Zn Technologies Co., Ltd.

Ulsan National Institute of Science and Technology

Zn Ocean Co., Ltd.

Chul Gyun Park

Chang Soo Kang

Na Young Kim

Mi Young Kim

Franklin Don Bien

Eun Gyu Bae

Dong Tak Kim

A management system according to the present invention may comprise: a body including an opening/closing door; a first terminal that is located inside the body, measures environment information inside the body, and generates first data on the basis of the measured environment information; a second terminal that is located outside the body, generates second data including state information of the opening/closing door, and generates third data on the basis of the first data and the second data; and a server that generates a signal including risk coefficient information indicating a contamination level inside the body on the basis of the third data, and transmits the signal to a user terminal.

Method and system for managing metal shield space using plurality of terminals

The present invention relates to an interphone device for use in ships, the interphone device comprising: an input/output unit to which a voice is input or from which a voice is output; a transmission/reception circuit unit which receives the voice from the input/output unit and provides a first signal obtained by encoding and modulating the received voice; and an antenna which is attached to the metal hull of the ship, forms an electromagnetic field in the metal hull, and carries the first signal received from the transmission/reception circuit unit by the electromagnetic field, so as to propagate the first signal.

Device and method for intra-ship communication

Growing community of inventors

Seoul, South Korea

Chul Gyun Park