A FPGA-PC Based Acoustic Emission System with Logarithmic Preamplifier for Fracture Monitoring

被引：0

作者：

Vondra, Marek ^{[1
]}

Csefalvay, Gabriel ^{[1
]}

Sedlak, Petr ^{[1
]}

机构：

[1] Brno Univ Technol, Fac Elect Engn & Commun, Dept Phys, CS-61090 Brno, Czech Republic

来源：

MATERIALS STRUCTURE & MICROMECHANICS OF FRACTURE VII | 2014年 / 592-593卷

关键词：

Acoustic emission; FPGA; Field Programmable Gate Array; logarithmic preamplifier;

D O I：

10.4028/www.scientific.net/KEM.592-593.551

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

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 AJD 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.

引用

页码：541 / 544

页数：4

共 4 条

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