frequency measuring equipment [电子] 频率测量设备 ; 频率计 ; 频率测量装置
frequency measuring bridge [电] 测频电桥
frequency measuring station 测频站 ; 频率测试台
sweep-frequency measuring setup 扫频测试仪
acoustic frequency measuring instrument 声频测量仪器
frequency measuring relay 测频继电器
The accuracy of phasor measuring is determined by that of system frequency measuring, and the frequency deviation will give more influence to the phasor computing than to the amplitude of DFT.
2、指出系统频率测量精度是PMU相量测量精度的关键,而且频率测量偏差造成的相位影响远高于幅值影响。
参考来源 - 电力系统“广域同步相量测量”中几个关键问题的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
A model of vortex signal in the state of pulsing flow is studied, and a new frequency measuring technique is proposed.
研究脉动流条件下涡街信号的模型，提出频率测量的新方法。
It introduces a digital cymometer which has the functions of frequency measuring, pulse cycle measuring, pulse width measuring and pulse signal ratio measuring.
介绍了具有频率测量、脉冲周期测量、脉冲宽度测量以及脉冲信号占空比测量等功能的数字频率计。
The filter processes input discrete sampling signal to recover continuous signal and suppress harmonic noise, and the zero-crossing frequency measuring method is improved.
该滤波器通过处理输入离散采样信号获得连续信号并抑制谐波噪声，改进了过零测频方法。
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