SBIR Phase I: Flux-Gated Spin-Dependent-Tunneling Sensors

SBIR 第一阶段：磁通选通自旋相关隧道传感器

• 批准号: 0214959
• 负责人: Catherine Nordman
• 金额: $ 10万
• 依托单位: NVE CORPORATION
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-07-01 至 2002-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0214959&HistoricalAwards=false
• 关键词: SBIR; Phase; Flux; Gated; Spin

This Small Business Innovation Research (SBIR) Phase I project develops novel spin-dependent-tunneling (SDT) magnetic-field sensor devices based on innovative methods of flux modulation. The program identifies two modes of "flux gating" as a means of chopping or sweeping the magnetic field which is sensed by the SDT transducers. The flux gating methods are proposed as enhancements to the functionality of the already promising SDT magnetic sensor. The first method offers a low-power solution for increasing the SDT signal-to-noise ratio especially at low frequencies where 1/f noise is present. The second method enables the determination of absolute field magnitudes. Successful development of these novel ideas will lead to the advancement of small, solid-state, inexpensive, low-power, high resolution magnetic-field sensors. These sensors can be used discretely or in compact arrays for diverse applications including non-destructive evaluation of metallic structure flaws.The commercial applications of the research include non-destructive evaluation of flaws in metallic structures; detection, surveillance and tracking of magnetic or metallic objects; security systems; and magnetic media sensing-which includes currency evaluation and discrimination, and magnetic card readers.

这个小型企业创新研究（SBIR）第一阶段项目开发了基于磁通调制创新方法的新型自旋相关隧道（SDT）磁场传感器设备。该程序识别两种模式的“磁通门控”作为斩波或扫描的磁场，这是由SDT传感器感测的手段。磁通门方法被提出作为已经有前途的SDT磁传感器的功能的增强。第一种方法提供了一种低功耗解决方案，用于提高SDT信噪比，特别是在存在1/f噪声的低频下。第二种方法能够确定绝对场幅度。这些新想法的成功开发将导致小型，固态，廉价，低功耗，高分辨率磁场传感器的进步。这些传感器可以单独使用，也可以以紧凑的阵列形式用于各种应用，包括金属结构缺陷的非破坏性评估。该研究的商业应用包括金属结构缺陷的非破坏性评估;磁性或金属物体的检测、监视和跟踪;安全系统;磁介质传感，包括货币评估和识别，以及磁卡阅读器。