# US 2014/0360276 A1 · Pressure sensing system and method of housing a pressure sensor

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- Number: US 2014/0360276 A1
- Document ID: US20140360276A1
- Status: Published application
- Kind: A1
- Application number: 13/912,409
- Filed: 2013-06-07
- Published: 2014-12-11
- Earliest claimed: 2013-06-07
- Assignees: Baker Hughes Incorporated
- Inventors: Carl W. Stoesz; Sydnee Marie Hammond
- Web page: https://patentgrep.com/patent/US20140360276A1

## CPC

- G01L 11/025: {using a pressure-sensitive optical fibre}
- G01L 9/0077: {for measuring reflected light}
- Y10T 29/49826: Assembling or joining
- G01L: MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE (weighing G01G)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A pressure sensing system includes a pressure sensor, an optical fiber in operable communication with the pressure sensor, and a body having a diaphragm integrally formed therein and separated a distance from the optical fiber.

## Claims

### Claim 1

A pressure sensing system, comprising:
a pressure sensor;
an optical fiber in operable communication with the pressure sensor; and
a body having a diaphragm integrally formed therein and separated a distance from the optical fiber.

### Claim 2 (depends on 1)

The pressure sensing system of claim 1, wherein the body defines a cavity housing the pressure sensor and is sealedly engaged with the optical fiber extending through an opening in the body.

### Claim 3 (depends on 2)

The pressure sensing system of claim 2, wherein volume of the cavity when the body is sealed to an optical fiber is changed when the diaphragm is deformed.

### Claim 4 (depends on 3)

The pressure sensing system of claim 3, wherein pressure in the cavity changes in response to deformation of the diaphragm.

### Claim 5 (depends on 2)

The pressure sensing system of claim 2, wherein a relationship between displacement of a portion of the diaphragm and pressure changes within the cavity are linear.

### Claim 6 (depends on 2)

The pressure sensing system of claim 2, wherein pressure changes within the cavity are transmitted to the pressure sensor within the cavity by a fluid.

### Claim 7 (depends on 1)

The pressure sensing system of claim 1, wherein the diaphragm is configured to deform in response to forces acting thereagainst.

### Claim 8 (depends on 1)

The pressure sensing system of claim 1, wherein the optical fiber is in operable communication with the pressure sensor.

### Claim 9 (depends on 1)

The pressure sensing system of claim 1, wherein the diaphragm is flat.

### Claim 10 (depends on 1)

The pressure sensing system of claim 1, wherein the diaphragm is rectangular.

### Claim 11 (depends on 1)

The pressure sensing system of claim 1, wherein the body is sealedly engagable with a header that is sealedly engaged to the optical fiber.

### Claim 12 (depends on 11)

The pressure sensing system of claim 11, wherein the body is radially compressed against the header by at least one ferrule deformed into radial interference with the body.

### Claim 13 (depends on 1)

The pressure sensing system of claim 1, wherein the body is one of metal, polymer and glass.

### Claim 14 (depends on 1)

The pressure sensing system of claim 1, wherein the body is configured such that substantially only the diaphragm is deformable.

### Claim 15

A method of housing a pressure sensor, comprising:
forming a diaphragm integrally in a body, the diaphragm being deformable in response to forces acting thereagainst; and
enclosing a pressure sensor within a cavity defined by the body separated a distance from the diaphragm.

### Claim 16 (depends on 15)

The method of housing a pressure sensor of claim 15, further comprising functionally connecting an optical fiber to the pressure sensor.

### Claim 17 (depends on 16)

The method of housing a pressure sensor of claim 16, further comprising swaging a ferrule to radially compress the body between the ferrule and a header sealed to the optical fiber.

### Claim 18 (depends on 15)

The method of housing a pressure sensor of claim 15, wherein the forming the diaphragm includes flattening a rectangular portion of the body.

### Claim 19 (depends on 15)

The method of housing a pressure sensor of claim 15, wherein the forming the diaphragm includes altering a thickness of the body at the diaphragm.

### Claim 20 (depends on 15)

The method of housing a pressure sensor of claim 15, wherein the forming a diaphragm is through hydroforming.

### Claim 21 (depends on 15)

The method of housing a pressure sensor of claim 15, further comprising etching or machining the diaphragm.

### Claim 22 (depends on 15)

The method of housing a pressure sensor of claim 15, wherein the forming a diaphragm includes creating convolutions in the body.