SELF-RECORDING HYDROPHONE, MEASUREMENT SYSTEM AND METHOD OF SHIP'S UNDERWATER RADIATED NOISE USING SELF-RECORDING HYDROPHONES

摘要

A self-recording hydrophone is disclosed. The present invention is to measure underwater noise and to automatically record the measured underwater noise. The self-recording hydrophone includes: an underwater acoustic sensor which is to measure underwater noise; a data transmission cable one end of which is electrically connected to the underwater acoustic sensor; a self-recording device which is placed inside a cylindrical housing having a certain length, is electrically connected to the other end of the data transmission cable, is operated by power supplied from a battery placed inside the housing, and filters, amplifies, and stores the underwater noise signal transmitted through the data transmission cable; and an inner protection frame which includes a plurality of protective inner frames arranged in a radial shape and a plurality of support rings each of which is combined with each inner frame in order to form a first protective space where the underwater acoustic sensor and the data transmission cable are accommodated and where the ends of the inner frames are combined to the longitudinal-direction end of the housing. The underwater acoustic sensor, the data transmission cable, and the housing are aligned on a straight line in the longitudinal direction of the housing. According to the present invention, the disclosed self-recording hydrophone is able to record underwater noise automatically, measure water temperature and water depth, have a structure available for continuous connection, and be easily separated from a weight, and also is able to measure and record the underwater noise, the water temperature, and the water depth of a ship, thereby enabling easy and accurate measurement of underwater radiated noise. Furthermore, it is possible to adjust the intervals among self-recording hydrophones.