Land marking method and land making system of pipe interior detector

The invention discloses a land marking method of a pipe interior detector, which comprises the following steps: synchronizing the clock of the pipe interior detector and the clocks of land marks; detecting the pipe mark position at which a land marker is arranged in real time by using a seismic detector and converting a vibration signal when vibration occurs and outputting an analog voltage signal; converting the voltage signal into a digital signal by using an analog-to-digital converter and sending the digital signal to a digital signal processor; judging if the vibration signal is an validsignal generated when the pipe interior detector passes by and recording the signal and receiving the clock value of the signal when the signal is the valid signal; and acquiring and correcting the error between the position of the land marker and the position detected by the pipe interior detector at the moment according to the vibration signal and the clock of the received signal. The inventionalso discloses a land maki