2) track circuit frequency-shift signal
轨道移频信号
1.
The FFT frequency analysis method is usually used in the track circuit frequency-shift signal detection, but for the reason that the detection needs a high resolving power of frequency, the FFT analysis method may affect the authenticity of the spectrum analysis.
轨道移频信号检测技术中多采用FFT的频谱分析方法,但是由于轨道移频信号的检测需要较高的频率分辨率,FFT的分析方法会影响到频谱分析的真实性。
3) single rail track frequency shift signal
单轨条移频信号
4) railway signal
轨道信号
1.
Research on railway signal real time analyzer based on virtual instrumentation;
基于虚拟仪器技术的轨道信号实时分析仪研究
2.
However,railway signal transmission channel is very bad,so the signal will inevitably be mixed with a variety of noise.
而轨道信号传输信道所在环境是非常恶劣的,因此不可避免会混入各种噪声。
5) Track signal
轨道信号
1.
Parameter detecting technology of track signal based on wavelet transform;
基于小波变换的轨道信号参数检测
2.
Because of this, it is necessary to detect the parameters of the track signals precisely and timely, in order to inspect whether the track circuit and .
因此,我们要准确及时地检测轨道信号参数,以判断轨道电路及其信号设备是否处于最佳工作状态,可以及时消除隐患,确保铁路安全行车。
3.
Track signal detection is one of the most important ways to ensure the safety of the train moving.
为了确保铁路线路上的行车安全,及时准确地检测出轨道信号参数是我们亟待解决的问题。
6) Frequency shift signal
移频信号
1.
The realization of frequency shift signal based on railway circuit;
轨道电路移频信号解调实现
2.
Digital realization of frequency shift signal with continuous phase;
相位连续移频信号的数字化实现
3.
The investigation of technical solution based orthogonal frequency shift signal;
基于正交性移频信号技术方案的研究
补充资料：多普勒频移
多普勒频移
物理学术语。又称“多普勒频率”。由多普勒效应引起发射频率与运动目标反射波或散射波信号频率之间的频差。反射体引起的多普勒频移(fd)与发射频率(fs)的关系式为fd=(2Vcosθ)·fs，C为声速，V为反射体的运动速度，θ为反射体运动方向与声束指向之间的夹角。取超声诊断中的典型数据可算得血流。胎心检测中的多普勒频移(fd)均在声频范围之内，因此这类诊断仪器均可采用扬声器来监听。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条