A torque measurement system includes an outer rotational shaft and an inner rotational shaft both configured to rotate about a rotational axis. A rotation of the inner rotational shaft causes a rotation of the outer rotational shaft via a coupling structure. At least one torque applied to the inner rotational shaft is translated into a first torque-dependent angular shift between the shafts. A first metamaterial track is coupled to the outer rotational shaft and configured to co-rotate with the outer rotational shaft. A second metamaterial track is coupled to the inner rotational shaft and configured to co-rotate with the inner rotational shaft. The tracks are configured to convert an electro-magnetic transmit signal into a first electro-magnetic receive signal based on the first torque-dependent angular shift and a receiver is configured to receive the electro-magnetic receive signal and measure the at least one torque based on the electro-magnetic receive signal.

A device for measuring mechanical changes includes at least one first resistor which is designed to convert a mechanical change into a change of its resistance value and at least one operational amplifier, wherein the at least first resistor and the operational amplifier are connected such that the at least first resistor serves as input resistance for the operational amplifier and the operational amplifier provides or can provide a measurement result at an output. The first resistor is for example a strain gauge that can be secured to a component.

The subject of the invention is a method and a device for determination of a torsional deflection of a rotation shaft in the electromechanical drivetrain. The method uses a current and a voltage signals measurement of the driving electrical machine and an angular speed measurement of the shaft of the drivetrain and includes the step of measuring of a voltage U.sub.DC of the DC link unit of a converter; the step of calculating a value of a load torque T.sub.load of the driving electrical machine; the step of detecting of an oscillation O.sub.SC(T.sub.load) in the load torque T.sub.load and calculation magnitudes of characteristic frequencies of Fast Fourier Transform FFT(U.sub.DC) of the voltage U.sub.DC of DC link unit; the step of determining of a timestamp indicators t.sub.Tload for oscillations O.sub.SC(T.sub.load) and t.sub.FFT of U.sub.DC for magnitudes of characteristic frequencies of FFT(U.sub.DC) of the voltage U.sub.DC of DC link unit; the step of comparing the value of the timestamp indicators t.sub.Tload and t.sub.FFT and determining a torsional deflection of the rotation shaft if t.sub.Tload<t.sub.FFT; the step of presenting the result of the comparison to the user in a diagnostic unit.

The subject of the invention is a method and a device for determination of a torsional deflection of a rotation shaft in the electromechanical drivetrain. The method uses a current and a voltage signals measurement of the driving electrical machine and an angular speed measurement of the shaft of the drivetrain and includes the step of measuring of a voltage U.sub.DC of the DC link unit of a converter; the step of calculating a value of a load torque T.sub.load of the driving electrical machine; the step of detecting of an oscillation O.sub.SC(T.sub.load) in the load torque T.sub.load and calculation magnitudes of characteristic frequencies of Fast Fourier Transform FFT(U.sub.DC) of the voltage U.sub.DC of DC link unit; the step of determining of a timestamp indicators t.sub.Tload for oscillations O.sub.SC(T.sub.load) and t.sub.FFT of U.sub.DC for magnitudes of characteristic frequencies of FFT(U.sub.DC) of the voltage U.sub.DC of DC link unit; the step of comparing the value of the timestamp indicators t.sub.Tload and t.sub.FFT and determining a torsional deflection of the rotation shaft if t.sub.Tload<t.sub.FFT; the step of presenting the result of the comparison to the user in a diagnostic unit.

A dynamometer test unit configured for use in a vehicle dynamometer system for dynamometer testing of a vehicle, the dynamometer test unit being configured to be connected to a wheel shaft of a vehicle, the dynamometer test unit comprising a power source having a stator and a rotor and being configured to, during testing, apply torque to a wheel shaft of the vehicle being tested, the power source being carried by a stator support, the stator being journaled in relation to the stator support, the dynamometer test unit further comprising means for measuring torque comprising an elastic strip, wherein the elastic strip connects the stator to the stator support, thereby restraining relative rotational movement between stator and stator support, and configured to transfer force between the stator and stator support, the elastic strip being firmly secured in a manner such that it is subjected to homogenous tensile prestress in a longitudinal direction of the elastic strip.

A dynamometer test unit configured for use in a vehicle dynamometer system for dynamometer testing of a vehicle, the dynamometer test unit being configured to be connected to a wheel shaft of a vehicle, the dynamometer test unit comprising a power source having a stator and a rotor and being configured to, during testing, apply torque to a wheel shaft of the vehicle being tested, the power source being carried by a stator support, the stator being journaled in relation to the stator support, the dynamometer test unit further comprising means for measuring torque comprising an elastic strip, wherein the elastic strip connects the stator to the stator support, thereby restraining relative rotational movement between stator and stator support, and configured to transfer force between the stator and stator support, the elastic strip being firmly secured in a manner such that it is subjected to homogenous tensile prestress in a longitudinal direction of the elastic strip.

A method and system for engine monitoring comprises a monitoring device and a remote device that are in communication. The monitoring device is incorporated in or directly attached to the internal combustion engine and functions to sense a characteristic of the internal combustion engine. The monitoring device is configured to transmit data representative of the sensed characteristic to a remote application running on a remote device. The remote device is configure to produce engine monitoring data from the transmitted data using engine characterising data stored on the remote device.

A method and system for engine monitoring comprises a monitoring device and a remote device that are in communication. The monitoring device is incorporated in or directly attached to the internal combustion engine and functions to sense a characteristic of the internal combustion engine. The monitoring device is configured to transmit data representative of the sensed characteristic to a remote application running on a remote device. The remote device is configure to produce engine monitoring data from the transmitted data using engine characterising data stored on the remote device.

A system for torque measurement is generally provided. The system includes a sensor disposed between an outer bearing race and a static structure of a bearing assembly. The sensor is disposed adjacent along a thrust load direction to the outer bearing race. The system further includes a rotor assembly rotatably coupled to the bearing assembly, and a controller communicatively coupled to the sensor. The controller is configured to store and execute operations. The operations include determining a torque measurement from the rotor assembly based at least on an axial thrust load from the rotor assembly.

A system for torque measurement is generally provided. The system includes a sensor disposed between an outer bearing race and a static structure of a bearing assembly. The sensor is disposed adjacent along a thrust load direction to the outer bearing race. The system further includes a rotor assembly rotatably coupled to the bearing assembly, and a controller communicatively coupled to the sensor. The controller is configured to store and execute operations. The operations include determining a torque measurement from the rotor assembly based at least on an axial thrust load from the rotor assembly.