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Method and system for detecting fastening state between structural parts connected by fastening structure

A fastening structure and detection system technology, applied in the testing of machines/structural components, vibration measurement in solids, testing of mechanical components, etc., can solve problems such as multi-system resources, difficulties, and inability to analyze fastening relationships

Active Publication Date: 2020-07-07
ZHEJIANG FUTURE TECH INST JIAXING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The signal conversion from the time domain to the frequency domain consumes a lot of system resources. In some applications such as the Internet of Things, it is difficult to use battery power to implement, and the cost is also high. It is difficult to apply to applications that require a large number of monitoring
On the other hand, it is theoretically feasible to establish a database of vibration signals without loosening, but it requires the accumulation of long-term historical data. In the case of different external excitations, such as excitations of different wind forces and wind directions, the vibration of structural parts The frequency changes are complicated, and it is difficult to establish a complete database
[0006] The patent application with the application publication number CN107024343A discloses a GIS pot insulator fixing bolt loosening test system, which specifically uses the time-domain signal difference of two vibration signals in the same structure to analyze the vibration propagation mode, but this is only the same Vibration propagation in a structure cannot be used to analyze the fastening relationship between two structures

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  • Method and system for detecting fastening state between structural parts connected by fastening structure
  • Method and system for detecting fastening state between structural parts connected by fastening structure
  • Method and system for detecting fastening state between structural parts connected by fastening structure

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Embodiment 1

[0038] This embodiment shows a method and system for detecting a fastening structure through welding. In this embodiment, the vibration sensor is an acceleration sensor. Such as figure 1 As shown, the first structure P 1 with the second structural member P 2 fastened by welding. In this embodiment, the welds between the two structural members are monitored in sections, which are denoted as D 1 ,D 2 ,...,D n .

[0039] Example of monitoring the first weld segment D 1 The fastening state of the first structural member P 1 It is the main source of vibration, such as a motor installed on it. The first structure P 1 Up close to the first weld segment D 1 The position to install the first vibration sensor V 11 , the discrete signal of the collected vibration parameter is a 11 (k), k=1,2,3,...,N, k represents the serial number of the discrete signal of the vibration parameter on the time axis, the same k value represents the same discrete time; on the second structural me...

Embodiment 2

[0051] This embodiment shows a method and system for detecting fastening structures connected by bolts. Such as figure 2 As shown, the structure P 1 and structure P 2 between bolts D 1 and bolt D 2 connect.

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Abstract

The invention discloses a method and a system for detecting the fastening state between structural parts connected by a fastening structure. Install at least one vibration sensor on a structural part for collecting vibration parameters of the structural part; install at least one other vibration sensor on another structural part or a fastening structure between structural parts for collecting another Vibration parameters of the structural parts or the fastening structure between the structural parts; judging the fastening state of the fastening structure according to the vibration parameters. The method and system reduce power consumption and cost while ensuring the acquisition of fastening states between structural components.

Description

technical field [0001] The invention belongs to the field of structural fastening state detection, and in particular relates to a fastening state detection method and system between structural parts connected by a fastening structure. Background technique [0002] The fastening installation between structural parts is a ubiquitous technical means, such as fastening two structures by bolts, welding or bonding, so as to achieve the purpose of fixing the structure or transmission. In some fields, the stability of the fastening relationship between structural parts involves personal and property safety, so it is extremely important to detect whether the fastening between structural parts is firm. [0003] The loose bolts on the transmission line tower will cause the tower to vibrate more when the strong wind blows outside, and further loosen the bolts during the vibration. It needs to be found and tightened in time to avoid the risk of the tower falling down. At present, the me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/00G01H17/00
CPCG01H1/00
Inventor 刘双文
Owner ZHEJIANG FUTURE TECH INST JIAXING