设计了一种新的软硬件相结合的方法去检测反电动势过零点。
Firstly, a new zero-crossing detection method with software comparing with hardware is designed.
在阈值计算过程中，还用到一种基于过零点边缘检测技术的边缘追踪算法。
A new edge tracking algorithm based on zero-crossing edge detection technique is applied in the process of threshold computing.
文章作者研究开发的过零点电压比较法（ZCPV法）已能够满足这一要求。
The zero cross point voltage comparing method (ZCPV method) developed by the authors can meet the above mentioned requirements.
由于直流熄弧电流不存在自然的过零点，因此必须强制过零才能熄灭直流电弧。
Due to DC arc extinguishing current has no natural zero-crossing point, so, DC arc can only been extinguished by forced zero-crossing-over.
介绍了两个可以用于多信号测电子科技大学博士论文频的技术：频率信道化和过零点谱分析。
Two technologies, spectral channelization and spectral analysis with zero crossing that could be both applied to multi-signals, are also introduced.
在构建协方差矩阵时，时窗的选取是一个很重要的因素，本文给出了道自相关法和过零点法。
When founding the covariance matrix, the choosing of the time window is very important, and this article introduce two ways to choose the time window, the autocorrelation and passing zero point.
提出的过零点检测算法，较好解决了脉搏信号时域特征点参数多，分析复杂，误差较大的问题。
The algorithm of measuring zero-crossings can better solve the problems that the characteristic parameters of the pulse signal are complicated in the time field and the measuration errors are greater.
分析了正常人脉搏信号的小波域特征，发现脉搏信号的时域特点严格对应于其小波变换的过零点。
The zero-crossing of the wavelet transform of the normal personpulse-wave is found out as a fact that its wavelet transform coefficientscorrespond strictly to its time field characteristic.
分析了正常的人脉搏信号的小波域特征，发现脉搏信号的时域特点严格对应于其小波变换的过零点。
The zero-crossing of the wavelet transform of the normal person pulse-wave is found out as a fact that its the wavelet transform coefficients correspond strictly to its time field characteristic.
本文采用反电动法控制永磁直流无刷电机，是通过检测反电动势过零点获得转子位置实现无传感器控制。
Using Back-EMF method to control BLDCM, it can realize sensor-free control method by detecting the zero point of EMF in this paper.
它具有机构简单、变量准确、能够过零点操作以及响应速度快的特点，适用于运输车辆及工程机械等场合。
It features simple and accurate displacement variation, ability in cross-zero operation and fast response and is suitable for transportation vehicles and construction machinery applications.
本文采用虚拟中点的方法来识别反电势过零点，然后对过零点进行处理得到无刷电机换向的六个关键位置。
This paper USES "virtual neutral point method" to measure the "zero crossing", then the soft deal "zero crossing" to get the six key position to commutate.
针对地震反演预处理的地震降噪问题，本文结合小波分析设计了一种过零点滤波器，对多分量地震资料进行了面波剔除研究。
In the denoising and preprocessing for seismic inversion, a zero-crossing filter is developed based on wavelet analysis to remove surface waves from the multi-component seismic data.
该方法以电网电压为同步信号，在电网电压信号的过零点采样直流侧电容电压，并通过周期离散控制可以获得负荷电流有功分量。
The new control way can realize linear control for DC-bus voltage and get the fundamental component of the load current synchronously with a little of calculation.
通过试验发现，磁记忆检测信号与构件的损伤状态之间具有明显的相关性，通过检测法向磁场的过零点可以实现对构件早期损伤的检测。
It is found that the MMM signal has apparent relationship with the damage, and that by the zero value of the MMM signal, the hidden damage in the ferromagnetic component can be detected.
因此提出了一种改进的过零检测算法：零点斜率测频法。
An improved method which measures frequency through the slope of zero based on the cross-zero detecting is presented.
因此提出了一种改进的过零检测算法：零点斜率测频法。
An improved method which measures frequency through the slope of zero based on the cross-zero detecting is presented.
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