Rider detection system
DCFirst Claim
1. An electric vehicle, comprising:
- a board including first and second deck portions each configured to receive a left or right foot of a rider oriented generally perpendicular to a longitudinal axis of the board;
a wheel assembly including a ground-contacting element disposed between and extending above the first and second deck portions;
a motor assembly mounted to the board and configured to rotate the ground-contacting element around an axle to propel the electric vehicle;
at least one orientation sensor configured to measure orientation information of the board;
a first sensing region disposed in the first deck portion, the first sensing region including two pressure-sensing transducers laterally spaced from each other, such that a first of the two pressure-sensing transducers registers with a first portion of the foot of the rider and a second of the two pressure-sensing transducers registers with a second portion of the same foot of the rider; and
a motor controller configured to receive board orientation information measured by the orientation sensor and rider presence information based on outputs of the two pressure-sensing transducers, and to cause the motor assembly to propel the electric vehicle based on the board orientation information and the rider presence information;
wherein the motor controller is further configured to halt the motor assembly in response to activation of exactly zero or exactly one of the two pressure-sensing transducers when a speed of the electric vehicle is below a threshold value.
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Abstract
An electric vehicle may comprise a board including deck portions each configured to receive a foot of a rider, and a wheel assembly disposed between the deck portions. A motor assembly may be mounted to the board and configured to propel the electric vehicle using the wheel assembly. At least one orientation sensor may be configured to measure orientation information of the board, and at least one pressure-sensing transducer may be configured to determine rider presence information. A motor controller may be configured to receive the orientation information and the rider presence information, and to cause the motor assembly to propel the electric vehicle based on the orientation and presence information.
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Citations
19 Claims
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1. An electric vehicle, comprising:
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a board including first and second deck portions each configured to receive a left or right foot of a rider oriented generally perpendicular to a longitudinal axis of the board; a wheel assembly including a ground-contacting element disposed between and extending above the first and second deck portions; a motor assembly mounted to the board and configured to rotate the ground-contacting element around an axle to propel the electric vehicle; at least one orientation sensor configured to measure orientation information of the board; a first sensing region disposed in the first deck portion, the first sensing region including two pressure-sensing transducers laterally spaced from each other, such that a first of the two pressure-sensing transducers registers with a first portion of the foot of the rider and a second of the two pressure-sensing transducers registers with a second portion of the same foot of the rider; and a motor controller configured to receive board orientation information measured by the orientation sensor and rider presence information based on outputs of the two pressure-sensing transducers, and to cause the motor assembly to propel the electric vehicle based on the board orientation information and the rider presence information; wherein the motor controller is further configured to halt the motor assembly in response to activation of exactly zero or exactly one of the two pressure-sensing transducers when a speed of the electric vehicle is below a threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An electric skateboard, comprising:
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a foot deck having first and second deck portions each configured to support a rider'"'"'s foot oriented generally perpendicular to a longitudinal axis of the foot deck; exactly one ground-contacting wheel disposed between and extending above the first and second deck portions and configured to rotate about an axle to propel the electric skateboard; at least one orientation sensor configured to measure an orientation of the foot deck; a sensing region disposed in the first deck portion, the sensing region including two pressure-sensing transducers laterally spaced from each other, such that a first of the two pressure-sensing transducers registers with a first portion of one foot of the rider and a second of the two pressure-sensing transducers registers with a second portion of the one foot of the rider; and an electric motor configured to cause rotation of the ground-contacting wheel based on the orientation of the foot deck and an output of the sensing region; wherein the electric motor is configured to halt in response to activation of exactly zero or exactly one of the two pressure-sensing transducers when a speed of the electric skateboard is below a threshold value. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A self-balancing electric vehicle, comprising:
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a frame defining a plane and having a longitudinal axis; a first deck portion mounted to the frame and configured to support a first foot of a rider oriented generally perpendicular to the longitudinal axis of the frame; a second deck portion mounted to the frame and configured to support a second foot of a rider oriented generally perpendicular to the longitudinal axis of the frame; a wheel mounted to the frame between the deck portions, extending above and below the plane and configured to rotate about an axis lying in the plane, the wheel extending laterally across at least a majority of a width of the first deck portion; at least one orientation sensor mounted to the frame and configured to sense orientation information of the frame; a pair of pressure-sensing transducers disposed on the first deck portion and covered by a solid upper layer that directly abuts the pair of pressure-sensing transducers, the pair of pressure-sensing transducers arranged such that a first of the pressure-sensing transducers registers with a first portion of the first foot of the rider and a second of the pressure-sensing transducers registers with a second portion of the first foot of the rider, the first and second pressure-sensing transducers configured to sense rider presence information based on one or more forces applied to the first deck portion through the solid upper layer; a motor controller configured to receive the orientation information and the rider presence information and to generate a motor control signal in response; and a motor configured to receive the motor control signal from the motor controller and to rotate the wheel in response, thereby propelling the electric vehicle; wherein the motor controller is further configured to halt the motor assembly in response to activation of exactly zero or exactly one of the pressure-sensing transducers when a speed of the electric vehicle is below a threshold value. - View Dependent Claims (17, 18, 19)
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Specification