Device and method for monitoring hydraulic blasting of composite gas cylinder on basis of acoustic emission technique

Abstract

The invention relates to the field of damage detection of composite gas cylinders and aims to provide a device and a method for monitoring hydraulic blasting of a composite gas cylinder on the basis of an acoustic emission technique. The device comprises a water pump connected to the composite gas cylinder through a pipe, wherein a pressure gauge and a pressure sensor are arranged on the pipe, anda water pump adjusting system is connected with the pressure sensor and the water pump respectively through signal lines; the composite gas cylinder is placed horizontally, and eight broadband sensors connected with an acoustic emission detection system through signal lines are arranged on the surface of the cylinder body; the acoustic emission detection system acquires acoustic emission signalsfrom the broadband sensors and pressure change data from the pressure sensor simultaneously. With adoption of the device and the method, acoustic emission amplitudes and change trend of energy signalparameters with pressure in a blasting process of the composite gas cylinder can be obtained, so that change conditions of fiber breaking and matrix cracking distinguished by acoustic emission signalfrequency under different pressure can be analyzed, and damage state of the gas cylinder can be evaluated effectively.

Description

technical field [0001] The invention relates to the field of damage detection of composite material gas cylinders, in particular to a monitoring device and method for hydraulic blasting of composite material gas cylinders based on acoustic emission technology. Background technique [0002] Carbon fiber composite gas cylinder is an important part of new energy vehicles, which has the characteristics of light weight, high strength, good fatigue resistance and corrosion resistance. A major problem facing the development and promotion of new energy vehicles is the damage inspection of vehicle gas cylinders. Once a gas cylinder explodes, it often seriously endangers people's lives. Therefore, in order to conduct regular damage inspections on gas cylinders, it is first necessary to explore the damage mode and damage characteristics during the blasting process of composite gas cylinders. [0003] At present, the application of acoustic emission technology in the field of non-destr...

AI Technical Summary

Problems solved by technology

Acoustic emission technology can effectively monitor the damage process of gas cylinders, but the noise and vibration of water flow charging and discharging in the process of hydraulic blasting will affect the acoustic emission signal, and the blasting of gas cylinders may cause damage to acoustic emission devices such as sensors and preamplifiers. destruction

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