System and method for pressure measurement

• US 20060042393A1
• Filed: 08/27/2004
• Published: 03/02/2006
• Est. Priority Date: 08/27/2004
• Status: Active Grant

• Current Assignee: Ashcroft-Nagano, Inc. (GE Aerospace)
• Original Assignee: Ashcroft-Nagano, Inc. (GE Aerospace)
• Inventors: Kaneko, Yoshikazu, Loxsom, William J., Kosh, William Stephen, Wada, Yoshinori, Shimada, Shuji, Yanagisawa, Ikuhiro
• Granted Patent: US 7,270,010 B2
• Time in Patent Office: Days
• US Class Current: 73/753
• CPC Class Codes: G01L 19/143 Two part housings
• CPC Class Codes: G01L 19/148 Details about the circuit board integration, e.g. integrated with the diaphragm surface or encapsulation
• CPC Class Codes: G01L 9/0055 bonded on a diaphragm

Abstract

A pressure measurement system may provide ready manufacturing, reliable operation, and/or enhanced performance by using a circuit board housing. In particular implementations, a pressure measurement system includes a pressure inlet joint, a pressure detecting component, a circuit board, and a circuit board housing. The pressure detecting component is coupled to the pressure inlet joint, which is adapted to introduce a pressure of a fluid. The circuit board is coupled to the pressure detecting component and is operable to condition an electrical signal from the pressure detecting component. The circuit board housing at least partially encloses the pressure detecting component and is adapted to engage the circuit board. The circuit board housing has a substantially cylindrical shape and includes a larger diameter section and a smaller diameter section, the smaller diameter section coupled to the pressure inlet joint, the circuit board located at least in part in the larger diameter section.

Claims

1. A pressure measurement system, the system comprising:

a pressure inlet joint adapted to introduce a pressure of a fluid;

a pressure detecting component coupled to the pressure inlet joint;

a circuit board coupled to the pressure detecting component and operable to condition an electrical signal from the pressure detecting component; and

a circuit board housing at least partially enclosing the pressure detecting component and adapted to engage the circuit board, the circuit board housing having a substantially cylindrical shape and comprising a larger diameter section and a smaller diameter section, the smaller diameter section coupled to the pressure inlet joint, the circuit board located at least in part in the larger diameter section.

2. The pressure measurement system according to claim 1, wherein the circuit board housing comprises a plurality of columns formed substantially parallel to the longitudinal axis of the circuit board housing, each column including a cover, the circuit board engaged with the covers of the columns.

3. The pressure measurement system according to claim 2, wherein the columns are substantially semi-cylindrical and extend from the smaller diameter section toward the larger diameter section.

4. The pressure measurement system according to claim 2, wherein a projection is formed on the cover of at least one column, the projection adapted to be coupled to the circuit board.

5. The pressure measurement system according to claim 4, wherein a plurality of projections are formed on the covers of the columns, the projections being arranged at unequal intervals around the cylinder.

6. The pressure measurement system according to claim 4, wherein the projection is electrically coupled to a ground line of the circuit board.

7. The pressure measurement system according to claim 6, wherein the projection is electrically coupled to the pressure inlet joint.

8. The pressure measurement system according to claim 1, further comprising an electrical connector electrically coupled to the circuit board for connection to an external device.

9. The pressure measurement system according to claim 1, wherein the smaller diameter section of the circuit board housing is coupled to the pressure inlet joint at a plurality of points by spot welding.

10. The pressure measurement system according to claim 9, wherein at least part of the longitudinal portion of the smaller diameter section engages the pressure inlet joint, and the welds occur in this part.

11. The pressure measurement system according to claim 1, further comprising a second housing at least partially enclosing the circuit board housing, the second housing coupled to the pressure inlet joint.

12. A circuit board housing for a pressure measurement system, the circuit board housing adapted to at least partially enclose a pressure detecting component and to engage a circuit board, the circuit board housing having a substantially cylindrical shape and comprising a larger diameter section and a smaller diameter section, the smaller diameter section adapted to couple to a pressure inlet joint.

13. The circuit board housing according to claim 12, wherein the circuit board housing comprises a plurality of columns formed substantially parallel to the longitudinal axis of the circuit board housing, each column including a cover, the covers of the columns adapted to engage with a circuit board.

14. The circuit board housing according to claim 13, wherein the columns are substantially semi-cylindrical and extend from the smaller diameter section toward the larger diameter section.

15. The circuit board housing according to claim 13, wherein a projection is formed on the cover of at least one column, the projection adapted to be coupled to a circuit board.

16. The circuit board housing according to claim 15, wherein a plurality of projections are formed on the covers of the columns, the projections being arranged at unequal intervals around the cylinder.

17. The circuit board housing according to claim 15, wherein the projection is adapted to be electrically coupled to a ground line of a circuit board.

18. The circuit board housing according to claim 12, wherein the smaller diameter section is adapted to be coupled to a pressure inlet joint at a plurality of points by spot welding.

19. The circuit board housing according to claim 18, wherein at least part of the longitudinal portion of the smaller diameter section is adapted to engage a pressure inlet joint around the weld points.

20. A pressure measurement system comprising:

a pressure inlet joint adapted to introduce a pressure of a fluid;

a pressure detecting component coupled to the pressure inlet joint;

a circuit board coupled to the pressure detecting component and operable to amplify an electrical signal from the pressure detecting component;

a circuit board housing partially enclosing the pressure detecting component and adapted to engage the circuit board, the circuit board housing having a substantially cylindrical shape and comprising;

a larger diameter section,

a smaller diameter section, the smaller diameter section coupled to the pressure inlet joint at a plurality of points by spot welding, at least part of the longitudinal portion of the smaller diameter section engaging the pressure inlet joint around the welds, and

a plurality of substantially semi-cylindrical columns formed substantially parallel to the longitudinal axis of the circuit board housing and extending from the smaller diameter section toward the larger diameter section, each column including an upper cover having a projection formed thereon to couple to the circuit board, the projections spaced at unequal intervals around the cylinder, the circuit board held on the upper covers of the columns in the larger diameter section by the projections, at least one of the projections electrically coupled to a ground line of the circuit board and to the pressure inlet joint;

a housing partially enclosing the circuit board housing, the housing coupled to the pressure inlet joint; and

an electrical connector electrically coupled to the circuit board for connection to an external device.