Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
  • H02N11/00—Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
  • H02N11/002—Generators
• • 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
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
  • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
  • H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C2326/00—Articles relating to transporting
  • F16C2326/01—Parts of vehicles in general
  • F16C2326/02—Wheel hubs or castors
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such

Definitions

• the invention relates to a method of supplying electrical power to at least one active component of an autonomous electronic system forming part of an assembly comprising a rolling bearing, as well as such an assembly.
• the invention aims in particular to solve the problems mentioned above by proposing a method and an assembly that makes it possible to use a source of energy specific to said assembly for supplying an active component electrically, and this by improving the modularity of the solution. mechanical and electrical integration constraints.
• the invention proposes a method of supplying electrical power to at least one active component of an autonomous electronic system forming part of a mounting comprising a rolling bearing, said mounting comprising at least an area having variations of at least one state during rotation of the bearing, said method providing:
• the invention proposes a mounting comprising a rolling bearing and an autonomous electronic system comprising at least one active component, said mounting comprising at least one zone having variations of at least one state during rotation of the bearing.
• said arrangement being characterized in that said zone is equipped with a substrate which comprises means for converting said variations into an electrical signal
• said electronic system being mounted on the substrate with the active component in electrical communication with the conversion means by means of intermediate of an operating device of the electrical signal which is integrated in said system, said operating device being arranged to transform the electrical signal into the current necessary for the power supply of the active component.
• FIG. 1 is a schematic view of an assembly comprising a bearing, the outer ring is equipped with a substrate on which an electronic system is mounted so as to supply electricity to an active component of said system;
• FIG. 2 is a perspective view of a mounting comprising a motor vehicle wheel bearing, the outer ring of said bearing being equipped according to Figure 1.
• the bearing comprises a fixed outer ring 1, a rotating inner ring 2 and rolling bodies arranged in a known manner between said rings to allow relative rotation of the rings 1, 2.
• the fixed ring 1 comprises a flange 5 provided with four projections 5a disposed substantially at 90 ° from each other, in each of which a hole 6 for attachment to the frame is formed.
• the flange 5 undergoes significant mechanical stresses which induce a deformation thereof.
• the periodic passage of the rolling bodies induces periodic local deformations of the outer ring 1 and therefore that of the flange 5.
• the invention proposes to use these periodic local deformations for supplying at least one active component of an electronic system 8 forming part of the assembly.
• other areas of the mounting having mechanical deformations or variations of another state, such as mounting vibrations or temperature, can be used to generate electrical energy.
• the rotating inner ring can be equipped according to the invention.
• the active component may be formed of at least one sensor of an operating parameter of the assembly, such as a sensor of vibration, position, speed, temperature, humidity, wear.
• At least one active identification component can be provided, such as an RFID radio frequency tag in which information concerning the assembly or its environment can be written and / or read.
• the electronic system 8 is autonomous in electricity so in particular to overcome any wired connection between the mounting and the environment outside thereof. Thus, the operation of the electronic system 8 does not interfere with that of the assembly.
• the invention provides to equip the flange 5 with a substrate 9 comprising means 10 for converting the deformations into an electrical signal.
• the means 10 are arranged, particularly with regard to their geometry and / or their arrangement on the zone, to provide sufficient electrical energy for the supply of the active component.
• This adaptation of the conversion means is in particular a function of the characteristics of the deformations, those of the zone and conditions of use of the assembly, so as to provide sufficient electrical power.
• an operating device which is arranged to transform the electrical signal into the current necessary for the power supply of the active component is integrated into the electronic system 8.
• the operating device allows the shaping of the electrical signal and adapting it to active component.
• the integration of the operating device in the electronic system 8 makes it possible to satisfactorily meet the assembly and standardization constraints, in particular because it does not provide for the implementation of a separate electronic system for the generation of electronic devices. 'electric energy.
• the electronic system 8 is intended to mount the electronic system 8 on the substrate 9 by making the active component in electrical communication with the conversion means via the operating device so as to supply said active component with the current electric.
• the electronic system 8 being mounted on the substrate 9, the integration of said system in the assembly is simplified. Furthermore, it is possible to configure the substrate 9 so that it has mechanical protection characteristics of the electronic system 8 during operation of the assembly. Indeed, the substrate 9 acts as an interface between the electronic system 8 and the mounting area.
• the conversion means 10 are based on a piezoelectric material.
• the conversion means 10 may be based on a thermoelectric material.
• the substrate 9 is formed of a plate of material, for example ceramic, which is associated on a side face of the flange 5, for example by gluing or the like.
• the zone equipped with the substrate is chosen to present significant deformations, for example between two first projections 5a.
• the substrate comprises a coating formed of a discrete network of the piezoelectric material, for example polymeric material.
• This embodiment makes it possible to locate the energy conversion on areas of the substrate where the amplitudes of the periodic deformations are maximum, for example by optimizing the arrangement of the piezoelectric material.
• the substrate 9 has a function of transmission of the deformations which can be optimized, so for example to concentrate said deformations at the piezoelectric material.
• a continuous coating may be provided or the substrate may be made directly of piezoelectric material, for example of the ceramic type.
• the shape, the surface and the thickness of the piezoelectric material can be adapted, in particular according to the characteristics of the periodic deformations, to provide sufficient electrical power to supply electricity to the active component.
• the recoverable power is of the order of 300 ⁇ W / cm 3 by piezoelectric effect and of the order of 40 ⁇ W / cm 3 by Peltier effect.
• the piezoelectric conversion means 10 are devoid of seismic mass, which facilitates their integration into the assembly.
• the electronic system 8 is for example in the form of an electronic microsystem or a microelectromechanical system (MEMS) which integrates an operating device for example formed of an electronic circuit known to those skilled in the art.
• MEMS microelectromechanical system
• This type of system 8 has the advantage of being able to integrate several functions in a small footprint, by ensuring a protection of electronic components.
• it can be connected in a standardized manner, for example by means of projected connecting lugs protruding from the packaging box.
• the electronic system 8 can integrate at least one of the means chosen from the group comprising:
• storage and energy management means for example in the form of a rechargeable battery
• radio communication means with the active component; for example comprising a radio frequency transmitter low consumption integrated antenna which allows communication between the active component and an external central reception and signal processing.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)

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Publications (1)

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• 2005
  • 2005-08-23 FR FR0508680A patent/FR2890256B1/fr not_active Expired - Fee Related
• 2006
  • 2006-08-04 EP EP06794296A patent/EP1917514A1/de not_active Withdrawn
  • 2006-08-04 WO PCT/FR2006/001910 patent/WO2007023214A1/fr active Application Filing
  • 2006-08-04 JP JP2008527481A patent/JP2009506737A/ja not_active Withdrawn
  • 2006-08-08 US US12/064,545 patent/US20080231250A1/en not_active Abandoned

Non-Patent Citations (1)

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