Piezoelectric load sensor, and process for detecting load-applie

Details Piezoelectric load sensor, and process for detecting load-applie Piezoelectric load sensor, and process for detecting load-applie

1998-07-01

2000-05-23

Noori, Max

Measuring and testing

Dynamometers

Responsive to force

73777, G01L 116

Patent

active

060653531

ABSTRACT:
A piezoelectric load sensor includes a plurality of upper piezoelectric elements interposed between upper and intermediate conductors and arranged in a row. A plurality of lower piezoelectric elements are interposed between lower and intermediate conductors and arranged in a row. The upper piezoelectric elements have their piezoelectric constants set so that they gradually decrease from the piezoelectric element located at one end in a direction of arrangement of the upper piezoelectric elements toward the piezoelectric element located at the other end in the direction of arrangement. The lower piezoelectric elements have their piezoelectric constants set so that they gradually increase from the piezoelectric element located at one end in a direction of arrangement of the lower piezoelectric elements toward the piezoelectric element located at the other end in the direction of arrangement. Thus, a load-applied position can be detected from a ratio of voltages generated by one set of the upper and lower piezoelectric elements.

REFERENCES:
patent: 4841494 (1989-06-01), Banno
patent: 5195046 (1993-03-01), Gerardi et al.
patent: 5288551 (1994-02-01), Sato et al.
patent: 5377547 (1995-01-01), Kusakabe et al.
patent: 5504388 (1996-04-01), Kimura et al.

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