SENSING APPARATUS FOR PIEZO CABLE

摘要

PURPOSE: A sensing apparatus for Piezo cable is provided to measure easily the dynamic characteristic voltage of the Piezo cable by setting up a voltage and peak value and confirming the dynamic characteristic. CONSTITUTION: The analog circuit(10) detects the voltage change of the Piezo cable(100). The A/D converter(20) converts the analog signal detected from the analog circuit to the digital signal. The control means(30) watches the external change by comparing the mean value and peak value of the dynamic characteristic voltage with the digital signal. The display(40) outputs selectively the mean value and peak value. The keypad(50) sets up the mean value and peak value. The analog circuit includes the offset circuit and impedance matching circuit.