摘要
文中根据小波变换的奇异性检测原理，分析了环境温度变化对原子钟特性的影响。基于小波变换的信号重建原理，将温度变化引起原子钟相位-时间起伏进行时-频域分离。用小波变换理论分析了由于昼夜温度变化引起原子钟周期性波动的原因，结合传统的港分析方法，认证了原子钟相位－时间起伏的周期性。结果表明：在有环境温度调节的环境中，氢原子钟的相位－时间起伏标准差41ns左右，在一般环境中，她原子钟的相位一时间起伏标准差21us左右。改善环境条件可以提高原子钟的频率稳定度。
According to singularities detection of the wavelet theory, the atomic clock temperature characteristic is analysed. Based on the signal recons truction principle of the wavelet theory, the atomic clock phase-time variation with temperature is separated. Atomic clock periodicity undulation with the environmental temperature variation during day and night is analysed by the wave1et theory. The periodicity of the atomic phase-time undulation is proved using the wavelet theory and the traditional method. The phase-time undulation standard deviation of the atomic hydrogen maser is 4lns when the environment of the atomic clock is controlled- The phase-time undulation standard deviation of the Cesium atomic clock is 2lns at the normal environmental temperature- The atomic clock frequency stability may be improved when the enevironment of the atomic clock is ameliorated.
关键词
小波分析
相位
时间
周期变化
原子钟
wavelet theory, phase-time, periodicity, environment temperature
