Submarine intelligent includes underwater acoustic communication,One of the technical difficulties to overcome the intelligent for submarine pipeline maintenance is how to realize the underwater communication system of the intelligent to complete the remote operation of the platform. Due to the par

1)Research status of high temperature piezoelectric ceramic materials: SiO2 is one of the earliest piezoelectric materials applied to devices. Due to its stable resonant frequency and good temperature stability, it is widely used in production control and management of all communication system. In c