An electric vehicle includes a carrier, a free-wheel unit, a foot-wheel unit, a driving unit, a first angle-detecting unit and a micro processing unit. The carrier is for supporting a user. The free-wheel unit is disposed at one end of the carrier. The foot-wheel unit is disposed at the other end of the carrier. The driving unit is disposed at the free-wheel unit or the foot-wheel unit, and is for providing a power to the electric vehicle. The first angle-detecting unit is disposed at the free-wheel unit or the carrier, and is for detecting a swinging status between the free-wheel unit and the carrier so as to provide a swinging signal. The micro processing unit is signally connected to the driving unit and the first angle-detecting unit. When the swinging signal achieves a predetermined condition determined by the micro processing unit, the driving unit is turned on.

A ski may define a body that defines a tip, a tail opposite the tip, a top sheet, a base extending from the tip to the tail and opposite the top sheet, a core layer positioned between the base and the top sheet, and a reinforcement layer positioned between the top sheet and the base. The reinforcement layer defines an aperture extending through the reinforcement layer and positioned within a first third of a length of the ski, the length defined from the tip to the tail.

A self-stabilizing, one-wheeled electric skateboard may include improved features. In some examples, the vehicle includes a status indicator viewable through a slot formed in an upper surface of the board. In some examples, the vehicle includes a convertible carrying handle transitionable between stowed and deployed positions. In some examples, the vehicle includes an interchangeable fender and fender substitute that may be removably coupled to an upper surface of the board. In some examples, a motor controller of the vehicle may operate a field-oriented control (FOC) scheme configured to control the electric motor by manipulating a direct current aligned with a rotating rotor flux angle and a quadrature current defined at ninety degrees from the rotating rotor flux angle. In some examples, the motor controller may be configured to permit intuitive dismounting of the vehicle by tilting and/or moving the vehicle backward.

The illuminants arrangement includes a plurality of LED-based light sources that are encased in a water-tight manner by way of one or more encasings, wherein the light sources are, at least in a group-wise manner, operationally interconnected by way of electrical connection leads. The connection leads include voltage supply leads. The illuminants arrangement as a protection of the one or more encasings and the light sources from mechanical damage includes at least one protective overlay for being placed onto the one or more encasings, so that light emitted by the light sources can be emitted through the at least one protective overlay. The illuminants arrangement can include a heating device. Each of the light sources can be suitable for emitting light of a variable color, wherein the color of each of the light sources can be individually selected by way of a control unit.

According to some implementations an ice rink is provided that includes a plurality of coolant tubes that are configured to transport a coolant to cool ice located above the coolant tubes. The ice has a top surface on which ice skating or other activities may occur. An elongate light-diffusing optical fiber is positioned below the top surface of the ice and is configured to transmit light to the top surface of the ice.

A motorized vehicle assembly includes an axle comprising a channel extending along a central axis of the axle, a socket positioned within the channel of the axle, and a motorized wheel configured to be mounted on an end the axle. The motorized wheel includes a boss configured to engage the end of the axle when the motorized wheel is mounted on the axle, an electric motor, a tire mounted on the rotor, and a plug positioned within the boss, the plug configured to engage with the socket when the motorized wheel is mounted on the axle. The electric motor includes a stator fixed to the boss and a rotor surrounding the stator, the rotor configured to rotate relative to the stator. The electric motor is configured to cause the rotor to rotate relative to the stator to cause the tire to rotate.

According to some implementations an ice rink is provided that includes a plurality of coolant tubes that are configured to transport a coolant to cool ice located above the coolant tubes. The ice has a top surface on which ice skating or other activities may occur. An elongate light-diffusing optical fiber is positioned below the top surface of the ice and is configured to transmit light to the top surface of the ice.

The present invention relates to a sport stick that measures the driving force generated by the upper body, which is applied to the ground through poles during the natural performance of nordic walking or any other sport, where poles are used to drive/propel the body forward. An inclination sensor along with a pole length sensor (pole length constant in a fixed length pole) has been placed into the pole for the achievement of the most suitable biomechanical performance, i.e. proper technique. The sport pole uses the Global Positioning System along with a topographical map to ensure that the slope of terrain does not affect the inclination sensor measurements. All collected data is analyzed by a control center, wherein correct usage models have been saved along with a collection of the user's anthropometric and fitness levels.

According to some implementations a floor is provided that comprises a substrate having a top surface and a groove formed therein. The groove has an open end located at the top surface of the substrate. The groove further includes a bottom wall and side walls with the bottom wall located a first distance below the top surface of the substrate. The groove extends along a length of the substrate. A light diffusing optical fiber or other lighting means is supported inside the groove by a transparent or translucent fiber support that spaces the light diffusing optical fiber or other lighting means a distance away from the bottom wall, side walls and open end of the groove. According to some implementations the walls of the groove or the outer surfaces of the fiber support are provided with light reflectors to enhance the propagation of light toward the open end of the groove.

A play device for a rebound sport with a play area is provided, on which a ball can be played by a player to rebound from an impact position in accordance with a predetermined set of rules of the rebound sport, which includes a sensor system configured to detect two-dimensional first coordinates of the impact position and to transfer the two-dimensional first coordinates to a computing unit configured to determine two-dimensional second coordinates, a size and/or a shape of a target field depending on the first coordinates in accordance with a predetermined specification and to control a projector to project the target field to be optically perceptible by the player on a projection area, wherein the ball can be played by the player on the target field to rebound from the target field in accordance with the set of rules of the rebound sport.