| Autor: |
Gabriel Cséfalvay, Petr Sedlak, Marek Vondra |
| Rok vydání: |
2013 |
| Předmět: |
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| Zdroj: |
Key Engineering Materials. :541-544 |
| ISSN: |
1662-9795 |
| Popis: |
Acoustic emission (AE) is one of the most used nondestructive technique since it offers a great potential due to its ability of quantitative evaluation such as source location and source characterization. A common set of recorded acoustic emission signals has an extraordinarily wide dynamic range. Thus, the input gain of the A/D converter plays a key role due in information loss considering limitation of high signal amplitudes and domination of quantization noise at low levels. The usage of a logarithmic preamplifier extends the dynamic range of conventional A/D converters, thus increases the accuracy and signal-to-noise ratio of weak acoustic emission signals. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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