KR20190032802A - Energy harvesting apparatus - Google Patents

Abstract

The present invention relates to an energy harvesting apparatus capable of collecting power by using a photothermal characteristic. The energy harvesting apparatus comprises: a heating unit generating heat by light of a specific wavelength range; a heat-electricity conversion unit converting the heat generated from the heating unit into electricity; a power supply unit collecting the converted electricity from the heat-electricity conversion unit, storing power and supplying the stored power; and a control unit confirming whether the stored power in the power supply unit reaches a preset reference value and controlling the power supplying unit to output the stored power when the stored power reaches the reference value.

Description

[0001] ENERGY HARVESTING APPARATUS [0002]

The present invention relates to an energy collecting apparatus, and more particularly, to an energy collecting apparatus capable of collecting power using photothermal characteristics.

Recently, various IoT wireless sensor products have been developed.

One of the development issues of these devices is the power supply problem, and the battery is mainly used due to the power consumption.

However, due to limitations in battery size and capacity, it is necessary to replace or charge the battery regularly as well as the size and design of the product.

In order to solve this problem, energy harvesting techniques are being developed that can utilize various energy sources existing in the vicinity such as light, heat, and mechanical energy.

However, the energy harvesting technique has a lot of restrictions on the use environment.

For example, a solar cell can not be used in a light-free underground environment, and a thermoelectric device can be used only in a specific location where heat is generated.

In this background, the IoT wireless sensor using energy harvesting technology is an on-demand type energy collecting device capable of driving the sensor by generating and transmitting energy only when the user needs the sensor value Development of an energy collecting device capable of generating and collecting energy without being affected by a specific environment is required.

The present invention is directed to solving the above-mentioned problems and other problems. Another object of the present invention is to provide a method and apparatus for converting a heat generated by light into electric power using a heat generating unit and a thermoelectric conversion unit and collecting the electric power and supplying power when the collected electric power reaches a reference value, On-demand type energy collecting apparatus capable of supplying electric power to the power supply apparatus.

Another object of the present invention is to provide an energy collecting device capable of supplying power even in an environment where there is no energy source by forming a wireless sensor power supply module by integrally packaging a wireless sensor, a heat generating portion, a thermoelectric conversion portion, a power supply portion and a control portion do.

Another object of the present invention is to provide an energy collecting apparatus capable of efficiently collecting electric power by improving the heat generating property and preventing deterioration by applying a heat generating material obtained by mixing at least one heat generating material and organic material.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

An energy collecting apparatus according to an embodiment of the present invention includes a heat generating unit generating heat by light of a specific wavelength band, a thermoelectric converting unit converting heat generated from the heat generating unit into electricity, And a control unit for checking whether the power stored in the power supply unit reaches a predetermined reference value and for controlling the power supply unit to output the stored power when the stored power reaches a reference value, have.

Here, the heat generating portion may include a material that absorbs light of a wavelength range of about 900 nm to 1000 nm to generate heat.

The heat generating portion may be a mixture of at least one heat generating material and an organic material.

The power supply unit may include a storage unit for collecting electricity converted from the thermoelectric conversion unit and storing power, and a switching unit for switching the power stored in the storage unit according to a control signal.

Then, the control unit senses the power stored in the storage unit of the power supply unit, compares the sensed power with a preset reference voltage, and turns on the switching unit of the power supply unit when the stored power reaches the reference voltage. And outputs the power stored in the storage unit of the power supply unit. When the stored power reaches the reference voltage, the switching unit of the power supply unit is turned off to block the output of the power stored in the storage unit of the power supply unit.

The present invention may further include a heat transfer unit disposed between the heat generating unit and the thermoelectric conversion unit.

Here, the heat transfer portion may have a plurality of heat transfer layers having different thermal conductivity, and the plurality of heat transfer layers are spaced apart from the heat generating portion, and the heat transfer layer having a higher thermal conductivity is arranged closer to the thermoelectric conversion portion, And the heat transfer layer having a low thermal conductivity can be disposed closer to the heat generating portion.

Next, the present invention may further include a transparent heat insulating portion disposed around the heat generating portion to block the flow of the internal heat.

Here, the transparent heat insulating part may be formed with an anti-reflective (AR) coating film on the inner side facing the heat generating part.

The present invention may further include a wireless sensor that performs a sensing function based on the supplied power when power is supplied from the power supply unit.

Here, the wireless sensor may be integrally packaged together with the heat generator, the thermoelectric converter, the power supplier, and the controller to form a wireless sensor power supply module.

In addition, the present invention may further include a light irradiating unit for irradiating light of a specific wavelength band to the heat generating unit of the wireless sensor power supply module.

Here, the light irradiation unit may include a direction control unit for controlling the emission direction of the generated light.

When the number of the wireless sensor power supply modules is plural, the light irradiating unit can control the light output direction according to the control of the direction control unit and sequentially irradiate light to the heat generating unit of each wireless sensor power supply module.

Effects of the energy collecting apparatus according to the present invention will be described as follows.

According to at least one of the embodiments of the present invention, the heat generated by the light is converted into electric power by using the heat generating unit and the thermoelectric conversion unit and collected, and when the collected electric power reaches the reference value, An on-demand type of drive capable of supplying power to a specific device such as a sensor is possible.

According to at least one of the embodiments of the present invention, the wireless sensor power supply module is formed by integrally packaging the wireless sensor, the heat generator, the thermoelectric conversion unit, the power supply unit, and the control unit, Can supply.

In addition, according to at least one embodiment of the present invention, by applying the exothermic material obtained by mixing at least one exothermic material and organic material, the exothermic characteristic is improved and the deterioration phenomenon is prevented, thereby efficiently collecting electric power.

Therefore, the present invention can be applied to various environments such as an environment free from an energy source for energy harvesting from light, heat, etc., an environment having poisonous gas harmful to the human body such as a chimney, and an environment having a wide place This is possible.

The present invention can expand on the application field of energy harvesting by making it possible to manufacture an on-demand type device which can complement the energy harvesting technique with a lot of environmental constraints and can be used as needed.

Further scope of applicability of the present invention will become apparent from the following detailed description. It should be understood, however, that the detailed description and specific examples, such as the preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art.

FIG. 1 is a block diagram for explaining an energy collecting apparatus according to the present invention.
Fig. 2 is a view for explaining a heat generating portion of Fig. 1. Fig.
3 is a block diagram illustrating the power supply unit of FIG.
4 is a circuit configuration diagram for explaining the power supply unit of FIG.
FIG. 5 is a block diagram illustrating the control unit of FIG. 1. Referring to FIG.
6 is a circuit configuration diagram for explaining the control unit of FIG.
7 is a block diagram for explaining an energy collecting apparatus according to a second embodiment of the present invention.
Figs. 8 and 9 are structural cross-sectional views showing the heat transfer portion of Fig. 7. Fig.
10 is a view for explaining a transparent insulating portion of an energy collecting apparatus according to the present invention.
11 is a front perspective view showing a wireless sensor power supply module with a wireless sensor attached thereto.
12 is a rear perspective view showing a wireless sensor power supply module with a wireless sensor attached thereto.
Figure 13 is an exploded view of a wireless sensor power supply module with a wireless sensor attached.
FIG. 14 is a diagram for explaining heat generation characteristics according to the mixing ratio of the heat generating portion of FIG. 1; FIG.
15 is a diagram showing the operation timing of the wireless sensor according to the power supply of the wireless sensor power supply module.
16 is a view for explaining an energy collecting apparatus including a plurality of wireless sensor power supply modules.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

1 is a block diagram for explaining an energy collecting apparatus according to a first embodiment of the present invention.

1, the energy collecting apparatus according to the present invention may include a heat generating unit 110, a thermoelectric converting unit 120, a power supplying unit 130, and a control unit 140. [

Here, the heat generating unit 110 may generate heat by light of a specific wavelength band.

For example, when the light in the near infrared ray wavelength range is incident on the heat generating portion 110, heat of the maximum temperature can be generated.

Here, the near infrared ray wavelength band may be about 900 nm to about 1000 nm, but is not limited thereto.

That is, the heat generating unit 110 may include a material that absorbs light of a wavelength range of about 900 nm to about 1000 nm to generate heat.

The heat generating unit 110 may be a mixture of at least one heat generating material and an organic material.

For example, the exothermic agent may be selected from the group consisting of graphene oxide (GO), hexagonal-boron nitride (h-BN), graphene, and carbon nanotubes (CNTs) But it is not limited thereto.

And, the organic material may include, but is not limited to, polydimethylsiloxane (PDMS).

In addition, the mixing ratio of the exothermic agent and the organic substance in the heat generating portion 110 may be 1:20 to 1: 100.

This is because if the amount of organic matter in the heat generating portion 110 is too small, deterioration will occur and the lifetime will be lowered. If the amount of organic matter in the heat generating portion 110 is too large, the heat generating characteristics may be deteriorated.

Further, the heat generating portion 110 may be a film type having a thickness of about 0.1 mm to about 3 mm.

The reason for this is that if the thickness of the heat generating portion 110 is too thin, deterioration will occur and the lifetime will be lowered. If the thickness of the heat generating portion 110 is too thick, the heat generating characteristics may be deteriorated.

Next, the thermoelectric conversion unit 120 can convert the heat generated from the heat generating unit 110 into electricity.

Then, the power supply unit 130 may collect the converted electricity from the thermoelectric conversion unit 120, store the electric power, and supply the stored electric power.

Here, the power supply unit 130 may include a storage unit for collecting electricity converted from the thermoelectric conversion unit 120 and storing power, and a switching unit for switching the power stored in the storage unit according to a control signal .

For example, the storage unit of the power supply unit 130 may include a capacitor that stores power input from the thermoelectric conversion unit 120, and a diode that is electrically connected between the output terminal of the thermoelectric conversion unit 120 and the input terminal of the capacitor .

The control unit 140 may check whether the power stored in the power supply unit 130 reaches a preset reference value and may control the power supply unit 130 to output the stored power when the stored power reaches the reference value.

Here, the control unit 140 senses the power stored in the storage unit of the power supply unit 130, compares the sensed power with a preset reference voltage, and when the stored power reaches the reference voltage, The switching unit of the power supply unit 130 is turned on to output the power stored in the storage unit of the power supply unit 130 and the switching unit of the power supply unit 130 is turned off when the stored power reaches the reference voltage, 130 may block the output of the power stored in the storage unit.

For example, the control unit 140 may include a sensing unit that senses the power stored in the storage unit of the power supply unit 130, a reference voltage generation unit that generates a predetermined reference voltage, and a comparison unit that compares the sensed power with the reference voltage And a control signal generator for generating a control signal.

Here, the sensing unit may include a resistor connected in parallel with the capacitor of the power supply unit 130. [

The reference voltage generator may include a distribution resistor that is connected in series with the first resistor and the second resistor to generate a reference voltage.

For example, the reference voltage Ref may be expressed as: Ref = X * {R2 / (R1 + R2)}, where X is the voltage value applied to the distribution resistor, R1 is the first resistance value, Can be calculated by a formula determined by the following equation.

Next, the control signal generating unit may include a comparator for comparing the sensed power from the sensing unit to a reference voltage to generate a control signal, and a diode for transmitting the control signal generated from the comparator to the power supply unit 130 .

In some cases, the present invention may further include a heat transfer portion disposed between the heat generating portion 110 and the thermoelectric conversion portion 120.

Here, the heat transfer portion may be a heat conductive grease, but is not limited thereto.

In one example, the heat transfer portion may be a single layer having a predetermined thermal conductivity, but in other cases, a plurality of heat transfer layers having different thermal conductivity may be laminated.

The plurality of heat transfer layers are separated from the heat generating portion 110 and disposed in the vicinity of the thermoelectric conversion portion 120 so that the heat transfer layer having a higher thermal conductivity is disposed. The heat transfer layer having a lower thermal conductivity can be disposed.

In another case, the present invention may further include a transparent heat insulating portion disposed around the heat generating portion 110 to block the flow of the internal heat.

Here, an AR coating film may be formed on the inner surface of the transparent heat insulating portion facing the heat generating portion 110.

As another example, the present invention may further include a wireless sensor that performs a sensing function based on power supplied when power is supplied from the power supply unit 130. [

Here, the wireless sensor may be integrally packaged together with the heat generating unit 110, the thermoelectric conversion unit 120, the power supply unit 130, and the control unit 140 to form a wireless sensor power supply module.

In some cases, the wireless sensors may be separately isolated and powered through the energy collection device of the present invention.

In addition, the present invention may supply power required for devices that perform various functions in addition to a wireless sensor.

As another example, the present invention may further include a light irradiating section for irradiating light of a specific wavelength band to the heat generating section 110 of the wireless sensor power supply module.

Here, the light irradiating unit may be disposed at a predetermined distance from the wireless sensor power supply module, and may irradiate light to the heat generating unit 110 of the wireless sensor power supply module.

Optionally, the light irradiating unit may include a direction control unit for controlling the emitting direction of the generated light.

For example, when the number of the wireless sensor power supply modules is plural, the light irradiation unit may control the direction of light emission according to the control of the direction control unit, and sequentially irradiate light to the heat generating unit of each wireless sensor power supply module.

For example, when a plurality of wireless sensor power supply modules are disposed in the periphery of the light irradiation unit, the light irradiation unit can sequentially irradiate light to each wireless sensor power supply module while rotating by the direction control unit.

In this case, each wireless sensor power supply module, which receives light emitted from the light irradiation unit, generates heat by the heat generating unit 110 by the received light, converts the generated heat into electric power, Sensor function can be performed.

Accordingly, in the present invention, the heat generated by the light is converted into electric power by use of the heat generating unit and the thermoelectric conversion unit, and the electric power is supplied when the collected electric power reaches the reference value, It is possible to drive an on-demand type that can supply power to the device.

Further, the present invention can supply electric power even in an environment where there is no energy source, by integrally packaging the wireless sensor, the heat generating portion, the thermoelectric conversion portion, the power supply portion, and the control portion to form the wireless sensor power supply module.

Further, by applying a heat generating material in which at least one exothermic agent and an organic material are mixed, heat generation characteristics are improved and deterioration phenomenon is prevented, so that power can be efficiently collected.

The present invention is applicable to various environments such as an environment in which there is no surrounding energy source for energy harvesting from light, heat, etc., an environment in which poisonous gas harmful to the human body such as a chimney is present, This is possible.

The present invention can expand on the application field of energy harvesting by making it possible to manufacture an on-demand type device which can complement the energy harvesting technique with a lot of environmental constraints and can be used as needed.

Fig. 2 is a view for explaining a heat generating portion of Fig. 1. Fig.

As shown in FIG. 2, in the energy collecting apparatus of the present invention, when light of a specific wavelength range is incident on the heat generating unit 110, heat may be generated by a chemical reaction.

For example, the heat generating portion 110 may use a material capable of generating heat at a maximum temperature when light in the near-infrared wavelength range is incident.

Here, the near infrared ray wavelength band may be about 900 nm to about 1000 nm, but is not limited thereto.

That is, the heat generating unit 110 may include a material that absorbs light of a wavelength range of about 900 nm to about 1000 nm to generate heat.

The heat generating unit 110 may be a mixture of at least one heat generating material 112 and an organic material 114.

For example, the exothermic agent 112 may be selected from the group consisting of graphene oxide (GO), hexagonal-boron nitride (h-BN), graphene, carbon nanotubes, CNTs), but the present invention is not limited thereto.

The organic material 114 may include, but is not limited to, polydimethylsiloxane (PDMS).

The mixing ratio of the exothermic agent 112 and the organic material 114 may be 1:20 to 1: 100 in the heat generating portion 110.

This is because when the amount of the organic material 114 in the heat generating portion 110 is too small, a deterioration phenomenon occurs and the lifetime is lowered. If the amount of the organic material 114 in the heat generating portion 110 is too large, It is because.

Further, the heat generating portion 110 may be a film type having a thickness t of about 0.1 mm to about 3 mm.

This is because if the thickness t of the heat generating portion 110 is too small, deterioration will occur and the life of the heat generating portion 110 will deteriorate. If the thickness t of the heat generating portion 110 is too large,

Accordingly, by applying a heat generating material obtained by mixing at least one heat generating agent and an organic material, the heat generating characteristic is improved and the deterioration phenomenon is prevented, thereby efficiently collecting electric power.

FIG. 3 is a block diagram illustrating a power supply unit of FIG. 1, and FIG. 4 is a circuit diagram illustrating a power supply unit of FIG. 1. Referring to FIG.

As shown in FIG. 3, the power supply unit 130 may collect the converted electricity from the thermoelectric conversion unit, store the electric power, and supply the stored electric power.

Here, the power supply unit 130 may include a storage unit 132 and a switching unit 134.

The storage unit 132 of the power supply unit 130 collects the electricity converted from the thermoelectric conversion unit and stores the electric power and the switching unit 134 of the electric power supply unit 130 stores the electric power stored in the storage unit 132 And can be switched according to the control signal to be outputted.

For example, as shown in FIG. 4, the storage unit 132 of the power supply unit 130 may include a capacitor 132-2 that stores power input from the thermoelectric conversion unit.

The power supply unit 130 may include a diode 132-1 electrically connected between the output terminal of the thermoelectric conversion unit and the input terminal of the capacitor 132-2.

FIG. 5 is a block diagram illustrating the control unit of FIG. 1, and FIG. 6 is a circuit diagram illustrating the control unit of FIG. 1. Referring to FIG.

As shown in FIG. 5, the control unit 140 may check whether the power stored in the power supply unit reaches a predetermined reference value, and may control the power supply unit so that the stored power is output when the stored power reaches the reference value.

For example, the control unit 140 may include a sensing unit 142 that senses the power stored in the storage unit of the power supply unit, a reference voltage generation unit 144 that generates a predetermined reference voltage, And a control signal generator 146 for generating a control signal.

Here, as shown in FIG. 6, the sensing unit 142 may include a resistor 142 connected in parallel with the capacitor of the power supply unit 132.

The reference voltage generator 144 may include a distribution resistor that is connected in series with the first resistor R1 and the second resistor R2 to generate a reference voltage.

For example, the reference voltage Ref may be expressed as: Ref = X * {R2 / (R1 + R2)}, where X is the voltage value applied to the distribution resistor, R1 is the first resistance value, Can be calculated by a formula determined by the following equation.

The control signal generator 146 includes a comparator 146-1 for comparing the sensed power from the sensing unit 142 to a reference voltage and generating a control signal, And a diode 146-2 for transmitting the control signal to the switching unit of the power supply unit 130. [

That is, the control unit 140 senses the power stored in the storage unit of the power supply unit 132 through the sensing unit 142, generates a preset reference voltage through the reference signal generation unit 144, If the stored power reaches the reference voltage, the switching unit of the power supply unit is turned on to compare the power stored in the storage unit of the power supply unit And when the stored power reaches the reference voltage, the switching unit of the power supply unit is turned off to cut off the output of the power stored in the storage unit of the power supply unit.

Accordingly, in the present invention, the heat generated by the light is converted into electric power by use of the heat generating unit and the thermoelectric conversion unit, and the electric power is supplied when the collected electric power reaches the reference value, It is possible to drive an on-demand type that can supply power to the device.

FIG. 7 is a block diagram illustrating an energy collecting apparatus according to a second embodiment of the present invention, and FIGS. 8 and 9 are cross-sectional views illustrating a heat transfer unit of FIG.

7, the energy collecting apparatus according to the second embodiment of the present invention includes a heat generating unit 110, a heat transfer unit 150, a thermoelectric conversion unit 120, a power supply unit 130, and a control unit 140).

Here, the remaining components except for the heat transfer part 150 are the same as those of the first embodiment of the present invention, and a detailed description thereof will be omitted.

In the second embodiment of the present invention, the heat transfer part 150 may be disposed between the heat generating part 110 and the thermoelectric conversion part 120.

Here, the heat transfer part 150 may be a heat conductive grease, but is not limited thereto.

In one example, the heat transfer portion 150 may be a single layer having a predetermined thermal conductivity, but in other cases, a plurality of heat transfer layers having different thermal conductivity may be stacked.

8, the heat transfer part 150 may be a single layer disposed between the heat generating part 110 and the thermoelectric conversion part 120 and having a predetermined thermal conductivity.

Here, the heat transfer unit 150 may transmit the heat generated by the heat generating unit 110 to the thermoelectric conversion unit 120.

9, the heat transfer part 150 is disposed between the heat generating part 110 and the thermoelectric conversion part 120, and a plurality of heat transfer layers having different thermal conductivity are stacked It is possible.

The plurality of heat transfer layers 150 are disposed away from the heat generating portion 110 and closer to the thermoelectric conversion portion 120 so that the heat transfer layer having a higher thermal conductivity is disposed. A heat transfer layer having a low thermal conductivity may be disposed adjacent to the heat transfer layer 110.

The plurality of heat transfer layers 150 may include a first heat transfer layer 152, a second heat transfer layer 154, a third heat transfer layer 154, and a second heat transfer layer 152 in the direction from the heat generating portion 110 to the thermoelectric conversion portion 120. [ The transfer layer 156 may be sequentially stacked.

The first heat transfer layer 152 adjacent to the heat generating portion 110 has the lowest thermal conductivity and the third heat transfer layer 156 adjacent to the thermoelectric conversion portion 120 has the lowest thermal conductivity. The heat conduction rate of the heat transfer medium may be highest.

The reason for arranging the plurality of heat transfer layers having different thermal conductivity is that the heat generated in the heat generating portion 110 can be efficiently and uniformly and rapidly transferred to the thermoelectric conversion portion 120 without loss.

10 is a view for explaining a transparent insulating portion of an energy collecting apparatus according to the present invention.

As shown in FIG. 10, the present invention may further include a transparent heat insulating portion 160 disposed around the heat generating portion 110 to block the flow of internal heat.

Here, the transparent heat insulating part 160 may be formed with an anti-reflective (AR) coating film 162 on the inner side facing the heat generating part 110.

The reason why the non-reflective coating film is formed is that light of a specific wavelength incident from the outside is directly reflected on the heat generating portion 110 without being reflected and reflected by the anti-reflection coating film, thereby improving energy efficiency while reducing energy loss.

11 is a front perspective view showing a wireless sensor power supply module with a wireless sensor attached thereto, FIG. 12 is a front perspective view showing a wireless sensor power supply module with a wireless sensor attached thereto FIG. 13 is an exploded view showing a wireless sensor power supply module with a wireless sensor attached thereto; FIG.

11 to 13, the present invention may further include a wireless sensor 170 that performs a sensing function based on supplied power when power is supplied from the power supply unit.

Here, the wireless sensor 170 is packaged together with the heat generating unit 110, the heat transfer unit 150, the thermoelectric conversion unit 120, the transparent heat insulating unit 160, the power supply unit, and the control unit, Module 180 may be formed.

Optionally, the wireless sensors 170 may be separately isolated and powered through the energy collection device of the present invention.

In addition, the present invention may supply power required for devices that perform various functions in addition to the wireless sensor 170. [

As another example, the present invention may further include a light irradiating section for irradiating light of a specific wavelength band to the heat generating section 110 of the wireless sensor power supply module 180.

Here, the light irradiating unit may be disposed at a predetermined distance from the wireless sensor power supply module, and may irradiate light to the heat generating unit 110 of the wireless sensor power supply module.

As described above, in the wireless sensor power supply module 180 configured as described above, the heat generating portion 110 can generate heat by the light in the near-infrared wavelength band.

Here, the near infrared ray wavelength band may be about 900 nm to about 1000 nm, but is not limited thereto.

That is, the heat generating unit 110 may include a material that absorbs light of a wavelength range of about 900 nm to about 1000 nm to generate heat.

The heat generating unit 110 may be a mixture of at least one heat generating material and an organic material.

For example, the exothermic agent may be selected from the group consisting of graphene oxide (GO), hexagonal-boron nitride (h-BN), graphene, and carbon nanotubes (CNTs) But it is not limited thereto.

And, the organic material may include, but is not limited to, polydimethylsiloxane (PDMS).

In addition, the mixing ratio of the exothermic agent and the organic substance in the heat generating portion 110 may be 1:20 to 1: 100.

This is because if the amount of organic matter in the heat generating portion 110 is too small, deterioration will occur and the lifetime will be lowered. If the amount of organic matter in the heat generating portion 110 is too large, the heat generating characteristics may be deteriorated.

Further, the heat generating portion 110 may be a film type having a thickness of about 0.1 mm to about 3 mm.

The reason for this is that if the thickness of the heat generating portion 110 is too thin, deterioration will occur and the lifetime will be lowered. If the thickness of the heat generating portion 110 is too thick, the heat generating characteristics may be deteriorated.

Next, the thermoelectric conversion unit 120 can convert the heat generated from the heat generating unit 110 into electricity.

A heat transfer unit 150 may further be disposed between the heat generating unit 110 and the thermoelectric conversion unit 120.

Here, the heat transfer part 150 may be a heat conductive grease, but is not limited thereto.

In one example, the heat transfer portion 150 may be a single layer having a predetermined thermal conductivity, but in other cases, a plurality of heat transfer layers having different thermal conductivity may be stacked.

Next, the power supply unit can collect the converted electricity from the thermoelectric conversion unit 120, store the electric power, and supply the stored electric power.

The control unit may check whether the power stored in the power supply unit reaches a preset reference value, and may control the power supply unit to output the stored power when the stored power reaches the reference value.

Here, the control unit senses the power stored in the storage unit of the power supply unit, compares the sensed power with a preset reference voltage, and when the stored power reaches the reference voltage, the control unit switches the switching unit of the power supply unit 130 The switching unit of the power supply unit is turned off when the stored power reaches the reference voltage to shut off the output of the power stored in the storage unit of the power supply unit.

Further, the transparent heat insulating portion 160 may be disposed around the heat generating portion 110 to block the flow of the internal heat.

Here, the transparent heat insulating portion 160 may be formed with an anti-reflective (AR) coating film on the inner side facing the heat generating portion 110.

As described above, the wireless sensor power supply module 180 that receives the light emitted from the light irradiating unit generates heat by the heat generating unit 110 by the received light, converts the generated heat into electric power, and supplies power , The wireless sensor function can be performed.

Accordingly, in the present invention, the heat generated by the light is converted into electric power by use of the heat generating unit and the thermoelectric conversion unit, and the electric power is supplied when the collected electric power reaches the reference value, It is possible to drive an on-demand type that can supply power to the device.

Further, the present invention can supply electric power even in an environment where there is no energy source, by integrally packaging the wireless sensor, the heat generating portion, the thermoelectric conversion portion, the power supply portion, and the control portion to form the wireless sensor power supply module.

Further, by applying a heat generating material in which at least one exothermic agent and an organic material are mixed, heat generation characteristics are improved and deterioration phenomenon is prevented, so that power can be efficiently collected.

The present invention is applicable to various environments such as an environment in which there is no surrounding energy source for energy harvesting from light, heat, etc., an environment in which poisonous gas harmful to the human body such as a chimney is present, This is possible.

The present invention can expand on the application field of energy harvesting by making it possible to manufacture an on-demand type device which can complement the energy harvesting technique with a lot of environmental constraints and can be used as needed.

FIG. 14 is a diagram for explaining heat generation characteristics according to the mixing ratio of the heat generating portion of FIG. 1; FIG.

As shown in FIG. 14, in the energy collecting apparatus according to the present invention, it can be seen that the exothermic characteristic is controlled according to the material used in the heat generating portion, and the amount of generated power is also varied.

The heat generating portion of the energy collecting device may include a material that absorbs light having a wavelength of about 900 nm to about 1000 nm to generate heat. The heat generating portion may be a mixture of at least one heat generating material and an organic material.

Here, the exothermic agent may be at least one of graphene oxide (GO), hexagonal-boron nitride (h-BN), graphene, and carbon nanotubes (CNTs) But is not limited thereto.

And, the organic material may include, but is not limited to, polydimethylsiloxane (PDMS).

In addition, the mixing ratio of the exothermic agent and the organic substance in the heat generating portion 110 may be 1:20 to 1: 100.

This is because if the amount of organic matter in the heat generating portion 110 is too small, deterioration will occur and the lifetime will be lowered. If the amount of organic matter in the heat generating portion 110 is too large, the heat generating characteristics may be deteriorated.

Further, the heat generating portion 110 may be a film type having a thickness of about 0.1 mm to about 3 mm.

The reason for this is that if the thickness of the heat generating portion 110 is too thin, deterioration will occur and the lifetime will be lowered. If the thickness of the heat generating portion 110 is too thick, the heat generating characteristics may be deteriorated.

For example, as shown in FIG. 14, a heat generating part prepared by mixing graphene oxide (GO), which is a heat generating agent, and polydimethylsiloxane (PDMS), which is an organic material, at a mixing ratio of about 1: When the infrared ray having a wavelength of about 980 nm is incident on the heat generating portion, the surface temperature of the heat generating portion rises to about 81.3 degrees and when the heat of about 81.3 degrees is converted into electricity, about 230.16 mV of power can be collected.

As shown in FIG. 14, a heat generating part prepared by mixing graphene oxide (GO), which is a heat generating agent, and polydimethylsiloxane (PDMS), which is an organic material, at a mixing ratio of about 1:20 is disposed in an energy collecting device The infrared ray having a wavelength of about 980 nm is incident on the heat generating portion, the surface temperature of the heat generating portion rises by about 150 degrees or more, and when the heat of about 150 degrees or more is converted into electricity, about 235.06 mV of power can be collected.

Accordingly, by applying a heat generating material obtained by mixing at least one heat generating agent and an organic material, the heat generating characteristic is improved and the deterioration phenomenon is prevented, thereby efficiently collecting electric power.

15 is a diagram showing the operation timing of the wireless sensor according to the power supply of the wireless sensor power supply module.

As shown in FIG. 15, the present invention may include a wireless sensor that performs a sensing function based on supplied power when power is supplied from a power supply unit.

Here, the wireless sensor may be integrally packaged together with an energy collecting device including a heat generating part, a thermoelectric converting part, a power supplying part and a control part to form a wireless sensor power supplying module.

The control unit of the energy collection device may check whether the power stored in the power supply unit reaches a predetermined reference value and control the power supply unit so that the stored power is output to the wireless sensor when the stored power reaches the reference value.

Here, the control unit senses the power stored in the storage unit of the power supply unit, compares the sensed power with a preset reference voltage, and when the stored power reaches the reference voltage, the control unit turns on the switching unit of the power supply unit. And outputs the power stored in the storage unit of the power supply unit to the wireless sensor. When the stored power reaches the reference voltage, the switching unit of the power supply unit is turned off to cut off the power stored in the storage unit of the power supply unit.

Accordingly, the wireless sensor can be operated by receiving power from the power supply unit under the control of the control unit to perform the sensor function.

That is, the wireless sensor can be driven in response to the power output time of the power supply unit.

The present invention can drive devices that perform various functions in addition to wireless sensors.

16 is a view for explaining an energy collecting apparatus including a plurality of wireless sensor power supply modules.

16, a plurality of wireless sensor power supply modules 180 equipped with a wireless sensor 170 and a heat generating portion disposed in each wireless sensor power supply module 170 are connected to a light source And a light irradiating unit 190 for irradiating the light.

Here, the light irradiating unit 190 may be disposed at a predetermined distance from the wireless sensor power supply module 180, and may irradiate light to the heat generating unit of the wireless sensor power supply module 180.

Optionally, the light irradiating unit 190 may include a direction control unit 192 for controlling the emitting direction of the generated light.

For example, when the number of the wireless sensor power supply modules 180 is plural, the light irradiator 190 controls the direction of light output under the control of the direction controller 192 and outputs the light to the heating unit of each wireless sensor power supply module 180 The light can be sequentially irradiated.

That is, when a plurality of wireless sensor power supply modules 180 are disposed in the periphery of the light irradiating unit 190, the light irradiating unit 190 is sequentially rotated by the direction control unit 192 to each wireless sensor power supply module 180 As shown in FIG.

In this case, each wireless sensor power supply module 180 that receives the light emitted from the light irradiation unit 190 generates heat by the heat generated by the received light, converts the generated heat into electric power, and supplies electric power , The wireless sensor function can be performed.

Accordingly, in the present invention, the heat generated by the light is converted into electric power by use of the heat generating unit and the thermoelectric conversion unit, and the electric power is supplied when the collected electric power reaches the reference value, It is possible to drive an on-demand type that can supply power to the device.

Further, the present invention can supply electric power even in an environment where there is no energy source, by integrally packaging the wireless sensor, the heat generating portion, the thermoelectric conversion portion, the power supply portion, and the control portion to form the wireless sensor power supply module.

Further, by applying a heat generating material in which at least one exothermic agent and an organic material are mixed, heat generation characteristics are improved and deterioration phenomenon is prevented, so that power can be efficiently collected.

The present invention is applicable to various environments such as an environment in which there is no surrounding energy source for energy harvesting from light, heat, etc., an environment in which poisonous gas harmful to the human body such as a chimney is present, This is possible.

The present invention can expand on the application field of energy harvesting by making it possible to manufacture an on-demand type device which can complement the energy harvesting technique with a lot of environmental constraints and can be used as needed.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

The present invention described above can be embodied as computer-readable codes on a medium on which a program is recorded. The computer readable medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of the computer-readable medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like, and also implemented in the form of a carrier wave (for example, transmission over the Internet) . Also, the computer may include a control unit of the terminal.

Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

100: Energy collecting device
110:
120: thermoelectric conversion unit
130:
140:
150: Heat transfer part

Claims (10)

A heat generating unit generating heat by light of a specific wavelength band;
A thermoelectric conversion unit for converting heat generated from the heat generating unit into electricity;
A power supplier for collecting electricity converted from the thermoelectric conversion unit to store electric power and supplying the stored electric power; And,
And a control unit for checking whether the power stored in the power supply unit reaches a preset reference value and controlling the power supply unit to output the stored power when the stored power reaches a reference value. The apparatus according to claim 1,
Wherein heat is generated at a maximum temperature when light in a near-infrared wavelength range is incident. The apparatus according to claim 1,
And a mixture of at least one exothermic agent and an organic material. 4. The method of claim 3, wherein the mixing ratio of the exothermic agent to the organic material
1: 20 to 1: 100. The power supply unit according to claim 1,
A storage unit for collecting electricity converted from the thermoelectric conversion unit and storing electric power; And,
And a switching unit that is switched according to a control signal so that the power stored in the storage unit is output. 6. The apparatus of claim 5,
The control unit senses the power stored in the storage unit of the power supply unit and compares whether the sensed power reaches a preset reference voltage. When the stored power reaches the reference voltage, the switching unit of the power supply unit is turned on and outputs the power stored in the storage unit of the power supply unit when the stored power reaches the reference voltage so as to turn off the switching unit of the power supply unit to shut off the output of the power stored in the storage unit of the power supply unit Wherein the energy collecting device comprises: The apparatus of claim 1,
A sensing unit for sensing a power stored in a storage unit of the power supply unit;
A reference voltage generator for generating a predetermined reference voltage; And,
And a control signal generator for comparing the sensed power with the reference voltage to generate a control signal. The method according to claim 1,
And a heat transfer unit disposed between the heat generating unit and the thermoelectric conversion unit. The method according to claim 1,
And a transparent heat insulating portion disposed around the heat generating portion to block the flow of the internal heat. The method according to claim 1,
And a wireless sensor that performs a sensing function based on the supplied power when power is supplied from the power supply unit.

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