EP3939099A1 - Energy harvesting system - Google Patents
Energy harvesting systemInfo
- Publication number
- EP3939099A1 EP3939099A1 EP20727945.6A EP20727945A EP3939099A1 EP 3939099 A1 EP3939099 A1 EP 3939099A1 EP 20727945 A EP20727945 A EP 20727945A EP 3939099 A1 EP3939099 A1 EP 3939099A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- energy harvesting
- harvesting system
- piezoelectric
- energy
- previous
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
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
- H02N2/181—Circuits; Control arrangements or methods
-
- 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
- H02N2/186—Vibration harvesters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/70—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries characterised by the mechanical construction
-
- 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
-
- 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 an energy harvesting system.
- Photovoltaics a well-known example with which an electrical device, for example a path light, can be operated independently of the power grid.
- a less well-known microscopic alternative is to use the piezoelectric effect to generate energy from the environment.
- Deformation of the piezoelectric material for example due to pressure or vibrations, can affect the piezoelectric material electrical voltage can be tapped, which can be used for energy supply.
- a piezoelectric energy harvesting system that has a good energy yield in several spatial directions is therefore desirable.
- the object of the present invention is to provide a
- the present object is achieved by the energy harvesting system according to claim 1. More beneficial
- the piezoelectric unit has at least two piezoelectric units and a central control unit.
- the piezoelectric units in turn each have a piezoelectric layer and integrated electronics, the integrated
- the piezoelectric layers are angled to one another
- the integrated electronics contact the central control unit, which in turn has a control module and is designed to collect electrical energy from the piezoelectric units, the control module being designed to minimize or prevent mutual electrical damping of the piezoelectric units.
- An energy harvesting system can thus be built that consists of several piezoelectric units, which are used as
- Caching can be used.
- angled can be understood here to mean an arrangement in which the layers in question are at any angle, but different from 0 °
- the angle between the layers can be considered to be an angle that is defined by the
- the layers angled to one another can thus be arranged with respect to one another as desired, with only a parallel arrangement of the layers
- the angle between the two layers arranged at an angle to one another should preferably be at least 10 °, particularly preferably at least 45 °.
- the amount of energy that a piezoelectric layer can generate is highly dependent on the degree of deformation of the piezoelectric material and thus closely tied to the geometry used. Especially in geometries that result in an anisotropic flexibility, such as one
- the possible energy gained is strongly dependent on the direction of an acting force.
- a force with a direction parallel to the normal can lead to a strong deformation and thus a strong energy gain, whereas an equally large force perpendicular to the normal does not produce any deformation and thus no energy gain.
- each piezoelectric unit has its own integrated electronics, which smooth and limit the voltage generated in the piezoelectric layer, the generated, often strongly fluctuating, voltage can be used directly for other
- control module in the control unit can primarily be used to prevent or minimize mutual electrical damping of the piezoelectric units.
- the two piezoelectric layers can be perpendicular
- At least two piezoelectrics are provided to stand by each other. At least two piezoelectrics
- the Energy Harvesting System can be a third
- the third piezoelectric layer is arranged perpendicular to the first two piezoelectric layers, it is possible to obtain the maximum energy from the further third
- the Energy Harvesting System can do other tasks
- the piezoelectric layers can be in the shape of a segment of a circle. Piezoelectric layers in the form of circular segments
- the piezoelectric layers can be arranged in three intersecting circular planes.
- the three planes can intersect at right angles to one another. The energy generation is therefore independent of direction, since the sum of the energies generated from the piezoelectric layers in the three levels is independent of the orientation of the Energy
- Fastening the piezoelectric units and the control unit in a framework can be useful in order to increase the mobility of the energy harvesting system.
- Vibrations and forces acting on the framework are transmitted to the piezoelectric layers, which enables them to generate electrical energy.
- Another possibility is an attachment with an adhesive. Depending on the expected
- Reinforcement elements especially at angles, can further increase the stability and robustness of the scaffolding.
- Plastics and metals can be used as the material without excluding other materials.
- a design of the framework can be spherical.
- a spherical shape allows the Energy Harvesting System to generate electrical energy, for example by rolling.
- a spherical energy harvesting system is also suitable for use in a sports ball, such as a soccer ball, a basketball, a tennis ball, a baseball or even a bowling ball.
- the at least two integrated electronics can be connected to one another in parallel or in series to form a group.
- the electrical power generated is output with a different electrical voltage and electrical current. If the integrated electronics are connected in parallel to form a group, the electrical current output by the individual integrated electronics can be added and increased overall. In a serial connection of the integrated electronics, on the other hand, the voltages output of the integrated electronics are added and thus increased overall.
- the Energy Harvesting System can do several of the following
- the groups of integrated electronics can be interconnected in parallel or in series. Analogous to individual integrated electronics that are interconnected in series or in parallel, the output current from several groups can be added if the individual groups are interconnected in parallel, and the output voltage if the individual groups are interconnected in series.
- the integrated electronics and / or the control unit can have electrical components to limit a in the
- the rectifier can take the AC voltage from the
- piezoelectric layers are converted into a smooth DC voltage, which can then be used by other electrical components. It can therefore be expedient to implement a rectifier that converts alternating current to direct current into the integrated electronics.
- Zener diode acts as a kind of fuse for the integrated circuit. In the event of excessive tension, it provides a
- piezoelectric layer is suppressed by the Zener diode.
- the rectifier can be integrated in an integrated circuit and a Protection circuit can be connected in parallel to the integrated circuit.
- the protection circuit can consist of one
- Transistor and the capacitor can be connected.
- the transistor can be controlled by a voltage taken from the voltage divider.
- the voltage divider here should be designed so that the transistor
- Piezoelectric layers is therefore stored on the capacitor connected in series and can be used after a voltage spike. Accordingly, the protective circuit described can also achieve a higher degree of efficiency than the circuit with a Zener diode, since it is excessive
- the resistance of the capacitor is for transient
- the control unit can have an RF module. Thus, the control unit can send information wirelessly to a receiver.
- control unit and the RF module can be designed with the electrical energy collected from the energy
- the energy harvesting system can be completely self-sufficient in terms of energy, which means that all electrical components in the system are only operated with the energy obtained from the piezoelectric layers. This makes it possible to completely do without an external energy supply, making the energy harvesting system independent and mobile.
- the piezoelectric layers can be arranged on a substrate that is thinner than 1 mm.
- a substrate increases the mechanical stability of the piezoelectric layers, which means that they can withstand greater forces without damage.
- a substrate especially if it's too stiff, can be a
- a thickness of less than 1 mm has been found to be
- the thickness of the substrate should not be less than 0.2 mm.
- the substrate can also be electrically conductive.
- the piezoelectric layer can be placed directly over the
- Substrate are contacted and the substrate can be used as an electrode in this way.
- the piezoelectric layer can be adapted to the shape of the substrate. This makes it possible to cover the largest possible area of the substrate with a piezoelectric layer and to optimize the generation of energy.
- the substrate itself can be square, triangular, or circular be circular sector-shaped or have any other shape. On the one hand, the substrate shape and thus also the shape of the piezoelectric layer for the geometric
- the coupled-out voltage can meet the requirements of the piezoelectric layers
- the piezoelectric units can have limiters which are designed for the deflection of the
- a limiter is here, for example, a part that covers the entire, half or even only a quarter of the piezoelectric layer with a certain distance.
- the limiter is designed to mechanically limit the amplitude of the deformation or deflection of the piezoelectric layer, for example in that the piezoelectric layer strikes the limiter when the maximum permissible deformation is reached. Approx. 1 mm distance to the piezoelectric
- the limiter limits the maximum deflection of the piezoelectric layer and thus limits the mechanical load on the piezoelectric layer in the event of strong forces, but also for continuous operation.
- the limiter can be used to avoid strong voltage peaks on the piezoelectric layers, which occur in the event of strong deformation.
- control unit can also have a DC voltage converter to which the integrated electronics are connected. This enables the DC voltage that is decoupled from the integrated electronics into another, for example for the Control or RF module needed to convert voltage.
- both the integrated electronics and the control unit can have a smoothing capacitor. If the Energy Harvesting System does not have a DC / DC converter, a smoothing capacitor can be integrated in the
- Electronics or the control unit reduce voltage fluctuations and thus smooth the voltage curve. If a
- DC-DC converter is integrated into the control unit, due to a capacitance of a first capacitor on the integrated electronics, which is electrically connected upstream of the DC-DC converter, and the capacitance of a second capacitor on the control unit, which is the
- DC-DC converter is electrically connected downstream, the ratio between input and output voltage can be adjusted.
- the control module can be a system-on-a-chip (SoC) or a microcontroller. Both options make it possible to program processes and functions in the energy harvesting system and also allow the energy harvesting system to be expanded with other electrical and programmable components. In addition, SoC and microcontrollers are included
- the RF module can have a power-on reset time with a duration of less than 50 ms.
- An RF module with such a short power-on reset time requires little energy to start up in a functional state. This is why RF modules have a short power-on reset time suitable for integration into energy harvesting
- Low-energy Z-Wave, ZigBee or Bluetooth modules are expressly suitable as RF modules because they require little energy and can be controlled via a control module.
- the RF module is a Bluetooth transmitter
- the Bluetooth transmitter can be designed to adapt the number of channels. According to the Bluetooth standard, there are 79 channels with a frequency width of 1MHz each. The entire frequency range is not used for sending small packets
- the Bluetooth transmitter can transmit on a single channel. This is the
- Bluetooth receiver is possible. As a result, depending on the number of channels, the most energy can be saved with only one channel.
- the transmission signal, the transmission power and the intermediate signal pause must be set so that as little energy as possible is consumed. This can be implemented differently depending on the RF module.
- the transmission power can for example be reduced depending on a reception strength to such an extent that a reliable connection continues to exist.
- the duration of a transmission signal can also in this respect
- the control unit can additionally have a rechargeable battery or a capacitor for energy storage.
- a rechargeable battery or a capacitor for energy storage.
- Piezoelectric layers is obtained, stored and accumulated. This makes it possible to use the Energy
- Harvesting system can also be used to operate applications and electrical components that require greater electrical power or to use the collected energy at a later point in time.
- control unit can be configured to use the generated in the piezoelectric layers
- the deflection of the piezoelectric layers is primarily proportional to an acceleration acting on them, an acceleration can be inferred from the voltage generated at the piezoelectric layers. Since the piezoelectric layers are arranged perpendicular to one another, both the amount and the direction of the
- control unit can have further sensors.
- the Energy Harvesting System can be used for useful for many applications that require advanced sensor technology. This can be, for example, GPS sensors, temperature sensors, force sensors,
- the piezoelectric layer can be a polymer layer, a ceramic layer, a ceramic thin layer, a
- the layer is piezoelectric, it is in principle suitable for use in an energy harvesting system.
- a polymer or ceramic thin layer has the advantage over other piezoelectric layers that it is more flexible.
- the voltage output of the piezoelectric layer can be adapted by changing the monolithic interconnection.
- the piezoelectric layer can be thinner than 300 ⁇ m. Depending on the thickness of the piezoelectric layer, but also on other geometric and material factors, the piezoelectric layer becomes stiffer or more flexible or
- piezoelectric layer on the substrate can be greatly changed. From this point of view, a
- piezoelectric layer the flexibility of a thin
- An energy harvesting system according to the present invention can be integrated in a shock sensor in that the energy harvesting system is connected, for example, to a scaffolding, the energy harvesting system being designed to detect an impact or shock and to do so
- Such an energetically self-sufficient shock sensor is able to detect a strong acceleration, as given by an impact, and to send it to a receiver, such as a smartphone, without an external one
- FIG. 1 shows a plan view of a piezoelectric layer which is arranged on a substrate.
- FIG. 2 shows a three-dimensional view of an arrangement of three piezoelectric units.
- FIG. 3 shows a possible one in a structure diagram
- FIG. 4 is a schematic diagram wherein the
- Transmission power of an RF module is plotted against time.
- Figure 5 shows a circuit diagram of a protective circuit.
- FIG. 6 shows a circuit diagram of a protection circuit in which the transistor is a MOSFET with eight pins.
- Figure 7 shows a layout of a circuit board of
- FIG. 8 shows two integrated electronics that are connected in parallel.
- FIG. 9 shows a circuit board on which two integrated electronics are arranged, the rectifiers being made up of eight discrete individual diodes.
- FIG. 10 shows a circuit diagram of the integrated electronics shown in FIGS. 8 and 9.
- FIG. 11 shows an arrangement in which 24 piezoelectric layers are fastened in a framework.
- FIG. 12 shows an arrangement in which 24 piezoelectric units are fastened in a frame.
- FIG. 13 shows an open shock sensor in which an energy harvesting system according to the present invention is integrated.
- FIG. 14 shows a spherical framework that is reinforced at the angles.
- Figure 15 shows a holder for a central
- FIG. 16 shows a hemispherical casing for a frame with holes.
- FIG. 17 shows in a schematic sketch the mode of operation of a shock sensor.
- Figure 1 shows a plan view of a piezoelectric
- Layer 6 which is arranged on a substrate 8 and for an energy harvesting system 1 according to the present invention
- Layer 6 is attached to substrate 8 using an adhesive process, but it is also possible to deposit the piezoelectric layer 6 directly onto substrate 8 or
- the piezoelectric layer 6 was on the
- the substrate 8 has holes which are used to fasten the substrate 8, for example with screws.
- the substrate 8 is indeed in the shape of a sector of a circle because it was adapted to the requirements of an application, but it can have any other shape.
- the piezoelectric layer 6 shown in Figure 1 is a PZT-5H ceramic layer, but it is also possible that piezoelectric layer 6 from another
- Ceramic thin layer a multilayer ceramic, a
- the superiority of a monolithic ceramic layer over normal piezoelectric layers 6 is that the voltage output can be adjusted by the
- the substrate 8 is made of steel and is therefore electrically conductive. If the piezoelectric layer 6, as shown in FIG. 1, is arranged directly on a conductive substrate 8, the piezoelectric layer 6 can be contacted via the substrate 8 by using the substrate 8 as an electrode. In addition to steel, other metals such as
- non-metallic conductors can be used.
- the PZT-5H layer shown in Figure 1 is 300 gm thick and the steel substrate 400 gm thick.
- a substrate 8 increases the mechanical stability of the piezoelectric layers 6, so that they can withstand a greater force without being damaged.
- a substrate 8, especially if it is too stiff, can hinder a deflection and thus a deformation of the piezoelectric layer 6 and thus reduce possible energy generation.
- the thickness of the piezoelectric layer 6 the thickness of the piezoelectric layer 6
- piezoelectric layer 6 more rigid or flexible and also more stable or unstable. Taking these aspects into account a layer thickness of less than 300 ⁇ m for the piezoelectric layer 6 and less than 1 mm for the substrate 8 has proven to be favorable. These thick ones can, however
- FIG. 2 shows a three-dimensional view of an arrangement of three piezoelectric units 3, the piezoelectric units being arranged perpendicular to one another.
- Each of the three piezoelectric units 3 has a substrate 8 on which a piezoelectric layer 6 is arranged, and integrated electronics 7, which are used for smoothing and
- the energy harvesting system 1 has three piezoelectric units 3, the piezoelectric layers 6 of which are perpendicular to one another, energy is generated
- the force component parallel to the normals of the piezoelectric layer 6 is primarily important for the energy generation of a single piezoelectric unit 3, since this is decisive for the deflection of the
- the piezoelectric layer 6 and thus the generation of energy.
- the force component parallel to the normal to the layer is important for the deflection, and the generation of energy is therefore due to the orthogonal arrangement of the piezoelectric
- an acceleration acting on the energy harvesting system 1 can be determined as a function of the direction. From the generated on the piezoelectric layers 6
- a control module 4 can calculate the acceleration voltages which are dependent on the deflection and an acceleration acting on it.
- the orthogonal arrangement of the piezoelectric layers 6 makes it possible to determine both the magnitude and the direction of the acceleration.
- control module 4 With an integrated analog-to-digital converter, since this is able to read out the analog voltage output from the piezoelectric layers 6.
- the voltage generated by the piezoelectric layer 6 is a rectifier 10, for example a
- the integrated electronics 7 Converts AC voltage from the piezoelectric layers 6 into a smooth DC voltage.
- the integrated electronics 7 also have a Zener diode, the possible electrical
- the voltages are then sent from the rectifiers 10 to a DC voltage converter 11, with a smoothing capacitor 12 connected to the DC voltage converter 11 is upstream and downstream.
- the DC voltage converter 11 makes it possible to convert the voltages which are coupled out from the rectifiers 10 into another voltage, for example required for the control unit 2, and to bundle this voltage. This enables electrical components on the
- Control unit 2 that is not directly related to the
- piezoelectric layers 6 output voltage can be operated to operate.
- RF module 5 can be provided with a suitable voltage.
- Control unit 2 a higher electrical power than can be obtained directly via the piezoelectric layers 6, a rechargeable battery or a capacitor for energy storage can be integrated on the control unit 2.
- the energy that is obtained with the piezoelectric layers 6 can be stored and accumulated.
- the accumulated energy can then be used, for example, to expand the sensor system.
- These can be GPS sensors, temperature sensors, force sensors, humidity sensors or any other sensor.
- the RF module 5 preferably has a power-on reset time with a duration of less than 50 ms.
- An RF module 5 with a short power-on reset time requires less energy to start up in a functional state. Therefore, RF modules 5 with a short power-on reset time are particularly suitable for integration in an energy harvesting system 1.
- low-energy Z-Wave, ZigBee or Bluetooth modules are suitable as RF modules 5 because they are not very
- Figure 4 is a schematic diagram showing the
- Transmission power of a Bluetooth module is plotted against time.
- the Bluetooth module has a startup or power reset time of approximately 5 ms.
- the Bluetooth module then sends alternately on three channels.
- a cycle through the channels takes about 1.5 ms.
- three of the 79 possible channels are used.
- the number of channels can depend on the required
- Transmission speed can be adjusted, with a smaller number being more energy-efficient.
- a particularly preferred embodiment is only sent on a single channel in order to provide an information transmission that is as energetically efficient as possible. Additionally or alternatively, the energy required for sending
- a protection circuit 17, as shown in Figure 5, for protecting electrical Components are used. This is particularly effective if the rectifier 10 is implemented in an integrated circuit, since an excessive voltage in a
- a voltage divider which consists of the resistors RI and R2, is connected in parallel to a capacitor C2, which is connected in series with a transistor Ml.
- a voltage is tapped between the resistors RI and R2 and electrically connected to the gate.
- the voltage divider and the transistor Ml are matched to one another so that an excessive voltage that may lead to a
- the resistance RI is ten times as large as the resistance R2. Accordingly, an electric charge flows to the capacitor C2 and the excessive voltage is lowered. This way one becomes parallel to it
- a MOSFET can preferably be used as the transistor M1.
- a protection circuit 17 is also shown in FIG. In this protective circuit 17, too, a voltage divider, consisting of the resistor RI and the resistor R2, is connected in parallel to a capacitor CI, which is connected in series with a transistor. In contrast to
- this is a power MOSFET Ql with eight pins, which is suitable for higher powers is.
- the gate G which is on the third pin, is connected to the
- the two sources S1 and S2 are connected to the fourth and seventh pin and are connected to the negative conductor.
- FIG. 7 shows the layout of a printed circuit board 18 on which the circuit shown in FIG. 5 is arranged.
- the circuit board 18 has the shape of a sector of a circle
- Circuit board 18 can be fastened by means of a screw connection via a through-hole which is set on the round edge of the circuit board 18. Pointing to the round edge is
- FIG. 8 shows two integrated electronics 7, each of which is installed on a circuit board 18 in the shape of a circular sector, and which are connected to one another in parallel to form a group.
- the piezoelectric layers 6 can usually provide a sufficiently high voltage, while the generated current intensity can be too low for some applications.
- Electronics 7 are added together and thus increased. Depending on the generated electrical currents and voltages of the piezoelectric layers 6, several integrated circuits 7 are connected to one another in series or in parallel to form groups. A serial or parallel connection of several groups with one another can also be useful in order to obtain a required voltage or a
- FIG. 9 also shows a circuit board 18 which, like circuit board 18 in FIG. 7, has a circular sector shape in order to adapt it to the shape of a frame 14.
- the printed circuit board 18 has two through-holes on the rounded edge, with which it can be fixed to the framework 14 by screwing.
- two integrated electronics 7 are installed on the circuit board 18 in FIG. 9, which process the electrical energy from two piezoelectric disks, the two integrated electronics 7 in parallel
- Electronics 7 is not an integrated circuit for
- the integrated electronics 7 are via a circuit with four discrete individual diodes D1-D4
- a Zener diode or a protective circuit 17 can be dispensed with.
- FIG. 10 shows the circuit diagram of the printed circuit board 18 shown in FIG. 9. These are two bridge rectifiers connected in parallel, each made up of four discrete
- Individual diodes D1-D4 are interconnected in such a way that two serially interconnected individual diodes D1-D4 are interconnected in parallel with one another.
- the tension to be smoothed out from the piezoelectric layers 6 is fed between the serially connected individual diodes D1-D4.
- the forward direction of the diodes can be positive, and opposite to the forward direction, negative
- DC voltage can be tapped. It can be advantageous to add a capacitor in parallel to the bridge rectifier or even to each discrete individual diode D1-D8
- Rectifier diodes or signal diodes are particularly suitable as discrete individual diodes D1-D8.
- FIG. 11 An arrangement is shown in which 24
- Piezoelectric layers 6, similar to those in FIG. 1, are fastened in a framework 14.
- the frame 14 consists of three interlocking circles which are each perpendicular to one another. It preferably consists of one
- piezoelectric layers 6 are each within one of the three perpendicular circles
- piezoelectric layer 6 receives.
- FIG. 12 shows an arrangement in which 24 piezoelectric units 3 are fastened in the framework 14.
- a limiter 9 and the internal electronics 7 are attached to each of the piezoelectric layers 6.
- the limiters 9 are designed to the deflection of the
- the limiters 9 in FIG. 5 span over half of the piezoelectric layer 6 with a spacing of approximately 1 mm, but they can cover the whole or only a quarter of the piezoelectric layer Cover 6 with a certain distance.
- the limiter 9 reduces the mechanical load on the piezoelectric layers 6 in the event of strong forces, but also in the
- control unit 2 here
- the framework 14 with the integrated energy harvesting system 1 can be closed with cover parts 15 and can additionally be covered with a protective layer, for example made of leather, rubber or plastic.
- a protective layer for example made of leather, rubber or plastic.
- the frame 14 of the shock sensor 13 can, as shown in FIG. 14, be reinforced.
- the shock sensor 13 is therefore suitable for even greater forces and acceleration, with which it can also generate a greater amount of energy.
- Cross struts 19 which are arranged at the angles of the interlocking circles and connect them, realized.
- the cross struts 19 themselves are also round and wise
- FIG. 15 shows a holder 20 for the central control unit 2 which is suitable for this purpose
- the central control unit 2 can be attached to the composite surface which has two perforations.
- FIG. 16 shows a further embodiment of a cover part 15.
- This embodiment does not have the shape of an eighth of a spherical surface, but rather half a spherical surface.
- the spherical frame 14 of the shock sensor 13 can therefore already be encased with two cover parts 15 and does not require eight cover parts 15, as in the first embodiment. This makes the shock sensor 13 more robust.
- the cover part 15 has through-holes with depressions, via which it is screwed to the framework 14 by means of the through-holes in the cross struts 19 of the framework 14.
- the cover part 15 On the part of the cover part which is located above the holder 20 of the central control unit 2 of FIG. 15, the cover part 15 has a plurality of through-bores. This ensures that the signal of the RF module 5 contained in the control unit 2 experiences less attenuation.
- Figure 7 shows in a schematic sketch the
- the shock sensor 13 can be expanded with other sensors and can therefore be used in a wide variety of fields of application
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019112746 | 2019-05-15 | ||
| PCT/EP2020/063645 WO2020229671A1 (de) | 2019-05-15 | 2020-05-15 | Energy harvesting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3939099A1 true EP3939099A1 (de) | 2022-01-19 |
Family
ID=70847335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20727945.6A Withdrawn EP3939099A1 (de) | 2019-05-15 | 2020-05-15 | Energy harvesting system |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20220216811A1 (de) |
| EP (1) | EP3939099A1 (de) |
| JP (1) | JP2022532208A (de) |
| CN (1) | CN113795934A (de) |
| WO (1) | WO2020229671A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114584002A (zh) * | 2022-04-20 | 2022-06-03 | 北京工业大学 | 一种三方向可调节集中式压电俘能器 |
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| US20080252174A1 (en) * | 2007-04-10 | 2008-10-16 | Advanced Cerametrics, Inc. | Energy harvesting from multiple piezoelectric sources |
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| JP5589729B2 (ja) * | 2010-09-30 | 2014-09-17 | 大日本印刷株式会社 | 圧電素子発電回路 |
| DK3446742T3 (da) * | 2013-03-15 | 2023-09-04 | Carewear Corp | Lysterapienhed |
| JP2016127656A (ja) * | 2014-12-26 | 2016-07-11 | ムネカタ株式会社 | 環境発電素子で発生した電力を蓄電する蓄電装置 |
| CN106558907B (zh) * | 2015-09-30 | 2020-11-03 | 中兴通讯股份有限公司 | 一种终端充电装置和终端 |
| CN105915114B (zh) * | 2016-05-31 | 2018-05-01 | 太原市一正泰输配电设备制造有限公司 | 一种基于压电发电的能量收集装置及控制系统和控制方法 |
| US11374502B2 (en) * | 2017-03-31 | 2022-06-28 | Case Western Reserve University | Power management for wireless nodes |
| US11229800B2 (en) * | 2019-03-12 | 2022-01-25 | Cairdac | Piezoelectric energy harvester including a monitoring circuit for detecting harvester alteration or downgrading |
| US11526182B2 (en) * | 2019-03-25 | 2022-12-13 | Cbn Nano Technologies Inc. | Sensing and operation of devices in viscous flow using derived parameters to reduce data-handling requirements |
-
2020
- 2020-05-15 EP EP20727945.6A patent/EP3939099A1/de not_active Withdrawn
- 2020-05-15 CN CN202080035993.XA patent/CN113795934A/zh active Pending
- 2020-05-15 US US17/608,231 patent/US20220216811A1/en active Pending
- 2020-05-15 JP JP2021567960A patent/JP2022532208A/ja active Pending
- 2020-05-15 WO PCT/EP2020/063645 patent/WO2020229671A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| US20220216811A1 (en) | 2022-07-07 |
| CN113795934A (zh) | 2021-12-14 |
| WO2020229671A1 (de) | 2020-11-19 |
| JP2022532208A (ja) | 2022-07-13 |
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