A wireless monitoring system and method for bolt load

A monitoring system and bolt technology, applied in the field of aerospace measurement, can solve the problems of lack of real-time monitoring of the development and change of bolt load, lack of measurement functions, etc., and achieve the effect of solving real-time quantitative measurement problems and strong practicability.

Active Publication Date: 2022-05-24
BEIJING INST OF ASTRONAUTICAL SYST ENG +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In traditional industries, mechanical parts such as bolts usually only exist as structural parts and do not have measurement functions. Lack of real-time monitoring means for the development and changes of

Method used

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  • A wireless monitoring system and method for bolt load
  • A wireless monitoring system and method for bolt load
  • A wireless monitoring system and method for bolt load

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] 1. Measured bolt specifications and sensor performance

[0078] 1. Specifications of the tested bolts

[0079] a) Bolt diameter: ≥8mm;

[0080] b) Optical fiber installation aperture: ≤Φ1.5mm;

[0081] c) Monitoring objects: axial force, shear force, temperature;

[0082] d) Alarm threshold: can be set.

[0083] 2. Fiber Bragg Grating Sensor Performance

[0084] a) Axial force measurement range: 0~5000με;

[0085] b) Axial force measurement accuracy: <±2% F.S;

[0086] c) Shear force measurement range: 0~5000με;

[0087] d) Shear force measurement accuracy: <±5% F.S;

[0088] e) Temperature measurement range: -20℃~+60℃;

[0089] f) Temperature measurement accuracy: <±0.5℃.

[0090] 2. Performance of demodulation system and user data processing system

[0091] 1. Demodulation system performance

[0092] a) Number of sampling channels: ≥4;

[0093] b) Sampling frequency: ≥1Hz (adjustable);

[0094] c) DC power supply: 15V±1.5V;

[0095] d) Power consumption ...

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Abstract

The invention relates to a bolt load wireless monitoring system and monitoring method. The system includes a fiber grating sensor, a demodulation system and a user data processing system. The system has the characteristics of distributed measurement and integrated wireless transmission, and can monitor multiple Real-time measurement of the load change of the bolt, and uploading of monitoring information and issuing of control instructions through wireless communication, realizing remote intelligent monitoring, and solving the problem of real-time quantitative measurement of bolt load; the axial force information of the measured bolt proposed by the present invention And the calculation method of shear force information, combined with the setting position of the fiber grating sensor, can perform real-time calculation on the ground, and can accurately and comprehensively obtain the axial force and shear force information of the measured bolt; solve the problem of real-time quantitative measurement of bolt load in the field of aerospace measurement , and can also be popularized and applied to occasions where bolt loads are measured in other national defense and industrial fields, and has strong practicability.

Description

technical field [0001] The invention relates to a bolt load wireless monitoring system and a monitoring method, and specifically belongs to the technical field of aerospace measurement. Background technique [0002] In the spacecraft structure, a large number of bolts are used to fix various components. These bolts play a very important role in the structure of the entire spacecraft. When the structure is deformed, the load carried by the bolts fixing each component will first change, and in the Under the influence of complex external environmental forces and thermal factors, the change law of bolt load is extremely complex. In addition, there are special measurement requirements for bolt loads in special occasions, such as measuring the axial force and shear force of bolts under instantaneous large load conditions, or long-term monitoring of bolt pre-tightening force changes for long-term robustness of large structures. Analysis and forecasting. In traditional industries,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/24G01L5/24G08C17/02
CPCG01L1/242G01L5/24G08C17/02
Inventor 耿胜男王国辉周广铭夏国江杨华王锋张金刚路娟张大铭李亚群俞达
Owner BEIJING INST OF ASTRONAUTICAL SYST ENG
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