操控台结构优化设计及运输包装方法研究

目的 解决操控台在按照振动试验考核过程中出现的内部结构散架、表面磨损等问题,通过振动试验考核,满足恶劣颠簸路段运输要求。方法 对操控台进行力学仿真,对操控台结构最大等效应力处进行优化设计,提出一种加固木箱填充聚氨酯发泡材料的包装方法,采用有限元仿真计算和剩余强度系数公式评估强度安全,并通过随机振动试验进行验证。结果 优化结构及改进包装后的操控台剩余强度系数大于1,随机振动试验后台体及包装箱未出现损坏现象。结论 操控台结构优化方式和新型包装方法具有合理性,满足振动试验考核和恶劣颠簸路段运输要求。     

WDM光传输系统2.5Gbit／s光发送模块研究

本文介绍了作者设计，调试的２．５Ｇｂｉｔ／ｓ光发送模块的工作原理、关键技术、典型性能参数，该模块通过控制激光器温度来稳定其中心波长，为波分复用系统的应用提供了具备稳定中心波长特性的光源。     

集成运放的互阻抗放大技术应用

本文对集成运放在电子技术应用中互阻抗放大技术进行了分析讨论，给出了相应的典型应用实例，具有重要的推广应用价值。     

1-Wire单总线器件技术规范及应用研究

1-Wire单总线是一种特殊串行数据通信方式,它具有结构简单、成本低廉、节省I/O资源、便于总线扩展和维护等优点。文章介绍了1-Wire单总线器件的若干技术规范及其应用设计,给出了单总线传感器件的典型应用电路实例,并分析了1-Wire单总线器件实际应用中存在的问题。     

专用型运算放大器在精密仪器仪表中的应用

对精密运放、高速运放、低噪声运放、视频运放等专用型运算放大器及其在仪器仪表中的应用技术进行了分析讨论,给出了几种典型应用实例,具有较高的实用价值。     

瓦斯涌出规律及综合防治措施

介绍高瓦斯矿井针对瓦斯涌出规律及来源，采取各种防治措施，从而保证工作面的安全生产。     

A novel three-ring-core few-mode fiber with large effective area and low nonlinear coefficient

A novel three-ring-core few-mode fiber with large effective area and low nonlinear coefficient is proposed in this paper. The fiber characteristics based on the full-vector finite element method (FEM) with perfect matched layer boundary conditions show that four supermodes with large effective area, low nonlinear coefficient and low differential mode group delay (DMGD) are achieved. With the increase of input wavelength, the effective areas of three-ring-core few-mode fiber are increased, and the nonlinear coefficients are decreased. The bending losses are increased with the increase of input wavelength, and are decreased with the increase of bending radius. Moreover, the proposed fiber performs a nonlinear coefficient and DMGD flattened profile at a large wavelength range.     

A dispersion flattened fiber front-haul transmission system with high bitrate signal at low input optical power

We propose a dispersion flattened fiber (DFF) front-haul transmission system with high bitrate, polarization multiplexing (PM) and quadrature amplitude modulation (QAM) signal at low input optical power. The modulation format of the system is PM-16QAM, and the bitrate is 256 Gbit/s. The transmission characteristics over DFF link system are experimentally studied, which are compared with those over non-zero dispersion shifted fiber (NZDSF) link and standard single mode fiber (SSMF) link. The experimental results show that the error vector magnitude (EVM) of 256 Gbit/s and PM-16QAM signal over 25 km DFF link is 0.75% better than that over 25 km NZDSF link at least, and the bit error rate (BER) and Q-factor are much better than those of NZDSF. Their EVM and BER are both decreased with the increase of input optical power, and the Q-factor is increased. Those characteristics over 25 km SSMF are the worst at the same case. The larger the dispersion is, the more the constellation points are deviated from their respective centers and the worse the constellation characteristics are. The greater the attenuation of the DFF is, the smaller the input power of the DFF is, the more the constellation points are deviated from their centers and the worse the constellation characteristics are. This study provides a new idea and experimental support for long span front-haul propagation in mobile communication.     

光脉冲特性测量和分析的新方法

文章给出并采用了光脉冲特性分析新方法,对10 GHz光脉冲在色散平坦光纤中的线性传输前后的时域波形、相位和时间带宽积等作了深入研究,并与数值计算得到的双曲正割和高斯光脉冲线性传输特性作了比较,对光脉冲的时域波形、啁啾等作出了更准确的判断,进一步证实了光脉冲的二次谐波-频率分辨光学门测量及其分析新方法的可靠性和准确性.     

某高精密光电转台结构设计与模态分析

以某高精密搜跟一体光电设备为目标对象,根据该产品的技术指标要求,设计了一种高精密光电转台,对高精密光电转台样机进行装配与检测,确保轴系晃动误差值满足技术指标要求运用 ANSYS 软件对光电转台的三维模型进行模态分析,得出高精密光电转台的固有频率高于工作频率,不会产生共振现象。该高精密光电转台的实际使用效果表明该结构设计是成功的,对同类型转台类产品结构设计具有参考借鉴意义。