Measurement Of Short Time Interval Based On The Time-Space Conversion

The precise measurement of short time interval has an extensive application .Because the short time interval which is asynchronous between the time interval measured and the clock pluses filled exists in the any time measurement. The precise measurement of short time interval is an effective way to improve the accuracy of any time measurement.The present technology of measurement of short time interval does not satisfy the development of technology because of the disadvantage itself. This paper mainly introduces the method of time interval and frequency measurement based on the relationship of time-space。It is an new approach of time interval and frequency measurement, which can be used to measurement short time interval by detecting the phase coincidence point between the signal and its transfer delay with related length。The precision from several ns to 10ps can be easy acquired.The method using the natural phenomenon of stability and precision of signal transfer can guarantee much higher accuracy than other traditional ones being dealt with frequency.The measurement of very high frequency (VHF) is one of the difficulties in frequency measurement. The basic idea behind all VHF measurements is based on the frequency-signal processing. However, most commonly used methods are frequency-mixing or humorous wave frequency-mixing. When using this method, it is hard to obtain humorous wave with frequency high than 10 5. In fact, in this kind of big frequency-ratio measurements, we can also adopt the scheme of time processing (i.e. phase-error relation), except to frequency-processing methods. Compared to using frequency method directly, we can achieve even higher accuracy by transforming the frequency into time before processing.