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1.发明申请公开(公告)号：US20190011558A1
公开(公告)日：2019-01-10
申请号：US15645311
申请日：2017-07-10
IPC分类号： G01S17/10 , H04L12/28 , H04B10/516 , H04B10/50 , G08G1/16 , G08G1/04 , G01S17/93 , G01S7/486
CPC分类号： G01S17/102 , G01S7/4866 , G01S7/4915 , G01S17/325 , G01S17/89 , G01S17/936 , G08G1/04 , G08G1/16 , H04B10/505 , H04B10/516 , H04L12/2801
摘要： Doppler correction of broadband LIDAR includes mixing, during a first time interval, a returned optical signal with an in-phase version of the transmitted signal to produce a first mixed optical signal that is detected during the first time interval to produce a first electrical signal. During a non-overlapping second time interval the returned optical signal is mixed with a quadrature version of the transmitted signal to produce a second mixed optical signal that is detected during the second time interval to produce a second electrical signal. A complex digital signal uses one of the digitized electrical signals as a real part and a different one as the imaginary part. A signed Doppler frequency shift of the returned optical signal is determined based, at least in part, on a Fourier transform of the complex digital signal. A device is operated based on the Doppler frequency shift.
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公开(公告)号：US10036812B2
公开(公告)日：2018-07-31
申请号：US15192119
申请日：2016-06-24
CPC分类号： G01S17/895 , G01S17/325 , G03H1/0005 , G03H1/0443 , G03H1/0465 , G03H1/0866 , G03H2001/0445 , G03H2001/046 , G03H2001/2655 , G03H2222/33 , G03H2226/13
摘要： Laser 3D imaging techniques include splitting a laser temporally-modulated waveform of bandwidth B and duration D from a laser source into a reference beam and a target beam and directing the target beam onto a target. First data is collected, which indicates amplitude and phase of light relative to the reference beam received at each of a plurality of different times during a duration D at each optical detector of an array of one or more optical detectors perpendicular to the target beam. Steps are repeated for multiple sampling conditions, and the first data for the multiple sampling conditions are synthesized to form one or more synthesized sets. A 3D Fourier transform of each synthesized set forms a digital model of the target for each synthesized set with a down-range resolution based on the bandwidth B.
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3.发明申请公开(公告)号：US20190339388A1
公开(公告)日：2019-11-07
申请号：US16515538
申请日：2019-07-18
IPC分类号： G01S17/10 , H04L12/28 , H04B10/50 , H04B10/516 , G01S7/486 , G01S17/32 , G08G1/04 , G08G1/16 , G01S7/491 , G01S17/89 , G01S17/93
摘要： Doppler correction of broadband LIDAR includes mixing, during a first time interval, a returned optical signal with an in-phase version of the transmitted signal to produce a first mixed optical signal that is detected during the first time interval to produce a first electrical signal. During a non-overlapping second time interval the returned optical signal is mixed with a quadrature version of the transmitted signal to produce a second mixed optical signal that is detected during the second time interval to produce a second electrical signal. A complex digital signal uses one of the digitized electrical signals as a real part and a different one as the imaginary part. A signed Doppler frequency shift of the returned optical signal is determined based, at least in part, on a Fourier transform of the complex digital signal. A device is operated based on the Doppler frequency shift.
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公开(公告)号：US10401495B2
公开(公告)日：2019-09-03
申请号：US15645311
申请日：2017-07-10
IPC分类号： G01S17/10 , H04L12/28 , H04B10/516 , H04B10/50 , G08G1/16 , G08G1/04 , G01S17/93 , G01S7/486
摘要： Doppler correction of broadband LIDAR includes mixing, during a first time interval, a returned optical signal with an in-phase version of the transmitted signal to produce a first mixed optical signal that is detected during the first time interval to produce a first electrical signal. During a non-overlapping second time interval the returned optical signal is mixed with a quadrature version of the transmitted signal to produce a second mixed optical signal that is detected during the second time interval to produce a second electrical signal. A complex digital signal uses one of the digitized electrical signals as a real part and a different one as the imaginary part. A signed Doppler frequency shift of the returned optical signal is determined based, at least in part, on a Fourier transform of the complex digital signal. A device is operated based on the Doppler frequency shift.
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公开(公告)号：US20180224547A1
公开(公告)日：2018-08-09
申请号：US15423978
申请日：2017-02-03
摘要： Doppler correction of phase-encoded LIDAR includes a code indicating a sequence of phases for a phase-encoded signal, and determining a first Fourier transform of the signal. A laser optical signal is used as a reference and modulated based on the code to produce a transmitted phase-encoded optical signal. A returned optical signal is received in response. The returned optical signal is mixed with the reference. The mixed optical signals are detected to produce an electrical signal. A cross spectrum is determined between in-phase and quadrature components of the electrical signal. A Doppler shift is based on a peak in the cross spectrum. A device is operated based on the Doppler shift. Sometimes a second Fourier transform of the electrical signal and the Doppler frequency shift produce a corrected Fourier transform and then a cross correlation. A range is determined based on a peak in the cross correlation.
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6.发明申请公开(公告)号：US20160377724A1
公开(公告)日：2016-12-29
申请号：US15192119
申请日：2016-06-24
CPC分类号： G01S17/895 , G01S17/325 , G03H1/0005 , G03H1/0443 , G03H1/0465 , G03H1/0866 , G03H2001/0445 , G03H2001/046 , G03H2001/2655 , G03H2222/33 , G03H2226/13
摘要： Laser 3D imaging techniques include splitting a laser temporally-modulated waveform of bandwidth B and duration D from a laser source into a reference beam and a target beam and directing the target beam onto a target. First data is collected, which indicates amplitude and phase of light relative to the reference beam received at each of a plurality of different times during a duration D at each optical detector of an array of one or more optical detectors perpendicular to the target beam. Steps are repeated for multiple sampling conditions, and the first data for the multiple sampling conditions are synthesized to form one or more synthesized sets. A 3D Fourier transform of each synthesized set forms a digital model of the target for each synthesized set with a down-range resolution based on the bandwidth B.
摘要翻译： 激光3D成像技术包括将来自激光源的带宽B和持续时间D的激光器时间调制波形分割成参考光束和目标光束，并将目标光束引导到目标上。 收集第一数据，其指示相对于在垂直于目标光束的一个或多个光学检测器的阵列的每个光学检测器处的持续时间D期间在多个不同时间中的每一个处接收的参考光的幅度和相位。 针对多个采样条件重复步骤，并且合成多个采样条件的第一数据以形成一个或多个合成集合。 每个合成集合的3D傅立叶变换基于带宽B形成具有下限范围分辨率的每个合成集合的目标的数字模型。
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7.发明申请公开(公告)号：US20190310372A1
公开(公告)日：2019-10-10
申请号：US16464657
申请日：2017-11-21
发明人： Stephen C. Crouch , Randy R. Reibel , James Curry , Trenton Berg
摘要： Techniques for Doppler correction of chirped optical range detection include obtaining a first set of ranges based on corresponding frequency differences between a return optical signal and a first chirped transmitted optical signal with an up chirp that increases frequency with time. A second set of ranges is obtained based on corresponding frequency differences between a return optical signal and a second chirped transmitted optical signal with a down chirp. A matrix of values for a cost function is determined, one value for each pair of ranges that includes one in the first set and one in the second set. A matched pair of one range in the first set and a corresponding one range in the second set is determined based on the matrix. A Doppler effect on range is determined based on combining the matched pair of ranges. A device is operated based on the Doppler effect.
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公开(公告)号：US10422880B2
公开(公告)日：2019-09-24
申请号：US15423978
申请日：2017-02-03
摘要： Doppler correction of phase-encoded LIDAR includes a code indicating a sequence of phases for a phase-encoded signal, and determining a first Fourier transform of the signal. A laser optical signal is used as a reference and modulated based on the code to produce a transmitted phase-encoded optical signal. A returned optical signal is received in response. The returned optical signal is mixed with the reference. The mixed optical signals are detected to produce an electrical signal. A cross spectrum is determined between in-phase and quadrature components of the electrical signal. A Doppler shift is based on a peak in the cross spectrum. A device is operated based on the Doppler shift. Sometimes a second Fourier transform of the electrical signal and the Doppler frequency shift produce a corrected Fourier transform and then a cross correlation. A range is determined based on a peak in the cross correlation.
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公开(公告)号：US20190242999A1
公开(公告)日：2019-08-08
申请号：US16026085
申请日：2018-07-03
CPC分类号： G01S17/895 , G01S17/325 , G03H1/0005 , G03H1/0443 , G03H1/0465 , G03H1/0866 , G03H2001/0445 , G03H2001/046 , G03H2001/2655 , G03H2222/33 , G03H2226/13
摘要： Laser 3D imaging techniques include splitting a laser temporally-modulated waveform of bandwidth B and duration D from a laser source into a reference beam and a target beam and directing the target beam onto a target. First data is collected, which indicates amplitude and phase of light relative to the reference beam received at each of a plurality of different times during a duration D at each optical detector of an array of one or more optical detectors perpendicular to the target beam. Steps are repeated for multiple sampling conditions, and the first data for the multiple sampling conditions are synthesized to form one or more synthesized sets. A 3D Fourier transform of each synthesized set forms a digital model of the target for each synthesized set with a down-range resolution based on the bandwidth B.
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10.发明申请公开(公告)号：US20190033453A1
公开(公告)日：2019-01-31
申请号：US15661377
申请日：2017-07-27
发明人： Stephen C. Crouch , James Curry , Trenton Berg , Richard Funk , Kyle Oliver , Daniel Ferguson
CPC分类号： G01S17/102 , G01S7/484 , G01S7/4861 , H04B10/40 , H04B10/505 , H04B10/5561 , H04L25/03343 , H04L27/2627
摘要： An apparatus is provided for using a square wave digital chirp signal for optical chirp range detection. A laser source emits an optical signal and a RF waveform generator generates an input digital chirp signal based on the square wave digital chirp signal. A frequency of the optical signal is modulated based on the input digital chirp signal. A splitter divides the optical signal into a transmit optical signal and a reference optical signal. A detector combines the reference optical signal and a return optical signal from an object. The detector generates an electrical output signal based on the combined reference optical signal and the return optical signal. A processor determines a range to the object based on a characteristic of a Fourier transform the electrical output signal. A method is also provided for using the square wave digital chirp signal for optical chirp range detection.
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