发明名称 |
TDM array of optical non-acoustic pressure sensors |
摘要 |
A pressure measuring device which utilizes an array of optical, non-acoustic pressure sensors with a laser light source which generates a pulsed light signal into a light transmitting cable, wherein the pulsed light signal propagates along the light transmitting cable through the array of optical pressure sensors. A plurality of optical couplers are attached to the light transmitting cable at multiple locations spaced apart from one another in order to branch off at least a portion of the pulsed light each location. Each of the plurality of optical couplers includes a respective optical pressure sensor and a pressure insensitive reflector, wherein the branched off portion of the pulsed light signal is transmitted into to both the optical pressure sensor and the reflector. Each optical pressure sensor reflects a pressure indicating signal back into the optical coupler, while the pressure insensitive reflector reflects a reference signal back into the optical coupler. The pressure indicating signal and the reference signal are reflected through the optical coupler into the light transmitting cable as a pair of non-overlapping pulsed signals, which are then retrieved from the light transmitting cable by a signal detector. The retrieved pressure indicating signal is compared with the retrieved reference signal to determine the pressure acting upon the optical pressure sensor.
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申请公布号 |
US6038926(A) |
申请公布日期 |
2000.03.21 |
申请号 |
US19970923707 |
申请日期 |
1997.09.04 |
申请人 |
FREDERICK, DONALD A.;HALL, DAVID B. |
发明人 |
FREDERICK, DONALD A.;HALL, DAVID B. |
分类号 |
G01L11/02;(IPC1-7):G01L9/00;G01J1/56;G01J5/46 |
主分类号 |
G01L11/02 |
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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