To detect flaw echoes that are as small as possible, the highest available dynamic range and vertical resolution are required. This sampling rate provides 10 points per signal cycle, which allows excellent echo timing resolution. The system incorporates ultrasonic transducers with center frequencies of up to 10 MHz and samples ultrasonic signals at 100 MS/s. The ultrasonic echo trains of interest then occur over a period of up to 100 �s.Īn embedded digitizer is used to capture ultrasonic signals from the transducer electronics. A programmable delay gate is used to create a TTL pulse that occurs 700 �s after the ultrasonic excitation. In this way, ultrasonic inspection automatically is performed only at the target position.Īfter excitation of the transducer, the relevant ultrasonic echo trains take about 700 �s to return since the ultrasound must traverse a meter-long water path. This pulse is used to trigger the ultrasonic pulser/receiver to emit an excitation pulse. The controller produces a TTL pulse at the instant when it has stabilized at its target position. The position controller is equipped with a pulse on position output, a standard feature on many position controllers used in ultrasonics. While the transducer is translating along the fast axis, the positioning system continuously displaces the transducer in a step-like fashion at a regular rate of about 1 step/ms. The arm scans through a 500 mm � 500 mm rectangular mesh in a back-and-forth, raster-like pattern so there is a fast and an orthogonal slow axis. Excited by an ultrasonic pulser/receiver unit, the transducer emits a wideband burst of ultrasonic energy and receives echoes reflected from the part.īetween successive ultrasonic record acquisitions, a robotic positioning arm controlled through a GPIB connection laterally displaces the transducer in 0.1-mm steps. The transducer, operating in the reflection mode, generates and detects ultrasound. A commercial broadband ultrasonic transducer is robotically positioned in front of a part under test, with both the transducer and part immersed in a water tank. But to survive in today�s competitive market, a modernized PC-based system that provided higher performance at a lower cost was needed, one that capitalized on the benefits of high-speed digitizers.īefore discussing the role of today�s digitizers in fault detection, let�s begin with an overview of the system. On the whole, Engauge Digitizer seems to be a proper means of dealing with diagrams and graphs that have to be converted to simple numbers.Small, fast ultrasound reflections require both high-speed and high-resolution digitizing as well as sufficiently deep memory to hold all the data.Ī company that manufactures ultrasonic flaw-detection systems used for nondestructive testing of laminar steel parts had been performing all measurements using analog circuitry. A useful utility for processing graphs, diagrams and other statistical visual objects The curve geometry can also be customized from a dedicated area where you can specify the units and other elements of the chart you have loaded. There are several digitizing tools you can use, more precisely those for curve points, segment fill, point match or point measurement. This can be done by selecting 'Original Image' and 'Processed Image' from the 'View' menu of the application. Nonetheless, there is a way to peek at both, one after another. Use the digitize tools to edit the graphĪ preview of the source image compared to the currently edited one is, unfortunately, not available. If you care for a more comprehensive perspective, you can opt for having all of the previously mentioned types exhibited. Thus, you can have on display only the axes points, the scale bar, curve or measure points. The level of details, insofar as the shown information is concerned, can be adjusted by selecting the points that are shown and the geometry. The images you have to process can be easily loaded and scaled to the desired dimension in order to analyze up close each plotted element included in the diagram. Through a simple and well-organized interface you are able to access all the functions that this program makes available for editing and transforming various kinds of data. Intuitive UI that includes suggestions and tips Adjusting charts, diagrams and statistics for presentations or inclusion in a business project that has to comply with certain structure and quality standards is not an easy job.įortunately, you can relief the load with the help of Engauge Digitizer, a handy conversion tool designed for processing for a variety of graphical elements that have to be translated into cold numbers.
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