天文学进展
天文學進展
천문학진전
PROGRESS IN ASTRONOMY
2015年
2期
259-266
,共8页
陈文星%卜朝晖%周明翔%穆磊
陳文星%蔔朝暉%週明翔%穆磊
진문성%복조휘%주명상%목뢰
时间间隔%时间内插%声表面波%系统误差
時間間隔%時間內插%聲錶麵波%繫統誤差
시간간격%시간내삽%성표면파%계통오차
time interval%time interpolation signal%surface acoustic wave filter%determin-istic error
提出了一种新的高精度时间间隔测量方法,单次测量可以达到亚皮秒(rms<1 ps)量级测量精度。简单介绍了这种基于声表面波技术的高精度时间间隔测量方法原理与系统组成,阐述了影响系统测量精度的主要因素,分为系统误差和随机误差。针对系统误差进行详细分析,给出其对测量精度的影响范围。通过理论分析,得到决定系统误差大小的重要参数,从而合理设计参数来降低系统误差对测量精度的影响。
提齣瞭一種新的高精度時間間隔測量方法,單次測量可以達到亞皮秒(rms<1 ps)量級測量精度。簡單介紹瞭這種基于聲錶麵波技術的高精度時間間隔測量方法原理與繫統組成,闡述瞭影響繫統測量精度的主要因素,分為繫統誤差和隨機誤差。針對繫統誤差進行詳細分析,給齣其對測量精度的影響範圍。通過理論分析,得到決定繫統誤差大小的重要參數,從而閤理設計參數來降低繫統誤差對測量精度的影響。
제출료일충신적고정도시간간격측량방법,단차측량가이체도아피초(rms<1 ps)량급측량정도。간단개소료저충기우성표면파기술적고정도시간간격측량방법원리여계통조성,천술료영향계통측량정도적주요인소,분위계통오차화수궤오차。침대계통오차진행상세분석,급출기대측량정도적영향범위。통과이론분석,득도결정계통오차대소적중요삼수,종이합리설계삼수래강저계통오차대측량정도적영향。
The paper deals with a novel high-precision time interval measurement method, in which a single measurement can reach subpicosecond (rms<1 ps) precision. It introduces the principle and the realization of the high precision time interval measurement method based on SAW filter excitation. The method is based on the fact that two SAW filters excited by two short pulses can generate well-defined finite signals with highly suppressed spectra outside a narrow frequency band. If the responses to two excitations are sampled at clock ticks, they can be precisely reconstructed from a finite number of samples and then compared so as to determine the time interval between the two excitations. The main reasons for the measurement uncertainty of this method are the deterministic error and the random error. The deterministic error propagation model for the measurement method is deduced in detail. The time-interpolation error caused by deterministic effects has been analyzed in the paper. It has been shown that the mean square of the interpolation error is limited by the upper bound which is proportional to the relative energy of aliasing distortion and inversely proportional to the square of the filter center frequency.