公开(公告)号：US20200064451A1

公开(公告)日：2020-02-27

申请号：US16543664

申请日：2019-08-19

Applicant: OMRON Corporation ,  Politecnico di Milano

Inventor： Yuki MATSUI ,  Ken NAKAMURO ,  Franco ZAPPA ,  Federica VILLA ,  Rudi LUSSANA

IPC: G01S7/487

Abstract: A distance measuring device includes a light emission portion for emitting light; a light receiving portion for receiving measurement light that is emitted by the light emission portion and reflected by a measurement object, the light receiving portion comprising a plurality of pixels, each pixel having at least one light receiving portion and outputting a light reception signal that depends on the measurement light incident on the pixel; a discrimination portion for discriminating whether the pixel receives measurement light; a pixel output control portion for selectively outputting the light reception signal of each pixel individually, depending on the determination result of the discrimination portion; and an evaluation portion for receiving the light reception signals output by the pixel output control portion and outputting a distance signal that is indicative of a distance between the measuring device and the measurement object based on these light reception signals.

公开(公告)号：US20240175748A1

公开(公告)日：2024-05-30

申请号：US18551270

申请日：2022-03-18

Applicant: POLITECNICO DI MILANO

Inventor： Federica Alberta VILLA ,  Franco ZAPPA ,  Fabio SEVERINI ,  Francesca MADONINI ,  Danilo BRONZI

IPC: G01J1/44

CPC classification number: G01J1/44 ,  G01J2001/4466

Abstract: A system and method for detection, localization and signaling of single photon events and of at least two photons time coincidence events. The system includes at least one array of pixels, each of which includes a photodetector and a front-end electronics, which outputs a digital signal; at least one event detection electronics including: a plurality of digital-to-analog transducers, one for each pixel of the array, configured to convert the digital signal coming from the respective pixel in a corresponding analog signal, which is quantized in amplitude and duration; an analog adder node configured to sum the analog signals coming from the digital-to-analog transducers, obtaining a sum analog signal; and an overall analog-to-digital transducer. The system and method are ultimately configured to output a digital signal if an output signal of an analog adder node exceeds, respectively, a first threshold or the second threshold, allowing event detection, within a time window.

公开(公告)号：US20240361437A1

公开(公告)日：2024-10-31

申请号：US18768697

申请日：2024-07-10

Applicant: HUAWEI TECHNOLOGIES CO., LTD. ,  POLITECNICO DI MILANO

Inventor： Alfonso INCORONATO ,  Klaus PASQUINELLI ,  Mauro LOCATELLI ,  Franco ZAPPA ,  Ali Ahmed Ali MASSOUD ,  Haitao SUN ,  Hongbiao GAO ,  Li ZENG

IPC: G01S7/487 ,  G01S7/4863 ,  G01S7/4865 ,  G01S17/10

CPC classification number: G01S7/487 ,  G01S7/4863 ,  G01S7/4865 ,  G01S17/10

Abstract: There is provided a method and device for time-of-flight (TOF) ranging. The method includes generating, by each photon detector in a photon detector array, a quantized current pulse each time a predefined number of photons is detected. The method further includes summing, by a current adder, the quantized current pulses from all photon detectors to create an analog signal pulse. The method further includes providing, by a peak detector, a digital pulse for each instance where an intensity of the analog signal pulse is greater than signal peaks already measured after the last emitted pulsed laser shot. The method further includes measuring and recording, by a time-to-digital converter (TDC), a TOF each time the digital pulse is provided. The method further includes providing, by a TOF output, a single TDC result indicative of a TOF associated with the analog signal pulse having a highest intensity. The device includes a photon detector, current adder, analog peak detector and a time-of-flight digital converter, wherein each component is configured to perform the respective aspect of the method.

公开(公告)号：US20200049822A1

公开(公告)日：2020-02-13

申请号：US16535126

申请日：2019-08-08

Applicant: OMRON Corporation ,  Politecnico di Milano

Inventor： Yuki MATSUI ,  Ken NAKAMURO ,  Franco ZAPPA ,  Federica VILLA ,  Rudi LUSSANA

IPC: G01S17/10 ,  G01S7/486 ,  H01L27/146

Abstract: A distance measuring device includes a light emission portion configured to emit light; a light receiving portion configured to receive measurement light that is emitted by the light emission portion and reflected by the measurement object, the light receiving portion comprising a plurality of pixels configured to output light reception signals that depend on the received measurement light; a plurality of determination portions configured to receive the light reception signals and to determine characteristic values from the received light reception signals, and an evaluation portion that is connected to the plurality of determination portions, the evaluation portion being configured to calculate a distance from the characteristic values determined by the determination portions. Each of the plurality of determination portions is configured to receive the light reception signals only from a plurality of non-adjacent pixels.