扭矩传感器
By using a fiber Bragg grating suspended on a composite elastomer in a torque sensor, the problems of complex operation and chirp were solved, achieving efficient and accurate torque detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHIZI LIKONG (NINGBO) TECHNOLOGY CO LTD
- Filing Date
- 2025-08-08
- Publication Date
- 2026-07-17
AI Technical Summary
Existing torque sensors are complex to operate during production, requiring manual attachment of strain gauges, which affects production efficiency and is prone to chirping problems.
A fiber Bragg grating is suspended on a composite elastomer and fixed by anchor point winding. The fiber makes point contact with the inner and outer rings, avoiding chirping problems and simplifying operation.
It improves the accuracy and sensitivity of torque detection, simplifies the production process, avoids chirping, and enhances the deformation of optical fibers.
Smart Images
Figure CN224517980U_ABST
Abstract
Claims
1. A torque sensor, comprising a composite elastomer (100), said composite elastomer (100) comprising an outer ring (101) and an inner ring (102) arranged in a ring and concentrically, and a plurality of strain beams (103) distributed circumferentially and radially connected between the outer ring (101) and the inner ring (102), characterized in that: It also includes an optical fiber (200) for detecting torque signals, the optical fiber (200) having a plurality of Bragg gratings (201) inside; The optical fiber (200) alternately passes through the outer ring (101) and the inner ring (102) and is suspended on the composite elastomer (100) by anchor point winding.
2. The torque sensor of claim 1, wherein: The outer ring body (101) has a plurality of first protrusions (300) protruding along the circumferential direction, and the inner ring body (102) has a plurality of second protrusions (400) protruding along the circumferential direction. The first protrusions (300) and the second protrusions (400) are staggered along the circumferential direction. The optical fiber (200) is wound around the composite elastomer (100) by alternately passing through each of the first protrusions (300) and the second protrusions (400). Each optical fiber (200) between the first protrusions (300) and the second protrusions (400) has a Bragg grating (201).
3. The torque sensor of claim 2, wherein: Each first protruding post (300) is correspondingly disposed at the radial outer end of each strain beam (103); And / or each second protrusion (400) is correspondingly disposed at the radial inner end of each strain beam (103).
4. The torque sensor of claim 3, wherein: The first protrusion (300) and the second protrusion (400) have arc surfaces corresponding to the winding positions of the optical fiber (200).
5. The torque sensor of claim 4, wherein: The optical fiber (200) is fixed to the first protrusion (300) and the second protrusion (400) by point bonding.
6. The torque sensor according to any one of claims 2 to 5, characterized in that: The optical fiber (200) is wound around the second protrusion (400) at an angle greater than 90°.
7. The torque sensor of claim 6, wherein: The optical fiber (200) has a winding angle greater than 90° on the first protrusion (300).
8. The torque sensor according to any one of claims 1 to 5, characterized in that: The inner ring body (102) has a through hole (1021) at its center, and the inner ring body (102) has a through hole (1022) that allows the end of the optical fiber (200) to pass through.