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公开(公告)号：US20210333375A1
公开(公告)日：2021-10-28
申请号：US17371938
申请日：2021-07-09
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Chuang WANG , Mingming GAO , Xiang LIU , Xiaoping HONG
IPC: G01S7/497 , G04F10/00 , G01S7/4865 , G01S17/14
Abstract: A time measurement correction method includes a field programmable gate array (FPGA) determining to enter a self-correction mode of time measurement, and in the self-correction mode, the FPGA controlling to generate a standard signal and the FPGA controlling to obtain the standard signal and collecting measurement data of at least one TDC channel included in the FPGA based on the standard signal. The standard signal is used to correct the at least one TDC channel of the FPGA.
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公开(公告)号：US20200371216A1
公开(公告)日：2020-11-26
申请号：US16990534
申请日：2020-08-11
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Xiang LIU , Xiaoping HONG
IPC: G01S7/4861 , G01S17/08
Abstract: An integrated circuit includes a transmitter, a signal input channel, a signal sampling circuit, and an analog-to-digital conversion circuit. The transmitter is configured to transmit a ranging signal. The signal input channel is configured to transmit an analog electrical signal corresponding to an echo signal of the ranging signal. The signal sampling circuit includes a switched capacitor array and is configured to sample the analog electrical signal and store a sampled signal of the analog electrical signal. The analog-to-digital conversion circuit is configured to perform analog-to-digital conversion on the sampled signal stored in the signal sampling circuit to generate a digital electrical signal indicating reception time of the echo signal.
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公开(公告)号：US20210333362A1
公开(公告)日：2021-10-28
申请号：US17371870
申请日：2021-07-09
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Senhong HUANG , Liangliang MA , Xiang LIU
Abstract: A light emitting device includes at least two laser emission circuits, each of the laser emission circuits including a power supply, a laser emitter, an energy storage circuit, and a control circuit; in each of the laser emission circuits, the control circuit being configured to turn on the energy storage circuit and the power supply in the laser emission circuit in a first period of time for the power supply to store energy in the energy storage circuit; the control circuit further being configured to turn on the laser emitter and the energy storage circuit in the laser emission circuit in a second period of time for the energy storage circuit to supply power to the laser emitter for the laser emitter to emit a light pulse signal; and two or more laser emission circuits sharing the power supply.
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4.发明申请公开(公告)号：US20210257815A1
公开(公告)日：2021-08-19
申请号：US17246370
申请日：2021-04-30
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Xiang LIU , Shuai DONG , Xiaoping HONG
Abstract: A laser diode chip includes a substrate including a first surface and a second surface, and a laser diode array including at least two laser diodes formed at the substrate. Each of the at least two laser diodes includes a P electrode formed at the first surface of the substrate, an N electrode formed at the second surface of the substrate, and a light emitting region formed between the P electrode and N electrode. Adjacent N electrodes of adjacent laser diodes of the at least two laser diodes are isolated from each other.
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公开(公告)号：US20210208249A1
公开(公告)日：2021-07-08
申请号：US17194291
申请日：2021-03-07
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Xiang LIU , Xiaoping HONG
IPC: G01S7/484 , G01S7/481 , G01S17/10 , G01S7/4861 , G01S17/933
Abstract: A laser distance measurement device includes a transmission circuit configured to emit at least two laser pulse sequences having different emission paths at different times, a receiving circuit configured to receive the at least two laser pulse sequences reflected by an object and perform photoelectric conversion on the at least two laser pulse sequences to obtain at least two electrical signals, a sampling circuit configured to sample the at least two electrical signals to obtain sampling results, and a processing circuit configured to determine a distance to the object to be detected according to the sampling results. Drive signals in the transmission circuit that correspond to the at least two laser pulse sequences share a device of the transmission circuit, and/or the at least two electrical signals share a device of the receiving circuit, a device of the sampling circuit, and/or a device of the processing circuit.
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Patent Agency Ranking
公开(公告)号：US20210132202A1
公开(公告)日：2021-05-06
申请号：US17081913
申请日：2020-10-27
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Xiang LIU , Xiaoping Hong , Guoguang Zheng , Huai Huang , Jiangbo Chen
Abstract: Systems and techniques associated light detection and ranging (LIDAR) applications are described. In one representative aspect, techniques can be used to implement a packaged semi-conductive apparatus is disclosed. The apparatus includes a substrate; a diode die carried by the substrate and positioned to emit an electromagnetic energy beam; and a shell coupled to the substrate to enclose the diode die. The shell includes an opening or a transparent area to allow the electromagnetic energy beam emitted from the diode die to pass through the shell.
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公开(公告)号：US20220003850A1
公开(公告)日：2022-01-06
申请号：US17406972
申请日：2021-08-19
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Xiang LIU , Shuai DONG , Xiaoping HONG
IPC: G01S7/4865 , G01S17/10 , G01S7/497 , G01S7/481
Abstract: A ranging device includes a threshold determination circuit and a detection channel. The threshold determination circuit is configured to determine a candidate comparison threshold according to a threshold-influencing factor. The detection channel is configured to receive a light pulse signal reflected by an object, convert the light pulse signal into an electrical signal, compare the electrical signal with the candidate comparison threshold, obtain time information of the electrical signal triggering the candidate comparison threshold, and determine a distance between the object and the ranging device according to the time information.
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8.发明申请公开(公告)号：US20210286051A1
公开(公告)日：2021-09-16
申请号：US17214709
申请日：2021-03-26
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Xiang LIU , Xiaoping HONG
Abstract: Embodiments of the present disclosure provide an amplification circuit. The amplification circuit includes an operational amplifier; and a clamping circuit being respectively connected to an input terminal and an output terminal of the operational amplifier for clamping an input signal of the amplification circuit to cause the input signal of the amplification circuit to fluctuate within a certain range to prevent the operational amplifier from generating a saturating output.
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公开(公告)号：US20210281040A1
公开(公告)日：2021-09-09
申请号：US17330377
申请日：2021-05-25
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Xiang LIU , Xiaoping HONG , Shuai DONG
IPC: H01S5/0237 , H01S5/068
Abstract: The present disclosure provides a laser diode package. The package includes a sealing body, a laser diode chip placed in the sealing body, and a shaping element disposed on an outer surface of the sealing body and configured to shape light emitted from the laser diode chip.
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公开(公告)号：US20210215564A1
公开(公告)日：2021-07-15
申请号：US17214912
申请日：2021-03-28
Applicant: SZ DJI TECHNOLOGY CO., LTD.
Inventor： Xiaoping HONG , Huan HE , Likui ZHOU , Xiang LIU , Huai HUANG
Abstract: The present disclosure provides a motor state monitoring device. The motor state monitoring device includes a receiver disposed separately from a motor and configured to receive a measured signal emitted by the motor without contact; and a signal processing unit connected to the receiver and configured to determine a state of the motor based on the measured signal, and generate a state signal indicating the state of the motor.
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