The present disclosure provides position detector for an electric machine. The detector uses one or more proximity sensors, such as eddy current sensors, to detect features on the rotor of an electric machine. The detectable feature may be a spiral groove, which has a unique position at any given point around the circumference of the rotor. As the rotor is typically steel, the proximity sensors produce different output values depending on the degree to which they are aligned with the groove. As such, given that the groove has a unique position at any given location, the output of the proximity sensors is also unique for any given position. This enables the position of the rotor with respect to the sensors to be determined.

This disclosure relates to a torque sensing system. The torque sensing system comprises a rotatable shaft (102) having a first part and a second part, the shaft comprising a spring structure (122) between the first and second part; a first readout structure (130) connected to the first part, the first readout structure (130) comprising first position indicators, and a second readout structure (132) connected to the second part, the second readout structure (132) comprising second position indicators; a detector system for detecting the first and second position indicators and generating a first detection signal indicating respective passing times for the first position indicators and a second detection signal indicating respective passing times for the second position indicators; and a processor. The processor is configured for determining an angular position of the first readout structure (130) occurring at a particular time instance based on a detected passing time of at least one first position indicator on the first readout structure (130) and on a first relation between angular position of the first readout structure (130) and time around said particular time instance; and determining an angular position of the second readout structure (132) occurring at the particular time instance based on a detected passing time of at least one second position indicator on the second readout structure (132) and optionally based on a second relation between angular position of the second readout structure (132) and time around said particular time instance; and, determining an angle of twist at the particular time instance based on the angular position of the first readout structure (130) and the angular position of the second readout structure (132), the angle of twist being associated with a torque applied to the first and/or second part of the rotatable shaft (102).

A method for monitoring the torsion of a rotary shaft on an aircraft turbomachine based on the measurements from at least three sensors distributed along the rotary shaft to divide the shaft into at least two shaft segments, the method comprising: a step of measuring, for each sensor, a parameter dependent on the rotation of the shaft, a step of calculating, for each achievable pair of sensors, a parameter related to the torsion of the shaft, a step of comparing the different calculated parameters related to the torsion of the shaft with references, a step of detecting damage on a shaft segment at the end of the comparison step, and a step of indicating the localization of the damage on the shaft from the shaft segment for which damage has been detected.

The invention relates to a device, an arrangement and a method for characterizing the torsion, rotation, and/or positioning of a shaft by generating a periodic magnetic field of a magnetic field generator disposed between at least two magnetic field detectors by applying a periodic exciter signal. The field is modified by the shaft and induces an output signal at each of the magnetic field detectors. The difference with respect to amplitude or phase between the exciter signal and the first output signal is detected as a first measured variable and between the exciter signal and the second output signal is detected as a second measured variable. The total of and/or the difference between the first and the second measured variables is calculated, and the torsion, rotation, and/or positioning of the shaft is characterized based thereon.

A vehicle steering apparatus. The durability of a sensor rotor to heat and abrasion is improved. The flatness of the sensor rotor is prevented from being lowered during calking for coupling of the sensor rotor to a steering shaft so that steering torque of a driver can be more accurately detected. A fabrication process is simplified, and fabrication costs are reduced.

A solution for measuring torque and other parameters of a mechanical component is provided. At least two bands can be affixed to the mechanical component and at least two sensing assemblies can be operatively coupled to each band. Each sensing assembly generates signals indicative of relative movement between a respective band and the sensing assembly. A signal conditioner conditions the signals for a computing unit to determine the torque to the mechanical component. The computing unit can determine the torque from a twist of the mechanical component that can be correlated with the torque.

A method of determining a torque applied to a rotatable shaft is provided. The method includes transmitting a first electro-magnetic transmit signal towards a first mutually coupled structure mechanically coupled to the rotatable shaft, converting, by the first mutually coupled multitrack structure, the first electro-magnetic transmit signal into a first electro-magnetic receive signal; receiving the first electro-magnetic receive signal; evaluating the received first electro-magnetic receive signal; and determining the torque applied to the rotatable shaft based on the evaluated first electro-magnetic receive signal.

A resolver interface system for a motor drive system includes a phase detector configured to be operatively connected to a rotation signal output of a resolver to receive a rotation signal therefrom and generate a phase difference signal. A differentiator is operatively connected to an output of the phase detector to convert the phase difference signal of the phase detector into a pulse output configured to be read by a processing system.

Systems and methods for measuring torque on a drive train component of a rotating drive system are disclosed. In some aspects, a system includes a target assembly, a sensor assembly, and a sensor processing unit. The sensor assembly is located proximate to the target assembly, and the sensor assembly includes sensors mounted radially around the shaft and configured to detect sensor targets as the target assembly rotates with the drive train component. The sensor processing unit is configured for receiving sensor signals from the sensor assembly and outputting a torque signal based on the sensor signals. The sensor processing unit is configured for receiving target calibration data for the target assembly and sensor calibration data for the sensor assembly. The sensor processing unit is configured for verifying that the target calibration data corresponds to the target assembly and that the sensor calibration data corresponds to the sensor assembly.

A solution for measuring torque and other parameters of a mechanical component is provided. At least two bands can be affixed to the mechanical component and at least two sensing assemblies can be operatively coupled to each band. Each sensing assembly generates signals indicative of relative movement between a respective band and the sensing assembly. A signal conditioner conditions the signals for a computing unit to determine the torque to the mechanical component. The computing unit can determine the torque from a twist of the mechanical component that can be correlated with the torque.