公开(公告)号：US11979669B2

公开(公告)日：2024-05-07

申请号：US17108034

申请日：2020-12-01

申请人： Murata Manufacturing Co., Ltd.

发明人： Noritaka Kishi ,  Hitoshi Sakaguchi ,  Masaaki Takata ,  Masaru Amano ,  Takaaki Mori

IPC分类号： H04N5/217 ,  B08B3/12 ,  B08B7/00 ,  G02B27/00 ,  H04N23/81 ,  B08B3/04

CPC分类号： H04N23/811 ,  B08B3/12 ,  B08B7/0028 ,  G02B27/0006 ,  B08B3/041

摘要： In a cleaning device, a signal processing circuit determines that a foreign substance has adhered to a surface of a protection cover based on at least two pieces of information among a change amount of a resonant frequency when a vibration portion is driven at a first voltage, a change amount of a current value relating to an impedance detected by an impedance detector, and a temporal change of an image captured by an imaging portion, and cleans the surface of the protection cover by controlling the vibration portion in accordance with the determination.

公开(公告)号：US12115947B2

公开(公告)日：2024-10-15

申请号：US17574612

申请日：2022-01-13

申请人： Murata Manufacturing Co., Ltd.

发明人： Masaaki Takata ,  Yuzo Mizushima ,  Takaaki Mori

IPC分类号： B06B1/06 ,  B08B3/02 ,  B08B13/00 ,  B60S1/52 ,  B60S1/56 ,  G02B27/00 ,  H04N23/50 ,  H04N23/51 ,  H04N23/52 ,  H04N23/55 ,  H04N23/60

CPC分类号： B60S1/52 ,  B06B1/0644 ,  B08B3/02 ,  B08B13/00 ,  B60S1/56 ,  G02B27/0006 ,  H04N23/50 ,  H04N23/51 ,  H04N23/52 ,  H04N23/55 ,  H04N23/60

摘要： A cleaning device includes a protection cover in a viewing field of a camera, a piezoelectric material to vibrate the protection cover, a driver to drive the piezoelectric material, a vibrator to detect a signal related to a vibration level of the protection cover vibrated with the piezoelectric material, and a controller to control the driver based on a signal detected by the vibration sensor so that the signal detected by the vibrator matches a predetermined target value of the vibration level of the protection cover.

公开(公告)号：US11904367B2

公开(公告)日：2024-02-20

申请号：US17399164

申请日：2021-08-11

申请人： Murata Manufacturing Co., Ltd.

发明人： Takaaki Mori

IPC分类号： B08B3/12 ,  B08B3/02 ,  B08B13/00 ,  G02B27/00

CPC分类号： B08B3/12 ,  B08B3/02 ,  B08B13/00 ,  G02B27/0006

摘要： A cleaning apparatus includes an imaging section, a protective cover in a field of view of the imaging section, a vibrator to vibrate the protective cover, a piezoelectric driver to drive the vibrator, a cleaning liquid discharger to discharge a cleaner onto a surface of the protective cover, and a signal processing circuit to control the piezoelectric driver. The signal processing circuit controls the piezoelectric driver such that the protective cover is vibrated at a resonant frequency for a predetermined period after the cleaning liquid is caused to be discharged and controls the piezoelectric driver such that, after the predetermined period, vibration of the protective cover is stopped or the protective cover is vibrated at a frequency other than the resonant frequency.