Ji Yeon Chung

20210208259, Jul 8, 2021

Jan 4, 2021

17/140141

- San Jose CA, US
Ji Yoon CHUNG - San Jose CA, US

G01S 7/487
G01S 7/48

A method for noise filtering for LiDAR. The method comprises: receiving a scanned points data indicative of an environment obtained by emitting light pulses from a sensor of a vehicle into the environment where the vehicle is driving; obtaining an object region by grouping together a set of connected points within a road region representing a road surface in the environment generated based on the scanned points data, wherein each of the set of connected points comprises a non-road reflection data indicative of a reflective position not located on the road surface; acquiring one or more noise evaluation features of the object region, wherein the one or more noise evaluation features comprise whether the object region comprises at least one dual-reflection point all surrounded by other dual-reflection points; determining whether the non-road reflection data of all points within the object region are noisy data based on the one or more noise evaluation features.

20210048532, Feb 18, 2021

Aug 12, 2020

16/992078

- San Jose CA, US
Ji Yoon CHUNG - San Jose CA, US

G01S 17/931
G01S 7/481
G01S 7/48

An optical system, a method and an apparatus for diagnosing the optical system are provided. The optical system includes a laser sensor, and a tubular sleeve surrounding the laser sensor and configured to move upwards or downwards relative to the laser sensor to cover or expose the laser sensor. The method includes: driving the tubular sleeve to cover the laser sensor to form an enclosed chamber; filling the enclosed chamber with fluid; controlling at least one of the one or more transmitters to emit an optical signal into the fluid; controlling at least one of the one or more receivers to detect a scattered signal of the optical signal; determining whether the at least one of the one or more transmitters or the at least one of the one or more receivers has a fault based on the scattered signal.

20210018596, Jan 21, 2021

Jul 20, 2020

16/932845

- Sunnyvale CA, US
Ji Yoon CHUNG - Sunnyvale CA, US

G01S 7/48
G01S 17/10

An object identifying method is provided. The method comprises: acquiring detection data associated with a detection signal, wherein the detection data comprises a transmission time of the detection signal transmitted by a LiDAR device; acquiring reflection data associated with a reflection signal of the detection signal reflected by an object at an object distance from the LiDAR device, and the reflection data comprises a receipt time of the reflection signal and an intensity of the reflection signal; and determining whether the object is an interference by comparing the intensity of the reflection signal with a distance-dependent threshold intensity.

20200386860, Dec 10, 2020

Jun 3, 2020

16/891073

- Sunnyvale CA, US
Ji Yoon CHUNG - Sunnyvale CA, US

G01S 7/481
G01S 17/931

A mounting base for sensor is provided. The mounting base comprises: a body having a top surface; a mounting portion located on the top surface of the body, the mounting portion is configured for mounting a sensor; and at least one airflow generating component, the airflow generating component is configured for forming at least one airflow on a side of the sensor mounted on the mounting portion.