Abstract In this paper, through the FPGA technology and torque measurement system design method for analysis research, use of photoelectric coding circurling function difference between multi-channel code disk measurement. characteristics state output signal tray are classified, principle is analyzed studied. logic control, data statistics, latch other contents involved in hardware studied, so ...

In recent years there has been an explosive development of interest in the measurement of forces at the microscopic level, such as within living cells [1, 2, 3], as well as the properties of fluids and suspensions on this scale [4], using optically trapped particles as probes. The next step would be to measure torques and associated rotational motion [5]. This would allow measurement on very sm...

This paper identifies a new, potentially low cost, non-contact, frequency domain strain torque sensor utilising SAW (Surface Acoustic Wave) Technology for surface strain measurement. The sensor has a short axial length making it flexible in terms of integration into a variety of applications, encompassing both static and dynamic measurement. The paper presents a technical description of the res...

Wide-bandwidth measurements are necessary when testing electronically switched drfves. 7 b o dfficult pmblems are addressed the measurement of motor phase input power at low speed. with a high PWM modulation frequency and the measurement of small torque ripple (superlmposed on a large mean toque). In an electrlcdlY noisy envlronment. Extensive use Is made of dlgilal signal processing techniques...

Current induced domain wall (DW) depinning of a narrow DW in out-of-plane magnetized (Pt/Co)_{3}/Pt multilayer elements is studied by magnetotransport. We find that for conventional measurements Joule heating effects conceal the real spin torque efficiency and so we use a measurement scheme at a constant sample temperature to unambiguously extract the spin torque contribution. From the variatio...

The aim of our study was to compare crank torque profile and perceived exertion between the Monark ergometer (818 E) and two outdoor cycling conditions: level ground and uphill road cycling. Seven male cyclists performed seven tests in seated position at different pedaling cadences: (a) in the laboratory at 60, 80, and 100 rpm; (b) on level terrain at 80 and 100 rpm; and (c) on uphill terrain (...

This paper presents the synthesis and practical implementation of a robust digital differentiator that provides the first and second derivative of a sampled smooth signal. The robustness of the proposed digital device, based on second-order slidingmodes (2-SMs), is analyzed with respect to measurement errors. Experimental results on an induction motor (IM) drive show that fast and accurate esti...

We study sphere rotation against viscous torque confined in a small space. Our new invention, the electromagnetically spinning sphere (EMS) viscometer measures liquid viscosity through the observation of sphere rotation driven by electromagnetic interaction in a noncontact manner. The lower limit of the measurable viscosity is determined from the ratio between the viscous torque and the mechani...

A recently developed kinematic calibration technique for 6 degree-of-freedom (DOF) arms, the Jacobian measurement method, is generalized to include underconstrained and overconstrained arms. Using joint torque sensing and a wrist 6-axis force/torque sensor to measure the Jacobian, experimental results are presented for the rst 5 DOFs of the Sarcos Dextrous Arm. Results are compared to two stand...

Induction motors are still the most used in industrial applications due to simplicity of installation and low maintenance cost, especially for squirrel cage type. The significant development power electronics terms high-speed technologies electronic switches, their availability high ratings, considerable decrease cost components supports this increase uses. However, changing induction motor's s...