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Intelligent bolt based on optical fiber optical coherence sensor

A fiber optics, smart bolt technology, applied in the field of sensors to ensure mechanical strength, achieve long-term reliability, and save costs

Pending Publication Date: 2021-02-19
SHANGHAI BAIANTEK SENSING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above technology has the following defects: 1. How to ensure the real-time online intelligent monitoring of bolts; 2. How to realize the long-term reliability of the bolt detection sensor, the reliability during use, anti-vibration, not affected by high and low temperature, waterproof, Dustproof; 3. How to realize that the bolt detection sensor can be deformed synchronously with the bolt, and the sensor has an ultra-high measurement accuracy; 4. How to realize the low cost of the bolt detection sensor and can be mass-produced

Method used

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  • Intelligent bolt based on optical fiber optical coherence sensor
  • Intelligent bolt based on optical fiber optical coherence sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: See Figure 1-2 , a smart bolt based on a fiber optic coherent sensor, comprising a plug structure 1 and an alloy hollow structure 8, the outer surfaces of the upper and lower parts of the alloy hollow structure 8 are respectively processed with thread one 2 and the thread two 6, The detection sensor is fixed on the bolt through the first thread 2 and the second thread 6, the plug structure 1 is fixed on the alloy hollow structure 8, and the fiber optic coherent sensor 4 is fixed on the 42CrMo alloy hollow structure through the welding fixing hole 5 8, the tail end optical fiber of the fiber optic coherent sensor 4 is fixed in the inner hole of the alloy hollow structure 8 through the connector 9, and the fiber ferrule 10 is arranged above the connector 9.

[0027] The manufacture process of the present invention is as follows:

[0028] Step 1. Using 42CrMo alloy hollow structural parts as the outer structure, it is formed by finishing. Since the material o...

Embodiment 2

[0036] Embodiment 2: On the basis of Embodiment 1: a flange is built on the sensor above the connector 9, and the flange can increase the sealing effect and increase the detection accuracy.

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PUM

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Abstract

The invention discloses an intelligent bolt based on an optical fiber optical coherence sensor. The intelligent bolt comprises a plug structure and an alloy hollow structural member. A first thread and a second thread are machined on the outer surface of the upper portion and the outer surface of the lower portion of the alloy hollow structural member respectively, and a detection sensor is fixedto the bolt through the first thread and the second thread. The plug structure is fixed on the alloy hollow structural member. The optical fiber optical coherence sensor is fixed on the CrMo alloy hollow structural member through a welding fixing hole, an optical fiber at the tail end of the optical fiber optical coherence sensor is fixed in an inner hole of the alloy hollow structural member through a socket connector, and an optical fiber plug core is arranged on the upper side of the socket connector. According to the intelligent bolt, the optical fiber optical coherence sensor is arrangedin the intelligent bolt monitoring sensor, the advantage of ultrahigh-precision distance measurement of the optical fiber optical coherence sensor can be brought into full play, and the measurement precision can reach + / -0.05%. The intelligent monitoring precision, linearity and sensitivity of the bolt can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a smart bolt based on a fiber optic coherent sensor. Background technique [0002] Bolts are the most commonly used connecting parts for large buildings, steel structures, and large equipment, and are widely used. The failure of bolted connections has become the main factor affecting the safety of steel structures. Accurate monitoring of the working state of bolts is critical to the continued safe operation of equipment. Intelligent bolt online real-time monitoring can detect the current pre-tightening force value of the bolt connection, and perform fault diagnosis on whether the bolt connection is loose or overloaded. Early warning of potential failures can be carried out to avoid major accidents. However, there are few effective real-time monitoring methods on the market at present. [0003] In order to solve the technical problem that the bolt load and looseness that have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16M13/02G01B11/16G01L1/24
CPCF16M13/02G01B11/16G01L1/242
Inventor 刘昌霞凌晶芳李伟伟钟少龙王新中李健
Owner SHANGHAI BAIANTEK SENSING TECH CO LTD