The envelope method of signal based on the Morlet wavelet as well as the relativity methods based on the curve of Gauss function and energy is used to analyze and calculate that the simulative exploration system of tiny terrain incepting the returning echo of ultrasonic

and the spacial position of echo headstream can be attained accurately.By means of validating on the lab

the simulative exploration system is all higher than the traditional single-beam multi-transducer exploration system on the sides of precision

reliability and efficiency etc.