In order to improve work performance of M aglev vibration test systems,the relationships of operating parameters between different components and system were researched. The working principle of photoelectric displace...In order to improve work performance of M aglev vibration test systems,the relationships of operating parameters between different components and system were researched. The working principle of photoelectric displacement sensor was analyzed. The relationship between displacement of transducer and the infrared light area received by sensor was given. The method of expanding the dynamic range of vibrator was proposed,which makes dynamic range of Maglev vibrator doubled. By increasing the amplification of the amplifier,the sensitive photoelectric displacement sensor can be maintained. Two modes of operation of the controller were analyzed. Bilateral work of vibration test system designed can further improve the stability of the system.An object vibration was measured by Maglev vibration test system designed when different vibration exciter frequencies were loaded. Experiments showthat the output frequency measured by Maglev vibration test system and loaded are the same. Finally,the errors of test system were analyzed. These errors of vibration test system designed can meet the requirements of application. The results laid the foundation for the practical application of magnetic levitation vibration test system.展开更多
提出一种用于紫外临边成像光谱仪模数分离成像电路的系统设计方案,该方案避免了CCD模拟输出信号的板间传输和数字信号对模拟信号的干扰,使CCD信号处理电路的噪声水平达到了模拟前端数据手册中给出的2 LSB的性能指标。考虑CCD57-10 BI A...提出一种用于紫外临边成像光谱仪模数分离成像电路的系统设计方案,该方案避免了CCD模拟输出信号的板间传输和数字信号对模拟信号的干扰,使CCD信号处理电路的噪声水平达到了模拟前端数据手册中给出的2 LSB的性能指标。考虑CCD57-10 BI AIMO没有抗溢出结构,在饱和之前会发生电荷溢出现象,提出了临界溢出电子数的概念以取代饱和电子数,并通过增加转移时钟电压以加深势阱深度的方法,将临界溢出电子数从3.0×104提高到了6.0×104,保证了探测器可正确探测设计范围内的强光信号。为了实现更短的曝光时间以增加动态范围,在时序设计中引入了多次电荷倾倒的思想,在不降低探测器动态范围的前提下,将最短曝光时间由163 ms降低到了19 ms,实现了105系统动态范围的设计指标。展开更多
基金supported by the Chinese National Natural Science Foundation under Grant (No. 51377037)
文摘In order to improve work performance of M aglev vibration test systems,the relationships of operating parameters between different components and system were researched. The working principle of photoelectric displacement sensor was analyzed. The relationship between displacement of transducer and the infrared light area received by sensor was given. The method of expanding the dynamic range of vibrator was proposed,which makes dynamic range of Maglev vibrator doubled. By increasing the amplification of the amplifier,the sensitive photoelectric displacement sensor can be maintained. Two modes of operation of the controller were analyzed. Bilateral work of vibration test system designed can further improve the stability of the system.An object vibration was measured by Maglev vibration test system designed when different vibration exciter frequencies were loaded. Experiments showthat the output frequency measured by Maglev vibration test system and loaded are the same. Finally,the errors of test system were analyzed. These errors of vibration test system designed can meet the requirements of application. The results laid the foundation for the practical application of magnetic levitation vibration test system.
