Turf-care vehicle operator presence detection

Patent metadata

Field	Value
Publication number	US-9485906-B2
Application number	US-201514642835-A
Country	US
Kind code	B2
Filing date	Mar 10, 2015
Priority date	Mar 10, 2015
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

An operator detection system for sensing the presence of an operator at an operator control station of a turf-care vehicle is provided. The system comprises at least one operator presence sensor structured and operable to sense whether an operator is present at the operator control station and a controller communicatively connected to the operator presence sensor(s). The controller structured and operable to determine whether each of the operator presence sensor(s) sense(s) that an operator is present at the operator control station, enable operation of an engine of the vehicle and at least one cutting unit of the vehicle when one or more operator presence sensor(s) sense(s) that the operator is present at the operator control station, and disable operation of the engine and at least one cutting unit when one or more operator presence sensor(s) sense(s) that the operator is not present at the operator control station.

First claim

What is claimed is:

1. An operator detection system for sensing the presence of an operator at an operator control station of a turf-care vehicle, said system comprising:
at least one operator presence sensor disposed in an operator control panel of a turf-care vehicle that is located in front of an operator control station of the vehicle, the at least one operator presence sensor structured and operable to emit a sensing field that projects into the operator control station to sense whether an operator is present at the operator control station; and
a controller communicatively connected to the at least one operator presence sensor and structured and operable to:
communicate with the at least one operator presence sensor and determine whether each of the at least one operator presence sensor senses that an operator is present at the operator control station,
enable operation of an engine of the vehicle and at least one cutting unit of the vehicle when at least one of the at least one operator presence sensor senses that the operator is present at the operator control station, and
disable operation of at least one of the engine and the at least one cutting unit when at least one of the at least one operator presence sensor senses that the operator is not present at the operator control station.

2. The system of claim 1 , wherein the controller is further communicatively connected to a parking brake sensor of the vehicle, the parking brake sensor structured and operable to communicate whether a parking brake actuator of the vehicle is in one of engaged and disengaged position, the controller further structured and operable to disable operation of the engine and the at least one cutting unit when at least one of the at least one operator presence sensor senses that the operator is not present at the operator control station and the parking brake sensor communicates that the parking brake actuator is in the disengaged position.

3. The system of claim 2 , wherein the controller is further structured and operable to disable operation of the at least one cutting unit and maintain operational enablement of the engine when at least one of the at least one operator presence sensor senses that the operator is not present at the operator control station and the parking brake sensor communicates that the parking brake actuator is in the engaged position.

4. The system of claim 1 , wherein the system comprises a plurality of operator presence sensors disposed adjacent the operator control station, and the controller is communicatively connected to each of the operator presence sensors and is structured and operable to:
communicate with each operator presence sensor and determine whether each operator presence sensor senses that an operator is present at the operator control station,
enable operation of an engine of the vehicle and at least one cutting unit of the vehicle when at least two of the operator presence sensors sense that the operator is present at the operator control station, and
disable operation of at least one of the engine and the at least one cutting unit when at least two of the operator presence sensors sense that the operator is not present at the operator control station.

5. The system of claim 1 further comprising a system status indicator device disposed on the vehicle at a location that is readily viewable by the operator and structured and operable to indicate an operational status of each of the at least one operator presence sensor.

6. The system of claim 1 , wherein the at least one operator presence sensor comprises at least one ultrasonic sensor.

7. A method for sensing the presence of an operator at an operator control station of a turf-care vehicle and controlling operation of the vehicle based on the sensed operator presence, said method comprising:
emitting and projecting a sensing field into an operator control station of a turf-car vehicle, via at least one operator presence sensor disposed in an operator control panel of the vehicle located in front of the operator control station;
sensing whether an operator is present at an operator control station of the vehicle utilizing the sensing field of at least one operator presence sensor;
monitoring the at least one operator presence sensor, via a controller communicatively connected to the at least one operator presence sensor, to determine whether each of the at least one operator presence sensor senses that an operator is present at the operator control station;
enabling, via the controller, operation of an engine of the vehicle and at least one cutting unit of the vehicle when at least one of the at least one operator presence sensor senses that the operator is present at the operator control station; and
disabling, via the controller, operation of at least one of the engine and the at least one cutting unit when at least one of the at least one operator presence sensor senses that the operator is not present at the operator control station.

8. The method of claim 7 further comprising:
monitoring a parking brake sensor of the vehicle, via the controller, to determine whether a parking brake actuator of the vehicle is in one of an engaged and disengaged position; and
disabling, via the controller, operation of the engine and the at least one cutting unit when at least one of the at least one operator presence sensor senses that the operator is not present at the operator control station and the parking brake sensor communicates that the parking brake actuator is in the disengaged position.

9. The method of claim 8 further comprising disabling operation of the at least one cutting unit and maintaining operational enablement of the engine when at least one of the at least one operator presence sensor senses that the operator is not present at the operator control station and the parking brake sensor communicates that the parking brake actuator is in the engaged position.

10. The method of claim 7 , wherein the at least one operator presence sensor comprises a plurality of operator presence sensors and wherein:
enabling, via the controller, operation of an engine of the vehicle and at least one cutting unit of the vehicle comprises enabling, via the controller, operation of an engine of the vehicle and at least one cutting unit of the vehicle when at least two of the operator presence sensors sense that the operator is present at the operator control station, and wherein
disabling, via the controller, operation of at least one of the engine and the at least one cutting unit comprises disabling, via the controller, operation of at least one of the engine and the at least one cutting unit when at least two of the operator presence sensors sense that the operator is not present at the operator control station.

11. The method of claim 7 further comprising indicating, via a system status indicator device, disposed on the vehicle at a location that is readily viewable by the operator, an operational status of each of the at least one operator presence sensor.

12. The method of claim 7 , wherein the at least one operator presence sensor comprise at least on ultrasonic sensor, and wherein sensing whether an operator is present at an operator control station comprises utilizing ultrasound waves transmitted and received by the at least one operator presence sensor to determine whether an operator is present at an operator control station.

13. An operator detection system for sensing the presence of an operator at an operator control station of a turf-care vehicle, said system comprising:
a plurality of operator presence sensors disposed adjacent an operator control station of the vehicl

Assignees

• Textron Inc
• Textron Inc

Inventors

• Pflanzer Ross Allen
• Jackson Matthew Dewane
• Harper Joseph Lowell

Classifications

• A01D34/006 Primary

  Control or measuring arrangements · CPC title

• F16P3/00

  Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body (F16P5/00 takes precedence) · CPC title

• A01D2101/00

  Lawn-mowers · CPC title

• A01B45/00

  Machines for treating meadows or lawns {, e.g. for sports grounds} · CPC title

• F16P3/141

  using sound propagation, e.g. sonar · CPC title