Stanford Acoustic Emission Data set

The acoustic emission (AE) data set is from a triaxial compression test conducted in a triaxial loading vessel equipped with a network of AE sensors . In the compression test, a cylindrical Berea sandstone specimen (diameter: 25.14 mm; length: 49.45 mm) was increasingly loaded up to failure at an axial strain rate of 1.03×10-5 /s under a constant confining pressure of 5 MPa. During the axial loading process, AE waveforms were detected by ten PZT-5A compressional crystal sensors manufactured by Boston Piezo-Optics Inc. The setup uses an Elsys acquisition system to amplify, digitize and record the waveforms, which consists of an AE-Amp Pre-amplifier (model Amp-BU-20-AE) and a High-Speed Data Acquisition (model TranNET EPC) module. We set a 40 dB pre-amplification gain and 5 kHz – 2MHz bandpass filtering. The sampling rate of waveforms was 10 MHz. The time length of each waveform was 250 μs, comprising a pre-trigger length of 50 μs and a post-trigger length of 200 μs. Here, the term “trigger” refers to one channel of the AE system being activated once the acquired waveforms meet a triggering criterion set by the user. We set the trigger level at 0.5 V and the trigger mode to use the positive slope mode. After acquiring the AE data, we manually picked the P-wave arrivals of 49,212 waveforms. We provide the manual picking here. Please contact Tianyang Guo via [e-mail] or Tiziana Vanorio via [e-mail] for the raw data of the waveforms.

声发射（Acoustic Emission，AE）数据集源自一项三轴压缩试验，该试验在搭载声发射传感器阵列的三轴加载舱内开展。本次试验采用圆柱形贝雷砂岩（Berea sandstone）试样，其直径为25.14 mm，长度为49.45 mm；在围压恒定为5 MPa的条件下，以1.03×10^-5 /s的轴向应变速率逐级加载直至试样破坏。轴向加载过程中，采用10支由Boston Piezo-Optics Inc.生产的PZT-5A型压缩晶体传感器采集AE波形。该试验系统采用Elsys采集系统完成波形的放大、数字化与记录，该系统包含AE-Amp前置放大器（型号：Amp-BU-20-AE）与高速数据采集（High-Speed Data Acquisition）模块（型号：TranNET EPC）。本次试验设置的前置放大增益为40 dB，带通滤波范围为5 kHz至2 MHz。波形采样率为10 MHz，单条波形的总时长为250 μs，其中包含50 μs的预触发时长与200 μs的后触发时长。此处的“触发”指当采集到的波形满足用户设定的触发准则时，AE系统的单通道被激活。本次试验将触发电平设置为0.5 V，触发模式设为正斜率触发。完成AE数据采集后，研究人员人工拾取了49212条波形的纵波（P波）初至时刻。请从https://purl.stanford.edu/zq638ms9681下载该波形数据集。

搜集汇总

背景与挑战

背景概述

该数据集是一个声发射（AE）数据集，来自对Berea砂岩样本进行的三轴压缩测试，在5 MPa恒定围压下加载至破坏，使用10个PZT-5A传感器记录波形，采样率为10 MHz，并包含49,212个波形的P波到达手动拾取。数据集由Stanford University的研究人员创建，发布于2025年，适用于声发射分析和岩石力学研究，采用CC BY 4.0许可证开放访问。