| 1. | Standard frequency and time signal - satellite service
卫星标准频时信号业务 |
| 2. | Brief introduction of the international standard frequency test card
国际标准视频测试卡简介 |
| 3. | Standard frequencies for centralized network control installations
集中网络控制装置的标准频率 |
| 4. | Guide for measurement of environmental sensitivities of standard frequency
标准频率环境敏感度测量指南 |
| 5. | I e c standard frequencies
Iec标准频率 |
| 6. | Guide for measurement of environmental sensitivities of standard frequency generators
测量标准频率发生器对环境灵敏度用指南 |
| 7. | Testing of insulating materials ; determination of dielectric properties ; testing at standard frequencies of 50 hz , 1 khz , 1 mhz
绝缘材料的检验.介电性能的测定.在标准频率50hz 1kh |
| 8. | In the second chapter , equivalent circuit of the eddy current sensor is firstly analyzed . based on that , the carrier signal generating circuit that is realized by the lc periodic circuit is introduced , thus , the carrier signal of standard frequency is obtained through the trimming capacity . subsequently , the disc type rotational armature generator and the rotational coupling transformer are separately leaded in to realize the power supplies of the carrier signal generating circuit and output of the measuring signal
在传感器设计一章中，首先对涡流传感器进行等效电路分析，在此基础上分析了由电感、电容谐振电路构成的载波信号发生电路，并通过微调电容获得了标准频率的载波信号；接下来提出了采用盘式旋转电枢发电机解决载波信号发生电路电源供给问题的方案，同时通过旋转耦合变压器的引入，使得测量信号输出问题很好地解决；本章最后给出的一组实验曲线充分说明了这一方案的可实现性。 |
