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Polarization diversity detection for FMCW lidar

A technology of polarization and polarization direction, which is used in measurement devices, re-radiation of electromagnetic waves, radio wave measurement systems, etc., and can solve the problem of not indicating the type.

Pending Publication Date: 2022-07-01
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This detection yields the location and / or extent of the object, but does not indicate what type of object it is

Method used

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  • Polarization diversity detection for FMCW lidar
  • Polarization diversity detection for FMCW lidar
  • Polarization diversity detection for FMCW lidar

Examples

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Embodiment Construction

[0014] The following description is merely exemplary in nature and is not intended to limit the present disclosure, its application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.

[0015] According to an exemplary embodiment, figure 1 An autonomous vehicle 10 is shown. In the exemplary embodiment, autonomous vehicle 10 is a so-called level four or five automation system. Level 4 stands for "highly automated" and refers to the driving mode-specific performance of an automated driving system for all aspects of a dynamic driving task, even if a human driver does not respond appropriately to intervention requests. Level 5 stands for "full automation" and refers to the full-time performance of an automated driving system for all aspects of dynamic driving tasks under all road and environmental conditions that can be managed by a human driver. It should be understood that the syst...

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Abstract

The invention relates to a system and a method for classifying objects. The system includes a polarization beam splitter, a first detector, a second detector, and a processor. The polarizing beam splitter generates a first source signal having a first polarization direction and a second source signal having a second polarization direction. The first detector transmits a first source signal at the object and receives a first reflected signal generated at the object in response to the first source signal. A second detector transmits a second source signal at the object and receives a second reflected signal generated at the object in response to the second source signal. The processor is configured to compare the first reflected signal and the second reflected signal to classify the object.

Description

technical field [0001] The present disclosure relates to sensor systems, and more particularly, to systems and methods for classifying objects based on the polarization of signals reflected from the objects. Background technique [0002] Autonomous vehicles can employ sensors in order to locate objects in their environment. For example, light-based sensors on autonomous vehicles, such as lidar, can be used to transmit light from the vehicle. This light is reflected from the object and received back at the sensor, where parameters of the reflected light are measured and compared to similar parameters of the transmitted light. This detection can yield the location and / or extent of an object, but not what type of object it is. Accordingly, it is desirable to provide a method for operating a light sensor to determine the classification and range and location of an object. SUMMARY OF THE INVENTION [0003] In an exemplary embodiment, a method of classifying objects is disclo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/931
CPCG01S17/931G01S7/499G01S17/58G01S17/34G01S7/4813G01S7/4817G01S7/4914
Inventor T.菲利普I.比利克
Owner GM GLOBAL TECH OPERATIONS LLC