Logic to effectively operate cleaning system for lidar sensor of an autonomous vehicle

Patent metadata

Field	Value
Publication number	US-2023391291-A1
Application number	US-202217834610-A
Country	US
Kind code	A1
Filing date	Jun 7, 2022
Priority date	Jun 7, 2022
Publication date	Dec 7, 2023
Grant date	—

Abstract

A Lidar system, a cleaning apparatus for the Lidar system and a method of operation. The cleaning apparatus cleans a surface of the Lidar system. The cleaning apparatus includes a nozzle and a processor. The nozzle discharges a gas at a surface of the Lidar system. The processor is configured to identify a type of debris on the surface, identify a cleaning mode for cleaning the surface based on the type of debris, select a nozzle velocity of the gas from the nozzle based on the cleaning mode, and operate the nozzle to discharge the gas at the nozzle velocity.

First claim

What is claimed is:

1 . A method operating of a Lidar system, comprising:
identifying a type of debris on a surface of the Lidar system; identifying a cleaning mode for cleaning the surface based on the type of debris; and discharging a gas from a nozzle at the surface at a nozzle velocity to clean the surface, wherein the nozzle velocity is selected based on the cleaning mode.

2 . The method of claim 1 , wherein the nozzle velocity is related to a value of a skin friction coefficient at the surface, further comprising selecting the nozzle velocity to create the value for the skin friction coefficient according to the cleaning mode.

3 . The method of claim 1 , further comprising dispensing a cleaning fluid onto the surface and discharging the gas from the nozzle after the cleaning fluid has been dispensed.

4 . The method of claim 1 , further comprising obtaining an image of the surface and identifying the type of debris from the image.

5 . The method of claim 1 , further comprising obtaining an image of the surface and determining a level of cleanliness of the surface of the based on the image.

6 . The method of claim 1 , wherein the nozzle velocity for the mode is selected to perform at least one of: (i) removing the debris from the surface; (ii) moving the debris along the surface; and (iii) maintaining a cleanliness of the surface.

7 . The method of claim 1 , wherein the surface is a window through which light of the Lidar system passes.

8 . A cleaning apparatus for a Lidar system, comprising:
a nozzle for discharging a gas at a surface of the Lidar system; and a processor configured to:
identify a type of debris on the surface;
identify a cleaning mode for cleaning the surface based on the type of debris;
select a nozzle velocity of the gas from the nozzle based on the cleaning mode; and
operate the nozzle to discharge the gas at the nozzle velocity.

9 . The cleaning apparatus of claim 8 , wherein the nozzle velocity is related to a value of a skin friction coefficient at the surface and the processor is further configured to select the nozzle velocity to create the value for the skin friction coefficient according to the cleaning mode.

10 . The cleaning apparatus of claim 8 , further comprising a fluid dispenser configured to dispense a cleaning fluid onto the surface, wherein the processor is further configured to discharge the gas after the cleaning fluid has been dispensed.

11 . The cleaning apparatus of claim 8 , further comprising an imaging device for obtaining an image of the surface, wherein the processor is further configured to identify the type of debris from the image.

12 . The cleaning apparatus of claim 8 , further comprising an imaging device for obtaining an image of the surface, wherein the processor is further configured to determine a level of cleanliness of the surface from the image.

13 . The cleaning apparatus of claim 8 , wherein the nozzle velocity for the mode is selected to perform at least one of: (i) removing the debris from the surface;
(ii) moving the debris along the surface; and (iii) maintaining a cleanliness of the surface.

14 . The cleaning apparatus of claim 8 , wherein the surface is a window through which light of the Lidar system passes.

15 . A Lidar system, comprising:
a cleaning apparatus for cleaning a surface of the Lidar system, the cleaning apparatus comprising:
a nozzle for discharging a gas at the surface; and
a processor configured to:
identify a type of debris on the surface;
identify a cleaning mode for cleaning the surface based on the type of debris;
select a nozzle velocity of the gas from the nozzle based on the cleaning mode; and
operate the nozzle to discharge the gas at the nozzle velocity.

16 . The Lidar system of claim 15 , wherein the nozzle velocity is related to a value of a skin friction coefficient at the surface and the processor is further configured to select the nozzle velocity to obtain the value for the skin friction coefficient according to the cleaning mode.

17 . The Lidar system of claim 16 , further comprising a fluid dispenser configured to dispense a cleaning fluid onto the surface, wherein the processor is further configured to discharge the gas after the cleaning fluid has been dispensed.

18 . The Lidar system of claim 15 , further comprising an imaging device for obtaining an image of the surface, wherein the processor is further configured to determine a level of cleanliness of the surface of the based on the image.

19 . The Lidar system of claim 15 , wherein the nozzle velocity for the mode is selected to perform at least one of: (i) removing the debris from the surface; (ii) moving the debris along the surface; and (iii) maintaining a cleanliness of the surface.

20 . The Lidar system of claim 15 , wherein the surface is a window through which light of the Lidar system passes.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Raju Kothamasi Sumithra
• Mourou Julien P
• Ray Sudipto
• Liu Yuchuan

Classifications

• B60S1/0848 Primary

  Cleaning devices for cameras on vehicle · CPC title

• B60S1/0862

  including additional sensors (vehicle speed sensors B60S1/0896) · CPC title

• B60W60/001

  Planning or execution of driving tasks · CPC title

• B60W2420/52

  Operations & Transport · mapped topic

• B60W2555/20

  Ambient conditions, e.g. wind or rain · CPC title