Pressure, force and torque measuring device
AssigneeRobert Bosch GmbH
InventorsHerbert Reger, Rudolf Heinz, Rainer Martin, Manfred Moser, Hans Braun
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Abstract
A device for measuring a force, a pressure or a torque transmitted in a force path between first and second apparatus components, includes at least three mutually spaced piezo-resistive resistor elements disposed in the force path between the first and second apparatus components such that the apparatus components orthogonally stress the resistor elements.
Claims15
In an apparatus including a first and a second apparatus component disposed adjacent one another and a measuring device for measuring a force, a pressure or a torque transmitted in a force path between the first and second apparatus components, the improvement comprising at least three mutually spaced thick-film piezo-resistive resistor elements disposed in said force path between said first and second apparatus components such as to be exposed to orthogonal stresses from said first and second apparatus components;
- means for maintaining an orthogonal bias by said first and second apparatus components on each said resistor element;
- said orthogonal bias being of such a magnitude that a minimum bias is maintained for all said resistor elements at all times.
An apparatus comprising a first and a second apparatus component disposed adjacent one another along an axis and a measuring device for measuring a force oriented parallel to said axis and being transmitted in a force path between the first and second apparatus components;
- at least three mutually spaced thick-film piezo-resistive resistor elements disposed in said force path between said first and second apparatus components such as to be exposed to orthogonal stresses from said first and second apparatus components;
- means for maintaining an orthogonal bias by said first and second apparatus components on each said resistor element;
- said orthogonal bias being of such a magnitude that a minimum bias is maintained for all said resistor elements at all times.
Dependencies are inferred from the claim text.