Rotating shaft torque measuring device based on surface transverse wave

Abstract

The invention provides a rotating shaft torque measuring device based on a surface transverse wave. The rotating shaft torque measuring device comprises a measuring mechanism and a control mechanism which are matched with each other. The measuring mechanism comprises a rotating shaft body, a first surface transverse wave resonator arranged on the rotating shaft body through a binder and a second surface transverse wave resonator arranged on the rotating shaft body through the binder. The tangential Euler angles of the first surface transverse wave resonator and the second surface transverse wave resonator are characterized in that rotation angles are 0 degree, nutation angles are 38.8 degrees, and precession angles are 90 degrees. The rotating shaft torque measuring device has the advantages that: 1) a frequently-used rayleigh wave mode is no longer simply used for surface acoustic wave mode selection, and a surface transverse wave mode relatively low in propagation loss is adopted, so that the Q values of the resonators are larger, the demodulation accuracy of echo signals is improved, and the torque measuring precision is improved; and 2) the two STW resonators identical in structure are adopted, and the resonators are orthogonally arranged on the surface of the rotating shaft and form + / - 45-degree angles with the axial direction of the rotating shaft, so that the two resonators are arranged in the identical work environment.

Description

technical field [0001] The invention relates to a torque measuring device for a rotating shaft, specifically, on the basis of optimizing the selection of the surface acoustic wave mode, reasonably selecting a surface shear wave (STW) resonance with a small temperature coefficient and a large torque sensitivity through numerical simulation The substrate cutting type of the sensor (STWR) realizes the wireless passive detection of torque through radio frequency excitation and echo detection. Background technique [0002] Rotary power transmission is one of the important means of power transmission in rotary mechanical systems, and the torque variation of mechanical power equipment is an important information of its operating conditions. On the one hand, accurate torque measurement can provide a scientific basis for the design of rotating machinery, and carry out necessary inspections on whether the power output of power machinery meets the design requirements. On the other han...

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Problems solved by technology

These characteristics of STW are also very beneficial to shaft torque measurement, but so far there have been no reports on the use of STW devices for torque measurement

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