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61 US10704904B2
Distance detection device
Publication/Patent Number: US10704904B2 Publication Date: 2020-07-07 Application Number: 15/925,773 Filing Date: 2018-03-20 Inventor: Lee, Hun Kwang   Lee, Sai Mun   Chu, Lye Pin   Assignee: PixArt Imaging Inc.   IPC: G06T7/00 Abstract: A distance detection device includes a light source, a light guiding component, an image sensor and a processor. The light guiding component is disposed adjacent to the light source and includes a discontinuous surface. The light guiding component is adapted to project a beam emitted from the light source onto an object to form an illuminating pattern spotted by the discontinuous surface. The image sensor is adapted to capture an image about the object. The processor is electrically connected with the image sensor and utilized to analyze position variation of a spot formed by the discontinuous surface within the image for determining a distance of the object.
62 US202011664A1
Publication/Patent Number: US202011664A1 Publication Date: 2020-01-09 Application Number: 20/191,644 Filing Date: 2019-06-17 Inventor: Sasakl, You   Assignee: Topcon Corporation   IPC: G01C15/06 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.
63 US10627522B2
System and method for an edge injection etalon
Publication/Patent Number: US10627522B2 Publication Date: 2020-04-21 Application Number: 15/124,837 Filing Date: 2015-03-12 Inventor: Hays, Paul Byron   Lindemann, Scott K.   Assignee: Michigan Aerospace Corporation   IPC: G01C3/08 Abstract: The invention is directed to a device and method for conducting measurement of a Doppler shift caused by molecular and aerosol movement while simultaneously providing measurement of temperature using LIDAR. The device incorporates a light source; and a Fabry-Perot etalon having a resonant cavity formed with two plane parallel reflecting surfaces, wherein the light source is positioned relative to the a Fabry-Perot etalon such that light is injected into a plane parallel resonant cavity of the Fabry-Perot etalon at an angle of incidence other than normal to the reflecting surfaces. The Fabry-Perot etalon may be formed with each of the parallel reflecting surfaces having different reflectivities. The light source may be positioned to direct the light to bypass a first reflective surface of the plane parallel resonator cavity, and/or implemented using a divergent light source. In addition, the Fabry-Perot etalon may be formed to include an aperture in at least one mirror surface or an edge portion in at least one mirror surface through which the light is directed into the resonant cavity. The device may also incorporate a detector for detecting a fringe pattern outputted by the Fabry-Perot etalon.
64 US10670397B2
Distance measuring device and method of measuring distance by using the same
Publication/Patent Number: US10670397B2 Publication Date: 2020-06-02 Application Number: 15/821,071 Filing Date: 2017-11-22 Inventor: Otsuka, Tatsuhiro   Kim, Jungwoo   Yoon, Heesun   Hwang, Inoh   Assignee: SAMSUNG ELECTRONICS CO., LTD.   IPC: G01V8/00 Abstract: Provided is a distance measuring device and a method of measuring a distance. The distance measuring device detects light reflected by an object, generates an electrical signal based on the detected light, detects whether the electrical signal is saturated or not by comparing the electrical signal with a reference value, controls a magnitude of the electrical signal based on whether the signal is saturated, and calculates a distance to the object using the electrical signal.
65 EP3622315A1
Publication/Patent Number: EP3622315A1 Publication Date: 2020-03-18 Application Number: 17923425.7 Filing Date: 2017-08-31 Inventor: Zheng, Guoguang   Hong, Xiaoping   Wang, Mingyu   Assignee: SZ DJI Technology Co., Ltd.   IPC: G01S7/481
66 US2020065987A1
Publication/Patent Number: US2020065987A1 Publication Date: 2020-02-27 Application Number: 16/667,509 Filing Date: 2019-10-29 Inventor: Hikosaka, Shingo   Onishi, Tomoya   Assignee: CANON KABUSHIKI KAISHA   IPC: G06T7/593 Abstract: Parallax information in a first direction is obtained from a first imaging device and a second imaging device. Parallax information in a second direction differing from the first direction is obtained from a first photoelectric conversion portion included in the first imaging device and a second photoelectric conversion portion included in the first imaging device. Distance information on a distance to an object is obtained from the parallax information in the first direction and the parallax information in the second direction.
67 US2020103525A1
Publication/Patent Number: US2020103525A1 Publication Date: 2020-04-02 Application Number: 16/567,376 Filing Date: 2019-09-11 Inventor: Yasutomi, Satoshi   Komeichi, Takahiro   Ito, Tadayuki   Assignee: TOPCON CORPORATION   IPC: G01S17/02 Abstract: A surveying system includes a target unit having a reflection target and an encoder pattern showing an angle of the target unit; a scanner configured to acquire three-dimensional point cloud data, measured coordinates of the target, and optically read the encoder pattern to acquire an encoder pattern read angle; and a leveling base configured to selectively allow either of the target unit and the scanner to be removably mounted. The scanner calculates a direction angle of the leveling base based on the encoder pattern read angle and the offset angle of the target unit, calculates coordinates of an installation point of the target unit based on the measured coordinates of the target and the direction angle of the target, and calculates a direction angle of the scanner based on the offset angle of the scanner and the direction angle of the leveling base on which the scanner is mounted.
68 US10539418B2
Target detection apparatus and method
Publication/Patent Number: US10539418B2 Publication Date: 2020-01-21 Application Number: 15/913,304 Filing Date: 2018-03-06 Inventor: Yokoi, Yusuke   Assignee: DENSO CORPORATION   IPC: G01C3/08 Abstract: In a target detection apparatus mounted in a vehicle, a target detector is configured to detect a target present in a forward direction of the vehicle based on image information acquired from an imager to capture images of a scene ahead of the vehicle. A position-of-collision calculator is configured to calculate an expected position of collision at which the target is expected to collide with the vehicle in the future based on a position of the target relative to the vehicle. A first determiner is configured to, based on the expected position of collision calculated by the position-of-collision calculator, determine whether or not a situation exists where a determination as to whether or not the target is a traversing target that is a target moving in a direction transverse to a forward direction of the vehicle can be made based on an optical flow of the target.
69 US10630877B2
System, method, and program for calculating distance
Publication/Patent Number: US10630877B2 Publication Date: 2020-04-21 Application Number: 15/737,806 Filing Date: 2017-02-28 Inventor: Sugaya, Shunji   Assignee: OPTIM CORPORATION   IPC: H04N5/232 Abstract: The present invention is to provide a system to take an image efficiently at a measurement accuracy which the user desires without changing the zoom factor of the camera. The system for calculating a distance 1 of the present invention includes an airborne imaging device 2 and a controller 3. The control unit 40 of the airborne imaging device 2 performs the rectangular size acquisition module 41 and acquires the rectangular size of an object to be imaged that is computer analyzable. Then, the control unit 40 performs the distance calculation module 42 and calculates the distance between the object to be imaged and the imaging device based on the rectangular size acquired by the processing of the rectangular size acquisition module 41.
70 US10656252B1
Adaptive control of Ladar systems using spatial index of prior Ladar return data
Publication/Patent Number: US10656252B1 Publication Date: 2020-05-19 Application Number: 16/356,046 Filing Date: 2019-03-18 Inventor: Dussan, Luis Carlos   Steinhardt, Allan   Presutti, Federico   Benscoter, Joel David   Assignee: AEYE, INC.   IPC: G01C3/08 Abstract: Disclosed herein are examples of ladar systems and methods where data about a plurality of ladar returns from prior ladar pulse shots gets stored in a spatial index that associates ladar return data with corresponding locations in a coordinate space to which the ladar return data pertain. This spatial index can then be accessed by a processor to retrieve ladar return data for locations in the coordinate space that are near a range point to be targeted by the ladar system with a new ladar pulse shot. This nearby prior ladar return data can then be analyzed by the ladar system to help define a parameter value for use by the ladar system with respect to the new ladar pulse shot. Examples of such adaptively controlled parameter values can include shot energy, receiver parameters, shot selection, camera settings, and others.
71 US10684305B2
Apparatus, systems and methods for cross track error calculation from active sensors
Publication/Patent Number: US10684305B2 Publication Date: 2020-06-16 Application Number: 16/296,596 Filing Date: 2019-03-08 Inventor: Zielke, Roger   Fick, Chad   Assignee: Ag Leader Technology   IPC: G01C3/08 Abstract: The disclosed apparatus, systems and methods relate to determining cross track error between a stored planted location and the actual physical location of plants. An array of active light sensors is mounted on a vehicle for travel above the plants. The array of active light sensors generate an electrical signal from each sensor corresponding to the reflected light from the sensor. A computer system generates a reflectance curve from the array of sensors to determine the location of a plant below the array of sensors and also generates the cross track error.
72 US10704865B2
Laser designation verification tool
Publication/Patent Number: US10704865B2 Publication Date: 2020-07-07 Application Number: 15/669,640 Filing Date: 2017-08-04 Inventor: Steenson, Jr. James H.   Janiak, Derek P.   Assignee: BAE Systems Information and Electronic Systems Integration Inc.   IPC: G01C3/08 Abstract: Techniques are provided for a laser designation verification device and a method of laser designation verification using the device. The laser designation verification device includes: a lens to sense a first reflection, the first reflection coming from an encoded first laser beam reflecting off a first target; an electronic processing element to decode the sensed first reflection into a first code; and a portable electronic annunciator to provide identification of the first target to an operator of the device based on the decoded first reflection. The method includes: sensing a first reflection using the lens, the first reflection coming from an encoded first laser beam reflecting off a first target; decoding the sensed first reflection into a first code using the processing element; and providing, by the annunciator to an operator of the device, identification of the first target based on the decoded first reflection.
73 US10746543B2
Apparatus for measuring distance using two-step tracking based on SPAD sensor and method thereof
Publication/Patent Number: US10746543B2 Publication Date: 2020-08-18 Application Number: 16/058,448 Filing Date: 2018-08-08 Inventor: Jung, Seong Ook   Park, Jung Hyun   Park, Jong Ha   Assignee: INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY   IPC: G01C3/08 Abstract: Disclosed are an apparatus for measuring distance using two-step tracking and a method thereof. More particularly, the apparatus includes a bit generator configured to generate coarse bits for first tracking from sensing data to measure distance to a target and fine bits for second tracking, corresponding to the coarse bits, to measure precise distance to the target; a coarse bit processor configured to receive the coarse bits, address the received coarse bits in any one histogram bin, which corresponds to the received coarse bits, among a plurality of histogram bins, and output coarse bits, which correspond to any one histogram bin exceeding a preset threshold among the histogram bins, as reference coarse bits; and a fine bit processor configured to output fine bits corresponding to the reference coarse bits.
74 EP3714232A1
Publication/Patent Number: EP3714232A1 Publication Date: 2020-09-30 Application Number: 18799721.8 Filing Date: 2018-11-06 Inventor: Weitbrecht, Christof   Amann, Christian   Steigleder, Ralf   Kniprath, Rolf   Assignee: Robert Bosch GmbH   IPC: G01C3/08
75 US10620302B2
Adaptive coding for Lidar systems
Publication/Patent Number: US10620302B2 Publication Date: 2020-04-14 Application Number: 16/539,240 Filing Date: 2019-08-13 Inventor: Zhu, Xuezhou   Xiang, Shaoqing   Assignee: HESAI PHOTONICS TECHNOLOGY CO., LTD.   IPC: G01C3/08 Abstract: A Lidar system is provided. The Lidar system comprise: a light source configured to emit a multi-pulse sequence to measure a distance between the Lidar system and a location in a three-dimensional environment, and the multi-pulse sequence comprises multiple pulses having a temporal profile; a photosensitive detector configured to detect light pulses from the three-dimensional environment; and one or more processors configured to: determine a coding scheme comprising the temporal profile, wherein the coding scheme is determined dynamically based on one or more real-time conditions including an environment condition, a condition of the Lidar system or a signal environment condition; and calculate the distance based on a time of flight of a sequence of detected light pulses, wherein the time of flight is determined by determining a match between the sequence of detected light pulses and the temporal profile.
76 US10705213B2
Optical apparatus
Publication/Patent Number: US10705213B2 Publication Date: 2020-07-07 Application Number: 16/239,227 Filing Date: 2019-01-03 Inventor: Chern, Jyh-long   Yen, Chih-ming   Assignee: EVERREADY PRECISION IND. CORP.   IPC: G01C3/08 Abstract: An optical apparatus includes a photosensitive element, a lens and a microstructure unit. The microstructure unit is arranged between the photosensitive element and the lens. After plural light beams passing through the lens are received by the microstructure unit, travelling directions of the plural light beams are changed. Consequently, at least a portion of the plural light beams is guided to the photosensitive element. In such way, the light collecting efficacy of the photosensitive element is enhanced.
77 US10581221B1
Laser diode firing system
Publication/Patent Number: US10581221B1 Publication Date: 2020-03-03 Application Number: 16/394,627 Filing Date: 2019-04-25 Inventor: Lenius, Samuel William   Droz, Pierre-yves   Assignee: Waymo LLC   IPC: G01C3/08 Abstract: A laser diode firing circuit for a light detection and ranging device is disclosed. The firing circuit includes a laser diode coupled in series to a transistor, such that current through the laser diode is controlled by the transistor. The laser diode is configured to emit a pulse of light in response to current flowing through the laser diode. The firing circuit includes a capacitor that is configured to charge via a charging path that includes an inductor and to discharge via a discharge path that includes the laser diode. The transistor controlling current through the laser diode can be a Gallium nitride field effect transistor.
78 US10564264B2
Detection light ranging apparatus and method
Publication/Patent Number: US10564264B2 Publication Date: 2020-02-18 Application Number: 15/653,574 Filing Date: 2017-07-19 Inventor: Chen, Yuandan   Han, Yajun   Sha, Chuang   Wu, Kefang   Feng, Lingling   Zhang, Min   Assignee: BOE TECHNOLOGY GROUP CO., LTD.   BEIJING BOE DISPLAY TECHNOLOGY CO., LTD.   IPC: G01C3/08 Abstract: The disclosure relates to a detection light ranging apparatus and method. The detection light ranging apparatus of the disclosure comprises: a detection light emitting circuit that emits detection light; a first optical assembly that divides the detection light into a first sub-detection light and a second sub-detection light; a second optical assembly that receives the second sub-detection light and causes the second sub-detection light to be emitted after being reflected at least once after being reflected by the measured object; and a timing circuit that receives the first sub-detection light and starts timing to obtain a first time, and receives the second sub-detection light emitted after being reflected at least once and finishes timing to obtain a second time. The detection light ranging apparatus of the disclosure can solve the technical problem of poor measuring precision of the prior ranging apparatuses.
79 US2020003556A1
Publication/Patent Number: US2020003556A1 Publication Date: 2020-01-02 Application Number: 16/460,685 Filing Date: 2019-07-02 Inventor: Kimura, Akiteru   Assignee: Magik Eye Inc.   IPC: G01C3/08 Abstract: In one embodiment, a method for calculating a distance to an object includes simultaneously activating a first projection point and a second projection point of a distance sensor to collectively project a reference pattern into a field of view, activating a third projection point of the distance sensor to project a measurement pattern into the field of view, capturing an image of the field of view, wherein the object, the reference pattern, and the measurement pattern are visible in the image, calculating a distance from the distance sensor to the object based on an appearance of the measurement pattern in the image, detecting a movement of a lens of the distance sensor based on an appearance of the reference pattern in the image, and adjusting the distance as calculated based on the movement as detected.
80 US2020228793A1
Publication/Patent Number: US2020228793A1 Publication Date: 2020-07-16 Application Number: 16/727,482 Filing Date: 2019-12-26 Inventor: Handa, Yoichiro   Wada, Yoichi   Assignee: CANON KABUSHIKI KAISHA   IPC: H04N17/00 Abstract: A photoelectric conversion device includes a first pixel including a photoelectric converter, a first node to which charge is transferred from the photoelectric converter, and a first transistor that resets a voltage of the first node, and configured to output a first signal in accordance with a voltage of the first node, a second pixel including a second node to which a predetermined voltage is supplied and a second transistor that resets a voltage of the second node, and configured to output a second signal in accordance with a voltage of the second node; and a control line connected to the first transistor and the second transistor. The first transistor resets the first node to a first voltage, and the second transistor resets the second node to a second voltage having a smaller amplitude than the first voltage.