Sensor mount

• US 6,435,902 B1
• Filed: 07/11/2000
• Issued: 08/20/2002
• Est. Priority Date: 07/11/2000
• Status: Expired due to Term

• Current Assignee: PCB Piezotronics, Inc. (Amphenol Corporation), Computational Systems Incorporated (Emerson Electric Company)
• Original Assignee: PCB Piezotronics, Inc. (Amphenol Corporation), CSI Technology Incorporated (Emerson Electric Company)
• Inventors: Traphagen, Michael, Lally, David M., Robinson, James C., Groh, William S.
• Primary Examiner(s): Patel, Tulsidas
• Assistant Examiner(s): WEBB, BRIAN SCOTT
• Application Number:
  US09/613,850
• Time in Patent Office: 770 Days
• Field of Search: 439/527, 738/665, 736/61, 374/208
• US Class Current: 439/527
• CPC Class Codes: G01H 1/003 of rotating machines G01H1/10 takes precedence
• CPC Class Codes: G01L 19/14 Housings G01L19/0007, G01L19/0084, G01L19/0092, G01L19/04, G01L19/06 take precedence
• CPC Class Codes: G01L 23/222 using piezoelectric devices
• CPC Class Codes: G01L 5/0061 Force sensors associated with industrial machines or actuators for the specific machine or actuator involved see relevant class, e.g. F01, F04, F16, B66, E21
• CPC Class Codes: G01P 1/023 for acceleration measuring devices
• CPC Class Codes: G10K 11/004 Mounting transducers, e.g. provided with mechanical moving or orienting device mountings specially adapted to a particular sound-producing device, see the preceding groups G10K1/00 - G10K9/00, e.g. G10K1/26, G10K1/28, G10K9/22; arrangements of sonic watch equipment on submarines B63G8/39; buoys B63B22/00

Abstract

A sensor mount provides for attachment of a vibration sensor or other sensor to a machine without having to turn or rotate the sensor. In conjunction with a sensor module having an integral sensor and a shoulder formed at the outer periphery of the sensor module, the invention provides a coupler having a lower threaded portion for being threadingly engaged with a corresponding threaded recess formed in the machine. An externally threaded upper portion of the coupler remains exposed above the machine structure. A fastener is configured to attach the sensor module to the coupler by engaging the sensor module shoulder and the exposed upper portion of the coupler. The fastener may be captured to the sensor module or separable therefrom. When attached to a machine, the fastener and coupler are substantially symmetrically positioned with respect to a central axis of the sensor.

Claims

1. An apparatus for holding a sensor module in sensory contact with a machine, the apparatus comprising:

a sensor module including;

a housing;

a sensor disposed in said housing and having a central axis, said sensor being of a type to sense a characteristic of the machine and to produce a sensor output corresponding to the machine characteristic that is sensed;

a substantially planar lower surface; and

a cable attached to the housing and electrically coupled to the sensor for conducting the sensor output, at least a portion of said cable being external to the housing;

a coupler for being attached to a machine, said coupler including;

a lower portion for being attached to a machine structural element; and

an upper exposed portion connected to the lower portion and having a substantially planar upper surface; and

a fastener for removably attaching the sensor module to the coupler without having to rotate the sensor with respect to the coupler during attachment.

2. The apparatus of claim 1, wherein the sensor module includes an accelerometer.

3. The apparatus of claim 1, wherein said coupler and said fastener are substantially symmetrically positioned with respect to the central axis of the sensor.

4. The apparatus of claim 1, wherein the upper portion of said coupler includes external threading and said fastener includes an internally threaded hex nut sized and configured for being threadingly engaged with the upper threaded portion of the coupler.

5. The apparatus of claim 4, wherein the lower portion of said coupler includes a recess for accepting a tool to facilitate separation of the coupler and fastener.

6. The apparatus of claim 1, wherein the lower portion of said coupler includes external threading for being threadingly engaged with a threaded recess formed in the machine.

7. The apparatus of claim 1, wherein the upper surface of the coupler includes a recess for accepting a tool to facilitate installation and removal of the coupler.

8. The apparatus of claim 1, wherein said sensor module further includes a shoulder and said fastener includes a lip for engaging the sensor module shoulder to establish and maintain contact between the sensor module lower surface and the coupler upper surface.

9. The apparatus of claim 1, wherein said fastener further includes multiple continuous threads requiring multiple turns of the fastener during attachment of the sensor module to the coupler.

10. An apparatus for attaching a vibration sensor to a machine, the apparatus comprising:

a sensor module having;

a housing;

an integral sensor disposed in said housing and having a central axis, said sensor being of a type to sense a characteristic of the machine and to produce a sensor output corresponding to the machine characteristic that is sensed;

a cable attached to the housing and electrically coupled to the sensor for conducting the sensor output, at least a portion of said cable being external to the housing;

a shoulder adjacent the sensor module outer periphery; and

a substantially planar lower surface;

a coupler for being removably attached to the outer surface of a machine, said coupler including;

a lower portion for being attached adjacent the machine'"'"'s outer surface; and

an upper exposed portion connected to the lower portion and having a substantially planar upper surface; and

a fastener for removably attaching the sensor module to the coupler without having to rotate the vibration sensor with respect to the coupler during attachment, said fastener including a lip for engaging the sensor module shoulder to establish and maintain contact between the sensor module lower surface and the coupler upper surface.

11. The apparatus of claim 10, wherein said coupler and said fastener are substantially symmetrically positioned with respect to the central axis of the sensor.

12. The apparatus of claim 10, wherein the upper portion of said coupler includes external threading and said fastener includes an internally threaded hex nut sized and configured for being threadingly engaged with the upper threaded portion of the coupler.

13. The apparatus of claim 12, wherein the lower portion of said coupler includes a recess for accepting a tool to facilitate separation of the coupler and fastener.

14. The apparatus of claim 10, wherein the lower portion of said coupler includes external threading for being threadingly engaged with a threaded recess formed in the machine.

15. The apparatus of Claim 10, wherein the upper surface of the coupler includes a recess for accepting a tool to facilitate installation and removal of the coupler.

16. The apparatus of claim 10, wherein said fastener further includes multiple continuous threads requiring multiple turns of the fastener during attachment of the sensor module to the coupler.

17. An apparatus for attaching a vibration sensor to a machine, the apparatus comprising:

a sensor module having;

a housing;

an integral vibration sensor disposed in said housing and having a central axis, said sensor being of a type to sense a characteristic of the machine and to produce a sensor output corresponding to the machine characteristic that is sensed;

a cable attached to the housing and electrically connected to the sensor for conducting the sensor output, at least a portion of said cable being external to the housing;

a shoulder adjacent the sensor module outer periphery; and

a substantially planar lower surface;

a coupler for being removably attached to the outer surface of a machine, said coupler including;

an externally threaded lower portion for being threadingly attached to a threaded recess formed in the machine'"'"'s outer surface; and

a threaded upper portion connected to the lower portion and having a substantially planar upper surface; and

an internally threaded fastener for removably attaching the sensor module to the upper portion of the coupler without having to rotate the vibration sensor with respect to the coupler during attachment, said fastener including a lip for engaging the sensor module shoulder to establish and maintain contact between the sensor module lower surface and the coupler upper surface, said fastener and said coupler being substantially symmetrically positioned with respect to said vibration sensor when the apparatus is attached to the machine.

18. The apparatus of Claim 17, wherein the lower portion of said coupler includes a recess for accepting a tool to facilitate separation of the coupler and fastener.

19. The apparatus of claim 17, wherein the upper surface of the coupler includes a recess for accepting a tool to facilitate installation and removal of the coupler.

20. The apparatus of claim 17, wherein said fastener further includes multiple continuous threads requiring multiple turns of the fastener during attachment of the sensor module to the coupler.

21. An apparatus for placing a vibration sensor in sensory contact with a machine, the apparatus comprising:

a sensor module having;

a vibration sensor for sensing vibrations produced by the machine and producing vibration signals corresponding to vibrations sensed by the sensor;

means for nonremovably housing said vibration sensor such that said vibration sensor is nonremovably contained within said means for nonremovably housing; and

a cable attached to said means for nonremovably housing and electrically coupled to the vibration sensor for conducting the vibration signals to a signal processing device external to said means for nonremovably housing;

a coupler for being attached to a machine, said coupler including;

a lower portion for being attached to a machine structural element; and

an upper exposed portion connected to the lower portion and having a substantially planar upper surface; and

a fastener for removably attaching the sensor module to the coupler without having to rotate the sensor with respect to the coupler during attachment.

22. The apparatus of claim 21, wherein said fastener further includes multiple continuous threads requiring multiple turns of the fastener during attachment of the sensor module to the coupler.