Gas cylinder tester with digital image analysis external measuring method

Abstract

The invention provides a gas cylinder tester with a digital image analysis external measuring method, belonging to the technical field for measuring the quality of a gas cylinder. The gas cylinder tester is formed by the connection and the assembly of a digital camera shooting part, an image analysis software part, a pressure measuring part, an electric control part and a microcomputer tracking part. The gas cylinder tester is technically characterized in that the volume change of the gas cylinder caused by the pressure is measured by means of an image method, and the measurement method is dry measurement and is free of contact. The image of the gas cylinder is processed with the image processing method such as image denoising, fitting, edge measuring and the like; and the deformation quantity is computed with the three-dimensional simulating and modeling of a procedure, i.e. the full deformation quantity and the residual deformation quantity of the gas cylinder, and the residual deformation rate is computed. The gas cylinder tester solves the problem that the other external measuring method is easily influenced by the external condition, breaks through the influence and the restriction of the conventional weighing external measuring method and the correlative gas cylinder water pressure tester to the development of the industry of the gas cylinder to some extent, improves the test precision, leads the test operation to be convenient and a result to be visual, and is ideal equipment for the gas cylinder to perform the external measuring water pressure test.

Description

technical field [0001] Gas cylinders are mobile pressure vessels used internationally. They are used in a wide range and range, and can be filled repeatedly. There are tens of millions of steel seamless gas cylinders in service in my country. With the implementation of the environmental protection vehicle project and the popularization and application of natural gas vehicles in China, the use of gas cylinders is also increasing day by day. The medium stored in the gas cylinder includes oxygen, nitrogen, hydrogen, oil and natural gas and other high-pressure gases. In order to reduce the possibility of property loss and personal casualties caused by gas cylinder leakage or explosion, it is necessary to conduct regular hydrostatic tests on the gas cylinders before they leave the factory and the gas cylinders in service to determine the elastic and plastic deformation of the gas cylinders. The hydrostatic test of the gas cylinder can accurately obtain the total deformation of th...

AI Technical Summary

Problems solved by technology

[0010] The traditional method of using a water jacket outside the gas cylinder is easily disturbed by external conditions, and there are factors that cause errors such as the difficulty in measuring the change in the water volume in the water jacket accurately.

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