Measuring Device Activated At Inspection Rounds For Condition Monitoring Of Rotating Machinery

• US 20070247285A1
• Filed: 11/24/2005
• Published: 10/25/2007
• Est. Priority Date: 11/24/2004
• Status: Active Grant

• Current Assignee: Electrotech AB
• Original Assignee: Electrotech AB
• Inventors: Rajala, Juha
• Granted Patent: US 7,796,051 B2
• Time in Patent Office: Days
• US Class Current: 340/10.100
• CPC Class Codes: F16C 2233/00 Monitoring condition, e.g. temperature, load, vibration
• CPC Class Codes: G01H 1/003 of rotating machines G01H1/10 takes precedence
• CPC Class Codes: G01M 13/028 Acoustic or vibration analysis
• CPC Class Codes: G06K 17/0022 arrangements or provisions for transferring data to distant stations, e.g. from a sensing device "transfer between computer elements G06F13/00 "; data-transmission H04L
• CPC Class Codes: G06K 19/0705 the battery being connected to a power saving arrangement
• CPC Class Codes: G06K 19/0717 the sensor being capable of sensing environmental conditions such as temperature history or pressure

Abstract

A measuring device (1) enables a handheld RFID receiver (20) to identify the measuring device (1), initiating measurements and receive measurement data relating to the condition of a rotating member of a machine. The measuring device (1) is intended to be mounted on the outside of a machine with at least one rotating member and the measuring device (1) is intended to measure and communicate measurement data relating to the condition of the rotating member. The device is energized and communicates by a magnetic field (21) introduced by the handheld receiver (20). The device (1) is suitable to be used for measurements at inspection rounds at industrial plants.

Claims

1. A measurement device (1) for measurement and communication of measurement data, intended to be mounted on the outside of a machine (31) comprising at least one rotating member and the measuring device (1) is intended to measure and communicate measurement data relating to the condition of the rotating member, characterized in that—

the measurement device (1) comprises a component for temperature measurement (3) and a component for vibration measurement (2),

the measurement device (1) comprises a first means (7) configured to activate temperature and vibration measurement, where the first means (7) are configured to be energized by an introduced magnetic field (21),

the measurement device (1) comprises a second means (4, 5) configured to communicate a unique identifier, data from the temperature measurement (3) and from the vibration measurement (2) to a handheld RFID receiver (20).

2. A measurement device (1) according to claim 1 characterized in that the second means (4, 5) is configured to communicate data from the temperature and vibration measurement by interacting with the introduced magnetic field (21).

3. A measurement device (1) according to claim 1 characterized in that the first means (7) is configured to handle data from vibration measurement mainly in the frequencies 1-1000 Hz and data from the vibration measurement communicates as a value relating to the total energy of vibration.

4. A measurement device (1) according to claim 2 characterized in that the measurement device further comprises an accelerometer (2) and that the first means comprises a processor (7) covered in a protective non-conductive material.

5. A measurement device (1) according to claim 4 characterized in that the second means (4, 5) comprises a coil (4) which is positioned around the accelerometer (2) and the processor (7).

6. A measurement device (1) according to claim 1 characterized in that the component for temperature measurement is connected to a ring shaped electrically conductive detail (8), where the detail is intended to be attached to the machine (31) by means of a screw.

7. A measurement device (1) according to claim 1 characterized in that the measurement device (1) does not use energy from a battery or from by means of a wired electric connection, to communicate measurement data.

8. A measurement device (1) according to claim 1 characterized in that the temperature and vibration measurement is intended to be performed while the magnetic field (21) is introduced to the measurement device (1), and not otherwise.

14. A system according to claim 1 characterized in that the component for temperature measurement is connected to a ring shaped electrically conductive detail (8), where the detail is intended to be attached to the machine (31) by means of a screw.

15. A system according to claim 1 characterized in that component for temperature measurement is connected to a ring shaped electrically conductive detail (8), where the detail is intended to be attached to the machine (31) by means of a screw.

16. A system according to claim 1 characterized in that the measurement device (1) does not use energy from a battery or from by means of a wired electric connection, to communicate measurement data.

17. A system according to claim 1 characterized in that the temperature and vibration measurement is intended to be performed while the magnetic field (21) is introduced to the measurement device (1), and not otherwise.

18. A measurement device (1) according to claim 2 characterized in that the first means (7) is configured to handle data from vibration measurement mainly in the frequencies 1-1000 Hz and data from the vibration measurement communicates as a value relating to the total energy of vibration.

19. A measurement device (1) according to claim 3 characterized in that the measurement device further comprises an accelerometer (2) and that the first means comprises a processor (7) covered in a protective non-conductive material.

20. A measurement device (1) according to claim 2 characterized in that the component for temperature measurement is connected to a ring shaped electrically conductive detail (8), where the detail is intended to be attached to the machine (31) by means of a screw.

9. A system (65) to detect deviations from a normal condition relating to at least one rotating member of a machine (31) and measurements relating to the condition is intended to be initiated by a user (32) at inspection rounds at a plant, the system comprising:

a transponder (1) intended to be attached on the outside of the machine (31), the transponder comprises components for temperature and vibration measurement (2, 3), the transponder (1) further comprises a first means (7) configured to activate temperature and vibration measurement by means of energy from an introduced magnetic field (21), a handheld RFID receiver (20) configured to introduce the magnetic field (21), the handheld RFID receiver (20) comprises communication means (62) configured to communicate with a second means (5) in the transponder (1) by means of the magnetic field (21), the RFID receiver comprises means to store the temperature and vibration measurement associated with an identity (66) of the transponder, the handheld receiver (20) comprises means to read the identity of the transponder (1),—

a computer (64) comprising connection means configured to communicate with the handheld receiver (20), and the computer (64) comprises presentation means suitable for trend curves intended to indicate deviations from the normal condition relating to the at least one rotating member of the machine (31), where the indicated deviation is based on temperature and vibration measurement performed by the transponder (1) at a number of times.

10. A system according to claim 9 characterized in that the second means (5) is configured to communicate data from temperature and vibration measurement by interacting the introduced magnetic field (21).

11. A system according to claim 9 characterized in that the first means is configured to handle data from the vibration measurement mainly in the frequencies 1-1000 Hz and that data of the vibration measurement is sent as one value relating to the total energy of vibrations.

12. A system according to claim 10 characterized in that the transponder (1) further comprises an accelerometer (2) and the first means comprises a processor (7) covered in a protective non-conductive material.

13. A system according to claim 12 characterized in that the second means (4, 5) comprises a coil (4) which is positioned around the accelerometer (2) and the processor (7).