Integrated optoelectronic combustion pressure sensor
AssigneeDelco Electronics Corporation
InventorAndres Deogracias Viduya
Life of this patent
Estimating the term…
Abstract
A pressure port has a diaphragm at one end for exposure to combustion pressure, an electrical connector attached to the other end, terminal blades and a lead frame molded in the connector and carrying an optoelectronic circuit, and a fiber optic assembly between the circuit and the diaphragm. The fiber optic assembly illuminates the diaphragm which reflects light according to its deflection to two fiber elements that carry reflected light to the circuit. The assembly includes a high temperature plastic body and a ceramic tip for temperature isolation to protect the plastic body and the optoelectronic circuit.
Claims5
An optoelectronic combustion pressure sensor of the type which optically measures diaphragm deflection comprising:
- a hollow metal casing having a first end for exposure to the pressure being measured and a second end;
- a diaphragm secured to the first end and subject to deflection according to pressure;
- an electrical connector attached to the second end, the connector comprising an insulating housing and inner conductors;
- the housing having a recess adjacent the second end;
- an optoelectronic circuit in the recess mounted on the inner conductors;
- and
- a fiber optic assembly seated in the recess adjacent the circuit and extending through the casing for coupling light between the optoelectronic circuit and the diaphragm.
Dependencies are inferred from the claim text.