Torque optical fiber sensor

A fiber optic sensor and sensor technology, which is applied in the field of testing technology and fiber optic sensors, can solve the problems of troublesome testing, complexity, and low accuracy, and achieve the effects of simple structure, anti-electromagnetic interference, and low cost

Inactive Publication Date: 2008-06-04
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of troublesome, complicated and low-precision testing in the traditional measuring method, and to invent a new optical fiber tor

Method used

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  • Torque optical fiber sensor

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Embodiment

[0019] A novel torque fiber optic sensor of the present invention includes a guide fiber 1, two torsion bars 2, 3, a long-period fiber grating or fused cone fiber 5, and a spring 4. The torsion bar 2 is connected to the torsion bar 3 through a spring 4, and the sensing optical fiber passes through the central axis of the two torsion bars and is respectively fixed at the ends of the two torsion bars. Among them, two torsion bars are connected by springs. The role played by the spring is not only the connection function, but also the reset function, that is, when there is no relative rotation between the two torsion bars, the spring can ensure that the two torsion bars are in the initial position. see picture 1. ,

[0020] In the embodiment shown in FIG. 2 , the light emitted by the light source 9 enters the optical fiber 1 , passes through the sensing optical fiber 5 , and is received by the optical detector 10 . A permanent magnet 6 is installed at the end of the torsion ba...

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Abstract

The invention relates to a novel torque optical fiber sensor and belongs to the test technology and optical fiber sensor field. The invention adopts a long-period optical fiber grating or a fused-tapered optical fiber as a measuring element; when the long-period optical fiber grating or the fused-tapered optical fiber is acted by the torque, the period of the long-period optical fiber grating or the optical intensity or the spectrum of the fused-tapered optical fiber can be changed, thereby measuring the torque value. The sensor is formed by a guiding optical fiber, a torsion rod (2), a torsion rod (3), a long-period optical fiber grating or a fused-tapered optical fiber (5), and a spring (4), wherein, two torsion rods (2) and ( 3) are connected by the spring (4) and can relatively be rotated. The long-period optical fiber grating or the fused-tapered optical fiber which are used for sensing are respectively fixed on the torsion rod (2) and the torsion rod (3). In addition, one torsion rod of the torque sensor is provided with a magnet which can form an optical fiber revolution sensor based on the torque measurement with a opposite polarity magnet which is arranged on a rotary mechanism.

Description

technical field [0001] The invention belongs to the field of testing technology and optical fiber sensors, and in particular relates to the design of a novel torque optical fiber sensor and a scheme for realizing the design principle. Background technique [0002] In the mechanical transmission system, torque is one of the most typical mechanical quantities that reflect the performance of the production equipment system. Torque measurement and analysis are important means to ensure the safe and normal operation of various production and auxiliary equipment, save energy, and improve system efficiency. Improving the accuracy of torque measurement, the real-time performance of torque monitoring and control, and the reliability of torque abnormality analysis is an important means to reduce accidents and make production go on normally. [0003] With the advancement of science and technology and the development of production, torque measurement technology has broad application pro...

Claims

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Application Information

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IPC IPC(8): G01L3/08
Inventor 江毅张佛健
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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