Torque sensor and detecting system for electric bicycle

Abstract

The invention provides a torque sensor and detecting system for an electric bicycle. The torque sensor comprises a center shaft, a strain sleeve and a transmission sleeve, wherein the strain sleeve and the transmission sleeve are arranged on the center shaft in a sleeving mode. At least two rows of strain detecting portions arranged at intervals are integrally formed on the strain sleeve in the axial direction. The torque sensor further comprises an induction coil arranged on the periphery of the strain detecting portions, and a signal processor connected with the induction coil. The detecting system comprises the torque sensor, a magnetic ring fixed on the center shaft or the strain sleeve or the transmission sleeve, and a Hall sensor used for detecting the rotating speed of the magnetic ring. The transmission sleeve can reduce the impact of external stress on the strain sleeve, reduce abnormal signal output and avoid damage to the strain sleeve. The strain detecting portions are integrally formed on the strain sleeve, so that the accuracy, stability and reliability of torque detection are improved, the preparation process difficulty of the strain sleeve is lowered, and application and popularization prospects in the industry are good.

Description

Technical field [0001] The invention relates to the field of electric bicycles, in particular to a torque sensor and a detection system for electric bicycles. Background technique [0002] At this stage, more and more electric bicycles are equipped with torque sensors on the central axle, so that the motor output power of the electric bicycle can be adjusted according to the measured torque during riding. A measurement method has been disclosed in the industry. A magnetic ring is provided on the sliding sleeve through a fixed sleeve, a sliding sleeve and a compression spring that are matched with the central shaft, and the rotation of the magnetic ring is detected by a displacement sensor to convert the corresponding torque into an electrical signal. . However, the above-mentioned torque measuring device has a complicated structure, and the actual displacement of the sliding sleeve and the magnetic ring under the action of the torque is small, which makes it difficult to obtain ...

AI Technical Summary

Problems solved by technology

However, there must be seams in the above-mentioned magnetic permeable alloy flakes, the torque of the magnetic permeable alloy flakes at the joints is not uniform, and the detection signal is unstable; Attached to the surface of the torque sleeve, and long-term reciprocating rotation may also cause local peeling, affecting the stability of torque detection

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