Torque detection sensor and detection method for small spaces

By designing a beam structure and using temperature compensation in a small space, the problem of XY-axis torque coupling to Z-axis torque in existing sensors in small spaces was solved, achieving high-sensitivity and high-resolution three-dimensional torque detection.

CN122149708APending Publication Date: 2026-06-05SHANGHAI ZHUODAO MEDICAL TECH CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI ZHUODAO MEDICAL TECH CO LTD
Filing Date
2026-03-26
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing Z-axis torque sensors suffer from interdimensional coupling issues between XY-axis torque and Z-axis torque when dealing with scenarios with high torque. Furthermore, increasing the sensor diameter takes up space, affecting sensitivity and resolution, making it difficult to apply effectively in small-space environments.

Method used

Design a torque detection sensor for small spaces. It adopts a structure of three beams stacked along the axial direction, with strain gauges installed on each beam. The influence coefficients of the torque on the X, Y, and Z axes are determined by linear equations and pre-calibrated parameters. Temperature compensation is performed in conjunction with a temperature detector.

Benefits of technology

It achieves high-sensitivity three-dimensional torque detection in a small space, reduces the interdimensional coupling between XY-axis torque and Z-axis torque, improves resolution, and effectively avoids errors caused by temperature changes.

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Abstract

The application discloses a torque detection sensor for small space and a detection method. The torque detection sensor for small space comprises a plurality of strain gauges and three beam bodies, i.e. a first beam body, a second beam body and a third beam body, stacked along an axial direction; each of the beam bodies comprises an outer ring body, an inner connecting body and at least two pairs of connecting beams connected to the outer ring body and the inner connecting body at two ends respectively, wherein the two pairs of connecting beams are arranged at intervals; the thickness of the connecting beams on the first beam body and the third beam body along the axial direction is smaller than the width along the radial direction, wherein the width along the radial direction is slightly larger than the width of the strain gauge for attaching the strain gauge; the thickness of the connecting beams of the second beam body along the axial direction is larger than the width along the radial direction, and the thickness of the connecting beams along the axial direction is slightly larger than the thickness of the strain gauge for attaching the strain gauge.
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