SPECTROMETER MONITOR AND PROTECTION SYSTEM

光谱仪监控和保护系统

• 批准号: 8363988
• 负责人: PETER P BORBAT
• 金额: $ 0.65万
• 依托单位: CORNELL UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8363988
• 关键词: Amplifiers; Computer software; Detection; Elements; Funding; Generations; Grant; Health; Length; Monitor; National Center for Research Resources; Noise; Output; Physiologic pulse; Principal Investigator; Qualifying; Research; Research Infrastructure; Resources; Source; System; Technology; United States National Institutes of Health; base; cost; ferrite; microwave electromagnetic radiation; programs; repaired; research study

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. Primary support for the subproject and the subproject's principal investigator may have been provided by other sources, including other NIH sources. The Total Cost listed for the subproject likely represents the estimated amount of Center infrastructure utilized by the subproject, not direct funding provided by the NCRR grant to the subproject or subproject staff. Our high-pulse TWTA's and mm-wave spectrometers cannot have fully passive receiver protection. A malfunction in pulse sequence generation or in receiver protecting element will be fatal for the expensive low-noise amplifier. We have considered software safeguards, which check input parameters for sanity and replay programmed pulse sequences before the experiment has started. We thus plan to develop spectrometer monitor hardware which will be based on FPGA to provide high duty-cycle safeguards by monitoring TWTA gate pulses. It will also discriminate or repair runt pulses, glitches, pulses in too rapid succession, pulses that are too long, qualify multi-pulse sequences, shut down RF pulses based on output pulse length, duty cycle and average power by means of pulse detection before and after waveguide attenuator. It will monitor status lines from an active receiver protector and from a microwave pulse-forming unit. An active receiver protector health monitoring circuit and BIT for proper ferrite state will also be implemented.

这个子项目是许多利用资源的研究子项目之一 由NIH/NCRR资助的中心拨款提供。子项目的主要支持 子项目的主要研究者可能是由其他来源提供的， 包括其它NIH来源。 列出的子项目总成本可能 代表子项目使用的中心基础设施的估计数量， 而不是由NCRR赠款提供给子项目或子项目工作人员的直接资金。 我们的高脉冲TWTA和毫米波光谱仪不能提供完全被动的接收机保护。 对于价格昂贵的低噪声放大器来说，脉冲序列发生器或接收机保护元件的故障将是致命的。我们已经考虑了软件安全措施，在实验开始前检查输入参数是否正常，并重放编程的脉冲序列。因此，我们计划开发基于FPGA的光谱仪监控器硬件，通过监控TWTA门脉冲来提供高占空比保障。它还将基于输出脉冲长度、占空比和平均功率通过波导衰减器之前和之后的脉冲检测来区分或修复矮小脉冲、假信号、过快连续的脉冲、过长的脉冲、合格的多脉冲序列、关闭RF脉冲。它将监测来自有源接收器保护器和微波脉冲形成单元的状态线。一种有源接收器保护器健康监测电路， 还将实施用于适当铁氧体状态的BIT。