CN112525236A - Optical fiber sensor bearing assembly, bearing state monitoring system and measuring method - Google Patents

Optical fiber sensor bearing assembly, bearing state monitoring system and measuring method Download PDF

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Publication number
CN112525236A
CN112525236A CN201910827323.0A CN201910827323A CN112525236A CN 112525236 A CN112525236 A CN 112525236A CN 201910827323 A CN201910827323 A CN 201910827323A CN 112525236 A CN112525236 A CN 112525236A
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CN
China
Prior art keywords
fiber
optical fiber
bearing assembly
bearing
ring
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Pending
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CN201910827323.0A
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Chinese (zh)
Inventor
关冉
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Schaeffler Technologies AG and Co KG
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Schaeffler Technologies AG and Co KG
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Priority to CN201910827323.0A priority Critical patent/CN112525236A/en
Publication of CN112525236A publication Critical patent/CN112525236A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
    • G01D5/35338—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using other arrangements than interferometer arrangements
    • G01D5/35354—Sensor working in reflection
    • G01D5/35358—Sensor working in reflection using backscattering to detect the measured quantity
    • G01D5/35364—Sensor working in reflection using backscattering to detect the measured quantity using inelastic backscattering to detect the measured quantity, e.g. using Brillouin or Raman backscattering
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
    • G01D5/35338—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using other arrangements than interferometer arrangements
    • G01D5/35354—Sensor working in reflection
    • G01D5/35358—Sensor working in reflection using backscattering to detect the measured quantity
    • G01D5/35361—Sensor working in reflection using backscattering to detect the measured quantity using elastic backscattering to detect the measured quantity, e.g. using Rayleigh backscattering
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
    • G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/04—Bearings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/04—Bearings
    • G01M13/045—Acoustic or vibration analysis

Abstract

The invention relates to an optical fiber sensor bearing assembly, a bearing condition monitoring system and a method for measuring parameters related to the optical fiber sensor bearing assembly. The optical fiber sensor bearing assembly comprises a first bearing ring and a second bearing ring which can rotate relatively, the first bearing ring is provided with an annular groove extending along the circumferential direction of the first bearing ring, the assembly also comprises an optical fiber cable and at least two optical fiber coils, the optical fiber coils are jointly fixed in the annular groove along the extending direction of the annular groove, each optical fiber coil is used for measuring a corresponding parameter related to the optical fiber sensor bearing assembly, the optical fiber cable is positioned outside the annular groove and is simultaneously connected with each optical fiber coil so as to transmit the measuring signals of the optical fiber coils. The optical fiber sensor bearing assembly, the bearing state monitoring system and the measuring method can realize a highly integrated system structure.

Description

Optical fiber sensor bearing assembly, bearing state monitoring system and measuring method
Technical Field
The invention relates to the technical field of bearings. In particular, the invention relates to an optical fibre sensor bearing assembly, a bearing condition monitoring system and a corresponding measurement method.
Background
In various bearing application environments, it is often necessary to detect various physical parameters of the bearing, such as temperature, vibration, strain, and the like. Various sensors are used in the prior art to measure these parameters. Common temperature sensors include resistive, thermocouple, thermistor, and semiconductor temperature sensors, among others, which are typically mounted in radially extending bores in the bearing housing. A common vibration sensor includes an acceleration sensor, which is typically mounted in a bearing housing. These sensors are only aimed at a single target parameter, but in practice, a plurality of different parameters are usually obtained, which requires the installation of a plurality of independent sensors at the same time, making the system very complex and expensive.
For example, CN 105122025 a discloses a fiber optic sensor assembly, which forms an annular groove on the circumferential outer surface of a bearing ring, and clamps a fiber optic sensor in the groove by a clamping element, thereby measuring a certain parameter of a bearing by the fiber optic sensor. The optical fiber sensor preferably adopts a Bragg grating sensor, and the Bragg grating temperature sensor and the Bragg grating vibration sensor in the same system need to operate by using different wavelengths, so that the number of the sensors which can be installed is limited.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to provide an optical fiber sensor bearing assembly, a bearing condition monitoring system and a measuring method, which can realize a highly integrated architecture.
The above technical problem is solved by a fiber sensor bearing assembly according to the present invention. The optical fiber sensor bearing assembly comprises a first bearing ring and a second bearing ring, the first bearing ring and the second bearing ring are arranged along a rotation axis and can rotate relatively, the first bearing ring is provided with an annular groove extending along the circumferential direction of the first bearing ring, the optical fiber sensor bearing assembly further comprises an optical fiber cable and at least two optical fiber coils, the optical fiber coils are jointly fixed in the annular groove along the extending direction of the annular groove, each optical fiber coil is used for measuring a corresponding parameter related to the optical fiber sensor bearing assembly, the measured parameters of each optical fiber coil are different from each other, and the optical fiber cable is located outside the annular groove and is simultaneously connected with each optical fiber coil so as to transmit the measuring signals of the optical fiber coils. The prior art generally uses a single measuring device to measure a single physical quantity, each measuring device having a separate cable and mounting location; the optical fiber sensor bearing assembly uses a plurality of optical fibers to measure a plurality of (at least two) parameters respectively, the optical fibers are bundled or connected to the same cable after being led out, different measuring parameters have independent optical fibers, but different optical fibers share the same mounting structure (annular groove) and the same connecting cable, so that the high-integration effect is realized, the structure is greatly simplified, and the production cost is reduced.
According to a preferred embodiment of the invention, the first bearing ring is a stationary bearing ring and the second bearing ring is rotatable relative to the first bearing ring. The first bearing ring may be an outer ring or an inner ring, as long as the mounting position of the optical fiber coil is on the stationary bearing ring. This allows the fiber coil mounted on the first bearing ring to remain stationary with the first bearing ring, facilitating the wiring of the fiber coil with an external device.
According to another preferred embodiment of the present invention, the first bearing ring includes an annular main body portion and an annular optical fiber support ring fixed to an axial end portion of the main body portion, the annular groove being formed on an axial end face of the optical fiber support ring facing away from the main body portion. The grooves or holes used for installing the optical fiber coils in the prior art are generally formed directly on the body structure of the bearing ring, which may reduce the structural strength of the bearing ring itself. In the embodiment of the invention, the main body part of the bearing ring corresponds to the original bearing structure in the prior art, and the optical fiber support ring is additionally arranged on the axial end part of the bearing ring to form the annular groove for installing the optical fiber coil, so that the influence on the original function and structural strength of the bearing ring is avoided. In order to ensure the above effect, the optical fiber support ring is not overlapped with the second bearing ring in the axial direction. According to a further preferred embodiment, the optical fiber support ring may be a separate component from the body portion and fixedly attached to the body portion. Alternatively, the optical fiber support ring may also be integrally formed with the body portion of the bearing ring.
According to a further preferred embodiment of the invention, the optical fiber sensor bearing assembly further comprises a cover ring which is mounted in the annular groove with a form fit, pressing the optical fiber coils so that the optical fiber coils rest against the bottom of the annular groove, so that at least two optical fiber coils remain stationary relative to the annular groove of the optical fiber support ring and in turn relative to the first bearing ring. This ensures the accuracy of the fiber coil measurement effect.
According to another preferred embodiment of the invention, the parameters measured by the at least two fiber coils may comprise at least two of: temperature of the fiber optic sensor bearing assembly; vibration of the fiber optic sensor bearing assembly; and strain of the fiber optic sensor bearing assembly. The principle of measuring temperature is raman scattering, the principle of measuring vibration is rayleigh scattering, and the principle of measuring strain is brillouin scattering.
The above problems are also solved by a bearing condition monitoring system according to the present invention. The bearing condition monitoring system comprises the optical fiber sensor bearing assembly with the characteristics and a processor module, wherein the processor module is connected with an optical fiber cable of the optical fiber sensor bearing assembly.
According to a preferred embodiment of the present invention, the bearing condition monitoring system comprises a plurality of fiber optic sensor bearing assemblies that are connectable to a common fiber optic cable.
According to another preferred embodiment of the invention, the bearing condition monitoring system comprises a plurality of processor modules, each for processing a respective parameter.
The above problems are also solved by a method of measuring a parameter relating to a fibre-optic sensor bearing assembly according to the present invention. The optical fiber sensor bearing assembly includes a first bearing ring and a second bearing ring, the first bearing ring and the second bearing ring being arranged with a rotation axis and capable of relative rotation, the first bearing ring having an annular groove, the method may include the steps of: firstly, at least two optical fiber coils are jointly fixed in the annular groove along the extension direction of the annular groove, wherein each optical fiber coil is respectively used for measuring a corresponding parameter related to the optical fiber sensor bearing assembly, and the measured parameters of each optical fiber coil are different from each other; then, simultaneously connecting each of the at least two fiber coils to a fiber optic cable located outside the annular groove; the measurement signals of these fiber coils are then transmitted to a processor module via a fiber optic cable for processing the measurement signals.
According to a preferred embodiment of the invention, the method may further comprise at least two of: measuring a temperature of the fiber optic sensor bearing assembly based on the Raman scattering; measuring vibration of the optical fiber sensor bearing assembly based on Rayleigh scattering; and measuring the strain of the optical fiber sensor bearing assembly based on the brillouin scattering.
According to another preferred embodiment of the present invention, the method may further comprise: commonly connecting the fiber coils of the plurality of fiber optic sensor bearing assemblies to the same fiber optic cable; and distinguishing, by the processor module, signals from different fiber optic sensor bearing assemblies according to a send-receive spacing of signals transmitted in the fiber optic cable. The signal transmission distances between the plurality of optical fiber sensor bearing assemblies connected with the same optical fiber cable and the processor module are different, so that time intervals exist between the sending and the receiving of signals. By detecting the time interval, the optical fiber sensor bearing assembly to which the detection signal corresponds can be determined.
Drawings
The invention is further described below with reference to the accompanying drawings. Identical reference numbers in the figures denote functionally identical elements. Wherein:
FIG. 1a is a cross-sectional view of a fiber optic sensor bearing assembly according to an embodiment of the present invention;
FIG. 1b is an enlarged view of area A in FIG. 1; and
FIG. 2 is a schematic view of a bearing condition monitoring system according to an embodiment of the present invention.
Detailed Description
Embodiments of a fiber optic sensor bearing assembly, a bearing condition monitoring system, and a measurement method according to the present invention will be described below with reference to the accompanying drawings. The following detailed description and drawings are included to illustrate the principles of the invention, which is not to be limited to the preferred embodiments described, but is to be defined by the appended claims.
According to one embodiment of the present invention, a fiber optic sensor bearing assembly is provided. Referring to fig. 1a and 1b, the optical fiber sensor bearing assembly 10 includes an inner race 15, an outer race 16, rollers 17, and a cage 18. The outer ring 16 is coaxially fitted over the radially outer side of the inner ring 15, a plurality of rollers 17 are uniformly arranged between the inner ring 15 and the outer ring 16 in the circumferential direction, and a cage 18 keeps the plurality of rollers 17 at uniform intervals in the circumferential direction. In the present embodiment, the outer ring 16 is a stationary component, while the inner ring 15 is rotatable relative to the outer ring 16 by means of rollers 17. The outer race 16 further includes an annular main body portion and a fiber support ring 11 disposed on an axial end portion of the main body portion. In the present embodiment, the optical fiber support ring 11 is a member independent from the main body portion of the outer ring 16, and may be fixedly mounted on the end face of the main body portion of the outer ring 16 by means of a snap ring or the like, and maintain good contact on the end face. On an axial end face of the main body portion of the optical fiber support ring 11 facing away from the outer ring 16, an annular groove 19 extending along the circumferential direction of the end face is formed. At least two fiber coils 12 are arranged in the annular groove 19 along the extension direction thereof. The cover ring 13, which is complementary in shape to the annular groove 19, is fixedly mounted in the annular groove 19, pressing the optical fiber coils 12 against the bottom of the annular groove 19, so that the optical fiber coils 12 are held in good direct contact with the optical fiber support ring 11 (and thus the outer ring 16) and are relatively fixed. The input and output ends of all the fiber coils 12 are connected to the same fiber optic cable 14. The fiber optic cable 14 is located outside the fiber optic support ring 11 for transmitting the measurement signal of the fiber optic coil 12. The other end of the fiber optic cable 14 may be connected to various processors that process the measurement signals.
Each of these fiber coils 12 is used to measure a parameter relating to the bearing. The parameters measured by the different fiber coils 12 also differ. These parameters may include at least: temperature, vibration and strain. The fiber coil 12 may measure the temperature of the bearing based on raman scattering, the vibration of the bearing based on rayleigh scattering, or the strain of the bearing based on brillouin scattering. Other parameters that can be measured through the optical fiber are also possible. The above measurement principles are known in the art and will not be described in further detail herein. Each fiber coil 12 is preferably over 1 meter in length and can be wound in the annular groove 19 multiple turns, so that the signal strength is greater, interference around is avoided, multiple measurement points are better distinguished, and measurement accuracy is ensured. Arranging a plurality of fiber coils 12 for measuring different parameters in the same annular groove 19 and connected to the same fiber cable 14 allows the fiber sensor bearing assembly 10 to achieve a high degree of integration, greatly simplifying construction and reducing costs.
Since the optical fiber support ring 11 is a component attached to the main portion of the outer ring 16, the main portion of the outer ring 16 corresponds to the outer ring of the prior art when the bearing is in operation, and therefore, the annular groove 19 of the optical fiber support ring 11 does not affect the normal function of the outer ring 16 and does not reduce the structural strength thereof. Alternatively, the fiber support ring 11 may be formed integrally with the main body portion of the outer ring 16. In both cases, it is possible to make the position of the optical fiber support ring 11 in the axial direction not overlap with the inner ring 15, thereby ensuring that the optical fiber support ring 11 does not affect the normal function of the outer ring 16 or reduce its structural strength. Preferably, the outer diameter dimension of the optical fiber support ring 11 is smaller than the outer diameter dimension of the main body portion of the outer ring 16, so that the optical fiber support ring 11 does not enter the region radially outside the outer ring 16 to interfere with the installation of other components.
The reason why the optical fiber support ring 11 is mounted on the outer ring 16 is mainly because the outer ring 16 is a stationary component in this embodiment, and the optical fiber coil 12 on the optical fiber support ring 11 is kept stationary along with the outer ring 16, so as to facilitate the connection of the optical fiber coil 12 with the external optical fiber cable 14. The optical fiber support ring 11 may also be disposed on the end of the inner ring 15 when the outer ring 16 rotates and the inner ring 15 is stationary. In this case, the inner diameter dimension of the optical fiber support ring 11 is preferably larger than the inner diameter dimension of the main body portion of the inner ring 15 so that the optical fiber support ring 11 does not enter the region radially inside the inner ring 15 to interfere with the mounting of other components.
According to another embodiment of the invention, a bearing condition monitoring system based on the fiber sensor bearing assembly 10 is also provided. Referring to FIG. 2, a schematic diagram of the bearing condition monitoring system is shown. The bearing condition monitoring system may include one or more of the fiber optic sensor bearing assemblies 10 described above and a plurality of processor modules. The fiber optic sensor bearing assembly 10 is connected to these processor modules by fiber optic cables 14. The bearing condition monitoring system may measure multiple parameters about the bearing simultaneously, with a separate processor module for each parameter (which may be temperature, vibration, strain, etc. as described above). For example, a fiber temperature processor module 21 and a fiber vibration processor module 22 are exemplarily shown in FIG. 2. When there are multiple fiber optic sensor bearing assemblies 10 to be monitored in the bearing condition monitoring system, the fiber optic coils 12 of the multiple fiber optic sensor bearing assemblies 10 may be connected to a common fiber optic cable 14, and the fiber optic cable 14 may be connected to each processor module. If the number of fiber optic sensor bearing assemblies 10 is excessive, multiple fiber optic cables 14 may also be used to group the fiber optic sensor bearing assemblies 10. The bearing condition monitoring system may also include attenuators 30, the attenuators 30 being connected to each set of fiber optic sensor bearing assemblies 10 by the fiber optic cables 14 to attenuate the laser light emitted by the processor module and prevent the laser light from reflecting back into the processor module.
According to another embodiment of the invention, a measuring method based on the optical fiber sensor bearing assembly 10 and the bearing condition monitoring system is further provided. In the measurement method, one or more fiber optic sensor bearing assemblies 10 are connected by fiber optic cables 14 to a plurality of processor modules, each processing a respective bearing-related parameter. For example, the fiber temperature processor module 21 may measure the temperature of the bearing based on raman scattering, the fiber vibration processor module 22 may measure the vibration of the bearing based on rayleigh scattering, and the fiber strain processor module may measure the strain of the bearing based on brillouin scattering. Each processor module first emits a laser pulse that is transmitted through the fiber optic cable 14 into the fiber optic coil 12 of the respective fiber optic sensor bearing assembly 10. When the laser light reaches the fiber coil 12, various scattered lights (for example, stokes raman scattered light and anti-stokes raman scattered light and rayleigh scattered light) are generated in the fiber coil 12. These scattered light is transmitted back through the fiber optic cable 14 into the respective processor module, which may measure the respective bearing parameter by detecting the scattered light. Scattered light signals from different fiber sensor bearing assemblies 10 on the same fiber optic cable 14 can be distinguished by the time interval between the emission of a laser pulse and the receipt of the scattered light, thereby determining the fiber sensor bearing assembly 10 to which the measurement signal corresponds. Through the time division multiplexing technology, the laser from the processor module can be transmitted to each optical fiber cable one by one, so that the monitoring capability of the system can be further improved.
Although possible embodiments have been described by way of example in the above description, it should be understood that numerous embodiment variations exist, still by way of combination of all technical features and embodiments that are known and that are obvious to a person skilled in the art. It should also be appreciated that the exemplary embodiment or exemplary embodiments are only examples, and are not intended to limit the scope, applicability, or configuration of the invention in any way. From the foregoing description, one of ordinary skill in the art will more particularly provide a technical guide to convert at least one exemplary embodiment, wherein various changes may be made, particularly in matters of function and structure of the components described, without departing from the scope of the following claims.
List of reference numerals
10 optical fiber sensor bearing assembly
11 optical fiber support ring
12 optical fiber coil
13 cover ring
14 optical fiber cable
15 inner ring
16 outer ring
17 roller
18 holder
19 annular groove
21 optical fiber temperature processor module
22 optical fiber vibration processor module
30 attenuator

Claims (13)

1. A fiber optic sensor bearing assembly (10) comprising first and second bearing rings arranged with a rotational axis and capable of relative rotation,
it is characterized in that the preparation method is characterized in that,
the first bearing ring has an annular groove (19) extending along the circumferential direction of the first bearing ring, the fiber-optic sensor bearing assembly (10) further comprises a fiber-optic cable (14) and at least two fiber-optic coils (12), the at least two fiber-optic coils (12) are jointly fixed in the annular groove (19) along the extension direction of the annular groove (19), each fiber-optic coil (12) is used for measuring a corresponding parameter related to the fiber-optic sensor bearing assembly (10), the measured parameters of each fiber-optic coil (12) are different from each other, the fiber-optic cable (14) is located outside the annular groove (19) and is simultaneously connected with each of the at least two fiber-optic coils (12) so as to transmit the measuring signals of the at least two fiber-optic coils (12).
2. The fiber optic sensor bearing assembly (10) of claim 1, wherein the first bearing ring is a stationary bearing ring and the second bearing ring is rotatable relative to the first bearing ring.
3. The optical fiber sensor bearing assembly (10) of claim 1, characterized in that the first bearing ring comprises an annular main body portion and an annular optical fiber support ring (11), the optical fiber support ring (11) being fixed on an axial end of the main body portion, the annular groove (19) being formed on an axial end face of the optical fiber support ring (11) facing away from the main body portion.
4. The optical fiber sensor bearing assembly (10) of claim 3, characterized in that the optical fiber support ring (11) is positioned in the axial direction without overlapping the second bearing ring.
5. The fiber optic sensor bearing assembly (10) of claim 3, wherein the fiber support ring (11) is a separate component from the body portion and is fixedly attached thereto.
6. The fiber optic sensor bearing assembly (10) of claim 1, wherein the fiber optic sensor bearing assembly (10) further comprises a cover ring (13), the cover ring (13) being form-fittingly mounted in the annular groove (19) to secure the at least two fiber optic coils (12) in the annular groove (19).
7. Fiber optic sensor bearing assembly (10) according to one of claims 1 to 6, characterized in that the parameters measured by the at least two fiber optic coils (12) comprise at least two of:
a temperature of the fiber optic sensor bearing assembly (10);
vibration of the fiber optic sensor bearing assembly (10); and
strain of the fiber optic sensor bearing assembly (10).
8. A bearing condition monitoring system comprising a fibre-optic sensor bearing assembly (10) according to one of claims 1 to 7 and a processor module (21, 22), the processor module (21, 22) being connected to the fibre-optic cable (14) of the fibre-optic sensor bearing assembly (10).
9. The bearing condition monitoring system according to claim 8, characterized in that it comprises a plurality of said fiber optic sensor bearing assemblies (10) connected by said fiber optic cable (14).
10. A bearing condition monitoring system according to claim 8 or 9, characterized in that the bearing condition monitoring system comprises a plurality of said processor modules (21, 22), each of said processor modules (21, 22) being adapted to process a respective parameter.
11. A method of measuring a parameter in relation to a fibre-optic sensor bearing assembly (10), the fibre-optic sensor bearing assembly (10) comprising a first bearing ring and a second bearing ring, the first bearing ring and the second bearing ring being arranged on the same rotational axis and being relatively rotatable, the first bearing ring having an annular groove (19) extending in the circumferential direction of the first bearing ring, characterized in that the method comprises:
-jointly fixing at least two fiber coils (12) in the annular groove (19) along the extension direction of the annular groove (19), wherein each fiber coil (12) is used for measuring a corresponding parameter related to the fiber sensor bearing assembly (10), and the measured parameters of each fiber coil (12) are different from each other;
simultaneously connecting each of the at least two fiber optic coils (12) to a fiber optic cable (14) located outside the annular groove (19);
transmitting the measurement signals of the at least two fiber optic coils (12) to a processor module (21, 22) through the fiber optic cable (14) for processing the measurement signals.
12. The method of claim 11, comprising at least two of:
measuring a temperature of the fiber optic sensor bearing assembly (10) based on Raman scattering;
measuring vibrations of the fiber optic sensor bearing assembly (10) based on Rayleigh scattering; and
measuring strain of the optical fiber sensor bearing assembly (10) based on Brillouin scattering.
13. The method according to claim 11 or 12, characterized in that the method further comprises:
commonly connecting the fiber optic coils (12) of a plurality of the fiber optic sensor bearing assemblies (10) to the same fiber optic cable (14); and
differentiating, by the processor module (21, 22), signals from different fiber optic sensor bearing assemblies (10) according to a send-receive spacing of signals transmitted in the fiber optic cable (14).
CN201910827323.0A 2019-09-03 2019-09-03 Optical fiber sensor bearing assembly, bearing state monitoring system and measuring method Pending CN112525236A (en)

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CN201910827323.0A CN112525236A (en) 2019-09-03 2019-09-03 Optical fiber sensor bearing assembly, bearing state monitoring system and measuring method

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Application Number Priority Date Filing Date Title
CN201910827323.0A CN112525236A (en) 2019-09-03 2019-09-03 Optical fiber sensor bearing assembly, bearing state monitoring system and measuring method

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CN109781408A (en) * 2019-01-29 2019-05-21 大连工业大学 Rolling bearing retainer multiple physical field dynamic parametric test device
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CN1712917A (en) * 2005-07-28 2005-12-28 北京航空航天大学 Multi-channel optical fiber temperature sensor
DE102006035703A1 (en) * 2006-08-01 2008-02-07 Schaeffler Kg Device for monitoring at least one operating variable of a wheelset bearing
EP2046620A1 (en) * 2006-08-01 2009-04-15 Schaeffler KG Device for monitoring at least one operating variable of a wheel set bearing
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CN109781408A (en) * 2019-01-29 2019-05-21 大连工业大学 Rolling bearing retainer multiple physical field dynamic parametric test device
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