公开(公告)号：US08319949B2

公开(公告)日：2012-11-27

申请号：US12141282

申请日：2008-06-18

申请人： Daniel Cantin ,  Pascal Gallant ,  François Babin

发明人： Daniel Cantin ,  Pascal Gallant ,  François Babin

IPC分类号： G01C3/08

CPC分类号： G01S17/10

摘要： A method for detecting an object using visible light comprises providing a visible-light source having a function of illuminating an environment. The visible-light source is driven to emit visible light in a predetermined mode, with visible light in the predetermined mode being emitted such that the light source maintains said function of illuminating an environment. A reflection/backscatter of the emitted visible light is received from an object. The reflection/backscatter is filtered over a selected wavelength range as a function of a desired range of detection from the light source to obtain a light input. The presence or position of the object is identified with the desired range of detection as a function of the light input and of the predetermined mode.

摘要翻译： 使用可见光检测物体的方法包括提供具有照亮环境的功能的可见光源。 驱动可见光源以预定模式发射可见光，以预定模式的可见光被发射，使得光源保持照亮环境的功能。 从物体接收发射的可见光的反射/反向散射。 反射/反向散射在所选波长范围内作为来自光源的期望的检测范围的函数进行滤波以获得光输入。 物体的存在或位置用作为光输入和预定模式的函数的期望的检测范围来识别。

公开(公告)号：US07554652B1

公开(公告)日：2009-06-30

申请号：US12040008

申请日：2008-02-29

申请人： François Babin ,  Daniel Cantin

发明人： François Babin ,  Daniel Cantin

IPC分类号： G01C3/08

CPC分类号： G01S17/107

摘要： A rangefinding device and a method for determining the range of an object from a rangefinding device are provided. A train of light pulses each having an emission time and a pulse duration is generated. The pulse duration is set to twice the round-trip time to a maximum range of the device. The light pulses are reflected back toward the device by the object and detected according to three time intervals, respectively determined by a background gate, a ranging gate and a pulse energy gate. The light energy received during each interval is integrated and the integrated light value corresponding to the ranging gate is normalized using the values from the other two intervals. The range of the object is determined from the normalized ranging measurement and calibration data.

摘要翻译： 提供了一种测距装置和用于确定来自测距装置的物体的距离的方法。 产生具有发射时间和脉冲持续时间的一串光脉冲。 脉冲持续时间设置为设备最大范围的往返时间的两倍。 光脉冲被对象反射回设备，并根据三个时间间隔进行检测，分别由背景门，测距门和脉冲能量门决定。 在每个间隔期间接收的光能被积分，并且使用来自其它两个间隔的值来对应于测距门的积分光值被归一化。 对象的范围由归一化的测距和校准数据确定。

公开(公告)号：US07388662B2

公开(公告)日：2008-06-17

申请号：US11241634

申请日：2005-09-30

申请人： Daniel Cantin ,  François Babin ,  Marc Lévesque

发明人： Daniel Cantin ,  François Babin ,  Marc Lévesque

IPC分类号： G01N15/02

CPC分类号： G01N21/53 ,  A01M7/0096 ,  G01N15/0205 ,  G01N15/0211 ,  G01N2021/1793 ,  G01N2021/4709 ,  G01S17/88

摘要： An optical system for measuring in real-time the spatial distribution of aerosol particles, such as pesticides or the like, sprayed from a vehicle over an agricultural field. An optical sensor is mounted directly on the vehicle and sends an excitation light beam through the aerosol as it is being sprayed. The resulting scattered light is received and analyzed to deduce therefrom information on the spatial distribution of the particles. This information is relayed to a processing unit, which in turn provides spraying instructions, for example a warning signal, to the operator of the system. The spraying of the aerosol can therefore be controlled in real-time to avoid contamination of sensitive areas.

摘要翻译： 一种用于实时测量车辆在农田上喷洒的气溶胶颗粒（如农药等）的空间分布的光学系统。 光学传感器直接安装在车辆上，并且在喷雾时将激发光束通过气溶胶。 所得到的散射光被接收和分析，从而推导出关于颗粒的空间分布的信息。 该信息被中继到处理单元，处理单元又向系统的操作者提供喷射指令，例如警告信号。 因此可以实时控制气雾剂的喷雾，以避免敏感区域的污染。

公开(公告)号：US07895007B2

公开(公告)日：2011-02-22

申请号：US12604824

申请日：2009-10-23

申请人： Marc Levesque ,  François Babin ,  Daniel Cantin

发明人： Marc Levesque ,  François Babin ,  Daniel Cantin

IPC分类号： G01R13/00

CPC分类号： G01S7/484 ,  G01S7/4868 ,  G01S7/487 ,  G01S17/10

摘要： Methods and apparatuses for reducing the response time along with increasing the probability of ranging of optical rangefinders that digitize the signal waveforms obtained from the pulse echoes returned from various types of objects to be ranged, the pulse echoes being too weak to allow successful ranging from a single waveform or the objects being possibly in motion during the capture of the pulse echoes. In a first embodiment of the invention, the response time at close range of a digital optical rangefinder is reduced by using a signal averaging process wherein the number of data to be averaged varies with the distance according to a predetermined function. In a second embodiment of the invention, the probability of ranging objects in motion along the line of sight of a digital optical rangefinder is increased and the object velocity measured by performing a range shift of each acquired signal waveform prior to averaging. In a third embodiment of the invention, the signal waveforms acquired in the line of sight of a digital optical rangefinder are scanned over a predetermined zone and range shifted and averaged to allow for early detection and ranging of objects that enter in the zone.

公开(公告)号：US07917320B2

公开(公告)日：2011-03-29

申请号：US12604846

申请日：2009-10-23

申请人： Marc Levesque ,  François Babin ,  Daniel Cantin

发明人： Marc Levesque ,  François Babin ,  Daniel Cantin

IPC分类号： G01R29/26 ,  G06F19/00

CPC分类号： G01S7/484 ,  G01S7/4868 ,  G01S7/487 ,  G01S17/10

摘要： Methods and apparatuses for reducing the response time along with increasing the probability of ranging of optical rangefinders that digitize the signal waveforms obtained from the pulse echoes returned from various types of objects to be ranged, the pulse echoes being too weak to allow successful ranging from a single waveform or the objects being possibly in motion during the capture of the pulse echoes. In a first embodiment of the invention, the response time at close range of a digital optical rangefinder is reduced by using a signal averaging process wherein the number of data to be averaged varies with the distance according to a predetermined function. In a second embodiment of the invention, the probability of ranging objects in motion along the line of sight of a digital optical rangefinder is increased and the object velocity measured by performing a range shift of each acquired signal waveform prior to averaging. In a third embodiment of the invention, the signal waveforms acquired in the line of sight of a digital optical rangefinder are scanned over a predetermined zone and range shifted and averaged to allow for early detection and ranging of objects that enter in the zone.

摘要翻译： 减少响应时间的方法和装置以及随着光学测距仪测距的可能性的增加，数字化从从不同类型的物体返回的脉冲回波获得的信号波形，脉冲回波太弱，不能从 在捕获脉冲回波期间，单个波形或物体可能运动。 在本发明的第一实施例中，通过使用信号平均处理来减少数字光学测距仪近距离处的响应时间，其中要平均的数据数量根据预定功能的距离而变化。 在本发明的第二实施例中，沿着数字光学测距仪的视线测量对象的运动概率增加，并且通过在平均之前执行每个获取的信号波形的范围偏移来测量对象速度。 在本发明的第三实施例中，在数字光学测距仪的视线中获取的信号波形在预定的区域上被扫描，并且移动和平均的范围，以允许早期检测和进入该区域的物体的测距。

公开(公告)号：US07640122B2

公开(公告)日：2009-12-29

申请号：US11936502

申请日：2007-11-07

申请人： Marc Levesque ,  François Babin ,  Daniel Cantin

发明人： Marc Levesque ,  François Babin ,  Daniel Cantin

IPC分类号： G06F19/00

CPC分类号： G01S7/484 ,  G01S7/4868 ,  G01S7/487 ,  G01S17/10

摘要： Methods and apparatuses for reducing the response time along with increasing the probability of ranging of optical rangefinders that digitize the signal waveforms obtained from the pulse echoes returned from various types of objects to be ranged, the pulse echoes being too weak to allow successful ranging from a single waveform or the objects being possibly in motion during the capture of the pulse echoes. In a first embodiment of the invention, the response time at close range of a digital optical rangefinder is reduced by using a signal averaging process wherein the number of data to be averaged varies with the distance according to a predetermined function. In a second embodiment of the invention, the probability of ranging objects in motion along the line of sight of a digital optical rangefinder is increased and the object velocity measured by performing a range shift of each acquired signal waveform prior to averaging. In a third embodiment of the invention, the signal waveforms acquired in the line of sight of a digital optical rangefinder are scanned over a predetermined zone and range shifted and averaged to allow for early detection and ranging of objects that enter in the zone.

摘要翻译： 减少响应时间的方法和装置以及随着光学测距仪测距的可能性的增加，数字化从从不同类型的物体返回的脉冲回波获得的信号波形，脉冲回波太弱，不能从 在捕获脉冲回波期间，单个波形或物体可能运动。 在本发明的第一实施例中，通过使用信号平均处理来减少数字光学测距仪近距离处的响应时间，其中要平均的数据数量根据预定功能的距离而变化。 在本发明的第二实施例中，沿着数字光学测距仪的视线测量对象的运动概率增加，并且通过在平均之前执行每个获取的信号波形的范围偏移来测量对象速度。 在本发明的第三实施例中，在数字光学测距仪的视线中获取的信号波形在预定的区域上被扫描，并且移动和平均的范围，以允许早期检测和进入该区域的物体的测距。

公开(公告)号：US20100039637A1

公开(公告)日：2010-02-18

申请号：US12604824

申请日：2009-10-23

申请人： Marc Levesque ,  François Babin ,  Daniel Cantin

发明人： Marc Levesque ,  François Babin ,  Daniel Cantin

IPC分类号： G01C3/08

CPC分类号： G01S7/484 ,  G01S7/4868 ,  G01S7/487 ,  G01S17/10

摘要： Methods and apparatuses for reducing the response time along with increasing the probability of ranging of optical rangefinders that digitize the signal waveforms obtained from the pulse echoes returned from various types of objects to be ranged, the pulse echoes being too weak to allow successful ranging from a single waveform or the objects being possibly in motion during the capture of the pulse echoes. In a first embodiment of the invention, the response time at close range of a digital optical rangefinder is reduced by using a signal averaging process wherein the number of data to be averaged varies with the distance according to a predetermined function. In a second embodiment of the invention, the probability of ranging objects in motion along the line of sight of a digital optical rangefinder is increased and the object velocity measured by performing a range shift of each acquired signal waveform prior to averaging. In a third embodiment of the invention, the signal waveforms acquired in the line of sight of a digital optical rangefinder are scanned over a predetermined zone and range shifted and averaged to allow for early detection and ranging of objects that enter in the zone.

公开(公告)号：US07274448B2

公开(公告)日：2007-09-25

申请号：US11240149

申请日：2005-09-30

申请人： François Babin ,  Marc Lévesque

发明人： François Babin ,  Marc Lévesque

IPC分类号： G01N21/00

CPC分类号： G01N21/53 ,  G01N2021/1793 ,  G01N2021/4709 ,  G01S7/4816 ,  G01S17/95 ,  Y02A90/19

摘要： A flat spatial response LIDAR apparatus for detecting particles within a short range is provided. The apparatus includes a light source projecting a light beam which is back-scattered by the particles to be detected. The back-scattered light is received, detected and analyzed. A spatial filter spatially filters the received back-scattered light in order to flatten the spatial response of the apparatus, so that a same concentration of particles at any distance within the short range will generate a signal of substantially the same intensity. This is for example accomplished by a properly profiled mask disposed in front of the detector, or a plurality of spatially distributed waveguides. As a result, the LIDAR apparatus can compensate for the 1/r2 dependence, or other dependences of the back-scattered light on the distance r.

摘要翻译： 提供了用于检测在短范围内的颗粒的平坦空间响应LIDAR装置。 该装置包括投射被待检测颗粒反向散射的光束的光源。 接收，检测和分析背散射光。 空间滤波器对接收到的反向散射光进行空间滤波，以平坦化装置的空间响应，使得在短距离内的任何距离处的相同浓度的颗粒将产生基本上相同强度的信号。 这例如通过设置在检测器前面的适当轮廓的掩模或多个空间分布的波导来实现。 结果，激光雷达装置可以补偿反射散射光对距离r的1 / r 2/2的依赖性或其他依赖性。

公开(公告)号：US06621067B2

公开(公告)日：2003-09-16

申请号：US09796796

申请日：2001-03-02

申请人： Gang He ,  François Babin ,  Martin Tremblay ,  Marc Breton ,  Steeve Potvin ,  Gregory Walter Schinn

发明人： Gang He ,  François Babin ,  Martin Tremblay ,  Marc Breton ,  Steeve Potvin ,  Gregory Walter Schinn

IPC分类号： G02F101

CPC分类号： H01L31/0203 ,  G02B6/4204 ,  G02B6/4292 ,  H01L31/02325

摘要： A photodetector device comprising a photosensitive detector (12; 96) and one or more interfaces (20′, 20″, 28, 98) between dissimilar media is configured so that a light beam (LB) for detection will pass through the interface(s) along a beam axis that is not normal to the interface(s). The deviation (&thgr;) from the normal will be such that polarization dependent transmission introduced at the interface(s) will compensate for inherent polarization dependency of the detector (12; 96). The deviation may be achieved by inclining the interface(s) relative to a predetermined direction along which the light beam will be incident. Where the photosensitive detector is in a housing (84) with a window (20) through which the light beam enters the housing, the housing can be tilted. In such as case, there are three interfaces, one (28; 98) at the surface of the detector (12; 96), and one at each surface (20′, 20″) of the window (20). Alternatively, the detector surface and/or the window could be tilted. Where a pigtail fiber (116) is permanently attached to the photodetector device to input the light beam through an interposed lens (106), the end of the pigtail fiber may be offset laterally from the lens optical axis (LOA) so that the beam axis deviates from the normal by such an angle that the resulting polarization dependent transmission (PDT) substantially corrects for polarization dependent response (PDR) of the photosensitive detector. An end facet of the pigtail fiber, the lens, and/or the window may be inclined so that they are not perpendicular to the propagation direction of the light beam so as to reduce interference and backreflection effects.

摘要翻译： 包括光敏检测器（12; 96）和不同介质之间的一个或多个接口（20'，20“，28,98）的光检测器设备被配置为使得用于检测的光束（LB）将通过接口 s）沿着不垂直于接口的波束轴。 与正常的偏差（θ）将使得在界面处引入的偏振相关传输将补偿检测器（12; 96）的固有偏振依赖性。 可以通过使界面相对于光束入射的预定方向倾斜来实现偏差。 在光敏检测器位于具有窗口（20）的壳体（84）中，光束通过该窗口进入壳体，壳体可以倾斜。 在这种情况下，在检测器（12; 96）的表面处有三个界面，一个（28; 98），一个在窗口（20）的每个表面（20'，20“）处。 或者，检测器表面和/或窗口可以倾斜。 在猪尾纤维（116）永久地附接到光电检测器装置以通过中介透镜（106）输入光束的情况下，猪尾纤维的端部可以从透镜光轴（LOA）侧向偏移，使得光束轴线 偏离正常，使得所得到的偏振相关透射（PDT）基本上校正光敏检测器的偏振相关响应（PDR）。 引线纤维，透镜和/或窗口的端面可以倾斜，使得它们不垂直于光束的传播方向，以便减少干涉和背反射效应。

公开(公告)号：US06429929B2

公开(公告)日：2002-08-06

申请号：US09821032

申请日：2001-03-30

申请人： François Babin ,  Normand Cyr

发明人： François Babin ,  Normand Cyr

IPC分类号： G01N2100

CPC分类号： G01M11/338 ,  G01M11/333

摘要： In order to avoid errors inherent in the measurement of electrical phase differences or pulse arrival time in relative group delay measurements, different optical signals have their intensity modulated at a common high frequency and different permutations are selected. The amplitudes of corresponding electrical signals are detected and phase differences are computed on the basis of trigonometrical relationships. Because the modulation frequency is known, time differences can be deduced. Apparatus for measuring the phase differences conveniently comprises a slotted wheel (26) which passes selected ones or both of the optical signals. One of the optical signals may be split to produce a third signal with a predetermined phase shift, e.g. about 90 degrees at the modulation frequency and the amplitudes of some possible permutations of the three optical signals used to compute the phase difference. The measurements may be used to compute chromatic dispersion, polarization mode dispersion, elongation, and so on.

摘要翻译： 为了避免在相对组延迟测量中测量电相差或脉冲到达时间固有的错误，不同的光信号在共同的高频下进行强度调制，并选择不同的排列。 检测相应电信号的振幅，并根据三角关系计算相位差。 因为调制频率是已知的，所以可以推导出时间差。 用于测量相位差的装置方便地包括通过所选择的一个或两个光信号的开槽轮（26）。 光信号中的一个可以被分裂以产生具有预定相移的第三信号，例如。 调制频率约90度，用于计算相位差的三个光信号的一些可能排列的幅度。 测量可用于计算色散，偏振模色散，伸长等。