Bolt load wireless monitoring system and monitoring method

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 and lack of measurement functions, etc., and achieve the effect of real-time quantitative measurement and strong practicability

Active Publication Date: 2020-04-10
BEIJING INST OF ASTRONAUTICAL SYST ENG +1
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  • Abstract
  • Description
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  • Application Information

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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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  • Bolt load wireless monitoring system and monitoring method
  • Bolt load wireless monitoring system and monitoring method
  • Bolt load wireless monitoring system and monitoring method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] 1. The measured bolt specifications and sensor performance

[0078] 1. Specifications of bolts to be tested

[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) Measuring range of axial force: 0~5000με;

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

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

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

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

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

[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 comprises a fiber bragg grating sensor, a demodulation system and a user data processing system; the system has the characteristics of distributed measurement and integrated wireless transmission, can measure the load change conditions of a plurality of bolts on a component in real time, uploads monitoring information and issues a control instruction in a wireless communication mode, realizes long-distance intelligent monitoring, and solves the problem of real-time quantitative measurement of thebolt load. According to the method for calculating the axial force information and the shearing force information of the measured bolt, the setting position of the fiber grating sensor is combined, real-time calculation of the ground can be carried out, and the axial force information and the shearing force information of the measured bolt can be accurately and comprehensively obtained. The systemsolves the problem of real-time quantitative measurement of the bolt load in the spaceflight measurement field, can also be popularized and applied to other national defense and industrial fields formeasuring the bolt load, and has high practicability.

Description

technical field [0001] The invention relates to a bolt load wireless monitoring system and a monitoring method, specifically belonging to the technical field of aerospace measurement. Background technique [0002] A large number of bolts are used in the spacecraft structure to fix the components. These bolts play a very important role in the structure of the entire spacecraft. When the structure deforms, the load carried by the bolts that fix the components will change first, and in the Under the influence of external complex environmental forces and thermal factors, the variation law of bolt load is extremely complicated. 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 monitoring the long-term robustness of large structures through long-term monitoring of changes in bolt pretightening force. Analysis and Forecasting. In trad...

Claims

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Application Information

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Patent Type & Authority Applications(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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