The present invention discloses a pair of intelligent roller skating shoes; each comprising a shoe body, a wheel carrier, and an intelligent module, wherein the wheel carrier comprises a connecting frame connected to the shoe body and wheels arranged on the connecting frame, one wheel is provided with a magnet, the intelligent module comprises a circuit board and a terminal device connected by wireless signal transmission, the circuit board comprises a power unit as well as a magnetic sensor and a wireless transmission unit connected to the power unit by circuits, the magnet can respond to the magnetic sensor. The roller skating data obtained by sensing is transmitted to the terminal device by the wireless transmission unit, so that the activity data of the roller skating shoes can be detected to visually learn the exercise situation and also increase the roller skating fun.

Sports equipment comprising a ski (1) and a lift group (G); the ski (1) comprises a longitudinal axis (Z), a tip (11), a tail (12), two lateral edges (13) and a bridge-like structure (15), arranged between the tail (12) and the tip (11), above the ski (1); the bridge-like structure (15) comprises a hooking surface (15a) for bindings (AT) of a user's boot and defining, on a lower side, a duct (16); said lift group (G) comprising an engine unit (M) comprising a motor (2) and a drum (4) moved by the motor (2), a management and control unit (U) connected to the motor (2), a first roller (51) arranged on the tip (11) of the ski (1), a second roller (52) arranged on the tail (12) of the ski (1) and a belt (6) closed on itself and wound longitudinally around the ski under a condition for which it slides around the two rollers (51, 52), being dragged in rotation by the above-mentioned drum (4) and being slidingly inserted on the duct (16); the belt (6) is equipped with a rib sliding in a groove of the ski (1).

An electric weight sensing skateboard using one or more strain gauge systems to detect rider-induced strain on one or both trucks, an inertial sensor to detect accelerations and balance position, and wheel speed sensors. Throttle is controlled by rider position, for example, lean forward to increase speed, lean back to slow down. Several drive methods include a driver position detection velocity setpoint control, torque setpoint control, and direct velocity/torque control. A throttle remote is note required. Rider weight activates the motors.

A self-balancing board is provided, comprising a primary wheel assembly, a platform, at least one sensor, a controller, a first auxiliary wheel assembly, and a first brake element. The primary wheel assembly comprises a primary wheel and a motor driving the primary wheel. The platform is secured to the primary wheel assembly and has a foot deck. The at least one sensor senses the orientation of the platform. The controller receives data from the at least one sensor and controls the motor in response to the received data. The first auxiliary wheel assembly is secured to the platform distal the primary wheel assembly, and is elevated from contacting a flat surface upon which the primary wheel rests when the foot deck is parallel to the flat surface. The first brake element is manually movable relative to the first auxiliary wheel assembly to engage the first auxiliary wheel assembly to provide resistance to rotation of the first auxiliary wheel assembly.

A system for providing player training including a grid of individually powered, processor controlled and communicable lighting elements and sensors which are embedded within a playing surface associated with the event, the lighting elements interfacing with at least one of a player worn sensor and/or a remote processor device for providing a visual illustration of any number of parameters associated with an actual player performance, including real time motion progressions of the player which are represented on the field surface and/or recreated on a processor driven screen which films or otherwise tracks the event. The simulated progressions can further replicate the desired motions of the positional player's intended motions or those of an opposing positional player and in lieu of the actual player being on the playing surface.

An apparatus and method for reducing the incidence of sudden stoppage while riding a self balancing skateboard. Wheels are mounted with the front of the bumper, or integrated within a special replacement bumper, of the skateboard to provide a low-friction rollout instead of an instant stop, allowing the rider to maintain control in the event that the front of the board contacts the ground. The wheels protrude from a lower surface of the bumper to limit contact of the bumper with the ground.

A sport-boot pressure monitoring system and method of use. The system includes a left boot sensor having a left flexible fluid-containing bladder shaped to fit between a user's left leg and an interior surface of a left boot worn by the user and a left pressure sense element in pressure-sensing communication with the left flexible fluid-containing bladder, a right boot sensor that is similar to the left one, and a controller to provide a pressure alert if pressure between one of the user's legs and the interior surface of the boot worn on that leg violates a predetermined pressure threshold and to provide a proximity alert if a distance between the left and right boots violates a predetermined proximity threshold.

The novel system of the present invention includes a plurality of moveable markers, such as cones, having two visually contrasting indicators useful for physically and visually demarcating activity zones. The markers can be dispersed spatially, such as being placed on the ground or on posts, to demarcate areas, zones, regions or boundaries, for conducting an activity, such as soccer practice. The system is useful to guide, instruct, monitor or constrain the activity of an individual, or object. Alignment of the markers can visually separate one zone from another zone so as to indicate different activities for each zone.

When an electric vehicle is traveling downhill, experiencing regenerative braking, or otherwise forcing the vehicle motor to turn faster than the commanded motor torque, the vehicle motor produces electrical energy that can be used to recharge a vehicle battery. However, if the vehicle battery is already nearly or fully charged, the excess electrical energy produced may damage the battery. Control systems described herein may reduce and/or dispose of the excess energy by manipulating the motor flux (i.e., direct) current and quadrature current independently.

A system for measuring power generated by a skier is disclosed. The power generated by the skier may be calculated based upon each complete revolution of a ski pole or ski movement. To do so, the system may include various sensors that measure a force exerted on a ski pole or ski, the angle of the ski pole or ski, and the velocity of the skier at various time instants within each ski pole or ski revolution. A processing unit may calculate power generated by the skier in the skier's direction of travel using the force exerted in the skier's direction of travel during a complete revolution of ski pole (or ski) movement and the velocity of the skier.