CN115208237A - Wearable piezoelectric energy collection management system - Google Patents
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/32—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/50—Charging of capacitors, supercapacitors, ultra-capacitors or double layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Abstract
The invention discloses a wearable piezoelectric energy collection management system, which comprises a piezoelectric transduction module, an electric energy management module and an energy storage module which are sequentially connected; the piezoelectric transduction module is arranged at a motion joint part of a wearer and used for converting energy generated by the motion of the joint of the wearer into sine wave voltage; the electric energy management module is used for converting the sine wave voltage into direct current voltage and converting the direct current voltage signal into standard voltage capable of supplying power to the intelligent wearable equipment; the energy storage module is used for storing the standard voltage output by the electric energy management module. According to the intelligent wearable device, the piezoelectric transduction module is used for converting energy generated by movement of a wearer into electric energy, the electric energy is processed by the electric energy management module and then standard voltage is output, the intelligent wearable device can be directly powered, when the user does not wear the intelligent wearable device, the electric energy converted by the piezoelectric transduction module can be stored through the energy storage module, and the intelligent wearable device can be conveniently powered when the user does not move.
Description
Technical Field
The invention belongs to the technical field of energy collection, and particularly relates to a wearable piezoelectric energy collection management system.
Background
In recent two years, wearable products show blowout type development, from intelligent watches represented by Galaxy Gear to sports health wristbands represented by Jawbone UP, and the like, and bring great convenience to daily life of people. However, due to the limited battery capacity of wearable devices, their effective operating time is between hours and days, requiring periodic recharging to maintain continuous operation of the device.
With the wide application of intelligent wearable equipment in the fields of medical treatment, military, internet of things and the like, the wearable energy collector becomes a research hotspot of scholars at home and abroad. With the continuous improvement of the integration level of microelectronic systems, wearable devices become reality, which becomes a hot issue in the fields of commerce, medical treatment, etc. The wearable energy collector supplies power to the wearable energy collector, and compared with other modes, the wearable energy collector has more advantages. Therefore, the design and implementation of the wearable energy collector become important guarantees for the wide application of wearable equipment.
Wearable energy collectors on the market at present mainly have following shortcoming:
1) The loss in the process of energy collection and storage is large, and the energy collection efficiency and the energy storage efficiency are low;
2) The energy collector is not well attached to the human body, and has certain influence on the motion of the human body;
3) The energy collector has single function and does not have other functions such as electric quantity detection and the like;
4) In a low-voltage state, certain problems exist in supplying power to electronic elements;
in view of the above technical drawbacks, it is desirable to provide a wearable piezoelectric energy harvesting management system.
Disclosure of Invention
The invention aims to provide a wearable piezoelectric energy collection and management system aiming at the problems in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
according to one aspect of the invention, a wearable piezoelectric energy collection and management system is provided, which comprises a piezoelectric energy conversion module, an electric energy management module and an energy storage module which are connected in sequence;
the piezoelectric transduction module is arranged at a motion joint part of a wearer and used for converting energy generated by the motion of the joint of the wearer into sine wave voltage;
the electric energy management module is used for converting the sine wave voltage into direct current voltage and converting the direct current voltage signal into standard voltage capable of supplying power to the intelligent wearable equipment;
the energy storage module is used for storing the standard voltage output by the electric energy management module.
According to the intelligent wearable device, the energy generated by movement of a wearer is converted into the electric energy through the piezoelectric transduction module, the electric energy is processed by the electric energy management module and then standard voltage is output, the intelligent wearable device can be directly powered, when a user does not wear the intelligent wearable device, the electric energy converted by the piezoelectric transduction module can be stored through the energy storage module, and the intelligent wearable device can be conveniently powered when the user does not move.
Specifically, the piezoelectric transduction module comprises at least one piezoelectric transduction unit, the piezoelectric transduction unit comprises a PVDF piezoelectric film and an arc-shaped substrate, and the PVDF piezoelectric film is adhered to the arc-shaped substrate through an insulating coating. According to the invention, energy generated by joint movement of a wearer is converted into electric energy through the PVDF piezoelectric film, the arc-shaped substrate can be more fit with the outline of a human joint part, and the influence of the piezoelectric transduction module on the movement of the wearer is reduced.
Furthermore, the piezoelectric transduction module comprises a plurality of piezoelectric transduction units, the piezoelectric transduction units are arranged in an m x n array mode, the piezoelectric transduction units on the same row are connected in a series mode, the collected electric energy voltage value can be increased in the series mode, the piezoelectric transduction units on each row after being connected in series are connected in a parallel mode, the collected electric energy current value can be increased in the parallel mode, and therefore the collected electric energy power value is increased.
Specifically, the electric energy management module comprises a voltage-multiplying rectification circuit and a power supply management chip, wherein the voltage-multiplying rectification circuit is used for rectifying and amplifying sine wave voltage output by the piezoelectric energy conversion module; the power management chip is used for reducing and stabilizing the direct-current voltage output by the voltage-doubling rectifying circuit and outputting standard voltage.
Specifically, the energy storage module comprises an energy storage capacitor, a switch and a super capacitor, wherein the switch and the super capacitor are connected in series and then connected in parallel at two ends of the energy storage capacitor; the standard voltage output by the electric energy management module is firstly stored in the energy storage capacitor, and when the voltage of the energy storage capacitor reaches a preset value, the switch is closed, so that the electric energy on the energy storage capacitor is transferred to the super capacitor. According to the invention, the electric energy output by the electric energy management module is firstly stored on the energy storage capacitor by adopting a pumping method, and after the energy storage capacitor is full, the electric charge on the energy storage capacitor is transferred to the super capacitor for storage, so that the electric energy loss in the charging process is reduced, and the charging efficiency is improved. The pumping method has the advantages that the resistance value and the power of the current-limiting resistor are small, and the electric energy loss during charging is small. Charging the super capacitor directly results in a significant pull-down of the charging power supply voltage (the super capacitor has a "short-circuit" effect), thereby affecting the charging efficiency.
Specifically, the energy collection management system further comprises an electric quantity detection module and a wireless communication module, wherein the electric quantity detection module is respectively connected with the energy storage module and the wireless communication module; the electric quantity detection module is used for detecting the electric quantity information of the energy storage module; the wireless communication module is in wireless connection with the user intelligent terminal and is used for sending the electric quantity information of the energy storage module to the user intelligent terminal. Through setting up electric quantity detection module and wireless communication module, can send the electric quantity information of energy storage module for user intelligent terminal in real time, the user of being convenient for looks over the electric quantity of energy storage module.
Furthermore, the electric quantity detection module comprises a current acquisition unit, a voltage acquisition unit, an A/D conversion unit and a data processing unit, wherein the current acquisition unit and the voltage acquisition unit are respectively used for acquiring a current signal and a voltage signal of the input end of the energy storage module, and the current signal and the voltage signal are converted into digital signals through the A/D conversion unit; and the data processing unit is used for processing the digital signals and analyzing the digital signals to obtain the electric quantity information of the energy storage module.
Furthermore, wireless communication module is the bluetooth chip, and the bluetooth chip has advantages such as small, be convenient for integrated, low power dissipation, with low costs, interference killing feature are strong.
According to another aspect of the present invention, there is provided a wearable piezoelectric energy harvesting management method, comprising:
the method comprises the following steps that a piezoelectric transduction module is installed at a motion joint part of a wearer, and when the wearer moves, the piezoelectric transduction module converts energy generated by the motion of the joint of the wearer into sine wave voltage and outputs the sine wave voltage;
the sine wave voltage output by the piezoelectric transduction module is rectified, amplified, reduced and stabilized by the electric energy management module, and standard voltage capable of supplying power to intelligent wearable equipment is output;
and storing the standard voltage output by the electric energy management module through an energy storage module.
Specifically, after the standard voltage output by the electric energy management module is stored in the energy storage module, the electric quantity information of the energy storage module is acquired through the electric quantity acquisition module, and the electric quantity information of the energy storage module is sent to the user intelligent terminal through the wireless communication module to be displayed.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the intelligent wearable device, the energy generated by movement of a wearer is converted into the electric energy through the piezoelectric transduction module, the electric energy is processed by the electric energy management module and then standard voltage is output, the intelligent wearable device can be directly powered, when a user does not wear the intelligent wearable device, the electric energy converted by the piezoelectric transduction module can be stored through the energy storage module, and the intelligent wearable device can be conveniently powered when the user does not move;
(2) The piezoelectric transduction unit comprises a PVDF piezoelectric film and an arc-shaped substrate, wherein the PVDF piezoelectric film is adhered to the arc-shaped substrate through an insulating coating, and the arc-shaped substrate can be more attached to the outline of a joint part of a human body, so that the influence of a piezoelectric transduction module on the movement of a wearer is reduced;
(3) The multiple piezoelectric transduction units are arranged in an mxn array mode, the piezoelectric transduction units in the same row are connected in series, the collected electric energy voltage value can be increased in the series mode, the piezoelectric transduction units in each row after series connection are connected in parallel, the collected electric energy current value can be increased in the series mode, and therefore the collected electric energy power value is increased;
(4) According to the invention, the electric energy output by the electric energy management module is stored on the energy storage capacitor firstly by adopting a pumping method, and after the energy storage capacitor is full, the electric charge on the energy storage capacitor is transferred to the super capacitor for storage, so that the electric energy loss in the charging process is reduced, and the charging efficiency is improved;
(5) The electric energy management module can be directly connected with the intelligent wearable device, the electric energy converted by the piezoelectric transduction module is directly used for supplying power to the intelligent wearable device, and the electric energy management module can also be connected with the energy storage module to store the electric energy converted by the piezoelectric transduction module for standby so as to supply power to the intelligent wearable device through the energy storage module when a user does not move.
Drawings
Fig. 1 is a schematic circuit diagram of a wearable piezoelectric energy harvesting management system according to the present invention.
Fig. 2 is a schematic structural diagram of a piezoelectric transduction unit in an embodiment of the present invention.
Fig. 3 is a block diagram illustrating a structure of a power detection module according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of the operation of the bluetooth module according to the embodiment of the present invention.
Fig. 5 is a schematic flow chart of a wearable piezoelectric energy collection management method according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the present embodiment provides a wearable piezoelectric energy collection management system, which includes a piezoelectric transduction module, an electric energy management module, and an energy storage module, which are connected in sequence;
in this embodiment, the input end of the energy storage module is detachably connected with the output end of the electric energy management module, when a user wearing the intelligent wearable device moves, the energy storage module can be detached from the output end of the electric energy management module, the output end of the electric energy management module is connected with the charging end of the intelligent wearable device, and the standard voltage is directly output through the electric energy management module to supply power to the intelligent wearable device; when the user did not wear intelligent wearing equipment, can be connected energy storage module's input and electric energy management module's output, when the user motion, the electric energy of piezoelectricity transduction module conversion is output standard voltage and is stored in energy storage module after electric energy management module handles, when being convenient for wear intelligent wearing equipment when not moving as the user, can directly give intelligent wearing equipment power supply through energy storage module, in this embodiment, energy storage module is equivalent to the treasured that charges, and piezoelectricity transduction module is equivalent to power supply.
The piezoelectric transduction module is arranged at the knee joint of a wearer, and particularly can be adhered to a sports knee pad, and the wearer wears the sports knee pad adhered with the piezoelectric transduction module;
specifically, as shown in fig. 2, the piezoelectric transduction module includes four piezoelectric transduction units, the piezoelectric transduction unit includes PVDF piezoelectric film and arc base plate, PVDF piezoelectric film passes through the insulating coating adhesion on the arc base plate, and the arc base plate can more laminate the profile at human joint position, reduces the influence of piezoelectric transduction module to the wearer motion. The arc-shaped substrate is a metal elastic substrate, when a wearer walks or runs, when knees are bent, the stress of the arc-shaped substrate subjected to pre-bending is gradually increased, the bending degree of the arc-shaped substrate is also gradually increased, and the PVDF piezoelectric film adhered to the arc-shaped substrate through the insulating coating can generate larger deformation along with the bending; when the knee is straightened, the stress of the arc-shaped substrate is gradually reduced until the arc-shaped substrate disappears (when the knee is completely straightened, the stress of the arc-shaped substrate disappears), the bending degree of the arc-shaped substrate is quickly reduced under the action of self elastic recovery and the drive of the knee joint until the bending degree of the arc-shaped substrate is restored to the pre-bending degree, and the PVDF piezoelectric film can be quickly driven to restore the original shape; the PVDF piezoelectric film continuously outputs small approximate sine wave signals in the repeated bending and recovery processes, four piezoelectric transduction units are arranged in a 2 multiplied by 2 array mode, the piezoelectric transduction units on the same row are connected in a series mode, the collected electric energy voltage value can be increased in the series mode, two rows of piezoelectric transduction units connected in series are connected in a parallel mode, the collected electric energy current value can be increased in the parallel mode, the four small sine wave signals are combined into one large sine wave signal, the collected electric energy power value is increased, and the electric energy power value is output to the electric energy management module.
The electric energy management module is used for converting the sine wave voltage into direct current voltage and converting the direct current voltage signal into standard voltage capable of supplying power to the intelligent wearable equipment;
specifically, the electric energy management module comprises a voltage-multiplying rectification circuit and a power supply management chip, wherein the voltage-multiplying rectification circuit is used for rectifying and amplifying sine wave voltage output by the piezoelectric energy conversion module; the power management chip is used for reducing and stabilizing the direct-current voltage output by the voltage-doubling rectifying circuit and outputting 5V standard voltage.
In this embodiment, the electric energy management module includes:
voltage-stabilizing diodes D1, D2, D3, D4;
electrolyte capacitors C1, C2, C3, C4, C7;
capacitors C5, C6;
the inductor L1 and the power management chip LTC3588-1;
the connection of the electronic components is shown in fig. 1.
The energy storage module is used for storing the standard voltage output by the electric energy management module;
specifically, the energy storage module includes:
an energy storage capacitor C8;
a switch S1;
a button-type super capacitor Cs;
a diode D5;
resistors R1, R2, R3;
the connection mode of each electronic element is shown in FIG. 1; in this embodiment, a pumping method is adopted to pre-store the electric energy output by the electric energy management module in the energy storage capacitor C8, and when the electric quantity of the energy storage capacitor C8 reaches a preset value (i.e., an electric quantity limit value that the energy storage capacitor C8 can store), the switch S1 is manually closed, so that the electric energy on the energy storage capacitor C8 is quickly transferred to the super capacitor Cs; energy storage capacitor C8 can accomplish the task of collecting the electric charge, and super capacitor Cs can be better for the power supply of wearable equipment, through energy storage capacitor C8 and super capacitor Cs's cooperation, has improved the electric energy and has collected storage efficiency.
In the embodiment, the super capacitor Cs has high charging and discharging efficiency, long cycle service life and high energy density, and an overcharge protection circuit is not needed. The self-discharge of the super capacitor Cs is more obvious than that of a battery, and the voltage of the super capacitor Cs is respectively reduced to 80%, 65% and 40% of the original voltage after 10 days, 30 days and 60 days. The super capacitor Cs is charged to a lower voltage than when charged to a higher voltage at a slower rate of discharge.
Specifically, the energy collection management system further comprises an electric quantity detection module and a wireless communication module, wherein the electric quantity detection module is respectively connected with the energy storage module and the wireless communication module; the electric quantity detection module is used for detecting the electric quantity information of the energy storage module; the wireless communication module is in wireless connection with the user intelligent terminal and is used for sending the electric quantity information of the energy storage module to the user intelligent terminal. Through setting up electric quantity detection module and wireless communication module, can send the electric quantity information of energy storage module for user intelligent terminal in real time, the user of being convenient for looks over the electric quantity of energy storage module, properly utilizes the electric quantity of storage in the energy storage module, provides the energy for wearable equipment, wireless sensor or some MEMS systems.
Further, as shown in fig. 3, the electric quantity detection module includes a current collection unit, a voltage collection unit, an a/D conversion unit and a data processing unit MCU, where the current collection unit and the voltage collection unit are respectively used to collect a current signal and a voltage signal at an input end of the energy storage module, and the current signal and the voltage signal are converted into digital signals through the a/D conversion unit; and the data processing unit MCU is used for processing the digital signals and analyzing to obtain the electric quantity information of the energy storage module.
By acquiring the current value and the voltage value of the input end of the energy storage module, the charge quantity F1 transmitted to the energy storage capacitor C8 by the electric energy management module can be calculated, the numerical value of the charge quantity is the product of the current value of the input end of the energy storage module and time, meanwhile, the maximum charge quantity F2 which can be stored by the energy storage capacitor C8 can be calculated, the numerical value of the maximum charge quantity is the product of the capacitance value of the energy storage capacitor C8 and the voltage value of the input end of the energy storage module, the charge quantity F1 transmitted to the energy storage capacitor C8 by the electric energy management module and the maximum charge quantity F2 which can be stored by the energy storage capacitor C8 are compared, when F1= F2, the switch S1 can be manually closed, and the super capacitor Cs is charged through the energy storage capacitor C8; after a period of time (the discharge time of the energy storage capacitor C8), the switch S1 is manually turned off, and the energy storage capacitor C8 is continuously charged, so that the cycle is repeated until the super capacitor Cs is full, and the number of times for specifically turning on and off the switch S1 can be determined according to the ratio of the super capacitor Cs to the amount of the stored charge of the energy storage capacitor C8.
Furthermore, the wireless communication module is a Bluetooth chip HC-05, and the Bluetooth chip has the advantages of small size, convenience in integration, low power consumption, low cost, strong anti-interference capability and the like.
The working process of the bluetooth chip HC-05 is as shown in fig. 4, the data processing unit MCU sends serial data containing electric quantity information to the bluetooth chip HC-05 through the TXD port, when the RXD port of the bluetooth chip HC-05 receives the data, the data is automatically sent to the air again in a radio wave manner, and at this time, the user intelligent terminal (mobile phone) can receive the radio wave in the air through bluetooth and restore the serial data which is sent at first, and finally, the electric quantity information is obtained.
As shown in fig. 5, the present embodiment further provides a wearable piezoelectric energy harvesting management method, including:
the piezoelectric transduction module is arranged at the knee joint part of a wearer, and particularly can be adhered to a sports knee pad, and the wearer wears the sports knee pad adhered with the piezoelectric transduction module; when a wearer moves, the piezoelectric transduction module converts energy generated by joint movement of the wearer into approximate sine wave voltage and outputs the approximate sine wave voltage;
rectifying and amplifying sine wave voltage output by the piezoelectric transduction module through a voltage doubling rectifying circuit in the electric energy management module to finally obtain a larger direct current voltage signal;
the direct-current voltage signal is input to the input end of the power management chip LCT358-1, and the voltage reduction and stabilization functions of the LCT358-1 chip are utilized to reduce the larger direct-current voltage to the standard voltage of 5V for output;
and storing the standard voltage output by the electric energy management module through an energy storage module.
Specifically, after the standard voltage output by the electric energy management module is stored in the energy storage module, the current value and the voltage value of the input end of the energy storage module are obtained through the electric quantity acquisition module, the acquired current value and the acquired voltage value are analyzed by the data processing unit MCU to obtain electric quantity information, the electric quantity information is sent to a user intelligent terminal (mobile phone) through the wireless communication module to be displayed, and a user closes the switch S1 according to the electric quantity information (after the electric quantity of the energy storage capacitor reaches a preset value), and the electric energy stored in the energy storage capacitor C8 is transferred to the super capacitor Cs to be stored.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A wearable piezoelectric energy collection management system is characterized by comprising a piezoelectric transduction module, an electric energy management module and an energy storage module which are sequentially connected;
the piezoelectric transduction module is arranged at a motion joint part of a wearer and used for converting energy generated by the motion of the joint of the wearer into sine wave voltage;
the electric energy management module is used for converting the sine wave voltage into direct current voltage and converting the direct current voltage signal into standard voltage capable of supplying power to the intelligent wearable equipment;
the energy storage module is used for storing the standard voltage output by the electric energy management module.
2. The wearable piezoelectric energy harvesting management system of claim 1, wherein the piezoelectric transduction module comprises at least one piezoelectric transduction unit, and the piezoelectric transduction unit comprises a PVDF piezoelectric film and an arc-shaped substrate, and the PVDF piezoelectric film is adhered to the arc-shaped substrate through an insulating coating.
3. The wearable piezoelectric energy collection and management system according to claim 2, wherein the piezoelectric transduction module comprises a plurality of piezoelectric transduction units, the plurality of piezoelectric transduction units are arranged in an m x n array, the piezoelectric transduction units in the same row are connected in series, and the piezoelectric transduction units in each row after series connection are connected in parallel.
4. The wearable piezoelectric energy collection and management system according to claim 1, wherein the power management module comprises a voltage doubling rectifier circuit and a power management chip, and the voltage doubling rectifier circuit is used for rectifying and amplifying sine wave voltage output by the piezoelectric transduction module; the power management chip is used for reducing and stabilizing the direct-current voltage output by the voltage-doubling rectifying circuit and outputting standard voltage.
5. The wearable piezoelectric energy collection and management system according to claim 1, wherein the energy storage module comprises an energy storage capacitor, a switch and a super capacitor, and the switch and the super capacitor are connected in series and then connected in parallel at two ends of the energy storage capacitor; the standard voltage output by the electric energy management module is firstly stored in the energy storage capacitor, and when the voltage of the energy storage capacitor reaches a preset value, the switch is closed, so that the electric energy on the energy storage capacitor is transferred to the super capacitor.
6. The wearable piezoelectric energy collection and management system according to claim 1, further comprising an electric quantity detection module and a wireless communication module, wherein the electric quantity detection module is respectively connected with the energy storage module and the wireless communication module; the electric quantity detection module is used for detecting the electric quantity information of the energy storage module; the wireless communication module is in wireless connection with the user intelligent terminal and is used for sending the electric quantity information of the energy storage module to the user intelligent terminal.
7. The wearable piezoelectric energy collection and management system according to claim 6, wherein the electric quantity detection module comprises a current collection unit, a voltage collection unit, an A/D conversion unit and a data processing unit, the current collection unit and the voltage collection unit are respectively used for collecting current signals and voltage signals of the input end of the energy storage module, and the current signals and the voltage signals are converted into digital signals through the A/D conversion unit; and the data processing unit is used for processing the digital signals and analyzing the digital signals to obtain the electric quantity information of the energy storage module.
8. The wearable piezoelectric energy harvesting management system of claim 6, wherein the wireless communication module is a Bluetooth chip.
9. A wearable piezoelectric energy collection management method, based on any one of claims 1 to 8, of a wearable piezoelectric energy collection management system, comprising the following steps:
the method comprises the following steps that a piezoelectric transduction module is installed at a moving joint part of a wearer, and when the wearer moves, the piezoelectric transduction module converts energy generated by the movement of the joint of the wearer into sine wave voltage to be output;
the sine wave voltage output by the piezoelectric transduction module is rectified, amplified, reduced and stabilized by the electric energy management module, and standard voltage capable of supplying power to intelligent wearable equipment is output;
and storing the standard voltage output by the electric energy management module through an energy storage module.
10. The wearable piezoelectric energy collection and management method according to claim 9, wherein after the standard voltage output by the electric energy management module is stored in the energy storage module, the electric quantity information of the energy storage module is acquired through the electric quantity acquisition module, and the electric quantity information of the energy storage module is sent to the user intelligent terminal through the wireless communication module for display.
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