Environmentally responsive autonomous ground maintenance equipment

• US 20050034437A1
• Filed: 09/23/2004
• Published: 02/17/2005
• Est. Priority Date: 03/26/2002
• Status: Abandoned Application

• Current Assignee: McMurtry Ltd.
• Original Assignee: McMurtry Ltd.
• Inventors: McMurtry, Richard, McMurtry, Ben
• Application Number:
  US10/948,030
• Publication Number:
  US 20050034437A1
• Time in Patent Office: Days
• US Class Current: 56/1
• CPC Class Codes: A01D 2101/00 Lawn-mowers
• CPC Class Codes: A01D 34/008 for automated or remotely controlled operation
• CPC Class Codes: B60K 31/04 and means for comparing one electrical quantity, e.g. voltage, pulse, waveform, flux, or the like, with another quantity of a like kind, which comparison means is involved in the development of an electrical signal which is fed into the controlling means
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: B60W 2520/105 Longitudinal acceleration
• CPC Class Codes: B60W 2520/125 Lateral acceleration
• CPC Class Codes: B60W 2552/15 Road slope, i.e. the inclination of a road segment in the longitudinal direction
• CPC Class Codes: B60W 2555/20 Ambient conditions, e.g. wind or rain
• CPC Class Codes: B60W 2720/106 Longitudinal acceleration
• CPC Class Codes: G05D 1/0219 ensuring the processing of the whole working surface
• CPC Class Codes: G05D 1/0236 in combination with a laser lasers per se H01S

Abstract

An autonomous ground maintenance vehicle is capable of varying its operating parameters in response to environmental conditions. These operating parameters include maximum permitted acceleration, deceleration, velocity, rate of change of direction and rate of change of steering values. A rain sensor 50 and moisture sensor 51 may be mounted to the vehicle or be positioned on the ground. An inclinometer may also be provided such that the operating parameters may be varied according to the inclination of the ground to be maintained. If guidance means is provided to guide the vehicle along a specified path a variable operating parameter may be a minimum allowable specified path length.

Claims

1. Autonomous ground maintenance equipment comprising:

a vehicle for performing a ground maintenance operation; and

control means for controlling at least one operating parameter of the vehicle, the control means having input means for receiving data relating to one or more of the environmental conditions rain, soil moisture and slope whereby the operating parameter or at least one of the operating parameters is variable by the control means so as to modify operation of the vehicle during a ground maintenance operation in response to the environmental conditions.

2. Autonomous ground maintenance equipment according to claim 1, wherein the operating parameter of one of the operating parameters comprises a maximum permitted acceleration value for the equipment.

3. Autonomous ground maintenance equipment according to claim 1, wherein the operating parameter or at least one of the operating parameters comprises a maximum permitted deceleration value for the equipment.

4. Autonomous ground maintenance equipment according to claim 1, wherein the operating parameter or at least one of the operating parameters comprises a maximum permitted rate of change of direction for the equipment.

5. Autonomous ground maintenance equipment according to claim 1, wherein the operating parameter or at least one of the operating parameters comprises a maximum permitted rate of change of steering angle for the equipment.

6. Autonomous ground maintenance equipment according to claim 1, wherein the operating parameter or at least one of the operating parameters comprises a maximum permitted velocity for the equipment.

7. Autonomous ground maintenance equipment according to claim 1, wherein guidance means is provided for guiding the vehicle so as to perform a ground maintenance task along at least one specified path, wherein the operating parameter or at least one of the operating parameters comprises a minimum allowable specified path length.

8. Autonomous ground maintenance equipment according to claim 1, wherein the input means receives data from at least one sensor.

9. Autonomous ground maintenance equipment as claimed in claim 8, wherein the sensor, or one of the sensors, is a rain sensor.

10. Autonomous ground maintenance equipment as claimed in claim 8, wherein the sensor, or one of the sensors, is a soil moisture sensor.

11. Autonomous ground maintenance equipment as claimed in claim 8, wherein the sensor, or one of the sensors, is an inclinometer.

12. Autonomous ground maintenance equipment as claimed in claim 8, wherein the sensor, or at least one of the sensors, is mounted on the vehicle.

13. Autonomous ground maintenance equipment as claimed in claim 1, wherein the sensor is separate from the vehicle.

14. Autonomous ground maintenance equipment as claimed in claim 1, wherein the input means is adapted to receive the data representing the environmental conditions by manual input by an operator.

15. Autonomous ground maintenance equipment as claimed in claim 1, wherein the input means is adapted to receive data relating to environmental conditions from the Internet.

16. Autonomous ground maintenance equipment as claimed in claim 1, which is an autonomous turf maintenance vehicle.

17. Autonomous ground maintenance equipment as claimed in claim 16, wherein said turf maintenance vehicle is provided with a mower unit and a receptacle for temporarily storing mown grass.