SYSTEM FOR MEASURING A VARIATION PRESSURE INDUCED BY A SHIP PROPELLER CAVITATION

摘要

PURPOSE: A system for measuring a variation pressure is provided to prevent a vibration according to a variation of rotation frequency. CONSTITUTION: The system for measuring a variation pressure induced by a ship propeller cavitation comprises a pressure converting part(20), a tape recorder(22), a FFT analyzer(23), an oscilloscope(24), an up and down transfer part(32). The pressure converting part(20) have a variation pressure plate(11) disposed at a top of a propeller, and a signal measured in the pressure converting part(20) is stored in the tape recorder(22) through an amplifier(21). The FFT analyzer analyzes a frequency, and the oscilloscope(24) is used to confirm an exact degree of the measurement. The up and down transfer part(32) performs an up and down movement so as to be minimized a vibration.