公开(公告)号：US20230152434A1

公开(公告)日：2023-05-18

申请号：US17987304

申请日：2022-11-15

Applicant: InvenSense, Inc.

Inventor： Daniela HALL ,  Tony LEI ,  Zhongyang LI ,  Joe YOUSSEF

IPC: G01S7/521 ,  G01S15/931 ,  B06B1/02

CPC classification number: G01S7/521 ,  G01S15/931 ,  B06B1/0261

Abstract: A robotic cleaning appliance includes a housing to which is coupled a surface treatment item and a sensor assembly with first and second transducers and an acoustic interface. The first sonic transducer transmits sonic signals through an acoustic interface and out of a first acoustic opening toward a surface beneath the robotic cleaning appliance. The sonic signals reflect from the surface as corresponding returned signals received by the second sonic transducer via a second acoustic opening port of the acoustic interface. A first annular ring is defined around the first acoustic opening port and a second annular rings is defined around the second acoustic opening port. The annular ring attenuate direct path echoes between the acoustic opening ports. The first and second acoustic opening ports are coupled the first and sonic transducers, respectively, via first and second horns; and the horns are tilted from orthogonal with the surface.