Pulse time interval measuring device

A pulse time interval measuring device comprises a frequency scale signal generator, a pulse transmitter, a pulse receiver, a moment sampler and a signal processor. The moment sampler is connected with the frequency scale signal generator, the pulse transmitter, the pulse receiver and the signal processor. The pulse transmission cycle of the pulse transmitter is set to be a non-integer multiple of the cycle of a frequency scale signal, the pulse cycle serves as a trigger signal of the moment sampler, the moment sampler samples amplitude values of a frequency scale sine wave signal at the pulse transmission moment and pulse receiving moment, the signal processor calculates the phase difference according to the amplitude values of the signal sampled by the moment sampler, and therefore a pulse time interval is obtained. The pulse time interval measuring device is simple in structure, low in cost, convenient and reliable to use, and capable of being used for high-precision pulse time interval measurement of meas