Self-moving device, method for providing alarm about positioning fault in same, self-moving device, and automatic working system

Patent metadata

Field	Value
Publication number	US-11442448-B2
Application number	US-201916442442-A
Country	US
Kind code	B2
Filing date	Jun 14, 2019
Priority date	Dec 15, 2016
Publication date	Sep 13, 2022
Grant date	Sep 13, 2022

Abstract

The invention relates to a method for providing an alarm about a positioning fault in a self-moving device. A self-moving device is configured to autonomously move, based on positioning of the self-moving device, inside a working region defined on a map. The method includes: receiving positioning data from a satellite positioning system to locate the self-moving device; detecting whether a positioning fault occurs in the self-moving device; and in response to a detected positioning fault that occurs in the self-moving device, providing an alarm about the positioning fault.

First claim

What is claimed is:

1. A method for an automatic working system, the method including:
receiving, by a mobile station, a signal from a first antenna of the mobile station, the signal including a first signal of a satellite;
determining, by the mobile station, position information of one or more positions of a self-moving device inside or outside of a working region based on the signal;
controlling, by a control unit of the self-moving device, a movement of the self-moving device based on the position information;
determining, by the mobile station, a quality of the signal received by the first antenna;
determining, by the mobile station, an indication manner of a first indication module of the mobile station based on the quality of the signal received by the first antenna;
acquiring, by the mobile station, a differential signal sent by a base station;
determining, by the mobile station, a movement of the base station based on a state of the mobile station, the differential signal, and the first signal of a satellite,
wherein the determining the movement of the base station includes:
calculating, by the mobile station, a calculated position of the mobile station at a current time point according to the differential signal and the first signal of a satellite; and
determining, by the mobile station, whether the mobile station is in a stationary state based on an output value of a first displacement sensor of the mobile station;
when the mobile station is in the stationary state, determining, by the mobile station, whether the calculated position at the current time point is consistent with a calculated position at a previous time point; and
when the calculated position at the current time point is not consistent with the calculated position at the previous time point, generating, by the first indication module, an indication of movement of the base station.

2. The state detection method according to claim 1 , wherein the determining, by the mobile station, the quality of the signal received by the first antenna includes:
determining, by the mobile station, the quality of the signal received by the first antenna based on a parameter of the first signal of a satellite received by the first antenna, the parameter of the first signal of a satellite including a number of satellite signals received and a signal-to-noise ratio of each of the number of satellite signals received.

3. The method according to claim 1 , further including:
receiving, by the mobile station, an output from an attitude sensor disposed on the first antenna;
determining, by the mobile station, a state of a current attitude of the first antenna based on the output from the attitude sensor; and
upon determining the state of the current attitude of the first antenna being abnormal, generating, by the first indication module, an indication of the attitude of the first antenna being incorrect.

4. The method according to claim 1 , further including:
determining, by the mobile station, the first antenna being obstructed based on an output value of a first contact sensor disposed on a receiving surface of the first antenna; and
upon determining the first antenna being obstructed, generating, by the first indication module, an indication of the first antenna being obstructed.

5. The method according to claim 1 , further including:
generating, by the mobile station, an indication of whether an attitude of holding a handle portion of the mobile station is correct, the handle portion being configured to assist a user in keeping the first antenna in a correct attitude.

6. The method according to claim 5 , further including:
before generating the indication of whether the attitude of the holding portion of the mobile station is correct and when the handle is being held by the user, determining, by the mobile station, whether the attitude of the antenna is correct based on an output value of a second contact sensor disposed at the handle portion.

7. The method according to claim 1 , further including:
generating, by the first indication module, an indication of remaining power of an energy source module of the mobile station.

8. The method according to claim 1 , wherein the determining an indication manner of the first indication module includes:
determining a display manner of the first indication module;
determining a vibration manner of the first indication module;
determining voice content of the first indication module; or
determining content sent to a terminal by using the first indication module.

9. The method according to claim 1 , further including:
upon determining the quality of the signal on the first antenna satisfies a preset condition at one or more positions, determining, by the mobile station, a fixing position of a charging station or the base station at the one or more positions.

10. The method according to claim 1 , further including:
generating, by the mobile station, a map according to the first signal of a satellite received by the first antenna; and
upon determining the quality of the signal received by the first antenna, marking, by the mobile station, map information at one or more positions based on the quality of the signal received by the first antenna.

11. The method according to claim 1 , further including:
acquiring, by a communications module of the mobile station, a state of the signal at a current position and/or time; and
determining, by the mobile station, a working state of the communications module at the current position based on the state of the signal acquired by the communication module, or
determining, by the communication module, a working state of a peer end in communication connection with the mobile station.

12. The method according to claim 11 , further including:
connecting, by the communications module, the mobile station to a terminal; and
sending, by the mobile station, the working state of the mobile station at the current position to the terminal.

13. The method according to claim 1 , further including:
generating, by a second indication module of the base station, a quality of a signal received by a second antenna of the base station, the second antenna being configured to receive a second signal, the second signal including a second signal of a satellite.

14. The method according to claim 13 , further including:
when the base station determines that the base station has moved, generating, by the second indication module, an indication that the base station has moved.

15. The method according to claim 1 , further comprising:
determining whether a positioning fault of the self-moving device has occurred based on a failure to determine the position of the self-moving device; and
in response to determining the positioning fault, controlling the self-moving device to stop.

16. The method according to claim 1 , further comprising:
in response to failing to determine a position of the self-moving device at a predetermined accuracy level, determining a time point before a positioning fault occurred in the self-moving device;
acquiring positioning data at the time point; and
locating, based on a predetermined positioning fault handling strategy, the self-moving device by using the positioning data.

17. A mobile station configured to move and work inside a working region defined on a map, including:
a first antenna configured to receive a signal and a differential signal sent by a base station, the signal including a signal of a satellite;
a first indication module coupled to the first antenna;
a displacement s

Assignees

• Positec Power Tools Suzhou Co Ltd

Inventors

• He Mingming
• Shao Yong
• Zhou Chang
• Tan Yiyun
• Liu Fangshi
• Jiao Shiping

Classifications

• G01S19/48

  by combining or switching between position solutions derived from the satellite radio beacon positioning system and position solutions derived from a further system · CPC title

• A01D2101/00

  Lawn-mowers · CPC title

• G01S19/35

  Constructional details or hardware or software details of the signal processing chain · CPC title

• G06Q10/04

  Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem" (market predictions or forecasting for commercial activities G06Q30/0202) · CPC title

• G01S19/071

  DGPS corrections · CPC title