FLOW RATE LEVEL MEASUREMENT SYSTEM BY ACOUSTIC IMPEDANCE MATCHING

摘要

PURPOSE: A flow rate level measurement system is provided to easily measure a flow rate level by using polyethylene as a planar medium. CONSTITUTION: A flow rate level measurement system includes a limit switch(100), a signal input section, a signal measurement section, and an oscillating circuit section. The limit switch(100) has a planar medium(130) for achieving an acoustic impedance matching with respect to an object medium, a piezoelectric ceramic plate(140) formed at both sides of an upper surface of the planar medium(130), and an electrode(150) formed on an upper surface of the piezoelectric ceramic plate(140). The signal input section inputs an AC signal into a driving section(110). The signal measurement section measures a signal inputted into a signal receiving section.