Power equipment with inertia based measurement and guidance

Patent metadata

Field	Value
Publication number	US-10668545-B2
Application number	US-201414763177-A
Country	US
Kind code	B2
Filing date	Jan 30, 2014
Priority date	Feb 1, 2013
Publication date	Jun 2, 2020
Grant date	Jun 2, 2020

Abstract

An outdoor power tool may include an engine, a working assembly that performs a cutting operation powered by the engine, movement sensor circuitry configured to at least determine movement information of the outdoor power tool using inertia based measurements locally determined at the outdoor power tool, and a position monitoring module including processing circuitry configured to receive the movement information and receive an input defining a reference point. The position monitoring module may be further configured to provide feedback to an operator of the outdoor power tool to direct operation of the outdoor power tool based on the movement information.

First claim

That which is claimed:

1. An outdoor power tool comprising:
an engine;
a working assembly that performs a cutting operation powered by the engine;
movement sensor circuitry configured to at least determine movement information of the outdoor power tool using inertia based measurements locally determined at the outdoor power tool; and
a position monitoring module including processing circuitry configured to:
receive the movement information and receive an input from the outdoor power tool defining a reference point relative to an object to be cut, and
provide, based on the movement information, feedback to an operator of the outdoor power tool in response to movement of the outdoor power tool a predetermined distance from the reference point along the object to be cut,

wherein the object to be cut is a workpiece to be cut.

2. The outdoor power tool of claim 1 , further comprising a feedback indicator disposed on a casing of the outdoor power tool to provide feedback to the operator.

3. The outdoor power tool of claim 2 , wherein the feedback indicator includes one or more lights to provide visual feedback.

4. The outdoor power tool of claim 2 , wherein the feedback indicator includes a speaker to provide audible feedback.

5. The outdoor power tool of claim 2 , wherein the feedback indicator provides tactile feedback, the tactile feedback comprising mechanical pulses.

6. The outdoor power tool of claim 1 , wherein the feedback is provided to the operator based on a comparison of the movement to a stored program.

7. The outdoor power tool of claim 6 , wherein the stored program is downloaded wirelessly to the outdoor power tool or is downloaded to the outdoor power tool from a removable memory device.

8. The outdoor power tool of claim 1 , wherein the engine is electrically powered or gas powered.

9. The outdoor power tool of claim 1 , wherein the feedback is provided responsive to lateral movement of the outdoor power tool the predetermined distance from the reference point.

10. The outdoor power tool of claim 1 , wherein actuation of a measurement trigger indicates a location of the reference point.

11. The outdoor power tool of claim 1 , further comprising a measurement trigger disposed on a casing of the outdoor power tool, and wherein in response to an actuation of the measurement trigger, the position monitoring module is configured to receive an input defining the reference point.

12. The outdoor power tool of claim 1 , wherein the feedback is provided responsive to lateral movement of the outdoor power tool and the feedback is indicative of a change in elevation of the outdoor power tool relative to an elevation of the reference point.

13. The outdoor power tool of claim 1 , wherein the feedback is provided responsive to lateral movement of the outdoor power tool toward a point located the predetermined distance from the reference point, and
wherein the feedback is indicative of a proximity of the outdoor power tool to the point or the feedback provides a series of audible beeps that increase in frequency as proximity of the outdoor power tool to the point decreases.

14. The outdoor power tool of claim 1 , wherein the feedback is provided responsive to the movement of the outdoor power tool toward a point located the predetermined distance from the reference point, and wherein the feedback provides a series of visible flashes that increase in frequency as proximity of the outdoor power tool to the point decreases.

15. The outdoor power tool of claim 1 , wherein receiving the input defining the reference point comprises detecting operational parameters indicative of a trigger operation.

16. The outdoor power tool of claim 1 , wherein the position monitoring module employs real time kinematic (RTK)-global position system (GPS) navigation.

Assignees

• Husqvarna Ab

Inventors

• Willgert Mikael

Classifications

• B25F5/00

  Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for · CPC title

• B27B17/00

  Chain saws; Equipment therefor {(slotting or mortising machines equipped with chain cutters B27F5/06)} · CPC title

• B23D59/001 Primary

  Measuring or control devices, e.g. for automatic control of work feed pressure on band saw blade (measuring in general G01; controlling in general G05) · CPC title

• B27B17/0025

  Length measuring devices incorporated in the chain saw · CPC title

• B23D59/002

  for the position of the saw blade (mounting for swiveling or tilting a circular saw blade B27B5/36; portable power-driven circular saws with adjustment for cutting depth or amount of tilting B27B9/02) · CPC title