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Tail-fiber-free optical fiber intelligent bolt and state monitoring method

An optical fiber intelligence and bolt technology, applied in the directions of screws, threaded fasteners, and optical devices to transmit sensing components, can solve the problems of environmental temperature sensitivity, poor flexibility, inconvenient disassembly and assembly, and achieve low cost and stable overall structure. , the effect of high reliability

Active Publication Date: 2022-05-13
CHENGDU KAITIAN ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the common fiber optic smart bolts generally have two deficiencies: first, the fiber optic sensor is mostly a fiber grating stress sensor, which is sensitive to ambient temperature and drifts seriously, requiring an additional temperature sensor for compensation; second, the bolt Need to bring an optical fiber, inconvenient to disassemble, poor flexibility

Method used

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  • Tail-fiber-free optical fiber intelligent bolt and state monitoring method
  • Tail-fiber-free optical fiber intelligent bolt and state monitoring method
  • Tail-fiber-free optical fiber intelligent bolt and state monitoring method

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Embodiment Construction

[0029] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0030] Such as Figure 1 to Figure 5 As shown, the pigtail-free optical fiber smart bolt of this program includes a bolt body 1, the head of the bolt body 1 is provided with a probe installation hole 3 toward the screw rod, and the bottom of the probe installation hole 3 is provided with a thin hole 2 toward the screw rod. A sensing fiber 6 is arranged in the hole 2, and a metal tube 5 is sheathed on the sensing fiber 6, an...

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Abstract

The invention discloses a pigtail-free optical fiber intelligent bolt and a state monitoring method.The intelligent bolt comprises a bolt body, a slim hole is formed in the bottom of a probe mounting hole in the direction of a screw, a sensing optical fiber is arranged in the slim hole, the sensing optical fiber is sleeved with a metal pipe, and an air gap is formed between the metal pipe and the sensing optical fiber; an optical fiber F-P sensor is arranged in the middle of the sensing optical fiber, the upper end and the lower end of the sensing optical fiber are welded to the metal tube through glass solder, a probe seat is arranged in the probe mounting hole, and the guide optical fiber is connected with the optical fiber interface. The state monitoring method comprises the steps S1-S5, the optical F-P resonant cavity is used for detecting the stress borne by the bolt, the detection effect is more accurate, the optical F-P resonant cavity is pre-embedded in the bolt body, and machining and manufacturing are convenient; through the detachable probe seat with the focusing lens, free disassembly can be realized, and flexibility and convenience are realized.

Description

technical field [0001] The invention relates to the technical field of bolts, in particular to a tailless optical fiber smart bolt and a state monitoring method. Background technique [0002] Bolts are widely used in the connection of various detachable parts, and are widely used in industries such as machinery, transportation, electric power, aerospace, civil engineering, and chemical industry. With the continuous improvement of road network power, industrial connections have put forward higher requirements for bolts, and smart bolts are a device that can intelligently detect bolt looseness. Intelligent detection of whether the bolts of the device are fastened can reduce potential safety hazards and property losses caused by loose bolts. At present, a large number of smart bolts have been put into use. With the development of smart bolts, the industry needs smart bolts to be used at higher temperatures, especially in aerospace, petroleum and other fields. [0003] Smart ...

Claims

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Application Information

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IPC IPC(8): G01L1/24G01K11/3206G01D5/26F16B35/06
CPCG01L1/246G01K11/3206G01D5/268F16B35/06
Inventor 谭银银代勇波王伟鉴万李涛郑斯颃岳立刘晨刚彭鹏
Owner CHENGDU KAITIAN ELECTRONICS
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