Adaptive LiDAR system

Patent metadata

Field	Value
Publication number	US-11662445-B2
Application number	US-201916422761-A
Country	US
Kind code	B2
Filing date	May 24, 2019
Priority date	May 25, 2018
Publication date	May 30, 2023
Grant date	May 30, 2023

Abstract

In one embodiment, a computing system may transmit, using one or more light emitters, light beams of different wavelengths simultaneously into a surrounding environment. The system may determine a characteristic of the surrounding environment based on reflections of the light beams. In response to a determinization that the characteristic of the surrounding environment satisfies a criterion, the system may configure the one or more light emitters to transmit light beams of different wavelengths sequentially into the surrounding environment for measuring distances to one or more objects in the surrounding environment.

First claim

What is claimed is:

1. A method comprising, by a computing system:
transmitting, using one or more light emitters, light beams of different wavelengths simultaneously into a surrounding environment;
determining a characteristic of the surrounding environment based on reflections of the light beams; and
in response to a determination that the characteristic of the surrounding environment meets a threshold, configuring the one or more light emitters to transmit light beams of different wavelengths sequentially into the surrounding environment for measuring distances to one or more objects in the surrounding environment, wherein the characteristic meets the threshold when the characteristic is above the threshold.

2. The method of claim 1 , wherein the threshold comprises a characteristic signature associated with an environmental baseline status, further comprising:
in response to the determination that the characteristic of the surrounding environment deviates from the characteristic signature for a threshold range, measuring the distances to the one or more objects in the surrounding environment based on the reflections of the light beams of different wavelengths that are simultaneously transmitted into the surrounding environment.

3. The method of claim 2 , wherein a measurement based on the reflections of the light beams of the different wavelengths that are simultaneously transmitted into the surrounding environment has a higher confidence level than the measurement based on the reflections of the light beams of the different wavelengths that are sequentially transmitted into the surrounding environment.

4. The method of claim 1 , wherein the light beams of different wavelengths that are simultaneously transmitted into the surrounding environment are transmitted into the surrounding environment along a same direction.

5. The method of claim 1 , wherein the characteristic of the surrounding environment comprises a light penetration characteristic at one or more wavelengths.

6. The method of claim 5 , wherein the light penetration characteristic is determined by comparing light penetration rates of different wavelengths.

7. The method of claim 1 , further comprising:
determining that a change of one or more environmental factors satisfies a change threshold;
in response to the determination that the change of the one or more environmental factors satisfies the change threshold, configuring the one or more light emitters to transmit light beams of different wavelengths simultaneously into the surrounding environment to determine the characteristic of the surrounding environment; and
determining whether to configure the one or more light emitters to transmit light beams of different wavelengths simultaneously or sequentially for measuring distances to the one or more objects in the surrounding environment based on the characteristic of the surrounding environment.

8. The method of claim 7 , wherein the one or more environmental factors comprise one or more of:
environmental humidity;
environmental temperature;
atmosphere pressure;
a raining weather condition;
a sunny weather condition;
a cloudy weather condition;
a foggy weather condition;
a road condition;
a number of obstacles in the surrounding environment;
a nearby lake;
a nearby spring;
a sprinkler truck;
a solar light intensity;
an exhaust plume;
a dust cloud; or
a particle density in air.

9. The method of claim 7 , further comprising:
determining the one or more environmental factors based on one or more of:
a sensor associated with the computing system;
a communication from a second computing system;
a current location;
a navigation map;
a weather forecast;
a user operation; or a user input.

10. The method of claim 1 , further comprising:
determining that an operational condition of the computing system meets an operational threshold;
in response to the determination that the operational condition meets an operational threshold, configuring the one or more light emitters to transmit light beams of different wavelengths simultaneously into the surrounding environment to determine the characteristic of the surrounding environment; and
determining whether to configure the one or more light emitters to transmit light beams of different wavelengths simultaneously or sequentially for measuring distances to the one or more objects in the surrounding environment based on the characteristic of the surrounding environment.

11. The method of claim 10 , wherein the operational condition comprises on one or more of:
a value of one or more performance metrics being below a threshold value;
a deviation of one or more performance metrics from a reference value above a threshold range;
a trend of one or more performance metrics satisfying a trend criterion;
a time associated with a pre-determined schedule;
a need to increase one or more performance aspects; or
a user operation input.

12. The method of claim 11 , wherein the one or more performance metrics comprise one or more of:
a measurement of confidence level;
a spatial measurement resolution;
a signal-to-noise ratio (SNR);
a measurement accuracy;
a measurement precision;
a noise level;
a signal amplitude;
a detectable field of view;
a detectable distance;
a detectable range; or
a signal degradation metric.

13. A system comprising: one or more processors and one or more computer-readable non-transitory storage media coupled to one or more of the processors, the one or more computer-readable non-transitory storage media comprising instructions operable when executed by one or more of the processors to cause the system to:
transmit, using one or more light emitters, light beams of different wavelengths simultaneously into a surrounding environment;
determine a characteristic of the surrounding environment based on reflections of the light beams; and
in response to a determination that the characteristic of the surrounding environment meets a threshold, configure the one or more light emitters to transmit light beams of different wavelengths sequentially into the surrounding environment for measuring distances to one or more objects in the surrounding environment, wherein the characteristic meets the threshold when the characteristic is above the threshold.

14. The system of claim 13 , wherein the threshold comprise a characteristic signature associated with an environmental baseline status, further comprising:
in response to the determination that the characteristic of the surrounding environment deviates from the characteristic signature for a threshold range, measuring the distances to the one or more objects in the surrounding environment based on the reflections of the light beams of different wavelengths that are simultaneously transmitted into the surrounding environment.

15. The system of claim 14 , wherein a measurement based on the reflections of the light beams of the different wavelengths that are simultaneously transmitted into the surrounding environment has a higher confidence level than the measurement based on the reflections of the light beams of the different wavelengths that are sequentially transmitted into the surrounding environment.

16. The system of claim 13 , wherein the characteristic of the surrounding environment comprises a light penetration characteristic at one or more wavelengths, and wherein the light penetration characteristic is determined by comparing light penetration rates of different wavelengths.

17. One or more computer-readable non-transitory storage media

Assignees

• Woven Planet North America Inc

Inventors

• Abari Farzad Cyrus Foroughi
• Clément Romain
• Paine Roxie Lynn

Classifications

• G01S17/42 Primary

  Simultaneous measurement of distance and other co-ordinates (indirect measurement G01S17/46) · CPC title

• G01S17/931

  of land vehicles · CPC title

• G01S7/497 Primary

  Means for monitoring or calibrating · CPC title

• G01S7/484

  Transmitters · CPC title