APPARATUS FOR MEASURING A DISTANCE
    1.
    发明申请
    APPARATUS FOR MEASURING A DISTANCE 有权
    测量距离的装置

    公开(公告)号:US20130120759A1

    公开(公告)日:2013-05-16

    申请号:US13811397

    申请日:2011-07-19

    IPC分类号: G01B11/14

    摘要: The invention relates to an apparatus for measuring a distance. A self-mixing interference (SMI) unit (2) generates an SMI signal, wherein the SMI unit comprises a laser (3) emitting a first laser beam (4) for being directed to an object (5) and wherein the SMI signal depends on an interference of the first laser beam and a second laser beam (6) reflected by the object. A peak width determination unit (8) determines a peak width of the SMI signal, and a distance determination unit (9) determines a distance between the object and the SMI unit depending on the determined peak width of the SMI signal. Since the distance is determined depending on the peak width of the SMI signal, without requiring a laser driving current modulation, advanced electronics for modulating the driving current of the laser are not needed. This reduces the technical efforts needed for determining the distance.

    摘要翻译: 本发明涉及一种用于测量距离的装置。 自混合干扰(SMI)单元(2)产生SMI信号,其中SMI单元包括发射用于被引导到物体(5)的第一激光束(4)的激光器(3),并且其中SMI信号取决于 在所述第一激光束和由所述物体反射的第二激光束(6)的干涉下。 峰值宽度确定单元(8)确定SMI信号的峰值宽度,距离确定单元(9)根据确定的SMI信号的峰值宽度确定对象与SMI单元之间的距离。 由于距离取决于SMI信号的峰值宽度,不需要激光驱动电流调制,因此不需要用于调制激光器的驱动电流的高级电子装置。 这减少了确定距离所需的技术工作。

    Method of operating a SMI sensor and corresponding sensor device
    2.
    发明授权
    Method of operating a SMI sensor and corresponding sensor device 有权
    操作SMI传感器和相应的传感器装置的方法

    公开(公告)号:US08982334B2

    公开(公告)日:2015-03-17

    申请号:US13390545

    申请日:2010-08-10

    CPC分类号: G01S7/483 G01S17/06 G01S17/58

    摘要: The present invention refers to a method of operating a self-mixing interference sensor and a corresponding self-mixing interference sensor device. In the method the laser (1) of the device is controlled to periodically emit a laser pulse followed by an emission period of laser radiation having a lower amplitude. The pulse width of the laser pulse is selected such that the pulse after reflection at the object (3) re-enters the laser (1) during the emission period of laser radiation with lower amplitude. The corresponding SMI signal has an increased signal to noise ratio.

    摘要翻译: 本发明涉及一种操作自混合干涉传感器和相应的自混合干涉传感器装置的方法。 在该方法中,该装置的激光器(1)被控制以周期性地发射激光脉冲,随后是具有较低振幅的激光辐射的发射周期。 选择激光脉冲的脉冲宽度,使得在物体(3)反射之后的脉冲在具有较低振幅的激光辐射的发射周期期间重新进入激光器(1)。 相应的SMI信号具有增加的信噪比。

    Laser sensor system based on self-mixing interference
    3.
    发明授权
    Laser sensor system based on self-mixing interference 有权
    基于自混合干涉的激光传感器系统

    公开(公告)号:US08692979B2

    公开(公告)日:2014-04-08

    申请号:US12812046

    申请日:2009-01-12

    IPC分类号: G01C3/00 G01P3/36

    摘要: A sensor module (1) for measuring the distance to a target and/or the velocity of the target (50), the sensor module (1) comprising at least one laser source (100), at least one detector (200) being adapted to detect modulated laser light and at least one control element the control element (400) being adapted to vary the focus point of the laser light and/or the intensity of the laser light and/or the direction of the laser light. The control of the laser light emitted by the laser source (100) either by active optical devices as variable focus lenses or controllable attenuators or passive optical elements in combination with arrays of laser sources (100) and detectors (200) enable flexible and robust sensor modules.

    摘要翻译: 传感器模块(1),用于测量与目标的距离和/或目标(50)的速度,传感器模块(1)包括至少一个激光源(100),至少一个检测器(200) 以检测调制的激光和至少一个控制元件,所述控制元件(400)适于改变激光的焦点和/或激光的强度和/或激光的方向。 由激光源(100)发射的激光源(由激光源(100))作为可变焦距透镜或可控衰减器或无源光学元件与激光光源(100)和检测器(200)阵列组合而控制的激光使得柔性和鲁棒的传感器 模块。

    APPARATUS FOR DETERMINING A FLOW PROPERTY OF A FLUID
    4.
    发明申请
    APPARATUS FOR DETERMINING A FLOW PROPERTY OF A FLUID 审中-公开
    用于确定流体流动性的装置

    公开(公告)号:US20120002189A1

    公开(公告)日:2012-01-05

    申请号:US13256837

    申请日:2010-03-15

    IPC分类号: G01P3/36

    摘要: The invention relates to an apparatus (1) for determining a flow property of a fluid (2). The apparatus comprises a distance and velocity determination unit (3) for determining distances of elements of the fluid to the distance and velocity determination unit (3) and for determining velocities of the elements at the same time based on a self-mixing interference signal. The apparatus (1) comprises further a flow determination unit (4) for determining the flow property of the fluid (2) based on at least one of the determined distances and velocities. This allows determining the flow property, even if the fluid (2) is optically thick.

    摘要翻译: 本发明涉及一种用于确定流体(2)的流动特性的装置(1)。 该装置包括距离和速度确定单元(3),用于根据距离和速度确定单元(3)确定流体元件的距离,并且用于基于自混合干扰信号同时确定元件的速度。 装置(1)还包括流动确定单元(4),用于基于确定的距离和速度中的至少一个来确定流体(2)的流动性质。 即使流体(2)光学厚,也可以确定流动性。

    Velocity determination apparatus
    9.
    发明授权
    Velocity determination apparatus 有权
    速度测定装置

    公开(公告)号:US09506944B2

    公开(公告)日:2016-11-29

    申请号:US13883007

    申请日:2011-11-01

    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。

    LASER SENSOR SYSTEM BASED ON SELF-MIXING INTERFERENCE
    10.
    发明申请
    LASER SENSOR SYSTEM BASED ON SELF-MIXING INTERFERENCE 有权
    基于自混合干涉的激光传感器系统

    公开(公告)号:US20110007299A1

    公开(公告)日:2011-01-13

    申请号:US12812046

    申请日:2009-01-12

    IPC分类号: G01C3/00

    摘要: A sensor module (1) for measuring the distance to a target and/or the velocity of the target (50), the sensor module (1) comprising at least one laser source (100), at least one detector (200) being adapted to detect modulated laser light and at least one control element the control element (400) being adapted to vary the focus point of the laser light and/or the intensity of the laser light and/or the direction of the laser light. The control of the laser light emitted by the laser source (100) either by active optical devices as variable focus lenses or controllable attenuators or passive optical elements in combination with arrays of laser sources (100) and detectors (200) enable flexible and robust sensor modules.

    摘要翻译: 传感器模块(1),用于测量与目标的距离和/或目标(50)的速度,传感器模块(1)包括至少一个激光源(100),至少一个检测器(200) 以检测调制的激光和至少一个控制元件,所述控制元件(400)适于改变激光的焦点和/或激光的强度和/或激光的方向。 由激光源(100)发射的激光源(由激光源(100))作为可变焦距透镜或可控衰减器或无源光学元件与激光光源(100)和检测器(200)阵列组合而控制的激光使得柔性和鲁棒的传感器 模块。