Aspects of the subject technology relate to communication device used as a power meter. The communication device includes circuitry to determine values of several forces and a processor. The processor determines a combined force by combining the determined values of the forces. The processor further determines a value of a power based on the s combined force, a speed and a loss factor. The communication device is used by a user to measure the power. The power is generated by the user when engaged in an activity, and the forces affect a movement of the user.

A method for ascertaining movement variables of a two-wheeled vehicle. The two-wheeled vehicle includes a sensor system including rotational rate, acceleration, and wheel rotational speed sensors. The wheel rotational speed sensor detects at least one measurement pulse per rotation of a wheel of the two-wheeled vehicle. The method includes: acquisition of three-dimensional rotational rates of the two-wheeled vehicle by the rotational rate sensor, acquisition of acceleration values by the acceleration sensor, estimation of a state of movement of the two-wheeled vehicle based on the acquired rotational rates, the state of movement including estimated values for estimated acceleration values and for an estimated speed and for an estimated distance traveled, first correction of the estimated state of movement based on the acquired acceleration values, and ascertaining of an instantaneous speed of the two-wheeled vehicle and/or of a distance traveled by the two-wheeled vehicle, based on the corrected estimated state of movement.

A method for operating a two-wheeler. The two-wheeler includes a drive unit and a sensor system, the sensor system including a rotation rate sensor, an acceleration sensor, and a wheel speed sensor. The wheel speed sensor detects at least one measuring pulse per revolution of a wheel of the two-wheeler. The method includes: detecting three-dimensional rotation rates of the two-wheeler, detecting acceleration values of the two-wheeler, and estimating a motion state of the two-wheeler based on the detected rotation rates, the motion state including estimated values for estimated acceleration values and an estimated speed and an estimated distance covered, first correction of the estimated motion state based on the detected acceleration values, ascertaining an instantaneous steering angle of the two-wheeler based on the corrected estimated motion state, and actuating the drive unit and/or an antilocking system of the two-wheeler as a function of the ascertained instantaneous steering angle.

The present disclosure provides a sensor system for measuring a parameter of a body. The sensor system includes a housing mountable to a rotating part of the body. The housing includes a first dual-axis accelerometer having a first measurement axis and a second measurement axis, the first dual-axis accelerometer arranged to measure a first acceleration along the first measurement axis and a second acceleration along the second measurement axis and a second dual-axis accelerometer having a third measurement axis and a fourth measurement axis, the second dual-axis accelerometer arranged to measure a third acceleration along the third measurement axis and a fourth acceleration along the fourth measurement axis. The sensor system also includes a processor configured to receive the first, second, third and fourth measured accelerations and determine from the first, second, third and fourth measured accelerations the parameter.

The invention relates to a sensor device with a beaker-like sensor housing and a wired sensor, wherein the beaker-like sensor housing has an introduction region for insertion of the wired sensor, an orientation region for orientating the wired sensor, and a placement region for final placement and securing of the wired sensor close to an end face of the sensor. The orientation region has an internal cross-sectional contour which is adapted to the cross-sectional contour of the sensor, and the sensor is introduced into a curable material in its placement region in the sensor housing to fixedly secure the sensor in the placement region against movement.

A lap counting method and device is provided. The lap counting method and device is applied to a non-motorized vehicle, and the non-motorized vehicle is provided with a torque sensor. The lap counting method includes: S110, obtaining data of the torque sensor in real time; S120, obtaining real-time torque data according to the data of the torque sensor; S130, obtaining a change period of the real-time torque data according to the real-time torque data; and S140, determining lap counting data according to the change period, wherein the lap counting marking point is a peak value of the change period. Since the lap counting is performed by means of a periodic change of the torque acting on a crank of a bicycle, data is stable and free from interference caused by external factors, and the lap counting is stable and reliable.

A method and system for measuring a physical parameter, such as speed and/or distance travelled by a bicycle, includes a permanent magnet disposed on a front fork and a measuring circuit with a magnetic sensor disposed on a rim of the wheel at the same distance from the axis of rotation of the wheel as the magnet. The sensor passes in front of the magnet, in order to generate an induced voltage pulse at each passage. The induced voltage is rectified and stored on a capacitor to power the measuring circuit. A calculation of the parameter is performed in the calculation unit clocked by an oscillator based on the received induced voltage pulses received by knowing the value of the diameter of the bicycle wheel. Measurements performed from the measuring circuit are transmitted to a portable device carried by the user or mounted on the bicycle to be displayed.

A human-powered vehicle control device includes an electronic controller that controls a motor. The motor assists in propulsion of a human-powered vehicle including a transmission configured to change, in steps, a first ratio of a rotational speed of a drive wheel to a rotational speed of a rotary body to which human drive force is input. The controller changes a motor control state from a third control state to a fourth control state when the first ratio is changed by the transmission or a signal is received for changing the first ratio. The controller changes the motor control state from the fourth control state to a fifth control state in accordance with a value related to at least one of a speed of the human-powered vehicle, the human drive force, an inclination angle of the human-powered vehicle, and a state of a rider of the human-powered vehicle.

A human-powered vehicle control device includes an electronic controller that controls a motor. The motor assists in propulsion of a human-powered vehicle including a transmission configured to change, in steps, a first ratio of a rotational speed of a drive wheel to a rotational speed of a rotary body to which human drive force is input. The controller changes a motor control state from a third control state to a fourth control state when the first ratio is changed by the transmission or a signal is received for changing the first ratio. The controller changes the motor control state from the fourth control state to a fifth control state in accordance with a value related to at least one of a speed of the human-powered vehicle, the human drive force, an inclination angle of the human-powered vehicle, and a state of a rider of the human-powered vehicle.

A lap counting method and device is provided. The lap counting method and device is applied to a non-motorized vehicle, and the non-motorized vehicle is provided with a torque sensor. The lap counting method includes: S110, obtaining data of the torque sensor in real time; S120, obtaining real-time torque data according to the data of the torque sensor; S130, obtaining a change period of the real-time torque data according to the real-time torque data; and S140, determining lap counting data according to the change period, wherein the lap counting marking point is a peak value of the change period. Since the lap counting is performed by means of a periodic change of the torque acting on a crank of a bicycle, data is stable and free from interference caused by external factors, and the lap counting is stable and reliable.