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ODiSI 6

 
 

 

ODiSI 6 

User’s Guide 

Page 92 

 

9

 

Additional Information 

 

Sensing Results near the Fiber Termination 

One common question about sensing with the ODiSI is, “How close to the end of the 
sensor will I get strain/temperature results?

” The answer to this question is determined 

by three parameters: 

1.

 

Where is the physical sensor termination inside the protective tube? 

2.

 

How does the ODiSI software locate the sensor termination? 

3.

 

How much space does the ODiSI 6000 put between where it locates the sensor 
termination and the end of strain or temperature sensing?

 

 
Consider the illustration of the termination end of a Luna fiber sensor: 

 

Figure 9-1: Illustration of the termination end of a Luna fiber sensor

 

1.

 

There is some variation in the position of the physical sensor termination in the 
protective tube. The goal is to place the physical sensor termination near the 
middle of the protective tube. The protective tube is 

≤ 1 cm long. No strain or 

temperature results are possible for the length of the protective tube. 

2.

 

The structure and width of the termination will cause some variation in where 
exactly the termination event is located by the software. The ODiSI 6000 control 
software is looking for the point in the optical data at which there is the steepest 
drop from the sensor scatter level down to the instrument’s noise floor. 

3.

 

The ODiSI 6000 control software will end its strain/temperature sensing 1 cm 
before the detected sensor termination event. This 1 cm is a fixed quantity in the 
ODiSI 6000 control software. It is necessary because the termination splice has 
some width and sensing is not possible where the sensing fiber is contaminated 
by the termination. 

 
Typically, the sensing ends ~1.5 cm from the far end of the protective tube. The worst-
case occurs when the termination is at the very beginning of the surrounding protective 
tube. In that case the length for the sensing dead zone at the end of the sensor is equal 
to the 1 cm protective tube plus 1 cm of fiber, or 2 cm total. 

Содержание ODiSI 6

Страница 1: ...User s Guide ODiSI 6...

Страница 2: ...RoHS released into the environment Please contact your local waste authority for instructions on proper recycling of the electronic product s described in this User Guide Optical Distributed Sensor In...

Страница 3: ...or Data Logging 13 Run a Test 13 View Test Data 14 5 Software Quick Start Guide 14 Operational Parameters 14 Installing a Sensor 15 View and Evaluate Sensor Status 16 Set Up the ODiSI for Data Logging...

Страница 4: ...age Configuration 66 Update Feature Keys 68 Time Synchronization Settings 68 Help 69 Documentation 69 Send us feedback 70 Update 71 Language 72 About 73 7 ODiSI Remote Operation 74 ODiSI Remote Applic...

Страница 5: ...Contents 87 Example 89 Tare Message 89 Contents 89 Example 91 Receiving Messages Across TCP Packets 91 9 Additional Information 92 Sensing Results near the Fiber Termination 92 System Operation Guidel...

Страница 6: ...neighboring gage High Definition HD Sensor A fiber sensor that provides a unique Rayleigh scatter signature that the ODiSI instrument can use to make distributed strain or temperature measurements Mea...

Страница 7: ...and the remote module This length does not count toward the system s sensor length The ODiSI instrument can be used with several different standoff cable lengths with RLC connectors on each end 10 m...

Страница 8: ...n La protection fournie par l quipement peut tre compromise si l quipement est utilis d une mani re non sp cifi e par le fabricant entra nant des blessures graves ou la mort Le cordon d alimentation e...

Страница 9: ...temperature measurements throughout the length of the fiber at intervals as low as 0 65 mm Figure 3 1 ODiSI sensor fiber ODiSI Instrument Specifications The ODiSI platform is available in several cha...

Страница 10: ...is User s Guide uses examples and graphics from a setup with multiple sensors It is important to note however that whether the system is set up for one or multiple sensors the hardware setup and the a...

Страница 11: ...r Bulkhead Cleaners Optical Fiber Connector Cleaner Flash drive with user guides and recovery software ODiSI Power Cord Laptop Power Adapter USB3 Type A to B cable Assembly 1 Remove all the components...

Страница 12: ...for each remote module that came with the configuration 7 Unpack and set up the instrument controller laptop according to the manufacturer s instructions 8 Connect the ODiSI 6 to the controller using...

Страница 13: ...ain actions 1 Configure operational parameters 2 Install sensors 3 View and evaluate sensor performance 4 Set up the ODiSI for data logging 5 Run a test 6 View test data Operational Parameters When th...

Страница 14: ...vating sensors deleting deactivated sensors and exporting sensors For more information see Manage the Sensor Repository View and Evaluate Sensor Status Once a sensor is identified and added to a parti...

Страница 15: ...back through the Play Back Test Data function and can be converted to human readable tab delimited tsv files through the Generate Test Data TSV Files function These TSV files can be opened in external...

Страница 16: ...on status field shows Ready Installing a Sensor 1 Install a sensor a Plug the flash drive containing the sensor key into a USB port of the ODiSI controller b Open the menu by clicking the button in th...

Страница 17: ...here the sensor key is located select it and click the Open button f Click Close to exit the Manager Sensors window Figure 5 3 Manager Sensors window with Install Sensor dialog View and Evaluate Senso...

Страница 18: ...Settings dialog and then choose 1 3 mm from the Gage Pitch drop down For the ODiSI 6000 Series choose 5 2 mm from the Gage Pitch drop down Figure 5 4 General Settings menu item Figure 5 5 General Sett...

Страница 19: ...g the sensor Click on the Save Tare button and give the Tare a name 7 Define additional Gages and Segments using Touch to Locate a Click on the Start Touch to Locate button b Apply a localized hot or...

Страница 20: ...e ODiSI for Data Logging 1 Set up test data file saving a Ensure Save Test is checked Figure 5 9 Check the Save Test checkbox b Click on File Set Test Data File Save Options to specify the test name n...

Страница 21: ...ata file saving properties 2 Adjust measurement rate a Click the File Filter and Downsample menu item Figure 5 12 Filter and Downsample menu item b Click the check box next to Temporal Downsampling Fa...

Страница 22: ...actor Run a Test 1 Lock the current test configuration and prepeare the ODiSI to acquire data by clicking the Arm button The Sensor Plot screen will be displayed 2 Click the Start button to start logg...

Страница 23: ...14 Sensor Plot screen updates with live data after clicking Start 3 View sensor single plot screen by selecting the Single Plot from the associated drop down menu Figure 5 15 Plot type selection 4 Th...

Страница 24: ...e drop down menu Figure 5 17 Select Gage Plot 6 The Gage Plot will be displayed Enable plotting for individual gages on the Gage Plot by checking the corresponding checkboxes in the list The color for...

Страница 25: ...18 Enable plotting for some gages Figure 5 19 Live plot for the enabled gages over time 7 Click the Stop button once the test is complete View Test Data 1 Play back test data a Click the Tools Playba...

Страница 26: ...he Test Data file to view c Play back or scroll through the test data using the navigation buttons Figure 5 21 Playing back the test data 2 Convert binary test data into ASCII format a Click the Tools...

Страница 27: ...the desired Test Data file s Add them individually or in a batch Then click Save Figure 5 23 Select Test Data file s for conversion to TSV file s c Select the folder to which TSV files will be written...

Страница 28: ...ODiSI 6 ODiSI 6 User s Guide Page 27 Figure 5 24 Completion status for generating TSV file s...

Страница 29: ...n for each sensor Figure 6 1 Main Sensor Properties screen Instrument Status The system Status is indicated in the top left corner The status displayed is one of the following Initializing The softwar...

Страница 30: ...h remote modules cannot be used simultaneously during the same test configuration Luna CFG Sensing Continuous Fiber Grating CFG sensors sold by Luna Rather than utilizing the intrinsic Rayleigh backsc...

Страница 31: ...sensor that is connected to a given channel on the ODiSI It is recommended to name the installed CFG sensors so that they are more recognizable to the user See the Manage the Sensor Repository sectio...

Страница 32: ...ger than 50 m and 0 65 mm not available for sensors longer than 20 m long For the ODiSI 6000 Series there are two Gage Pitch selections 1 04 cm only for SC Temperature sensors and 5 2 mm Select the Ga...

Страница 33: ...each channel This rate depends on the sensor length Measurement Mode Gage Pitch Performance Mode and number of channels Loaded Test Configuration Displays the name of the configuration file that was...

Страница 34: ...ve test configuration but there is a problem that needs to be resolved before making measurements Information button Displays detailed information for the specific channel comparing the expected confi...

Страница 35: ...t the connected sensor Figure 6 5 Clicking the Advanced button shows additional optical information Remote Module Indicates the type of remote module detected on each channel either no remote module d...

Страница 36: ...ultant measurement rate per channel is 25 00 Hz Channel 1 A 10 27 m strain sensor has been identified and added to the configuration of Channel 1 and this channel is ready for making measurements The...

Страница 37: ...the serial numbers of all sensor keys installed on the controller Name Lists the user assigned names associated with all sensor keys installed on the controller Rename Click to change the name associa...

Страница 38: ...y including Tares Rekeys and Gages and Segments Export Sensors Click to export the entire installed sensor folder including Tares Rekeys and Gages and Segments to a flash drive or CD drive Figure 6 8...

Страница 39: ...splicing a broken sensor taking the sensor to higher strain ranges re centering the strain and temperature range around a new point and permanently removing strain gradients induced in the sensor For...

Страница 40: ...Gage to the Gage list 2 Cursor To display the cursor click once on the plot To place the cursor at a specific location double click on the plot The cursor on the graph can also be moved manually by pl...

Страница 41: ...an be rescaled to better view features in the measurement data Unconstrained Zoom In Out To zoom in on data in both X and Y move the mouse cursor to the region of interest and use the scroll wheel to...

Страница 42: ...r test data files along with time stamps Save Test Check to log data Click on the File Set Test Data File Save Options menu item to specify the test name notes and destination folder Figure 6 12 Menu...

Страница 43: ...ata file dialog accessed via the Browse button To save a file to an external drive click the external drive button which will navigate to an external drive connected to the controller through USB Figu...

Страница 44: ...16 Manage Test Data menu item 2 To move test data files select one or more test data files and or directories in the left pane of the window To select more than one file or directory hold the ctrl or...

Страница 45: ...les to a USB CDROM drive a Select the drive type on the left file browser b If using a USB drive select the desired directory on the left file browser c Select the files and or directories to copy on...

Страница 46: ...rom USB CDROM Copying Test Data TSV Files To copy test data tsv files to from an external drive click File Copy Test Data TSV Files Figure 6 21 Copy Test Data TSV Files menu item 1 To copy files to a...

Страница 47: ...Figure 6 22 Copy tsv files to USB CDROM 2 To copy files from a USB CDROM drive a Select the drive type on the left file browser b Select the files and or directories on the left file browser c Navigat...

Страница 48: ...Settings menu by clicking Settings General Figure 6 24 General settings menu item Measurement Mode Select the Measurement Mode that matches the sensor lengths and remote modules connected to each cha...

Страница 49: ...sor lengths and Gage Pitch selection X Axis Units Select length units from the drop down menu Use Patch Cord Check if using a patch cord fiber jumper between the remote module and the sensor Required...

Страница 50: ...found in section ODiSI Measurement Streaming Protocol OMSP Luna also provides the ODiSI Remote application which gives the ability to Arm Start Stop and Disarm the ODiSI controller software from a re...

Страница 51: ...nt connected The Test Name and Notes are included as Metadata to the client Remote Enabled Check to enable remote control of the ODiSI control software The Remote Control allows the user to connect to...

Страница 52: ...external electrical triggers BNC port number 2 on the back of the instrument controls the hardware trigger to start logging data BNC port number 3 controls the hardware trigger to stop logging data Bo...

Страница 53: ...Sensor Select the Strain Settings menu by clicking Settings Strain Figure 6 32 Strain settings menu item Y Axis Units Displays the Y Axis Units for Strain Figure 6 33 Strain settings dialog Temperatu...

Страница 54: ...C F K Temperature Offset When used together with a Tare for the temperature sensor the temperature offset effectively converts the temperature change measurements into absolute temperature Figure 6 3...

Страница 55: ...ective Gage Pitch The gage pitch when taking into account any specified spatial down sampling This represents the nominal spacing between reported gage results Temporal Moving Average Size Specifies t...

Страница 56: ...Output Range Select the desired output range 10V to 10V 0V to 10V 0mA to 20mA Scale Output scale based on the selected output range DAC Channel Corresponds to the 16 channels on the USB 3106 Channel...

Страница 57: ...a logging Click Disarm to exit data logging mode Start Stop Click the Start button to display save and stream measurement data immediately Click the Stop button to end these processes In order to chan...

Страница 58: ...ture axis on the right Figure 6 40 Sensor Plot screen Gage Plot The Gage Plot screen displays measurements from individual Gages as a function of time once a test has Started Active sensors are listed...

Страница 59: ...ay Back mode the measurement data can be viewed with the same plot visualizations as the live data Furthermore measurement data can be still be streamed using OMSP when in Play Back mode Note that the...

Страница 60: ...f a play back file has associated clip files it will have a small right arrow next to the file name for example Clip files are previously defined smaller sections of a larger test data file Clicking t...

Страница 61: ...s the measurements backward Each successive click will cause the rewind speed to double until a maximum speed is reached Play button Starts file play back Pause button Play button converts to pause bu...

Страница 62: ...reate Clip Creating a clip allows for playing back a smaller section of the test data file Clicking this will display clip controls Figure 6 46 Scroll bar slider with clip definition arrows Start and...

Страница 63: ...est data in the player click Tools Generate Current Test Data TSV File Figure 6 49 Generate Current Test Data TSV files menu item Generate TSV File The test data collected during a test is stored in a...

Страница 64: ...s into TSV files After file selection the TSV Directory window pops up Gages Segments Check to generate a TSV file containing all Gages and Segments Full Check to generate a TSV file containing measur...

Страница 65: ...information stored as header lines After the header rows each row of the data file is a measurement scan from the sensor After the header rows each column of the data file is a Gage location along the...

Страница 66: ...ODiSI 6 ODiSI 6 User s Guide Page 65 Figure 6 53 Example test data TSV file...

Страница 67: ...ick Configuration Save Configuration to save the current settings used to configure the ODiSI Type the configuration name in the Save Configuration dialog Figure 6 54 Save configuration Load Configura...

Страница 68: ...oad Default Configuration Click Configuration Default Configuration to specify a saved configuration that will be used when the ODiSI software is started Figure 6 58 Set default configuration To remov...

Страница 69: ...60 Update Feature Keys menu item Time Synchronization Settings Click Tools Time Synchronization Settings to bring up the Time Synchronization Settings dialog Figure 6 61 Time Synchronization Settings...

Страница 70: ...NTP settings and start NTP synchronization To start NTP automatically when the ODiSI software is started check the Start NTP Automatically checkbox Figure 6 62 Time Synchronization Settings dialog Hel...

Страница 71: ...n sub menu Send us feedback Figure 6 64 Send Us Feedback menu item Generate a report on any issues encountered while running the ODiSI software or feature requests associated with software functionali...

Страница 72: ...6 65 Form for providing feedback to Luna Update Figure 6 66 Software update menu item Update the ODiSI software to the latest version or downgrade to a previous version The ODiSI software will automat...

Страница 73: ...67 Dialog to select software update file Language Select the language to be used in the ODiSI software user interface The ODiSI software must be restarted for the language selection to be applied Figu...

Страница 74: ...ide Page 73 About Figure 6 69 About info menu item Displays the ODiSI software version information connected hardware information list of optional installed features and Luna contact information Figur...

Страница 75: ...ain ODiSI control software s Streaming Properties tab Click the plug head button which will change from red to green upon successful connection The ODiSI Remote application provides limited remote con...

Страница 76: ...in which the remote control application sends a command and the ODiSI controller application provides a status update in response This remote control connection is facilitated over a TCP IP network co...

Страница 77: ...be replaced by an integer value where 1 the number of ODiSI channels ODiSI Controller Status The following table describes the status messages that are sent back to the remote control application afte...

Страница 78: ...is replaced by an integer value where 1 the number of ODiSI channels status add_channel_failure Indicates adding the channel to the test configuration was a failure The hashtag number sign is replaced...

Страница 79: ...sensors Remote turns on saving test data file remote set_filesave_on status filesave_on Controller sets file saving on provided name or is blank if no sensor is identified The number of commas in the...

Страница 80: ...mote getfilesave Remote adds channel remote add_channel status add_channel_success Add channel succeeded status add_channel_failure Add channel failed status configured_sensors TEXT Controller sends l...

Страница 81: ...disarm status ready Instrument is disarmed and is back to a ready state status notready Software controller has an incorrect configuration or no sensors connected Remote requests download of latest te...

Страница 82: ...n the gage values generated from a single measurement Tare messages contain the value of the tare that has been applied to the measurements This is provided in case the client wants to store informati...

Страница 83: ...message starts at the beginning of a new TCP packet Message Types Four types of messages are transmitted over the streaming protocol an initial acknowledgement a Measurement Message a Metadata Messag...

Страница 84: ...ws the closing curly brace of the JSON text A CRC 16 ANSI 0x8005 checksum encoded as 4 hexadecimal characters follows the carriage return plus line feed A NULL character follows the checksum and marks...

Страница 85: ...Decimal number indicating length in meters Gage pitch gage pitch mm Decimal number indicating the spacing between individual gages along the sensor Sensor type sensor type String Strain Temperature or...

Страница 86: ...producing data When the system is stopped the system will send Metadata Messages only When the system is measuring it will send both Metadata and Measurement Messages No changes will be made to the s...

Страница 87: ...nsor serial number FS02017LUNA001234 sensor part number HDS05LC220P length m 5 1 spacing mm 2 476302 sensor type strain units microstrain gages gage name Left front location mm 1456 gage name Left mid...

Страница 88: ...mestamp The Measurement Message includes a timestamp which is split into separate JSON fields for year month day hours minutes seconds and milliseconds There is also a field to indicate the time zone...

Страница 89: ...8 5 OMSP Measurement Message Header Description JSON name Value Message type message type String measurement Message format version message version Integer 2 is the current version Product product St...

Страница 90: ...2017ODB10032 sequence number 125 year 2017 month 1 day 13 hours 13 minutes 23 seconds 14 milliseconds 56 time zone EST UTC 5 channel 1 number of gages 4 data 805 754 5 null 901 quality factor 0 3544 0...

Страница 91: ...may not be able to calculate a strain or temperature value for a certain gage In these events the ODiSI reports NaN as the gage value Number of Gages The element number of gages indicates the length o...

Страница 92: ...has been received Concatenate multiple TCP packets until a NULL character is received The four characters preceding the NULL should be interpreted as a checksum Everything preceding the checksum shou...

Страница 93: ...e protective tube is 1 cm long No strain or temperature results are possible for the length of the protective tube 2 The structure and width of the termination will cause some variation in where exact...

Страница 94: ...needs to be prepared scuffed and cleaned with ethanol and the fiber needs to be uniformly bonded down Epoxy selection is also very important as it determines cure temperature optimal temperature rang...

Страница 95: ...manner The sensing fiber is experiencing uniform vibration over the sensing length The effect is building along the sensing length Reduce test parameters of the loading structure i e load amplitude a...

Страница 96: ...use s Solution s The ODiSI 6 and or the controller is not plugged in or turned on and the controller battery is dead if applicable The ODiSI 6 and the controller require separate power cords Plug in t...

Страница 97: ...le and remote module to minimize signal degradation and to arrive at a more ideal physical configuration Cracks in bulkhead connector alignment sleeve Contact Luna Technologies at 1 866 LUNAOVA or sol...

Страница 98: ...ware Exit the software Turn the instrument off and then back on again Restart the controller and the control software The USB cable is faulty Replace the cable Communication Error Turn computer off Tu...

Страница 99: ...155 State Street Blacksburg VA 24060 Main Phone 1 540 961 5190 Toll Free Support 1 866 586 2682 Fax 1 540 961 5191 Email solutions lunainc com Website www lunainc com 2020 Luna Innovations Incorporate...

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