Harbin Engineering University

Oingdao Innovation and Development Center of Harbin Engineering University

Qingdao Innovation and Development Center of Harbin Engineering University

Zedong Ma

Xin Wang

Liang Zhang

Junjie Li

Yongyao Chen

A navigation-communication-integrated metamaterial sonar for underwater vehicles is provided, and belongs to the field of ocean detection and communication. The metamaterial sonar is a metamaterial composite structure including a group of disc array with the same diameters, a disc backboard and water gaps. By adjusting the period p of the disc array, a board thickness t1 of each disc, the thickness g of each water gap, the radius wof the disc array, the radius wand the thickness tof the backboard, the working states of underwater navigation and underwater acoustic communication may be flexibly switched by changing working frequencies, and the navigation-communication-integrated sonar may be realized.

Navigation-communication-integrated metamaterial sonar for underwater vehicles

Provided is a swim bladder bionic amphibious optical fiber ocean acoustic sensor, belonging to the field of optical fiber ocean sensors, consisting of a sound sensitive diaphragm, a diaphragm supporting shell, a section of coated optical fiber, a single-hole optical fiber sleeve and a single-mode optical fiber. An upper surface of the supporting shell is provided with two symmetrical overflow holes, and a structure includes a back cavity communicated with the overflow holes. A medium in the back cavity of the sensor may be replaced by inflating, deflating and filling water through the overflow holes, to achieve impedance matching with external environments. When the back cavity is inflated, the sensor serves as a fiber-optic microphone, and when the back cavity is deflated and filled with water, the sensor serves as a fiber-optic hydrophone. The working states could be switched flexibly to achieve a working mode like a swim bladder.

Swim bladder bionic amphibious optical fiber ocean acoustic sensor

Growing community of inventors

Harbin, China

Zedong Ma