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公开(公告)号：US11378673B2
公开(公告)日：2022-07-05
申请号：US17098985
申请日：2020-11-16
发明人： Tod M. Schuck , David B. Reese , Mark A. Friesel
摘要： A Doppler radar system includes a Doppler radar processor, a memory in communication with radar processor and a transmit/receive controller. The memory includes computer readable instructions that cause the Doppler radar processor to transmit a radar signal toward the airborne object at a frequency; receive reflected radar signals off of the airborne object, including frequencies produced as a result of Doppler effect due to relative motion between features of the airborne object and the radar system; and Fourier transform the received signals into the frequency domain. Peak frequencies and their harmonic frequency families are sorted and identified. The logarithm of the Fourier transform is calculated to generate a quefrency cepstrum. To identify features producing cyclic, periodic Doppler frequency patterns, peak quefrencies and rahmonic families associated with a quefrency peak are sorted and identified. The rotational state of the airborne object based on the identified quefrency families is determined.
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公开(公告)号：US09008362B1
公开(公告)日：2015-04-14
申请号：US13648767
申请日：2012-10-10
发明人： Mark A. Friesel
IPC分类号： G06K9/00
CPC分类号： G01S7/003 , G01S13/72 , G01S13/867 , G01S13/87 , G06K9/3241 , G06K9/6289
摘要： A method and system is disclosed for tracking object clusters. The method comprises obtaining a first sensor image and a second sensor image. Angular measurements between objects of the first sensor image are determined. Angular measurements between objects of the second sensor image are also determined. Angular measurements from the first sensor image are compared to angular measurements of the second image, and correlated object clusters are identified. The sensor system includes a command and decision unit that receives a first sensor image and a second sensor image. The command and decision unit determines angular measurements for the first sensor image, and determines angular measurements for the second sensor image. The command and decision unit compares the angular measurements for the first sensor image to the angular measurements for the second sensor image, and identifies correlated object clusters based on the comparison.
摘要翻译： 公开了一种跟踪对象集群的方法和系统。 该方法包括获得第一传感器图像和第二传感器图像。 确定第一传感器图像的对象之间的角度测量。 也确定第二传感器图像的对象之间的角度测量。 将来自第一传感器图像的角度测量与第二图像的角度测量值进行比较，并且识别相关对象群集。 传感器系统包括接收第一传感器图像和第二传感器图像的命令和判定单元。 命令和决定单元确定第一传感器图像的角度测量，并且确定第二传感器图像的角度测量。 命令和决定单元将第一传感器图像的角度测量值与第二传感器图像的角度测量值进行比较，并且基于该比较来识别相关对象群集。
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公开(公告)号：US20190041096A1
公开(公告)日：2019-02-07
申请号：US16154319
申请日：2018-10-08
发明人： Mark A. Friesel
摘要： A method for constructing a solar heat collector comprises applying a bit array to a sheet of reflective material to create a sheet of solar reflectors, each bit in the bit array creating a solar reflector having a known focal point; and mating the sheet of solar reflectors to a heat absorbing layer such that at least a portion of the heat absorbing layer passes through a focal point of at least some of the solar reflectors.
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公开(公告)号：US09733341B1
公开(公告)日：2017-08-15
申请号：US14636945
申请日：2015-03-03
发明人： Mark A. Friesel
IPC分类号： G01S7/40
CPC分类号： G01S7/4004 , G01S7/4026 , G01S13/723 , G01S13/878 , G01S13/91
摘要： A system for testing the covariance fidelity of an optimal reduced state estimator comprises data storage devices for storing testing data, computer processors in communication with the data storage devices, and a memory storing program instructions for execution by the computer processors. Execution of the program instructions may cause the computer processors to provide an optimal reduced state estimator having state variables and unknown, multidimensional, arbitrarily time-varying parameters, subject to known bounded values. A random component and a bias component of the optimal reduced state estimator may be identified, and then separate evaluations of the components may be performed to determine a fidelity of the optimal reduced state estimator. The random component may be evaluated at a selected epoch and a Mahalanobis Distance Value determined for the random component. The bias component may be evaluated at the selected epoch and a probability of containment determined at a selected MDV.
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公开(公告)号：US09297886B1
公开(公告)日：2016-03-29
申请号：US13795817
申请日：2013-03-12
IPC分类号： G01S7/292 , G01S13/52 , G01S13/524 , G01S7/00 , G01S13/00
CPC分类号： G01S13/5244 , G01S7/36 , G01S7/414 , G01S7/415 , G01S13/52 , G01S13/582 , G01S13/723
摘要： A method for suppressing clutter when detecting objects of interest in a radar system is provided. The method includes defining a plurality of scatterer classes corresponding to a plurality of predetermined scatterer motion types, at least one of the classes corresponding to ballistic acceleration, and at least one of the classes corresponding to non-ballistic acceleration. A plurality of sensor pulses are transmitted, and reflected return pulses are received. Scatterers identified in the radar return signal are associated with one of the scatterer classes. A set of complex weights is generated and applied to the radar return signal data to null scatterers associated with the class corresponding to ballistic acceleration.
摘要翻译： 提供一种在检测雷达系统中的感兴趣物体时抑制杂波的方法。 该方法包括定义对应于多个预定散射体运动类型的多个散射体类别，对应于弹道加速度的类别中的至少一个以及对应于非弹道加速度的类别中的至少一个。 传输多个传感器脉冲，并且接收反射返回脉冲。 在雷达返回信号中识别的散射体与散射体类之一相关联。 生成一组复杂的权重并将其应用于雷达返回信号数据到与对应于弹道加速度的类相关联的零散射体。
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公开(公告)号：US09140784B1
公开(公告)日：2015-09-22
申请号：US13779398
申请日：2013-02-27
发明人： Mark A. Friesel , Paul Mountcastle
CPC分类号： G01S13/581 , F41H11/00 , G01S7/414 , G01S13/42 , G01S13/582 , G01S13/66 , G01S13/726 , G01S13/89
摘要： A method for identification of one or more launched objects obscured by debris objects within a debris field comprises: directing one or more sensor pulses at the debris field to obtain a plurality of sensor images; identifying objects within the debris field based on the sensor images; determining acceleration characteristics for each of the identified objects within the debris field based on the sensor images; identifying objects exhibiting free fall acceleration characteristics as debris objects; and identifying objects exhibiting centripetal acceleration characteristics as the one or more launched objects.
摘要翻译： 用于识别由碎片场内的碎片物体遮蔽的一个或多个发射物体的方法包括：在碎片场引导一个或多个传感器脉冲以获得多个传感器图像; 基于传感器图像识别碎片场内的物体; 基于所述传感器图像确定所述碎片场内的每个所识别的物体的加速度特性; 识别具有自由落体加速特性的物体作为碎片物体; 以及将表现向心加速度特性的物体识别为一个或多个发射物体。
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公开(公告)号：US20180136326A1
公开(公告)日：2018-05-17
申请号：US15785376
申请日：2017-10-16
发明人： Tod M. Schuck , David B. Reese , Mark A. Friesel
IPC分类号： G01S13/58
CPC分类号： G01S13/583 , F41H11/02 , G01S7/415
摘要： A Doppler radar system includes a Doppler radar processor, a memory in communication with radar processor and a transmit/receive controller. The memory includes computer readable instructions that cause the Doppler radar processor to transmit a radar signal toward the airborne object at a frequency; receive reflected radar signals off of the airborne object, including frequencies produced as a result of Doppler effect due to relative motion between features of the airborne object and the radar system; and Fourier transform the received signals into the frequency domain. Peak frequencies and their harmonic frequency families are sorted and identified. The logarithm of the Fourier transform is calculated to generate a quefrency cepstrum. To identify features producing cyclic, periodic Doppler frequency patterns, peak quefrencies and rahmonic families associated with a quefrency peak are sorted and identified. The rotational state of the airborne object based on the identified quefrency families is determined.
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公开(公告)号：US09292792B1
公开(公告)日：2016-03-22
申请号：US14039298
申请日：2013-09-27
CPC分类号： G06N3/088 , F41H11/00 , G01S7/415 , G01S7/417 , G01S13/726 , G06K9/6261 , G06K9/6278 , G06N5/02 , G06N7/005
摘要： A computerized classifier system that forms convex hulls containing all training experiences for each target class (e.g. threat/non-threat) is disclosed. The intersection of convex hulls for each pair of classes defines a region of ambiguity in feature space. Measurement of feature vector(s) outside an ambiguous region of feature space leads to a class decision while measurement of feature vector(s) within an ambiguous region of feature space defined by convex hulls causes a transition to a new feature space with new features. In particular embodiments, measured feature data includes estimated motion states and electrical lengths of a given object, and range, velocity and acceleration image data from second phase differences for debris mitigation.
摘要翻译： 公开了一种形成包含每个目标类的所有训练经验（例如威胁/非威胁）的凸包的计算机化分类器系统。 每对类的凸包交点定义了特征空间中的模糊区域。 在特征空间的不明确区域之外的特征向量的测量导致类决定，同时由凸包定义的特征空间的不明确区域内的特征向量的测量导致具有新特征的新特征空间的过渡。 在特定实施例中，测量的特征数据包括来自用于碎片减轻的第二相位差的给定对象的估计运动状态和电长度以及范围，速度和加速度图像数据。
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公开(公告)号：US09221557B1
公开(公告)日：2015-12-29
申请号：US13788053
申请日：2013-03-07
发明人： Mark A. Friesel
IPC分类号： B64F1/02
CPC分类号： B64F1/025 , B64C39/024 , B64C2201/182 , B64C2201/187 , B64F1/02
摘要： An apparatus for capture of an unmanned aerial vehicle (UAV) comprises a wind tunnel including at least one fan for generating airflow in the wind tunnel; sensors for sensing characteristics of the UAV; and a control system coupled to said sensors and said at least one fan. The control system is configured to cause the at least one fan to generate airflow based on the sensed characteristics of the UAV to bring the UAV that is in the wind tunnel to a low or zero airspeed above a floor of the wind tunnel, thereby allowing the UAV to be dropped onto the floor of the wind tunnel when the airflow and a motive force of the UAV are stopped.
摘要翻译： 用于捕获无人驾驶飞行器（UAV）的装置包括风洞，其包括用于在风洞中产生气流的至少一个风扇; 用于感测无人机特性的传感器; 以及耦合到所述传感器和所述至少一个风扇的控制系统。 控制系统被配置成使得至少一个风扇基于UAV的感测特征产生气流，以使处于风洞中的无人机在风洞地板上方的低空或零空速，从而允许 当无人机的气流和无人机的动力停止时，无人机落在风洞的地板上。
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公开(公告)号：US20210263140A1
公开(公告)日：2021-08-26
申请号：US17098985
申请日：2020-11-16
发明人： Tod M. Schuck , David B. Reese , Mark A. Friesel
摘要： A Doppler radar system includes a Doppler radar processor, a memory in communication with radar processor and a transmit/receive controller. The memory includes computer readable instructions that cause the Doppler radar processor to transmit a radar signal toward the airborne object at a frequency; receive reflected radar signals off of the airborne object, including frequencies produced as a result of Doppler effect due to relative motion between features of the airborne object and the radar system; and Fourier transform the received signals into the frequency domain. Peak frequencies and their harmonic frequency families are sorted and identified. The logarithm of the Fourier transform is calculated to generate a quefrency cepstrum. To identify features producing cyclic, periodic Doppler frequency patterns, peak quefrencies and rahmonic families associated with a quefrency peak are sorted and identified. The rotational state of the airborne object based on the identified quefrency families is determined.
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