Optical fiber grating sensing measuring method and device for detecting running state of rotating machine

A fiber grating and operating state technology, applied in the field of sensors, can solve the problems of electromagnetic interference of photoelectric sensors, impossible to accurately grasp the operating state, complicated operation, etc., and achieve the effects of no electromagnetic interference, simple structure, and high measurement stability.

Inactive Publication Date: 2008-01-23
WUHAN UNIV OF TECH
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Problems solved by technology

However, it is cumbersome to set up a neural network for calculation in this method, and it is impossible to accurately grasp the running status in this indirect way, and in addition, the photoelectric sensor used is susceptible to electromagnetic interference

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  • Optical fiber grating sensing measuring method and device for detecting running state of rotating machine

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Embodiment Construction

[0013] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0014] As shown in Figures 1 and 2, the fiber grating sensing detection method and device for detecting the running state of a rotating machine in the present invention mainly include a light source 1, a fiber grating demodulator 2, a Y-type coupler 3, a transmission fiber 4, a support frame 5, Front collimator 6, rear collimator 7, rotating object 8, transmission fiber 9, fiber grating sensor 10, motor 11, motor spindle 12, fiber grating sensor 10 and transmission fiber 9 are pasted or embedded in the rotating body during detection 8, when the operating state of the rotating body 8 changes, it will cause a change in the grating pitch of the sensing grating, resulting in a shift in the wavelength of the reflected light of the sensing grating, and the reflected light passes through the transmission fiber 4, and then the light emitted by the quas...

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Abstract

The invention provides an optic-fiber linear-scale sensing and detecting method and arrangement for detecting the operation status of a rotary machine. The method comprises the following procedures: an optic-fiber linear-scale sensor is fixed on a rotary body by adhering or embedding way; the reflection wavelength of the optic-fiber linear-scale sensor is demodulated by an optic-fiber linear-scale demodulator; or a plurality of linear scales can be installed on different positions on the rotary object, when the operation state of the rotary object is steady, the light wave reflected by the sensing linear scale is constant; when the operation state of the rotary object changes, the light wave reflected by the sensing linear scale will change correspondingly, the wavelength info of the sensing linear scale is sent into the optic-fiber linear-scale demodulator for analysis and processing. In this way, the distribution of the states of a plurality of points on the rotary object can be analyzed, and contactless long-term real-time detection of the rotary object can be realized. The invention is of simple structure, easy to install, of high steadiness, and strong resistance to magnetic interference.

Description

Technical field: [0001] The invention relates to a fiber grating sensing detection method for non-contact detection of the running state of a rotating machine, which is mainly used for non-contact real-time on-line detection of the running state of a rotating body in the machine, and belongs to the technical field of sensors. technical background: [0002] The working condition of rotating machinery is related to the normal operation of the entire mechanical equipment, especially the real-time monitoring of the stress, strain, vibration and temperature of key parts of large-scale high-speed rotating machinery, which is very necessary for safe production. For a long time, the online monitoring of the running state of the rotating machine has not been solved, so the present invention has great significance for the online monitoring of the running state of the rotating machine. An effective and complete monitoring system can judge the working status of the rotating body, grasp ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/26G01D5/38
CPCG01D5/35303G01D2205/40
Inventor 周祖德刘泉姜德生戴珩许儒泉甘维兵陆竟晓
Owner WUHAN UNIV OF TECH
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