Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1988-05-02
1989-08-15
Noland, Tom
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
73705, 36457104, 36457107, G01L 2700
Patent
active
048563170
ABSTRACT:
A system and method for initializing and calibrating a fiber optic pressure transducer so that a measured intensity of light which varies as a function of pressure can be accurately translated to the value of pressure which produces that value of light intensity. The transducer includes an enclosed sensor tip having a diaphragm which is exposed to atmospheric pressure on the inside and the pressure to be determined on the outside as measurements are taken, the resulting pressure differential producing a related attenuation in light intensity. Calibration according to the present invention is performed by exposing the diaphragm to atmospheric pressure on the outside and sub-atmospheric pressure on the inside while transmitting light through the fiber in the usual manner. The sub-atmospheric pressure is changed gradually as simultaneous measurements are made of the intensity of light returned through the fiber and the actual value of the sub-atmospheric pressure at a number of discrete times. The paired values are stored in a look-up table which is subsequently used to determine unknown pressures from matched values of measured light intensity.
REFERENCES:
patent: 3686958 (1972-08-01), Porter et al.
patent: 4213462 (1980-07-01), Sato
patent: 4428239 (1984-01-01), Johnston
patent: 4446715 (1984-05-01), Bailey
patent: 4599901 (1986-07-01), Hirschfeld
patent: 4678909 (1987-07-01), Jackson et al.
patent: 4711246 (1987-12-01), Alderson
patent: 4752141 (1988-06-01), Sun et al.
patent: 4760250 (1988-07-01), Loeppert
Hodge Robert F.
Hoffman Alan R.
Pidorenko John
Wang Wei-Min
Fiberoptic Sensor Technologies, Inc.
McGuire Charles S.
Noland Tom
LandOfFree
Vacuum calibration system and method for fiberoptic pressure tra does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vacuum calibration system and method for fiberoptic pressure tra, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vacuum calibration system and method for fiberoptic pressure tra will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-113538