Seat weight sensor using fluid filled tubing

Details Seat weight sensor using fluid filled tubing Seat weight sensor using fluid filled tubing

1998-01-07

2000-02-08

Ellis, Christopher P.

Motor vehicles

With means for promoting safety of vehicle, its occupant or...

Responsive to absence or inattention of operator, or...

280735, 297DIG3, B60K 2800

Patent

active

060218630

ABSTRACT:
A hydrostatic weight sensor comprises a continuous flexible sensing tube incorporated within the seat. A fluid is contained therein and a pressure sensor is operatively coupled thereto. The continuous flexible sensing tube may be arranged in a spiral or serpentine pattern, or comprise a plurality of segments each in fluid communication with a central port. A load applied to the seat causes the continuous flexible sensing tube to deform, thereby increasing the pressure of the fluid contained therein. A signal processor calculates the weight of the occupant from the pressure signal, and controls a safety restraint system responsive to the weight measurement.

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