Sensor module integrating both the measurement of a rod...

Details Sensor module integrating both the measurement of a rod... Sensor module integrating both the measurement of a rod...

2005-03-29

2005-03-29

Siconolfi, Robert A. (Department: 3683)

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

C073S132000

Reexamination Certificate

active

06871916

ABSTRACT:
A sensor module including a processing unit, a stroke sensor and a force sensor (3) for obtaining data relating to both a force exerted on an axially-moving rod (1) and the travel of the rod through a determination of the position of the piston (2) with respect to the rod (1). The sensor module is characterized by a first stationary electrical coil (5) that is arranged about the piston (2) and the rod (1) and a second moving electrical coil (6) that is disposed about the rod (1) and connected to the force sensor (3). The first (5) and second (6) coils are coaxial and as a result induced oscillatory voltage within the stationary coil (5) generates an eddy current within the piston (2) that permit a measurement of the stroke of the piston (2) by means of eddy-current signal received by the stroke sensor using the piston (2) as a test body, and supplying the force sensor with electrical power through the second moving electrical coil (6). The first stationary electrical coil (5) is further used as a medium for the transmission of an electrical measurement signal (S) that is generated by the force sensor (3).

REFERENCES:
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patent: 5772290 (1998-06-01), Heibel et al.
patent: 6422125 (2002-07-01), Fulks
patent: 6612659 (2003-09-01), Fulks et al.

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