Force sensor

Details Force sensor Force sensor

1989-11-27

1991-01-08

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to force

7386257, 73DIG3, 172 7, G01L 126, G01L 513

Patent

active

049826131

ABSTRACT:
A force sensor has a hollow flexible body with a fixed end and a free end. The force to be measured is applied perpendicular to the axis of the flexible body by a link coupled to the free end. A rigid gauge rod is connected to the free end of the flexible body and extends through the interior of the flexible body. The rod carries on its free end a permanent magnet which is near a Hall-effect sensor which is fixed to the fixed end of the body. The flexible body has a relatively low bending stiffness at its free end (in the area of force application) and an increasing bending stiffness towards its fixed end. The flexible body has a relatively low bending stiffness in the direction of force application and a higher bending stiffness in a perpendicular direction. The permanent magnet is arranged so that its poles are aligned parallel to the direction of force application.

REFERENCES:
patent: 3888315 (1975-06-01), Elfes et al.
patent: 4271910 (1981-06-01), Schafer
patent: 4315548 (1982-02-01), Nakamura et al.
patent: 4456074 (1984-06-01), Prudenziati
patent: 4497375 (1985-02-01), Mucheyer et al.

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