ACTIVE INDIRECT SEARCH APPARATUS

摘要

PROBLEM TO BE SOLVED: To correctly search an object by correctly synchronizing a generated wave and a received wave signal. SOLUTION: A wave emitted from a wave emission apparatus 1 passes a search object 3, is reflected or diffracted and, received by a receiving means 2. The emission and reception are considerably correctly synchronize with the utilization of a GPS time and analyzed by a processing apparatus 8. The wave emission apparatus 1 emits an elastic wave by rotating a weight eccentrically set to a rotary shaft. A correct elastic wave is emitted by precisely controlling a rotational frequency through control by a control means 4.