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Multi-channel Ultrasonic Bolt Preload Testing System

A bolt pretightening force and testing system technology, applied in force/torque/work measuring instrument, torque/torsion force measurement during tightening, measuring device, etc., can solve problems such as the limitation of bolt group pretightening force test and save Cost and space, stable signal transmission and reception, effect of stable real-time monitoring

Active Publication Date: 2020-12-11
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above studies are all single-channel preload tests, and there are limitations to the preload tests of bolt groups.

Method used

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  • Multi-channel Ultrasonic Bolt Preload Testing System
  • Multi-channel Ultrasonic Bolt Preload Testing System
  • Multi-channel Ultrasonic Bolt Preload Testing System

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Experimental program
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Effect test

Embodiment Construction

[0019] Conjunction with the drawings and the technical solutions further illustrate specific embodiments of the present invention.

[0020] Combine figure 1 , The present invention includes a PC terminal, STM32F4, FPGA, DA module, a channel controller, probe fixture, bolt smart oscilloscope. In the present invention, the PC control center, through the RS232 serial communication with STM32F4, STM32F4 via bus communication with the FGPA, using DA waveform output module. The output waveform is connected via BNC cable channel controller and, through the logic gate control signal into a single-channel 8-channel waveform excitation, the excitation corresponding smart bolts. Smart bolt signal generated by a high-frequency signal line is connected to the oscilloscope, the oscilloscope and the PC connected to the network cable. Wherein the intelligent bolts are rigidly connected to the ultrasound probe through the probe fixing means.

[0021] Structure gist of the invention are: multi-chan...

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Abstract

The invention discloses a multi-channel ultrasonic bolt pre-tightening force test system. In the invention, multi-channel emission and reception are realized, the optimal processing of an excitation signal is achieved, and the fixation and the real-time monitoring of an ultrasonic probe are realized, and the system has the characteristics of high performance and low cost. Through designing a channel controller, a single signal output port can be used to control the eight channels of intelligent bolt pre-tightening force tests so that cost and a space are greatly saved; and simultaneously a signal optimization processing module is used to output an optimum excitation waveform; and in order to realize the real-time monitoring of a pre-tightening force, a probe fixing device is designed so that the ultrasonic probe can stably emit and receive signals.

Description

Technical field [0001] The present invention belongs to the technical field of detection preload, particularly for a multi-channel ultrasonic bolt preload test system. Background technique [0002] As usual bolt connections, it is widely used in engineering. Its axial preload applied thereto performance, life has a great influence. Bolt and the bolt in the manner set often occurs, they tend to exhibit characteristics of the elastic interaction. A plurality of internal stress measurement of a bolt, can prevent accidents and ensure uniformity of the surface by the binding force, the size and structure optimization bolted quality. Therefore, accurate real-time measurement of a bolt preload group of more and more attention. [0003] At present, intelligent structure of a piezoelectric-based get the attention of many scholars. Torque wrench controlled by a control law input torque bolt preload; Tao et designed based piezoelectric sensor bolt preload inversion time, to reflect the size...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L5/24
CPCG01L5/246
Inventor 孙清超袁博孙伟李小冬
Owner DALIAN UNIV OF TECH