Self-moving device, moving trajectory adjusting method, and computer-readable storage medium

Patent metadata

Field	Value
Publication number	US-12535819-B2
Application number	US-202318382306-A
Country	US
Kind code	B2
Filing date	Oct 20, 2023
Priority date	Apr 22, 2021
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

This application discloses a self-moving device, a method for adjusting a movement trajectory. The device includes a body, an image acquisition module, and a control circuit. The image acquisition module acquires an image in a traveling direction of the body. The control circuit fits, according to the image, a boundary corresponding to a working region in which the self-moving device is located. In response to the body moves toward the boundary and the body and the boundary meet a preset distance relationship, an angle relationship between the traveling direction of the body and the boundary is recognized according to the image, and the body is controlled to steer.

First claim

What is claimed is:

1 . A self-moving device comprising:
a body; a drive apparatus configured to drive the self-moving device according to a drive instruction to move in a working plane; an image acquisition module connected to the body and configured to continuously acquire an image of the working plane in a traveling direction of the body when the self-moving device moves; and a control circuit configured to:
recognize a feature in a current image and generate a boundary mark that maps a boundary position in the working plane and/or an obstacle mark of an obstacle position in a picture;
provide a reference line correlated with the traveling direction of the body to the picture; and
send the drive instruction according to a relative position relationship between the boundary mark and the reference line, and/or a relative position relationship between the obstacle mark and the reference line, to control a movement trajectory of the self-moving device, the reference line including a transverse reference line and a central axis reference line, wherein sending the drive instruction according to the relative position relationship between the boundary mark and the reference line and/or the relative position relationship between the obstacle mark and the reference line includes:
in response to determining that a distance between the boundary mark and the transverse reference line or a distance between the boundary mark and a reference point, the reference point being on the transverse reference line, meets a preset distance relationship, sending a drive instruction to control the body to perform a steering operation, so that a first acute angle or a right angle is formed between the central axis reference line and a first boundary portion when the steering operation starts, and a second acute angle or the right angle is formed between the central axis reference line and a second boundary portion when the steering operation is completed, wherein an intersection of the central axis reference line and the boundary mark divides the boundary mark into the first boundary portion and the second boundary portion.

2 . The self-moving device according to claim 1 , wherein:
the central axis reference line maps a projection of a central axis of the body onto the working plane; the transverse reference line maps a projection of a perpendicular of the central axis onto the working plane; and the reference line correlated with the traveling direction of the body further comprises: at least one of an edge line reference line that maps a projection of a width edge line of the body parallel to the central axis onto the working plane, and a second reference line that maps a parallel line that is located between the central axis and an edge line and is parallel to the central axis or a parallel line that is located between the central axis and an outer edge line and is parallel to the outer edge line.

3 . The self-moving device according to claim 2 , wherein the controlling the movement trajectory of the self-moving device comprises:
controlling the reference line to maintain a preset position relationship with the boundary mark during movement, to enable a movement trajectory of the body to have a consistent shape with a boundary.

4 . The self-moving device according to claim 3 , wherein the controlling the reference line to maintain the preset position relationship with the boundary mark during movement comprises:
in response to determining that the boundary mark is a straight line, controlling the reference line and the boundary mark to be parallel or coincident, and keeping a preset distance.

5 . A method for adjusting a movement trajectory of a self-moving device, the method comprising:
obtaining a continuous image of a working plane in a traveling direction of a body of the self-moving device; recognizing a feature in a current image and generating a boundary mark that maps a boundary position in the working plane and/or an obstacle mark of an obstacle position in a picture; providing a reference line correlated with the traveling direction of the body to the picture; sending a drive instruction to the self-moving device according to a relative position relationship between the boundary mark and the reference line, and/or a relative position relationship between the obstacle mark and the reference line; and controlling the movement trajectory of the self-moving device, the controlling the movement trajectory of the self-moving device including, in response to determining that the boundary mark is a corner facing outward in the traveling direction, controlling the reference line to maintain a preset position relationship with the boundary mark during movement, the controlling the reference line to maintain the preset position relationship with the boundary mark during movement including:
moving along a first edge of the corner and keeping the reference line and the first edge coincident, or parallel at a preset distance;
monitoring a distance between the self-moving device and a second edge;
in response to determining that the distance reaches a preset value, controlling the self-moving device to steer, until the reference line and the second edge are coincident, or are parallel at the preset distance; and
moving along the second edge of the corner and keeping the reference line and the second edge coincident, or parallel at the preset distance.

6 . The method according to claim 5 , wherein the reference line of the traveling direction of the body comprises:
at least one of a central axis reference line that maps a projection of a central axis of the body onto the working plane, an edge line reference line that maps a projection of a width edge line of the body parallel to the central axis onto the working plane, and a second reference line that maps a parallel line that is located between the central axis and an edge line and is parallel to the central axis or a parallel line that is located between the central axis and an outer edge line and is parallel to the outer edge line.

7 . The method according to claim 6 , further comprising: recognizing the relative position relationship according to an angle between the central axis reference line and the boundary mark.

8 . The method according to claim 6 , wherein a steering angle of the body is greater than a and is less than or equal to α+90°, and α is an acute angle or a right angle formed between the central axis reference line and the boundary mark.

9 . The method according to claim 6 , further comprising recognizing the relative position relationship according to a side that is of the central axis reference line and on which a lowest point of the boundary mark is located.

10 . The method according to claim 9 , wherein the sending the drive instruction according to the relative position relationship between the boundary mark and the reference line, and/or the relative position relationship between the obstacle mark and the reference line including:
in response to a lowest point of the boundary mark is located on a left side of the central axis reference line, sending a drive instruction for controlling the body to rotate clockwise; and in response to the lowest point of the boundary mark is located on a right side of the central axis reference line, sending a control instruction for controlling the body to rotate counterclockwise.

11 . The method according to claim 6 , wherein the sending the drive instruction according to the relative position relationship between the boundary mark and the reference line, and/or the relative position relationship between the obstacle mark and the reference line including:
in response

Assignees

• Positec Power Tools Suzhou Co Ltd

Inventors

• Andriolo Paolo

Classifications

• G05D1/0274

  using mapping information stored in a memory device (navigation using map-matching G01C21/30) · CPC title

• G05D1/0246 Primary

  using a video camera in combination with image processing means · CPC title

• G05D1/243 Primary

  Means capturing signals occurring naturally from the environment, e.g. ambient optical, acoustic, gravitational or magnetic signals (using passive navigation aids external to the vehicle G05D1/244; using signals from positioning sensors located off-board the vehicle G05D1/249) · CPC title

• G05D1/6484

  by taking into account parameters or characteristics of the working area or space, e.g. size or shape · CPC title

• G05D1/622

  Obstacle avoidance (predicting or avoiding probable or impending collision of road vehicles B60W30/08) · CPC title