Device and method for improving reliability of high-power pulse xenon lamp light source

Abstract

The invention discloses a device and method for improving the reliability of a high-power pulse xenon lamp light source. The device is characterized in that a dual-solid-state discharge switch performing preionization and main discharge through a high-voltage thyristor switch assembly is adopted so as to avoid the self-excitation of a switch, improve the reliability of a high-power pulse xenon lamp light source, and prolong the service life of the high-power pulse xenon lamp light source; and a working mode sequentially comprising preionization and main discharge is adopted, wherein preionization current is detected and judged, under the condition that preionization is judged to be normal, FPGA conducts main discharge triggering, then main discharge current is detected and judged, under the condition that main discharge actual output current is judged to be normal, the FPGA outputs a detonating signal to serve as synchronous triggering of detonating equipment, and under the condition that preionization or main discharge output current is abnormal, the FPGA does not output detonating signals, so that the functions of automatic detection, fault judgment, experiment interruption and the like of the working state of the pulse xenon lamp light source are achieved, the working stability and reliability of the pulse xenon lamp light source are improved, and important technical support is provided for smooth implementation of a large detonation experiment.

Description

technical field [0001] The invention relates to the technical field of pulsed xenon lamp light sources, in particular to a device and method for improving the reliability of high-power pulsed xenon lamp light sources. Background technique [0002] The pulsed xenon lamp light source is used as the background lighting method for high-speed photographic diagnostic research in detonation experiments, and has the advantages of high brightness, high efficiency and long life. In large detonation experiments, the working stability and reliability of the pulsed xenon light source are very important. In some large-scale detonation experiments, according to the physical requirements and experimental layout, it is necessary to use a high-power pulsed xenon lamp light source with an operating voltage of tens of kilovolts and a discharge current of tens of kiloamperes to provide light intensity poles for high-speed photographic diagnosis of the front lighting type. High background lighti...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing pulsed xenon lamp light source adopts an arc type discharge switch, which is prone to self-excitation phenomenon, and lacks timely feedback and judgment on the actual working state, which is not conducive to the stable and reliable operation of the pulsed xenon lamp light source. Therefore, the present invention The invention provides a device and method for improving the reliability of a high-power pulsed xenon lamp light source. It adopts a dual solid-state discharge switch in which both the pre-ionization and the main discharge are high-voltage thyristor switch components to avoid self-excitation of the switch. In the working mode of main discharge, the pre-ionization current is firstly detected and judged, and when the pre-ionization is judged to be normal (that is, the pre-ionization power threshold comparison circuit outputs a fiber signal with a light state), the FPGA triggers the main discharge, and then the main discharge current is checked. Detection and judgment, judging that the actual output current of the main discharge is normal (that is, the main discharge power threshold comparison circuit outputs an optical fiber signal with light), and the FPGA outputs the detonation signal as a synchronous trigger for the detonation device

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