发明名称 |
System to determine environmental pressure and birefringent-biased cladded optical sensor for use therein |
摘要 |
A cladded birefringent pressure sensor for use in a pressure-sensing system. The sensor is a single composite plate consisting of two plates each with different indices of refraction. One surface of the sensor is exposed to the environmental pressure under measurement. A collimated broad band light source is transmitted via a fiber optic cable, a polarizer and a birefringent bias element which transmits a wavelength/polarization component of light through the sensor. An external force applied to the sensor adds a stress-induced component to the polarized lightwave. The lightwave exits the sensor and is captured by a second polarizer producing a modulated light spectrum. A focusing element collects the light and transmits it down another fiber optic cable. The cable transmits the light to an opto-electronic interface where the fringe pattern is extracted and a computer compatible signal is generated for a CPU. The CPU performs a Fourier transform on the fringe pattern, where the phase term for a selected frequency is the measure of the externally applied pressure on the sensor.
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申请公布号 |
US5589931(A) |
申请公布日期 |
1996.12.31 |
申请号 |
US19950406331 |
申请日期 |
1995.03.17 |
申请人 |
ALLIEDSIGNAL INC. |
发明人 |
RAPOPORT, WILLIAM R.;HOU, JANPU |
分类号 |
G01L1/24;G01L11/02;(IPC1-7):G01B11/16 |
主分类号 |
G01L1/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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