A dynamometer load device applies a load to a dynamometer unit that is connected to a hub of a wheel of a motor vehicle and being movable. The dynamometer load device applies, in conjunction with steering of the motor vehicle, a load to the dynamometer unit turning along with the hub. The load is applied in a direction opposite to a turning direction of the dynamometer unit.

A pedal exercise signal detection device includes a sleeve having an outer circumference having a pressure signal connection device and a pressure detection unit mounted thereon; a first bearing disposed in the sleeve; a stator having a positioning axle having an end formed with a fastening hole; a fastener element fastening the stator and the sleeve together; a pedal having an axle hole into which the sleeve is inserted to be positioned therein and a receiving trough including a through opening corresponding to the pressure signal connection device; and a control circuit board disposed in the receiving trough and including signal reader units that extend through the through opening and corresponding to the pressure signal connection device.

Apparatus and method for monitoring operational performance of an engine, the apparatus comprising a sensor (10) for detecting torsional strain of a shaft (21) of an engine, and the apparatus further comprising a data processor arranged to process signals received from the strain sensor, and the data processor further arranged to compare one or more operational characteristics of the measured torsional strain data with idealised operational data so as to provide a measure of operational performance indicator of the engine.

A power meter for cycling is capable of measuring a positional and/or alignment change of a first measurement location on a rigid component of a human-powered vehicle relative to a second measurement location. Power output by the cyclist during cycling is then calculated based upon the measured positional and/or alignment change. The positional and/or alignment change may be measured using, e.g., a magnet/magnetic-field sensor pair or by a light source/light sensor pair.

A power measurement device, which may be mounted to an inside area of a crank arm, includes processing circuitry within a housing. The processing circuitry is coupled with strain gauges mounted on the crank arm, and produces a power value that is wireless transmitted to a separate display that may receive and display power measurements. The housing may include a mounted portion and a cantilever portion where the mounted portion houses the processing circuitry and the cantilever portion houses batteries supply energy for the processing circuitry and other features.

A dynamometer load device applies a load to a dynamometer unit that is connected to a hub of a wheel of a motor vehicle and being movable. The dynamometer load device applies, in conjunction with steering of the motor vehicle, a load to the dynamometer unit turning along with the hub. The load is applied in a direction opposite to a turning direction of the dynamometer unit.

Power measurement device for a bicycle trainer, which device is built as a unitary relocatable device comprising an acceleration or velocity sensor, a microcontroller and a memory, wherein the device is equipped with or connectable to a power source, preferably a battery, and wherein the device is equipped with a communication facility to enable the device to wirelessly or through wires communicate with an external application device.

A method of adjusting the dosing force of a door coupled to a door closer assembly having a bias element. The method includes determining the kinetic energy of the door without using the weight or other dimensions of the door. The determined kinetic energy is used to adjust the closing force of an electro-mechanical door closer that includes a spring and a motor. The door includes the use of one, some of, or all of an accelerometer, an angular position sensor, a time to close, a breaking torque, and a controller to identify values a acceleration, velocity, and/or position of the door. The identified values are provided to the controller, which is configured to calculate the kinetic energy of the door. The calculated kinetic energy is used to determine the closing velocity of the door closure to ensure proper operation of the door at the point of installation.

Systems and methods for testing the accuracy of a bicycle training apparatus that is configured to measure the power output of a cyclist riding on a bicycle. The system includes a base, a main drive shaft secured to the base, a motor secured to the base and configured to rotate the main drive shaft, torque and rotational speed sensors configured to measure the torque and rotational speed of the main drive shaft during rotation thereof. The bicycle training apparatus may be secured relative to the base and functionally coupled to the main drive shaft. The motor may then be operated to apply a power input to the bicycle training apparatus while measuring the torque and rotational speed of the main drive shaft and the power input with the bicycle training apparatus. The resulting measurements may be compared to determine the accuracy of the bicycle training apparatus.

The purpose of the present invention is to provide a control device for a dynamometer system, with which, by a simple method, an unloaded state can be reproduced highly accurately when a test piece is started. A dynamo control device 6 is provided with: an integral control input computation unit 611 for computing the integral value of axle torque deviation, and multiplying the sum thereof and a correction value by an integral gain to compute an integral control input; a correction value computation unit 612 for multiplying an inertia compensation quantity Jcmp by the dynamo rotation frequency to compute a correction value; a non-integral control input computation unit 613 for designating, as a non-integral control input, the output of a prescribed transmission function Ge0(s) having axle torque deviation as input; and a totaling unit 614 for totaling the integral control input and the non-integral control input in order to generate a torque current command signal to the dynamometer. The transmission function Ge0(s) of the non-integral control input computation unit 613 is derived by separating the integrator from a transmission function Ge(s) having an axle torque control function, in such a way as to satisfy the relational equation (Ge(s)=Ki/s+Ge0(s)).