Measuring device activated at inspection rounds for condition monitoring of rotating machinery

• US 7,796,051 B2
• Filed: 11/24/2005
• Issued: 09/14/2010
• Est. Priority Date: 11/24/2004
• Status: Expired due to Fees

• Current Assignee: Electrotech AB
• Original Assignee: Electrotech AB
• Inventors: Rajala, Juha
• Primary Examiner(s): Wu; Daniel
• Assistant Examiner(s): SMALL, NAOMI J
• Application Number:
  US11/791,477
• Publication Number:
  US 20070247285A1
• Time in Patent Office: 1,755 Days
• Field of Search: 340/683
• US Class Current: 340/683
• 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, the measurement device (1) comprising:

a component for temperature measurement (3) and a component for vibration measurement (2) in at least the frequencies 1-1000 Hz,

first means (7) configured to activate the components for temperature and vibration measurement, the first means (7) being configured to be energized by an introduced magnetic field (21) and to process vibration measurement data from the component for vibration and communicate the vibration measurement data as one value related to total energy of vibration, and

second means (4, 5) configured to communicate a unique identifier, data from the temperature measurement and the value relating to the total energy of vibration to a handheld RFID receiver (20).

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

4. The measurement device (1) according to claim 3, wherein the second means (4, 5) comprises a coil (4) which is positioned around the accelerometer (2) and the processor (7) .

5. The measurement device (1) according to claim 1, wherein the component for temperature measurement is connected to a ring shaped electrically conductive detail (8), where the detail is adapted to be attached to the machine (31) by means of a screw.

6. The measurement device (1) according to claim 1, wherein the measurement device (1) does not use energy from a battery or from a wired electric connection, to communicate measurement data.

7. The measurement device (1) according to claim 1, wherein the temperature and vibration measurement is performed while the magnetic field (21) is introduced to the measurement device (1), and not otherwise.

16. The measurement device (1) according to claim 2, wherein 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.

8. 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.

9. The system according to claim 8, wherein the second means (5) is configured to communicate data from temperature and vibration measurement by interacting with the introduced magnetic field (21).

10. The system according to claim 8, wherein the first means is configured to process data from the vibration measurement in at least the frequencies 1-1000 Hz and wherein data of the vibration measurement is sent as one value relating to the total energy of vibrations.

11. The system according to claim 9, wherein the transponder (1) further comprises an accelerometer (2) and the first means comprises a processor (7) covered in a protective non-conductive material.

12. The system according to claim 11, wherein the second means (4, 5) comprises a coil (4) which is positioned around the accelerometer (2) and the processor (7).

13. The system according to claim 8, wherein the component for temperature measurement is connected to a ring shaped electrically conductive detail (8), where the detail is adapted to be attached to the machine (31) by means of a screw.

14. The system according to claim 8, wherein the measurement device (1) does not use energy from a battery or from a wired electric connection, to communicate measurement data.

15. The system according to claim 8, wherein the temperature and vibration measurement is performed while the magnetic field (21) is introduced to the measurement device (1), and not otherwise.