公开(公告)号：US20220075073A1

公开(公告)日：2022-03-10

申请号：US17455635

申请日：2021-11-18

Applicant: DENSO CORPORATION

Inventor： Naoki YOSHIMOTO

IPC: G01S17/931 ,  G01J1/42 ,  G01S17/58 ,  G01S17/89 ,  G01S7/481

Abstract: In a ranging device, a background light calculation unit calculates, for each of a plurality of bearing regions, a background light level parameter related to a level of background light arriving from the bearing region. A coefficient calculation unit calculates multiplier coefficients for the bearing regions such that the multiplier coefficient for each peripheral bearing region around a subject bearing region is negatively correlated with a difference in the background light level parameter between the subject bearing region and the peripheral bearing region. A coefficient-multiplied waveform generation unit generates, for each of the subject bearing region and the peripheral bearing regions, coefficient-multiplied waveform data acquired by multiplying ranging waveform data by the corresponding multiplier coefficient. An integrated waveform generation unit generates integrated waveform data by integrating the coefficient-multiplied waveform data for the subject bearing region and the peripheral bearing regions.

公开(公告)号：US20240094361A1

公开(公告)日：2024-03-21

申请号：US18520432

申请日：2023-11-27

Applicant: DENSO CORPORATION

Inventor： Naoki YOSHIMOTO ,  Chihiro MORIGUCHI

IPC: G01S7/4915 ,  G01S7/4912 ,  G01S7/493 ,  G01S17/34

CPC classification number: G01S7/4915 ,  G01S7/4917 ,  G01S7/493 ,  G01S17/34

Abstract: A fine section setting unit of a laser radar device sets, for a beat signal waveform indicating time change of a beat signal amplitude of an up beat signal, a plurality of fine sections within time ranges of the beat signal waveform. A fine section extraction unit extracts at least one fine section satisfying a preset extraction condition indicating that the beat signal amplitude in the fine section is high, from among the set plurality of fine sections. A peak detection unit subjects the beat signal in the extracted fine section to frequency analysis to calculate a fine section frequency spectrum and detect a peak frequency, which is a peak in the fine section frequency spectrum.

公开(公告)号：US20250085424A1

公开(公告)日：2025-03-13

申请号：US18955708

申请日：2024-11-21

Applicant: DENSO CORPORATION

Inventor： Chihiro MORIGUCHI ,  Naoki YOSHIMOTO ,  Tetsuya SHIMOGAKI ,  Tatsuya YAMASHITA ,  Makoto NAKAI

IPC: G01S17/34 ,  G01S7/4915 ,  G01S17/36 ,  G01S17/931

Abstract: A frequency sweep characteristic measurement device splits the laser light to generate a difference in lengths of optical paths and combines the split laser lights to generate a combined light. This device receives the combined light, converts the received light into a beat signal, and outputs the beat signal. Further, this device adjusts a waveform so that an amplitude and a phase match at both ends of the beat signal, calculates a quadrature component by performing a Hilbert transform on the beat signal whose waveform has been adjusted, and calculates an instantaneous phase of the beat signal by calculating an inverse tangent of the quadrature component and the beat signal whose waveform has been adjusted. This device calculates the frequency sweep characteristic of the laser light based on the instantaneous phase and the difference in the lengths of the optical paths.

公开(公告)号：US20240329247A1

公开(公告)日：2024-10-03

申请号：US18744333

申请日：2024-06-14

Applicant: DENSO CORPORATION

Inventor： Yuichi TOYOTA ,  Taro BEPPU ,  Chihiro MORIGUCHI ,  Naoki YOSHIMOTO ,  Hiroyuki MATSUBARA ,  Tatsuya YAMASHITA ,  Tadashi ICHIKAWA

IPC: G01S17/42 ,  G01S7/4911

CPC classification number: G01S17/42 ,  G01S7/4911

Abstract: A laser radar device includes a transmission unit, a scanning unit, a distance calculation section, and a movement control unit. The transmission unit transmits laser light that has been subjected to frequency modulation. The scanning unit performs scanning with the laser light. For each of a plurality of partial regions obtained by dividing a laser light scanning region preset as a two-dimensional region which the scanning unit scans with the laser light, the distance calculation section receives the laser light that has been reflected by an object, and calculates a distance to the object in the partial region. The movement control unit controls movement of the laser light so that the laser light moves in the partial region, with Δθ>(1.22*λ/d) being met.

公开(公告)号：US20210261044A1

公开(公告)日：2021-08-26

申请号：US17318844

申请日：2021-05-12

Applicant: DENSO CORPORATION

Inventor： Taro BEPPU ,  Naoki YOSHIMOTO

IPC: B60Q1/00 ,  G01S17/86 ,  B60Q1/14

Abstract: A combined radar and lighting unit includes a laser radar apparatus, a lighting device, and a controller. The laser radar apparatus is mounted to a vehicle, emits laser light toward an outside of the vehicle, and detects reflected light. The lighting device is mounted to the vehicle and emits visible light toward the outside of the vehicle. The controller controls the lighting device to cause the lighting device to alternately operate in a first emission mode to perform emission of the visible light, and in a second emission mode to stop emission of the visible light or reduce a quantity of the visible light. The controller controls the laser radar apparatus to interrupt the measurement of the distance while the lighting device is operating in the first emission mode, and executes the measurement of the distance while the lighting device is operating in the second emission mode.