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21.发明申请公开(公告)号：US20190324127A1
公开(公告)日：2019-10-24
申请号：US16450534
申请日：2019-06-24
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Xiang Liu , Mingming Gao , Xiaoping Hong , Di Wu
Abstract: Representative embodiments of the present technology include a device for measuring distance to an object. The device comprises a light emitter configured to emit an outbound light pulse and a light sensor configured to receive a returning light pulse and output a pulse signal representing the returning light pulse. The device further comprises a field-programmable gate array (FPGA) coupled to the light sensor and including a time-to-digital converter (TDC) having a series of sequentially coupled delay units. Individual sequentially coupled delay units are associated with corresponding individual delay times. At least some of the sequentially coupled delay units have different individual delay times. The TDC is configured to measure timing information of the pulse signal based at least in part on the individual delay times of the sequentially coupled delay units. The device further includes a controller configured to calculate the distance to the object based on the timing information.
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公开(公告)号：US10148060B2
公开(公告)日：2018-12-04
申请号：US15729551
申请日：2017-10-10
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Xiaoping Hong , Huai Huang , Jiebin Xie
Abstract: A sensor system can comprise a light source generating a light pulse that is collimated, and a plurality of optical elements. Each of the plurality of optical elements is configured to rotate independently about an axis that is substantially common, and the plurality of optical elements operate to collectively direct the light pulse to one or more objects in an angle of view of the sensor system. Furthermore, the sensor system can comprise a detector configured to receive, via the plurality of optical elements, at least a portion of photon energy of the light pulse that is reflected back from the one or more objects in the angle of view of the sensor system, and convert the received photon energy into at least one electrical signal.
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公开(公告)号：US11675076B2
公开(公告)日：2023-06-13
申请号：US16801690
申请日：2020-02-26
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Guoguang Zheng , Xiaoping Hong , Mingyu Wang
CPC classification number: G01S17/10 , G01S7/484 , G01S7/4816 , G01S7/4817
Abstract: A sensor system can comprise a detector with a plurality of units, wherein the detector is configured to generate a first set of electrical signals based on received photon energy of a light beam that is reflected back from a first plurality of points on one or more objects, in a first configuration. Additionally, the detector is configured to generate a second set of electrical signals based on received photon energy of a light beam that is reflected back from a second plurality of points on one or more objects in a second configuration, wherein the first configuration and the second configuration are with a predetermined correlation. Furthermore, the detector can determine distance to each of the first plurality of points and the second plurality of points on the one or more objects based on the first set of electrical signals and the second set of electrical signals.
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公开(公告)号：US11336074B2
公开(公告)日：2022-05-17
申请号：US16927810
申请日：2020-07-13
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Xiaoping Hong , Huai Huang , Jiebin Xie
Abstract: A sensor system includes an optical aperture, a light source configured to generate a light pulse along a first optical path, a reflective surface configured to reflect the light pulse from the first optical path to a second optical path for passing through the optical aperture, a beam steering device positioned in the optical aperture and configured to steer the light pulse along different directions to one or more objects in an angle of view of the sensor system, a detector configured to receive a reflected light pulse and convert the reflected light pulse into an electrical signal, the reflected light pulse being reflected back from the one or more objects and passed through the beam steer device, and a spatial filtering device positioned between the beam steering device and the detector to block undesirable light in both the light pulse and the reflected light pulse.
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公开(公告)号：US20210286079A1
公开(公告)日：2021-09-16
申请号：US17333573
申请日：2021-05-28
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Xiang Liu , Xiaoping Hong , Fu Zhang , Han Chen , Chenghui Long , Xiaofeng Feng
IPC: G01S17/87 , G01S17/931 , G05D1/02 , G01S7/00
Abstract: Disclosed herein are techniques for implementing a distributed sensor (LIDAR) system with a management system (e.g., a controller) that controls and interfaces with multiple sensors in the distributed sensor system. A representative management system can control an operational state (e.g., power on, reset, over-current protection, etc.), an operating mode (e.g., modes corresponding to varying levels of performance), etc. The management system can combine separate outputs from the individual sensors into a combined output (e.g., point cloud). The management system can assist installation of the sensors, manage a self-test and/or a self-calibration of the sensors, or a combination thereof.
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Patent Agency Ranking
公开(公告)号：US20210263303A1
公开(公告)日：2021-08-26
申请号：US17215654
申请日：2021-03-29
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Shuai DONG , Xiaoping Hong , Xiang Liu , Huai Huang , Jin Zhao
Abstract: Disclosed are techniques for scanning an optical beam in two dimensions (e.g. azimuth and elevation) and for increasing or decreasing a field-of-view (FOV) of the scanned beam. Scanning may be performed by various configurations of prisms, rotatable mirrors, and/or rotatable polygonal mirrors. In some configuration, changes to the FOV of the scanned beam may be performed by prisms positioned with a predetermined angular relationship and may include other optical components, as well. Depending on the predetermined angular relationship, the prisms can expand the FOV along one or more axis and/or may compress the FOV along one or more axis.
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公开(公告)号：US10962858B2
公开(公告)日：2021-03-30
申请号：US16582705
申请日：2019-09-25
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Xiaoping Hong , Mingyu Wang , Huai Huang
Abstract: A novel imaging system is provided for capturing imaging data. According to the disclosed embodiments, the imaging system comprises one or more cameras configured to capture the same scene within each camera's field of view. The imaging system also includes a plurality of bandpass filters that may be positioned in front of one or more cameras. Each bandpass filter may allow the transmission of incident electromagnetic signals between different pairs of first and second wavelengths. Accordingly, when the bandpass filters are positioned in front of the one or more cameras, each camera captures a different spectral image, i.e., containing only certain frequency components of the same scene being imaged in the cameras. The bandpass filters may be selectively aligned with one or more cameras by rotating and/or translating the filters relative to the cameras' positions in the imaging system.
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公开(公告)号：US10714889B2
公开(公告)日：2020-07-14
申请号：US16167264
申请日：2018-10-22
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Xiaoping Hong , Huai Huang , Jiebin Xie
Abstract: A sensor system can comprise a light source generating a light pulse that is collimated, and a plurality of optical elements. Each of the plurality of optical elements is configured to rotate independently about an axis that is substantially common, and the plurality of optical elements operate to collectively direct the light pulse to one or more objects in an angle of view of the sensor system. Furthermore, the sensor system can comprise a detector configured to receive, via the plurality of optical elements, at least a portion of photon energy of the light pulse that is reflected back from the one or more objects in the angle of view of the sensor system, and convert the received photon energy into at least one electrical signal.
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公开(公告)号：US10371802B2
公开(公告)日：2019-08-06
申请号：US15944729
申请日：2018-04-03
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Xiang Liu , Mingming Gao , Xiaoping Hong , Di Wu
Abstract: Systems and methods for performing optical distance measurement are provided. In one aspect, a system for measuring a distance to an object comprises a light emitter configured to emit an outbound light pulse, and a light sensor configured to receive a returning light pulse reflected from the object and output an analog pulse signal representing the returning light pulse. The system also comprises a field-programmable gate array (FPGA) coupled to the light sensor. The FPGA is configured to convert the analog pulse signal to a plurality of digital signal values, and generate a plurality of time measurements corresponding to the plurality of digital signal values. The system also comprises a controller configured to calculate the distance to the object based on the plurality of digital signal values and the plurality of time measurements.
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公开(公告)号：US10295659B2
公开(公告)日：2019-05-21
申请号：US15785358
申请日：2017-10-16
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Ke Wang , Chenghui Long , Xiaoping Hong
Abstract: Techniques, systems, and devices relating to conducting calibration of LIDAR systems are disclosed. In one exemplary aspect, a light detection and ranging (LIDAR) device is disclosed. The device comprises a light beam emitter operable to emit a light beam; a prism set positioned in an optical path of the light beam to refract the light beam onto a surface of a surrounding object; a light detector to detect light reflected by the surface of the surrounding object; a controller configured to estimate the surface of the surrounding object based on the detected light. The controller is operable to (1) determine a relative bias in the prism set, and (2) cause, based on the relative bias in the prism set, a compensation for an estimation error in the controller's estimation of the surface of the surrounding object.
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