EPOCH 1000 Series Conventional UT B-scan Software Option
Presentation Contents • Overview and Key Features • Required Parts • Option Activation • Creating an Encoded B-scan • Creating a Timed B-scan • Cross Sectional B-scan • Reviewing Acquired B-scan Data • Encoder Calibration
Conventional UT B-scan Option Encoded or time based New cable for connection to B-scan buggy NEW Single Value or Cross Sectional B-scan B-scan software option now available for use in UT mode!
Conventional UT B-scan Option • Available beginning with software version 184.108.40.206 • Once option is purchased it is remotely activated on the EPOCH 1000
Key Features • Three B-Scan Inspection Modes • Bi-Directional encoded • Encoder is active. Scan moves in the same direction as encoder. • Uni-Directional encoded • Encoder is active. Scan moves forward when encoder moves forward or backward. • Manual non-encoded (Timed) • The encoder is not active. B-Scan updates according to a time rate that is set with the PRF control. • Display Modes • B-Scan only (Single Value or Cross-Sectional) • B-Scan and A-Scan simultaneously
Key Features (cont.) • Ability to store ALL A-scans during B-scan collection • EPOCH XT only allowed for A-scan storage on alarm trigger or minimum depth • Maximum Scan Rate has been increased to up to 1200 Hz • With A-Scan Storage active the maximum scan rate is 800 Hz • NOTE: The scan rate is equal to the PRF for values less than or equal to the maximum scan rate.
Key Features (cont.) • B-Scan is compatible with Echo-to-Echo for coated surfaces or when there is a varying water path. • Gate 1 width must be set wide enough to completely cover Gate 2 to avoid loss of signal. • Cross-Sectional B-scan draws the B-scan image based on full A-scan amplitude data, regardless of gate position • Can be viewed live or after a scan has been captured • A-scan storage must be ON in order to view
Parts Required for B-Scan • EPOCH 1000 B-Scan Software Option • EP1000-BSCAN (U8140154) • EPOCH 1000 Encoder Cable • EP1000-ENC-CBL-10 (U8140156) • Also available in 25, 50, or 100 foot lengths • Encoder Buggy • BSCAN-ENC (U8779522) • Transducer • Typically a D790-SM (U8450009) • Transducer Cable: Choose length to match encoder cable • BNC: BCMD-316-10B (U8800194) • LEMO: L1CMD-316-10B (U8800301)
B-Scan Kits • Most customers choose to purchase B-Scan kits that contain the Instrument Software Option, B-Scan Encoder Buggy, and B-Scan Encoder Cable • EP1000-BSCAN-KIT-10: 10 foot encoder cable (U8140160) • EP1000-BSCAN-KIT-25: 25 foot encoder cable (U8140161) • EP1000-BSCAN-KIT-50: 50 foot encoder cable (U8140162) • EP1000-BSCAN-KIT-100: 100 foot encoder cable (U8140163) • The transducer and transducer cable must be purchased separately.
B-Scan Encoder & Accessories D790-SM Transducer Cable Encoder Cable Input Probe Holder Water Input Optional Extension Pole Bracket Optional Magnetic Wheels
Option Activation • The EPOCH 1000 must be updated to Operating Software version 220.127.116.11 or higher • If the B-scan option has been purchased, it can be turned on using the B scan menu
Option Activation (cont.) • If the B-Scan Option is NOT activated in your instrument, contact your local Olympus NDT representative to purchase this option • Once this software option is purchased it can be remotely activated on the EPOCH 1000i via a software code provided
Menus and Interface To turn on the B-scan option, select B Scan > BScan = On When B-scan is turned on, new sets of group menus appear
Menus and Interface (cont.) While B-scan is ON, menu 5/6 will now contain additional parameters and controls for use in B-scan inspections Encoder Used to perform an encoder calibration Cursors Position controls for X and Y sizing cursors Tools Statistics and other post-analysis functions Datalogger and reporting functions will now be located in menu 6/6
B-scan Menu The controls in the B scan menu are as follows: Screen: Selects views of A-scan/B-scan or B-scan only Mode: Starts or Stops B-scan acquisition Source: Selects type of B-scan image single value or cross-sectional Correlated View: Selects alignment of A-scan and image Source: Builds B-scan image from selected Gate
Additional Features • A Minimum Depth Alarm may be used to alert the operator to areas where the part thickness has dropped below a user defined threshold. • The Floating Gate option is included with the purchase of the B-scan software and may be used to set the gate height • Gate can be set at a level from -1dB to -14dB from the height of the gated echo. • Avoid echo drop out when scanning on heavily corroded parts. • Maximize measurement consistency by measuring at the same point on the edge of the echo envelope. • Floating gate can be set in the Gate Setup > Setup menu
Creating an Encoded B-scan • The EPOCH 1000 must be properly setup and calibrated before the B-Scan option is turned ON. • Pulser / Receiver Settings • Calibrate for Zero Offset and Velocity • Gate 1 should be setup to cover the minimum and maximum expected thickness values for the inspection. • The screenshots below show a complete setup ready for B-Scan to be turned on.
Equipment Setup • For encoded B-scans, a positional encoder is used to track distance traveled along the scan axis. • The standard encoder for use with B-scan is the encoder buggy • Insert your transducer into the B-scan buggy and tighten the thumb screws to secure • Attach the transducer cable to the transducer and to the EPOCH 1000 • Attach the encoder cable to the encoder buggy and EPOCH 1000
Encoded B-scan Setup • Now you are ready to set up your B-scan using the following steps: • Turn ON the option in the B Scan > BScan menu. • Once the B-scan option is turned on, additional B-scan parameters will display in the menu.
Encoded B-scan Setup (cont.) • Select B Scan > Setup to enter the setup screen • Choose an Encoder Mode (Uni or Bi-directional) • Select a Direction (will determine the display view of the A-scan and B-scan image) • Set your Scan Resolution (spacing between B-scan points) • This value will determine the maximum scanning speed.
Encoded B-scan Setup (cont.) • The Encoder Resolution for the B-scan encoder buggy is 200 pulses/in. (7.87 pulses/mm) • If you are using a different encoder, you should perform an encoder calibration to determine the encoder resolution. • The value from the encoder calibration will automatically populate from the encoder calibration • For instructions on how to calibrate the encoder, please use the following link: Encoder Calibration
Encoded B-scan Setup (cont.) • Set the desired Start and End Co-ordinates for the scan • Select whether to Save Ascan images • You must be saving A-scan images in order to create a cross-sectional B-scan • If a cross-sectional B-scan for Gate 2 is being used, select the Amplitude Decimation factor • Gate 1 amplitude compression is automatically set to maximum • The current Scan File Size based on the selected parameters is displayed. • This parameter cannot exceed the Max File Size of approximately 70Mb • Press the [ESCAPE] key to return to the live screen.
Collecting B-scan Data • To acquire data for your B-scan • Set the B Scan > Mode to Start • Move your B-scan buggy and transducer along your test piece at the appropriate scan rate so that you do not receive an LOS measurement
A/B-Scan View Min Depth Alarm Areas of Scan below Minimum Depth Thickness limits defined by Gate1 Start and Width Encoded Scan axis
Creating a Timed B-scan • The EPOCH 1000 must be properly setup and calibrated before the B-Scan option is turned ON. • Pulser / Receiver Settings • Calibrate for Zero Offset and Velocity • Gate 1 should be setup to cover the minimum and maximum expected thickness values for the inspection. • The screenshots below show a complete setup ready for B-Scan to be turned on.
Timed B-scan Setup • Now you are ready to set up your B-scan using the following steps: • Turn ON the option in the B Scan > BScan menu. • Once the B-scan option is turned on, additional B-scan parameters will display in the menu.
Timed B-scan Setup (cont.) • Select B Scan > Setup to enter the setup screen • Set the Encoder Mode to Timed • Select a Direction(will determine the display view of the A-scan and B-scan image) • Select whether to Save Ascanimages • You must be saving A-scan images in order to create a cross-sectional B-scan
Timed B-scan Setup (cont.) • If a cross-sectional B-scan for Gate 2 is being used, select the Amplitude Decimation factor • Gate 1 amplitude compression is automatically set to maximum • The current Scan File Size based on the selected parameters is displayed. • This parameter cannot exceed the Max File Size of approximately 70Mb. • Press the [ESCAPE] key to return to the live screen.
Collecting B-scan Data • To acquire data for your B-scan • Set the B Scan > Mode to Start • Move your transducer along your test piece at the appropriate scan rate so that you do not receive an LOS measurement NOTE: If the scan is moving too quickly, lower your PRF to reduce the scan speed!
A/B-Scan View Min Depth Alarm Areas of Scan below Minimum Depth Thickness limits defined by Gate1 Start and Width Timed Scan axis
What is a Cross-Sectional B-scan? • A-scans digitized and mapped to color scale based on amplitude values • Points are plotted so that the colors are positioned at the proper depth • A-scans from successive transducer positions are "stacked" to form a true few cross-sectional image 1 2 Transducer movement 3 Part depth
What is a Cross-Sectional B-scan? (cont.) • The depth axis on a cross-sectional B-scan uses the entire screen range, rather than just the gated region as on a single value B-scan Depth (screen range) Scan axis (encoded or timed)
Single Value vs. Cross Sectional Single Value B-scan “Traditional” EPOCH B-scan view Same as EPOCH III, EPOCH 4, EPOCH XT, 37DLPlus, 38DLPlus, etc. Draws a profile view of the test piece based on the gated single thickness value per index Most commonly used in corrosion scanning applications
Single Value vs. Cross Sectional (cont.) Cross Sectional B-scan Much more similar to phased array images (zero degree linear scan) Draws the B-scan image based on full A-scan amplitude data, regardless of gate position More commonly used in zero degree laminar applications
Completing a B-scan • Once you have acquired all the data from a particular section or have finished your entire scan, you can choose to Stop or Freeze the B-scan. • Stopping a scan will complete the scan. New B-scans will be started from the start coordinate • Freezing a scan will bring you to Review mode. When the scan is unfrozen you can continue the scan from the point where the scan was frozen. vs. B Scan > Mode [FREEZE]
Saving Files • B-Scan files may be stored in any file type in the EPOCH 1000. The most common are: • Calibration (CAL) Files: Used to store B-Scan setups • Incremental (INC) Files: Used for most inspection data storage • When the [SAVE] key is pressed the instrument saves the entire B-Scan along with stored A-Scans and the instrument setup. • Saved B-scan files can be recalled as a setup, if desired, through the Files > Open menu in the datalogger • After recalling a file, press the [FREEZE] key to enter Review Mode
Start/Stop Function • The Start/Stop function is used to end your B-scan • For convenience, the [CHECK] key can also be pressed when Start is highlighted to Stop a B-scan. • Once a B-scan is stopped, you will need to save and recall the scan in order to review the data. • When the B-scan is started again it will create a new scan from the start point rather than resume from the last captured point.
Freeze Function • When you have finished your scan section, or to pause and review your acquired data, press the [FREEZE] key to enter Review Mode. • An “F” icon will display to the left of the scan to indicate that you are reviewing a frozen scan. • The Start/Stop Mode controls will be disabled when review mode is active.
Freeze Function (cont.) • Entering Review Mode allows use of the following functions/features, which are explained further in this section: • Image cursors (D.T.) • Sizing cursors (X, Y) • Changing gate source data (Gate 1 or 2, single value or cross-sectional)
Cursors • Once a B-scan is acquired, you can perform basic on-board analysis in Review Mode using available cursors • Sizing cursors (X, Y) and DT cursor are available in the Cursor menu
Distance Traveled (D.T) Cursor • The distance traveled (D.T.) cursor selects a specific distance or timed point along the scan axis. • For encoded B-scans, the D.T. cursor will select a specific position along the scan axis in inches or mm. • For timed B-scans, this cursor will correspond to a specific screen pixel along the scan axis. • To adjust the D.T. cursor select Cursors > D.T. • The cursor will display as white lines on the B-scan image.
Distance Traveled (D.T) Cursor (cont.) • If selected in B-scan setup, a compressed A-scan will be stored for each point on the B-scan. The D.T. cursor is used to choose a particular B-scan point to view the A-scan image. • To view stored A-scans along with the B-scan, set the B Scan > Screen view to A/B Scan
Sizing Cursors • Sizing cursors are available for basic flaw sizing on the B-scan image • Based on your screen view, the X and Y cursors will be correspond to part depth (thickness) and scan axis (distance or time) • The X and Y cursors will form a shaded box around the selected area for easier viewing. • To turn the sizing cursors ON, select Cursors > Cursors. • The X and Y cursors can then be adjusted to take measurements in both directions along the scan. • If you are selected in Auto mode, the relevant cursor measurements will be displayed in the measurement boxes above the scan.