1) intermittent frequency shift signal
点式移频信号
2) 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
3) frequency-shift signal
移频信号
1.
The realization of testing the frequency-shift signal of UM71 track circuit;
UM71轨道电路移频信号测试系统的实现
2.
The accuracy is not very high when time domain analysis method is used to process track circuit frequency-shift signal for the FSK auto-block system.
针对当前移频自动闭塞系统采用时域分析方法处理轨道电路移频信号显示出准确率不高等问题,引入小波变换的Mallat算法,借助Matlab,通过对实际信号的数字处理,得到用coif5小波基6层分解和相应阈值可以有效地分析和判断轨道移频信号的结论。
3.
Moreover,imitating the train running in the sections,controlling the low frequency and the carry frequency by computer could be implemented by the software,and this System could also imitate the cab signal ground signal,gather the Frequency-Shift Signal,display some kinds of informati.
系统具有区间列车模拟运行,可以实现计算机对低频、载频的控制,地面信号、车载信号模拟,区间移频信号的采集,模拟示波器显示各种信息以及对移频信号作频谱分析等。
4) FSK signal
移频信号
1.
According to the characteristics of the wayside frequency-shift signal spectrum,and based on a great number of computer emulators and real-time experiments and on non-complete periods sampling,the feasibility of applying the under-sampling technology to the real-time FFT analytical method of tramroad FSK signal is validated.
针对轨道移频信号的频谱特点,采用欠采样技术对轨道移频信号进行非整周期的采样,经过计算机仿真实验,验证了基于非整周期采样方法对轨道移频信号进行实时傅里叶变换(FFT)分析检测的可行性,证明采样方法满足检测指标的要求。
2.
After analyzing the spectrum of the FSK signal and finding the feasibility to apply band pass sampling technology,a new real time detection for FSK signal based on non whole period sampling is put forward,and the frequency resolution and the character of real time are also studied.
对铁路轨道移频信号的频谱进行了分析 ,针对其频谱特点发现了应用带通采样技术的可行性 ,提出了基于带通采样频率的非整周期采样的实时检测方法 ,同时对其频率分辨率和实时性进行了研
3.
The article analyzes the property of FSK signal and the intense interference surroundings of railway operation.
随着我国电气化铁路的不断普及,移频信号的准确、实时检测对于列车的安全行驶起着至关重要的作用。
5) frequency shifting signal
频移信号
1.
The frequency shifting signal of the dropping ball in slurry is received via ultrasonic.
利用超声多普勒效应接收液体中下落小球的频移信号 ,将此信号送微机进行采集、比较、判断、计算并显示出泥浆粘度。
2.
The frequency shifting signal of a dropping ball in the liquid is received via ultrasound.
它将超声技术与计算机技术相结合 ,利用超声多普勒效应接收液体中下落小球的频移信号 ,将此信号送微机进行采集、比较、判断、计算并显示出粘滞系数 。
6) FSK
移频信号
1.
A New Demodulation Method for FSK Signal;
一种轨道移频信号解调的新方法
2.
System Design of Track FSK Signal Based on Time-Frequency Distribution;
基于时频分析技术轨道移频信号接收系统设计
补充资料：闭式单点、双点压力机
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主要参数内容 | 国际先进 | 国内先进 | 国内一般 | 国内落后 | 评定方法及说明 | ||
（一）加工精度 | 参照GB10924-89、GB10933-89、JB5200-91 | ||||||
1、滑块下平面对工作台上平面的平行度（mm） | 30%精度储备 | 20%精度储备 | 达到规定值 | 大于规定值 | |||
0.02+0.10/100×滑块下平面的被测长度 | |||||||
2、滑块行程对工作台上平面的垂直度 | 30%精度储备 | 20%精度储备 | 达到规定值 | 大于规定值 | |||
0.05+0.02/100×滑块行程长度 | |||||||
（二）结构性能 | |||||||
1、离合器、制动器接通率，当滑块行程次数≤16次/分时为70%，≤25次/分时为60%，≤45次/分时为50% | 大于规定值10% | 大于规定值 | 达到规定值 | 达不到规定值 | |||
2、液压超负荷保险装置、微调装置、吨位指示器 | 全部具有 | 全部具有 | 部分具有 | 没有 | |||
（三）噪声dB（A） | |||||||
1、公称力≤400kN | ≤85 | ≤87 | ≤88 | ＞88 | |||
2、公称力＞400kN | ≤87 | ≤88 | ≤90 | ＞90 | |||
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