公开(公告)号：US20220003853A1

公开(公告)日：2022-01-06

申请号：US17478731

申请日：2021-09-17

Applicant: DENSO CORPORATION

Inventor： Noriyuki OZAKI ,  Masato RINNAI ,  Takehiro HATA

IPC: G01S7/497 ,  G01S7/48 ,  G01S17/08

Abstract: A distance measuring device includes a light receiving unit and a light emitting unit. The light receiving unit includes light-receiving regions for receiving incident light and receives the incident light in units of each light-receiving region. The light emitting unit exclusively emits detection light corresponding to each light-receiving region. The distance measuring device further includes a malfunction determining unit that, in response to the light receiving unit receiving the incident light according to the emission of the detection light, performs malfunction determination in the distance measuring device, in accordance with a difference between a property of incident light intensity in a light-receiving subject region and a property of incident light intensity in a light-receiving non-subject region, the light-receiving subject region corresponding to exclusive emission of the detection light and the light-receiving non-subject region failing to correspond to exclusive emission of the detection light, among the light-receiving regions.

公开(公告)号：US20210088663A1

公开(公告)日：2021-03-25

申请号：US17110339

申请日：2020-12-03

Applicant: DENSO CORPORATION

Inventor： Masato RINNAI ,  Isamu TAKAI

IPC: G01S17/42 ,  G01S17/931 ,  G01S7/486 ,  G01S7/484

Abstract: In an optical distance measuring device detecting a distance to an object, a light source is driven at a predetermined timing, and light from the light source is emitted to a predetermined range of a space, and reflected light corresponding to the emitted light is detected by at least one light receiving element. A detection signal corresponding to the reflected light is processed, and an SPAD calculation unit extracts a peak signal corresponding to the reflected light from an object. At this time, the distance to the object is measured according to the time from driving of the light source by an emission unit until output of a peak signal. At this time, performance for measurement of the distance to the object is changed depending on the state of the peak signal. This makes sensitivity appropriate when the distance to the object is optically detected.