Image capture test device for damage process of pressure-bearing model and use method of image capture test device

Abstract

The invention relates to an image capture test device for the damage process of a pressure-bearing model and a use method thereof, the image capture test device comprises a pressure chamber, a chamber cover is assembled at the opening end of the pressure chamber to form a closed space, an image capture device is fixedly arranged in the pressure chamber towards the damage area of the test model, and an adjusting mechanism drives an underwater high-speed camera to adjust the image capture view; the water injection and drainage system injects and drains water into and out of a closed space outside the test model, and the pressurization system pressurizes the closed space; a pressure sensor for measuring the pressure of the internal closed space is mounted on the cabin wall of the pressure cabin; the image capture device, the water injection and drainage system and the pressurization system are electrically connected to the control system, and start and stop of corresponding actions are controlled by the control system; therefore, the underwater high-speed camera and the test model are placed in the same closed pressure cabin, the underwater high-speed camera records the pressure-bearing damage process and realizes process reproduction, pictures can be analyzed and researched through positioning and recognition technologies, and research promotion and safety guarantee of pressure-bearing equipment are greatly facilitated.

Description

technical field [0001] The invention relates to the technical field of pressure test equipment, in particular to an image capture test device of a pressure model failure process and a method of using the same. Background technique [0002] Underwater equipment is subjected to huge seawater pressure in the deep-sea environment, and it is an important means to ensure the safety and reliability of underwater equipment design to carry out model tests in pressure chambers for strength testing and test verification before service. After the static strength test is completed, the model is crushed through the ultimate bearing test to discover and verify the failure forms and characteristics of various high-strength material structures, and further research on the theory and simulation technology of underwater structure instability. [0003] In the prior art, there are mainly two test methods to study the instability theory and simulation technology of underwater structures: the firs...

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Problems solved by technology

[0003] In the prior art, there are mainly two test methods for underwater structure instability theory and simulation technology research: the first is to paste displacement gauges and strain gauges on the surface of the model to record the mechanical information of the structure during the destruction process. There are disadvantages such as complex layout, limited number of signals passing through the cabin, and inability to directly reflect the information of the whole field; the second is to use the optical measurement method, place the model in a pressure cabin with an observation window, and manually trigger the conventional high-speed camera outside the cabin To record the model failure process for research, this non-contact measurement method has the characteristics of simple operation and full-field measurement

[0004] The existing non-contact optical measurement method places the high-speed camera outside the pressure chamber. Although the high-speed camera has certain safety guarantees, it is only suitable for pressure chambers with observation windows; in addition, for large-scale and high-pressure pressure chambers It is difficult to ensure the safety of the pressure-bearing equipment during the test, whether it is design or manufacture, and it affects the extensive development of related research.

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