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1·Firstly, a new zero-crossing detection method with software comparing with hardware is designed.

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。

2·One kind of sensorless control system for brushless DC motor based on DSP was introduced and the principle of back-EMF zero-crossing detection and realization method was discussed in detail.

介绍了反电动势过零位置检测的原理及实现方法，并采用了数字式转速、电流双闭环控制。

3·LFMCW radar nonlinear residual frequency errors zero crossing detection periodogram.

标签LFMCW雷达非线性剩余频差过零检测周期图。

4·A new edge tracking algorithm based on zero-crossing edge detection technique is applied in the process of threshold computing.

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。

5·The principle of the pitch detection and to increase the accuracy of pitch detection by using Zero-crossing, detection. signal sep…

文章还对其基频检测机理和采用“过零检测，信号分离”技术提高基频量测精度作了较详细的论述。