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41 US2020278203A1
A METHOD, A SYSTEM AND A COMPUTER PROGRAM FOR MEASURING A DISTANCE TO A TARGET
Publication/Patent Number: US2020278203A1 Publication Date: 2020-09-03 Application Number: 16/646,695 Filing Date: 2018-09-12 Inventor: Montagut, Marc   Philippet, Laurent   Ferrando, Sergi   Quidant, Romain   Assignee: FUNDACIÓ INSTITUT DE CIÈNCIES FOTÒNIQUES   INSTITUCIÓ CATALANA DE RECERCA I ESTUDIS AVANÇATS   IPC: G01C3/32 Abstract: The present invention relates to a method for measuring a distance to a target, comprising: a) supplying an excitation signal to a heating element in thermal contact with a thermo-optical material of a thermo-optical lens to change the focal length of said thermo-optical lens to focus on a target; and b) analysing said supplied excitation signal or a control signal originating the same, to determine, based at least on the magnitude of said analysed signal, a distance between said focused target and one of said thermo-optical lens and an optical element arranged in an optical path going from the target to the thermo-optical lens. A system and a computer program adapted to implement the method of the invention are also provided by the present invention.
42 US10718613B2
Ground-based system for geolocation of perpetrators of aircraft laser strikes
Publication/Patent Number: US10718613B2 Publication Date: 2020-07-21 Application Number: 15/392,091 Filing Date: 2016-12-28 Inventor: Fang, Julia A.   Saar, Brian   Reynolds, Tom   Kuchar, James K.   Westhoff, Richard Charles   Tomlinson, Erin   Assignee: Massachusetts Institute of Technology   IPC: G01C3/08 Abstract: Laser light source geolocation. The system includes two spaced-apart ground based sensors for receiving light from a laser source that has been off-axis scattered by air molecules and particulates to form scattered light imagery. A processor operates on the imagery from the two sensors to geolocate the laser light source on the ground.
43 US2020142080A1
METHOD FOR SEARCHING FOR AND DETECTING GAMMA RADIATION SOURCES
Publication/Patent Number: US2020142080A1 Publication Date: 2020-05-07 Application Number: 16/467,815 Filing Date: 2017-10-26 Inventor: Krusanov, Victor Sergeevich   Romanov, Oleg Nikolaevich   Assignee: STATE ATOMIC ENERGY CORPORATION "ROSATOM" ON BEHALF OF THE RUSSIAN FEDERATION   IPC: G01T1/167 Abstract: A method for searching for and detecting gamma radiation sources in conditions of nonuniform radioactive contamination is provided. Stages in which a source of maximally active radiation is determined, the radiation power is measured with a collimated detector and at the same time the distance to the source is determined with the aid of a laser detector rangefinder. Readings of the laser rangefinder and the value of a dose rate are established by the detector are recorded. The dose rate of the radiation of the actual source is calculated, after which, to verify the distance measured to the radiation source, the aiming axis of the rangefinder is moved for a distance horizontally. The measurement is repeated and the distance recorded. The results of successive measurements of the distance are compared. If there is a divergence in the measurements within the laser rangefinder error limits, the information is acknowledged as reliable.
44 US2020060905A1
SMART FOOT POSITION SENSOR FOR POWER WHEELCHAIR USERS, AND SYSTEMS AND METHODS OF USING SAME
Publication/Patent Number: US2020060905A1 Publication Date: 2020-02-27 Application Number: 16/500,002 Filing Date: 2018-04-03 Inventor: Bogie, Kathrine M.   Henzel, Mary Kristina   Majerus, Steven   Mitchell, Steven J.   Assignee: The Government of the United States of America as represented by the Department of Veterans Affairs   CASE WESTERN RESERVE UNIVERSITY   IPC: A61G5/12 Abstract: Disclosed herein is a footplate assembly for monitoring foot position in real time, as a wheelchair is driven. Optionally, the footplate assembly can use an array of force-sensing resistors and infrared distance sensors to detect the pressure and location of the foot within the immediate confines of the footplate. The footplate assembly can be provided as an overlay to an existing wheelchair footplate structure, or the footplate assembly can be integrated into or replace an existing wheelchair footplate structure.
45 US10767989B2
Method and device for detecting a light-emitting object at a traffic junction for a vehicle
Publication/Patent Number: US10767989B2 Publication Date: 2020-09-08 Application Number: 16/183,164 Filing Date: 2018-11-07 Inventor: Zaum, Daniel   Mielenz, Holger   Rohde, Jan   Assignee: Robert Bosch GmbH   IPC: G01C3/08 Abstract: A method for detecting a light-emitting object at a traffic junction for a vehicle, the method including a reading in in which the light signal is read in which represents at least one chronologically changing light range of a light-emitting object. Furthermore, the method includes determining in which a driving parameter of the light-emitting object is determined using the light signal. Finally, the method includes providing, a detection signal being provided using the driving parameter and the detection signal representing a presence and/or an approach of the light-emitting object.
46 US2020279715A1
OPTICAL HEIGHT DETECTION SYSTEM
Publication/Patent Number: US2020279715A1 Publication Date: 2020-09-03 Application Number: 16/650,840 Filing Date: 2018-09-21 Inventor: Zhang, Jian   Kang, Zhiwen   Wang, Yixiang   Assignee: ASML Netherlands B.V.   IPC: H01J37/22 Abstract: An optical height detection system in a charged particle beam inspection system. The optical height detection system includes a projection unit including a modulated illumination source, a projection grating mask including a projection grating pattern, and a projection optical unit for projecting the projection grating pattern to a sample; and a detection unit including a first detection grating mask including a first detection grating pattern, a second detection grating mask including a second detection grating pattern, and a detection optical system for forming a first grating image from the projection grating pattern onto the first detection grating mask and forming a second grating image from the projection grating pattern onto the second detection grating masks. The first and second detection grating patterns at least partially overlap the first and second grating images, respectively.
47 US10545014B2
Inertial dimension metrology
Publication/Patent Number: US10545014B2 Publication Date: 2020-01-28 Application Number: 15/418,444 Filing Date: 2017-01-27 Inventor: Ihlenfeldt, Steven Eugene   Ingham, Edward A.   Assignee: Ihlenfeldt, Steven Eugene   Ingham, Edward A.   IPC: G01B5/008 Abstract: A method of performing dimensional metrology of an object (12) includes incorporating an Inertial Measurement Unit (IMU-18) with an elongate probe (20) in a portable metroprobe (10). A tip (22) of the probe (20) has an offset length (L) from an origin (26) of a coordinate system in the IMU (18) and position (X,Y,Z) thereof is correlated based on attitude (A,B,C) measurement of the IMU (18). The metroprobe (10) is transported in sequence to a complement of survey points (Pn) on the object (12) for measuring corresponding coordinates (X,Y,Z) thereof based on measured attitude (A,B,C) of the IMU (18).
48 US10545238B1
Combining laser pulse transmissions in LiDAR
Publication/Patent Number: US10545238B1 Publication Date: 2020-01-28 Application Number: 15/275,090 Filing Date: 2016-09-23 Inventor: Rezk, Mina A.   Bussat, Jean-marie   Assignee: Apple Inc.   IPC: G01C3/08 Abstract: A light ranging and detection (LiDAR) device may combine the transmission of laser pulses. Different trains of pulses from different transmitters may be combined and transmitted to an environment via a common optical path. The laser pulses transmitted from one train of pulses may be in a polarization state that is orthogonal to a polarization state for the laser pulses of the other train of pulses. Reflections for the different trains of pulses may be received via the common optical path and separated according to polarization state. Reflections of the train of pulses may be directed to one receiver and reflections of the other train of pulses may be directed to a different receiver. The transmission delta between the different trains of pulses may be dynamically configured. The pulse repetition rate of each train of pulses may also be configured.
49 USRE48042E1
Devices and methods for a LIDAR platform with a shared transmit/receive path
Publication/Patent Number: USRE48042E1 Publication Date: 2020-06-09 Application Number: 15/919,479 Filing Date: 2018-03-13 Inventor: Pennecot, Gaetan   Droz, Pierre-yves   Ulrich, Drew Eugene   Gruver, Daniel   Morriss, Zachary   Levandowski, Anthony   Assignee: Waymo LLC   IPC: G01C3/08 Abstract: A LIDAR device may transmit light pulses originating from one or more light sources and may receive reflected light pulses that are then detected by one or more detectors. The LIDAR device may include a lens that both (i) collimates the light from the one or more light sources to provide collimated light for transmission into an environment of the LIDAR device and (ii) focuses the reflected light onto the one or more detectors. The lens may define a curved focal surface in a transmit path of the light from the one or more light sources and a curved focal surface in a receive path of the one or more detectors. The one or more light sources may be arranged along the curved focal surface in the transmit path. The one or more detectors may be arranged along the curved focal surface in the receive path.
50 US10564285B2
Estimation of motion in six degrees of freedom (6DOF) using LIDAR
Publication/Patent Number: US10564285B2 Publication Date: 2020-02-18 Application Number: 15/354,327 Filing Date: 2016-11-17 Inventor: Belsley, Kendall   Sebastian, Richard   Assignee: DSCG Solutions, Inc.   IPC: G01C3/08 Abstract: Techniques of tracking an object involve a Light Detection And Ranging (LIDAR) system. The LIDAR system can be configured to track an object over a period of time, during which the object is moving. Using the LIDAR system tracking of the object can be performed while eliminating illumination hardware (e.g., video camera hardware). Accordingly, the LIDAR system can be configured to operate in total darkness, into the sun, etc. The LIDAR system can be less susceptible to motion of the object than conventional systems. Accordingly, the full rigid-body motion of the object can be determined in some implementations solely from LIDAR measurements, without, for example, video.
51 US10551186B2
Distance measurement device, distance measurement method, and distance measurement program
Publication/Patent Number: US10551186B2 Publication Date: 2020-02-04 Application Number: 15/333,151 Filing Date: 2016-10-24 Inventor: Masuda, Tomonori   Tamayama, Hiroshi   Assignee: FUJIFILM CORPORATION   IPC: G01C3/08 Abstract: A distance measurement device includes an imaging unit, an emission unit which emits directional light as light having directivity to emit the directional light along an optical axis direction of an imaging optical system, a light receiving unit which receives reflected light of the directional light from a subject, a derivation unit which derives a distance to the subject based on a timing at which the directional light is emitted by the emission unit and a timing at which the reflected light is received by the light receiving unit, and a control unit which performs control such that the emission unit sets a timing, at which the directional light is emitted, to a predetermined period during which the influence of the emission of the directional light on an image signal is suppressed.
52 US2020056874A1
INERTIAL DIMENSIONAL METROLOGY
Publication/Patent Number: US2020056874A1 Publication Date: 2020-02-20 Application Number: 16/661,762 Filing Date: 2019-10-23 Inventor: Ihlenfeldt, Steven Eugene   Ingham, Edward A.   Assignee: Ihlenfeldt, Steven Eugene   Ingham, Edward A.   IPC: G01B5/008 Abstract: A method of performing dimensional metrology of an object (12) includes incorporating an Inertial Measurement Unit (IMU-18) with an elongate probe (20) in a portable metroprobe (10). A tip (22) of the probe (20) has an offset length (L) from an origin (26) of a coordinate system in the IMU (18) and position (X,Y,Z) thereof is correlated based on attitude (A,B,C) measurement of the IMU (18). The metroprobe (10) is transported in sequence to a complement of survey points (Pn) on the object (12) for measuring corresponding coordinates (X,Y,Z) thereof based on measured attitude (A,B,C) of the IMU (18).
53 US2020011664A1
METHOD, DEVICE, AND PROGRAM FOR SURVEYING
Publication/Patent Number: US2020011664A1 Publication Date: 2020-01-09 Application Number: 16/442,616 Filing Date: 2019-06-17 Inventor: Sasakl, You   Assignee: TOPCON CORPORATION   IPC: G01C1/02 Abstract: Detection of a target by a surveying device is automated to achieve simple work. A surveying method uses a surveying device for detecting and identifying a target device having an entire circumference reflection prism and a code display that is arranged in a vertical direction. The surveying device has a laser scanner configured to perform laser scanning along a vertical plane while horizontally rotating. The surveying method includes performing laser scanning by emitting laser scanning light along the vertical plane while making the surveying device horizontally rotate, and detecting the code display on the basis of the laser scanning light that is reflected back.
54 US2020096333A1
MEASUREMENT APPARATUS AND CONTROL METHOD OF MEASUREMENT APPARATUS
Publication/Patent Number: US2020096333A1 Publication Date: 2020-03-26 Application Number: 16/574,909 Filing Date: 2019-09-18 Inventor: Nishita, Nobuyuki   Assignee: TOPCON CORPORATION   IPC: G01C3/08 Abstract: A measurement apparatus is provided that includes a distance measuring unit, a deflecting unit, and a calculation control unit which controls the distance measuring unit and the deflecting unit. The calculation control unit detects coordinates of a pair of intersection points of the object to be measured and a scan trajectory with the measurement light on the basis of a distance measurement result by the distance measuring unit and the direction of emission deflected by the deflecting unit. The calculation control unit controls a deflection operation of the deflecting unit so as to change the direction of emission on the basis of the coordinates of the pair of intersection points such that the scan trajectory with the measurement light and the object to be measured intersect with each other.
55 US2020098129A1
SYSTEM AND METHOD OF MULTIROTOR DYNAMICS BASED ONLINE SCALE ESTIMATION FOR MONOCULAR VISION
Publication/Patent Number: US2020098129A1 Publication Date: 2020-03-26 Application Number: 16/580,403 Filing Date: 2019-09-24 Inventor: Ludhiyani, Mohit   Rustagi, Vishvendra   Sinha, Arnab   Dasgupta, Ranjan   Assignee: Tata Consultancy Services Limited   IPC: G06T7/70 Abstract: Robotic vision-based framework wherein an on-board camera device is used for scale estimation. Unlike conventional scale estimation methods that require inputs from more than one or more sensors, implementations include a system and method to estimate scale online solely, without any other sensor, for monocular SLAM by using multirotor dynamics model in an extended Kalman filter framework. This approach improves over convention scale estimation methods which require information from some other sensors or knowledge of physical dimension of an object within the camera view. An arbitrary scaled position and an Euler angle of a multirotor are estimated from vision SLAM (simultaneous localization and mapping) technique. Further, dynamically integrating, computed acceleration to estimate a metric position. A scale factor and a parameter associated with the multirotor dynamics model is obtained by comparing the estimated metric position with the estimated arbitrary position.
56 US2020027234A1
LOCATION INFORMATION IDENTIFYING METHOD, LOCATION INFORMATION IDENTIFYING DEVICE, AND LOCATION INFORMATION IDENTIFYING PROGRAM
Publication/Patent Number: US2020027234A1 Publication Date: 2020-01-23 Application Number: 16/337,991 Filing Date: 2017-09-28 Inventor: Kasahara, Hajime   Assignee: KASAHARA, Hajime   IPC: G06T7/70 Abstract: [Problem] To provide a location information identifying method for accurately specifying a position and the like of an object shown in an image. [Solution] A location information identifying method includes; a step for obtaining the object image 3 photographed by the drive recorder 2; a step for obtaining the first scale plate image 42 obtained when the first scale plate 4 arranged so as to be opposed to the drive recorder 2 at the first distance X apart from the drive recorder 2 is photographed; a step for overlapping the first scale plate image 42 and the object image 3 with each other; a step for measuring the image-height A, which is the distance from the object 5 located at the preset height H1 to the center of the object image 3, appeared on the object image 3, by using the first scale plate image 42; a step for calculating the angle B between the horizontal plane and the straight line joining the drive recorder 2 to the object 5, by using image-height A and the first distance X; and a step for calculating the target distance Y1 from the drive recorder 2 to the object 5, based on the height difference H between the drive recorder 2 and the object 5 and the angle B as well.
57 EP3612791A1
PRODUCTS AND PROCESSES FOR MEASURING THE SURFACE PROFILE OF A CROP OR PASTURE
Publication/Patent Number: EP3612791A1 Publication Date: 2020-02-26 Application Number: 18787920.0 Filing Date: 2018-04-20 Inventor: Barton, Richard Athol   Assignee: Farmote Limited   IPC: G01B11/06
58 US202036913A1
IMAGING APPARATUS AND SOLID-STATE IMAGING DEVICE USED THEREIN
Publication/Patent Number: US202036913A1 Publication Date: 2020-01-30 Application Number: 20/191,659 Filing Date: 2019-10-02 Inventor: Nohara, Takuya   Asano, Takuya   Assignee: Panasonic Intellectual Property Management Co., Ltd.   IPC: H04N5/33 Abstract: An imaging apparatus includes: an infrared light source; and a solid-state imaging device. The solid-state imaging device includes: light receivers that convert incident light from the subject to signal charges; a signal storage that stores the signal charges; a signal drain into which the signal charges are discharged; microlenses disposed on the light receivers; and openings through which the incident light enters the light receivers. The solid-state imaging device reads and discharges the signal charges in response to a signal drain voltage being switched between on and off. Each microlens is disposed such that the center of the microlens is displaced toward the center of the pixel array from the center of the corresponding light receiver, as the position of the microlens is closer to the perimeter of the pixel array. The openings have different shapes according to the positions of the openings in the pixel array.
59 CN110914638A
使用反射光源的智能物体追踪
Under Examination
Title (English): Smart object tracking using a reflective light source
Publication/Patent Number: CN110914638A Publication Date: 2020-03-24 Application Number: 201880046774.4 Filing Date: 2018-07-18 Inventor: 钱昊   Assignee: 杭州他若定位科技有限公司   IPC: G01S17/06 Abstract: 一种用于物体追踪的方法。该方法包括:捕捉场景的图像序列;基于沿该图像序列的局部光变化的模式,检测该场景中的反射光源;回应于检测到该反射光源,将该反射光源在该图像序列的至少一个图像中的位置与该至少一个图像内的目标位置进行比较以生成结果;以及基于该结果生成用于改变相机设备的视场的控制信号,使得在该视场内该反射光源与该目标位置实质对准,其中该反射光源发射物体反射光。
60 US10663565B2
Pulsed-based time of flight methods and system
Publication/Patent Number: US10663565B2 Publication Date: 2020-05-26 Application Number: 15/708,268 Filing Date: 2017-09-19 Inventor: Boutaud, Frederic   Li, Mei   Assignee: Rockwell Automation Technologies, Inc.   IPC: G01C3/08 Abstract: A time of flight sensor device is provided that is capable of generating accurate information relating to propagation time of emitted light pulses using a small number of measurements or data captures. By generating pulse time of flight information using a relatively small number of measurement cycles, object distance information can be generated more quickly, resulting in faster sensor response times. Embodiments of the time of flight sensor can also minimize or eliminate the adverse effects of ambient light on time of flight measurement. Moreover, some embodiments execute time of flight measurement techniques that can achieve high measurement precision even when using relatively long light pulses having irregular, non-rectangular shapes.