Structural enclosure for machine sensors

• US 5,952,803 A
• Filed: 01/26/1998
• Issued: 09/14/1999
• Est. Priority Date: 08/22/1996
• Status: Expired due to Fees

• Current Assignee: CSI Technology Incorporated (Emerson Electric Company)
• Original Assignee: CSI Technology Incorporated (Emerson Electric Company)
• Inventors: Robinson, James C., Canada, Ronald G., Pardue, Eugene F.
• Primary Examiner(s): Ro, Bentsu
• Application Number:
  US09/013,244
• Time in Patent Office: 596 Days
• Field of Search: 318/558, 318/538, 318/490, 73/431
• US Class Current: 318/558
• CPC Class Codes: G01R 31/343 in operation
• CPC Class Codes: G01R 33/028 Electrodynamic magnetometers
• CPC Class Codes: G07C 3/00 Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
• CPC Class Codes: H02K 11/0094 Structural association with other electrical or electronic devices
• CPC Class Codes: H02K 11/20 for measuring, monitoring, testing, protecting or switching rectifiers H02K11/04; power electronics H02K11/33
• CPC Class Codes: H02K 11/25 Devices for sensing temperature, or actuated thereby
• CPC Class Codes: H02K 11/33 Drive circuits, e.g. power electronics H02K11/38 takes precedence
• CPC Class Codes: H02K 11/35 Devices for recording or transmitting machine parameters, e.g. memory chips or radio transmitters for diagnosis

Abstract

A machine monitor provides information for ascertaining the health and condition of a machine. The monitor is self-contained, having its own internal power source, electronics, and sensor suite, and attaches directly to the outer frame of the machine. Sensors disposed within the monitor include a machine frame temperature sensor, flux sensor, vibration sensor, and clock. Electronics are also disposed within the monitor for receiving and processing sensor outputs, producing machine status data which is stored over time. Sensors and electronics are housed in a protective bucket which includes an upper housing element joined with a lower housing element. The monitor is attached to the machine in such a way that an engagement surface formed in the monitor establishes sensory contact with the machine, enabling machine sensors disposed in the monitor to sense the machine characteristics. A communications port enables a peripheral device, such as a notebook computer or portable data collector, to communicate with the monitor and download data stored in memory. Downloaded data can be further analyzed and statistically compared to trend data at a base computer to ascertain the health and condition of the machine. The monitor electronics are configured to consume very little power so that the internal power source will continue to power the monitor for extended periods of time.

Claims

1. A bucket for attaching a sensor to a machine and for protecting the sensor after attachment, said bucket comprising:

a first housing element formed of a rigid material and having a substantially continuous wall forming a closed end in opposed relation to an open end;

a second housing element formed of a rigid material and having a substantially continuous wall forming a closed end in opposed relation to an open end;

an engagement surface formed in the closed end of said second housing element;

means for connecting the open end of said first housing element to the open end of said second housing element to form a chamber enclosed by said first and second housing elements;

means disposed in said chamber for mounting a machine sensor to sense an operating characteristic of the machine, said sensor producing a sensor output corresponding to the characteristic that was sensed;

a seal disposed between the open ends of said first and second housing elements to prevent intrusion of moisture and other contaminants to the chamber when the open ends are connected; and

means for attaching said second housing element to a machine so that said engagement surface is in sensory contact with the machine.

2. The bucket of claim 1, further comprising a pedestal extending from said engagement surface into said chamber for conducting one or more machine operating characteristics to be sensed to the chamber.

3. The bucket of claim 2 wherein said pedestal includes a thermally conductive material for conducting heat produced by the machine.

4. The bucket of claim 1, further comprising:

sensor electronics disposed in said chamber for processing and storing said sensor output; and

means for mounting said sensor electronics in said chamber.

5. The bucket of claim 4 wherein said means for mounting said sensor electronics includes:

a shelf disposed in said chamber for inhibiting movement of sensor electronics in a first direction; and

a fastener for inhibiting movement of said sensor electronics in at least a second direction which is different than said first direction.

6. The bucket of claim 4, further comprising a communication port formed in said bucket for communicating between sensor electronics and a peripheral device.

7. The bucket of claim 1 wherein said engagement surface extends outwardly beyond a portion of the closed end of the second housing element and is substantially centrally positioned with respect to said closed end of the second housing element.

8. The bucket of claim 1 wherein said means for connecting includes:

a plurality of daggers formed in the open end of said first housing element; and

a plurality of slots formed in the open end of said second housing element in spatial alignment with said plurality of daggers so that when the open ends of the first and second housing elements are adjacent each other, movement of the first housing element in a first direction relative to the second housing element causes each of said plurality of daggers to engage a unique one of said plurality of slots, thereby connecting the first and second housing elements, and when the open ends of the first and second housing elements are adjacent each other, movement of the first housing element in a second direction which is opposite to the first direction causes each of said plurality of daggers to disengage from said plurality of slots, thereby disconnecting the first and second housing elements.

9. The bucket of claim 1 wherein said means for connecting includes a clamp positioned to hold the open ends of said first and second housing elements in compression.

10. The bucket of claim 1 wherein said means for connecting and said seal collectively comprise an adhesive applied between the open ends of the first and second housing elements.

11. The bucket of claim 1 wherein said means for mounting a machine sensor includes an adhesive for securing said sensor to an interior wall of said chamber.

12. The bucket of claim 1 wherein said means for mounting a machine sensor includes:

a substrate on which said sensor is attached;

a shelf disposed in said chamber for inhibiting movement of the substrate in a first direction; and

a fastener for inhibiting movement of said substrate in at least a second direction which is different than said first direction.

13. The bucket of claim 1 wherein said seal further comprises a resilient gasket positioned between the open ends of the first and second housing elements.

14. The bucket of claim 1 wherein said means for attaching includes:

a threaded fastener attached to the machine; and

a recess formed in the closed end of said second housing element and threaded to receive said threaded fastener so that when the recess and threaded fastener are engaged, the bucket is attached to the machine and the engagement surface is in sensory contact with the machine.

15. The bucket of claim 1 wherein said means for attaching includes a magnet mount.

16. The bucket of claim 1, further comprising a flat formed on the inner wall of said chamber for supporting an external conduit.

17. A protective enclosure for an electronic machine monitor, said enclosure comprising:

a first housing element formed of a rigid material and having a substantially continuous wall forming a closed end in opposed relation to an open end;

a second housing element formed of a rigid material and having a substantially continuous wall forming a closed end in opposed relation to an open end;

means for connecting the open end of said first housing element to the open end of said second housing element to form a chamber enclosed by said first and second housing elements;

means disposed within said chamber for attaching a machine sensor to the second housing element;

a seal disposed between the open ends of said first and second housing elements to prevent intrusion of moisture and other contaminants to the chamber when the open ends are connected; and

a fastener for attaching said second housing element to a machine so that the second housing element is in sensory contact with the machine.

18. A machine sensor protection system comprising:

a first housing element formed of a rigid material and having a substantially continuous wall forming a closed end in opposed relation to an open end;

a second housing element formed of a rigid material and having a substantially continuous wall forming a closed end in opposed relation to an open end;

an engagement surface formed in the closed end of said second housing element;

means for connecting the open end of said first housing element to the open end of said second housing element to form a chamber enclosed by said first and second housing elements;

a seal disposed between the open ends of said first and second housing elements to prevent intrusion of moisture and other contaminants to the chamber when the open ends are connected;

a machine sensor in sensory contact with said engagement surface for sensing an operating characteristic of the machine, producing a sensor output corresponding to the characteristic that was sensed;

sensor electronics disposed in said chamber for processing and storing the sensor output;

a communication port formed in one of said housing elements for communicating between said sensor electronics and a peripheral device; and

means for attaching said second housing element to a machine so that said engagement surface is in sensory contact with the machine.