Olympus EPOCH LT超声波探伤仪

• 可存储多达100个校准设置以及2000个厚度测量值。
  

• 可选增容的内存可存储多达500个校准设置以及10000个厚度测量值。
  

Remote Activation
EPOCH series advanced software options remotely activated at any time after acquiring the instrument. There is no need to send the instrument back for updates. 

Availability On Instrument
The availability for each option on the various EPOCH series instruments is defined using the following key:

 API 5UE

API 5UE - The API 5UE software option for the EPOCH series is intended to assist with performing inspections in accordance with the American Petroleum Institute's Recommended Practice 5UE. This practice was developed specifically for OCTG manufacturers to inspect and characterize inner-diameter (ID) cracking in newly fabricated pipe. The API 5UE code uses two crack sizing methods to characterize ID cracking: the Amplitude Comparison Technique (ACT) and the Amplitude-Distance Differential Technique (ADDT). The software aids in performing the ADDT method, which is based on the formula:

d i =Amax(T 2 -T 1 )k

API 5UE inspections are accomplished using the Peak Memory function on the EPOCH 4 flaw detectors to draw a peak envelope of the crack signal and quickly capture the Amax, T1 and T2 points using a single key press. Using this collected data from the peak envelope, the EPOCH flaw detector performs the necessary calculation using the formula above and displays the crack height in the upper right corner of the screen.

The ADDT inspection method can also be performed using the API 5UE software in a manual mode, allowing the operator to manually select the values for Amax, T1 and T2. All API 5UE data can be easily stored using the EPOCH 4 series datalogger, and the full inspection data can be downloaded to a PC using the EPOCH 4 series interface program, GageView Pro.

 AWS

AWS - The AWS D1.1/D1.5 software option for the EPOCH series is intended to assist with performing inspections covered under the American Welding Society D1.1 and D1.5 Structural Welding Code for steel. This code provides inspectors with a method to classify discontinuities found in welds using ultrasonic inspection. This code uses the following formula to develop an indication rating for a reflector found during an inspection:

A = Discontinuity Indication Level (dB) 
B = Reference Indication Level (dB) 
C = Attenuation Factor: 2 * (soundpath in inches - 1 inch) (dB) 
D = Indication Rating (dB)

An AWS D1.1 inspector must take the Indication Rating (D) that is calculated based on A, B, and C to an Ultrasonic Acceptance - Rejection Criteria table produced by the AWS in order to classify the severity of the discontinuity that has been located. 


AWS Indication Ratings are displayed in the upper right corner of the A-Scan display, as seen above. once a proper angle calibration has been performed, the operator selects a reference indication and stores this indication gain level is as the "B" value using the AWS software option. All indications captured after this setup are assigned a "D" value automatically, eliminating the need for manual calculations. All data from AWS D1.1/D1.5 inspections can be saved and recalled at a later time using the EPOCH 4 series datalogger, including setup parameters, indication screen shots, and the values of A, B, C and D for each saved indication.

 ADT

ADT - The Advanced DAC/TVG (ADT) software option is intended to significantly enhance the functionality of the standard DAC/TVG options already available on the EPOCH series flaw detectors, allowing users to customize inspections to their unique application requirements. The ADT feature incorporates the high-quality capabilities that adhere to ASME, ASME-3 and JIS sizing codes of standard DAC/TVG options with direct control of gain, range and zero offset, as well as reference and transfer correction. In addition, the ADT option provides new features such as 20%-80% DAC curves, customizable DAC curves, and a user-defined TVG table to meet advanced and unique inspection needs. ADT also allows the user to toggle between DAC and TVG views in many of its functions, allowing the operator the freedom to utilize both techniques during a single inspection.

Advanced DAC Options ADT's enhanced Distance Amplitude Correction functionalities allow more user control over the information acquired and displayed while sizing flaws compared to known reflector amplitude returns. A DAC curve is used to plot amplitude variations of signals from reflectors of the same size, but at different distances from the surface. A single DAC curve is used to plot the peak amplitude of each reflector at different depths within a material to compare with peak amplitude returns from unknown flaws. In the ASME-3 criteria, three DAC curves are plotted: one at peak amplitude, one 6dB below this point (indicating a reflector 50% the size of the reference), and one 14dB below the peak amplitude point (indicating a reflector that is 20% the size of the reference). Advanced DAC takes this functionality many steps further. The operator now has the option to customize up to three DAC curves at user-defined levels between +6dB and -24dB from the primary DAC curve. Additionally, since DAC curve inspections are not valid in most applications when a reflector is below 20% of full screen height, the ADT software allows a new dynamic 20%-80% function, which automatically adjusts the gain of reference signals below 20% up to 80% during setup. This allows a great range for inspections while minimizing the necessary manual gain adjustment. Should gain adjustment be necessary, the Advanced DAC and TVG functions now have a reference correction feature that provides the operator with a digital amplitude measurement of reflectors that is directly compared to the DAC curve level, even with significant gain adjustment during the measurement.

Additionally, any DAC curve or curves set up using the standard or advanced functions are now interchangeable with TVG tables with a single push of a button.

Advanced TVG Options In addition to providing all the options from Advanced DAC in a TVG display for seamless integration of the two sizing techniques, the ADT software now offers a customizable TVG Table option for direct access to TVG point adjustment. This new feature allows fine manual adjustment of any captured TVG points, both for gain and position, as well as manual entry of new TVG points. The TVG Table is also completely compatible with the 1kHz High PRF option on the EPOCH 4 and EPOCH 4 PLUS instruments, as well as the Interface Gate option on those instruments, allowing for specialized fast scanning and on-line inspections previously out of reach of the EPOCH 4 series instruments.

 onboard DGS/AVG

 Spotweld Assistant

Spotweld Assistant (SWA) - The Spotweld Assistant software option is onlyavailable with the EPOCH 4 PLUS flaw detector, and is intended to provide automated weld quality analysis using a combination of the industry-proven Spotweld Overlay functionality with an advanced quality analysis algorithm. This software feature greatly enhances the EPOCH series' capability to inspect and characterize spotwelds with improved efficiency and accuracy.

Ultrasonic inspection of spotwelds involves the analysis of what is known as the "ring-down" of sound energy within the weld nugget. Unlike many direct-measurement techniques, spotweld inspection looks at the characteristics of the multiple echoes returned from sound ringing within the weld nugget to determine the quality of the weld. Echo spacing, sound attenuation, and intermediate echo detection are some of the indicators of weld quality analyzed by trained inspectors. Ultrasonic spotweld inspection is completely based on comparison between known "Good" and "Unweld" conditions with unknown welds, and requires a highly trained operator to perform a comprehensive inspection.

"Good" Weld Reference Condition

The Spotw