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随着多频道通信、遥控、遥测以及空间科学技术的不断进展,对于周期性交变频率和时间单位的准确性、精密性和稳定性的要求日益提高,为此对于交变频率或时间间隙的高精度测量就具有重要的意义.沿用已久的李沙育图象(或轮型图象)同步拍频方式,在目前条件下仍然是拍测频率方法中精度最高的一种,因为它对频率的合拍或失拍非常敏感,并且在一定的条件
With the continuous development of multi-channel communication, remote control, telemetry and space science and technology, the requirements for the accuracy, precision and stability of periodic alternating frequency and time units are increasing day by day. For this reason, the high alternating frequency or time gap Accuracy measurement is of great importance. The well-established synchronization of Lissajous images (or wheel images) is still the most accurate method of measuring frequency under the present conditions because of its in-phase Or lost film is very sensitive, and under certain conditions