A device with rotatable footpads for use with interactivity systems and method for same are disclosed. The apparatus may comprise two footpads, wherein the two footpads rotate independently with respect to at least one axis; a plurality of sensors that detect the rotation of each footpad; and a controller transmitting signals from the plurality of sensors representing the rotation of each footpad to a virtual reality or teleoperation system. The method for using the apparatus may comprise stabilizing footpads by a mechanical means detecting the rotation of the footpads on an at least one axis passing through the footpads via sensors of the footpads that detect rotation of the footpads; and transmitting a digital representation of the rotation of the footpads to an interactivity system.

An angular speed acquisition device acquires the angular speed about a road surface perpendicular axis of a leaning vehicle. The leaning vehicle includes a vehicle body frame capable of leaning in a vehicle left-right direction and a steering shaft which steers at least one of a front wheel unit and a rear wheel unit. An angular speed acquisition device, which is mountable on the leaning vehicle, includes a memory and a processor. The memory stores the relationship between the steering angle, which is a rotation angle about the rotational axis of the steering shaft, the vehicle speed of the leaning vehicle, and the angular speed ω about the road surface perpendicular axis.

An activity state analyzer 10 configured to analyze an activity state of a cyclist during cycling includes: a sensor unit (21 to 26, 18) configured to acquire sensor data from a plurality of types of sensors including an acceleration sensor 21 and a gyroscope sensor 22 that are attached to a lower back of the cyclist, and a CPU 11 configured to analyze an activity state of the cyclist during cycling based on a detection output from the plurality of types of sensors of the sensor unit (21 to 26, 18).

A spindle shaft device including a shaft, a first torque sensor, and a second torque sensor. The shaft extends along an axial direction and comprises a first side portion, a second side portion, and a central portion located between the first side portion and the second side portion. The central portion has a central torsional rigidity with respect to the axial direction. The first side portion has a first torsional rigidity with respect to the axial direction. The second side portion has a second torsional rigidity with respect to the axial direction. The first torsional rigidity is smaller than the central torsional rigidity. The second torsional rigidity is smaller than the central torsional rigidity. The first torque sensor is disposed on the first side portion. The second torque sensor is disposed on the second side portion.

A slope sensitive pitch adjustor for a bicycle seat includes a rotatable seat support, a gravity sensor mounted thereto, a means for rotating the rotatable seat support, and an automated controller configured to drive the rotating means in response to an acceleration signal received from the gravity sensor. The automated controller stores data representing an initial condition of a pitch angle of the rotatable seat support with respect to horizontal and executes a control algorithm to maintain the initial condition when the bicycle is ridden over changing gradients.

A slope sensitive pitch adjustor for a bicycle seat includes a rotatable seat support, a gravity sensor mounted thereto, a means for rotating the rotatable seat support, and an automated controller configured to drive the rotating means in response to an acceleration signal received from the gravity sensor. The automated controller stores data representing an initial condition of a pitch angle of the rotatable seat support with respect to horizontal and executes a control algorithm to maintain the initial condition when the bicycle is ridden over changing gradients.

Disclosed is a vehicle. The vehicle generally includes a frame to support an engine and one or more supports, such as wheels, to support the frame. The engine may include an internal combustion power plant and a fuel supply system therefore.

A device is for fixing equipment to an end of the inner surface of a tube. The device has an elongated body, a ring adapted to surround and slide along a segment of the elongated body, and at least two flaps rotatable on the ring. Each hole in the elongated body is adapted for bearing a bolt aligned with the longitude of the elongated body. The ring has at least two threaded bores designed to mate with the threads of the bolts so that the position of the ring on the elongated body is controllable by applying torque to the bolts; and the flaps are positioned homogenously around the ring. The elongated body has at least one portion adapted to guide the flaps so that the flaps radially open against the inner surface of the tube.

A device is for fixing equipment to an end of the inner surface of a tube. The device has an elongated body, a ring adapted to surround and slide along a segment of the elongated body, and at least two flaps rotatable on the ring. Each hole in the elongated body is adapted for bearing a bolt aligned with the longitude of the elongated body. The ring has at least two threaded bores designed to mate with the threads of the bolts so that the position of the ring on the elongated body is controllable by applying torque to the bolts; and the flaps are positioned homogenously around the ring. The elongated body has at least one portion adapted to guide the flaps so that the flaps radially open against the inner surface of the tube.

Rear suspension device for a bicycle with three pivots, each with an axis of rotation an axial compression shock absorber, a linkage unit, a sensor unit and a magnet. The axes of rotation are parallel to each other and the axial compression shock absorber has a first end attached to the first pivot and a second end attached to the second pivot. The linkage unit is attached to the second pivot and the third pivot and rotates about the second and third axis of rotation. The sensor unit is on a surface of the linkage unit and comprises a Hall-effect sensor located in a plane perpendicular to the third axis of rotation and located at a distance d1 from the third axis of rotation. The first magnet is: a cylindrical or cylindrical shell magnet having an axis of rotational symmetry which is perpendicular to the parallel faces thereof; or a prism-shaped magnet comprising two polygonal parallel faces and an axis of rotational symmetry which is perpendicular to said parallel faces. The direction of the magnetic moment of the first magnet is perpendicular to said axis of rotational symmetry, and the first magnet is attached to the third pivot. The third axis of rotation and the axis of rotational symmetry of said first magnet are aligned. A distance d2 between said sensor unit and said magnet, and d1 is between 0.1 mm and 50 mm and d2 is between 0.01 mm and 50 mm.