Cylinder pressure sensor

Details Cylinder pressure sensor Cylinder pressure sensor

1998-02-26

1999-08-10

Le, Que T.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

2502311, H01J 516

Patent

active

059362359

ABSTRACT:
A cylinder pressure sensor is adapted to detect a cylinder pressure by detecting a change in the amount of light being transmitted through an optical fiber in an axial direction. Two support portions support the optical fiber at two points along the length thereof. A diaphragm in contact with the optical fiber causes bending of the optical fiber in dependence upon a change in the cylinder pressure. The position at which a force is applied against the optical fiber by the diaphragm is deviated from a center position between the two support portions. The resulting cylinder pressure sensor is capable of accurately measuring cylinder pressure and knocking over a long period of time with a low cost and reduced initial variations.

REFERENCES:
patent: 5430815 (1995-07-01), Shen et al.

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