KR20160026638A - Piezo-electric energy harvester and wireless switch including the same - Google Patents

Piezo-electric energy harvester and wireless switch including the same Download PDF

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Publication number
KR20160026638A
KR20160026638A KR1020150056709A KR20150056709A KR20160026638A KR 20160026638 A KR20160026638 A KR 20160026638A KR 1020150056709 A KR1020150056709 A KR 1020150056709A KR 20150056709 A KR20150056709 A KR 20150056709A KR 20160026638 A KR20160026638 A KR 20160026638A
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South Korea
Prior art keywords
pressure
elastic
energy harvester
piezoelectric
piezoelectric element
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KR1020150056709A
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Korean (ko)
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KR101740787B1 (en
Inventor
정인화
박종흠
김희욱
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삼성전기주식회사
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Priority to CN201510552634.2A priority Critical patent/CN105391340B/en
Priority to US14/842,147 priority patent/US10103651B2/en
Publication of KR20160026638A publication Critical patent/KR20160026638A/en
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Publication of KR101740787B1 publication Critical patent/KR101740787B1/en

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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • H05B37/02—

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  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)

Abstract

According to an embodiment of the present invention, a piezoelectric energy harvester can generate uniform energy by transferring uniform pressure to a piezoelectric material by comprising a pressure transfer unit between a push plate and the piezoelectric material. In addition, according to an embodiment of the present invention, a wireless switch can transfer a radio frequency (RF) communication signal to an external electronic device by using voltage generated in the piezoelectric energy harvester as driving power.

Description

[0001] Piezoelectric energy harvester and wireless switch including same [0002]

The present invention relates to a piezoelectric energy harvester and a wireless switch including the same.

In general, the blinking of the illumination takes place via the switch, which is normally located on the wall of the building, since the switch must be located at a position that the user can reach. Therefore, the power supply line applied to the switch is formed inside the wall surface of the building.

When the light is blinked, the user manually operates the switch to turn on or off the light after moving directly to the wall provided with the switch. This method is inconvenient to operate, and after being turned off at night, There is an inconvenience in operating the switch due to difficulty in identification.

Therefore, a wireless switch device is required to solve the inconvenience of such a manual operation and conveniently flash the illumination.

In such a wireless switch device, when a user operates a transmitter such as a remote controller, an illumination control signal is wirelessly transmitted from a remote controller, and a wireless signal is received by a receiver provided on a wall or the like, thereby lighting or turning off the illumination.

Since the wireless switch device incorporates a battery or the like in a transmitter of a remote controller or the like, it is inconvenient to periodically replace the battery.

An object of the present invention is to provide a piezoelectric energy harvester for providing driving power to a transmission module provided in a wireless switch and a wireless switch including the same.

It is another object of the present invention to provide a piezoelectric energy harvester capable of transmitting a uniform pressure to a piezoelectric element provided in a piezoelectric energy harvester and a wireless switch including the piezoelectric energy harvester.

A piezoelectric energy harvester according to an embodiment of the present invention includes a pressure transmitting portion between a presser plate and a piezoelectric body to generate a uniform energy by transmitting a uniform pressure to the piezoelectric body.

In addition, the wireless switch according to an embodiment of the present invention can transmit an RF communication signal to an external electronic device using a voltage generated from the piezoelectric energy harvester as a driving power source.

The piezoelectric energy harvester according to an embodiment of the present invention can provide driving power to a transmission module provided in a wireless switch. Accordingly, a wireless switch including a piezoelectric energy harvester according to an embodiment of the present invention can be provided with a separate battery It is possible to transmit the blinking signal of the illumination without the built-in flash.

In addition, the piezoelectric energy harvester according to an embodiment of the present invention and the wireless switch including the piezoelectric energy harvester can transmit a uniform pressure to the piezoelectric element.

1 is a plan view of a wireless switch according to an embodiment of the present invention,
2 is a schematic configuration diagram of a wireless switch according to an embodiment of the present invention,
3 is a cross-sectional view of a piezoelectric energy harvester according to an embodiment of the present invention,
4 is a cross-sectional view illustrating operation of a piezoelectric energy harvester according to an embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventive concept. Other embodiments falling within the scope of the inventive concept may be easily suggested, but are also included within the scope of the present invention.

In addition, throughout the specification, a configuration is referred to as being 'connected' to another configuration, including not only when the configurations are directly connected but also when they are indirectly connected with each other . Also, to "include" an element means that it may include other elements, rather than excluding other elements, unless specifically stated otherwise.

The same reference numerals are used to designate the same components in the same reference numerals in the drawings of the embodiments.

FIG. 1 is a plan view of a wireless switch according to an embodiment of the present invention, and FIG. 2 is a schematic configuration diagram of a wireless switch according to an embodiment of the present invention.

1 and 2, a wireless switch according to an embodiment of the present invention includes a piezoelectric energy harvester 100, a rectifier 200, a capacitor 300, a power adjusting unit 400, and a transmitting module 500 do.

The wireless switch according to an embodiment of the present invention can use the power generated from the piezoelectric energy harvester 100 as a driving power source.

The wireless switch can be installed in a part where the user can easily operate.

For example, the wireless switch may be installed on a wall surface or the like. The wireless switch may send a control signal to operate the device located remotely by the transmitting module 500. [

For example, the wireless switch may transmit different wireless signals according to a switching operation of a user to control ON / OFF of an illumination device disposed on a ceiling.

However, the remote device controlled by the wireless switch is not limited to the lighting device, and the wireless switch can control the air conditioner, the audio equipment, and the like disposed on the ceiling.

The ON and OFF buttons shown in FIG. 1 may be provided in a structure that the user can press to generate electric power in the piezoelectric energy harvester 100.

For example, the ON button and the OFF button may be the first elastic part 141 of the piezoelectric energy harvester 100.

The piezoelectric energy harvester 100 provides the driving energy required for operation of the wireless switch. For example, the piezoelectric energy harvester 100 may provide power necessary for operation of the transmission module 500.

The power generated in the piezoelectric energy harvester 100 is stored in the capacitor 300 via the rectifier 200.

The power supplied from the capacitor 300 is converted into power having a predetermined voltage value through the power adjusting unit 400 and is transmitted to the transmitting module 500.

In the transmission module 500, a communication signal is generated through the power received from the power adjustment unit 400, and the communication signal is transmitted to the reception module of the external electronic device.

That is, the wireless switch according to an embodiment of the present invention can transmit an ON / OFF signal to the external illumination device by using the energy generated from the piezoelectric energy harvester 100 as a driving power source of the transmission module 500 .

Therefore, it is not necessary to take a complicated structure mechanically in order to connect the switch to the illumination in the home, and the wireless control system can be easily constructed.

In addition, since the wireless switch can be easily arranged in a place where power supply is difficult or complicated, a wireless control system can be easily constructed.

In addition, the wireless switch according to an embodiment of the present invention can transmit a flashing signal of an illumination without incorporating a separate battery.

Hereinafter, a configuration of a piezoelectric energy harvester 100 according to an embodiment of the present invention for generating energy used as driving power for the transmission module 500 will be described with reference to FIGS. 3 and 4. FIG.

FIG. 3 is a cross-sectional view of a piezoelectric energy harvester according to an embodiment of the present invention, and FIG. 4 is a cross-sectional view illustrating operation of a piezoelectric energy harvester according to an embodiment of the present invention.

3, a piezoelectric energy harvester 100 according to an embodiment of the present invention includes a plate 110, a piezoelectric element 120 provided on the plate 110, a piezoelectric element 120, And a pressure transmitting portion 140 provided between the pressure plate 130 and the piezoelectric element 120. The pressing plate 130 is disposed to be spaced apart from the pressing plate 130,

The plate 110 is formed in a plate shape and is provided with a material capable of being elastically deformed.

The piezoelectric element 120 is disposed on one side of the plate 110. The piezoelectric element 120 includes a piezoelectric body 121, a first electrode 123 provided on one surface of the piezoelectric body 121, and a second electrode 125 provided on the other surface of the piezoelectric body 121.

In addition, the plate 110 may be supported by a support.

For example, the support portions may be disposed at both ends of the plate 110 to support the plate 110. [

Therefore, the plate 110 can be resiliently deformed together with the piezoelectric element 120 while being supported by the support portion.

The pressure plate 130 is spaced apart from the piezoelectric element 120. The pressure plate 130 is provided with a through hole (not shown) passing through the pressure plate 130, and the through hole The pressure transmitting portion 140 is inserted and disposed.

For example, one side of the pressure transducer 140 is inserted into the through hole (not shown), and the other side of the pressure transducer 140 is disposed in contact with one surface of the piezoelectric transducer 120.

The pressure transmitting portion 140 includes a body portion 143 having an upper portion and a lower portion opened and having an inner space, a first elastic portion 141 for sealing the upper portion of the body portion 143, And a second elastic portion 145 that seals the lower portion of the second elastic portion 143.

One side of the body portion 143 is inserted into the through hole (not shown), and the other side is disposed in contact with one surface of the piezoelectric element 120.

Here, the body portion 143 has a different area between the upper portion and the lower portion.

For example, the body portion 143 may have a conical shape having different areas of the upper portion and the lower portion. However, the shape of the body part 143 is not limited to a conical shape. If the area of the upper part is different from that of the lower part, the shape of the body part 143 is not limited.

The area of the upper portion of the body portion 143 may be larger than the area of the lower portion of the body portion 143.

The first elastic portion 141 is disposed on the upper portion of the body portion 143 and seals the upper portion of the body portion 143.

The second elastic part 145 is disposed below the body part 143 to seal the lower part of the body part 143.

Accordingly, the inner space of the body portion 143 is pinched by the first elastic portion 141 and the second elastic portion 145.

A fluid C is filled in the inner space of the body portion 143 which is sealed by the first elastic portion 141 and the second elastic portion 145.

Here, the fluid C filled in the inner space of the body portion 143 may be an incompressible fluid.

The fluid C may transmit the pressure applied to the first elastic part 141 to the second elastic part 145 when a pressure is applied to the first elastic part 141.

For example, when a pressure is applied to the first elastic portion 141 (for example, a pressure of which the user presses the first elastic portion 141), the first elastic portion 141 is pressed And the pressure is transmitted to the second elastic portion 145 through the fluid C. [

Accordingly, pressure is also applied to one surface of the piezoelectric element 120 that is in contact with the second elastic portion 145 through the second elastic portion 145, and displacement occurs in the piezoelectric element 120 .

Here, when no pressure is applied to the first elastic part 141, it is preferable that the displacement is not generated in the piezoelectric element 120.

Therefore, it is preferable that the second elastic part 145 is not displaced in the direction toward the piezoelectric element 120 due to the weight of the second elastic part 145 and the fluid C.

On the other hand, it is also possible that the body portion 143 is filled with a solid other than the fluid.

In this case, it is preferable that the solid has an elastic force so that the pressure applied to the first elastic part 141 can be transmitted to the second elastic part 145.

When a displacement occurs in the piezoelectric element 120, a piezoelectric effect in which a potential difference appears is generated.

For example, when the user presses the first elastic portion 141 provided on the pressure plate 130, the first elastic portion 141 is displaced.

When the displacement occurs in the first elastic part 141, the volume of the fluid C filled in the inner space of the body part 143 changes, .

Since the second elastic part 145 contacts one surface of the piezoelectric element 120, the pressure applied to the second elastic part 145 is transmitted to the piezoelectric element 120 as well.

When the pressure is applied to the piezoelectric element 120 through the second elastic part 145, the piezoelectric element 120 is displaced.

When a displacement occurs in the piezoelectric element 120, electrical polarization occurs in the piezoelectric element 120.

Accordingly, a voltage is generated at the first electrode 123 and the second electrode 125 provided on one surface of the piezoelectric body 121, and an output current generated therefrom is supplied to the driving power source of the transmission module 500 .

The piezoelectric body 121 may be formed of Lead zirconate titanate, BaTiO 3, PbTiO 3, LiNbO 3, or SiO 2.

The second electrode 125 is provided for generating a potential difference and is provided on the other surface of the piezoelectric body 121 to correspond to the first electrode 123.

Meanwhile, when the force acts on the first elastic part 141, the force can be uniformly transmitted to the piezoelectric element 120 by the pressure transmitting part 140.

4, the pressure applied to the first elastic portion 141 is P1, the area of the first elastic portion 141 is A1, the pressure applied to the second elastic portion 145 is P2 , And the area of the second elastic part 145 is A2, the pressure applied to the second elastic part 145 can be calculated by the following equation (1).

Figure pat00001

Here, n may be in the range of 1? N? 2.

Therefore, when the area A1 of the first elastic part 141 is larger than the area A2 of the second elastic part 145, the pressure P2 applied to the second elastic part 145 is Becomes greater than the pressure P1 applied to the first elastic portion 141. [

That is, P2> P1 can be satisfied.

When the pressure P2 higher than the pressure P1 applied to the first elastic portion 141 is applied to the second elastic portion 145, the second elastic portion 145 and the piezoelectric element 120 are separated from each other, The pressure P2 applied to the second elastic portion 145 is applied to the piezoelectric element 120 as well.

Therefore, a pressure P2 higher than the pressure P1 applied to the first elastic portion 141 can be applied to the piezoelectric element 120. [

That is, even when a relatively small pressure P1 is applied to the first elastic portion 141 when the user presses the first elastic portion 141, a relatively large pressure P2 is applied to the piezoelectric element 120 Lt; / RTI >

Therefore, when the user presses the first elastic portion 141, even if a relatively small pressure P1 is applied to the first elastic portion 141, the amount of displacement of the piezoelectric element 120 can be increased, The amount of power generated in the piezoelectric energy harvester 100 according to the embodiment of the present invention can be increased.

Meanwhile, a uniform pressure may be transmitted to a portion of one surface of the piezoelectric element 120 that is in contact with the second elastic portion 145.

Since the pressure applied to the first elastic portion 141 is transmitted to the second elastic portion 145 by the fluid C filled in the inner space of the body portion 143, A uniform pressure is transmitted to the portion of the one surface that is in contact with the second elastic portion 145.

Here, when one surface of the piezoelectric element 120 is entirely in contact with the second elastic portion 145, a uniform pressure P2 may be entirely transmitted to one surface of the piezoelectric element 120. [

Uniform pressure can be transmitted to one surface of the piezoelectric element 120 which is in contact with the second elastic part 145 by the fluid C filled in the inner space of the body part 143. [

As described above, the pressure is transmitted to the piezoelectric element 120 through the pressure transmitting portion 140, and the power generated by the displacement of the piezoelectric element 120 is transmitted to the transmitting module 500, And can be used as a driving power source for the display unit 500.

Therefore, the wireless switch according to an embodiment of the present invention can transmit a communication signal to an external electronic device without installing a separate battery.

The piezoelectric energy harvester according to an embodiment of the present invention can provide a driving power to a transmission module included in a wireless switch. Accordingly, a piezoelectric energy harvester according to an embodiment of the present invention includes a piezoelectric energy harvester The wireless switch can transmit a blinking signal of the light without having to install a separate battery.

In addition, the piezoelectric energy harvester according to an embodiment of the present invention and the wireless switch including the piezoelectric energy harvester can transmit a uniform pressure to the piezoelectric element.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be apparent to those skilled in the art that changes or modifications may fall within the scope of the appended claims.

100: Piezoelectric energy harvester
200: rectifier
300: capacitor
400:
500: Transmission module
110: Plate
120: piezoelectric element
121:
123: first electrode
125: second electrode
130:
140:
141: first elastic part
143:
145: second elastic portion

Claims (13)

plate;
A piezoelectric element disposed on one surface of the plate;
A pressure plate spaced apart from the piezoelectric element; And
And a pressure transmitting portion provided between the pressure plate and the piezoelectric element.
The method according to claim 1,
Wherein the pressure plate is formed with a through hole passing through the pressure plate, one side of the pressure transmitting portion is inserted into the through hole, and the other side of the pressure transmitting portion is disposed in contact with the piezoelectric element.
The method according to claim 1,
The pressure-
A body portion having an open top and an open bottom and having an internal space;
A first elastic part for sealing the upper part of the body part; And
And a second resilient portion for sealing the lower portion of the body portion.
The method of claim 3,
Wherein the body portion has a different area from the upper portion to the lower portion.
5. The method of claim 4,
Wherein the body is a conical piezoelectric energy harvester.
The method of claim 3,
Wherein the inner space of the body portion is filled with a fluid.
The method according to claim 6,
Wherein the fluid is an incompressible fluid.
The method of claim 3,
And the inner space of the body portion is filled with a solid having an elastic force.
The method of claim 3,
Wherein the first elastic portion is inserted into the through hole passing through the pressure plate, and the second elastic portion is in contact with the piezoelectric element.
10. The method of claim 9,
Wherein the area of the first elastic portion and the area of the second elastic portion are different from each other.
10. The method of claim 9,
Wherein the area of the first elastic portion is larger than the area of the second elastic portion.
10. The method of claim 9,
Wherein a pressure acting on the first elastic portion is smaller than a pressure acting on the second elastic portion when a force is applied to the first elastic portion.
A piezoelectric energy harvester according to any one of the claims 1 to 12; And
And a transmitting module configured to transmit an electric signal using power generated from the piezoelectric energy harvester as a driving power source.

KR1020150056709A 2014-09-01 2015-04-22 Piezo-electric energy harvester and wireless switch including the same KR101740787B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201510552634.2A CN105391340B (en) 2014-09-01 2015-09-01 Piezoelectric energy collector and the wireless switching for including it
US14/842,147 US10103651B2 (en) 2014-09-01 2015-09-01 Piezoelectric energy harvester and wireless switch including the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR20140115721 2014-09-01
KR1020140115721 2014-09-01

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Publication number Priority date Publication date Assignee Title
FI20096034A (en) 2009-10-08 2011-04-09 Vti Technologies Oy METHOD AND SYSTEM FOR ENERGY RECOVERY
JP5479027B2 (en) * 2009-10-28 2014-04-23 京セラ株式会社 Power generation member and power generation apparatus using the same
JP5975565B2 (en) * 2012-08-08 2016-08-23 浩平 速水 Power generator

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