PRESSURE SENSOR - NGK SPARK PLUG CO

Title:

PRESSURE SENSOR

Document Type and Number:

WIPO Patent Application WO/2018/012007

Kind Code:

A1

Abstract:

In the present invention, the accuracy of measuring pressure is improved in a pressure sensor. This pressure sensor comprises: a cylindrical casing that extends in the axial direction; a diaphragm joined to the distal-end side of the casing, the diaphragm expanding in a direction that intersects the axis of the casing and the diaphragm deforming in accordance with pressure received on the distal-end side; and a sensor unit disposed inside the casing, the sensor unit outputting an electric signal that corresponds to the deformation of the diaphragm. The diaphragm is provided with a plate-shaped base part and three or more protruding parts that protrude from the distal-end-side surface of the base part toward the distal-end side, the protruding parts being set apart from each other. The relationships 0.05T ≤ H ≤ 2.5T and 0.05 ≤ (S2/S1) ≤ 0.8 hold, where T is the thickness of the base part, H is the axial-direction length of the protruding parts, S1 is the area of a base distal-end surface that would be the distal-end-side surface of the base part if the protruding parts were not present, and S2 is the total area of the protrusion distal-end surfaces that are the distal-end-side surfaces of the three or more protruding parts.

Inventors:

FUJI YUSUKE (JP)
YAMADA TATSUNORI (JP)
GOTO DAIKI (JP)
IWABUCHI JUNKI (JP)

Application Number:

PCT/JP2016/086529

Publication Date:

January 18, 2018

Filing Date:

December 08, 2016

Export Citation:

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Assignee:

NGK SPARK PLUG CO (JP)

International Classes:

G01L23/22; G01L7/08; G01L23/10

Foreign References:

JP2016118494A	2016-06-30
JP2009186209A	2009-08-20

Other References: