Piezoelectric film load cell robot collision detector

Details Piezoelectric film load cell robot collision detector Piezoelectric film load cell robot collision detector

1988-03-15

1989-04-18

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to force

310338, 310800, G01L 116

Patent

active

048215848

ABSTRACT:
A piezoelectric load cell which can be utilized for detecting collisions and obstruction of a robot arm end effector includes a force sensing element of metallized polyvinylidene fluoride (PVDF) film. The piezoelectric film sensing element and a resilient support pad are clamped in compression between upper and lower plates. The lower plate has a central recess in its upper face for supporting the support pad and sensing element, while the upper plate has a corresponding central projection formed on its lower face for bearing on the sensing element and support pad. The upper and lower plates are dowelled together for concentric alignment and screwed together. The upper and lower plates are also adapted for mounting between the robot arm wrist and end effector.

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