Introducing the ODiSI-B 5.0

We have launched a significant upgrade to the ODiSI (optical distributed sensor interrogator) strain and temperature sensing platform. The ODiSI-B 5.0 upgrade is the result of continued engineering development and provides a number of valuable new capabilities including a new High-Speed CFG sensing option* to support more dynamic testing environments.  The new High-Speed CFG option complements perfectly the High-Definition sensing, which uses one of the most economically priced strain sensors on the market while still offering customers higher performance over traditional point sensing solutions. The new ODiSI-B 5.0 comes with new ruggedized cables and connectors, and a data visualization and CAD integration option* to provide engineers an immediate and intuitive understanding of test results. The ODiSI’s strain sensors are manufactured and calibrated to a NIST traceable standard and will now come with a certificate of conformance.

.

Download_Datasheet

Download_onepager

 ODiSI-B 5.0 – New Features

TWO SENSING OPTIONS:  HIGH-DEFINITION AND HIGH-SPEED CFG*

High-Definition sensors offer a lower priced consumable sensor with ultra high spatial resolution; The High-Speed Continuous Fiber Gratings (CFG) option has greater dynamic sensing capability while still offering high spatial resolution.

ROBUST SENSING WITH RUGGEDIZED CABLE AND CONNECTORS 

Industrial grade stand-off cable and connectors are suitable for harsh environments and rough handling.  The optical network has been upgraded and offers significantly higher tolerance to ambient vibration.

3D DATA VISUALIZATION WITH CAD INTEGRATION* 

The high spatial resolution of the ODiSI reveals important information about test articles not visible with traditional sensing methods. Luna’s new data visualization tool set helps engineers to quickly identify key areas of interest, reduce file size, analyze data and generate reports.

See data visualization in action in videos here and here!

STRAIN SENSORS WITH NIST-TRACEABLE CALIBRATION

Strain sensors are calibrated to NIST-traceable standards.  A certificate of conformance is shipped with every strain sensor.

 *High-Speed CFG module and 3D data visualization package sold as options.

 

The ODiSI in Action – High Definition Fiber Optic Sensing (HD-FOS)

<
>
Bonding a fiber sensor along a test article

Up to 1000 measurements per meter of fiber

A fiber sensor constructed of unaltered fiber optic cable can be mounted on the surface of a structure or embedded within it.  At left, a fiber is routed in a serpentine fashion, making four passes along a beam. Two of the passes are routed adjacent to machined holes, which are known areas of stress concentration.

Strain as a function of position along the fiber

HD-FOS to find gradients and hot spots

Strain (or temperature) is plotted as function of position along the sensor.  This continuous line of high definition data allows engineers to eliminate the uncertainty of locating hot spots and gradients.  The image at left shows the strain profile of a beam in deflection. A fiber sensor is routed making four passes along the test article.  High gradients resulting from the machining’s are clearly visible in the center two passes.

Internal post processing allows closer inspection

Zooming in on the critical areas

The high definition data is stored by the ODiSI and can be accessed by a separate post processing tool.  This tool allows the user to zoom in on areas of high gradients.  Graphs can be exported for use in test reports.

Strain as a function of time

Using software to define points or segments

Because the sensors used with HD-FOS do not require fiber Bragg gratings the ODiSI user software can be used to redefine both gage length and gage location.  Specific points or even segments within the sensor can be defined and strain (or temperature) of those points plotted versus time.

2D color coded visualization of strain

Simplifying the visualization

To simplify the understanding of critical points within structures or equipment, a graphical image can be imported into the ODiSI user software and strain (or temperature) data mapped to the image.

Exporting high definition data

Mapping the contour of strain or temperature

High definition data can be exported and used to create fully contoured strain or temperature maps.  The data at left is a strain map from one of the four sensor runs.  The data shows the value of strain from zero deflection to maximum deflection.  Clearly visible are the four strain peaks associated with the four machined holes in the test article.  This type of data gives a full picture of the state of strain (or temperature) concurrent with the transitions of the load state.

Bonding a fiber sensor along a test article

ODiSI_Bonding_TestArticleUp to 1000 measurements per meter of fiber

A fiber sensor constructed of unaltered fiber optic cable can be mounted on the surface of a structure or embedded within it.  At left, a fiber is routed in a serpentine fashion, making four passes along a beam. Two of the passes are routed adjacent to machined holes, which are known areas of stress concentration.

 

Strain as a function of position along the fiber

Measuring_strain_bondedstructure.HD-FOS to find gradients and hot spots

Strain (or temperature) is plotted as function of position along the sensor.  This continuous line of high definition data allows engineers to eliminate the uncertainty of locating hot spots and gradients.  The image at left shows the strain profile of a beam in deflection. A fiber sensor is routed making four passes along the test article.  High gradients resulting from the machining’s are clearly visible in the center two passes.

Internal post processing allows closer inspection

ODiSI_PostProcessingZooming in on the critical areas

The high definition data is stored by the ODiSI and can be accessed by a separate post processing tool.  This tool allows the user to zoom in on areas of high gradients.  Graphs can be exported for use in test reports.

 

 

 

Strain as a function of time

Post_ProcessingUsing software to define points or segments

Because the sensors used with HD-FOS do not require fiber Bragg gratings the ODiSI user software can be used to redefine both gage length and gage location.  Specific points or even segments within the sensor can be defined and strain (or temperature) of those points plotted versus time.

 

 

2D color coded visualization of strain

Data_VisualizationSimplifying the visualization

To simplify the understanding of critical points within structures or equipment, a graphical image can be imported into the ODiSI user software and strain (or temperature) data mapped to the image.

 

 

 

Exporting high definition data

ODiSI_ContourMapMapping the contour of strain or temperature

High definition data can be exported and used to create fully contoured strain or temperature maps.  The data at left is a strain map from one of the four sensor runs.  The data shows the value of strain from zero deflection to maximum deflection.  Clearly visible are the four strain peaks associated with the four machined holes in the test article.  This type of data gives a full picture of the state of strain (or temperature) concurrent with the transitions of the load state.

 
ODISI A

The ODiSI A offers the user greater flexibility in instrumentation by allowing the user to define a virtual gage through selecting both gage length and gage position. The ODiSI A also offers a maximum sensor length of 50 meters vs the 20 meter maximum for ODiSI B.

 

Application Example

Method for setting up the ODiSI-A to measure thermal mixing of two air jets.  See video here.