Time-domain measurement method and time-domain measurement device for soil moisture on basis of wireless underground sensor network

The invention discloses a time-domain measurement method and a time-domain measurement device for soil moisture on the basis of a wireless underground sensor network. The method includes that soil moisture content information is obtained by means of measuring propagation time of electromagnetic signals among a plurality of wireless underground node pairs at fixed distances. The device comprises the wireless underground node pairs arranged in soil, each wireless underground node consists of a power supply unit, a processor unit, a wireless module, an antenna and a timing unit, each power supply unit is respectively connected with the corresponding processor unit, the corresponding wireless module and the corresponding timing unit, each processor unit is respectively connected with the corresponding wireless module and the corresponding timing unit, each antenna is connected with the corresponding wireless module, and each timing unit is respectively connected with the corresponding processor unit and the corresponding wireless module. The time-domain measurement method and the time-domain measurement device have the advantages that soil moisture sensors are omitted, soil moisture content measurement cost is greatly lowered, and the wireless underground sensor network is low in power consumption, small in size and good in safety and concealment.