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电子测压器是新型火炮膛压测试仪器,本文介绍了该仪器动态校准系统的原理、影响其精度的因素,并讨论了处理数据的方法. 相似文献
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简述了火炮膛压塑性测压静态校准和动态校准的工作原理,介绍了动态校准是国际膛压检测技术的发展方向,并分析了国内塑性测压的现状,提出了我国塑性测压的计量发展思路。 相似文献
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S. G. R. Salim E. R. Woolliams N. P. Fox 《International Journal of Thermophysics》2014,35(3-4):504-515
This paper describes a method to calibrate photodiode array spectrometers in the spectral radiance mode using a fixed-point blackbody as a reference source. Fixed-point blackbodies are characterized by their excellent emissivity, uniformity, and stability, which make them superior to both conventional standard lamps and variable temperature blackbodies. The temperature of these fixed points is accurately determined being traceable to either the International Temperature Scale (ITS-90) or thermodynamically through radiometric standards. The potential advantage of the fixed-point traceability chain is that it can be universally reproduced without recourse to any hierarchical calibrations or standards. The paper presents the calibration system and discusses the limitations of such an approach. The method used obtained an uncertainty of around 1.4 % ( \(k = 2\) ) associated with radiance responsivity across the spectral region from 550 nm to 1050 nm, which is comparable to what is readily achieved with a lamp-tile or lamp-illuminated spherical source. 相似文献
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本文主要对JJF1318-2011《影像测量仪校准规范》进行解析,并探讨在操作实践中如何合理运用相关条款,并归纳了不同配置的影像测量仪的校准方案和技巧。 相似文献
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文章针对专用测试设备校准工作中遇到的问题,基于专用测试设备的特点,分别介绍了专用测试设备校准点的选取、校准参数的分类及校准方法,同时阐述了校准规范的编写和管理要求. 相似文献
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We consider three rigid balls moving on a plane and investigate their multiple collisions (i.e., the three balls collide at the same time). This is a 3D problem because balls may jump. We develop a predictive theory based on the idea that the system made of three balls and a plane is deformable. As shown by the examples, the theory accounts for the physical properties of multiple collisions and its main feature is the presence of non local interactions. 相似文献
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制冷系统动态仿真中要求压缩机模型能够适用于吸入制冷剂状态从两相到气相的宽变化范围,并且能够快速地反映其关键的动态特性,为了解决这个问题,提出了可覆盖进口状态从气相到两相制冷剂的准动态压缩机模型。此模型按其热力过程分解为吸入气相或两相制冷剂与腔内制冷剂混合过程的动态模型、壳体换热过程的动态模型和气缸内制冷剂压缩过程的稳态模型。此压缩机模型克服了通常压缩机模型中忽略腔内制冷剂混合过程所导致预测的流量大于实际流量的缺点,以及全部采用动态模型导致计算复杂的问题。通过某压缩机厂生产的全封闭式压缩机的稳态实验数据和模型预测值的比较,结果表明:模型预测的稳定工况时的质量流量和输入功率与实验数据误差小于5%;开机过程质量流量和输入功率与实验测量值趋势一致,误差小于10%。 相似文献
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