Robotic lawn mower with boundary stands
First Claim
1. A mowing system for mowing a lawn, comprising:
- a robotic lawn mower and a plurality of boundary stands, wherein said boundary stands are placed near a boundary of the lawn, wherein each boundary stand of said boundary stands does not store location coordinates of the boundary stand;
an ultrasonic transmitter is placed on said robotic lawn mower to broadcast ultrasonic waves toward said boundary stands, an ultrasonic receiver is placed on each boundary stand to receive ultrasonic waves from said robotic lawn mower, the time-of-flights of ultrasonic waves are measured to obtain the distances in between said robotic lawn mower and said boundary stands, an RF transceiver is placed on said robotic lawn mower and on each boundary stand to transmit and receive RF signals,said RF transceiver placed on said robotic lawn mower transmits RF signal toward said boundary stands to synchronize and calibrate the time clocks of said boundary stands, and to receive distance data from said boundary stands,said RF transceiver placed on each boundary stand receives RF signal from said robotic lawn mower to synchronize and calibrate the time clock of each boundary stand, and to transmit distance data to said robotic lawn mower,wherein said robotic lawn mower moves first predetermined length in first predetermined direction to first position to broadcast first ultrasonic wave to collect first set of relative distances in between said robotic lawn mower and boundary stands, and said robotic lawn mower moves second predetermined length in second predetermined direction to second position to broadcast second ultrasonic wave to collect second set of relative distances in between said robotic lawn mower and boundary stands, such that said robotic lawn mower, with the continuous moving and the collection of said relative distances, determines its relative position with respect to said boundary stands, thereby, said robotic lawn mower defines a route to mow the lawn.
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Accused Products
Abstract
At least some embodiments of the present invention disclose a robotic lawn mowing system coupled with boundary stands to control and to monitor the moving of the robotic lawn mower. The robotic lawn mower uses boundary stands to identify the lawn boundary, to determine the position of the robotic lawn mower in a lawn, and to define the mowing routes. The ultrasonic and RF devices are placed on the robotic lawn mower and on the boundary stands. Based on the disclosed technology, users can define and design the mowing routes to mow the lawn according to their preferences. The control of the robotic lawn mower may be wireless, and users may monitor and control the robotic lawn mower with a computer, a cell phone, or a tablet through a wireless network.
10 Citations
4 Claims
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1. A mowing system for mowing a lawn, comprising:
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a robotic lawn mower and a plurality of boundary stands, wherein said boundary stands are placed near a boundary of the lawn, wherein each boundary stand of said boundary stands does not store location coordinates of the boundary stand; an ultrasonic transmitter is placed on said robotic lawn mower to broadcast ultrasonic waves toward said boundary stands, an ultrasonic receiver is placed on each boundary stand to receive ultrasonic waves from said robotic lawn mower, the time-of-flights of ultrasonic waves are measured to obtain the distances in between said robotic lawn mower and said boundary stands, an RF transceiver is placed on said robotic lawn mower and on each boundary stand to transmit and receive RF signals, said RF transceiver placed on said robotic lawn mower transmits RF signal toward said boundary stands to synchronize and calibrate the time clocks of said boundary stands, and to receive distance data from said boundary stands, said RF transceiver placed on each boundary stand receives RF signal from said robotic lawn mower to synchronize and calibrate the time clock of each boundary stand, and to transmit distance data to said robotic lawn mower, wherein said robotic lawn mower moves first predetermined length in first predetermined direction to first position to broadcast first ultrasonic wave to collect first set of relative distances in between said robotic lawn mower and boundary stands, and said robotic lawn mower moves second predetermined length in second predetermined direction to second position to broadcast second ultrasonic wave to collect second set of relative distances in between said robotic lawn mower and boundary stands, such that said robotic lawn mower, with the continuous moving and the collection of said relative distances, determines its relative position with respect to said boundary stands, thereby, said robotic lawn mower defines a route to mow the lawn. - View Dependent Claims (2, 3, 4)
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Specification