Integrated optoelectronic combustion pressure sensor

摘要

A pressure port has a diaphragm at one end for exposure to combustion pressure, with an electrical connector attached to the other end. Terminal blades and a lead frame are moulded in the connector and carry an optoelectronic circuit. A fiber=optic assembly is provided between the circuit and the diaphragm. The 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.