Comments on: How do FBG sensors work? http://micronoptics.com/blog/?p=21 Providing Optical Sensing Solutions Worldwide Fri, 27 Apr 2012 16:09:48 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: Tom Graver http://micronoptics.com/blog/?p=21#comment-8062 Tom Graver Mon, 26 Sep 2011 20:30:54 +0000 http://micronoptics.com/blog/?p=21#comment-8062 PImfg, The basic technology is unchanged, but there are advances in sensor, instrument and software. New sensor packages are coming on line regularly. Our latest release is a 50mm travel displacement gage, the os5100. It's a rugged package that our civil structures customers have been seeking for a long time. They will integrate their new displacement measurements with strain, temperature, and acceleration all on the same fiber, all using FBGs. Instruments have expanding capabilities as well. For example, the new sm690 can sample FBGs at 2MHz. FBGs are already used in blast and ballistics measurement, now the higher sampling rates can help characterize these events with more precision. The ENLIGHT software has an expanding suite of data management tools. This is important as the numbers of FBGs and scan rates increase. ENLIGHT still makes it easy to move from optical properties to the real measurement properties of interest, e.g., strain and temperature. Tom PImfg,

The basic technology is unchanged, but there are advances in sensor, instrument and software.

New sensor packages are coming on line regularly. Our latest release is a 50mm travel displacement gage, the os5100. It’s a rugged package that our civil structures customers have been seeking for a long time. They will integrate their new displacement measurements with strain, temperature, and acceleration all on the same fiber, all using FBGs.

Instruments have expanding capabilities as well. For example, the new sm690 can sample FBGs at 2MHz. FBGs are already used in blast and ballistics measurement, now the higher sampling rates can help characterize these events with more precision.

The ENLIGHT software has an expanding suite of data management tools. This is important as the numbers of FBGs and scan rates increase. ENLIGHT still makes it easy to move from optical properties to the real measurement properties of interest, e.g., strain and temperature.

Tom

]]> By: PImfg http://micronoptics.com/blog/?p=21#comment-7997 PImfg Wed, 14 Sep 2011 00:46:04 +0000 http://micronoptics.com/blog/?p=21#comment-7997 Great Post! Thanks Tom for the information that you have been posted, It is very detailed. By the way I just want to ask since that it is posted back in 2008, do we have an updated version of this one? Great Post! Thanks Tom for the information that you have been posted, It is very detailed. By the way I just want to ask since that it is posted back in 2008, do we have an updated version of this one?

]]> By: Tom Graver http://micronoptics.com/blog/?p=21#comment-6638 Tom Graver Fri, 17 Dec 2010 15:50:56 +0000 http://micronoptics.com/blog/?p=21#comment-6638 Hello Will, Assuming the material properties are the same, the strain be inversely proportional to cross sectional area of the fiber. So the stress on an 80um fiber will be higher by a factor of 62.5^2 / 40^2 or 2.441. Since Young's Modulus is the same as a 125um fiber the strain (strain = stress/YM) will also increase by a factor of 2.441. In summary the Corning calculator could be used to convert tension to stress and strain for a 125um fiber, then multiply the resulting stress and strain by 2.441 for a 80um fiber. Tom Hello Will,

Assuming the material properties are the same, the strain be inversely proportional to cross sectional area of the fiber.

So the stress on an 80um fiber will be higher by a factor of 62.5^2 / 40^2 or 2.441. Since Young’s Modulus is the same as a 125um fiber the strain (strain = stress/YM) will also increase by a factor of 2.441.

In summary the Corning calculator could be used to convert tension to stress and strain for a 125um fiber, then multiply the resulting stress and strain by 2.441 for a 80um fiber.

Tom

]]> By: Will Womack http://micronoptics.com/blog/?p=21#comment-6634 Will Womack Thu, 16 Dec 2010 21:46:54 +0000 http://micronoptics.com/blog/?p=21#comment-6634 Hello, Tom. I hope all is well. Do you have any sources for calculating strain on 80 um diameter fiber in pure tension if the tensile load is known? (Similar to the Corning stress calculator for 125 um diameter fiber) Hello, Tom. I hope all is well. Do you have any sources for calculating strain on 80 um diameter fiber in pure tension if the tensile load is known? (Similar to the Corning stress calculator for 125 um diameter fiber)

]]> By: jannah http://micronoptics.com/blog/?p=21#comment-4041 jannah Fri, 21 Aug 2009 05:10:08 +0000 http://micronoptics.com/blog/?p=21#comment-4041 thank you Tom for your information, i'm a student n doing a research on optical fiber sensor. i'm just begin my study. i'm glad to have a feedback from you because i dont have anybody to discuss about optical fiber sensor except my supervisor. thanks again.. thank you Tom

for your information, i’m a student n doing a research on optical fiber sensor. i’m just begin my study.
i’m glad to have a feedback from you because i dont have anybody to discuss about optical fiber sensor except my supervisor.

thanks again..

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