868A1
公开(公告)日：2020-01-02
申请号：US16442743
申请日：2019-06-17
发明人： Honghui Yan , Stephanie Lessmann , Alexander Ioffe
摘要： A method of determining an alignment error of an antenna is described, wherein the antenna is installed at a vehicle and in cooperation with a detection device, and wherein the detection device is configured to determine a plurality of detections. Determining the plurality of detections comprises emitting a first portion of electromagnetic radiation through the antenna, receiving a second portion of electromagnetic radiation through the antenna, and evaluating the second portion of electromagnetic radiation in dependence of the first portion of electromagnetic radiation in order to localize areas of reflection of the first portion of electromagnetic radiation in the vicinity of the antenna. The method comprises determining a first detection and at least a second detection by using the detection device, and determining the alignment error by means of a joint evaluation of the first detection and the second detection.
-
公开(公告)号：US11249171B2
公开(公告)日：2022-02-15
申请号：US16442743
申请日：2019-06-17
发明人： Honghui Yan , Stephanie Lessmann , Alexander Ioffe
IPC分类号： G01S7/40 , G01S13/931 , B60T7/12 , B60W30/14
摘要： A method of determining an alignment error of an antenna is described, wherein the antenna is installed at a vehicle and in cooperation with a detection device, and wherein the detection device is configured to determine a plurality of detections. Determining the plurality of detections comprises emitting a first portion of electromagnetic radiation through the antenna, receiving a second portion of electromagnetic radiation through the antenna, and evaluating the second portion of electromagnetic radiation in dependence of the first portion of electromagnetic radiation in order to localize areas of reflection of the first portion of electromagnetic radiation in the vicinity of the antenna. The method comprises determining a first detection and at least a second detection by using the detection device, and determining the alignment error by means of a joint evaluation of the first detection and the second detection.
-
公开(公告)号：US10657393B2
公开(公告)日：2020-05-19
申请号：US16106510
申请日：2018-08-21
发明人： Maryam Foroughi , Uri Iurgel , Alexander Ioffe
IPC分类号： G06K9/00 , G01S5/02 , G06N20/00 , G01S13/931
摘要： A device for distinguishing between traversable and non-traversable objects. The device includes: an object-detection sensor unit configured generate data about a space around the sensor, a map generation unit configured to use the data to generate an occupancy grid map and a free space grid map for the space around the object-detection sensor unit. Each of the occupancy grid map and the free space grid map includes an array of cells. Each cell of the occupancy grid map contains an occupied space probability value representing the probability for the respective cell being occupied and each cell of the free grid map contains a free space probability value representing the probability for the respective cell being free. The device includes a classifier unit configured to classify at least one of the cells as containing a traversable or non-traversable object by calculating a difference of two free space probability values derived from the free space probability values of at least two of the cells adjacent to the at least one cell and by using the difference as well as the occupied space probability value of the at least one cell to classify the at least one cell.
-
-
-
-
-
-
-
-
-
搜索结果
26 条记录 (耗时 0.019 秒)