Impact polarization voltage experiment device and method for conductor and insulator materials

Abstract

The invention discloses an impact polarization voltage experiment device and method for conductor and insulator materials, which relate to the technical field of impact polarization voltage experiments of materials. The device comprises a first-stage light gas gun loading system, a speed measurement system and a voltage measurement system. The method comprises the following steps of carrying out insulation treatment on the outer surface of a to-be-tested piece, after each experimental device is adjusted, enabling the projectile to obtain kinetic energy and then sequentially pass through a speed measurement system and a voltage measurement system, and recording data of impact polarization voltage of the test piece, and meanwhile, acquiring the state of the test piece and the impulse polarization voltage time-history curve of the test piece. A combined system is adopted, the outer surface of the to-be-tested piece is insulated, the test piece is isolated from ambient gas to avoid chargeleakage, and meanwhile, the influence of a high-speed motion excitation magnetic field of the projectile body on the impact voltage measurement result of the test piece is avoided, so that the test result is prevented from being influenced by air and impact polarization charges of a lining plate on the bracket, and the accuracy of test results is improved.

Description

technical field [0001] The invention relates to the technical field of impulse polarization voltage experiments, in particular to an apparatus and method for impulse polarization voltage experiments of conductors and insulator materials. Background technique [0002] There is no free charge inside the ideal insulating medium, but there is always a small amount of free charge inside the actual dielectric. In general, the medium is not electrically apparent macroscopically. Under the action of external excitation, the local movement of the bound charges can lead to the macroscopic display of electrical properties, and the appearance of charges on the surface and internal inhomogeneity of the medium, thereby causing polarization. The polarization mechanism of conductor and insulator materials under impact load is extremely complex, which is related to the propagation of stress wave and the microscopic polarization mechanism of the medium, and the charge transfer mechanism in t...

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Problems solved by technology

[0005] In order to overcome the above-mentioned problems or at least partly solve the above-mentioned problems, the embodiment of the present invention provides a device and method for testing the impulse polarization voltage of conductors and insulator materials, so as to solve the problems of complex stress wave loading methods, cumbersome operations, and problems existing in the existing one-dimensional loading system. Insufficient accuracy of stress and strain measurement and electromechanical response cannot be output at the same time

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