Distributed light detection and ranging (lidar) management system

Patent metadata

Field	Value
Publication number	US-2021286079-A1
Application number	US-202117333573-A
Country	US
Kind code	A1
Filing date	May 28, 2021
Priority date	Nov 29, 2018
Publication date	Sep 16, 2021
Grant date	—

Abstract

Disclosed herein are techniques for implementing a distributed sensor (LIDAR) system with a management system (e.g., a controller) that controls and interfaces with multiple sensors in the distributed sensor system. A representative management system can control an operational state (e.g., power on, reset, over-current protection, etc.), an operating mode (e.g., modes corresponding to varying levels of performance), etc. The management system can combine separate outputs from the individual sensors into a combined output (e.g., point cloud). The management system can assist installation of the sensors, manage a self-test and/or a self-calibration of the sensors, or a combination thereof.

First claim

1 . A system for detecting an environment around a mobile platform, the system comprising:
a plurality of distance measurement devices, with individual distance measurement devices coupled to the mobile platform at corresponding different locations, wherein the individual distance measurement devices are configured to generate corresponding individual distance measurement data sets representative of distances between the mobile platform and features of the environment; and a controller coupled to the plurality of distance measurement devices, wherein the controller comprises an interface to an external computing device, and wherein the controller is configured to:
receive the individual distance measurement data sets from the plurality of distance measurement devices,
calculate, based on the individual distance measurement data sets, a combined distance measurement data set representative of at least a portion of the environment around the mobile platform,
communicate the combined distance measurement data set to the external computing device via the interface,
receive status data from at least one distance measurement device, wherein the status data comprises one or more of power data or error data for the at least one distance measurement device,
transmit a control signal in response to the status data,
receive context data indicative of a state of one or more of the mobile platform or the environment, and
transmit a mode switch signal to the plurality of distance measurement devices in response to the context data, wherein the mode switch signal causes the plurality of distance measurement devices to operate according to an operating mode.

2 . The system of claim 1 , wherein the controller includes a printed circuit board.

3 . A system for detecting an environment around a mobile platform, the system comprising:
a plurality of distance measurement devices, with individual distance measurement devices coupled to the mobile platform at corresponding different locations, wherein the individual distance measurement devices are configured to generate corresponding individual distance measurement data sets representative of distances between the mobile platform and features of the environment; and a controller coupled to the plurality of distance measurement devices, wherein the controller includes:
a printed circuit board,
a control hub attached to the printed circuit board and operably coupled to the plurality of distance measurement devices, the control hub being configured to communicate one or more control signals, one or more status data, or a combination thereof to and/or from the plurality of distance measurement devices, and
a data hub attached to the printed circuit board and operably coupled to the plurality of distance measurement devices, the data hub being configured to receive and process the individual distance measurement data sets from each of the plurality of distance measurement devices.

4 . The system of claim 3 , wherein the controller is further configured to calculate, based on the individual distance measurement data sets, a combined distance measurement data set representative of at least a portion of the environment around the mobile platform.

5 . The system of claim 4 , wherein the controller includes a common interface to communicate the combined distance measurement data set to an external computing device.

6 . The system of claim 3 , wherein the mobile platform is an unmanned vehicle, an autonomous vehicle, or a robot.

7 . The system of claim 3 , wherein the plurality of distance measurement devices comprises at least one Light Detection and Ranging (LIDAR) device.

8 . The system of claim 3 , wherein the different locations comprise two or more of: an upper portion of the mobile platform, a lower portion of the mobile platform, a front portion of the mobile platform, a rear portion of the mobile platform, a central portion of the mobile platform, or a side portion of the mobile platform.

9 . The system of claim 3 , wherein the individual distance measurement data sets comprise point cloud data.

10 . The system of claim 3 , wherein the individual distance measurement data sets comprise different individual coordinate reference frames, and wherein the controller is configured to convert the individual distance measurement data sets into a single coordinate reference frame.

11 . The system of claim 3 , wherein the combined distance measurement data set covers a larger field of view than the individual distance measurement data sets.

12 . The system of claim 3 , further comprising a power supply and a plurality of protection circuits, wherein the individual distance measurement devices are connected to the power supply via corresponding individual protection circuits.

13 . The system of claim 3 , wherein the controller is further configured to receive and process the status data including one or more of power data or error data for the plurality of distance measurement devices.

14 . The system of claim 12 , wherein the status data comprises power data, and the power data comprises a current value between the power supply and the individual distance measurement devices.

15 . The system of claim 14 , wherein if the current value exceeds a threshold value, the control signal is transmitted to the corresponding individual protection circuits to cause the corresponding individual protection circuit to disconnect the corresponding individual distance measurement device from the power supply.

16 . The system of claim 12 , wherein the status data comprises power data, and the power data comprises a voltage value at the individual distance measurement devices.

17 . The system of claim 12 , wherein the status data comprises error data, and the error data is indicative of whether the individual distance measurement devices are in an error state.

18 .- 26 . (canceled)

27 . A method for detecting an environment around a mobile platform, the method comprising:
receiving, from a plurality of distance measurement devices coupled to the mobile platform at corresponding different locations, a corresponding plurality of distance measurement data sets representative of corresponding distances between the mobile platform and features of the environment; calculating, based on the plurality of distance measurement data sets, a combined distance measurement data set representative of at least a portion of the environment around the mobile platform; receiving status data from at least one distance measurement device, wherein the status data comprises one or more of power data or error data for the at least one distance measurement device; and transmitting a control signal in response to receiving the status data.

28 . (canceled)

29 . (canceled)

30 . The method of claim 27 , wherein the plurality of distance measurement data sets comprise a corresponding plurality of different coordinate reference frames, and wherein the method further comprises converting the plurality of distance measurement data sets into a single coordinate reference frame.

31 . The method of claim 30 , further comprising:
receiving a corresponding plurality of calibration parameters for the plurality of distance measurement devices; and converting the plurality of distance measurement data sets into the single coordinate reference frame based on the plurality of calibration parameters.

32 .- 59 . (canceled)

Assignees

• Sz Dji Technology Co Ltd

Inventors

• Liu Xiang
• Hong Xiaoping
• Zhang Fu
• Chen Han
• Long Chenghui
• Feng Xiaofeng

Classifications

• G01S17/10

  using transmission of interrupted, pulse-modulated waves (determination of distance by phase measurements G01S17/32) · CPC title

• G01S17/87 Primary

  Combinations of systems using electromagnetic waves other than radio waves · CPC title

• G01S17/93 Primary

  for anti-collision purposes · CPC title

• G01S17/08

  for measuring distance only (indirect measurement G01S17/46; active triangulation systems G01S17/48) · CPC title

• G01D21/02

  Measuring two or more variables by means not covered by a single other subclass · CPC title