On-line non-contact monitoring method and device for curing state of coating

Abstract

The invention belongs to the technical field of material curing monitoring, and particularly relates to an on-line non-contact monitoring method for the curing state of a coating. The method comprises: according to curing process requirements of a curing material, putting a material to be cured into a proper constant-temperature environment; emitting exciting laser to the to-be-cured material; exciting the excitation laser on the surface of the to-be-cured material to generate ultrasonic waves and propagates on the surface and inside the to-be-cured material; transmitting and receiving laser to the to-be-cured material, receiving ultrasonic waves on the surface of a to-be-cured material by receiving laser, analyzing the amplitude and arrival time of the received ultrasonic waves, and calculating the change of the ultrasonic sound velocity and sound attenuation coefficient in the curing process of the to-be-cured material by utilizing the amplitude and arrival time of the ultrasonic waves so as to represent the curing process and different curing states of the to-be-cured material; emitting excitation laser to the material to be cured to excite the surface of the material to be cured to generate ultrasonic waves, and receiving the ultrasonic waves by receiving the laser, so that non-contact remote monitoring of the material to be cured is realized.

Description

technical field [0001] The invention belongs to the technical field of material curing monitoring, and in particular relates to an online non-contact monitoring method and device for the curing state of a coating. Background technique [0002] The curing characteristics of the composite and the final properties of the material depend primarily on the thermodynamic and chemorheological properties of the matrix. Loss of control during the curing process will lead to matrix grid structure defects, microscopic distortions, and macroscopic defects such as pores, air bubbles, debonding, and fiber damage, such as solid rocket motors. Therefore, effective monitoring during the curing cycle of composite materials will directly determine the final mechanical properties of materials and product quality. [0003] There is a complex internal process in the curing operation of composite materials. How to determine the best process conditions to make the production quality the best and th...

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Problems solved by technology

In the patent application number "200810047228.0", an ultrasonic detection system is proposed. During the detection, the probe in the system needs to be in contact with the material to be cured, but in reality, most of the curing of the material to be cured needs to be carried out at high temperature. It will cause large errors in the detection of the probe, and even damage the probe. Therefore, the system is not suitable for high-temperature curing environments. At the same time, the probe is in contact with the material to be cured, and part of the material to be cured will be bonded to the probe.

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