公开(公告)号：US20240329212A1

公开(公告)日：2024-10-03

申请号：US18126612

申请日：2023-03-27

Applicant: Rosemount Aerospace Inc.

Inventor： Vincent R. LoPresto ,  Mark D. Ray ,  Kaare Josef Anderson

IPC: G01S7/4861 ,  G01S7/481 ,  G01S17/04 ,  G01S17/88 ,  G01S7/497

CPC classification number: G01S7/4861 ,  G01S7/4811 ,  G01S17/04 ,  G01S17/88 ,  G01S2007/4975

Abstract: A method includes checking an optical detector with a field of view for degradation by: directing the optical detector to a surface of an object in the field of view, wherein the surface is positioned at a given distance from the optical detector, and wherein the surface has a known reflectance; detecting an optical return from the surface with the optical detector to generate a return signal; and determining whether the return signal is representative of a degraded signal. The method includes outputting an alert for maintenance action if the return signal is indicative of a degraded signal.

公开(公告)号：US12085592B2

公开(公告)日：2024-09-10

申请号：US17413499

申请日：2019-12-06

Applicant: ams AG

Inventor： Rahim Akbari-Dilmaghani

IPC: G01R19/04 ,  G01R19/25 ,  G01S7/48 ,  G01S7/4861 ,  H01S5/042 ,  H01S5/40

CPC classification number: G01R19/04 ,  G01R19/2506 ,  G01S7/4804 ,  G01S7/4861 ,  H01S5/0428 ,  H01S5/4025

Abstract: An apparatus and method for current peak detection. The apparatus includes a pulse laser diode array, a sense resistor, a capacitive voltage divider (CVD) electrically coupled to the pulse laser diode array, a first current rectifier, a second current rectifier, a first current peak detector, a second current peak detector, an analog-to-digital converter (ADC) operable to convert the analog outputs from each current peak detector to a digital output signal, and a digital signal processing (DSP) unit operable to detect, from the digital output signal, a current peak pulse at the top and the bottom of the sense resistor.

公开(公告)号：US12025746B2

公开(公告)日：2024-07-02

申请号：US16975560

申请日：2019-03-01

Applicant: OMRON Corporation

Inventor： Naoki Fujiwara ,  Yuki Matsui ,  Kazuo Yamamoto

IPC: G01S7/4861 ,  G01S7/481 ,  G01S17/10 ,  G01S17/894 ,  G01S17/931

CPC classification number: G01S7/4861 ,  G01S7/4816 ,  G01S7/4817 ,  G01S17/10 ,  G01S17/894 ,  G01S17/931

Abstract: A light detection device includes a light projector, a light receiver, a detector, and a controller. The light projector projects light to a predetermined range. The light receiver has a light receiving region in which light is received. The detector detects light by comparing a light reception result by the light receiver with a predetermined threshold. The controller controls the threshold. The controller shifts in turn a range where light is projected from the light projector. The controller, causes the detector to detect light per a portion of the light receiving region, the portion corresponding to a range with light being projected from the light projector, and sets the threshold based on a light reception result by the light receiver in a different portion of the light receiving region from the portion corresponding to the range with light being projected.

公开(公告)号：US20240210533A1

公开(公告)日：2024-06-27

申请号：US18542765

申请日：2023-12-17

Applicant: SUTENG INNOVATION TECHNOLOGY CO., LTD.

Inventor： Jie LUO

IPC: G01S7/4861 ,  G01S7/481

CPC classification number: G01S7/4861 ,  G01S7/4814 ,  G01S7/4816

Abstract: Embodiments of this application disclose an AC coupling circuit, a laser detection module, and a LiDAR. The AC coupling circuit is configured to be accessed by a first AC signal and block a DC component in the first AC signal to output a second AC signal, and the AC coupling circuit includes an impedance matching circuit and a baseline drift reduction circuit. The impedance matching circuit has a signal input terminal configured to be accessed by the first AC signal, and the impedance matching circuit is configured to perform matching on transmission impedance of the AC coupling circuit. The baseline drift reduction circuit is connected with the impedance matching circuit. The baseline drift reduction circuit uses the symmetry of a baseline drift in the AC coupling circuit to reduce the baseline drift in the AC coupling circuit.

公开(公告)号：US20240201375A1

公开(公告)日：2024-06-20

申请号：US18592502

申请日：2024-02-29

Applicant: SUTENG INNOVATION TECHNOLOGY CO., LTD.

Inventor： Changsheng GONG ,  Xi FENG

IPC: G01S17/14 ,  G01S7/481 ,  G01S7/4861 ,  G01S7/497

CPC classification number: G01S17/14 ,  G01S7/4815 ,  G01S7/4861 ,  G01S7/497

Abstract: The present application discloses a LiDAR controlling method and device, an electronic apparatus, and a storage medium. The method includes: in a measurement period, determining an emitting group to be started in the measurement period from a laser emitting array, where the emitting group includes at least two emitting units, and physical positions of the at least two emitting units meet a condition of no optical crosstalk; controlling the at least two emitting units to emit laser beams asynchronously based on a preset rule; controlling a receiving unit group of the laser receiving array corresponding to the emitting group to receive laser echoes, where the laser echoes refer to echoes formed after the laser beams are reflected by a target object; and when at least two emitting groups are determined in the measurement period, controlling the emitting groups to emit the laser beams asynchronously based on the preset rule.

公开(公告)号：US20240183952A1

公开(公告)日：2024-06-06

申请号：US18527403

申请日：2023-12-04

Applicant: GUILIN UNIVERSITY OF TECHNOLOGY

Inventor： Guoqing ZHOU ,  Haotian ZHANG

IPC: G01S7/4861 ,  G01S7/00 ,  G01S7/484 ,  G01S17/89

CPC classification number: G01S7/4861 ,  G01S7/003 ,  G01S7/484 ,  G01S17/89

Abstract: The present disclosure relates to a lightweight and small bathymetry LiDAR multi-channel high sampling rate high-precision real-time synchronous acquisition and storage system, which adopts an ADC+FPGA+ZYNQ architecture to implement four-channel high-rate real-time synchronous parallel sampling, has synchronization error less than 300 ps, sampling rate s as high as 2 GSPS, and sampling precision as high as 14 bits, and comprises an FPGA system acquisition carrier board unit for implementing laser radar echo data acquisition and storage, PMT controlling, data maximum value feedback, peripheral interface design and storage control; a storage daughter board unit for implementing storage of echo data and export of 100 Mbps Ethernet, and an upper computer data conversion software for implementing conversion of original echo data files into decimal or hexadecimal csv files. The system has multi-channel parallel acquisition, high sampling rate and precision, strong real-time performance and functional applicability, and light weight and portability for bathymetry LiDAR.

公开(公告)号：US20240159878A1

公开(公告)日：2024-05-16

申请号：US18389232

申请日：2023-11-14

Applicant: Seer Microelectronics, Inc.

Inventor： Chih-Wei Lai

IPC: G01S7/4861 ,  G01S17/10

CPC classification number: G01S7/4861 ,  G01S17/10

Abstract: A range detection device and a method for range detection thereof are disclosed. An optical sensing element receives a reflected signal of external light signal for triggering a transformation element to generate an electrical signal of receiving detection. Range detection data are generated to an operation processing unit according to the electrical signal of receiving detection and an electrical signal of reference. A plurality of first item data of the range detection data are compressed and operated to generate a plurality of first operation data to be stored as stored data. Further, the first item data correspond to a plurality of first storage addresses. The first operation data correspond to a plurality of second storage addresses. A first address amount of the first storage addresses is greater than a second address amount of the second storage addresses. Thereby, more storage addresses will be spared and hence extending the detection range.

公开(公告)号：US11982768B2

公开(公告)日：2024-05-14

申请号：US16445146

申请日：2019-06-18

Applicant: SZ DJI TECHNOLOGY CO., LTD.

Inventor： Xiang Liu ,  Mingming Gao ,  Xiaoping Hong ,  Di Wu

IPC: G01C3/08 ,  G01S7/4861 ,  G01S17/10 ,  H03K5/133 ,  H03K19/0175 ,  H03K5/24

CPC classification number: G01S7/4861 ,  G01S17/10 ,  H03K5/133 ,  H03K19/017581 ,  H03K5/24

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.

公开(公告)号：USRE49950E1

公开(公告)日：2024-04-30

申请号：US17984975

申请日：2022-11-10

Applicant: LeddarTech Inc.

Inventor： Yvan Mimeault

IPC: G01C3/08 ,  G01S7/10 ,  G01S7/4861 ,  G01S7/4865 ,  G01S7/487

CPC classification number: G01S7/4865 ,  G01S7/10 ,  G01S7/4861 ,  G01S7/487

Abstract: There is provided a system and method for detecting a distance to an object. The method comprises providing a lighting system having at least one pulse width modulated visible-light source for illumination of a field of view; emitting an illumination signal for illuminating the field of view for a duration of time y using the visible-light source at a time t; integrating a reflection energy for a first time period from a time t−x to a time t+x; determining a first integration value for the first time period; integrating the reflection energy for a second time period from a time t+y−x to a time t+y+x; determining a second integration value for the second time period; calculating a difference value between the first integration value and the second integration value; determining a propagation delay value proportional to the difference value; determining the distance to the object from the propagation delay value.

公开(公告)号：US20240134053A1

公开(公告)日：2024-04-25

申请号：US18278178

申请日：2022-02-25

Applicant: Sony Semiconductor Solutions Corporation

Inventor： Stefan ISLER ,  Valerio CAMBARERI

IPC: G01S17/894 ,  G01S7/4861 ,  G01S7/4865 ,  G01S17/66

CPC classification number: G01S17/894 ,  G01S7/4861 ,  G01S7/4865 ,  G01S17/66

Abstract: The present disclosure generally pertains to time-of-flight data generation circuitry, configured to: acquire a time-of-flight (ToF) data stream using a ToF camera; acquire a brightness change event data stream using an event-based vision sensor (EVS), camera; correlate the time-of-flight data stream with the brightness change event data stream in time with each other for generating at least one time-of-flight data frame; and generate the at least one time-of-flight data frame based on the correlation.