Bolt loosening monitoring method and implementation device thereof

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 ...

AI Technical Summary

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 railway lines such as maglev, high-speed rail and subway, the distribution distance of bolts is long and the number is large, so the above method is expensive to implement and cannot be applied to actual projects

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