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 or
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.
대표청구항▼
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 a
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 sensing region disposed within one of the deck portions and 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; anda 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 of the two pressure-sensing transducers. 2. The vehicle of claim 1, wherein the two pressure-sensing transducers are configured to be disposed beneath a front portion and a rear portion, respectively, of the same foot of the rider. 3. The vehicle of claim 1, wherein the transducers are embedded in an upper surface of the first deck portion. 4. The vehicle of claim 3, wherein the transducers are sandwiched between a slip-resistant layer and a rigid layer of the first deck portion. 5. The vehicle of claim 1, wherein the transducers are encased in a waterproof enclosure. 6. The vehicle of claim 5, wherein the waterproof enclosure includes an air-permeable, water-resistant vent. 7. An electric skateboard, comprising: 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; andan 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 of the two pressure-sensing transducers. 8. The electric skateboard of claim 7, wherein each of the two pressure-sensing transducers comprises a spacer layer disposed between a first electrically conductive layer and a second electrically conductive layer. 9. The electric skateboard of claim 8, wherein the first conductive layer is displaceable to electrically contact the second conductive layer. 10. The electric skateboard of claim 7, wherein the sensing region is in communication with a motor controller configured to control the electric motor. 11. The electric skateboard of claim 10, further comprising a speed sensor configured to provide wheel speed information to the motor controller, wherein the motor controller is configured to control the motor based on the output of the sensing region and the wheel speed information. 12. A self-balancing electric vehicle, comprising: 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 parallel to 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 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;a motor controller configured to receive the orientation information and the rider presence information and to generate a motor control signal in response; anda 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 of the pressure-sensing transducers. 13. The self-balancing electric vehicle of claim 12, wherein each pressure sensing transducer responds to rider absence by generating no electrical signal. 14. The self-balancing electric vehicle of claim 12, wherein each pressure sensing transducer responds to rider presence by generating a predetermined electrical signal. 15. The self-balancing electric vehicle of claim 12, wherein each transducer is embedded in an upper surface of the first deck portion. 16. The self-balancing electric vehicle of claim 15, wherein each transducer is sandwiched between a slip-resistant layer and a rigid layer of the first deck portion. 17. The self-balancing electric vehicle of claim 12, wherein each transducer is encased in a waterproof enclosure. 18. The self-balancing electric vehicle of claim 17, wherein the waterproof enclosure includes an air-permeable, water-resistant vent. 19. The self-balancing electric vehicle of claim 12, further comprising a speed sensor configured to provide wheel speed information to the motor controller, wherein the motor controller is configured to control the motor based on the output of the pressure sensing transducers and the wheel speed information. 20. The self-balancing electric vehicle of claim 19, wherein the motor controller is configured to halt the motor assembly in response to activation of exactly zero of the two pressure-sensing transducers only when a speed of the electric vehicle is below a threshold value.
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