Lawn mower robot and method for controlling the same

Patent metadata

Field	Value
Publication number	US-2022248599-A1
Application number	US-201917626105-A
Country	US
Kind code	A1
Filing date	Nov 29, 2019
Priority date	Jul 10, 2019
Publication date	Aug 11, 2022
Grant date	—

Abstract

A lawn mower robot and a method for controlling the same are disclosed. A lawn mower robot according to an embodiment includes an image sensor module to detect image information. Incline part information related to presence or absence of the incline part and inclination information as information related to a shape of the incline part are calculated based on the detected image information. The lawn mower robot is controlled to operate according to operation information calculated based on the incline part information and the inclination information, so as to perform a task efficiently.

First claim

What is claimed is:

1 . A lawn mower robot comprising:
a body part to which a main wheel is rotatably coupled; a power module connected to the main wheel and rotated according to operation information so as to rotate the main wheel; a sensor part provided on the body part to detect external image information on one side of the body part; and a controller configured to calculate the operation information, the controller electrically connected to the power module to transfer the calculated operation information, and electrically connected to the sensor part to receive the detected image information, wherein the controller calculates the operation information using the detected image information.

2 . The lawn mower robot of claim 1 , wherein the controller calculates incline part information related to whether or not an incline part is present on a ground of the one side, using the detected image information.

3 . The lawn mower robot of claim 2 , wherein,
the controller calculates inclination information related to the incline part using the detected image information, and the inclination information comprises:
angle information related an angle between a surface of the incline part and the ground; and
extension distance information related to a distance by which the surface of the incline part extends.

4 . The lawn mower robot of claim 3 , wherein the controller calculates the operation information using the calculated incline part information and inclination information.

5 . The lawn mower robot of claim 4 , wherein the main wheel comprises:
a first main wheel located on one side of the body part; and a second main wheel located on another side of the body part, opposite to the first main wheel, the power module comprises;
a first power module connected to the first main wheel; and
a second power module connected to the second main wheel, and the operation information comprises:
first steering information for controlling a rotational speed of the first power module; and
second steering information for controlling a rotational speed of the second power module.

6 . The lawn mower robot of claim 5 , wherein the controller calculates the first steering information and the second steering information, so that the rotational speed of the first power module and the rotational speed of the second power module alternately change in magnitude.

7 . The lawn mower robot of claim 3 , wherein,
the sensor part is configured to detect tilt information related to an angle between the body part and the ground, and the controller calculates the incline part information and the inclination information using the detected tilt information.

8 . The lawn mower robot of claim 3 , wherein,
the sensor part is configured to detect rotation information related to turns of the main wheel, and the controller calculates the incline part information and the inclination information using the detected rotation information.

9 . The lawn mower robot of claim 3 , wherein,
the sensor part is configured to detect position information related to a position of the body part, and the controller calculates the incline part information and the inclination information using the detected position information.

10 . A method for controlling a lawn mower robot, the method comprising:
(a) detecting, by a sensor part, information related to an operating state of the lawn mower robot; (b) calculating, by an incline part information calculation module, information related to an external environment of the lawn mower robot using the detected information; (c) calculating, by an operation information calculation module, operation information using the calculated information related to the external environment; and (d) controlling a power module according to the calculated operation information.

11 . The method of claim 10 , wherein the step (a) comprises:
(a1) sensing, by an image sensor module, external image information related to one side of a body part of the lawn mower robot; (a2) detecting, by a position sensor module, position information related to a position of the body part; (a3) sensing, by a rotation sensor module, rotation information related to turns of a main wheel rotatably connected to the body part; and (a4) detecting, a tilt sensor module, tilt information related to an angle between the body part and a ground.

12 . The method of claim 11 , wherein the step (b) comprises:
(b1) calculating, by the incline part information calculation module, incline part information related to whether an incline part is present on the ground of the one side by a preset method, using at least one of the detected image information, position information, rotation information, and tilt information; (b2) comparing, by the incline part information calculation module, the calculated incline part information with preset reference incline part information; and (b3) calculating, by the incline part information calculation module, inclination information related to inclination of the incline part by a preset method using at least one of the detected image information, position information, rotation information, and tilt information, when a result of the comparison corresponds to a preset condition, and the preset condition corresponds to presence of the incline part on the ground of the one side.

13 . The method of claim 12 , wherein the step (c) comprises:
(c1) calculating, by a driving information calculation unit, driving information by a preset method using at least one of the calculated incline part information and inclination information; and (c2) calculating, by a steering information calculation unit, steering information by a preset method using at least one of the calculated incline part information and inclination information.

14 . The method of claim 13 , wherein the main wheel comprises:
a first main wheel located on one side of the body part; and a second main wheel located on another side of the body part, opposite to the first main wheel, the power module comprises:
a first power module connected to the first main wheel; and
a second power module connected to the second main wheel, and
the steering information calculated in the step (c1) is calculated so that a rotational speed of the first power module and a rotational speed of the second power module alternately change in magnitude.

15 . The method of claim 13 , wherein the step (d) comprises:
(d1) rotating, by a power module control unit, the power module according to the calculated steering information; and (d2) rotating, by the power module control unit, the power module according to the calculated driving information.

16 . The method of claim 15 , further comprising after the step (d):
(e) operating the power module according to preset operation information.

17 . The method of claim 16 , wherein the step (e) comprises:
(e1) detecting, by the image sensor module, the external image information related to the one side of the body part of the lawn mower robot; (e2) calculating, by the incline part information calculation module, the incline part information by a preset method using the detected image information; (e3) comparing, by the incline part information calculation module, the incline part information with reference incline part information; and (e4) controlling, by the power module control unit, the power module according to preset operation information when a result of the comparison does not correspond to the preset condition.

Assignees

• Lg Electronics Inc

Inventors

• Joo Hyungkook
• Shin Seungin
• Lee Jaehoon

Classifications

• B25J13/08

  by means of sensing devices, e.g. viewing or touching devices · CPC title

• B25J5/007

  mounted on wheels · CPC title

• A01D34/006

  Control or measuring arrangements · CPC title

• B25J11/00 Primary

  Manipulators not otherwise provided for · CPC title

• B25J19/02

  Sensing devices · CPC title