A Fiber-Optic Microsensor and Probe to Measure the Index of Refraction in the Ocean

用于测量海洋折射率的光纤微型传感器和探头

• 批准号: 8600918
• 负责人: George Seaver
• 金额: $ 22.74万
• 依托单位: Seaver (SeaLite) Engineering
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-07-01 至 1989-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8600918&HistoricalAwards=false
• 关键词: Fiber; Optic; Microsensor; Probe; Measure

Phase II of this SBIR research, will continue the development of two types of refraction micro-sensors, resulting in at least one calibrated prototype microsensor probe. It will also improve the accuracy and dynamic range of the spectrograph detector, largely from off-the-shelf components. An optical fiber transmission link will be developed to allow remote use of the microsensor; this development will include optimizing the reeling and unreeling techniques and minimizing the transmission link induced signal distortion. Finally, the work on the index of refraction to specific volume algorithm will continue with higher order terms in temperature and pressure included. The goal is an equation of state for the specific volume good to 1x10-5 cm 3/g at the 95% confidence level. The refraction microsensor and transmission link improvements from this research would have its most immediate commercial application in the chemical process control industry and HPLC (High Performance Liquid Chromatography). It would also have a long awaited application in oceanography, but with a longer development effort. The precise measure of seawater density in the oceans is critical to many investigations. Traditional methods for deriving density rely on independent measurements of seawater temperature, pressure, and conductivity. Differences in electronic sensor response rates and other drawbacks have become a limiting factor in making these determinations. However, the optical properties such as the index of refraction of light in seawater (and other liquids) change as a function of density. Recent advances in optical technology make it now possible to measure these changes and transmit data more effective than is presently possible using electric or electromechanical sensors.

SBIR 研究的第二阶段将继续开发两种类型的折射微传感器，从而产生至少一个经过校准的原型微传感器探头。 它还将提高光谱仪探测器的精度和动态范围，这主要来自于现成的组件。 将开发光纤传输链路以允许远程使用微传感器；这一发展将包括优化卷绕和放卷技术以及最大限度地减少传输链路引起的信号失真。 最后，比容折射率算法的工作将继续进行，其中包括温度和压力的高阶项。 目标是在 95% 置信水平下比容达到 1x10-5 cm 3/g 的状态方程。 这项研究的折射微传感器和传输链路的改进将在化学过程控制行业和 HPLC（高效液相色谱）中得到最直接的商业应用。 它还将在海洋学领域得到期待已久的应用，但开发工作需要更长的时间。 海洋中海水密度的精确测量对于许多研究至关重要。 推导密度的传统方法依赖于海水温度、压力和电导率的独立测量。 电子传感器响应率的差异和其他缺点已成为做出这些决定的限制因素。 然而，海水（和其他液体）中光的折射率等光学特性会随着密度的变化而变化。 光学技术的最新进展使得现在可以测量这些变化并比目前使用电气或机电传感器更有效地传输数据。