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- W1627424618 abstract "The presentation will concentrate principally on high speed PC based analog-to-digital (A/D) conversion techniques for ultrasonic applications. First, the necessity for A/D of raw ultrasonic signals is outlined stressing what A/D brings to ultrasonic testing over traditional analog signal processing techniques. Subsequently, the need for a high sampling speed is demonstrated and instruction is given on how to estimate sampling rate requirements for a given ultrasonic application. The importance of a high dynamic A/D range is stressed, particularly for pulse-echo systems, and 8-bit A/D is compared with 12-bit A/D. Ultrasonic trigger and sampling clock synchronicity is defined and illustrated with presentation of data from asynchronous and synchronous systems. The frequent requirement of ultrasonic systems to capture signals that occur at a high repetition rate is addressed and various methods of handling high rates are discussed. The advantages of using a waveform generator to arbitrarily excite an ultrasonic transducer are briefly outlined. Finally, several examples of high performance A/D systems in demanding real world ultrasonic applications will be given in order to illustrate the principles discussed." @default.
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- W1627424618 date "2000-01-01" @default.
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- W1627424618 title "High speed PC-based data acquisition in ultrasonics" @default.
- W1627424618 doi "https://doi.org/10.1063/1.1307560" @default.
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