WO2012028453A1 - Module d'alimentation en énergie piézoélectrique hautement intégré - Google Patents

Module d'alimentation en énergie piézoélectrique hautement intégré Download PDF

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Publication number
WO2012028453A1
WO2012028453A1 PCT/EP2011/064101 EP2011064101W WO2012028453A1 WO 2012028453 A1 WO2012028453 A1 WO 2012028453A1 EP 2011064101 W EP2011064101 W EP 2011064101W WO 2012028453 A1 WO2012028453 A1 WO 2012028453A1
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WO
WIPO (PCT)
Prior art keywords
energy
piezoelectric element
ees
piezoelectric
generation system
Prior art date
Application number
PCT/EP2011/064101
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German (de)
English (en)
Inventor
Alexander Frey
Ingo KÜHNE
Original Assignee
Siemens Aktiengesellschaft
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Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2012028453A1 publication Critical patent/WO2012028453A1/fr

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
    • B60C23/02—Signalling devices actuated by tyre pressure
    • B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
    • B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
    • B60C23/041—Means for supplying power to the signal- transmitting means on the wheel
    • B60C23/0411—Piezoelectric generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B81—MICROSTRUCTURAL TECHNOLOGY
    • B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
    • B81B3/00—Devices comprising flexible or deformable elements, e.g. comprising elastic tongues or membranes
    • B81B3/0018—Structures acting upon the moving or flexible element for transforming energy into mechanical movement or vice versa, i.e. actuators, sensors, generators
    • B81B3/0021—Transducers for transforming electrical into mechanical energy or vice versa
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/30—Piezoelectric or electrostrictive devices with mechanical input and electrical output, e.g. functioning as generators or sensors
    • H10N30/304—Beam type
    • H10N30/306—Cantilevers

Definitions

  • the invention relates to a power generation system, in particular formed as an integrated miniaturized Energyer ⁇ generating system. Furthermore, the invention relates to a method for providing energy for energy self-sufficient systems. Actuators and sensors based on MEMS (Micro Electro mechanization cal Systems) technology, are increasingly being incorporated is ⁇ . Actuator are particularly interesting here or sensor ⁇ nodes and networks that work energy self-sufficient. Such systems do not obtain the electrical energy necessary for the operation of individual components from a mains supply or a battery but via a suitable energy converter from the environment.
  • MEMS Micro Electro mechanization cal Systems
  • the time required for the operation of the Rei ⁇ Pressure Monitoring power is supplied from a battery.
  • the battery limits the life of the tire pressure monitoring system.
  • the object of the present invention is to provide a miniaturized power generation system which enables a self-sufficient power supply and control for decentralized systems, in particular in the industrial environment or in vehicle technology.
  • a power generation system in particular designed as an integrated miniaturized power generation system, comprising:
  • a mechanical force can be coupled in such a way by the first excitation means to the piezoelectric element that the piezoelectric element is excited ⁇ specific to mechanical vibrations
  • an integrated circuit for energy management ⁇ ment of the energy provided by the piezoelectric energy converter.
  • ASIC integrated circuit
  • the nature of the conversion of mechanical energy into electrical energy as described can be incorporated anywhere ⁇ sets, where a mechanical force to the mechanical ⁇ An excitation of the piezoelectric element can be tapped. This can be done, for example, by using kinetic energy or by deformation processes in the surrounding infrastructure. For example, in conveyor belts, at the reversal points of the elastic conveyor belt is deformed or in the Indust ⁇ rieautomatmaschine (eg robot), where there are many moving parts that are protected, for example, by mechanically deformable rubber ⁇ cuffs. But even a tire gossip is usable as a mechanically deformable environment.
  • the miniaturization of the power generation system according to the invention is based on a MEMS piezoelectric generator and the realization of the interface circuit as an ASIC.
  • MEMS typical layer thicknesses in the range of typically 1 ⁇ - ⁇ allow a compact design of the generator.
  • the power generation system comprises an energy storage element for storing the electrical energy generated by the piezoelectric energy converter.
  • the energy Memory element may be formed, for example, as a double-layer capacitor (gold cap).
  • a double-layer capacitor combines speed and large energy storage to form a supercapacitor.
  • a double-layer capacitor is particularly small despite its high capacity. The dielectric strength is not very high. It is at a few volts.
  • the double layer capacitor ⁇ (gold cap) is suitable because of its high capacity and particularly bridging power supply. In devices or applications in which data is to be retained when switched off, it is thus particularly suitable.
  • the power generation system comprises an energy interface to external consumers. Characterized in particular remotely located consumer (eg Snsoren, Ak ⁇ factors) are independently powered, without further Ver ⁇ cabling.
  • the power generation system further comprises a second housing part with second excitation means, wherein the second housing part is movably arranged on the first hous ⁇ part such that by translational movements of the second housing part, substantially in the direction of the first Excitation means, the first excitation means are mechanically driven by the second excitation means.
  • a further advantageous embodiment of the invention is that the first housing part has elements for the defined mechanical guidance of the second housing part. There- by the kinetic energy of the second housing part can de finiert ⁇ and be purposefully used for the excitation of the piezoelectric element ⁇ rule.
  • a further advantageous embodiment of the invention is that between the first and the second housing part spring elements are mounted, which lead to a restoring force upon deflection of the second housing part. As a result, a periodic excitation of the piezoelectric element is possible.
  • a further advantageous embodiment of the invention is that the piezoelectric element has a multilayer ⁇ construction with MEMS layers (ie in Micro Electro Mechanical Systems - technology).
  • the piezoelectric element has a layer sequence of electrode layer, piezoelectric ⁇ shear layer and further electrode layer.
  • a plurality of such layer sequences can be stacked on top of each other, so that a multi-layer structure with stacked, alternately arranged electrode layers and piezoelectric layers results.
  • the electrode material of the electrode layers can consist of various metals or metal alloys. Examples of the electrode material are platinum, titanium and a platinum / titanium alloy. Also conceivable are non-metallic, electrically conductive materials.
  • the piezoelectric layer may also consist of different materials ⁇ lichsten. Examples include piezoelectric ceramic materials such as lead zirconate titanate (PZT), zinc oxide (ZnO) and aluminum nitride (A1N). Piezoelectrical organic materials such as polyvinylidene difluoride
  • PVDF polytetrafluoroethylene
  • PTFE polytetrafluoroethylene
  • the piezoelectric element is formed as a piezoelectric flag from ⁇ .
  • the piezoelectric element is formed as a bending element, preferably as a piezo-flag.
  • the bending element is, for example, a piezoelectric Bie ⁇ gauge.
  • ceramic green sheets printed with a metallization for the electrode layers are stacked on top of one another and sintered. The result is a monolithic bending transducer.
  • the bending transducer can be configured as desired, example ⁇ as bimorph.
  • MEMS technology is particularly suitable for realizing the bending transducer.
  • a piezoelectric energy converter with very small lateral dimensions is available.
  • very thin layers can be formed.
  • the layer thicknesses of the electrode layers are 0.1 ⁇ m to 0.5 ⁇ m.
  • the piezoelectric element is designed as a thin piezoelectric diaphragm or beam.
  • the piezoelectric ele ⁇ ment has a very low mass. In addition, such a piezoelectric element can easily become mechanical
  • a carrier layer may be provided, for example a carrier layer of silicon, polysilicon, silicon dioxide (SiO 2) or silicon nitride (Si 3 N 4).
  • a layer thickness of the carrier layer is selected from the range of 1 ⁇ to 100 ⁇ .
  • the carrier layer is optional.
  • a further advantageous embodiment of the invention is that the piezoelectric element has a substantially triangular surface. This causes a high efficiency in the energy conversion.
  • a further advantageous embodiment of the invention is that the first excitation means is designed as a rigid mechanical shear ⁇ driver which is driven by a Anlenkdorn the second excitation means.
  • Rigid mecha ⁇ African driver can be realized as a simple Frontalmit six example.
  • a further advantageous embodiment of the invention is that the first excitation means is designed as a semiflexible with ⁇ participants, which collapses in a first direction of movement, when it acts mechanically on the piezoelectric element mecha ⁇ nically, so that the piezoelectric element in the first direction of movement of the driver is essentially not deflected, and wherein in a second direction of movement, which is substantially opposite to the first direction of movement, the semi-flexible driver deflects the piezoelectric element in a contacting, wherein the semi-flexible carrier is driven by a Anlenkdorn the second excitation means.
  • This is a robust concept (with regard to the reproducibility and stability of the deflection process), which also has no limitation with respect to natural frequency and deflection duration.
  • the piezoelectric bar In the forward movement of the driver works on, so that the piezo beam (or the piezo flag) is practically not deflected. In the reverse movement, with ⁇ participants is so reinforced that the piezoelectric bar is carried. After reaching a certain Auslenkwegs in the backward movement, which is set exactly determinable over the geometry ratios, the piezoelectric bar is left free and can oscillate.
  • a further advantageous embodiment of the invention is that the integrated circuit (ASIC) is used for circuitsge ⁇ right energy management of energy self-sufficient sensors and / or actuators.
  • the integrated circuit (ASIC) for energy management of the energy provided by the piezoelectric energy converter allows a power supply adapted to the respective energy requirements of the decentralized system to be supplied. This allows the energy available to the consumer to be adjusted and maximized.
  • a further advantageous embodiment of the invention is that the piezoelectric element has an electrically passive carrier layer.
  • the carrier layer increases the me ⁇ chanische load capacity of the piezoelectric element and acts in electrical damping of the energy converter as me ⁇ chanischer energy storage. With electrical damping of the energy converter, the mechanical energy from the carrier ⁇ layer in a piezoelectric layer of the piezoelectric element continuously redistributed. Thus, the electrically passive carrier layer becomes a mechanical energy storage.
  • the object is further achieved by a method for converting mechanical energy into electrical energy using a power generation system according to one of claims 1 to 14 by acting on a piezoelectric element caused by mechanical ambient energy ⁇ mechanical force on a pie ⁇ zoelektharis element, so that the piezoelectric element is excited to mechanical vibrations and wherein the integrated circuit (ASIC), the amount of energy for a system is supplied as needed.
  • the demanded energy makes possible an optimal energy consumption adapted to the respective requirements. This increases the performance and Reliable ⁇ ness of the supplied remote systems (such as actuators, sensors).
  • FIG. 1 shows an exemplary schematic overview of the power generation system according to the invention
  • FIG 2 is an exemplary functional diagram for a Auslen ⁇ effect of a piezoelectric element by a periodic excitation
  • FIGS. 3a-3c show an exemplary vibration excitation of a piezo-beam generator by means of a linear translational movement and a suitable mechnan rigid driver
  • FIG 8a-8b exemplary acceleration graphs when passing through the tire contact area at different speeds Ge ⁇ .
  • a simple approach for obtaining energy from mechanical deformation by means of the piezoelectric effect is z.
  • Such systems ermögli ⁇ chen a self-sufficient power supply for decentrally mounted actuators and / or sensors. These systems are maintenance-free and do not require a battery change, which also has a positive environmental impact.
  • Layer thicknesses must be used acceleration masses of at least a few grams to allow a relevant deformation of the piezoelectric crystal and thus the provision of electric ⁇ shear energy.
  • the macroscopic layer thicknesses also lead (be long bending beam, in order for the mediated acceleration and mass force can be effective over a mög ⁇ lichst large lever on the piezo) in addition to the required mass to relatively large geometries. All in all, the miniaturization has narrow limits.
  • FIG. 1 shows an exemplary schematic overview screen of the power generation system EES according to the invention with a piezoelectric energy converter EWL for converting mechanical energy into electrical energy with at least one piezoelectric element PEl and a first housing part GTl, in which the piezoelectric element PEl is arranged ⁇ steerable at one end of and first excitation means AMI for mechanical excitation of the piezoelectric element PEl, wherein a mechanical force Bl can be by the first excitation means AMI in the piezoelekt ⁇ step element PEl such are ⁇ coupled to the piezoelectric element PEl is excited to mechanical vibrations.
  • power generation system EES to the invention comprises a integ ⁇ tured circuit ASIC energy management provided by the piezo-electric energy converter ⁇ EWL electrical energy.
  • the first housing part GT1 is advantageously designed as a static lower part housing.
  • the energy generation system EES comprises an energy store ESP for temporary storage. witnessed electrical energy.
  • the energy storage element ESP can be realized, for example, as a double-layer capacitor (gold cap).
  • power generation system according to the invention may comprise EES (Senoren or actuators, for example) a power interface for supplying electrical ESS ⁇ 's consumers.
  • the power generation system EES a second housing part GT2 with second excitation means AM2, wherein the second housing part is GT2 movably arranged on the first Ge ⁇ casing part GT1, so that by translational movements of the second housing part GT2, substantially in the direction of the first excitation means AMI, said first excitation means are driven AMI mecha nically ⁇ by the second excitation means AM2.
  • the housing parts GT1 and GT2 protect the piezoelectric generator EW1, among other things from mechanical damage.
  • the piezo-based, miniaturized and highly integrated energy generation system EES according to the invention makes it possible, in particular, to provide electrical operating energy for realizing autonomous sensor technology or actuators.
  • the power supply module EES consists of a functionally two-part housing.
  • the module components MEMS generator EW1 (with piezoelectric element PE1) interface ASIC and energy ⁇ gie Grandeelement ESP and power interface ESS integrated to ex ⁇ ternem consumers.
  • the first casing part Ge ⁇ GT1 elements FEI, FE2 for the defined mechanical guiding a second movable housing GT2 on.
  • the movable housing part GT2 has a articulation mandrel AM2 for pulsed excitation (see FIG. 2) of the MEMS generator EW1.
  • the inventive power supply module ⁇ EES based on a deflection of the movable housing part GT2.
  • the deflection leads via the articulation mandrel AM2 to an excitation of the natural oscillation of the piezo-MEMS flag PE1 of the generator EW1 by means of the driver AMI integrated in the static housing part GT1.
  • the primary electrical energy in the transducer EW1 is extracted effi cient ⁇ via the interface ASIC and the memory element ESP supplied with suitable voltage levels. Over the expected energy ⁇ interface ESS an external consumer (eg, corresponds removed attached sensors) can be connected.
  • the deflection of the movable housing part GT2 is fed from me ⁇ chanischer ambient energy.
  • me ⁇ chanischer ambient energy typically, two cases are conceivable.
  • various deformation processes for example from an industrial environment (eg conveyor belts) can be used for this purpose.
  • attaching an optional additional mass M to the movable housing part GT2 can be advantageous.
  • the miniaturization of the power supply system EES according to the invention is based on a MEMS piezoelectric generator and the realization of the interface circuit as an ASIC.
  • MEMS typical layer thicknesses in the range of typically
  • Table 1 Estimation of the system mass of the energy module according to the invention and comparison with conventional battery.
  • MEMS component consisting of a piezo-generator PE1 with integrated mechanical energy storage (optional passive carrier layer of the piezo-generator) with layer thicknesses in the range of typically 1 ⁇ - ⁇ and a driver for pulsed excitation of the piezoelectric structure.
  • Energy storage ESP (optional) designed as Kon ⁇ capacitor (eg GoldCap) or battery.
  • Energy interface ESS (optional), which allows connection to external consumers.
  • One housing base GTl with optional stops for the mechanical limitation of a movably mounted upper housing part GT2.
  • Optional spring elements Fl, F2 which lead to a restoring ⁇ lenden force in deflection of the movably mounted Ge housing upper part GT2.
  • a movably mounted upper housing part GT2 which has a Anlenkdorn AM2 for actuating the driver AMI in the MEMS generator PE1.
  • a movably mounted upper housing part GT2 which has an optional additional mass M.
  • FIG. 2 shows an exemplary functional diagram for an off ⁇ steering of a piezoelectric element by a periodic excitation
  • the underlying idea of the invention is the Prettymecha African deflection of a piezoelectric beam structure.
  • the bars- structure piezo element
  • the piezoelectric bar then begins to oscillate at its natural frequency 1 / T os .
  • the vibration is damped.
  • the system is now periodically excited with 1 / T ex .
  • a non-periodic excitation An advantage of a periodic excitation lies in the continuous provision of electrical energy by the energy converter.
  • An object of the present invention is the realization of the vibration excitation shown in FIG.
  • a linear translational movement (FIG. 1) must be provided or used directly.
  • FIGS. 3a-3c show an example of vibration excitation of a piezoelectric bar PE2, PE ', PE "by means of a linear translational movement B2, ⁇ 2', B2" and of a suitable mechanical rigid carrier SM, SM ', SM ".
  • the electrical energy generated by the piezoelectric bar PE2, PE2 ', PE2'' is provided via the energy converter EW2, EW2', EW2 '' by a suitable electrical contacting electrical consumers.
  • 3a - 3c show how the translational Auslen ⁇ effect is used for vibration excitation.
  • FIGS. 3a-3c show the case of a rigid frontal driver SM, SM ', SM ".
  • the maximum deflection of the piezo-bellows structure PE2, PE2 ', PE2'' is determined by the reversal point of the translatory movement B2, ⁇ 2', B2 '' (in this case, reproducible and stable behavior is required here).
  • the driver SM, SM ', SM' moves faster than the piezoelectric bar PE2, PE2 ', PE2''. This can in principle be fulfilled if the period of the natural frequency of the piezoelectric structure ⁇ PE2 PE2 ', PE2''is greater than the duration of the deflection.
  • the piezoelectric bar can oscillate freely with its natural frequency.
  • the rigid frontal driver SM, SM ', SM'' can be attached, for example, to a conveyor belt or to a wheel, by means of which a translational movement B2, ⁇ 2', B2 '' is provided.
  • the translatory movement B2, B2 ', B2 may be periodically recurring.
  • FIGS. 4a-4d show an exemplary vibration excitation of a piezo-bar-type generator PE3, PE3 ', PE3'',PE3'' by means of a linear translatory movement B3, B3 ', B3''and of a suitable semi-flexible mechanical driver SFM, SFM', SFM '', SFM ''.
  • the electrical energy generated by the piezoelectric bar structure PE3, PE3 ', PE3'',PE3''' is via the energy converter EW3, EW3 ', EW3'',EW3''' by a suitable electrical contacting electrical consumers (eg decentralized actuators or sensors ) provided.
  • FIG. 5 shows an exemplary schematic representation of a piezoelement PE4.
  • Figure 5 shows an exemplary piezoelekt ⁇ generic flag PE4 (or a piezoelectric bending beam) having a substantially triangular base.
  • the mechanical force B4 is substantially perpendicular to an end face of the piezo triangle PE4 and causes the piezo flag PE4 to vibrate.
  • the triangular base creates a high energy conversion efficiency.
  • the triangular piezoelement PE4 can be used in the energy converter according to the invention in any dynamically deformable environment. For example, in conveyor belts, at the reversal points of the elastic conveyor belt is deformed or in industrial automation (eg robots), where there are many moving parts that are protected, for example by deformable rubber sleeves.
  • the mechanical environment energy (deformation energy) called mechanical force is coupled in such a way in the piezoelectrically ⁇ hari harideformation energy) called mechanical force is coupled in such a way in the piezoelectrically ⁇ hari harideformation energy) called mechanical force is coupled in such a way in the piezoelectrically ⁇ hari harideformation energy) called mechanical force is coupled in such a way in the piezoelectrically ⁇ hari haride
  • FIG. 6 shows an exemplary schematic execution ⁇ for example a piezo element PE5.
  • the example according to FIG. 6 shows the piezo element PE5 as a multilayer rectangular or substantially rectangular plate.
  • the piezo element PE5 can in principle also take other forms (eg triangular shape).
  • the piezoelectric element PE5 has a layer sequence of electrode layer ESI, piezoelectric layer PES and white ⁇ more excellent electrode layer ES2.
  • a plurality of such layer sequences can be stacked on top of one another, so that a multi-layer structure with stacked, alternately arranged electrode layers ESI, ES2 and piezoelectric layers PES results.
  • the electrode material of the electrode layers ESI, ES2 may consist of a wide variety of metals or metal alloys. Examples of the electrode material are platinum, titanium and Pla ⁇ tin / titanium alloy. Also conceivable are non-metallic, electrically conductive materials.
  • the piezoelectric layer PES may also be made under ⁇ Kunststofflichsten materials.
  • piezoelectric ceramic materials such as lead zirconate titanate (PZT), zinc oxide (ZnO) and aluminum nitride (A1N).
  • PZT lead zirconate titanate
  • ZnO zinc oxide
  • A1N aluminum nitride
  • Piezo ⁇ electrical organic materials such as polyvinylidene difluoride (PVDF) or polytetrafluoroethylene (PTFE) are also conceivable.
  • the piezoelectric element PE5 has an electrically passive carrier layer TS.
  • the carrier layer TS increases the mechanical strength of the piezoelectric element PE5 and acts in electrical damping of the energy converter as a mechanical energy storage.
  • the mechanical energy is obtained from the carrier layer TS in a piezoelectric layer of the piezoelectric ele ments ⁇ PE5 continuously redistributed.
  • the elekt ⁇ driven passive carrier layer TS is a mechanical Energyspei ⁇ cher.
  • the MEMS Micro Electro Mechanical Systems
  • the piezoelectric layer PES is a few ⁇ thick, for example ⁇ 1 ⁇ to 10 ⁇ .
  • the piezoelectric element PE5 is configured as a thin piezoelectric plate.
  • the piezo-electric element ⁇ PE has a very low mass.
  • the carrier layer TS5 may be made of silicon, polysilicon, silicon dioxide (S1O 2 ) or silicon nitride (S1 3 N 4 ) be.
  • a layer thickness of the carrier layer is out of the TS Be ⁇ range from 1 ⁇ ⁇ selected to 100th
  • a miniaturized trained energy converter increases the range of possible applications and applications, especially in decentralized applications that require a self-sufficient and maintenance-free energy supply. Furthermore, a commercially available bulk material (produced, for example, by means of green-film technology) with thicknesses in the range of a few hundred ⁇ m can be used.
  • FIG. 7 shows an application example for the use of the power generation system (EES, Figure 1) according to the invention in a mechanically deformable environment.
  • Figure 7 shows a tire R from the side with tire rattle RL on a road surface FB, as an example of the use of the power generation system (EES according to the invention, Figure 1).
  • the power generation system according to the invention (EES, Figure 1) is on the inside of the car tire R (eg on the inside of the tread) mounted (eg, by gluing or vulcanization) such that a deformation of the tire lash (Reifenaufstandsfla ⁇ che) on the movable housing part (GT2 1) and this deformation energy is coupled via the excitation means (AMI, AM2, FIG.
  • the primary mechanical ambient energy (eg Ver ⁇ deformation energy through the tire contact area) is not directly applied to the piezoelectric elements (PE1; Figure 1) is coupled, but indirectly by the excitation means (AMI, AM2, Figure 1). Through them housing structure (GT1, GT2, Figure 1) and the guide elements (FEI, FE2; Figure 1) thus occurs a con trolled ⁇ coupling of the mechanical ambient energy to the piezoelectric elements (PE1; Figure 1).
  • the energy necessary for the operation of the tire sensor system can thus be provided by the tire R itself.
  • the tire sensor system can thus be operated in an energy-autonomous manner.
  • the energy generation system (EES, FIG. 1) according to the invention can be used in any dynamically deformable environment. For example, in conveyor belts at the reversal points of which the elastic conveyor belt is deformed or in industrial automation (for example robots) where there are a large number of moving parts, e.g. are protected by mechanically deformable rubber sleeves.
  • Figures 8a-8b show exemplary acceleration diagrams when passing through the tire lap (RL; Figure 7) at different speeds.
  • the accelerations occurring when passing through the tire lap at different speeds are shown by way of example.
  • the associated forces can be very easily exploited by the power supply module according to the invention (EES, Figure 1), in a suitable manner on the maturity ⁇ inside is attached (eg vulcanize).
  • Figure 8a shows the acceleration when passing through the tire bladder at the speed 15 km / h.
  • FIG. 8b shows the acceleration when driving through the tire at the speed of 230 km / h.
  • the inventive step is u.a. in the manner of the realization of a piezobas striving, miniaturized and highly integrated power supply module (EES, Figure 1).
  • the present invention has the following ADVANTAGES ⁇ le:
  • the module ⁇ mass may be limited to a total of a few grams. This allows in particular the use in high dynamic ⁇ rule environments such as a tire interior.
  • Energy generation system in particular designed as integ ⁇ tioned miniaturized power generation system, with a piezoelectric energy converter for converting mechanical energy into electrical energy with at least one piezoelectric element, a first housing part in which the piezoelectric element is arranged deflectable at one end, first excitation means for mechanical excitation of the pie ⁇ electrical element, wherein by the first excitation ⁇ medium in the piezoelectric element, a mechanical force can be coupled such that the piezoelectric ⁇ cal element is excited to mechanical vibrations, and an integrated circuit (ASIC) for energy management of the piezoelectric energy converter provided energy.
  • ASIC integrated circuit

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
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  • Microelectronics & Electronic Packaging (AREA)
  • Mechanical Engineering (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)

Abstract

L'invention concerne un système de conversion d'énergie, en particulier conçu comme système de conversion d'énergie miniaturisé intégré, comprenant un convertisseur d'énergie piézoélectrique (EW1-EW3) pour convertir de l'énergie mécanique en énergie électrique comprenant au moins un élément piézoélectrique (PE1-PE5), une première partie de boîtier (GT1) dans laquelle l'élément piézoélectrique (PE1-PE5) est disposé de manière déviable à une extrémité, des premiers moyens d'excitation (AM1) pour l'excitation mécanique de l'élément piézoélectrique (PE1-PE5), une force mécanique étant injectée par les premiers moyens d'excitation (AM1) dans l'élément piézoélectrique (PE1-PE5) de telle manière que l'élément piézoélectrique (PE1-PE) soit incité à effectuer des oscillations mécaniques, et un circuit intégré (ASIC) pour la gestion énergétique de l'énergie produite par le convertisseur d'énergie piézoélectrique (EW1-EW3).
PCT/EP2011/064101 2010-09-03 2011-08-16 Module d'alimentation en énergie piézoélectrique hautement intégré WO2012028453A1 (fr)

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DE102010040238A DE102010040238B4 (de) 2010-09-03 2010-09-03 Hochintegriertes piezoelektrisches Energieversorgungsmodul

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