A Design Method for Electromagnetic Compatibility of Low-light Image Intensifier

Abstract

The invention discloses an electromagnetic compatibility design method for a low-light image intensifier, which solves the problem of the volume of the existing low-light image intensifier by performing electromagnetic compatibility design on the high-voltage power supply, the image intensifier tube, and the overall shell that make up the low-light image intensifier. The contradiction between the weight limit and electromagnetic compatibility improves the anti-interference ability of the low-light image intensifier in the environment of strong electromagnetic interference, and improves its working stability.

Description

technical field [0001] The invention relates to the technical field of image intensifiers, in particular to an electromagnetic compatibility design method for low-light image intensifiers. Background technique [0002] The low-light image intensifier is the core device of the low-light night vision device. The main factor affecting its working stability in the traditional battlefield is the intensity of incident light, which requires it to be able to adapt to 10 -4 lx~10 4 lx has an even wider lighting range, and can image clearly in strong flash environments such as gunfire. With the development of automatic gating high-voltage power supply technology, the dynamic range and service life of the image intensifier have been greatly improved, and the problem of imaging under strong light has been solved. [0003] The use of various reconnaissance, detection, and communication equipment in modern high-tech warfare leads to a very complex electromagnetic environment on the batt...

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Problems solved by technology

[0006] The image intensifier adopts a thin-walled, light-weight, insulated and high-voltage-resistant plastic shell, which has no electromagnetic shielding effect, and the shell cannot be connected to the input ground or the earth. It is easy to interfere with external radiation and cause the RE102 test to exceed the standard; it is also easily affected by external radiation, resulting in the RS103 test. exception occurs when

[0007] The high-voltage power supply of the image intensifier contains multiple DC-DC switching power supplies, which will inevitably generate electromagnetic interference with rich frequencies. Due to the small size of the shell, it is impossible to use large-scale filter components such as capacitors and inductors, resulting in the presence of switches on the input line. Frequency fundamental wave interference and high-order harmonic conduction interference and radiation cause CE102 and RE102 tests to exceed the standard

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