Bolt loosening monitoring method and implementation device thereof

A bolt loosening and monitoring device technology, which is applied in the field of data acquisition method and device, detection, and monitoring whether structural bolts are in a loose state, can solve the problems of long distribution distance of bolts, high implementation cost, and large quantity

Inactive Publication Date: 2014-03-12
TONGJI UNIV
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  • Claims
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Problems solved by technology

Although its technical solution is effective, it is only suitable for individual important equipment and key locations, and requires complex lines and power supply guarantees
For the bolt monitoring problem of ra

Method used

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  • Bolt loosening monitoring method and implementation device thereof
  • Bolt loosening monitoring method and implementation device thereof
  • Bolt loosening monitoring method and implementation device thereof

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0033] figure 1 It is a component structure diagram of a specific embodiment of the bolt loosening monitoring system provided by the present invention. It judges the looseness of bolts by monitoring the tension of the screw. If the tension of the screw is lower than the safety threshold, it is determined that the bolt is loose and an early warning signal is issued.

[0034] The bolt loosening monitoring system includes a piezoelectric sensing element 1 (including a piezoelectric material 7 and a metal coating electrode 6 ), a passive RFID electronic tag 2 , an RFID reader 3 , and a data management analysis and feedback alarm module 4 .

[0035] The piezoelectric material 7 in the piezoelectric sensing element 1 is connected to the passive RFID electronic tag 2 through the metal-coated electrode 6 . The passive RFID electronic tag 2 and the R...

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Abstract

The invention discloses a bolt loosening monitoring method and an implementation device thereof. According to the method, a bolt loosening situation is determined by monitoring the tension of a screw; if the tension of the screw is lower than a safety threshold value, the bolt is determined to be loosening. A piezoelectric sensing element is arranged between a screw cap and a connected component, and is used for monitoring the change of the tension of the screw in a using process of the bolt, acquiring the feedback response signal under the change, comparing the feedback response signal with a preset safety threshold value, and analyzing to determine the bolt loosening situation; if the tension of the screw is lower than the safety threshold value, the bolt is determined to be loosening, and an early-warning signal is sent out. The bolt loosening monitoring device for implementing the method comprises the piezoelectric sensing element, a data acquisition element, data reading equipment, and a data management analysis and feedback alarm module. By the method and the device, the bolt loosening state can be examined remotely and quickly; the main body of the monitoring device can be detached and replaced; the original structure is little influenced; the method and the device are suitable for large structural bolt monitoring; the manpower and energy resources are saved; the cost and the operating cost are low.

Description

technical field [0001] The invention belongs to the technical field of structural engineering and detection, and relates to a detection and data collection method and device, in particular to a method and device for monitoring whether structural bolts are in a loose state. Background technique [0002] Virtually every engineered product, no matter how complex its composition, requires the use of threaded fasteners. An important advantage of threaded fasteners over most other joining methods is their ability to be disassembled and reused. However, since threaded fasteners are prone to self-loosening, thread self-loosening has been an unresolved problem since the industrial revolution. Although in the last 150 years, a large number of solutions have been introduced to the problem of thread loosening. Accidents directly caused by loose threads occur in several civil or industrial fields, some of them catastrophic. [0003] There are currently two types of inspection methods ...

Claims

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Application Information

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IPC IPC(8): G01L5/00
Inventor 谢丽宇宋琛琛薛松涛
Owner TONGJI UNIV
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