对侧刺激声作用下瞬态诱发耳声发射信号的相位研究。
Phase Variation Analysis of Transient Evoked Otoacoustic Emission Signal with or without Contralateral acoustic Stimulation.
在高水平时，由于岩石内部损伤程度高，有零星声发射信号产生。
Meanwhile, sporadic acoustic emission signals are detected in the high stress stage for the high extent of internal damage.
结果表明：岩石压入硬度与声发射信号的积分rms有最好的相关关系。
It is indicated that there is the best correlation between rock indentation hardness and integrated RMS of AE events.
小波分析具有很强的弱信号的检测能力，适用于提取声发射信号的故障特征。
It is pointed that wavelet analysis has a powerful ability for weak signal detection, which is suitable for withdrawing fault diagnosis of acoustic emission (AE) signals well.
结果表明，在不同的声发射信号参量特征与不同的损伤机理之间存在对应关系。
The results showed that the relationship between AE signal parameters and damage mechanisms can be established.
本课题的目是探讨起重机梁声发射技术无损检测的可行性及声发射信号的特征。
The aim of this subject is to discover the feasibility of crane beam AET NDT and the characteristic of AE signal, which has never been reported in literature until today.
文章根据污秽放电伴随的超声信号，提出用声发射信号来反映绝缘子的污闪过程。
In this paper, the method which can judge the working condition of the insulator based on the acoustic emission is given (AE method).
通过采集这种声发射信号并分析处理，建立了检测锅炉“四管”泄漏的检测系统。
Meanwhile, through acquisition, analysis and processing to the sort of acoustic emission signals, the testing system for the leakage of "four tubes" of boiler will be set up.
而在峰值载荷附近，声发射事件数快速增长且开始有大量高振幅声发射信号出现。
As the load reached the peak, a large number of AE hits occurred and its amplitude was high.
摘要：在实验室的条件下模拟压力管道裂纹微泄漏源的声发射信号处理与泄漏源定位。
Abstract: the simulation of acoustic emission signal processing of pressure pipeline crack micro leakage with the localization of the leaking source was carried out under the laboratory condition.
根据管道泄漏时产生声发射信号的现象，构建了一种管道泄漏与泄漏点定位的检测系统。
According to the phenomenon of sonic transmission caused by pipeline leakage a detecting system of pipeline leakage and the location of the leakage point is structured.
但是，声发射信号的起始点并不是主裂纹起裂点，失稳前阶段也不能与亚临界扩展阶段等同。
But the beginning of the acoustic emission sign is not the cracking point of main crack, and the preinstability stage may not be equal to the subcritical growth stage.
由于各种噪声的影响，以及声发射信号传播过程的复杂性，又给声源的识别带来一定的困难。
Because of the noise and complex of AE signal transmission characteristic, the recognition of AE source is very difficult.
信号采集处理模块采集声发射信号，对其进行调理、AD转换成计算机可以处理的数字信号。
Signal collection handling modular collection AE signal, optimizing it, the AD Converter changing AE signal to the digital signal.
分级加载时，当应力增加时声发射信号明显增多，应力稳定在低水平时基本不产生声发射信号；
During multi-stage loading process, acoustic emission signals increase obviously when the stress increases, and few acoustic emission signals are detected in the low stress stage.
最后通过对能反映源特征的频带信号进行重构，这样能更好更有效的提取声发射信号的本质特征。
At last, we recomposed some frequency band of wavelets, and the results can efficiently extract the features of acoustic emission signal.
建立了工程陶瓷高速深磨中声发射的实验系统，自主开发了其中的声发射信号虚拟仪器采集系统。
An acoustic emission (AE) test rig with signal acquisition virtual instrument system has been developed for engineering ceramics high speed deep grinding.
结果表明： 对称位置接收到的声发射信号的相位差和幅值差可以作为电弧超声焊缝跟踪的依据。
The results show that the phase difference and the amplitude variation can be considered as the criteria of seam tracing.
岩石是典型的非均匀脆性材料，其内部富含各种缺陷，在受载破裂过程中会产生大量的声发射信号。
Rocks were typical inhomogeneous brittle materials with abundant various deficiencies inside and will generate plenty of acoustic emission signals during damage process under loading.
定义了基于振动分析的声发射信号特征参数，研究了各特征参数随转速、载荷和损伤类型的变化规律。
The characteristic parameters of AE which were defined based on vibration analysis under varying load, rotating speed and damage type were also studied.
冬季的侧柏切片，其超声发射信号量和持续时间均比夏季的少，幅度、振铃计数和上升时间差别不大。
The amount of signals and duration were smaller than in summer, and amplitude, rise-time, ringing counts were not very different.
研究结果表明，采用神经网络可以有效预测电磁辐射和声发射信号，为判定煤岩变形破裂状态提供依据。
The results show that ANN can be used to effectively predict the electromagnetic radiation and acoustic emission signals so as to provide reliable data for judging the state of coal and rock failure.
根据这一规律，通过计算声发射信号曲线的赫斯特指数(或分形维数)，便可确定声发射试验中的凯塞点。
On the basis of this character of Hurst index, the Kaiser point can be determined correctly by calculating the Hurst index of AE signal curve.
用声发射监测带有不同深度缺口的Q2 35钢试样的拉伸试验，由声发射信号分析判断缺口发生破坏的情况。
The tensile test of Q235 steel samples with notches of different depths and their damages were monitored by acoustic emission technique.
利用超声发射信号模型，并使用d - S证据理论对环境地图进行更新，从而实现了基于超声的栅格地图创建。
In order to realize the map building based on ultrasonic, a transmitting signal model is established and the D-S theory is used for updating the environment map.
采用B - P型反向传播神经网络构成的智能化模式分类器，对此五类声发射信号进行识别，获得了满意的效果。
An intelligent pattern classifier with B-P neural network is used in recognition of those five kinds of AE signals successfully.
对受激电弧的声发射信号分析表明，从音频到超声频带，电弧声发射与激励频率之间存在着线性响应和非线性响应特征。
The characteristic of linear and nonlinear responses between arc excited ultrasonic emission and excited frequency was realized by the received signal from the acoustic to the ultrasonic spectrum.
由于泄漏声发射信号的多模态特性和在管道内传播过程中的频散特性，使得通过相关分析进行管道泄漏定位的效果很差。
Due to the multi modes and dispersion nature of acoustic emission (AE) propagating in pipeline, traditional cross correlation technique do not perform well for acoustic leak location.
通过研究点蚀过程中腐蚀损伤程度及腐蚀声发射信号随腐蚀时间的变化规律，获得了腐蚀损伤与声发射参数之间的变化关系。
By studying change disciplinarian of corrosion degree and AE signal with corrosion time, change relation between corrosion degree and AE parameter has been achieved.
在声发射信号的处理中使用了时频分析工具—小波包，将信号在不同尺度上分解，以便确定信号在奇异点处的时频特征信息。
In processing the AE signal, the analysis tool of time and frequency-wavelet package is adopted, in order to confirm the characteristics of time and frequency in strange points of the signal.
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