SURFACE ACOUSTIC WAVE SENSOR SYSTEM AND MEASUREMENT METHOD USING MULTIPLE-TRANSIT-ECHO WAVE

摘要

PURPOSE: A surface acoustic wave sensor system and a method for measuring multiple reverberation waves are provided to improve the sensitivity of a surface acoustic wave sensor and to obtain the high integration of the surface acoustic wave sensor. CONSTITUTION: A surface acoustic wave sensor system comprises a signal generation unit, a surface acoustic wave sensor, and signal measuring unit. The signal generation unit applies electrical signals to the surface acoustic wave sensor. The surface acoustic wave sensor is connected to the signal generating unit, converts the electrical signals into surface acoustic waves, and converts the surface acoustic wave sensor output corresponding to a measurement object after sensing the measurement object with the surface acoustic waves. The signal measuring unit is connected to one side of the surface acoustic wave sensor and performs a time-gating of the multiple reverberation waves, thereby detecting electrical changes.