Design And Realization Of High Power Xenon Flashlamp Detection System

With the deepening of the research of large laser device in China, the higher requirements for working performance and energy output performance of xenon flashlamps are put forward. The engineering design, implementation and reliable operation of high-power laser devices have been related to the technical indicators and lifespan of the xenon flashlamps, so the quality of the xenon flashlamps will directly affect the reliability of high-power laser operation.A practical, advanced, user-friendly high-power xenon flashlamp test system is designed to detect the early failure and the lifespan of the main laser amplifier high power xenon flashlamp, improving its quality and life by optimizing the manufacturing process. The test system based on S7-300 PLC as the control core, it can complete charging and discharging process of the system automatically and judge the abnormal discharging current waveform via Ethernet remote centralized control and management.This paper starts from the hardware of the high power xenon flashlamp test system, and analyzes the composition of the test system firstly and focuses on selecting the parameters of main circuit and the pre-ionization circuit, then discusses the working principle of the series resonant charging power supply and the design of charging control protection circuit. The software design of the xenon flashlamp test system is analyzed, and a set of remote computer control software and a set of on-site PLC control program are designed in view of the functional requirements of the power control system, which makes the test system run automatically according to the settled sending time and fixed intervals, and realizes the function of protecting for failures in running process. The control software verifies the operation accuracy and algorithm reliability via testing.This paper also presents the importance of EMC design, as well as the improvements of the xenon flashlamp test power system used in electromagnetic compatibility. According to the technical requirements, the control system needs to be done on automatic control, the load fault can be judged automatically, operational data will be automatically recorded, and need to operate automatically under the conditions of continuous operation, which requires the system could run in continuously high reliability. In order to meet the requirements above, the research of xenon flashlamp test system adopts a mature technology to isolate the power supply for the PLC, while taking the photoelectricity isolation technology for the input and output signals to protect the power supply control system without any fault under a complex electromagnetic environment. The system uses a secondary coupling technology in data acquisition to weak the interferences from the current circuit detected greatly, and applies an off-line power supply method in data acquisition function unit to ensure at data collecting and avoid interferences from the grid, then improve the reliability of the data acquisition unit.