Lawn-mower with sensor
First Claim
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1. Lawn-mower (1) comprising:
- a motor-drive (2),a cutting device (3),a presence sensor (4) for detecting a presence of an external mass within a predetermined distance which is greater than or equal to zero,a grass sensor for detecting regions of grass having a surface height that is indicative of an uncut region of grass that has not already been cut, andmeans for operating said lawn-mower (1) in response to receiving a signal from said grass sensor and said presence sensor (4), wherein said means for operating said lawn-mower controls operation of said motor-drive to direct said lawn-mower to said uncut region of grass and said presence sensor comprises an electronic proximity sensor that includes an oscillator comprising a metal-oxide-semiconductor (MOS) junction, wherein the oscillator provides an electric output oscillation in response to variations of an input signal.
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Abstract
Lawn-mower comprising one or more motor-driven wheels and at least one cutting device, and further comprising elements for determining a distance value of an external mass to modify the behaviour of the lawn-mower in response to the distance.
52 Citations
25 Claims
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1. Lawn-mower (1) comprising:
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a motor-drive (2), a cutting device (3), a presence sensor (4) for detecting a presence of an external mass within a predetermined distance which is greater than or equal to zero, a grass sensor for detecting regions of grass having a surface height that is indicative of an uncut region of grass that has not already been cut, and means for operating said lawn-mower (1) in response to receiving a signal from said grass sensor and said presence sensor (4), wherein said means for operating said lawn-mower controls operation of said motor-drive to direct said lawn-mower to said uncut region of grass and said presence sensor comprises an electronic proximity sensor that includes an oscillator comprising a metal-oxide-semiconductor (MOS) junction, wherein the oscillator provides an electric output oscillation in response to variations of an input signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification