模糊区特性下高精度频率测量技术

doi:10.3969/j.issn.1001-2400.2017.04.014

西安电子科技大学学报

模糊区特性下高精度频率测量技术

贾兆旻1,2,3;李智奇4;周渭4;杨旭海1,2;孙保琪1,2;苗苗4;董绍锋4

(1. 中国科学院国家授时中心，陕西西安 710600；
2. 中国科学院大学，北京 100049;
3. 唐山学院智能与信息工程学院，河北唐山 063020;
4. 西安电子科技大学机电工程学院，陕西西安 710071)

收稿日期:2016-07-30 出版日期:2017-08-20 发布日期:2017-09-29
作者简介:贾兆旻(1982-)，男，中国科学院博士研究生，E-mail: 375247025@qq.com
基金资助:
国家自然科学基金资助项目(61201288, 11403017, 11503019, 11173026)

High precision frequency measurement based on the characteristic of the fuzzy area

JIA Zhaomin1,2,3;LI Zhiqi4;ZHOU Wei4;YANG Xuhai1,2;SUN Baoqi1,2;MIAO Miao4;DONG Shaofeng4

(1. National Time Service Centre, Chinese Academy of Sciences, Xi 'an 710600, China;
2. Univ. of Chinese Academy of Sciences, Beijing 100049, China;
3. Intelligence and Information Engineering College, Tangshan Univ., Tangshan 063020, China;
4. School of Mechano-electronic Engineering, Xidian Univ., Xi'an 710071, China)

Received:2016-07-30 Online:2017-08-20 Published:2017-09-29

摘要/Abstract

摘要：

在测量器件分辨率有限的情况下，离散式模糊区的相位差变化是随机的，无法被稳定地捕捉到，测量值精度只能达到纳秒量级．而集中式模糊区的相位差变化是步进式的，器件可以稳定地捕捉到皮秒量级的变化．采用转换测量模糊区形式的技术，提出了一种高精度频率测量方法．该方法通过计算机控制与频率合成，把离散式模糊区转换成集中式模糊区，再利用集中式模糊区边沿处变化值具有皮秒量级的稳定特性进行频率测量．结果表明，所提出的方法使测量精度提高了2到3 个数量级，实现了宽频率范围的高精度测量．

关键词: 频率测量, 相位差变化, 测量分辨率, 模糊区

Abstract:

The phase difference change is random in the discrete fuzzy area by considering the limit of device resolution, which the device can not stably capture, and the precision of the measured value only reaches the level of ns, but the phase difference change in the concentrated fuzzy area is step by step, and the device can stably capture the change of ps. By using the fuzzy area conversion technology, a high precision frequency measurement is designed. Through computer control and frequency synthesis,the discrete fuzzy area is converted to the concentrated fuzzy area, the ps stability properties of phase difference change on the border of the concentrated fuzzy area is used, the precision can be improved two or three orders of magnitude, and the high precision measurement in a wide range is achieved.

Key words: frequency measurement, phase difference change, measurement resolution, fuzzy area

贾兆旻;李智奇;周渭;杨旭海;孙保琪;苗苗;董绍锋. 模糊区特性下高精度频率测量技术[J]. 西安电子科技大学学报, 2017, 44(4): 75-79.

JIA Zhaomin;LI Zhiqi;ZHOU Wei;YANG Xuhai;SUN Baoqi;MIAO Miao;DONG Shaofeng. High precision frequency measurement based on the characteristic of the fuzzy area[J]. Journal of Xidian University, 2017, 44(4): 75-79.

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模糊区特性下高精度频率测量技术

High precision frequency measurement based on the characteristic of the fuzzy area

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