KR101648261B1 - Device, system and method for energy harvesting - Google Patents

Abstract

An energy harvesting apparatus includes an electromagnetic induction device including a coil and a magnet moving within the coil, the electromagnetic induction device generating a change in magnetic flux inside the coil by the movement to generate electric power, A transmitting apparatus for transmitting the transmitted power in a self-resonant wireless transmission scheme, and a receiving apparatus for receiving the transmitted power in a self-resonant wireless transmission scheme.

Description

TECHNICAL FIELD [0001] The present invention relates to an energy harvesting apparatus, a system and a method,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an energy harvesting apparatus, system and method, and more particularly, to an energy harvesting apparatus, an energy harvesting apparatus, an energy harvesting apparatus, and an energy harvesting apparatus capable of producing electric power using electromagnetic induction phenomenon, , Systems and methods.

Energy harvesting (environmental power generation) technology refers to the conversion of environmental energy such as kinetic energy, light energy, and thermal energy into electric power by using piezoelectric elements, solar cells, thermoelectric elements, and electromagnetic induction. The electric power thus obtained is stored and used as a power source for various power consumption devices.

In this connection, in Korean Patent Application No. 10-2008-0071292, a piezoelectric element is installed in the sole of a shoe, the electric power is generated through the piezoelectric element, and then the LED is emitted by using the electric power produced to sterilize the inside of the shoe Describes functional self-propelled shoes.

However, in the present invention, instead of transmitting the electric power produced by the piezoelectric element inside the shoe to a separate device via a wireless system, the present invention provides the electric power produced by the energy harvesting Is narrow, and as a result, the utilization value in the real life is reduced. In addition, the above-mentioned invention of the present application uses a piezoelectric element and does not relate to an electromagnetic induction device using an electromagnetic induction method.

In order to solve these problems, there is a need for an energy harvesting apparatus, system, and method that can easily generate electric power by using an electromagnetic induction apparatus and efficiently transmit the produced electric power to a receiving apparatus through a wireless system.

A problem to be solved by the present invention is to provide an energy harvesting apparatus, system, and method that can easily produce electric power through electromagnetic induction in real life and efficiently transmit the generated electric power to a receiving apparatus in a wireless manner .

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other matters not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided an energy harvesting apparatus including a coil and a magnet moving inside the coil, wherein a magnetic flux is changed inside the coil to generate electric power An electromagnetic induction device, a transmission device for transmitting power generated by the electromagnetic induction device by a self-resonant radio transmission method, and a reception device for receiving the transmitted power by a self-resonant radio transmission method.

According to an aspect of the present invention, there is provided an energy harvesting system including a coil, a magnet moving inside the coil, and a spring disposed on a moving path of the magnet, The energy harvester portion having an induction device is characterized in that a magnet moving in one direction by the pressure of the foot in a process of raising and lowering a foot of the shoe moves in a direction to return back by the spring, And a radio transmitter installed in the shoe and transmitting the power generated by the energy harvester in a self-resonant radio transmission system.

According to an aspect of the present invention, there is provided an energy harvesting method comprising: a magnetic induction device including a coil and a magnet moving inside the coil; Generating a power, transmitting a power generated by the electromagnetic induction device to a receiving device by a self-resonant wireless transmission method, and receiving the transmitted power by a self-resonant wireless transmission method .

Other specific details of the invention are included in the detailed description and drawings.

According to the present invention, it is possible to provide an energy harvesting apparatus, system, and method that can easily produce electric power through electromagnetic induction in real life and efficiently transmit the generated electric power to a receiving apparatus in a wireless manner.

1 is a schematic view of an electromagnetic induction apparatus used in an energy harvesting apparatus, system and method according to the present invention.
2 is a schematic diagram of a transmitting apparatus and a receiving apparatus used in an energy harvesting apparatus, system and method according to the present invention.
Figures 3 and 4 are schematic diagrams of an energy harvesting system according to a first embodiment of the present invention.
5 is a flowchart of an energy harvesting method according to the first embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is noted that the terms " comprises "and / or" comprising ", as used herein, do not exclude the presence or addition of one or more other elements, steps and operations.

1 and 2, an energy harvesting apparatus according to a first embodiment of the present invention will be described. 1 is a schematic view of an electromagnetic induction apparatus used in an energy harvesting apparatus, system and method according to the present invention. 2 is a schematic diagram of a transmitting apparatus and a receiving apparatus used in an energy harvesting apparatus, system and method according to the present invention.

1 and 2, an energy harvesting apparatus according to a first embodiment of the present invention includes an electromagnetic induction device 40, an elastic device, a transmission device 50, a reception device 70, a sensing device, and an alarm device .

The electromagnetic induction device 40 is a device that generates electric power by using an electromagnetic induction phenomenon. The electromagnetic induction phenomenon is a phenomenon in which a voltage is induced and a current flows when a magnetic field is changed around a conductor. It is proportional to the number of wires wound on the coil and the rate of change of the magnetic field passing through the coil per hour.

The electromagnetic induction device 40 includes a coil 20 and a magnet 10 moving inside the coil 20 so that the magnet 10 is wound on the coil 20, As the magnet 10 moves into or out of the coil 20 or changes in magnetic flux passing through the coil 20 occurs, electric power is generated.

The elastic device may be positioned on the movement path of the magnet 10 while being spaced apart from the one end of the magnet 10 by a predetermined distance so that the magnet 10 is moved in one direction in the coil 20 10 in the returning direction, and a spring 30 may be used as the elastic device.

The transmitting device 50 is a device for transmitting the electric power produced by the electromagnetic induction device 40 to the receiving device 70 in a self resonant radio transmission system. The transmitting device 50 includes a source coil 55 and a transmitting- And may include a coil 60. The source coil 55 may be connected to the coil 20 of the electromagnetic induction device 40 by wire and may receive the power generated by the electromagnetic induction device 40 and may receive the power generated by the electromagnetic resonance coil 60 through magnetic induction, As shown in FIG. Further, the transmission-side resonance coil 60 can resonate the power induced through the source coil 55 through self-resonance and transmit it to the reception device 70.

On the other hand, the radio transmission system includes a magnetic induction system in a short distance, a self resonance system, and an electromagnetic wave transmission system. The self-resonant radio power transmission technology used in the present invention is capable of transmitting energy at a greater distance than the conventional magnetic induction system and has a higher transmission efficiency than the microwave electromagnetic radiation system.

Such a self-resonant wireless power transmission technology is a technique of transmitting power using an attenuator wave phenomenon in which electromagnetic waves are generated when two media (resonant coils) resonate at the same frequency, to be.

The receiving apparatus 70 is an apparatus for receiving the power transmitted by the transmitting apparatus 50 in the self resonant radio transmission system. The receiving apparatus 70 includes a receiving-side resonant coil 75 and a load coil 80 . The receiving-side resonant coil 75 receives the power transmitted through the self-resonance from the transmitting device 50, and can have a helical or spiral structure. Further, the load coil 80 can be supplied with power from the receiving-side resonant coil 75 through magnetic induction, and can supply the supplied power to the load device 90 or one or more devices of the charging device, (90) may include a tablet PC, a mobile phone, and a notebook.

The sensing device is a device for sensing the presence and position of the receiving device 70. As described above, the electric power produced by the electromagnetic induction device 40 is transmitted through the transmitting device 50 to the receiving device 70. In order for the power to be transmitted, the presence and the location of the receiving device 70 must be prioritized, and the sensing device performs such a role. The sensing device may include a sensor for detecting a change in capacitance or a change in resonance frequency, and the presence and position of the nearby receiving device 70 are sensed through the sensor.

The alarm device is a device for notifying the detection result when the sensing device senses the presence and the position of the receiving device 70. There may be a notification sound or vibration in a manner of notifying the sensing device that the sensing device .

The energy harvesting apparatus according to the first embodiment of the present invention has been described above. Hereinafter, the energy harvesting system according to the first embodiment of the present invention in which such an energy harvesting apparatus is applied to the shoe 100 will be described.

Referring to Figures 3 and 4, Figures 3 and 4 are schematic diagrams of an energy harvesting system according to a first embodiment of the present invention.

3 and 4, the energy harvesting system according to the first embodiment of the present invention may include an energy harvester unit, a wireless transmission unit, and a wireless reception unit.

The energy harvester part generates electric power and rectifies and charges the generated electric power. The energy harvester part may include an electromagnetic induction device, a rectifying part, a battery part, a sensing part, an alarm part, a display part and a control part.

The electromagnetic induction apparatus includes a coil 120, a magnet 110 moving in the coil 120, and a spring 130 positioned on the movement path of the magnet 110 ). The electromagnetic induction device may be installed in the first and second storage spaces 150 and 155 formed in the inside of the shoe 100 and particularly in the shoe sole 100. Specifically, 1 storage space 150 in which the coil 120 and the magnet 110 moving within the coil 120 can be positioned and the second storage space 150 beneath the first storage space 150, A spring 130 may be received in the housing 155. In some cases, the coil 120, the magnet 110 and the spring 130 may be housed in a single storage space.

The process of producing the electric energy by the electromagnetic induction device of the energy harvester part is as follows. When the wearer of the shoe 100 raises or lowers the feet or moves the feet, the first storage space 150 And the spring 130 in the second storage space 155 moves the magnet 110 moving downward in the direction of returning upward so that the magnet 110 ) Is repeated so that the magnetic field or the magnetic flux is changed in the coil 120 to produce electric power.

In this way, since the electromagnetic induction device is installed in the shoe 100 which is frequently worn in everyday life, and electric power can be produced through general and simple movements such as walking or running, electric generation using the electromagnetic induction phenomenon is easy and easy There is an advantage.

The rectifying part rectifies the electric power produced by the electromagnetic induction device, and the battery part charges the rectified electric power in the rectifying part. The rectifying part and the battery part may be installed on the soles of the shoe 100 or other parts of the shoe 100, and there is no limitation on the installation position.

The sensing unit senses the presence and position of a wireless receiving unit that receives a power transmitted from a wireless transmitting unit, which will be described later. As described above, the power generated by the energy harvesting unit is transmitted through a wireless transmitting unit, In order for the power to be transmitted, the presence and position of the wireless receiver must be prioritized, and the sensing unit is assumed to perform such a role.

The sensing unit may include a sensor that senses a change in capacitance or a change in resonance frequency, and senses the presence and position of a nearby wireless receiver through the sensor. The sensing unit may be installed on the soles of the shoe 100 or other parts of the shoe 100, and there is no limitation on the installation position.

The alarm unit plays a role of notifying the detection result when the sensing unit detects the presence and the position of the wireless receiving unit. In the method of notifying the sensing result, there may be a notification sound or vibration, and these two methods can be used together . For example, the alarm unit may generate an alarm sound so that the wearer of the shoe 100 may recognize the proximity of the wireless receiving unit by listening to the alarm, or may sense the proximity of the wireless receiving unit by sensing the vibration generated by the alarm unit. In addition, the alarm unit includes a light source such as an LED, so that the wearer can recognize the fact that the wearer is adjacent to the wearer by emitting light, and the light emission method can be particularly effective at night. Such an alarm unit can be installed in the soles of the shoe 100 or other parts of the shoe 100, and there is no limitation on the installation position.

Thus, the wearer is aware that it is necessary to keep the distance between the constituent parts of the energy harvesting system constant so that the wireless power transmission can be performed well. Thus, Attention can be paid so that the distance between the respective components can be a distance at which the wireless power transmission can be performed without interruption while the power being transmitted to the wireless receiver through the wireless transmitter.

The display unit displays the amount of power charged in the battery unit, the presence and position information of the wireless receiving unit sensed by the sensing unit, and the power transmission status information to the wireless receiving unit. Specifically, And the degree of change of the amount of power charged in the display screen, the distance between the energy harvesting unit and the wireless receiving unit, and the amount of power transferred can be displayed. Thus, the wearer can quickly and easily confirm the information related to the wireless power transmission through the display unit.

The control unit adjusts the overall relationship between the electromagnetic induction unit, the rectifying unit, the battery unit, the sensing unit, the alarm unit, and the display unit that form the energy harvester unit. Specifically, the electromagnetic induction unit generates electric power, rectifies the generated electric power So that the rectified DC power is charged by the battery, the proximity of the wireless reception unit is sensed to the sensing unit, and the alarm unit informs the wearer of the detection of the alarm sound, vibration or light emission.

The energy harvester part of the energy harvesting system has been described above, and the following describes the wireless transmitting part and the wireless receiving part.

The wireless transmitter may transmit the power generated by the energy harvester to the wireless receiver through a self-resonant wireless transmission scheme. The wireless transmitter transmits the power generated by the energy harvester to the inside of the shoe 100, May be accommodated in the storage space 160 and may be connected by wire to the coil 120 of the energy harvesting unit.

In addition, the radio transmission unit may include a source coil and a transmission-side resonant coil 140 for wireless transmission. The source coil may be connected to the coil 120 of the energy harvester part by wire, and the power produced by the energy harvester part may be received and provided to the transmission side resonance coil 140 through magnetic induction. Thereafter, the transmission-side resonance coil 140 can resonate the power induced through the source coil through self-resonance and transmit it to the radio receiver.

The radio receiving unit receives the power transmitted by the radio transmitting unit in the self-resonant radio transmission system, and the radio receiving unit includes the receiving-side resonant coil and the load coil. The receiving-side resonant coil receives the electric power transmitted through the self-resonance from the radio transmitter, and can have a helical or spiral structure. Further, the load coil can be supplied with electric power from the receiving-side resonant coil through magnetic induction, and can supply the supplied electric power to at least one of the load device or the charging device, and the load device can be a tablet PC, . ≪ / RTI >

In this regard, when a person wishing to jog is jogging while wearing the shoes 100 installed in the soles of the energy harvester unit and the wireless transmission unit and wearing the smartphone 170 equipped with the wireless receiver, The converted kinetic energy is converted into electric energy through the electromagnetic induction device and the converted electric energy is provided to the smartphone 170 so that the smartphone 170 can be used even without a separate battery.

Referring to FIG. 5, an energy harvesting method according to the first embodiment of the present invention will be described. 5 is a flowchart of an energy harvesting method according to the first embodiment of the present invention.

Referring to FIG. 5, the energy harvesting method according to the first embodiment of the present invention includes a step S10 of generating electric power using electromagnetic induction phenomenon, a step S20 of rectifying and charging the produced electric power, A step S30 of detecting the presence and position of the device, a step S40 of informing of detection, a step S50 of transmitting power in a self-resonant radio transmission system, and a step S60 ).

1 and 5, the step S10 of producing electric power using the electromagnetic induction phenomenon includes an electromagnetic induction device 40 including a coil 20 and a magnet 10 moving inside the coil 20, A change in the magnetic field or magnetic flux passing through the coil 20 occurs as the magnet 10 reciprocates within the coil 20 or as the magnet 10 is inserted into or withdrawn from the coil 20, Is produced.

Referring to FIG. 5, the step S20 of rectifying and charging the produced electric power can rectify the AC power to rectify the AC power after the electromagnetic induction apparatus 40 produces AC power. , And the rectified DC power is charged into the battery.

Referring to FIG. 5, the step S30 of detecting the presence and position of the receiving device is performed in order to transmit the charged power to the receiving device 70 after the battery is charged with electric power. The position and the position of the receiving apparatus 70 need to be detected. To this end, the sensing apparatus may include a sensor for sensing a change in capacitance or a change in resonance frequency, can do.

Referring to FIG. 5, in step S40, the detection device senses the presence of the reception device 70, and then the alarm device informs the wearer that the reception device 70 is close to the alarm sound, Lt; / RTI > In this way, the alarm device informs the wearer that the receiving device 70 has come close, so that the wearer can pay attention so that the wireless power transmission can be performed smoothly.

2 and 5, the step S60 of transmitting power in the self-resonant wireless transmission mode is performed when the sensing device senses the reception device 70 and the distance between the transmission device 50 and the reception device 70 is When the radio power transmission reaches a distance, the power can be transmitted from the transmitting device 50 to the receiving device 70 in a self-resonant radio power manner.

2 and 5, the step S60 of receiving power by the self-resonant radio transmission method is performed when the distance between the transmitting device 50 and the receiving device 70 becomes a distance enabling wireless power transmission, The receiver 70 may receive power from the transmitting device 50 in a self resonant wireless power scheme and the power received by the receiving device 70 may be supplied to one or more of the load device 90 or the charging device .

As described above, the energy harvesting method of the present invention can be installed in a shoe, uses an electromagnetic induction device capable of easily generating electric power using footsteps of a shoe wearer, and also has a long transmission distance and a high transmission efficiency The advantage of using the self-resonant wireless power transmission method is that the power productivity is excellent. There is also an alarm step to indicate that the receiving device is close to the transmitting device, so that the wearer or the user can take care to ensure smooth wireless power transmission.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

10, 110: magnets 20, 120: coil
30, 130: spring 40: electromagnetic induction device
50: transmitting device 55: source coil
60, 140: transmission side resonance coil 70: receiving device
75: receiving-side resonance coil 80: load coil
90: load device 100: shoes
150: first storage space 155: second storage space
160: third storage space 170: smart phone

Claims (20)

A device installed on a shoe,
And a magnet moving within the coil, wherein a first storage space and a second storage space are provided in an outsole of the shoe, a magnet moving in the coil and the coil is positioned in the first storage space, The first storage space and the second storage space are located vertically up and down so that the magnets provided in the first storage space are transferred to the shoe based on the activities of the shoe wearer, The magnet moves in the vertical downward direction by the pressure, and when the magnet moved in the vertical downward direction pushes the spring provided in the second storage space, the magnet moves in the direction to return back by the elasticity, An electromagnetic induction device for generating electric power by generating electric power;
A transmitter for transmitting power generated by the electromagnetic induction device to a receiver located at a predetermined distance from the shoe using a self-resonant radio transmission system;
A display unit for displaying existence information of the receiving apparatus, position information, and status information of power to be transmitted to the receiving apparatus;
A sensing device for sensing presence and position information of the receiving device; And
And an alarm device for notifying the fact that the shoe wearer is able to maintain a distance at which wireless power transmission is possible while the shoe wearer is transmitting power when the sensing device senses the presence and position of the receiving device,
The state information of the power may be,
Wherein the information about the degree of change of the amount of electric power transmitted according to the amount of change in pressure transmitted to the shoe. delete The method according to claim 1,
Wherein the transmitting device includes a source coil and a transmission-side resonant coil,
Wherein the source coil receives power generated by the electromagnetic induction device and provides the power to the transmission-side resonance coil through magnetic induction,
Wherein the transmission-side resonance coil resonates the induced power through self-resonance and transmits the resonance to the receiving device. The method of claim 3,
Wherein the coil of the electromagnetic induction device and the source coil are connected by wire. The method according to claim 1,
The receiving apparatus includes a receiving-side resonant coil and a load coil,
Wherein the receiving-side resonant coil receives the power from the transmitting apparatus through self-resonance,
And the load coil receives the electric power from the receiving-side resonant coil through magnetic induction. delete The method according to claim 1,
Wherein the sensing device senses a change in capacitance or a change in resonant frequency to sense the presence and position of the receiving device in the vicinity. delete The method according to claim 1,
Wherein the alarm device informs the detection using at least one of an alarm sound, vibration, and light emission of a light source. The method according to claim 1,
Wherein the power received by the receiving device is supplied to at least one of a load device and a charging device. 11. The method of claim 10,
Wherein the load device comprises a tablet PC, a mobile phone, and a notebook. An energy harvester unit having an electromagnetic induction unit installed inside a shoe and including a coil, a magnet moving inside the coil, and a spring located on a moving path of the magnet,
A first storage space and a second storage space are provided in the sole of the shoe, the magnet moving in the coil and the coil is located in the first storage space, the spring is accommodated in the second storage space, Wherein the first storage space and the second storage space are vertically vertically moved so that the magnet provided in the first storage space is moved vertically downward by the pressure transmitted to the shoe based on the activity of the shoe wearer, An energy harvester unit in which the magnet moved in the vertically downward direction moves in a direction to return back by elasticity when a spring provided in the second storage space is pushed to generate electric power by a change in magnetic flux in the coil; And
And a wireless transmission unit installed in the shoe and transmitting the power generated by the energy harvester unit by a self-resonant wireless transmission scheme,
The energy harvester portion
A display unit for displaying the presence of the wireless receiving unit to receive the generated power, position information, and status information of the power to be transmitted to the wireless receiving unit;
A sensing unit for sensing presence and position information of the wireless receiver; And
Further comprising an alarm unit for notifying the fact that the shoe wearer is able to maintain a distance at which wireless power transmission is possible while the shoe wearer is transmitting power when the sensing unit senses the presence and position of the wireless receiver,
The state information of the power may be,
Wherein the information about the degree of change of the amount of electric power transmitted according to a change amount of the pressure transmitted to the shoe. delete 13. The method of claim 12,
Wherein the sensing unit senses a change in capacitance or a change in a resonance frequency to sense the presence and the position of the nearby wireless receiver. delete 13. The method of claim 12,
Wherein the radio transmission unit includes a source coil and a transmission-side resonant coil,
Wherein the source coil receives power generated by the energy harvesting unit and provides the power to the transmission-side resonance coil through magnetic induction,
Wherein the transmission-side resonant coil resonates the induced power through self-resonance, and transmits the resonant coil to a wireless receiver for receiving the power. 17. The method of claim 16,
Wherein the coil of the electromagnetic induction device and the source coil are connected by a wire. A first storage space and a second storage space are provided in the sole of the shoe, and the first storage space is provided with the coil and the coil, Wherein the first storage space and the second storage space are vertically arranged in a vertical direction so that the magnets provided in the first storage space are spaced apart from the first storage space The magnet moves in the vertical downward direction by the pressure transmitted to the shoe based on the movement of the magnet, and the magnet moved in the vertical downward direction moves in the direction of returning back by the elasticity when the spring provided in the second storage space is pushed. Generating a power through a change in magnetic flux in the coil;
Transmitting a power generated by the electromagnetic induction apparatus to a receiving apparatus by a self-resonant wireless transmission scheme;
Receiving the transmitted power in a self-resonant wireless transmission scheme; And
The display unit displaying the presence information of the receiving apparatus, the position information, and status information of power to be transmitted to the receiving apparatus; / RTI >
The state information of the power may be,
The information about the degree of change in the amount of electric power transmitted according to the amount of change in the pressure transmitted to the shoe,
Wherein the step of generating the power or the step of receiving the power comprises:
Detecting presence and location information of the receiving device, and
Further comprising the step of informing the shoe wearer of the sensing fact so that when the sensing device senses the presence and position of the receiving device, the shoe wearer can maintain a distance at which the wireless power transmission is possible while the power is being transmitted. delete delete

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