中文摘要：

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．

英文摘要：

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.