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It was learned from Nanjing University of Aeronautics and Astronautics that the first ultra-high precision light vector analyzer developed by the school was introduced.
Ultra-high-precision optical vector analyzers are like "eyes of the eye", which are needed in the field of optical devices for a wide range of applications, from home fiber-optic routers to spacecraft. It accurately measures the two most critical metrics of an optical device, amplitude response and phase response, to capture its performance in development and application. The first generation of instruments can only measure the amplitude response. The second generation instrument can measure the amplitude response and phase response at the same time. However, there is only one OVA5000 product of NASA listed company LUNA in the world, and its high precision version is not sold to China. .
In 2010, Professor Pan Shilong of Nanjing University of Aeronautics and Astronautics began to build a microwave photonics laboratory. He led the team to find out in the research that the foreign light vector analyzer adopts the method of “measuring by lightâ€, which is time-consuming and laborious and the precision is not high. The self-developed light vector analyzer adopts the method of “electrical metering†to light signals. Convert to microwave signal. The research team has mastered the optical frequency comb channel technology, balanced photoelectric detection technology and new electro-optic modulation technology, which basically overcome the related technical difficulties. The second prototype of the optical vector analyzer has been tested by more than ten units including the Institute of Semiconductors of the Chinese Academy of Sciences and Jiangsu Guangyang Optoelectronics. It also helped a naval unit to realize automated measurement of the fiber optic interferometer, improving measurement accuracy by 10 times and saving costs by half. the above.
China's first ultra-high precision light vector analyzer came out
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(Link mode :P tube type, FP flange, BP plate, BDP flip plate, DLP flip pipe type, DFP flip flange type, etc.)ZU-H pressure pipeline oil filter is installed on the pressure pipe of the hydraulic system to filter out the mechanical impurities mixed in the hydraulic oil and the glue, asphaltene, carbon slag produced by the chemical change of the hydraulic oil itself. Thus to prevent the valve core stuck, orifice gap and damping hole blockage and hydraulic components too fast wear and other failures. ZU-H filter has good filtering effect and high precision, but it is difficult to clean after plugging, and the filter element must be replaced. The ZU-H filter is equipped with a pressure difference signaling device. When the filter element is polluted and blocked until the pressure difference of the inlet and outlet is 0.35MPa, the switch signal is issued, and the filter element is replaced at this time to achieve the purpose of protecting the system safety.
The filter element of ZU-H filter is made of glass fiber filter material, which has the advantages of high filtration accuracy, large oil flow capacity, small original pressure loss, large pollution absorption, etc. Its filtration accuracy is calibrated by filtration accuracy, filtration ratio B3, β5, B10, β20>200, filtration efficiency n≥99.5%. The evaluation methods were IS016889-99 and GB/T18853-2002. Service life: the life of the ZU-H pipeline filter itself is not fixed, its use is very related to the cleaning of the filter, and the quality also has a lot to do with it. If you use too many environmental impurities, then the filter is more likely to inhale unclean gas, which increases the working pressure of the filter, and too much impurities will soon clog the filter element. However, do not insist on using when you find that the filter element is blocked and damaged, because fine particles of impurities will enter the lubricating oil of the system and accelerate the oxidation of the lubricating oil.