FBG optical strain gage, os31000 pages

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Optical Strain Gage I os3100 §0o8°o0°oo§o§

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Applications

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• Continuous lifetime health monitoring

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of bridges, dams, buildings, tunnels,

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ships, aircraft, trains, and other complex

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structures.

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• Core building block for fiber optic trans-

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ducers for strain, temperature, displace-

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ment, pressure, and acceleration.

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Measurement of strain on a structure's

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surface.

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• Experimental mechanics evaluations

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requiring many sensors.

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Features

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Rugged, permanent weldable package

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(os3110).

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Rugged package fastens with same epoxy

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as conventional foil strain gage (os3120).

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Qualified to same rigorous standards used

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for comparable electronic gages.

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Cable integrated with sensor package for

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fiber protection and strain relief.

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Fast, simple, repeatable installation.

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Double ended design supports multiplex-

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ing of many sensors on one fiber.

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Gage installation and protection achieved

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with same methods as conventional

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electronic gages.

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Micron Optics'patented micro opto-

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mechanical technology.

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Description

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The os3100 Optical Strain Gage is designed to make fiber handling easy and sensor installation

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fast and repeatable. It is based on fiber Bragg grating (FBG) technology. The os3100's stainless

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steel carrier holds the FBG in tension and protects the fiber during installation. Since there are

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no epoxies holding the fiber to the carrier, long term stability is ensured by design.

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Two packaging options provide for either weld or epoxy attachment to a structure's surface.

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Installation time is just a few minutes. Welded gages can be used immediately after attach-

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ment. Epoxy gages typically cure in less than 24 hours at room temperature, similar to elec-

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tronic foil strain gages.

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In side by side comparisons with foil strain gages, the os3100 is equally sensitive and accurate,

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while providing for greater strain range and 100 times more fatigue life. The os3100 strain

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gage is qualified for use in harsh environments and delivers the many advantages inherent to

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all FBG based sensors.

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This sensor can be used alone or in series as a part of an FBG sensor array. Installation and

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cabling for such arrays is much less expensive and cumbersome than comparable electronic

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gage networks. Multiple optical strain gages can be arranged in close proximity at 0,45 and

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90 degrees for strain rosette measurements.

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os3110, Spot Weld

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os3120, Epoxy Mount

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With each sensor. Micron Optics provides a Sensor Information Sheet listing the gage factor

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and calibration coefficients needed to convert wavelength information into engineering units.

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Micron Optics' ENLIGHT Sensing Software provides a utility to calculate and then record, dis-

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play, and transmit data for large networks of sensors. Installation, qualification and other sen-

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sor information is available at: http://www.micronoptics.com/support_downloads/Sensors/.

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TUNED Products displaying the "Micron Optics Tuned" logo include Micron Optics tunable technologies ensuring high quality and performance.

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