Research On Digital Scheme In Time-frequency Measurement And Control

Along with the development of aviation, positioning, space techniques, metrology, precise time and frequency control, and frequency standard technique, the higher measurement precision is necessary. Using the time process, a higher precise can be reached, and ultrahigh resolution of perplexing frequency will be obtained.A detailed frequency mixing analyse process of two comparison signals is given. Utilizing the time-space relationship and the rule of phase difference, a truer difference period is gained. Quantified error is effectively reduced than ever before, the measurement distinguish is utterly improves. Experiments validate the accuracy and the feasibility of the method.Based on the ultrahigh precision of optical measurement, the form of ultra-short light pulse is discussed. The use of the integral character of photoelectron develops a new space for frequency measurement than the ordinary circuit and electro-signal could. It takes a marked sense on the development of frequency standard, especially for the comparison and process between steady frequency signals.