Patent ID: 6065353
Filing Date: 2000-05-23
Classification: G01L

Abstract:
A piezoelectric load sensor comprising:an upper conductor,a lower conductor,an intermediate conductor located between said upper and lower conductors,a plurality of upper piezoelectric elements interposed between said upper and intermediate conductors and arranged in a row, anda plurality of lower piezoelectric elements interposed between said lower and intermediate conductors and arranged in a row,piezoelectric constants of said plurality of upper piezoelectric elements being set to gradually decrease from an upper piezoelectric element located at one end in a direction of arrangement of the upper piezoelectric elements toward an upper piezoelectric element located at the other end in said direction of arrangement of the upper piezoelectric elements, andpiezoelectric constants of said plurality of lower piezoelectric elements being set to gradually increase from a lower piezoelectric element located at one end in a direction of arrangement of the lower piezoelectric elements toward a lower piezoelectric element located at the other end in said direction of arrangement of the lower piezoelectric elements.