Condition monitoring and battery recharging system

• US 6,323,619 B1
• Filed: 09/29/2000
• Issued: 11/27/2001
• Est. Priority Date: 09/29/2000
• Status: Expired due to Fees

• Current Assignee: Rockwell Automation Technologies Incorporated (Allen-Bradley Co., Inc.)
• Original Assignee: Reliance Electric Technologies LLC (ABB Limited)
• Inventors: El-Ibiary, Yehia
• Primary Examiner(s): Tso, Edward H.
• Application Number:
  US09/675,308
• Time in Patent Office: 424 Days
• Field of Search: 320/101, 320/104, 320/107, 320/112, 320/123, 320/DIG.33, 320/DIG.34, 324/426, 324/433
• US Class Current: 320/107
• CPC Class Codes: F16C 19/52 with devices affected by abnormal or undesired conditions
• CPC Class Codes: F16C 2226/16 by wedge action, e.g. by tapered or conical parts
• CPC Class Codes: F16C 35/042 Housings for rolling element bearings for rotary movement
• CPC Class Codes: F16C 35/073 between shaft and inner race ring
• CPC Class Codes: F16C 41/007 Encoders, e.g. parts with a plurality of alternating magnetic poles
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H02J 7/32 for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A system for monitoring a characteristic of a dynamic member is disclosed. The system includes a sensor device operative to sense the characteristic of the dynamic member and to generate a first signal in response to the sensed characteristic. A monitor is in communication with the sensor device, the monitor wirelessly transmitting a second signal responsive to the first signal. A battery is in electrical communication with the sensor device and monitor. The sensor device charges the battery via the first signal, the battery powering the monitor.

Claims

1. A system for monitoring a characteristic of a dynamic member, the system comprising:

a sensor device operative to sense the characteristic of the dynamic member and to generate a first signal in response to the sensed characteristic;

a monitor in communication with the sensor device, the monitor wirelessly transmitting a second signal responsive to the first signal; and

a battery in electrical communication with the sensor device and monitor, the sensor device charging the battery via the first signal, the battery powering the monitor.

2. A system as set forth in claim 1, wherein the characteristic is rotational speed.

3. A system as set forth in claim 1, wherein the characteristic is vibration.

4. A system as set forth in claim 1, wherein the characteristic is temperature.

5. A system as set forth in claim 1, wherein the first signal includes speed, vibration, and temperature signals.

6. A system as set forth in claim 1, further comprising a warning device in communication with the monitor for generating a warning signal responsive to the first signal.

7. A system as set forth in claim 6, wherein the warning device is an aural device.

8. A system as set forth in claim 6, wherein the warning device is a visual device.

9. A system as set forth in claim 1, wherein the battery is disposed within the monitor, the monitor being removably securable proximate the dynamic member.

10. A system as set forth in claim 1, wherein the battery is disposed proximate the monitor, the battery being removably securable proximate the dynamic member.

11. A system as set forth in claim 1, wherein the dynamic member is rotatable, the system further comprising a bearing apparatus defining a housing, an outer ring, and an inner ring such that the outer ring rotates relative to and the inner ring rotates with the rotatable member, the housing and the outer ring supporting the inner ring, the sensor device being secured to the housing.

12. A system as set forth in claim 11, wherein the bearing apparatus includes:

a tapered adapter disposed about the rotatable member, the adapter including a tapered portion and an external threaded portion;

the inner ring defining a tapered inner surface disposed about the tapered portion of the adapter; and

an adapter nut disposed to engage the threaded portion of the tapered adapter to clamp the bearing apparatus to the rotatable member.

13. A system as set forth in claim 1, further including a signal generating device attached to the rotatable member, the signal generating device cooperating with the sensor device to generate the first signal.

14. A system as set forth in claim 13, wherein the signal generating device is an adapter nut utilized to secure the rotatable member to a rotatable portion of a housing in which the rotatable member rotates.

15. A system as set forth in claim 13, wherein the signal generating device defines a plurality of slots spaced about a circumference thereof.

16. A system as set forth in claim 13, wherein the signal generating device defines a plurality of holes spaced about a circumference thereof.

17. A system as set forth in claim 13, wherein the signal generating device defines a plurality of plug members spaced about a circumference thereof.

18. A system as set forth in claim 13, wherein the signal generating device defines a magnetic signature different from that of an area adjacent the signal generating device.

19. A system as set forth in claim 1, wherein the sensor device is situated in an axial sensing direction with respect to the dynamic member.

20. A system as set forth in claim 1, wherein the sensor device is situated in a radial sensing direction with respect to the dynamic member.

21. A system as set forth in claim 1, wherein the sensor device is a magnetic sensor.

22. A system as set forth in claim 21, wherein the magnetic sensor is a reluctance sensor.

23. A system for monitoring a rotatable member rotatably mounted within a housing, the system comprising:

an adapter nut secured to the rotatable member to rotatably mount the rotatable member within the housing;

a sensor operative to sense a rate of rotation of the rotatable member by sensing a rotation of the adapter nut and to generate an electrical signal in response to the sensed rotation;

a monitor in communication with the sensor for receiving and monitoring the electrical signal;

a battery in communication with and powering the monitor; and

a battery charging circuit in communication with the battery, the battery charging circuit being electrically connected to and powered by the electrical signal generated by the sensor, whereby the battery is recharged when the sensor generates the electrical signal.

24. A system as defined in claim 23, wherein the sensor is an encapsulated generator extending through the housing proximate the adapter nut.

25. A system as defined in claim 24, wherein the encapsulated generator includes a magnetic coil, and the battery charging circuit is disposed within the encapsulated generator.

26. A system as defined in claim 23, wherein the battery charging circuit includes a diode to generate single-pole current.

27. A system as defined in claim 23, wherein the battery charging circuit includes a full-wave rectifier to generate positive and negative current.

28. A system as defined in claim 23, wherein the monitor wirelessly transmits a second signal responsive to the electrical signal, the second signal indicative of the rate of rotation of the rotatable member.

29. A system as defined in claim 23, further including a warning device for producing a warning indicative of the rate of rotation of the rotatable member.

30. A method of remote monitoring of a dynamic member comprising:

sensing a characteristic of the dynamic member;

generating a first electrical signal in response to the sensed characteristic;

charging a battery via the first electrical signal; and

powering a transmitter with the battery to wirelessly transmit a second electrical signal responsive to the first signal to a remote location, the second signal indicative of the sensed characteristic.

31. The method of claim 30, further comprising providing a warning based on the second electrical signal.

32. The method of claim 30, wherein the sensed characteristic is rotational speed.

33. The method of claim 30, wherein the sensed characteristic is temperature.

34. The method of claim 30, wherein the sensed characteristic is vibration.

35. The method of claim 30, wherein the sensing step includes magnetically sensing a rotational speed using a coil and a magnet.

36. The method of claim 30, wherein the generating step includes magnetically generating the first electrical signal using a coil and a magnet.