Testing Transverse Sensitivity of Linear Single-Axis Pendulous Accelerometer with Double Turntable Centrifuge

Current ISO standard methods for testing transverse sensitivity of accelerometers are vibration-based. They have difficulties in producing low-frequency vibration for various reasons. This paper introduces a double turntable centrifuge (DTC) to test the accelerometer transverse sensitivity at low frequencies (from 0.01 to 10 Hz). The proposed method can avoid limitations of traditional vibration-based schemes for transverse sensitivity test. In this paper, a theoretical analysis of the method is followed by a presentation of the experimental set-up, and the measurement procedure of a linear single-axis pendulous accelerometer. According to the theoretical analysis and experimental results, it is practicable to test the low-frequency transverse sensitivity with a DTC. The method proposed here can test accelerometer transverse sensitivity at low-frequency with large amplitudes (up to 700 m/s²), and directly measure the angle of the transverse sensitivity with high resolution. It can be a supplement to the standard methods for testing accelerometer transverse sensitivity at low-frequency.     

老字号品牌创新视角下的多形态标志设计研究

目的依托多形态标志系列化、个性化、多维化的设计新理念,解决老字号品牌体系混乱、标志外形同质化、传播媒介单调的问题,助力老字号品牌的持续发展。方法实地调查发现老字号品牌形象设计与推广策略存在的问题,通过理论构建和归纳总结提出老字号品牌中多形态标志的创新应用方案。结论多形态标志为老字号品牌重塑提供了新思路,运用元素重组、系列图形、随机生成等标志设计手段,能解决老字号品牌形象的创新问题。     

频谱分析仪现行检定规程与校准规范的对比研究

本文对比介绍了JJF1396-2013《频谱分析仪校准规范》与GJB/J 5859-2006《宽频带频谱分析仪检定规程》的检定校准项目、方法及相关要求,为频谱分析仪的检定校准工作开展提供参考借鉴。     

关于镁合金中长周期有序结构的研究综述

系统地介绍了6H、10H、14H、18R、24R型LPSO结构的原子堆垛和RE、Zn的占位特点,探讨了LPSO结构的形成条件和形成机制,分析了含LPSO结构相合金的组织演变过程并概述了组织演变方面最新的研究成果,总结了含LPSO结构相镁合金的室温和高温性能的研究现状,最后对该类合金未来的研究方向进行了展望。