【摘要】：高精度時間間隔測量技術對國民經(jīng)濟與國防建設意義重大。論述了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(1 p8)量級的測量精度。該方法利用聲表面波色散延遲線作為時間內(nèi)插器,時間內(nèi)插器起到時間拉伸的作用,從而可以獲得多個測量值,在隨后的處理中,由于互相關運算的平均效果,總的測量誤差將被大大降低。用窄脈沖去激勵聲表面波色散延遲線,輸出響應為線性調(diào)頻信號,通過對兩次激勵的輸出響應作互相關運算,對運算結果的相頻特性作一階擬合,便可以精確地得出這兩次激勵之間的時間間隔。詳細推導了測量誤差的傳播模型,并著重分析了3類主要噪聲產(chǎn)生的測量誤差,進而提出了減小測量誤差的具體措施。
[Abstract]:High precision time interval measurement technology is of great significance to national economy and national defense construction. In this paper, a new high precision time interval measurement method is presented. The single measurement can achieve the accuracy of sub-picosecond (1p8). In this method, saw dispersion delay line is used as time interpolator, and time interpolator plays the role of time stretching, thus multiple measurement values can be obtained. In subsequent processing, due to the average effect of cross-correlation operation, The total measurement error will be greatly reduced. The dispersion delay line of saw is excited by narrow pulse, and the output response is linear frequency modulation signal. The phase frequency characteristic of the operation result is fitted by cross-correlation operation of the output response of two excitations. The time interval between the two stimuli can be accurately obtained. The propagation model of measurement error is deduced in detail, and the measurement error caused by three kinds of main noise is analyzed emphatically, and the concrete measures to reduce the measurement error are put forward.
【作者單位】： 中國科學院上海天文臺;中國科學院研究生院;上海理工大學;
【基金】：國家自然科學基金(11103066)
【分類號】：P128

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本文編號：2215212