公开(公告)号：US11909171B2

公开(公告)日：2024-02-20

申请号：US17219744

申请日：2021-03-31

申请人： Apple Inc.

发明人： Tong Chen ,  Fei Tan ,  Mingzhou Jin

IPC分类号： G01C3/08 ,  H01S5/026 ,  H01L31/0352 ,  H01S5/183 ,  H01S5/34 ,  G01S7/481 ,  G01S7/4912 ,  G01S7/4913

CPC分类号： H01S5/026 ,  G01S7/4812 ,  G01S7/4913 ,  G01S7/4916 ,  G01S7/4917 ,  H01L31/035236 ,  H01S5/18361 ,  H01S5/34

摘要： An optical sensor system includes a set of epitaxial layers formed on a semiconductor substrate. The set of epitaxial layers defines a semiconductor laser having a first multiple quantum well (MQW) structure. Electromagnetic radiation is generated by the first MQW structure, emitted from the first MQW structure, and self-mixed with a portion of the emitted electromagnetic radiation that is returned to the first MQW structure. The set of epitaxial layers also defines a second MQW structure operable to generate a first photocurrent responsive to detecting a first emission of the semiconductor laser, and a third MQW structure operable to generate a second photocurrent responsive to detecting a second emission of the semiconductor laser. The optical sensor system also includes a circuit configured to generate a self-mixing interferometry (SMI) signal by combining the first photocurrent and the second photocurrent.

公开(公告)号：US20230296737A1

公开(公告)日：2023-09-21

申请号：US18325171

申请日：2023-05-30

申请人： AQRONOS, INC.

发明人： Marin Iliev ,  Brenden Villars

IPC分类号： G01S7/481 ,  G01S17/58 ,  G01S7/4911 ,  G01S17/34 ,  G01S7/4912

CPC分类号： G01S7/4817 ,  G01S17/58 ,  G01S7/4911 ,  G01S17/34 ,  G01S7/4916

摘要： A frequency modulated continuous wave LiDAR system is disclosed that may be scalable and integrated in compact and demanding environments. The improved system of the present disclosure includes: an electro-optic modulator configured to modulate a laser generated by a laser source; a balanced photo detector configured to process an interference signal of a local copy of the laser coupled with a signal of the laser returned from a target and output a beatnote signal; a modulation source with two outputs, and a Frequency Information Rapid Extraction for Ranging Applications (“FIRE-RA”) system to receive the interference signal from the balanced photo detector, process the interference signal with a signal from one of the two outputs of the modulation source for the balanced photo detector, and output distance and speed data for the target according to the processed interference signal.

公开(公告)号：US20170059710A1

公开(公告)日：2017-03-02

申请号：US15306205

申请日：2015-03-03

申请人： Robert Bosch GmbH

发明人： Christoph Delfs ,  Frank Fischer ,  Reiner Schnitzer ,  Heiko Ridderbusch ,  Gael Pilard

IPC分类号： G01S17/42 ,  H01S5/183 ,  G01S17/32 ,  G01S7/481 ,  G01S17/58

CPC分类号： G01S17/42 ,  G01S7/4817 ,  G01S7/4916 ,  G01S17/32 ,  G01S17/58 ,  H01S5/183

摘要： An object recognition device having a VCSEL Doppler sensor and an MEMS scanner; the MEMS scanner having at least one deflectable MEMS mirror for scanning an angular region using a laser beam from the VCSEL Doppler sensor; the VCSEL Doppler sensor being connected to a Doppler control and evaluation element that is adapted for determining the velocity and/or the distance of an object.

摘要翻译： 一种具有VCSEL多普勒传感器和MEMS扫描仪的物体识别装置; 所述MEMS扫描器具有至少一个可偏转的MEMS镜，用于使用来自所述VCSEL多普勒传感器的激光束扫描角度区域; VCSEL多普勒传感器连接到适于确定物体的速度和/或距离的多普勒控制和评估元件。

公开(公告)号：US20170038290A1

公开(公告)日：2017-02-09

申请号：US15302949

申请日：2015-02-19

申请人： MITSUBISHI ELECTRIC CORPORATION

发明人： Kenya NAKAI ,  Nobuo TAKESHITA

IPC分类号： G01N15/14 ,  G01N21/49 ,  G01N15/06

CPC分类号： G01N15/1434 ,  G01N15/0211 ,  G01N15/06 ,  G01N21/49 ,  G01N21/53 ,  G01N2015/0046 ,  G01N2015/0693 ,  G01N2015/1454 ,  G01N2201/06113 ,  G01N2201/0683 ,  G01S7/4916 ,  G01S7/499 ,  G01S17/95 ,  H01S5/0028 ,  H01S5/0427 ,  H01S5/0617 ,  H01S5/06832

摘要： A floating particle detection device 1 is capable of accurately identifying the type of a floating particle while achieving simplification of a configuration of the device, the device includes: a laser light irradiator (10) that includes a laser light emitting element (11) and a back-monitor-use light receiving element (12); a scattered light receiver (20) that selectively receives light of a predetermined polarization component among scattered light generated when a floating particle (50) is irradiated and that generates a second detection signal; and an identification processor (30) that identifies the type of the floating particle on the basis of a first detection signal and the second detection signal. Incident light entering the back-monitor-use light receiving element (12) includes: a back-monitor-use laser beam (L0); and backscattered light (Lbs) travelling toward the laser light irradiator (10) among the scattered light (Ls).

摘要翻译： 浮动粒子检测装置1能够在实现装置的构造简化的同时精确地识别浮动粒子的类型，该装置包括：激光照射器（10），其包括激光发射元件（11）和 背部监视器使用的光接收元件（12）; 散射光接收器（20），其在照射浮动粒子（50）时产生的散射光中选择性地接收预定偏振分量的光，并产生第二检测信号; 以及基于第一检测信号和第二检测信号来识别浮动粒子的类型的识别处理器（30）。 入射到背部监视器的受光元件（12）的入射光包括：背面监视用激光束（L0）; 以及在散射光（Ls）中向激光照射器（10）行进的反向散射光（Lbs）。

公开(公告)号：US09506944B2

公开(公告)日：2016-11-29

申请号：US13883007

申请日：2011-11-01

申请人： Mark Carpaij ,  Atanas Pentchev

发明人： Mark Carpaij ,  Atanas Pentchev

IPC分类号： G01P3/36 ,  G01S17/58 ,  G01S7/491 ,  G01S17/87

CPC分类号： G01P3/36 ,  G01P3/366 ,  G01S7/4916 ,  G01S17/58 ,  G01S17/875

摘要： The invention relates to a velocity determination apparatus (1) for determining a velocity of an object (2). A Doppler frequency measuring unit is adapted to measure Doppler frequencies in at least three different frequency directions, wherein a Doppler frequency calculation unit is adapted to calculate a Doppler frequency for a calculation frequency direction being similar to one of the at least three different frequency directions depending on the Doppler frequencies measured for at least two further frequency directions of the at least three different frequency directions. The velocity can then be determined depending on the calculated Doppler frequency and the measured Doppler frequencies. Since in the calculation frequency direction the measured Doppler frequency is not needed for determining the velocity, a reliable velocity can be determined also in the calculation frequency direction, even if the measurement of the Doppler frequency in this calculation frequency direction is disturbed.

摘要翻译： 本发明涉及一种用于确定物体（2）的速度的速度确定装置（1）。 多普勒频率测量单元适于测量至少三个不同频率方向的多普勒频率，其中多普勒频率计算单元适于计算用于计算频率方向的多普勒频率，其类似于至少三个不同频率方向中的一个取决于 在对至少三个不同频率方向的至少两个另外的频率方向测量的多普勒频率上。 然后可以根据所计算的多普勒频率和测量的多普勒频率来确定速度。 由于在计算频率方向上，不需要测定的多普勒频率来确定速度，所以即使在该计算频率方向上的多普勒频率的测量受到干扰，也可以在计算频率方向上确定可靠的速度。

公开(公告)号：US08537341B2

公开(公告)日：2013-09-17

申请号：US12724567

申请日：2010-03-16

申请人： Tatsuya Ueno

发明人： Tatsuya Ueno

IPC分类号： G01C3/08

CPC分类号： G01S17/58 ,  G01S7/4916 ,  G01S17/325

摘要： A physical quantity sensor includes: a semiconductor laser which emits laser light to a measurement target; an oscillation wavelength modulating device that operates the semiconductor laser such that at least one of a first oscillation period and a second oscillation period alternately exists; a detector that detects an electrical signal including interference waveforms, the interference waveforms being caused by a self-coupling effect of the laser light and return light from the measurement target; a signal extracting device that measures each cycle of the interference waveforms whenever the interference waveform is input; a cycle correcting device that compares each cycle of the interference waveforms with a reference cycle to correct the cycles of the interference waveforms; and a calculating device that calculates at least one of displacement and velocity of the measurement target based on each of the cycles of the interference waveforms corrected by the cycle correcting device.

摘要翻译： 物理量传感器包括：向测量对象发射激光的半导体激光器; 振荡波长调制装置，其操作所述半导体激光器，使得交替存在第一振荡周期和第二振荡周期中的至少一个; 检测器，其检测包括干扰波形的电信号，所述干扰波形由激光的自耦合效应和来自测量对象的返回光引起; 信号提取装置，每当输入干扰波形时测量干扰波形的每个周期; 周期校正装置，其将干扰波形的每个周期与参考周期进行比较，以校正干扰波形的周期; 以及计算装置，其基于由所述循环校正装置校正的所述干扰波形的每个周期来计算所述测量对象的位移和速度中的至少一个。

公开(公告)号：US08339584B2

公开(公告)日：2012-12-25

申请号：US12800750

申请日：2010-05-21

申请人： William R. Christian ,  Ray C. Delcher ,  Tong Chen ,  Mohsen Khoshnevisan ,  Phillip B. Liescheski ,  Michael A. Metcalf

发明人： William R. Christian ,  Ray C. Delcher ,  Tong Chen ,  Mohsen Khoshnevisan ,  Phillip B. Liescheski ,  Michael A. Metcalf

IPC分类号： G01P3/36

CPC分类号： G01P5/26 ,  G01S7/4812 ,  G01S7/4916 ,  G01S7/493 ,  G01S7/497 ,  G01S17/58 ,  G01S2007/4977

摘要： A laser Doppler velocimeter uses self-mixing amplification of backreflections from scatterers below the surface of a flow.A time domain signal is divided into segments that are roughly equal to a transit time of particles through a focus of a laser beam. The segments are connected to a frequency domain through the use of an FFT algorithm to produce frequency domain data segments. Signal-to-noise ratio is enhanced through signal processing techniques using the segments to produce a final enhanced signal spectrum.

摘要翻译： 激光多普勒测速仪使用自流混合放大来自流体表面下方的散射体的反射。 时域信号被分成大致等于通过激光束的焦点的粒子的传播时间的片段。 通过使用FFT算法将段连接到频域以产生频域数据段。 通过使用这些段的信号处理技术来提高信噪比以产生最终增强的信号频谱。

公开(公告)号：US20120010858A1

公开(公告)日：2012-01-12

申请号：US13173163

申请日：2011-06-30

申请人： Tatsuya Ueno

发明人： Tatsuya Ueno

IPC分类号： G06F19/00

CPC分类号： G01J1/02 ,  G01S7/4916 ,  G01S7/493 ,  G01S17/325

摘要： A signal evaluating device comprises: a binarizing portion for binarizing an input signal; a run length measuring portion for measuring the run length of the input signal during the evaluating interval, using the output of the binarizing portion as the input; and evaluating means for calculating, from the measurement results of the run length measuring portion, a distribution wherein the noise frequency distribution included in the input signal during the evaluating interval is assumed to be a geometric distribution, and for evaluating whether or not the input signal is valid through comparing the calculated frequency to the run length frequency obtained from the measurement results by the run length measuring portion (probability calculating portion, noise frequency calculating portion, and validity evaluating portion).

摘要翻译： 信号评估装置包括：二值化部分，用于二进制化输入信号; 运行长度测量部分，用于使用二值化部分的输出作为输入来在评估间隔期间测量输入信号的游程长度; 以及评估装置，用于根据游程长度测量部分的测量结果，计算包括在评估间隔期间的输入信号中的噪声频率分布为几何分布的分布，并且用于评估输入信号 通过比较由运行长度测量部分（概率计算部分，噪声频率计算部分和有效性评估部分）从测量结果获得的计算出的频率与运行长度频率的比较来生效。

公开(公告)号：US20120004877A1

公开(公告)日：2012-01-05

申请号：US13169422

申请日：2011-06-27

申请人： Tatsuya Ueno

发明人： Tatsuya Ueno

IPC分类号： G06F19/00

CPC分类号： G01S17/325 ,  G01S7/4916 ,  G01S7/493

摘要： A signal evaluating device comprises: a binarizing portion for binarizing an input signal; a run length measuring portion for measuring the run length of the input signal during the evaluating interval, using the output of the binarizing means as the input; and a validity evaluating portion for evaluating whether or not the input signal is valid, from the degree of matching of a run length frequency distribution, obtained from the measurement results by the run length measuring portion, and a geometric distribution. The validity evaluating portion evaluates whether or not an input signal is valid through a ratio of the total frequency during the evaluation interval to Nsamp/2, or a ratio of the frequency of a class 1 during the evaluating interval to Nsamp/4, where Nsamp is the total of the sampling clocks for measuring the run length during the evaluating interval.

摘要翻译： 信号评估装置包括：二值化部分，用于二进制化输入信号; 行程长度测量部分，用于使用二值化装置的输出作为输入来在评估间隔期间测量输入信号的行程长度; 以及根据由行程长度测量部分的测量结果获得的游程长度频率分布的匹配度和几何分布来评估输入信号是否有效的有效性评估部分。 有效性评估部分通过评估间隔期间的总频率与Nsamp / 2的比率或评估间隔中的类别1的频率与Nsamp / 4之间的比率来评估输入信号是否有效，其中Nsamp 是在评估间隔期间测量运行长度的采样时钟的总和。

公开(公告)号：US20100290030A1

公开(公告)日：2010-11-18

申请号：US12678403

申请日：2008-09-17

申请人： Stephan Groitzsch ,  Wilfried Mehr ,  Bernhard Schmidt ,  Matthias Schorn ,  Christian Gutmann ,  Stefan Stölzl ,  Frank Steinmeier ,  Artur Otto ,  Thomas Zuccaro

发明人： Stephan Groitzsch ,  Wilfried Mehr ,  Bernhard Schmidt ,  Matthias Schorn ,  Christian Gutmann ,  Stefan Stölzl ,  Frank Steinmeier ,  Artur Otto ,  Thomas Zuccaro

IPC分类号： G01P3/36 ,  G01S13/60 ,  G01S17/58

CPC分类号： G01S17/325 ,  G01S7/4916 ,  G01S13/60 ,  G01S13/62 ,  G01S17/58 ,  G01S2013/9353

摘要： A sensor device for detecting a motion state of a motor vehicle. The sensor device includes at least one laser unit having a light source for emitting coherent light which is transmitted in the direction of a roadway surface, and an interference detector which is designed to detect at least one measurement variable which characterizes interference between the light scattered at the surface and the light of the light source. The measurement variable represents a speed component of the sensor device and/or a distance between the sensor device and the roadway surface. The laser unit is coupled to an evaluation device which is designed to determine, from the measurement variable, at least one variable which characterizes the motion state of the vehicle, in particular a speed component of the center of gravity of the vehicle, a rotational angle or a rotation rate of the vehicle.

摘要翻译： 一种用于检测机动车辆的运动状态的传感器装置。 所述传感器装置包括至少一个激光单元，所述至少一个激光单元具有用于发射沿道路表面方向传输的相干光的光源;以及干涉检测器，其被设计成检测至少一个测量变量，所述至少一个测量变量表征在 光源的表面和光。 测量变量表示传感器装置的速度分量和/或传感器装置与道路表面之间的距离。 激光单元耦合到评估装置，该评估装置被设计成从测量变量确定表征车辆的运动状态，特别是车辆重心的速度分量的至少一个变量，旋转角度 或车辆的转速。