System and method for pressure measurement

• US 7,270,010 B2
• Filed: 08/27/2004
• Issued: 09/18/2007
• Est. Priority Date: 08/27/2004
• Status: Expired due to Fees

• Current Assignee: Ashcroft-Nagano, Inc. (GE Aerospace)
• Original Assignee: Ashcroft-Nagano, Inc. (GE Aerospace)
• Inventors: Kaneko, Yoshikazu, Wada, Yoshinori, Shimada, Shuji, Yanagisawa, Ikuhiro, Loxsom, William J., Kosh, William Stephen
• Primary Examiner(s): NOORI, MAX H
• Application Number:
  US10/928,024
• Publication Number:
  US 20060042393A1
• Time in Patent Office: 1,117 Days
• Field of Search: 737/56, 737/20, 737/15, 737/53, 737/54
• 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 adapted to condition an electrical signal from the pressure detecting component; and

a circuit board housing separate from the pressure inlet joint, the circuit board housing at least partially enclosing the pressure detecting component and coupled to the circuit board, the circuit board housing consisting essentially of a unitary body of thin, homogeneous metallic material and having a substantially circular cross-section, the circuit board housing comprising a larger diameter section and a smaller diameter section, the smaller diameter section coupled to the pressure inlet joint, the circuit board located in the circuit board housing and 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 toward and substantially parallel to the axis of revolution of the circuit board housing, each column including an end engaged with the circuit board.

3. The pressure measurement system according to claim 2, wherein the columns are substantially semi-cylindrical and extend substantially parallel to the axis of revolution of the circuit board housing from the smaller diameter section toward the larger diameter section.

4. The pressure measurement system according to claim 2, wherein the circuit board housing further comprises a projection formed on the end of at least one column, the projection engaged with the circuit board.

5. The pressure measurement system according to claim 4, wherein the circuit board housing composes a projection formed on the end of each column the projections being arranged at unequal intervals around the axis of revolution of the circuit board housing.

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 structurally integrated with the pressure inlet joint by spot welding at a plurality of points.

10. The pressure measurement system according to claim 9, wherein at least part of the smaller diameter section parallel to the axis of revolution of the circuit board housing 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.

21. The pressure measurement system according to claim 1, wherein the mass of the metallic material of the circuit board housing facilitates soldering of the circuit board housing to the circuit board.

22. The pressure measurement system according to claim 2, wherein the columns are formed from the circuit board housing.

23. The pressure measurement system according to claim 4, wherein the projection is formed from the column.

24. The pressure measurement system according to claim 4, wherein the projection is engaged with the circuit board by soldering, brazing, or welding.

29. The pressure measurement system of claim 1, wherein the circuit board housing consists of an integral piece of the metallic material.

30. The pressure measurement system of claim 1, wherein the metallic material has a maximum thickness of approximately one-fiftieth of an inch, and the outer dimensions of the circuit board housing are less than approximately one inch.

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 comprising a plurality of columns formed toward and substantially parallel to the axis of revolution of the circuit board housing, each column including an end adapted to engage with a circuit board housed by the circuit board housing, the circuit board housing consisting essentially of a unitary body of thin, homogeneous metallic material and having a substantially circular cross-section, the circuit board housing comprising a larger diameter section and a smaller diameter section, the smaller diameter section adapted to couple to a pressure inlet joint.

13. The pressure measurement system of claim 12, wherein the metallic material has a maximum thickness of approximately one-fiftieth of an inch, and the outer dimensions of the circuit board housing are less than approximately one inch.

14. The circuit board housing according to claim 12, wherein the columns are substantially semi-cylindrical and extend substantially parallel to the axis of revolution of the circuit board housing from the smaller diameter section toward the larger diameter section.

15. The circuit board housing according to claim 12, wherein the circuit board housing further comprises a projection formed on the end of at least one column, the projection adapted to engage a circuit board housed by the circuit board housing.

16. The circuit board housing according to claim 15, wherein the circuit board housing comprises a projection formed on the end of each column, the projections being arranged at unequal intervals around the axis of revolution of the circuit board housing.

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 housed by the circuit board housing.

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

19. The circuit board housing according to claim 18, wherein at least part of the smaller diameter section parallel to the axis of revolution of the circuit board housing can engage the pressure inlet joint, and the welds occur in this part.

25. The circuit board housing according to claim 12, wherein the mass of the metallic material of the circuit board housing facilitates soldering of the circuit board housing to a circuit board housed by the circuit board housing.

26. The circuit board housing of claim 13, wherein the columns arc formed from the circuit board housing.

27. The circuit board housing of claim 15, wherein the projection is formed from the column.

28. The pressure measurement system according to claim 15, wherein the projection is adapted to engage a circuit board by soldering, brazing, or welding.

31. The pressure measurement system of claim 12, wherein the circuit board housing consists of an integral piece of the metallic material.

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 adapted to amplify an electrical signal from the pressure detecting component;

a circuit board housing separate from the pressure inlet joint, the circuit board housing partially enclosing the pressure detecting component and engaging the circuit board, the circuit board housing consisting essentially of a unitary body of thin, homogeneous, integral metallic material and having a substantially circular cross-section and comprising;

a larger diameter section,

a smaller diameter section, the smaller diameter section structurally integrated with the pressure inlet joint by spot welding at a plurality of points along at least part of the smaller diameter section parallel to the axis of revolution of the circuit board housing that engages the pressure inlet joint, and

a plurality of substantially semi-cylindrical columns formed from the circuit board housing, the columns formed toward and substantially parallel to the axis or revolution of the circuit board housing and extending substantially parallel to the axis of revolution of the circuit board housing from the smaller diameter section toward the larger diameter section, each column including a cover having a projection formed therefrom and engaged with the circuit board by soldering, the projections arranged at unequal intervals around the axis of revolution of the circuit board housing, the circuit board located in the circuit board housing and 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.