基于OMAPl510单兵通信系统中头盔子系统的实现

OMAPl510是德州仪器TI公司的双核架构处理器,整合了一个控制性能强的ARM925处理器、一个低功率消耗的高效能TMS320C55X数位信号处理器DSP。文中首先描述单兵通信系统的组成,并给出以头盔子系统为核心的基本工作原理图。然后介绍了0MAPl510的硬件架构和软件架构,并较为详尽地给出实现头盔子系统的蓝牙主控程序的主要代码。最后针对此头盔子系统蓝牙无线通信距离的局限性,提出与头盔共形的微带阵列天线的改进方案。     

The Blind Basinet: A New Interpretation of Royal Armouries IV.2

For many years a curiosity in the collection of the Royal Armouries, IV.2, or the ‘Blind Basinet’, is a fascinating example of an early 16th century great basinet not so much for what is present but for what is not. The lack of any means of seeing out of the helmet has led to a number of traditions regarding its provenance and purpose. A detailed examination of the helmet’s interior, as well as comparison with some other contemporary pieces, shows that it is an unfinished piece of armour. It was left at the stage where the sights and breaths would have been pierced, but they were left unfinished until some later modifications created a display piece, one which can still be seen at the Royal Armouries in Leeds.     

复杂测量系统的计量检定研究

目前条件下 ,对由多个子系统构成的复杂测量系统的最终测量结果的计量检定存在诸多困难。通过对子系统的计量检定实现复杂系统的计量检定的研究 ,提出了复杂系统计量检定的理论依据和现实可行性 ,解决了多种仪器的计量检定问题。给出了 4线微电阻测量仪的检定实例。     

光电头盔系统信号处理分析与探讨

阐述了当前广泛采用的光电式头盔测位系统的组成和原理,给出了解算瞄准线参数的数学关系式。对信号处理和精度进行了分析,导出了误差表达式,可用于系统设计中误差的估算和验证。通过信号处理分析,论述了影响精度的主要因素,最后,提出了从根本上提高精度的方法——峰值点检测处理技术。     

The Production and Deposition of the Guisborough Helmet

In September 1878 the British Museum received a donation of a folded metal plate which had been embossed and gilded. Restoration of the object revealed that the folded plate was in fact the outer casing of a Roman copper alloy cavalry sports type helmet which dates to the late second or third century AD. The story of what became known as the Guisborough helmet began 14 years earlier in what was then the North Riding of Yorkshire when workers employed by the Cleveland Railway Company discovered a ‘very curious plate of metal’ during road construction. It appears that the helmet was deliberately prepared for deposition and buried at a depth of c30 cm close to a stream. Examination by the authors suggests that this was a high value item that had been repaired many times. Experimental evidence suggests that the decoration alone required approximately 16 h to fashion.     

Conserving a Late Eighteenth–Early Nineteenth Century Indian Helmet: A Technical Study

This paper describes the treatment of a distinctive late eighteenth/early nineteenth-century helmet from Gwalior in India known as a kolah khud or top. The fine mail aventail of the helmet, comprised of butted rings of iron or steel and brass, had fallen into a severe state of disrepair and was at risk of further deterioration without interventive conservation. The processes of replicating new mail rings and integrating these into the original structure as well as cleaning the helmet are discussed together with an analysis of the ethical implications of such actions.     

Inequality‐based reliability estimates for complex systems

Full‐system testing for large‐scale systems is often infeasible or very costly. Thus, when estimating system reliability, it is desirable to use a method that uses subsystem tests, which are often less expensive and more feasible. This article presents a method for bounding full‐system reliabilities based on subsystem tests and, if available, full‐system tests. The method does not require that subsystems be independent. It accounts for dependencies through the use of certain probability inequalities. The inequalities provide the basis for valid reliability calculations while not requiring independent subsystems or full‐system tests. The inequalities allow for test information on pairwise subsystem failure modes to be incorporated, thereby improving the bound on system reliability. We illustrate some of the properties of the estimates via an example application. © 2013 Wiley Periodicals, Inc. Naval Research Logistics, 2013     

头盔光电目标指示器

头盔光电目标指示器解决对空中目标的搜索及自动快速指示,达到抑制电子干扰,缩短火控系统反应时间,提高发现敌机低空超低空入侵的概率.头盔光电目标指示器利用两个加速度计探测人头的俯仰信息,磁强计测量人头转动的信息,通过解算后得到人头运动的方位角和俯仰角并提供给火控系统.介绍了该指示器的组成和样机的技术指标.试验结果表明:研制的样机精度高、工作可靠、使用方便.     

一种新颖的头盔显示器光学系统

介绍一种新型的５０°×６０°宽视场头灰显示器的光学系统,该系统属工程设计,它可以克服大视场头盔显示器中存在的眼点距离小、边缘现场有渐晕、组合玻璃大、显示效率和透过率低等问题,其设计思想新颖,构思巧妙。     

A Portrait of a Helmet: A Funerary Helmet from the Northern Netherlands

This paper describes a seventeeth-century helmet, which was found in a church in the Frisian village of Schettens. Not only the type, but also the context in which this helmet was found, made the find exceptional. The presence of tombstones in the church made it possible to trace the object to a Frisian colonel from the Dutch States Army. What makes the helmet even more special, is the fact that it was prominently depicted on the tombstone of the deceased Frisian colonel. The find of the helmet and its ‘portrait’ on the tombstone are unique for the northern Netherlands. It gives cause for further study of the Dutch funeral tradition, in which elements of armour played an important role. In this regard, it is very interesting to draw a comparison with the same tradition in England.